Full-laser welding bulging long plate heat exchanger for high-salt dust working condition and process

Abstract

The full-laser welding bulging long plate heat exchanger for the high-salt dust working condition comprises a heat exchanger body, and the heat exchanger body comprises fixed supporting plate ground feet, fixed supporting plates, fastening semicircular groove holes, tail supporting stand columns, tail supporting beams, supporting top beams, guide rail beams and supporting rods; the tail supporting stand columns are fixedly arranged on the fixed supporting plate ground feet, the multiple sets of fixed supporting plate ground feet are arranged, the fixed supporting plate is fixedly arranged on the multiple sets of fixed supporting plate ground feet, multiple sets of fastening semicircular groove holes are formed in the two sides of the upper edge of the fixed supporting plate, the tail supporting beams are fixedly arranged on the tail supporting stand columns, and the two sets of guide rail beams are oppositely arranged up and down. According to the heat exchanger, the pressure resistance of the heat exchanger can be effectively improved, in a high-salt flue gas environment, leakage caused by corrosion of the sealing ring is reduced, the welding compactness is improved, blockage caused by high-salt dust residues is reduced, the cleaning difficulty is reduced, the dismounting and cleaning difficulty is reduced, and the labor intensity is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of heat exchangers, and in particular to a full laser welded bulging long plate heat exchanger and a process for high-salt dust working conditions. Background Art

[0002] Plate heat exchanger is a kind of high-efficiency heat exchanger made of a series of metal sheets with certain corrugated shapes. Thin rectangular channels are formed between various plates, and heat is exchanged through the plates. Plate heat exchanger is an ideal equipment for liquid-liquid and liquid-steam heat exchange. It has the characteristics of high heat exchange efficiency, small heat loss, compact and light structure, small footprint, wide application and long service life. Under the same pressure loss, its heat transfer coefficient is 3-5 times higher than that of tubular heat exchanger, and the footprint is one-third of that of tubular heat exchanger, and the heat recovery rate can be as high as more than 90%.

[0003] There are two main types of plate heat exchangers: frame type (detachable type) and brazing type. There are three main types of plates: herringbone corrugated plate, horizontal straight corrugated plate and tumor-shaped plate.

[0004] Compared with shell and tube heat exchangers, plate heat exchangers have a higher heat transfer coefficient. Because different corrugated plates are inverted to form complex flow channels, the fluid flows in a rotating three-dimensional manner in the flow channels between the corrugated plates, and turbulence can be generated at a lower Reynolds number, so the heat transfer coefficient is high, which is generally considered to be 3 to 5 times that of shell and tube heat exchangers. The logarithmic mean temperature difference is large, and the terminal temperature difference is small. In a shell and tube heat exchanger, the two fluids flow in the tube side and the shell side respectively, and the flow is generally cross-current, and the correction coefficient of the logarithmic mean temperature difference is small. Plate heat exchangers are mostly parallel or countercurrent flow modes, and their correction coefficients are usually around 0.95. In addition, the flow of cold and hot fluids in the plate heat exchanger is parallel to the heat exchange surface and there is no bypass flow, so the terminal temperature difference of the plate heat exchanger is small, and the heat exchange of water can be less than 1°C, while the shell and tube heat exchanger is generally 5°C. Small footprint. The plate heat exchanger has a compact structure, and the heat exchange area per unit volume is 2 to 5 times that of the shell and tube type. Unlike the shell and tube type, there is no need to reserve a place for the inspection and maintenance of the tube bundle. Therefore, to achieve the same heat exchange, the plate heat exchanger occupies an area of ​​about 1 / 5 to 1 / 8 of the shell and tube type. It is easy to change the heat exchange area or process combination; as long as a few plates are added or reduced, the purpose of increasing or reducing the heat exchange area can be achieved; by changing the arrangement of the plates or replacing a few plates, the required process combination can be achieved to adapt to the new heat exchange conditions, while the heat transfer area of ​​the shell and tube heat exchanger is almost impossible to increase. Low price: using the same material, under the same heat exchange area, the price of the plate heat exchanger is about 40% to 60% lower than that of the shell and tube type. Easy to make: the heat transfer plate of the plate heat exchanger is stamped, with a high degree of standardization and can be mass-produced, while the shell and tube heat exchanger is generally made by hand. Easy to clean: For frame-type plate heat exchangers, just loosen the compression bolts to loosen the plate bundle and remove the plates for mechanical cleaning, which is very convenient for heat exchange processes that require frequent cleaning of equipment. Small heat loss: For plate heat exchangers, only the outer shell of the heat transfer plate is exposed to the atmosphere, so the heat dissipation loss can be ignored and no insulation measures are required. However, shell and tube heat exchangers have large heat losses and require insulation layers. Small capacity: about 10%~20% of shell and tube heat exchangers. Large pressure loss per unit length: due to the small gap between the heat transfer surfaces and the unevenness on the heat transfer surfaces, the pressure loss is greater than that of traditional smooth tubes. Not easy to scale: due to sufficient internal turbulence, it is not easy to scale, and its scaling coefficient is only 1 / 3~1 / 10 of that of shell and tube heat exchangers. The working pressure of the plate radiator should not be too high, otherwise leakage may occur; the plate heat exchanger is sealed with a gasket, and the working pressure should generally not exceed 2.5MPa, and the medium temperature should be below 250℃, otherwise leakage may occur. Easy to clog; because the channel between the plates is very narrow, generally only 2~5mm, when the heat exchange medium contains large particles or fibrous substances, it is easy to clog the channel between the plates.

[0005] The current plate heat exchanger is difficult to use in flue gas recovery of high-salt dust because it is not easy to clean. The existing ones are all multi-pass on the cold side and hot side, and only one pass on the hot side and cold side; the flow direction between the cold and hot fluids in each pass is perpendicular to each other and cross-flow; For example, the application number 202011561502.3 discloses a corrosion-resistant flue gas plate heat exchanger, which relates to the technical field of plate heat exchangers, and includes a frame, a shell and a heat exchange module, wherein the shell is mounted on the frame, the heat exchange module is mounted inside the shell, and the heat exchange module is made of corrosion-resistant material; a flue gas inlet pipe is connected to the top of the shell, a flue gas outlet pipe is connected to the bottom of the shell, and the flue gas inlet pipe and the flue gas outlet pipe are connected to the hot medium channel of the heat exchange module; a clean gas inlet pipe is connected to one side wall of the shell, and a clean gas outlet pipe is connected to the side of the shell away from the clean gas inlet pipe, and the clean gas inlet pipe and the clean gas outlet pipe are connected to the cold medium channel of the heat exchange module; a rapping assembly is connected to the frame, and the rapping assembly rapping the shell is arranged. The present application has the effect of shaking off dust and granular impurities adhering to the heat exchange module during flue gas heat exchange, thereby reducing the occurrence of scaling in the heat exchange module.

