All-welded pressure-bearing plate type waste heat recovery heat exchanger and using method

Abstract

The invention discloses an all-welded pressure-bearing plate type waste heat recovery heat exchanger and a using method, and belongs to the technical field of heat exchangers. An all-welded pressure-bearing type plate-type waste heat recovery heat exchanger comprises a fixing frame and further comprises large screws arranged on the two sides of the fixing frame, heat exchange plates are further welded to the inner side of the fixing frame, herringbone corrugated sheets are arranged on the inner sides of the heat exchange plates, the two sides of the herringbone corrugated sheets are sleeved with hollow rubber bases, and SMA alloy sheets are further arranged on the inner sides of the hollow rubber bases; a one-way sealing structure, a ripple adjusting structure and a blocking structure; through the SMA alloy sheet and the electric corrugated adjusting structure, the inclination angle of the herringbone corrugated sheet can be dynamically adjusted along with the temperature or fluid characteristics, deposition is reduced, the position of a water outlet groove opening is rotationally adjusted under the running fit of the straight-through water pipe, the rotating ring and the fixed ring, directional water spraying is achieved, and the water spraying effect is improved. And the angle of the runner can be locally adjusted by matching with a corrugated adjusting structure during blockage to avoid shutdown for cleaning.

Description

Technical Field

[0001] This invention relates to the field of heat exchanger technology, and in particular to a fully welded pressure-bearing plate waste heat recovery heat exchanger and its usage method. Background Technology

[0002] The fully welded pressure-bearing plate heat exchanger is a highly efficient and energy-saving heat exchange device, mainly used for waste heat recovery and utilization in industrial processes. Unlike traditional detachable plate heat exchangers, this device adopts a fully welded structure, offering advantages such as strong pressure resistance, good sealing, and compact structure. Pressure-bearing plate heat exchangers represent a key development direction for plate heat exchangers today. Plate heat exchangers have gained widespread attention and are applied in various industries due to their compact structure, high heat exchange efficiency, large logarithmic mean temperature difference, and small terminal temperature difference. Waste heat recovery heat exchangers transfer heat from high-temperature fluids (such as flue gas and steam) to low-temperature fluids (such as water and air) through plates, achieving heat energy recovery and utilization. The high-temperature and low-temperature fluids flow in opposite directions within adjacent channels, exchanging heat through the plates.

[0003] A search revealed Chinese patent application CN203983956U, which discloses a transformer neutral point disconnecting switch device. The device uses a high-pressure pump to pump fluid into a high-pressure flow channel manifold. The heat exchange fluid is evenly distributed throughout the high-pressure flow channel via the high-pressure inlet manifold. Within the high-pressure flow channel, the fluid undergoes phase change heat transfer as it flows through corrugated plates. The high-pressure fluid absorbs a large amount of heat from the low-pressure fluid. The low-pressure fluid then passes through a low-pressure inlet manifold, where it is evenly distributed throughout the low-pressure flow channel. The fluid undergoes strong convective heat transfer due to the turbulence caused by the turbulence columns. The heat from the low-pressure fluid is transferred to the high-pressure fluid through the heat conduction of the plates. Finally, the low-pressure fluid exits the heat exchanger through the low-pressure outlet manifold, completing the heat exchange process.

[0004] The aforementioned patent still has the following shortcomings: Although this device is a fully welded pressure plate heat exchanger with high leak prevention and stability, industrial waste gas containing dust, sulfides, etc. will deposit on the plate surface, reducing heat exchange efficiency. The fully welded structure of the marking machine cannot be disassembled and can only be flushed with high-pressure water or chemically cleaned, which has limited effect and may corrode the plates. In addition, the herringbone corrugation of the traditional plates is a static design and cannot adapt to different working conditions. Once the flow channel is blocked, the machine must be stopped for treatment, affecting continuous production. In case of severe blockage, the entire heat exchanger module must be replaced, which is costly. Summary of the Invention

