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Overview Of Copper Aluminum Composite Finned Tubes
2022 / 08 / 30
The processing technology of copper aluminum composite finned tube is that aluminum tube and copper tube are first processed into bimetallic composite tube, and then mechanically cold-rolled. By using the physical characteristics of aluminum tube, the finned tube with copper tube as the core and cold-rolled aluminum fin is made into one. Copper aluminum composite finned tube radiator is widely used in heating and air conditioning projects. It is easy to remove the condensation water on the outer surface of the fins during wet cooling, and it is not easy to form dust and scale in dry heating and other heat exchange occasions. 2. Characteristics of copper aluminum composite finned tube: 1. It has tight combination, small thermal resistance and good heat transfer performance; 2. High strength and small flow loss; 3. Strong corrosion resistance, not easy to deform under long-term cold and thermal conditions, and long service life
GL Finned Tube Radiator Overview
2022 / 08 / 30
1. GL finned tube radiator is made of seamless steel tube rolled aluminum fins with advanced technology and high heat transfer performance, and is supported by steel perforated plate frame Composed of composite fin tubes; 2. GL finned tube radiator is widely used in large and medium-sized heat exchanger systems such as air heating, cooling and waste heat recovery; 3. Working medium in heat exchange of finned tube radiator: steam (≤ 1.6Mpa), hot water (≤ 130 ℃); 4. Description of model and specification of GL fin tube radiator: GL ① × ②-③ ① ② - the length and width of the radiator are rounded in decimeters ③ - indicates the number of rows of cooling tubes
2022 / 08 / 26
A new way to enhance heat transfer of finned tubes of air cooler is described. The structure, manufacturing process and heat transfer performance of various new finned tubes are introduced. At the same time, the heat transfer and friction resistance of the representative new finned tube are compared with the traditional flat finned tube, and the corresponding heat transfer coefficient curve, flow resistance coefficient curve and experimental formula are given. Research shows. The heat transfer effect of the finned tubes of the air cooler is significantly improved after the heat transfer enhancement. It is pointed out that comprehensive factors should be taken into consideration when manufacturing and selecting the finned tubes of the new air cooler. Although the performance of using air as the coolant is worse, as long as the appropriate air cooler is selected and the inexhaustible air is used as the cooling medium, it is a significant energy-saving device compared with the water cooler, and at the same time, it also avoids the sensitive water pollution and ecological balance damage.
Why is the spiral plate heat exchanger blocked
2022 / 08 / 26
The common problem of spiral plate heat exchanger in the market is the blockage problem, which is difficult to be solved by both the manufacturer and the user. There are many impurities in the materials used by some manufacturers, and the pipe wall space of the equipment is relatively small, which is easy to be blocked during the import and export. Once the equipment is blocked, it needs to be stopped for maintenance and cleaning, which will affect the normal production process. In the actual production process, we found that in addition to impurities or coking, the main problem of blockage is solidification, which is a physical phenomenon. In the production process, it is not convenient for us to add other chemical cleaning agents. To solve the problem of blockage of spiral plate heat exchanger in the production process, we must improve the production process, and only find ways to work hard in the cleaning process. In the past, it was difficult to clean the spiral plate heat exchanger, the structure was too compact, and the tools were not very convenient to use. The detachable equipment developed now is easy to clean and has no difference in all parameters from the non detachable equipment. At present, this detachable technology has not been popularized, and many manufacturers do not know that there is such a way. However, as long as customers who encounter congestion problems can use this equipment to solve the problems, because it can solve the problems for customers
What are the advantages of finned tube heater
2022 / 08 / 26
The finned tube heater is the main equipment in the heat exchange device that cools or heats air with cold and hot media. The air can be heated by passing steam or high-temperature heat transfer oil, and the air can be cooled by passing low-temperature water. Purpose: It can be widely used in hot air heating, cooling, dehumidification, drying and other projects in light industry, construction, chemical industry, machinery, textile, printing and dyeing, electronics, food, medicine, metallurgical coating and other industries. What are the advantages of finned tube heater The finned tube heater is the main equipment in the heat exchange device that cools or heats air with cold and hot media. The air can be heated by passing steam or high-temperature heat transfer oil, and the air can be cooled by passing low-temperature water. Application: it can be widely used in hot air heating, cooling, dehumidification, drying and other projects in light industry, construction, chemical industry, machinery, textile, printing and dyeing, electronics, food, medicine, metallurgical coating and other industries.