[0006] However, most of the current plate heat exchangers cannot bear high-pressure media. In high-salt flue gas environments, the sealing rings are prone to corrosion and leakage. Conventional welding is prone to cracking, the welding density is poor, and high-salt dust residue causes blockage. It is difficult to clean and dismantle, and the labor intensity is high. The assembly extrusion force is uneven, which is easy to cause leakage. Summary of the invention

[0007] The technical problem to be solved by the present invention is to improve the pressure resistance of the heat exchanger, reduce the leakage caused by corrosion of the sealing ring in a high-salt flue gas environment, improve the welding density, reduce the blockage caused by high-salt dust residue, reduce the difficulty of cleaning, reduce the difficulty of dismantling and cleaning, and reduce labor intensity. Alleviate the problem of leakage caused by uneven assembly extrusion force.

[0008] In order to solve the above technical problems, the present invention provides a full laser welded bulging long plate heat exchanger for high-salt dust working conditions, including a heat exchanger body, the heat exchanger body including a fixed support plate foot, a fixed support plate, a fastening semicircular slot hole, a tail support column, a tail support beam, a support top beam, a guide rail beam, and a support rod; the fixed support plate foot is provided with multiple groups, the fixed support plate is fixedly arranged on the multiple groups of fixed support plate foot, the fixed support plate has multiple groups of fastening semicircular slot holes on both sides of the upper edge, the tail support beam is fixedly arranged on the tail support column, the guide rail beam is provided with two groups, which are arranged relatively up and down, and the two ends are respectively fixedly arranged on the fixed support plate and the top of the support top beam, and the top of the guide rail beam of the upper side is fixedly provided with a support top beam, and the support rod is provided with multiple groups, and the two ends are respectively fixedly arranged on the fixed support plate and the top of the support top beam; The heat exchanger body is fixedly provided with a plurality of heat exchange fin assemblies for exchanging heat; The heat exchanger body is fixedly provided with an extrusion-leakage-proof floating pressure plate assembly.

