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What are the performance of finned tubes
2022 / 09 / 27
1. Heat conduction characteristic The heat transfer performance of finned tube is related to the contact thermal resistance between the plate fin type and the tube, and the contact thermal resistance is determined by the contact pressure between them. Obviously, the heat transfer characteristics of pad type and sleeve type are better, followed by bimetal rolling type, and the insert type and winding type are very poor. After the KLM finned tube is rolled again, the contact surface will increase by about 50%, and will not be affected by the outer diameter tolerance of the pipe. After many cold and hot cycles, it can still maintain good contact, so the contact thermal resistance is small, and the heat conduction characteristics are relatively high. The grooved finned tube can increase the total heat transfer coefficient by about 20% because it enhances the disturbance of air flow. 2. High temperature resistance When the temperature of the finned tube wall increases, the contact pressure between the plate fin type and the pipe changes, and the contact thermal resistance also changes, which only depends on the finned tube type and the initial contact pressure. The plate fin tension of the wound type decreases rapidly with the increase of temperature, so the contact thermal resistance increases rapidly; However, bimetallic strip rolling can keep balance in a relatively large temperature range. 3. The base tube of atmospheric corrosion resistant horizontal finned tube is maintained by plate fin type to resist atmospheric corrosion. Various types of finned tubes have different atmospheric corrosion resistance due to different maintenance positions. The protection level of various finned tubes, especially the bimetal rolling type, is the best. For all finned tubes with hot-dip galvanized surface, the effect of atmospheric
Four Methods of Finned Tube Radiator
2022 / 09 / 27
In the case of natural heat conduction of finned tube radiator, the air flow is driven by the temperature difference. The surface temperature of high-efficiency finned tube is very high, but the temperature difference cannot drive the air flow. In this way, the heat energy will stay on the surface of the fin, mainly because the air also has a certain viscosity. In the case of insufficient driving force, most of the warm air sticks near the plate fin type and does not flow, leading to the reduction of heat exchange efficiency. The steel finned tube radiator has a high bearing pressure, which is increased by 20% from the industry standard mpa to the enterprise standard. Finned heat sink tubes and steel aluminum composite rolled spiral finned heat sink tubes are more widely used in industrial drying systems and various special drying equipment. Set the distance between the plate fin height and the plate fin type of each heat sink tube, cooperate with the use of the exhaust air volume of the convection fan, and fully ensure that more heat removal effects are achieved in the practical application of heat sink tubes. Whether the steel finned tube radiator and the steel aluminum composite finned tube heat exchanger in the industrial production drying equipment can give full play to the better heat removal effect should be fully considered. The heat exhausting spiral finned tube used in the steel finned tube radiator was earlier produced and processed by winding, while the more stable and reliable production process was high-frequency welding. Finned tube radiator can be divided into four methods: air cooling, air cooling, water cooling, and heat pipe cooling. The following four methods are introduced in detail. Finned tube radiator is air cooling, and finned tube radiator ai
What are the performance of finned tubes
2022 / 09 / 27
1. Heat conduction characteristic The heat transfer performance of finned tube is related to the contact thermal resistance between the plate fin type and the tube, and the contact thermal resistance is determined by the contact pressure between them. Obviously, the heat transfer characteristics of pad type and sleeve type are better, followed by bimetal rolling type, and the insert type and winding type are very poor. After the KLM finned tube is rolled again, the contact surface will increase by about 50%, and will not be affected by the outer diameter tolerance of the pipe. After many cold and hot cycles, it can still maintain good contact, so the contact thermal resistance is small, and the heat conduction characteristics are relatively high. The grooved finned tube can increase the total heat transfer coefficient by about 20% because it enhances the disturbance of air flow. 2. High temperature resistance When the temperature of the finned tube wall increases, the contact pressure between the plate fin type and the pipe changes, and the contact thermal resistance also changes, which only depends on the finned tube type and the initial contact pressure. The plate fin tension of the wound type decreases rapidly with the increase of temperature, so the contact thermal resistance increases rapidly; However, bimetallic strip rolling can keep balance in a relatively large temperature range. 