Steel aluminum composite fin tube industrial aluminum radiator manufacturer
2022 / 08 / 23
Steel aluminum composite fin tube industrial aluminum radiator manufacturer The structure of the industrial radiator is composed of a heat pipe, an inlet and outlet header pipe and a frame. Among them, the heat dissipation row tube is composed of heat dissipation tube bundle, and the heat dissipation tube is composed of base tube and fins. The quality of the heat pipe determines the heat exchange effect, the arrangement of the heat pipe affects the air resistance, and the installation mode of the heat pipe determines the ability to withstand the temperature difference (thermal expansion and cold contraction).
Steel aluminum composite fin tube industrial aluminum radiator manufacturer
2022 / 08 / 23
Steel aluminum composite fin tube industrial aluminum radiator manufacturer The structure of the industrial radiator is composed of a heat pipe, an inlet and outlet header pipe and a frame. Among them, the heat dissipation row tube is composed of heat dissipation tube bundle, and the heat dissipation tube is composed of base tube and fins. The quality of the heat pipe determines the heat exchange effect, the arrangement of the heat pipe affects the air resistance, and the installation mode of the heat pipe determines the ability to withstand the temperature difference (thermal expansion and cold contraction).
Steel aluminum composite fin tube industrial aluminum radiator manufacturer
2022 / 08 / 23
Steel aluminum composite fin tube industrial aluminum radiator manufacturer The structure of the industrial radiator is composed of a heat pipe, an inlet and outlet header pipe and a frame. Among them, the heat dissipation row tube is composed of heat dissipation tube bundle, and the heat dissipation tube is composed of base tube and fins. The quality of the heat pipe determines the heat exchange effect, the arrangement of the heat pipe affects the air resistance, and the installation mode of the heat pipe determines the ability to withstand the temperature difference (thermal expansion and cold contraction).
Steel aluminum composite fin tube industrial aluminum radiator manufacturer
2022 / 08 / 23
Steel aluminum composite fin tube industrial aluminum radiator manufacturer The structure of the industrial radiator is composed of a heat pipe, an inlet and outlet header pipe and a frame. Among them, the heat dissipation row tube is composed of heat dissipation tube bundle, and the heat dissipation tube is composed of base tube and fins. The quality of the heat pipe determines the heat exchange effect, the arrangement of the heat pipe affects the air resistance, and the installation mode of the heat pipe determines the ability to withstand the temperature difference (thermal expansion and cold contraction).
What should we do if the heat exchanger fails?
2022 / 08 / 23
In the production process, due to the heat exchanger tubesheet being eroded by water, cavitation and corrosion of trace chemical media, leakage often occurs at the tubesheet welds, resulting in the mixing of water and chemical materials, and the production process temperature is difficult to control, resulting in the generation of other products, seriously affecting the product quality and reducing the product grade. After the leakage of the condenser tube plate weld, the enterprise usually uses the traditional repair welding method to repair. The internal stress in the tube plate is easy to be generated and difficult to eliminate, resulting in the leakage of other heat exchangers. The enterprise inspects the repair of the equipment by pressing, and repeatedly repairs welding and experiments. It takes 3 to 5 people to complete the repair. After several months of use, the tube plate weld again appears corrosion, which brings waste of human, material and financial resources to the enterprise, An increase in production costs. Through the corrosion resistance and erosion resistance of fushilan polymer composite material and the protection of the new heat exchanger in advance, the problems of welds and sand holes in the new heat exchanger are not only effectively solved, but also the corrosion of the metal surface and welding points of the heat exchanger by chemical substances after use is avoided. During the regular maintenance in the future, the fushilan polymer composite material can also be applied to protect the exposed metal; Even if there is leakage after use, it can be repaired in time by fushilan technology, so as to avoid the influence of long-time surfacing maintenance on production. It is precisely because
About finned tube heat exchanger
2022 / 08 / 19