[0009] Preferably, a gas heat source air inlet, a gas heat source air outlet, a medium liquid inlet, and a medium liquid outlet are fixedly arranged on the fixed support plate; the gas heat source air inlet and the gas heat source air outlet are arranged on the same vertical side, the medium liquid inlet and the medium liquid outlet are arranged on the same vertical side, the gas heat source air inlet is arranged on the lower side of the gas heat source air outlet, and the medium liquid inlet is arranged on the upper side of the medium liquid outlet; Preferably, the heat exchange fin assembly includes a first heat exchange fin and a second heat exchange fin; the heat exchange fin assembly is provided with multiple groups, the first heat exchange fin and the second heat exchange fin are mirror images of each other, and are provided with a fin front and a fin back, and the fin fronts of the first heat exchange fin and the second heat exchange fin are contacted and welded as a whole; Preferably, the front surfaces of the first heat exchange fins and the second heat exchange fins are both provided with special-shaped chain welding columns that are mirror images of each other, and two groups of the special-shaped chain welding columns are contact welded; Preferably, the heat exchange fin assembly includes a circular sealing ring and a special-shaped sealing ring, the first heat exchange fin is provided with a gas main channel A, a gas main channel B, a liquid main channel A, and a liquid main channel B, the gas main channel A and the gas main channel B are arranged on the same vertical side, the liquid main channel A and the liquid main channel B are arranged on the same vertical side, the gas main channel A, the gas main channel B, the liquid main channel A, and the liquid main channel B on the second heat exchange fin are coaxially corresponding to the gas main channel A, the gas main channel B, the liquid main channel A, and the liquid main channel B on the first heat exchange fin, and the gas main channel A, the gas main channel B, the liquid main channel A, and the liquid main channel B on two adjacent groups of the heat exchange fin assemblies are coaxially arranged; the front side of the fin is provided with plate surface strengthening punching holes along its four sides, and a plurality of groups of divergent gas guide grooves are provided along the gas main channel A and the gas main channel B to the middle position, and the fin A plurality of groups of oblique flow grooves are arranged in the middle of the front side, and a gas heat source flow cavity is arranged inside the special-shaped chain welding column on the first heat exchange fin and the second heat exchange fin; the back side of the fin is punched by the divergent gas guide groove and the oblique flow groove to form a plurality of groups of flow guide blocks, and a liquid guide groove and a liquid reflux groove are formed in the middle of the flow guide blocks formed by the plurality of groups of divergent gas guide grooves, and a liquid diversion groove is formed in the middle of the flow guide blocks formed by the plurality of groups of oblique flow grooves; a circular sealing groove is opened on the back side of the fin around the gas main channel A and the gas main channel B, and a special-shaped sealing groove is opened on the back side of the fin around the liquid main channel A, the liquid main channel B, the liquid guide groove, the liquid reflux groove, and the liquid diversion groove; the circular sealing ring is fixedly arranged on the circular sealing groove between the two groups of the heat exchange fin assemblies, and the special-shaped sealing ring is fixedly arranged on the special-shaped sealing groove between the two groups of the heat exchange fin assemblies; Preferably, two groups of guide rail beams are provided with wedge-shaped bosses, and a quick-release avoidance groove is provided on the side of the wedge-shaped bosses close to the tail support column. The tops of the first heat exchange fins and the second heat exchange fins are provided with top wedge-shaped positioning grooves, and the bottoms are provided with bottom wedge-shaped positioning grooves. The top wedge-shaped positioning grooves are movably sleeved on the wedge-shaped bosses on the upper guide rail beams, and the bottom wedge-shaped positioning grooves are movably sleeved on the wedge-shaped bosses on the lower guide rail beams. Preferably, the floating pressure plate assembly includes a fin pressure plate, a support shaft seat, and a support roller; the upper and lower sides of the fin pressure plate are respectively provided with wedge-shaped guide grooves, which are movably sleeved on the wedge-shaped bosses on the two groups of guide rail beams, and the support shaft seat is provided with two groups, which are fixedly provided on the fin pressure plate; the support roller is movably provided between the two groups of support shaft seats through a short shaft and a bearing, and is tangent to the upper guide rail beam; the fin pressure plate is provided with a special-shaped sealing groove on one side close to the heat exchange fin assembly; Preferably, the all-laser welded bulging long plate heat exchanger for high-salt dust working conditions also includes a self-cleaning device, which includes an oscillator, a water inlet tee, and a water outlet tee; the oscillator is provided with multiple groups, which are evenly fixedly arranged on the side of the fin pressing plate away from the heat exchange fin assembly, the gas heat source air inlet on the fixed support plate is fixedly provided with a water outlet tee, the gas heat source air outlet on the fixed support plate is fixedly provided with the water inlet tee, the water inlet tee is vertically provided with an air outlet and a water inlet, and the water outlet tee is vertically provided with an air inlet and a water outlet; Preferably, the all-laser-welded bulging long plate heat exchanger for high-salt dust working conditions also includes a constant clamping mechanism, which includes a motor fixing boss, a right-angle reducer, a motor, a screw, an ejector support, and a fixing rod; a plurality of groups of motor fixing bosses are fixedly arranged on the tail support column, a plurality of groups of right-angle reducers are arranged, which are fixedly arranged on the plurality of groups of motor fixing bosses, and a motor is fixedly arranged on each group of right-angle reducers, a plurality of groups of screws are arranged, which are movably arranged in each group of right-angle reducers, and an ejector support is movably arranged on the screw through a bearing, and the ejector support is fixedly arranged on the side of the fin pressure plate away from the heat exchange fin assembly; a plurality of fixing rods are arranged, which are fixedly arranged in the fastening semicircular slot hole through nuts; A process for using a fully laser welded bulging long plate heat exchanger for high-salt dust conditions, comprising the following steps: S1, multiple groups of heat exchange fin assemblies are movably sleeved on the wedge-shaped bosses on the two groups of guide rail beams through the top wedge-shaped positioning grooves and the bottom wedge-shaped positioning grooves one by one; when disassembling the heat exchange fin assemblies, they are removed one by one through the quick-release avoidance grooves; S2, the fin pressing plate slides linearly along the wedge-shaped boss on the guide rail beam, and the supporting roller is tangent to the upper guide rail beam to support the fin pressing plate to slide linearly along the guide rail beam; S3, the motor drives the screw to rotate through the right-angle reducer and moves linearly along the axis of the screw, and the screw is provided with an ejector support through a bearing to push the fin pressing plate to move linearly along the guide rail beam; S4, the high-salt dust gas enters the gas heat source circulation cavity through the gas main channel B of the first group of heat exchange fin assemblies, flows out through the gas main channel A, enters the gas main channel A of the second group of heat exchange fin assemblies, and then enters the gas heat source circulation cavity of the second group of heat exchange fin assemblies, and flows out through the gas main channel B of the second group of heat exchange fin assemblies, and operates alternately in an S shape in sequence; S5, the heat exchange medium liquid enters the space limited by the special-shaped sealing ring between the first and second groups of heat exchange fin assemblies through the liquid main channel A of the first group of heat exchange fin assemblies, flows out through the liquid main channel B, enters the liquid main channel B of the second group of heat exchange fin assemblies, and then enters the space limited by the special-shaped sealing ring between the second and third groups of heat exchange fin assemblies, and flows out through the liquid main channel A of the second group of heat exchange fin assemblies, and runs alternately in an S shape in sequence; S6. When working normally, the high-salt dust fume enters the water outlet tee through the air inlet, and then enters the gas heat source air inlet, flows into the water inlet tee through the gas heat source air outlet, and then flows out through the air outlet; S7, when the heat exchange fin assembly is cleaned, clean water enters the water inlet tee through the water inlet, enters the gas heat source outlet, enters the gas heat source inlet, enters the water outlet tee, and flows out through the water outlet; Compared with the prior art, the present invention has the following beneficial effects: 1. By setting up multiple groups of heat exchange fin assemblies, the first heat exchange fin and the second heat exchange fin are welded to form a gas channel cavity in the middle. By adopting the expansion and pressure process, the high-pressure fluid goes through the narrow channel of the plate, making full use of the high-pressure bearing advantage of the expansion and pressure plate; the low-pressure fluid goes through the wide channel, making full use of its low resistance drop advantage; at the same time, the heat exchange fin assembly is welded to form a gas channel cavity, which effectively avoids the corrosion of the sealing ring due to high-salt flue gas, prevents leakage, and improves the service life.

[0010] 2. The gas heat source enters from the bottom and exits from the top, and the medium liquid enters from the top and exits from the bottom. Except for a small amount of inlet and outlet sections, the maximum length of full counterflow is strived for, and the hot (smoke) side and the cold (air or exhaust gas) side have a uniform return, and a full return. The length of the plate can be made from 6 to 12 meters according to the position of the equipment; no header is set to reduce the space occupied by the equipment.

[0011] 3. By setting up special-shaped chain welding columns and adopting the laser chain double-seam deep melting welding process, high temperature can be generated in a very small area, so that the material can be melted quickly and a molten pool can be formed, thereby obtaining a weld with a high aspect ratio. The heat input to the workpiece is very low, so the thermal deformation and heat-affected zone are very small. The high cooling rate after welding makes the weld microstructure fine and improves the density of the weld. Combined with the adjustable bulging manufacturing process, the gas heat source flow cavity is unobstructed and its volume is increased.

[0012] 4. By setting up a floating pressure plate assembly, the stability and smoothness of the fin pressure plate operation can be effectively improved. By setting up a special-shaped sealing groove on the fin pressure plate, the leakage caused by uneven pressure of the fin pressure plate or uneven force due to long-term use can be effectively reduced.

[0013] 5. By setting up an oscillator, the residual dust on the inner wall of the high-salt dust in the heat exchange fin assembly can be vibrated and then discharged from the body with the high-pressure flue gas, achieving a self-cleaning effect.

[0014] 6. By setting the water inlet tee and water outlet tee in the self-cleaning device, when the internal cleaning of the equipment is required, close the vent valve, connect the water valve, and perform high-pressure water flushing on the gas channel cavity, which reduces the time and labor occupied by dismantling and cleaning, and improves the degree of automation of the equipment. At the same time, regular water flushing increases the service life of the equipment and effectively prevents dust clogging.