3. The base tube of atmospheric corrosion resistant horizontal finned tube is maintained by plate fin type to resist atmospheric corrosion. Various types of finned tubes have different atmospheric corrosion resistance due to different maintenance positions. The protection level of various finned tubes, especially the bimetal rolling type, is the best. For all finned tubes with hot-dip galvanized surface, the effect of atmospheric
What are the performance of finned tubes
2022 / 09 / 27
1. Heat conduction characteristic The heat transfer performance of finned tube is related to the contact thermal resistance between the plate fin type and the tube, and the contact thermal resistance is determined by the contact pressure between them. Obviously, the heat transfer characteristics of pad type and sleeve type are better, followed by bimetal rolling type, and the insert type and winding type are very poor. After the KLM finned tube is rolled again, the contact surface will increase by about 50%, and will not be affected by the outer diameter tolerance of the pipe. After many cold and hot cycles, it can still maintain good contact, so the contact thermal resistance is small, and the heat conduction characteristics are relatively high. The grooved finned tube can increase the total heat transfer coefficient by about 20% because it enhances the disturbance of air flow. 2. High temperature resistance When the temperature of the finned tube wall increases, the contact pressure between the plate fin type and the pipe changes, and the contact thermal resistance also changes, which only depends on the finned tube type and the initial contact pressure. The plate fin tension of the wound type decreases rapidly with the increase of temperature, so the contact thermal resistance increases rapidly; However, bimetallic strip rolling can keep balance in a relatively large temperature range. 3. The base tube of atmospheric corrosion resistant horizontal finned tube is maintained by plate fin type to resist atmospheric corrosion. Various types of finned tubes have different atmospheric corrosion resistance due to different maintenance positions. The protection level of various finned tubes, especially the bimetal rolling type, is the best. For all finned tubes with hot-dip galvanized surface, the effect of atmospheric
What are the performance of finned tubes
2022 / 09 / 27
1. Heat conduction characteristic The heat transfer performance of finned tube is related to the contact thermal resistance between the plate fin type and the tube, and the contact thermal resistance is determined by the contact pressure between them. Obviously, the heat transfer characteristics of pad type and sleeve type are better, followed by bimetal rolling type, and the insert type and winding type are very poor. After the KLM finned tube is rolled again, the contact surface will increase by about 50%, and will not be affected by the outer diameter tolerance of the pipe. After many cold and hot cycles, it can still maintain good contact, so the contact thermal resistance is small, and the heat conduction characteristics are relatively high. The grooved finned tube can increase the total heat transfer coefficient by about 20% because it enhances the disturbance of air flow. 2. High temperature resistance When the temperature of the finned tube wall increases, the contact pressure between the plate fin type and the pipe changes, and the contact thermal resistance also changes, which only depends on the finned tube type and the initial contact pressure. The plate fin tension of the wound type decreases rapidly with the increase of temperature, so the contact thermal resistance increases rapidly; However, bimetallic strip rolling can keep balance in a relatively large temperature range. 3. The base tube of atmospheric corrosion resistant horizontal finned tube is maintained by plate fin type to resist atmospheric corrosion. Various types of finned tubes have different atmospheric corrosion resistance due to different maintenance positions. The protection level of various finned tubes, especially the bimetal rolling type, is the best. For all finned tubes with hot-dip galvanized surface, the effect of atmospheric