Finned tube radiator is the most widely used heat exchanger in gas and liquid heat exchanger. It can enhance heat transfer by adding fins on common base tubes. The base pipe can be steel pipe; Stainless steel pipe; Copper pipe, etc. The fins can also be made of steel strip; Stainless steel belt, copper belt, aluminum belt, etc. Finned heat exchanger is mainly used for air heating in the drying system. It is the main equipment in the hot air device. The heat medium used by the radiator can be steam or hot water or heat transfer oil. The working pressure of steam is generally not more than 0.8MPa, and the temperature of hot air is below 150 ℃. It is mainly composed of three rows of parallel spiral finned tube bundles between the air flow directions. The processing technology of SRZ type heat dissipation finned tube bundle is that the reverse 0.5 * 10 mm steel strip is mechanically wound on the 18 mm seamless steel tube, and then hot galvanized. It can also be made of stainless steel tube and stainless steel strip for all stainless steel heat dissipation. The SRL type radiator is a finned radiator rolled with steel tube and aluminum strip, and its heat dissipation area per unit length is larger than that of SRZ type. Semem finned heat exchanger adopts mechanical winding. The contact surface between the cooling fin and the cooling pipe is large and tight, and the heat transfer performance is good and stable. The air passing resistance is small. The steam or hot water flows through the steel pipe, and the heat is transferred to the air passing through the fins through the fins tightly wound on the steel pipe, so as to heat and cool the air.
Heat transfer capacity and component function of heat exchanger
2022 / 08 / 16
When the heat exchanger is manufactured, it is mainly made of two coils, which will directly form two uniform spiral channels. During operation, the two heat transfer media can conduct full countercurrent flow, greatly enhancing the heat exchange effect. Even if the two small temperature difference media can achieve the ideal heat exchange effect. The connecting pipe of the heat exchanger on the shell is mainly of tangential structure, with small local resistance during operation. Since the curvature of the spiral channel is uniform, the liquid flow in the equipment has no large turning, and the total resistance is small. Therefore, the design flow rate can be improved to have high heat transfer capacity. When a single heat exchanger cannot meet the use requirements, multiple heat exchangers can be combined, but the combination must meet the following requirements: parallel combination, series combination, equipment and channel spacing are the same. Hybrid combination: one channel in parallel and one channel in series. Component function of heat exchanger 1. Fixed pressing plate: it is not in contact with the fluid and is sealed by pressing gasket after being fastened with clamping bolts. 2. Heat exchange gasket: provide medium flow channel and heat exchange surface. 3. Sealing gasket: prevent fluid synthesis or leakage and distribute it between different plates. 4. Nozzle and flange: provide inlet and outlet for fluid. 5. Upper and lower guide rods: bear the weight of the plates and install the dimensions to make the plates slide between
2022 / 08 / 19
The test data shows that the hot air recirculation will raise the temperature of the cooling air at the inlet and outlet of the fan. It is suggested that the temperature measurement point should be away from the air cooling platform, that is, the cooling air temperature should be measured away from the inlet and outlet of the fan, so as to obtain an objective and fair evaluation conclusion. On the other hand, it is recommended that the ambient wind speed measuring point be placed on the top of the boiler and then converted to the required height, so as to avoid the interference of other buildings on the flow field at the measuring point. Finned tube bundle is the heat dissipation element of air cooler condenser, and its heat transfer performance has the most direct impact on the condensing capacity of air cooler. According to the operation experience, the deposition of dirt on the air side will significantly reduce the heat exchange capacity of the finned tube bundle.
2022 / 08 / 19
The test data shows that the hot air recirculation will raise the temperature of the cooling air at the inlet and outlet of the fan. It is suggested that the temperature measurement point should be away from the air cooling platform, that is, the cooling air temperature should be measured away from the inlet and outlet of the fan, so as to obtain an objective and fair evaluation conclusion. On the other hand, it is recommended that the ambient wind speed measuring point be placed on the top of the boiler and then converted to the required height, so as to avoid the interference of other buildings on the flow field at the measuring point. Finned tube bundle is the heat dissipation element of air cooler condenser, and its heat transfer performance has the most direct impact on the condensing capacity of air cooler. According to the operation experience, the deposition of dirt on the air side will significantly reduce the heat exchange capacity of the finned tube bundle.