[0005] The purpose of this invention is to address the problems of existing fully welded pressure-bearing plate heat exchangers, which are widely used in waste heat recovery systems due to their compact structure, high pressure resistance, and leak-free operation. However, industrial waste gas contains dust, sulfides, etc., which easily deposit on the plate surface, reducing heat exchange efficiency. The fully welded structure cannot be disassembled, and can only be cleaned with high-pressure water or chemical cleaning, which has limited effectiveness and may corrode the plates. Furthermore, the herringbone corrugations of traditional plates are static designs that cannot adapt to different operating conditions. Once the flow channels are blocked, the system must be shut down for repair. Therefore, this invention proposes a fully welded pressure-bearing plate waste heat recovery heat exchanger and its usage method.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A fully welded pressure-bearing plate waste heat recovery heat exchanger includes a mounting frame and further includes: A large screw is set on both sides of a fixed frame, and heat exchange plates are welded to the inner side of the fixed frame. Herringbone corrugated plates are set on the inner side of the heat exchange plates. Hollow rubber seats are fitted on both sides of the herringbone corrugated plates. SMA alloy plates are set on the inner side of the hollow rubber seats. Corrugated steering connection components are set on the outer side of the SMA alloy plates. A one-way sealing structure is provided on one side of the heat exchange plate for cross heat exchange of the incoming fluid; A corrugated adjustment structure is provided on the outside of the fixed frame for connecting the herringbone corrugated sheet and adjusting the direction of the protruding end of the herringbone corrugated sheet. A straight water pipe is fixedly connected to the outside of the fixed frame. A rotating ring is fixedly connected to one end of the straight water pipe. A fixed ring is provided on the outside of the rotating ring, which is rotatably sleeved on the outside of the straight water pipe and connected to the surface of the heat exchange plate. The fixed ring and the straight water pipe have water outlet slots of equal size inside. The water outlet slots are used to flexibly switch the flow of cleaning water to clean the surface of the heat exchange plate. A blocking structure, located on the other side of the fixed frame, is used to control the discharge of cleaning water and heat exchange fluid in stages.

[0007] As a preferred technical solution of this application, the corrugated steering connection assembly includes a positioning shaft installed on one side of the herringbone corrugated sheet, a support vertical plate installed on the outside of the positioning shaft, a transverse rod installed on the outside of the support vertical plate and penetrating the heat exchange plate, a roller shutter frame sleeved on the outside of the transverse rod and wrapped around the heat exchange plate with a grooved inner wall, and a support plate with a protruding edge installed on the outside of the transverse rod.

[0008] As a preferred technical solution of this application, the corrugated adjustment structure includes a vertical frame with an inner groove that is slidably connected to the outside of the support plate with a convex edge and welded to the surface of the heat exchange plate, a side support plate that is installed on the outside of the vertical frame with an inner groove and connected to the support plate with a convex edge, an electric telescopic rod installed below the side support plate, and a sliding frame with a groove that is installed below the electric telescopic rod and slidably connected to the side support plate.

[0009] As a preferred technical solution of this application, the one-way sealing structure includes a sealing gasket installed on one side of the fluid passage of the heat exchange plate, an inclined sealing strip installed below the sealing gasket, and a wide sealing strip installed on the outside of the inclined sealing strip and connected to the heat exchange plate.

[0010] As a preferred technical solution of this application, the blocking structure includes a hollow bracket installed on the other side of the fixed frame, a handle installed in the middle of the hollow bracket, a fine grinding slider installed on the outside of the handle, a rounded corner push plate installed on the outside of the fine grinding slider and slidably connected to the fine grinding slider, a compression spring installed at one end of the rounded corner push plate and connected to the inner side of the hollow groove of the hollow bracket, and a circular baffle installed on the outside of the rounded corner push plate and abutting against the outside of the fluid passage hole of the fixed frame.

[0011] As a preferred technical solution of this application, the inside of the fixing frame is provided with a capped drainage groove with the same inner diameter as the straight water pipe.

[0012] As a preferred technical solution of this application, the sealing gasket and the inclined sealing strip are symmetrically arranged on the inner side of the heat exchange plate, and the sealing gasket and the inclined sealing strip are symmetrically arranged between each group of heat exchange plates.

[0013] As a preferred technical solution of this application, the supporting vertical plate is located inside the heat exchange plate and forms an electric lifting structure through a horizontal rod and an electric telescopic rod, and the end face of the supporting vertical plate does not contact the inner surface of the heat exchange plate.