Classification of Finned Tube Radiators
2022 / 09 / 27
Under the condition of natural heat dissipation, the air flow of finned tube radiator is driven by the temperature difference. The surface temperature of high-efficiency finned tube is very high, but the temperature difference cannot drive the air flow. In this way, the heat energy will stay on the part of the fin surface, mainly because the air also has a certain viscosity. Under the condition of insufficient driving force, most of the hot air sticks to the periphery of the fin without fluidity, The heat transfer efficiency is reduced. Finned heat sink tube and steel aluminum composite rolled spiral fin heat sink tube are more and more popular heat sink tubes used in industrial production drying system and various special drying equipment at this stage. Set the distance between the fin height and the fin of each radiator, and use the exhaust air volume of the convection fan to fully ensure that more actual heat dissipation effects are achieved in the practical application of the radiator. Whether the steel finned tube radiator and the steel aluminum composite finned tube heat exchanger in the industrial drying equipment can give full play to the actual effect of more efficient heat dissipation, it is necessary to consider various influencing factors in combination with various factors. The spiral finned tubes used in steel finned tube radiators were earlier processed by winding, and later became stable and reliable by high-frequency welding. Finned tube radiator can be divided into four modes: air cooling, air cooling, water cooling and heat pipe cooling. The following four
Finned tube heat exchanger in the industrial field of attention
2022 / 09 / 27
Finned tube heat exchanger is an indispensable machine and equipment in the overall heat transfer of industrial manufacturing. It is widely used in chemical industry, metallurgy, power, transportation, aviation, aerospace and other industries and other units. In recent years, in view of the development trend of new technology application and new energy development, improving the performance of heat exchanger has attracted more and more attention in the industrial field. Finned tube radiator is one of the very common steel radiator equipment, which is composed of carbon steel frame and carbon steel radiator tube. The steel radiator tube has the advantages of stable frame, compact structure, good sealing, convenient installation and use, etc. Steel finned tube radiator is widely used in steam system and hot water system. Moreover, the steel radiator used for heating air is also used for heating air of hot air heating, air conditioning system and drying device. It is the key equipment in the hot air device. Finned tube radiator Steel finned tube convection radiator is a kind of steel radiator which is not only suitable for steam system, but also suitable for hot water system. As a heating air radiator, it is mainly used for heating air of hot air heating, air conditioning system and drying device. It is a key equipment in the hot air device. The steel finned tube convection radiator can be widely used in the heating and ventilation system of large buildings in the current factories and mining enterprises. The application of new technology, new technology and new technology is more critical to give full play to the role of rice in contemporary industrial
What are the types of finned tube heat exchanger
2022 / 09 / 21
Finned tube radiator is the most widely used heat exchanger in gas and liquid heat exchangers. There are many types of louver fins, such as arc louver fins and rectangular louver fins. The air side heat transfer coefficient and resistance characteristics of heat exchangers with different fin types are different. A large number of experiments have found that the increase of friction is inevitable when good heat exchange characteristics are obtained. Under the given heat exchanger size and fan operation curve, the increase of pressure loss will inevitably result in the reduction of air flow rate, and thus the reduction of heat transfer temperature difference between air and fin wall. Secondly, most of the heat exchangers used in air-conditioning projects operate alternately under dry and wet conditions, while the heat transfer and resistance characteristics of different fin heat exchangers under wet conditions are very different from those under dry conditions. Therefore, how to correctly select the fin type can not be ignored, and the best way is to find a compromise between heat transfer and resistance loss.
What factors affect the frontal wind velocity of finned tube heat exchanger?