[0015] 7. By setting up a quick-release avoidance groove, when the heat exchange fin assembly needs to be dismantled and cleaned, it is only necessary to move the floating pressure plate assembly back to the quick-release avoidance groove, and the heat exchange fin assembly can be directly removed from the quick-release avoidance groove, which reduces the difficulty of disassembly and cleaning and reduces labor intensity.

[0016] 8. By setting a constant clamping mechanism, when assembly is required, the optimal width required for extrusion is calculated by installing the number of heat exchange fin assemblies, and the set value is entered into the system. The constant clamping mechanism is used to achieve precise position, which can maintain the optimal state while effectively preventing the extrusion from being too tight or too loose, which may affect the service life. At the same time, the use of a constant clamping mechanism can ensure the uniformity of the acceptance and effectively prevent leakage caused by uneven force. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention is further described in detail below in conjunction with the accompanying drawings: Figure 1 It is a right side view of the present invention; Figure 2 It is the front view of the present invention; Figure 3 A top view of the present invention; Figure 4 It is a left side view of the present invention; Figure 5 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 6 for Figure 1 Schematic diagram of the structure of the cross section in the AA direction; Figure 7 for Figure 6 A partial enlarged schematic diagram of the middle B area; Figure 8 This is a front view of the special-shaped sealing ring of the present invention; Fig. 9 This is a front view of the first heat exchange fin of the present invention; Fig.10 This is a rear view of the first heat exchange fin of the present invention; Fig.11 This is a left view of the heat exchange fin assembly of the present invention; Fig.12 for Fig.11 Structural schematic diagram of the cross section in the CC direction; Fig.13 for Fig.12 A partial enlarged schematic diagram of the middle D area; Fig.14 for Figure 2 Schematic diagram of the structure of the cross section in the EE direction; Fig.15 for Fig.14 A partial enlarged schematic diagram of the middle F area; In the figure: 1, heat exchanger body; 101, fixed support plate foot; 102, fixed support plate; 103, gas heat source inlet; 104, gas heat source outlet; 105, medium liquid inlet; 106, medium liquid outlet; 107, fastening semicircular slot; 108, tail support column; 109, tail support beam; 110, support top beam; 111, guide rail beam; 112, support rod; 113, wedge-shaped boss; 114, quick-release avoidance groove; 2, heat exchange fin assembly; 201, first heat exchange fin; 202, second heat exchange fin; 203, circular sealing ring; 204, special-shaped sealing ring; 205, front of fin; 206, back of fin; 207, plate surface strengthening punching; 208, special-shaped chain welding column; 209, divergent air guide groove; 210, oblique flow groove; 211, gas heat source flow cavity; 212, gas main channel A; 21 3. Gas main channel B; 214. Liquid main channel A; 215. Liquid main channel B; 216. Guide punch; 217. Liquid guide groove; 218. Liquid diversion groove; 219. Liquid reflux groove; 220. Circular sealing groove; 221. Special-shaped sealing groove; 222. Top wedge-shaped positioning groove; 223. Bottom wedge-shaped positioning groove; 3. Floating pressure plate assembly; 301. Fin pressure plate; 302. Support shaft seat; 303. Support roller shaft; 304, wedge-shaped guide groove; 305, special-shaped sealing groove; 4, self-cleaning device; 401, oscillator; 402, water inlet tee; 403, water outlet tee; 404, air inlet; 405, water inlet; 406, air outlet; 407, water outlet; 5, constant clamping mechanism; 501, motor fixing boss; 502, right-angle reducer; 503, motor; 504, screw rod; 505, ejector support; 506, fixing rod; DETAILED DESCRIPTION Example

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] See also Figure 1-Figure 15 A fully laser welded bulging long plate heat exchanger for high-salt dust working conditions, comprising a heat exchanger body 1, the heat exchanger body 1 comprising a fixed support plate foot 101, a fixed support plate 102, a fastening semicircular slot 107, a tail support column 108, a tail support beam 109, a support top beam 110, a guide rail beam 111, and a support rod 112; the fixed support plate foot 101 is provided with a plurality of groups, the fixed support plate 102 is fixedly arranged on the plurality of groups of the fixed support plate foot 101, the fixed support plate 1 02 has multiple sets of fastening semicircular slots 107 on both sides of the upper edge, the tail support beam 109 is fixedly arranged on the tail support column 108, the guide rail beam 111 is provided with two sets, which are arranged opposite to each other up and down, and the two ends are respectively fixedly arranged on the fixed support plate 102 and the top of the support top beam 110, and the top of the guide rail beam 111 on the upper side is fixedly provided with a support top beam 110, and the support rod 112 is provided with multiple sets, and the two ends are respectively fixedly arranged on the fixed support plate 102 and the top of the support top beam 110; The heat exchanger body 1 is fixedly provided with a plurality of heat exchange fin assemblies 2 for exchanging heat; The heat exchanger body 1 is fixedly provided with a floating pressure plate assembly 3 for extrusion and leakage prevention.

[0020] In some embodiments, see Figure 5 The fixed support plate 102 is fixedly provided with a gas heat source inlet 103, a gas heat source outlet 104, a medium liquid inlet 105, and a medium liquid outlet 106; the gas heat source inlet 103 and the gas heat source outlet 104 are arranged on the same vertical side, the medium liquid inlet 105 and the medium liquid outlet 106 are arranged on the same vertical side, the gas heat source inlet 103 is arranged on the lower side of the gas heat source outlet 104, and the medium liquid inlet 105 is arranged on the upper side of the medium liquid outlet 106; In some embodiments, see Fig.11The heat exchange fin assembly 2 includes a first heat exchange fin 201 and a second heat exchange fin 202; the heat exchange fin assembly 2 is provided with multiple groups, the first heat exchange fin 201 and the second heat exchange fin 202 are mirror images of each other, and are provided with a fin front 205 and a fin back 206, and the fin front 205 of the first heat exchange fin 201 and the second heat exchange fin 202 are in contact and welded as a whole; by setting up multiple groups of heat exchange fin assemblies, the first heat exchange fin and the second heat exchange fin are welded to form a gas channel cavity in the middle, and an expansion and pressing process is adopted, so that high-pressure fluid flows through the narrow channel of the plate, making full use of the high-pressure bearing advantage of the expansion and pressing plate; low-pressure fluid flows through the wide channel, making full use of its low resistance drop advantage; at the same time, the heat exchange fin assembly adopts welding to form a gas channel cavity, which effectively avoids the corrosion of the sealing ring due to high-salt flue gas, prevents leakage, and improves the service life.