About laser welding finned tubes
2022 / 08 / 16
There are many kinds of laser welded finned tubes in use. In operation, high-frequency welded finned tubes are mainly used. Although it is more advanced in product quality and production automation compared with inlay and brazing methods, it is difficult to weld the root of high-frequency welded finned tubes and there are wrinkles at the root, resulting in many shortcomings in heat exchange efficiency and convenient ash deposition prevention. In view of the above reasons and in response to the guidelines and policies on energy conservation and emission reduction. Technology of laser welding finned tube 1. The thickness of the base tube of the laser welded fin tube can be 0.8-1.5 mm, and the thickness of the fin can be 0.3-1 mm, which greatly saves the material cost compared with other processes. 2. High penetration rate can prevent gap corrosion, prolong service life and reduce heat transfer resistance. 3. Break through the material limit and use different materials for processing. 4. It is easy for secondary processing and can be directly used for coil and elbow. 5. The welding heat affected zone is small and the metallographic change is small, which makes the processing of small diameter finned tube possible. The materials of heat exchange tubes and condensing tubes shall have heat transfer performance, good corrosion resistance, erosion resistance and abrasion resistance, and good strength, rigidity and plasticit
Advanced manufacturing technology of steel aluminum composite finned tube
2022 / 08 / 15
The steel aluminum composite fin tube is composed of composite aluminum fins outside the steel pipe. The fin thickness is 0.4 mm, with high heat dissipation efficiency and no falling off. The pipe diameter can be made according to customer requirements, from 16 to 32. The manufacturing process of steel aluminum composite finned tube is advanced. It is made by rolling steel and aluminum tubes on a special machine tool, so that the steel base tube and aluminum fins are closely combined. It has the advantages of small thermal resistance, good heat transfer performance, high strength, small flow loss, strong corrosion resistance and long service life. The heat transfer performance of finned tube radiator decays with the extension of service time. During the installation and commissioning of finned tube radiator, the design effect was not achieved, and the pipeline stroke connection was correct, and the insulation measures were ideal. The flow on the hot side of the pipe is too low, and the main symptom is the large temperature difference between the inlet and outlet of the hot side. Check whether the dirt in the pipe is serious. The thermal resistance of 1mm dirt is ≈ 50mm steel plate. Check whether the fins are collapsed or loose, especially the steel tube aluminum wound finned tube. Clean the dust or dust on the fin surface in time. Remove the excess gas in the pipe to ensure the normal operation of the drain valve. If it is not the installation reason, it cannot be ruled out that it is the design and manufacturing reason of finned tube radiator.
Heat transfer efficiency of spiral finned tubes
2022 / 08 / 15
The higher the heat transfer value of the spiral finned tube is required for the thermal performance, the better the heat dissipation performance of the equipment. In this way, the heat dissipation capacity of the product can be effectively improved. The heat transfer coefficient of the equipment can be increased by increasing the heat dissipation area of the outer wall to improve the flow speed of the surrounding air. The installation of spiral finned tubes is relatively simple. The length of finned tubes in the equipment can reach about 6 meters. During the installation, the connection points can be reduced, so that the installation will become faster and more economical, and the probability of water leakage can be greatly reduced. The scope of application of the spiral finned tube is also relatively wide. The most important thing is that it can withstand relatively high pressure to a certain extent. Therefore, the spiral finned tube has a longer service life. The spiral finned tube uses high-frequency power as the main heat source.