2022 / 09 / 21
The determination of the face velocity of finned tube heat exchanger not only affects the calculation method of heat transfer coefficient and air resistance, but also relates to the determination of heat balance and heat transfer area of finned tube heat exchanger. What two factors constrain the size of the headwind speed? Next, let's make a detailed analysis. 1. Increasing the face wind speed can improve the film heat transfer coefficient of finned tube heat exchanger, expand the heat transfer temperature difference and reduce the heat transfer area. However, when the wind speed is increased, the air song will expand rapidly, while the expansion of the heat transfer coefficient is relatively slow. Too high wind speed will lead to poor performance of the fan, and at the same time, it is difficult to match the motor and transmission mechanism. On the other hand, too low wind speed will lead to low heat transfer coefficient and expansion of heat exchange area and equipment cost. Therefore, the size of the frontal wind speed has a reasonable and effective range. 2. The head-on wind speed is corresponding to the total air volume. The face wind speed of finned tube heat exchanger is calculated according to the total air volume and the determined size of the windward face of the heat exchanger. On the whole, the wind speed of finned tube heat exchanger shall be kept within a reasonable and effective range according to the total air volume and the size of the windward area from beginning to end, so as to obtain a higher heat transfer coefficient and a reasonable and effective heat transfer area, thus keeping the de
Selection method of finned tube heat exchanger
2022 / 09 / 21
How to choose finned tube heat exchanger is really a problem that consumers need to think about. Some pay attention to thermal efficiency and whether they can get obvious effect in a short time; Some focus on corrosion resistance due to environmental factors; Also care if the appearance is beautiful 1. The working pressure of finned tube heat exchanger shall adapt to the working pressure of the system and comply with the current relevant product standards; 2. Civil buildings should adopt products with beautiful appearance and easy cleaning; 3. Industrial buildings with high dust emission or dust prevention requirements shall adopt products that are easy to clean; 4. Industrial buildings with corrosive gases or rooms with high relative humidity shall adopt corrosion-resistant products; 5. When steel products are used, the closed system shall be adopted, which shall meet the product's requirements for water quality. The heating system shall be filled with water for maintenance in non heating seasons; 6. When aluminum products are used, internal anti-corrosion aluminum products shall be selected to meet the product requirements for water quality; 7. Select the appropriate manufacturer of finned tube heat exchanger with good after-sales guidance for installation. Wuxi McVeigh Equipment Technology Co., Ltd. has introduced foreign mature technologies and developed laser welded f
Performance Characteristics of High Frequency Welded Finned Tubes
2022 / 09 / 21
High frequency welded finned tubes are widely used in different fields such as waste heat recovery, drying equipment and hot air fans due to their excellent heat dissipation effect. High frequency welded finned tubes have a wide range of applications and have been used in different places such as industry and agriculture. As the main heat dissipation element, high-frequency welded finned tubes provide an excellent guarantee of comfortable temperature for indoor in cold winter. High frequency welded finned tube can be processed according to different needs of users, and its length can reach more than 6 meters. Radiators between different groups are connected with flanges or screw threads. The connection method is reliable, and it is not easy to leak, and the connection and installation methods are simple, and the equipment is easy to operate. Finned tube radiator is a kind of equipment that can improve the heat dissipation rate by installing fins on the base tube. The base tube is generally seamless steel tube. Finned tube radiator has the characteristics of compact structure, reliable process, high heat transfer rate and large heat exchange area, and its heat dissipation area can generally reach 100-20000 square meters.
2022 / 09 / 19
The flue gas waste heat exchanger is a heat exchanger that can re absorb and utilize the heat energy in the high temperature flue gas. Now it is being used in many industries, and the use effect is also very obvious. 1. Introduction of flue gas waste heat exchanger The flue gas waste heat exchanger is a device that uses itself to extract and reuse the heat energy carried in the flue gas, meeting the national strategic policy of promoting energy conservation and emission reduction. Compared with the basic boiler heat exchanger, the heat energy is not fully recovered and utilized, which leads to a large amount of waste gas being discharged after supply. This is not only a high cost investment, but also a high environmental pollution. The appearance of flue gas waste heat exchanger makes the waste heat recovery process more effective. As long as the heat energy is below the acid dew point, all the waste heat can be recovered to improve the system process efficiency. 2. Material of flue gas waste heat exchanger The materials used are mostly stainless steel, carbon steel, fluoroplastics and other raw materials. These materials have the same material that is corrosion resistant, can realize the process of recovering low-temperature flue gas, and can withstand high temperatures. The installation shall be carried out according to the specified instructions. The resistance of the above materials is also very small, which can significantly reduce the working pressure and reduce the degree of ash deposition, thus ensuring the normal operation of the heat exchanger.