[0014] As a preferred technical solution of this application, the straight water pipes are located inside the fixing frame and are staggered, and the outer wall surface of the straight water pipes does not contact the surface of the inclined sealing strip.

[0015] A method for using a fully welded pressure-bearing plate waste heat recovery heat exchanger, employing the aforementioned device, includes the following steps: S1, industrial waste gas and cooling medium enter the corresponding flow channels through the one-way sealing structure, forming counter-flow and cross-flow heat exchange between the herringbone corrugated fins; S2. The intensity of vortex in the flow channel is changed by dynamically adjusting the tilt angle of the herringbone corrugated sheet through the corrugated adjustment structure. S3. Introduce high-pressure cleaning water, manually twist the rotating ring to rotate it, and overlap the water outlet of the fixed ring so that the water outlet is aligned with the heat exchange plates in different areas to remove dust or sulfide scale. S4. During normal operation, manually turn the handle lever to compress the spring and pull the rounded corner push plate, exposing the circular baffle to the fluid channel for heat exchange; S5. During cleaning, turn the handle in the opposite direction to block the fluid passage with a circular baffle and open the cap-type drain trough to discharge sewage in one direction.

[0016] Compared with the prior art, the present invention provides a fully welded pressure-bearing plate waste heat recovery heat exchanger and its usage method, which has the following beneficial effects: 1. This fully welded pressure-bearing plate waste heat recovery heat exchanger, through SMA alloy plates and an electric corrugated adjustment structure, allows the inclination angle of the herringbone corrugated plates to be dynamically adjusted according to temperature or fluid characteristics, adapting to different waste gas compositions, reducing deposition, and the roller shutter frame wraps the horizontal bars, making it resistant to high temperatures and chemical corrosion. 2. This fully welded pressure plate waste heat recovery heat exchanger achieves directional high-pressure water jetting by rotating and adjusting the position of the water outlet through the rotation of the straight water pipe, rotating ring and fixed ring. When blocked, the flow channel angle can be locally adjusted with the corrugated adjustment structure to avoid downtime for cleaning. 3. This fully welded pressure-bearing plate waste heat recovery heat exchanger uses a combination of inclined sealing strips and wide sealing strips to automatically seal using fluid pressure, and its symmetrical arrangement ensures heat exchange between multiple plates. 4. This fully welded pressure plate waste heat recovery heat exchanger uses a compression spring combined with a circular baffle to manually control the opening and closing of the fluid channel of the fixed frame, allowing cleaning wastewater and heat exchange fluid to be discharged in stages, avoiding mixed pollution. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a fully welded pressure-bearing plate waste heat recovery heat exchanger proposed in this invention; Figure 2 This is a side view of the structural diagram of the fixing frame of the all-welded pressure-bearing plate waste heat recovery heat exchanger proposed in this invention; Figure 3 This is an unfolded view of the heat exchange plates of a fully welded pressure-bearing plate waste heat recovery heat exchanger proposed in this invention. Figure 4 This is a distribution diagram of a fully welded pressure-bearing plate waste heat recovery heat exchanger with a convex edge support plate and an inner groove vertical frame proposed in this invention. Figure 5 This is a distribution diagram of the straight-through water pipes of a fully welded pressure plate waste heat recovery heat exchanger proposed in this invention. Figure 6This is a cross-sectional view of the heat exchange plates of a fully welded pressure-bearing plate waste heat recovery heat exchanger proposed in this invention. Figure 7 This is a schematic diagram of the corrugated steering connection assembly of a fully welded pressure-bearing plate waste heat recovery heat exchanger proposed in this invention. Figure 8 This is a diagram showing the distribution of SMA alloy plates in a fully welded pressure-bearing plate waste heat recovery heat exchanger proposed in this invention. Figure 9 This is a diagram illustrating the blocking effect of a blocking structure for a fully welded pressure-bearing plate waste heat recovery heat exchanger proposed in this invention. Figure 10 This is a distribution diagram of the compression springs in a fully welded pressure-bearing plate waste heat recovery heat exchanger proposed in this invention. Figure 11 This invention proposes a fully welded pressure-bearing plate waste heat recovery heat exchanger. Figure 3 A schematic diagram of the structure of part A.