[0021] In some embodiments, see Fig.13 The front faces 205 of the first heat exchange fins 201 and the second heat exchange fins 202 are both provided with mirror-imaged special-shaped chain welding columns 208, and the two groups of special-shaped chain welding columns 208 are contact welded; by providing special-shaped chain welding columns and adopting the laser chain double-seam deep fusion welding process, high temperature can be generated in a very small area, so that the material melts quickly and forms a molten pool, thereby obtaining a weld with a high aspect ratio, and the heat input to the workpiece is very low, so the thermal deformation and heat-affected zone are very small, and the high cooling rate after welding makes the weld microstructure fine and improves the density of the weld. Combined with the adjustable bulging manufacturing process, the gas heat source flow cavity is unobstructed and its volume is increased.

[0022] In some embodiments, see Figure 9-10The heat exchange fin assembly 2 includes a circular sealing ring 203 and a special-shaped sealing ring 204. The first heat exchange fin 201 is provided with a gas main channel A212, a gas main channel B213, a liquid main channel A214, and a liquid main channel B215. The gas main channel A212 and the gas main channel B213 are arranged on the same vertical side, and the liquid main channel A214 and the liquid main channel B215 are arranged on the same vertical side. The gas main channel A212, the gas main channel B213, the liquid main channel A214, and the liquid main channel B215 on the second heat exchange fin 202 are connected to the gas main channel A212, the gas main channel B213, the liquid main channel A214, and the liquid main channel B215 on the first heat exchange fin 201. A214 and liquid main channel B215 are coaxially corresponding, and the gas main channel A212, gas main channel B213, liquid main channel A214, and liquid main channel B215 on two adjacent groups of heat exchange fin assemblies 2 are coaxially arranged; the front side 205 of the fin is provided with plate surface strengthening punching holes 207 along its four sides, and a plurality of divergent gas guide grooves 209 are provided along the gas main channel A212 and gas main channel B213 to the middle position, and a plurality of bevel flow grooves 210 are provided in the middle position of the front side 205 of the fin, and a gas heat source flow cavity 211 is provided inside the special-shaped chain welding column 208 on the first heat exchange fin 201 and the second heat exchange fin 202; the back side 206 of the fin is protected by the The divergent gas guide grooves 209 and the oblique flow grooves 210 are punched to form a plurality of guide blocks 216, and the guide blocks 216 formed by the plurality of divergent gas guide grooves 209 form a liquid guide groove 217 and a liquid reflux groove 219 in the middle, and the guide blocks 216 formed by the plurality of oblique flow grooves 210 form a liquid diversion groove 218 in the middle; a circular sealing groove 220 is provided on the back side 206 of the fin around the main gas channel A212 and the main gas channel B213, and a special-shaped sealing groove 221 is provided on the back side 206 of the fin around the main liquid channel A214, the main liquid channel B215, the liquid guide groove 217, the liquid reflux groove 219, and the liquid diversion groove 218; the circular sealing groove 220 ... The shaped sealing ring 203 is fixedly arranged in the circular sealing groove 220 between the two groups of the heat exchange fin assemblies 2, and the special-shaped sealing ring 204 is fixedly arranged in the special-shaped sealing groove 221 between the two groups of the heat exchange fin assemblies 2; when in use, the high-salt dust gas enters the gas heat source circulation cavity 211 through the gas main channel B213 of the first group of the heat exchange fin assemblies 2, flows out through the gas main channel A212, enters the gas main channel A212 of the second group of the heat exchange fin assemblies 2, and then enters the gas heat source circulation cavity 211 of the second group of the heat exchange fin assemblies 2, and flows out through the gas main channel B213 of the second group of the heat exchange fin assemblies 2, and runs alternately in an S shape in sequence;The heat exchange medium liquid enters the space restricted by the special-shaped sealing ring 204 between the first and second groups of heat exchange fin assemblies 2 through the liquid main channel A214 of the first group of heat exchange fin assemblies 2, flows out through the liquid main channel B215, enters the liquid main channel B215 of the second group of heat exchange fin assemblies 2, and then enters the space restricted by the special-shaped sealing ring 204 between the second and third groups of heat exchange fin assemblies 2, flows out through the liquid main channel A214 of the second group of heat exchange fin assemblies 2, and runs alternately in an S shape; the gas heat source enters from the bottom and exits from the top, and the medium liquid enters from the top and exits from the bottom, except for a small amount of inlet and outlet sections, strive for full counterflow of the maximum length, and the hot (flue gas) side and the cold (air or exhaust gas) side have uniform return strokes, and a full return stroke. The plate length can be made to be 6 to 12 meters according to the position of the equipment; no header is set to reduce the space occupied by the equipment. ;

[0023] In some embodiments, see Fig.10 , Fig.15 The two groups of guide rail beams 111 are provided with wedge-shaped bosses 113, and the wedge-shaped bosses 113 are provided with quick-release avoidance grooves 114 on one side close to the tail support column 108. The tops of the first heat exchange fins 201 and the second heat exchange fins 202 are provided with top wedge-shaped positioning grooves 222, and the bottoms are provided with bottom wedge-shaped positioning grooves 223. The top wedge-shaped positioning grooves 222 are movably sleeved on the wedge-shaped bosses 113 on the upper guide rail beam 111, and the bottom wedge-shaped positioning grooves 223 are movably sleeved on the wedge-shaped bosses 113 on the lower guide rail beam 111. Boss 113; when in use, multiple groups of the heat exchange fin assemblies 2 are movably sleeved on the wedge-shaped bosses 113 on the two groups of the guide rail beams 111 through the top wedge-shaped positioning groove 222 and the bottom wedge-shaped positioning groove 223; when disassembling the heat exchange fin assemblies 2, they are disassembled one by one through the quick-release avoidance groove 114; by setting the quick-release avoidance groove, when the heat exchange fin assembly needs to be disassembled and cleaned, it is only necessary to move the floating pressure plate assembly back to the quick-release avoidance groove, and the heat exchange fin assembly can be directly removed from the quick-release avoidance groove, which reduces the difficulty of disassembly and cleaning and reduces labor intensity.