What are the advantages of finned tube heater
2022 / 08 / 12
The finned tube heater is the main equipment in the heat exchange device that cools or heats air with cold and hot media. The air can be heated by passing steam or high-temperature heat transfer oil, and the air can be cooled by passing low-temperature water. Purpose: It can be widely used in hot air heating, cooling, dehumidification, drying and other projects in light industry, construction, chemical industry, machinery, textile, printing and dyeing, electronics, food, medicine, metallurgical coating and other industries. What are the advantages of finned tube heater The finned tube heater is the main equipment in the heat exchange device that cools or heats air with cold and hot media. The air can be heated by passing steam or high-temperature heat transfer oil, and the air can be cooled by passing low-temperature water. Application: it can be widely used in hot air heating, cooling, dehumidification, drying and other projects in light industry, construction, chemical industry, machinery, textile, printing and dyeing, electronics, food, medicine, metallurgical coating and other industries.
Operating procedures and scale positions of spiral finned tubes
2022 / 08 / 05
During the operation of spiral finned tubes, it is necessary to regularly check whether each finned tube is perfect and whether there are deposits, coking, rust layer and other scales attached during use, and clean them immediately. At the same time, it is also necessary to check whether the adhesion between each fin tube and the rubber gasket is tight and whether the rubber gasket itself is intact to avoid leakage caused by rubber gasket degumming and damage. The compression nut and upper and lower guide rods of the plate heat exchanger shall be lubricated with lubricating grease frequently. To a certain extent, each instrument adjustment of spiral finned tube should be in the charge of a special person, and the operation and maintenance should be carried out in strict accordance with the operating procedures When it is necessary to replace the rubber gasket or repair the degummed part of the spiral finned tube in use, the finned tube shall be removed and placed on the table, the old gasket shall be removed, or the glue residue in the groove of the finned tube shall be wiped off with fine sandpaper at the degumming place, and then the oil stain in the groove shall be wiped off with carbon tetrachloride or trichloroethylene, and then the back of the new rubber gasket shall be wiped with fine sandpaper, Also wipe off the oil stain with carbon tetrachloride or trichloroethylene solvent. Then apply a thin layer of glue on the back of the groove and the rubber washer, wait a little dry, and take it as the degree that it does not stick to the fingers, but it is still sticky, that is, insert the rubber washer into the groove, flatten it around, apply a layer of talcum powder, and then install the finned tube on the equipment frame and clamp it gently. According to the requirements of the glue manual, it can be put into use after a period
Heat transfer capacity and component functions of heat exchanger
2022 / 08 / 04
When making the heat exchanger, it is mainly made of two coils, which will directly form two uniform spiral channels. During operation, the two heat transfer media can flow in full countercurrent, which greatly enhances the heat exchange effect. Even two kinds of medium with small temperature difference can achieve the ideal heat exchange effect. The connecting pipe of the heat exchanger on the shell mainly adopts the tangential structure, and the local resistance is small during operation. During use, because the curvature of the spiral channel is uniform, the liquid flow in the equipment has no big steering, and the total resistance is small, so the design flow rate can be improved to have a higher heat transfer capacity. When a single heat exchanger cannot meet the use requirements, multiple heat exchangers can be used in combination, but the combination must meet the following requirements: parallel combination, series combination, and the spacing between equipment and channels is the same. Hybrid combination: one channel in parallel and one channel in series. Component functions of heat exchanger 1. Fix the pressing plate: it is not in contact with the fluid. Tighten it with clamping bolts and then compress the gasket for sealing. 2. Heat exchange gasket: provide medium flow passage and heat exchange surface. 3. Sealing gasket: prevent fluid synthesis or leakage, and distribute it between different plates. 4. Nozzle and flange: provide inlet and outlet for fluid. 5. Upper and lower guide rods: bear the weight of the plates and instal
About laser welding finned tubes
2022 / 08 / 02
Finned tubes, also known as heat dissipation tubes, are divided into single metal finned tubes and bimetallic finned tubes. Single metal finned tube is rolled from aluminum tube as a whole, which is called aluminum rolled finned tube. It has no contact thermal resistance, high strength, heat resistance and mechanical vibration, good thermal expansion performance, and considerable extended heat exchange surface. The heat exchanger made of this kind of fin tube is a kind of heat exchanger with a wide range of applications, which has a better effect than the series or wound fin heat exchanger. Single metal finned tubes can also be directly rolled from steel tubes or copper tubes. Bimetallic composite finned tubes are divided into steel aluminum composite finned tubes and copper aluminum composite finned tubes. The steel aluminum composite finned tube is made of (steel tube, aluminum tube; or stainless steel tube, aluminum tube) and then rolled out of fins. The copper aluminum composite finned tube is made of (copper tube, aluminum tube) and then rolled out of fins. It has the advantages of tight combination, 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 working conditions, and long service life. The integrally rolled fins are free of burrs and folds, easy to clean, easy to remove condensate on the surface of fins during wet cooling in heating and air conditioning projects, and not easy to form dust and scale in drying, heating and other heat exchange occasions.