2022 / 09 / 19
The flue gas waste heat exchanger is a heat exchanger that can re absorb and utilize the heat energy in the high temperature flue gas. Now it is being used in many industries, and the use effect is also very obvious. 1. Introduction of flue gas waste heat exchanger The flue gas waste heat exchanger is a device that uses itself to extract and reuse the heat energy carried in the flue gas, meeting the national strategic policy of promoting energy conservation and emission reduction. Compared with the basic boiler heat exchanger, the heat energy is not fully recovered and utilized, which leads to a large amount of waste gas being discharged after supply. This is not only a high cost investment, but also a high environmental pollution. The appearance of flue gas waste heat exchanger makes the waste heat recovery process more effective. As long as the heat energy is below the acid dew point, all the waste heat can be recovered to improve the system process efficiency. 2. Material of flue gas waste heat exchanger The materials used are mostly stainless steel, carbon steel, fluoroplastics and other raw materials. These materials have the same material that is corrosion resistant, can realize the process of recovering low-temperature flue gas, and can withstand high temperatures. The installation shall be carried out according to the specified instructions. The resistance of the above materials is also very small, which can significantly reduce the working pressure and reduce the degree of ash deposition, thus ensuring the normal operation of the heat exchanger.
2022 / 09 / 19
The flue gas waste heat exchanger is a heat exchanger that can re absorb and utilize the heat energy in the high temperature flue gas. Now it is being used in many industries, and the use effect is also very obvious. 1. Introduction of flue gas waste heat exchanger The flue gas waste heat exchanger is a device that uses itself to extract and reuse the heat energy carried in the flue gas, meeting the national strategic policy of promoting energy conservation and emission reduction. Compared with the basic boiler heat exchanger, the heat energy is not fully recovered and utilized, which leads to a large amount of waste gas being discharged after supply. This is not only a high cost investment, but also a high environmental pollution. The appearance of flue gas waste heat exchanger makes the waste heat recovery process more effective. As long as the heat energy is below the acid dew point, all the waste heat can be recovered to improve the system process efficiency. 2. Material of flue gas waste heat exchanger The materials used are mostly stainless steel, carbon steel, fluoroplastics and other raw materials. These materials have the same material that is corrosion resistant, can realize the process of recovering low-temperature flue gas, and can withstand high temperatures. The installation shall be carried out according to the specified instructions. The resistance of the above materials is also very small, which can significantly reduce the working pressure and reduce the degree of ash deposition, thus ensuring the normal operation of the heat exchanger.
2022 / 09 / 16
GL Ⅱ air heat exchanger GL Ⅱ air heat exchanger is used for air conditioning, cooling and dehumidification projects in papermaking, chemical industry, light textile and other enterprises. Due to the small radiator tube and dense fins, the effect is good. GL Ⅱ type air heat exchanger is a steel double loop (two rows) or multi loop (four rows) air heat exchanger for finned tubes Φ 18 * 2mm seamless steel pipe is wound with 10 * 0.3mm folded steel strip, which is in spiral shape. Its sheet spacing is 3.2mm. It can have a variety of surface pipe numbers, pipe lengths, and rows to form a variety of specifications. The inlet and outlet pipes are located on the same side. The working medium heat source is high-temperature water after steam, and the cold source is low-temperature water or salt water. It can be used as an air heater or air cooler. It is a heat exchanger with strong economic durability. U-II air heat exchanger U-II type air heat exchanger is a kind of heat dissipation pipe which is suitable for both steam heating system and hot water heating system. The water inlet and outlet joints are all on the same side, and the water inlet and outlet pipes are connected with U-shaped elbows. In this way, some special requirements for installation are met, that is, one end of the radiator pipe must be against the wall and the other end must be installed on other obstacles. All U-II radiator finned tubes are Φ The 16 * 1mm copper tube is wound with 10 * 0.2mm folded copper tape, which is in a spiral shape. There are 3.2mm - "R", 4.2mm - "M", and 6.5mm - "T" different sheet spacing. The "R" type sheet spacing ha