[0018] In the picture: 1. Fixed frame; 2. Large screw; 21. Heat exchange plate; 22. Herringbone corrugated sheet; 23. Hollow rubber seat; 24. SMA alloy sheet; 25. Corrugated steering connection assembly; 251. Positioning shaft; 252. Support vertical plate; 253. Horizontal bar; 254. Roller blind frame; 255. Support plate with raised edge; 3. One-way sealing structure; 301. Sealing gasket; 302. Inclined sealing strip; 303. Wide sealing strip; 4. Corrugated Adjustable structure; 401, vertical frame with inner groove; 402, side support plate; 403, electric telescopic rod; 404, frame with sliding groove; 5, straight water pipe; 51, rotating ring; 52, fixed ring; 53, water outlet; 6, blocking structure; 601, hollow bracket; 602, handle; 603, precision ground slider; 604, rounded corner push plate; 605, compression spring; 606, circular baffle; 100, drainage groove with cap. Detailed Implementation

[0019] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention. Example

[0020] Reference Figure 1-8 A fully welded pressure-bearing plate waste heat recovery heat exchanger includes a fixed frame 1, and further includes: Large screws 2 are installed on both sides of the fixed frame 1. Heat exchange plates 21 are welded to the inner side of the fixed frame 1. Herringbone corrugated sheets 22 are installed on the inner side of the heat exchange plates 21. Hollow rubber seats 23 are fitted on both sides of the herringbone corrugated sheets 22. SMA alloy sheets 24 are installed on the inner side of the hollow rubber seats 23. Corrugated steering connection components 25 are installed on the outer side of the SMA alloy sheets 24. The fixed frame 1 serves as the main support structure, used to weld the heat exchange plates 21 and integrate various functional components. Large screws 2 provide overall pressure bearing and fastening force to ensure the sealing of the fully welded structure under high pressure conditions. Hollow rubber seats 23 elastically support the herringbone corrugated sheets 22, buffer vibration and transmit SMA alloy deformation force. SMA alloy sheets 24 and electric telescopic rods 403 work together to achieve adaptive adjustment of the corrugated sheets. A one-way sealing structure 3 is provided on one side of the heat exchange plate 21 for cross heat exchange of the incoming fluid; The corrugated adjustment structure 4 is set on the outside of the fixed frame 1 and is used to connect the herringbone corrugated sheet 22 and adjust the direction of the protruding end of the herringbone corrugated sheet 22; the heat exchange plate 21, as the core heat exchange unit, is welded to the inside of the fixed frame 1 to form a closed pressure flow channel. A straight water pipe 5 is fixedly connected to the outside of the fixing frame 1. One end of the straight water pipe 5 is fixedly connected to a rotating ring 51. A fixing ring 52 is provided on the outside of the rotating ring 51, which is rotatably sleeved on the outside of the straight water pipe 5 and connected to the surface of the heat exchange plate 21. The fixing ring 52 and the straight water pipe 5 have water outlet slots 53 of equal size inside. The water outlet slots 53 are used to flexibly switch the cleaning water to clean the surface of the heat exchange plate 21. The high-pressure cleaning water channels of the straight water pipe 5 are staggered and cover the entire plate area. The fixing ring 52 cooperates with the rotating ring 51 to spray cleaning water in a directional manner through the water outlet slots 53. Manually rotating the rotating ring 51 allows high-pressure water to precisely cover the corrugated sheet surface through the fan-shaped water outlet 53, flushing away the scale layer in reverse. The circular baffle 606 seals the fluid channel, and the wastewater is centrally treated through the drain trough 100 with a filter cap, achieving zero pollution discharge. This method is suitable for waste heat recovery scenarios involving high dust and highly corrosive exhaust gases.

[0021] The blocking structure 6 is located on the other side of the fixed frame 1 and is used to control the discharge of cleaning water and heat exchange fluid in stages.