[0024] In some embodiments, see Fig.15The floating pressure plate assembly 3 includes a fin pressure plate 301, a support shaft seat 302, and a support roller 303; the upper and lower sides of the fin pressure plate 301 are respectively provided with wedge-shaped guide grooves 304, which are respectively movably mounted on the wedge-shaped bosses 113 on the two groups of guide rail beams 111; the support shaft seat 302 is provided with two groups, which are fixedly arranged on the fin pressure plate 301; the support roller 303 is movably arranged between the two groups of support shaft seats 302 through a short shaft and a bearing, and is tangent to the upper side of the guide rail beam 111; the fin pressure plate 301 is close to the A special-shaped sealing groove 305 is provided on one side of the heat exchange fin assembly 2; when in use, the fin pressure plate 301 slides linearly along the wedge-shaped boss 113 on the guide beam 111, and the support roller 303 is tangent to the upper guide beam 111, supporting the fin pressure plate 301 to slide linearly along the guide beam 111; by setting up a floating pressure plate assembly, the stability and smoothness of the operation of the fin pressure plate can be effectively improved, and by setting up the special-shaped sealing groove on the fin pressure plate, leakage caused by uneven pressure on the fin pressure plate or uneven force due to long-term use can be effectively reduced.

[0025] In some embodiments, see Figure 1 , Figure 6The fully laser welded bulging long plate heat exchanger for high-salt dust conditions also includes a self-cleaning device 4, which includes an oscillator 401, a water inlet tee 402, and a water outlet tee 403; the oscillator 401 is provided with multiple groups, which are evenly fixed on the side of the fin pressing plate 301 away from the heat exchange fin assembly 2, and the gas heat source air inlet 103 on the fixed support plate 102 is fixedly provided with a water outlet tee 403, and the gas heat source air outlet 104 on the fixed support plate 102 is fixedly provided with the water inlet tee 402, and the water inlet 402 is perpendicularly provided with an air outlet 406 and a water inlet 405, and the water outlet tee 403 is perpendicularly provided with an air inlet 404 and an outlet tee. Water outlet 407; when in use, when working normally, the high-salt dust flue gas enters the water outlet tee 403 through the air inlet 404, and then enters the gas heat source air inlet 103, flows into the water inlet tee 402 through the gas heat source air outlet 104, and then flows out through the air outlet 406; when the heat exchange fin assembly 2 is cleaned, clean water enters the water inlet tee 402 through the water inlet 405, enters the gas heat source air outlet 104, enters the gas heat source air inlet 103, enters the water outlet tee 403, and flows out through the water outlet 407; by setting an oscillator, the residual dust on the inner wall of the high-salt dust in the heat exchange fin assembly can be vibrated and then discharged from the body with the high-pressure flue gas, thereby achieving a self-cleaning effect. By setting the water inlet tee and water outlet tee in the self-cleaning device, when the internal cleaning of the equipment is required, the vent valve is closed, the water valve is connected, and the gas channel cavity is flushed with high-pressure water, which reduces the time and labor occupied by dismantling and cleaning and improves the degree of automation of the equipment. At the same time, regular water flushing increases the service life of the equipment and effectively prevents dust clogging.

[0026] In some embodiments, see Figure 4The fully laser welded bulging long plate heat exchanger for high-salt dust working conditions also includes a constant clamping mechanism 5, which includes a motor fixing boss 501, a right-angle reducer 502, a motor 503, a screw 504, an ejector support 505, and a fixing rod 506; a plurality of groups of motor fixing bosses 501 are fixedly arranged on the tail support column 108, a plurality of groups of right-angle reducers 502 are provided, which are fixedly arranged on the plurality of groups of motor fixing bosses 501, and a motor 503 is fixedly arranged on each group of right-angle reducers 502, a plurality of groups of screws 504 are provided, which are movably arranged in each group of right-angle reducers 502, and an ejector support 505 is movably arranged on the screw 504 through a bearing, and the ejector support 505 is fixedly arranged on the side of the fin pressing plate 301 away from the heat exchange fin assembly 2; There are multiple groups of fixing rods 506, which are fixed in the fastening semicircular groove holes 107 by nuts; when in use, the motor 503 drives the screw rod 504 to rotate through the right-angle reducer 502, and moves linearly along the axial direction of the screw rod 504, and the screw rod 504 is provided with an ejector support 505 through a bearing to push the fin pressing plate 301 to move linearly along the guide beam 111; by setting a constant clamping mechanism, when assembly is required, the optimal width required for extrusion is calculated by installing the number of pieces of the heat exchange fin assembly, and the set value is entered into the system. The constant clamping mechanism is used to achieve a precise position, which can maintain the optimal state while effectively preventing the extrusion from being too tight or too loose, which will affect the service life. At the same time, the use of a constant clamping mechanism can ensure the uniformity of the acceptance and effectively prevent leakage caused by uneven force.

[0027] A process for using a fully laser welded bulging long plate heat exchanger for high-salt dust conditions, comprising the following steps: S1, multiple groups of the heat exchange fin assemblies 2 are movably sleeved on the wedge-shaped bosses 113 on the two groups of the guide rail beams 111 through the top wedge-shaped positioning grooves 222 and the bottom wedge-shaped positioning grooves 223 one by one; when disassembling the heat exchange fin assemblies 2, they are removed one by one through the quick-release avoidance grooves 114; S2, the fin pressing plate 301 slides linearly along the wedge-shaped boss 113 on the guide rail beam 111, and the supporting roller 303 is tangent to the upper guide rail beam 111, supporting the fin pressing plate 301 to slide linearly along the guide rail beam 111; S3, the motor 503 drives the screw rod 504 to rotate through the right-angle reducer 502, and the screw rod 504 moves linearly along the axis direction, and the screw rod 504 is provided with an ejector support 505 through a bearing, thereby pushing the fin pressing plate 301 to move linearly along the guide rail beam 111; S4, the high-salt dust gas enters the gas heat source circulation cavity 211 through the gas main channel B213 of the first group of the heat exchange fin assembly 2, flows out through the gas main channel A212, enters the gas main channel A212 of the second group of the heat exchange fin assembly 2, and then enters the gas heat source circulation cavity 211 of the second group of the heat exchange fin assembly 2, and flows out through the gas main channel B213 of the second group of the heat exchange fin assembly 2, and runs alternately in an S shape; S5, the heat exchange medium liquid enters the space restricted by the special-shaped sealing ring 204 between the first and second groups of the heat exchange fin assemblies 2 through the liquid main channel A214 of the first group of the heat exchange fin assemblies 2, flows out through the liquid main channel B215, enters the liquid main channel B215 of the second group of the heat exchange fin assemblies 2, and then enters the space restricted by the special-shaped sealing ring 204 between the second and third groups of the heat exchange fin assemblies 2, and flows out through the liquid main channel A214 of the second group of the heat exchange fin assemblies 2, and runs alternately in an S shape in sequence; S6. When working normally, the high-salt dust fume enters the water outlet tee 403 through the air inlet 404, and then enters the gas heat source air inlet 103, flows into the water inlet tee 402 through the gas heat source air outlet 104, and then flows out through the air outlet 406; S7, when the heat exchange fin assembly 2 is cleaned, clean water enters the water inlet tee 402 through the water inlet 405, enters the gas heat source outlet 104, enters the gas heat source inlet 103, enters the water outlet tee 403, and flows out through the water outlet 407; Obviously, the above embodiments are merely examples for clearly explaining the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. However, these obvious changes or modifications derived from the spirit of the present invention are still within the protection scope of the present invention.