2022 / 09 / 16
The air heat exchanger (also known as radiator or heat sink) is the main equipment in the heat exchanger that cools or heats air with cold and hot media. The air can be heated by high temperature water, steam or high temperature heat transfer oil, and the air can be cooled by salt water or low temperature water. Therefore, it can be widely used in light industry, construction, machinery, textile, printing and dyeing, electronics, food, starch, medicine, metallurgy, painting and other industries for hot air heating Air conditioning, cooling, condensation, dehumidification, drying, etc. SRZ air heat exchanger SRZ air heat exchanger is an air heater that is applicable to both steam system and hot water system as air heating. It is mainly used for hot air heating, air conditioning system and air heating of drying device. It is the main equipment in hot air device. It is widely used in the heating and ventilation system of current industrial and mining enterprises and large buildings. The radiator uses steam or hot water as the thermal medium. The working pressure of steam is 0.3-16kg/cm2, and the temperature of hot water can be about 130-70 ℃. SRZ type air heat exchanger is mainly composed of three rows of staggered spiral finned tube bundles along the air flow direction. The finned tubes are made of 15 * 0.5mm corrugated steel strip wrapped by 22 * 2mm seamless steel pipe, in a spiral shape. The sheet spacing is 5mm large "D", 6mm medium "Z", and 8mm small "X". SRZ air heat exchanger is characterized by compact structure, beautiful appearance, easy installation, management and durability. It is not only suitable for centralized air supply heating, but also f
The greatest advantage of stainless steel finned tube
2022 / 09 / 14
Stainless steel finned tube uses spiral finned tube as one of the main heat dissipation elements. Its heat dissipation efficiency is high, which is several times or even dozens of times that of ordinary heat dissipation tubes. To a certain extent, it effectively extends its life, reduces its volume and saves materials. The overall rolled finned tube has no contact thermal resistance, good heat transfer performance, high strength, heat shock resistance, mechanical vibration, and good thermal expansion performance. Wuxi McVeigh Equipment Technology Co., Ltd. is a professional manufacturer of finned tubes. It has introduced advanced technology and developed high-efficient and energy-saving laser welded finned tubes, which can be wound into cylindrical, disc and other shapes according to customer requirements. It is a professional manufacturer of various heat exchange equipment, mainly producing laser welded finned tubes, high-frequency welded finned tubes, etc. Laser welded finned tube is a new type, wear-resistant and efficient heat transfer material in the finned tube welding industry. It has the characteristics of high heat transfer efficiency, large heat dissipation area, long service life, high pressure bearing, and compliance with national energy conservation and environmental protection emission standards. It is characterized by high heat exchange efficiency, large heat dissipation area, long service life, wide temperature range, high pressure, and compliance with national energy conservation and environmental protection emission standards.
Simple understanding of finned tube radiator
2022 / 09 / 14
The specific model of finned tube radiator is not fixed. The specific size of finned tube is processed according to the needs of users. The finned tube radiator has excellent pressure bearing capacity. The excellent pressure bearing performance increases the safety and stability of the finned tube radiator. The finned tube radiator is made of steel pipe, and the finned tube is added to the base tube to form a finned tube radiator. The larger the fin, the higher its heat dissipation efficiency, the more heat it emits, and the faster the indoor temperature rises. Finned tube radiator not only has the characteristics of large heat transfer, small temperature difference, small weight, small volume, rapid thermal response, etc. inherent in the heat pipe, but also should not affect the appearance of the room. As required by the service life, the fin radiator shall not be easy to be corroded and damaged, and the service life shall be long. High performance ratio, more durable, small footprint. The heat dissipation area of finned tube radiator can generally reach 100-20000 square meters, which can be used in large-scale heating systems such as workshops and workshops.