[0022] Before use, the heat exchange plates 21 are fixed to the internal support frame by laser welding. The heat exchange plates 21 are continuously and fully welded around their perimeter to ensure pressure-bearing and sealing performance. The crests and troughs of the herringbone corrugated sheets 22 are fixed to the support vertical plates 252 by spot welding and skip welding. The horizontal rods 253 are connected to the support vertical plates 252 by fillet welds to ensure shear resistance when adjusting the corrugation angle.

[0023] like Figure 3 and Figure 11As shown, in one embodiment: the corrugated steering connection assembly 25 includes a positioning shaft 251 installed on one side of the herringbone corrugated sheet 22, a support vertical plate 252 installed on the outside of the positioning shaft 251, a transverse rod 253 installed on the outside of the support vertical plate 252 and penetrating the heat exchange plate 21, a roller blind frame 254 sleeved on the outside of the transverse rod 253 and wrapped around the heat exchange plate 21 with a grooved inner wall, and a support plate 255 with a raised edge installed on the outside of the transverse rod 253; the positioning shaft 251 fixes the rotation fulcrum of the herringbone corrugated sheet 22, the support vertical plate 252 connects the transverse rod 253 and the corrugated sheet to transmit adjustment force, the roller blind frame 254 has a high-temperature resistant flexible wrapping layer to protect the transverse rod 253 and reduce friction, and the support plate 255 with a raised edge connects the corrugated adjustment structure 4 to realize force transmission.

[0024] The roller shutter frame 254 is made of segmented aluminum alloy profiles, with an outer layer of composite ceramic fiber felt and an inner layer of nano-aerogel film, forming a heat-blocking layer throughout the frame. A 2mm expansion gap is reserved at the connection between the horizontal rod 253 and the roller shutter frame 254, filled with graphite sealing strips to prevent deformation caused by thermal stress. Furthermore, the roller shutter frame 254 and the heat exchange plates 21 are entirely covered with SiO2 aerogel cloth, and the seams are sealed with high-temperature adhesive. This ensures the flexible rotation of the herringbone corrugated sheets 22 while effectively blocking thermal bridging effects, making it suitable for the long-term stable operation of high-temperature waste heat recovery systems.

[0025] like Figure 6 and Figure 7 As shown, in one embodiment: the corrugated adjustment structure 4 includes a vertical frame 401 with an inner groove that is slidably connected to the outside of the support plate 255 with a raised edge and welded to the surface of the heat exchange plate 21; a side support plate 402 installed on the outside of the vertical frame 401 with an inner groove and connected to the support plate 255 with a raised edge; an electric telescopic rod 403 installed below the side support plate 402; and a sliding frame 404 with a groove installed below the electric telescopic rod 403 and slidably connected to the side support plate 402. The vertical frame 401 with an inner groove is a guide sliding structure that restricts the movement trajectory of the support plate 255 with a raised edge. The side support plate 402 connects the electric telescopic rod 403 and the support plate 255 with a raised edge. The sliding frame 404 provides a sliding track to ensure a smooth adjustment process.

[0026] like Figure 2 and Figure 7 As shown, in one embodiment: the one-way sealing structure 3 includes a sealing gasket 301 installed on one side of the fluid passage of the heat exchange plate 21, an inclined sealing strip 302 installed below the sealing gasket 301, and a wide sealing strip 303 installed outside the inclined sealing strip 302 and connected to the heat exchange plate 21; the sealing gasket 301, together with the inclined sealing strip 302, serves as a basic sealing layer to prevent lateral fluid leakage, and the wide sealing strip 303 enhances the sealing reliability, forming a double guarantee with the inclined sealing strip 302.

[0027] The wide sealing strip 303 and the heat exchange plate 21 are bonded by micro-beam plasma welding to ensure that the sealing surface does not deform under high temperature. The oblique sealing strip 302 is fixed by laser deep penetration welding to achieve high wear resistance of the dynamic sealing surface. It has significant advantages in pressure bearing capacity, sealing reliability and long-term stability, and is particularly suitable for high temperature, high pressure and highly corrosive industrial waste gas waste heat recovery scenarios.