Claims

1. A fully laser welded bulged long plate heat exchanger for high salt dust conditions, characterized by: The heat exchanger comprises a heat exchanger body (1), wherein the heat exchanger body (1) comprises a fixed support plate foot (101), a fixed support plate (102), a fastening semicircular slot hole (107), a rear support column (108), a rear support beam (109), a support top beam (110), a guide rail beam (111), and a support rod (112); the fixed support plate foot (101) is provided with a plurality of groups, the fixed support plate (102) is fixedly arranged on the plurality of groups of fixed support plate foot (101), and the fixed support plate (102) is provided with a plurality of groups of fixed support plate foot (101) on both sides of the upper edge. There are a plurality of groups of fastening semicircular slot holes (107), a tail support beam (109) is fixedly arranged on the tail support column (108), two groups of guide rail beams (111) are arranged in an upper and lower relative manner, and the two ends are respectively fixedly arranged on the top of the fixed support plate (102) and the support top beam (110), and the top of the upper group of guide rail beams (111) is fixedly arranged with the support top beam (110), and a plurality of groups of support rods (112) are provided, and the two ends are respectively fixedly arranged on the top of the fixed support plate (102) and the support top beam (110); The heat exchanger body (1) is fixedly provided with a plurality of heat exchange fin assemblies (2) for exchanging heat; The heat exchanger body (1) is fixedly provided with an extrusion-leakage-proof floating pressure plate assembly (3).

2. The all-laser welded bulged long plate heat exchanger for high-salt dust conditions according to claim 1 is characterized in that: A gas heat source air inlet (103), a gas heat source air outlet (104), a medium liquid inlet (105), and a medium liquid outlet (106) are fixedly arranged on the fixed support plate (102); the gas heat source air inlet (103) and the gas heat source air outlet (104) are arranged on the same vertical side, the medium liquid inlet (105) and the medium liquid outlet (106) are arranged on the same vertical side, the gas heat source air inlet (103) is arranged on the lower side of the gas heat source air outlet (104), and the medium liquid inlet (105) is arranged on the upper side of the medium liquid outlet (106).

3. The all-laser welded bulged long plate heat exchanger for high-salt dust conditions according to claim 2 is characterized in that: The heat exchange fin assembly (2) comprises a first heat exchange fin (201) and a second heat exchange fin (202); the heat exchange fin assembly (2) is provided with a plurality of groups, the first heat exchange fin (201) and the second heat exchange fin (202) are mirror images of each other, and are provided with a fin front side (205) and a fin back side (206); the fin front sides (205) of the first heat exchange fin (201) and the second heat exchange fin (202) are contact welded together.

4. The all-laser welded bulged long plate heat exchanger for high-salt dust conditions according to claim 3 is characterized in that: The fin front faces (205) of the first heat exchange fin (201) and the second heat exchange fin (202) are both provided with specially shaped chain welding columns (208) that are mirror images of each other, and two groups of the specially shaped chain welding columns (208) are contact welded.

5. The all-laser welded bulged long plate heat exchanger for high-salt dust conditions according to claim 4 is characterized in that: The heat exchange fin assembly (2) comprises a circular sealing ring (203) and a special-shaped sealing ring (204); the first heat exchange fin (201) is provided with a gas main channel A (212), a gas main channel B (213), a liquid main channel A (214), and a liquid main channel B (215); the gas main channel A (212) and the gas main channel B (213) are arranged on the same vertical side; the liquid main channel A (214) and the liquid main channel B (215) are arranged on the same vertical side; the gas main channel A (212), the gas main channel B (213), the liquid main channel A (214), and the liquid main channel B (215) on the second heat exchange fin (202) The first heat exchange fin (201) is provided with a gas main channel A (212), a gas main channel B (213), a liquid main channel A (214), and a liquid main channel B (215) which are coaxially corresponding to each other, and the gas main channels A (212), gas main channels B (213), liquid main channels A (214), and liquid main channels B (215) on two adjacent groups of the heat exchange fin assemblies (2) are coaxially arranged; the front face (205) of the fin is provided with plate surface strengthening punching holes (207) along its periphery, and a plurality of groups of divergent gas guide grooves (209) are provided along the gas main channels A (212) and the gas main channels B (213) toward the middle position, and the front face (205) of the fin is provided with a plurality of divergent gas guide grooves (209) along the gas main channels A (212) and the gas main channels B (213). A plurality of groups of oblique flow grooves (210) are arranged in the middle position, and a gas heat source flow cavity (211) is arranged inside the special-shaped chain welding column (208) on the first heat exchange fin (201) and the second heat exchange fin (202); the back side (206) of the fin is punched by the divergent gas guide grooves (209) and the oblique flow grooves (210) to form a plurality of groups of guide blocks (216); a liquid guide groove (217) and a liquid reflux groove (219) are formed in the middle of the guide block (216) formed by the plurality of groups of the divergent gas guide grooves (209); a liquid diversion groove (218) is formed in the middle of the guide block (216) formed by the plurality of groups of the oblique flow grooves (210); A circular sealing groove (220) is provided on the back side (206) of the fin around the main gas channel A (212) and the main gas channel B (213); and a special-shaped sealing groove (221) is provided on the back side (206) of the fin around the main liquid channel A (214), the main liquid channel B (215), the liquid guide groove (217), the liquid reflux groove (219), and the liquid diversion groove (218); the circular sealing ring (203) is fixedly arranged in the circular sealing groove (220) between the two groups of the heat exchange fin assemblies (2); and the special-shaped sealing ring (204) is fixedly arranged in the special-shaped sealing groove (221) between the two groups of the heat exchange fin assemblies (2).