High efficiency heat transfer element and manufacturing method of spiral fin tube
2022 / 09 / 07
High efficiency heat transfer element and manufacturing method of spiral fin tube Publisher: admin Click: 2423 Spiral finned tubes are widely used in boiler economizers, heat recovery of preheating boilers, and heat exchange equipment in chemical industry, pressure vessels and other fields. Spiral finned tubes are mainly used in boilers when they are used. The unit capacity has also grown from small to large, and the application is increasing day by day. At present, there are many professional manufacturers in China that can produce high-frequency welding and brazing spiral fin tubes, and the quality of fin tube production equipment and technology has reached the requirements of foreign standards from introduction, digestion and absorption to self-development, design and manufacturing. Advantages of spiral fin tube 1. The effective space of the spiral fin tube increases the heat exchange area, effectively improving the heat transfer effect. 2. The spiral finned tube reduces the occupied space of the heat transfer surface to a certain extent, so that its volume can be reduced. It is very suitable for fast loading boilers when used. 3. The spiral fin tube can effectively reduce the cost of its equipment and effectively improve the safety of its equipment to a certain extent. 4. The operation cost of the spiral finned tube will be reduced due to the reduction of the pressure drop at the water side.
How to use air heat exchanger correctly
2022 / 09 / 06
Although an air heat exchanger is literally similar to an air heat exchanger, it is not the same as an air heat exchanger. Therefore, in order not to confuse the two, the following editor will briefly introduce some basic knowledge of air heat exchangers, the details are as follows. 1. Installation of air heat exchanger (1) Check the structure of the equipment to see if it is intact, and carry out a pressure test to check if there are any problems. (2) The heat exchanger can be installed vertically or horizontally, you can choose. The inlet and outlet flanges can be on the same side or on both sides, but no matter which type, the height from the ground should not be less than 300mm. (3) If it is used for heating, the outer side should be insulated to reduce heat loss. 2. Use of air heat exchangers (1) If the medium is steam, overpressure is strictly prohibited. (2) When heating, it should be heated and pressurized slowly, and it will be officially started after 5 to 10 minutes. When shutting down, stop the heating first, and the liquid in the heat exchanger should be drained cleanly, and there should be no accumulation. (3) If it is cooling, then stop the cooling before shutting down. 3. Maintenance of air heat exchanger (1) If the heat exchanger is not used for a long time, the interna
Vibration problems and main measures of air heat exchanger
2022 / 09 / 06
The air heat exchanger is prone to vibration problems during operation, and the root of the problem mainly lies in the design of the equipment. In the design of the equipment, the operation vibration shall be considered. To avoid vibration, it is necessary to reasonably select the air flow velocity or add anti vibration plates along the air flow direction. Another common problem of the equipment is ash blocking. When it is working, it comes into contact with the boiler flue gas discharge and the dust whose type is composed of particles, and the dust will accumulate for a long time to form ash blockage. Other common problems are the noise and air leakage of the air heat exchanger. The equipment also plays a role in dealing with vibration problems and diaphragm vibration control, reducing and eliminating noise problems of the equipment, and air leakage problems of the equipment. It is necessary to seal the equipment from design and operation. Main measures for preventing and reducing low temperature corrosion of air heat exchanger: 1. The reduction of sulfur trioxide not only reduces the temperature, but also reduces the condensation of acid, reduces corrosion, desulfurized fuel, low oxygen combustion, and additives. 2. Increase the cold end wall temperature of the equipment, the wall temperature should be higher than the flue gas temperature, and the acid should be at least higher than the wall temperature, so that the corrosion speed is faster. After the implementation method of hot air circulation, warm wind turbines are added. a. The purpose of using hot air re
What is laser welded finned tube
2022 / 09 / 05