The structure of the finned tube
2022 / 07 / 25
The new ways of enhancing heat transfer of air cooler finned tubes are expounded, and the structure, manufacturing process and heat transfer performance of various new finned tubes are introduced. At the same time, the heat transfer and friction resistance performance of the representative new finned tube is compared with the traditional straight finned tube, and the corresponding heat transfer coefficient curve, flow resistance coefficient curve and experimental formula are given. research shows. The heat transfer effect of the air cooler finned tube is significantly improved after the heat transfer enhancement is carried out. It is pointed out that comprehensive factors need to be considered in the manufacture and selection of new-type air cooler finned tubes. Although the performance of using air as a coolant is worse, as long as a suitable air cooler is selected and the inexhaustible air is used as a cooling medium, it is a significant energy-saving device compared with a water cooler, and it also avoids the sensitivity of water pollution and damage to the ecological balance.
Maintenance and use requirements of steam radiators
2022 / 07 / 25
In the process of maintenance and maintenance, the steam radiator needs to effectively keep the surface of its heat dissipation clean. Compressed air can be used for cleaning during use. The heat medium of the steam radiator is water when it is running, and the water passes through It is softened, which will reduce the generation of limescale. After the steam radiator has been in operation for 2 to 3 years, it is necessary to effectively clean the inner cavity of the radiator during use. During the cleaning process, chemical methods can be used to remove the scale in the radiator. When the equipment is not working, its inner cavity It should be filled with water to reduce internal cavity corrosion. When the fins of the steam radiator are knocked crooked during operation, they can be straightened by hand to prevent the increase of ventilation resistance. The quality of the connection between the pipes in the equipment and the tightness of each part should be adjusted in time during use. The flexibility of the device, etc., should be checked frequently. In order to effectively prolong the service life of the steam radiator, the blockage in the pipe can be removed with clean water or chemical methods after three months of normal use, which can aggravate the local corrosion in the equipment to a certain extent. improve its use efficiency. In winter, when the steam radiator is not in use, it is necessary to drain all the water in time, which can effectively prevent the finned tubes from freezing and cracking to a certain extent. The steam radiator is also a heat exchanger, which is a hot and cold fluid. equipment for heat exchange. The steam radiator needs to effectively keep its steam radiator pipe network clean during use. Whether it
Several principles to understand the principle of finned tubes
2022 / 07 / 25
After understanding several principles and functions of the principle of finned tubes, when to choose finned tubes, there are the following principles: (1) If the heat transfer coefficients on both sides of the tube are very different, fins should be installed on the side with the smaller heat transfer coefficient. Example 1: Boiler economizer, water runs in the tube, flue gas flows out of the tube, and fins should be used on the flue gas side. Example 2: For an air cooler, the liquid flows in the tube and the air flows out of the tube, and the fins should be added on the air side. Example 3: For a steam generator, water boils in the tube, and flue gas goes outside the tube, and fins should be added to the flue gas side. It should be noted that in the design, the side with the small heat transfer coefficient should be placed outside the tube to facilitate the installation of fins. (2) If the heat transfer coefficient on both sides of the tube is very small, in order to strengthen the heat transfer, fins should be installed on both sides at the same time. In this case, if fins are only added on one side, the increase in heat transfer will not have a significant effect. Example 1: In a traditional tubular air preheater, the air flows inside the tube and the flue gas flows outside the tube. Because it is gas-to-gas heat transfer, the heat transfer coefficients on both sides are very low, and it is very difficult to add fins to the tube, so
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Privacy statement: Your privacy is very important to Us. Our company promises not to disclose your personal information to any external company with out your explicit permission.