6. The all-laser welded bulged long plate heat exchanger for high-salt dust conditions according to claim 5 is characterized in that: A wedge-shaped boss (113) is provided on the two groups of guide rail beams (111); a quick-release avoidance groove (114) is provided on the side of the wedge-shaped boss (113) close to the tail support column (108); a top wedge-shaped positioning groove (222) is provided on the top of the first heat exchange fin (201) and the second heat exchange fin (202); a bottom wedge-shaped positioning groove (223) is provided on the bottom; the top wedge-shaped positioning groove (222) is movably sleeved on the wedge-shaped boss (113) on the upper guide rail beam (111); and the bottom wedge-shaped positioning groove (223) is movably sleeved on the wedge-shaped boss (113) on the lower guide rail beam (111).

7. The all-laser welded bulged long plate heat exchanger for high-salt dust conditions according to claim 6 is characterized in that: The floating pressure plate assembly (3) comprises a fin pressure plate (301), a support shaft seat (302), and a support roller (303); the fin pressure plate (301) is provided with wedge-shaped guide grooves (304) on the upper and lower sides, respectively, and are movably mounted on the wedge-shaped bosses (113) on the two groups of guide rail beams (111); two groups of support shaft seats (302) are provided, which are fixedly mounted on the fin pressure plate (301); the support roller (303) is movably mounted between the two groups of support shaft seats (302) via a short shaft and a bearing, and is tangent to the upper guide rail beam (111); the fin pressure plate (301) is provided with a special-shaped sealing groove (305) on the side close to the heat exchange fin assembly (2).

8. The all-laser welded bulged long plate heat exchanger for high-salt dust conditions according to claim 7 is characterized in that: The fully laser welded bulging long plate heat exchanger for high-salt dust working conditions further comprises a self-cleaning device (4), the self-cleaning device (4) comprising an oscillator (401), a water inlet tee (402), and a water outlet tee (403); the oscillator (401) is provided in multiple groups and is evenly and fixedly arranged on the side of the fin pressing plate (301) away from the heat exchange fin assembly (2); the gas heat source air inlet (103) on the fixed support plate (102) is fixedly arranged with a water outlet tee (403); the gas heat source air outlet (104) on the fixed support plate (102) is fixedly arranged with the water inlet tee (402); the water inlet tee (402) is provided with an air outlet (406) and a water inlet (405) perpendicularly to each other; the water outlet tee (403) is provided with an air inlet (404) and a water outlet (407) perpendicularly to each other.

9. The all-laser welded bulged long plate heat exchanger for high-salt dust conditions according to claim 8, characterized in that: The fully laser welded bulging long plate heat exchanger for high-salt dust working conditions further comprises a constant clamping mechanism (5), wherein the constant clamping mechanism (5) comprises a motor fixing boss (501), a right-angle reducer (502), a motor (503), a screw (504), an ejection support (505), and a fixing rod (506); a plurality of motor fixing bosses (501) are fixedly arranged on the tail support column (108), and a plurality of right-angle reducers (502) are provided, which are fixedly arranged on the plurality of motor fixing bosses (501). A motor (503) is fixedly arranged on each group of the right-angle reducers (502); a plurality of screw rods (504) are arranged and movably arranged in each group of the right-angle reducers (502); an ejector support (505) is movably arranged on the screw rods (504) through a bearing; the ejector support (505) is fixedly arranged on a side of the fin pressing plate (301) away from the heat exchange fin assembly (2); a plurality of fixing rods (506) are arranged and fixedly arranged in the fastening semicircular slot hole (107) through a nut.

10. The process for using a fully laser welded bulged long plate heat exchanger for high-salt dust conditions according to claim 9, characterized in that: The steps include: S1, a plurality of groups of heat exchange fin assemblies (2) are movably sleeved on the wedge-shaped bosses (113) on the two groups of guide rail beams (111) through the top wedge-shaped positioning grooves (222) and the bottom wedge-shaped positioning grooves (223); when disassembling the heat exchange fin assemblies (2), they are removed one by one through the quick-release avoidance grooves (114); S2, the fin pressing plate (301) slides linearly along the wedge-shaped boss (113) on the guide rail beam (111), and the supporting roller (303) is tangent to the upper guide rail beam (111), supporting the fin pressing plate (301) to slide linearly along the guide rail beam (111); S3, the motor (503) drives the screw rod (504) to rotate through the right-angle reducer (502), and to move linearly along the axis direction of the screw rod (504), and the screw rod (504) is movably provided with an ejector support (505) through a bearing, thereby pushing the fin pressing plate (301) to move linearly along the direction of the guide rail beam (111); S4, the high-salt dust gas enters the gas heat source circulation cavity (211) through the gas main channel B (213) of the first group of the heat exchange fin assemblies (2), flows out through the gas main channel A (212), enters the gas main channel A (212) of the second group of the heat exchange fin assemblies (2), and then enters the gas heat source circulation cavity (211) of the second group of the heat exchange fin assemblies (2), and flows out through the gas main channel B (213) of the second group of the heat exchange fin assemblies (2), and operates alternately in an S shape in sequence; S5, the heat exchange medium liquid enters the space restricted by the special-shaped sealing ring (204) between the first and second groups of the heat exchange fin assemblies (2) through the liquid main channel A (214) of the first group of the heat exchange fin assemblies (2), flows out through the liquid main channel B (215), enters the liquid main channel B (215) of the second group of the heat exchange fin assemblies (2), and then enters the space restricted by the special-shaped sealing ring (204) between the second and third groups of the heat exchange fin assemblies (2), and flows out through the liquid main channel A (214) of the second group of the heat exchange fin assemblies (2), and runs alternately in an S shape in sequence; S6. When working normally, the high-salt dust fume enters the water outlet tee (403) through the air inlet (404), then enters the gas heat source air inlet (103), flows into the water inlet tee (402) through the gas heat source air outlet (104), and then flows out through the air outlet (406); S7. When the heat exchange fin assembly (2) is cleaned, clean water enters the water inlet tee (402) through the water inlet (405), enters the gas heat source outlet (104), enters the gas heat source inlet (103), enters the water outlet tee (403), and flows out through the water outlet (407).

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