Product introduction Fin tube is also called heat dissipation tube, which is divided into single metal fin tube and double metal fin tube. Single metal finned tube is made of aluminum tube rolled as a whole, which is called aluminum rolled finned tube. It has no contact thermal resistance, high strength, heat resistance, mechanical vibration, good thermal expansion performance, and considerable extended heat exchange surface. The heat exchanger made of this kind of fin tube has a better effect than the tandem or wound fin heat exchanger, and is a heat exchanger with a wide range of uses. The single metal fin tube can also be directly rolled from steel pipe or rolled from copper pipe. Bimetal composite fin tubes are divided into steel aluminum composite fin tubes and copper aluminum composite fin tubes. The steel aluminum composite finned tube is made of (steel pipe, aluminum pipe; or stainless steel pipe, aluminum pipe) and then rolled into fins. The copper aluminum composite finned tube is made of (copper pipe, aluminum pipe) and then rolled into fins. It has the advantages of tight bonding, small thermal resistance, good heat transfer performance, high strength, small flow loss, strong corrosion resistance, not easy to deform under long-term cold and hot conditions, and long service life. The integrally rolled fins are free of burr and wrinkle, easy to clean, easy to remove condensation water on the outer surface of fins during wet cooling in heating and air conditioning projects, and difficult to form dust and scale in drying, heating and other heat exchange occasions.
What Factors Do Finned Tubes Need To Master
2022 / 09 / 05
What factors do finned tubes need to master? Although it is said that with the laser welding of stainless steel finned tubes, people need not worry too much about heating factors, but they still need to master some factors in order to use them better. Many users will feel that the room temperature is still not up to standard after the steel plate radiator is installed, which is a concern of many winter heating users. So what factors will affect the indoor heating temperature? 1. Do not install heating hood during decoration, so as not to affect the heat dissipation effect of heating. If the heating hood has been installed but can not be removed, it is necessary to open the cooling hood. If opening will affect the beauty, you can flip the cooling hood and let the louver net face up to use, so that the heat inside the heating hood can be radiated. 2. The lack of heat at the initial stage of heating is mostly caused by air blockage, because at the beginning of heating, the pipeline is actually a mixture of water and air, and incomplete air discharge will cause air blockage and affect water circulation. Citizens should pay attention to heating in time. 3. Ventilation should be ensured 2 to 3 times a day, 5 to 10 minutes each time. All doors and windows should be opened during ventilation to achieve air exchange in a short time. If the windows are half opened for a long time, not only the ventilation effect of finned tubes is not obvious, but also the heat will be lost. Especially when the radiators are under the windows, this waste will be more serious. 4. Generally speaking, when the temperature is the same, humid air i
Overview Of Waste Heat Recovery Heat Exchanger
2022 / 08 / 30
Flue gas is the main way for general energy consuming equipment to waste energy. For example, the energy consumption of boiler exhaust gas is about 15%, while the main energy consumption of other equipment such as setting machine, dryer and kiln in the printing and dyeing industry is discharged through flue gas. The waste heat recovery of flue gas is mainly to convert the heat carried by flue gas into usable heat through some heat exchange method. The main waste heat recovery methods are: flue gas waste heat recovery hot water, flue gas waste heat recovery air. Here, we will focus on the hot water recovered from flue gas waste heat. The heat exchange element in the flue gas waste heat recovery hot water heat exchanger is a high-frequency welded finned tube. The finned tube welded by high-frequency resistance reduces the heat transfer resistance and is resistant to high temperature. In order to prevent ash blockage and corrosion, the flue gas temperature at the outlet of the waste heat recovery device is generally controlled above the dew point, that is, the exhaust gas temperature of the oil and coal-fired boiler is ≮ 130 ℃, the exhaust gas temperature of the gas-fired boiler is ≮ 100 ℃, and the fuel is saved by 4-18%.
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