[0028] Simply by rotating the handle 602, the circular baffle 606 can be controlled by the spring 605 in conjunction with the rounded corner push plate 604. In operation mode, the wide sealing strip 303 and the circular baffle 606 form a redundant seal. Traditional fixed gaskets are prone to aging and leakage at high temperatures, while this device dynamically compensates for wear by using pressure adaptive sealing.

[0029] like Figure 9 and Figure 10 As shown, in one embodiment: the blocking structure 6 includes a hollow bracket 601 installed on the other side of the fixed frame 1, a handle 602 installed in the middle of the hollow bracket 601, a finely ground slider 603 installed on the outside of the handle 602, a rounded corner push plate 604 installed on the outside of the finely ground slider 603 and slidably connected to the finely ground slider 603, a compression spring 605 installed at one end of the rounded corner push plate 604 and connected to the inner side of the hollow groove of the hollow bracket 601, and a circular baffle 606 installed on the outside of the rounded corner push plate 604 and in contact with the outside of the fluid passage of the fixed frame 1; the handle 602 is a manual operating lever that controls the opening and closing of the circular baffle 606; the finely ground slider 603 is a high-precision sliding component that ensures the sealing surface is in contact; the rounded corner push plate 604 transmits the action of the handle 602 and pushes the circular baffle 606; and the compression spring 605 provides an automatic reset force to maintain the default sealing state.

[0030] like Figure 4 and Figure 9 As shown, in one embodiment: the inside of the fixing frame 1 is provided with a capped drainage trough 100 with the same inner diameter as the straight water pipe 5; the capped drainage trough 100 serves as a dedicated channel for cleaning wastewater, and the cap prevents accidental opening during operation, thus realizing step-by-step sewage discharge.

[0031] like Figure 2 and Figure 7 As shown, in one embodiment: the sealing gasket 301 and the inclined sealing strip 302 are symmetrically arranged on the inner side of the heat exchange plate 21, and the sealing gasket 301 and the inclined sealing strip 302 between each group of heat exchange plates 21 are symmetrically arranged.

[0032] like Figure 6 As shown, in one embodiment: the support vertical plate 252 is located inside the heat exchange plate 21 and forms an electric lifting structure through the horizontal rod 253 and the electric telescopic rod 403, and the end face of the support vertical plate 252 does not contact the inner surface of the heat exchange plate 21.

[0033] like Figure 4 and Figure 5 As shown, in one embodiment: the straight water pipes 5 are located inside the fixing frame 1 and are staggered, and the outer wall surface of the straight water pipes 5 does not contact the surface of the inclined sealing strip 302.

[0034] A method for using a fully welded pressure-bearing plate waste heat recovery heat exchanger, employing the aforementioned device, includes the following steps: S1, industrial waste gas and cooling medium enter the corresponding flow channels through the one-way sealing structure 3, forming counter-flow and cross-flow heat exchange between the herringbone corrugated sheets 22; S2. The inclination angle of the herringbone corrugated sheet 22 is dynamically adjusted by the corrugated adjustment structure 4 to change the intensity of the vortex in the flow channel. S3. Introduce high-pressure cleaning water, manually twist the rotating ring 51 to rotate, and overlap the water outlet 53 of the fixed ring 52 to make the water outlet 53 align with the heat exchange plates 21 in different areas to remove dust or sulfide scale. S4. During normal operation, when the handle 602 is turned by hand, the spring 605 is compressed and the rounded corner push plate 604 is pulled, so that the circular baffle 606 is exposed in the fluid channel and heat is exchanged. S5. During cleaning, rotate the handle 602 in the opposite direction. The circular baffle 606 blocks the fluid channel, and the cap of the capped drain 100 is opened to discharge sewage in one direction.

[0035] Specifically, in operation, the fully welded pressure-bearing plate waste heat recovery heat exchanger works as follows: dust-laden exhaust gas enters the left flow channel through the unidirectional sealing structure 3. The inclined sealing strip 302 automatically adheres to the wide sealing strip 303 under fluid pressure, ensuring unidirectional flow. The symmetrically arranged sealing structure achieves cross-counterflow heat exchange between multiple heat exchange plates 21. The inclined sealing strip 302 and the wide sealing strip 303 form a dynamic sealing interface, achieving reliable unidirectional flow control. Multiple sets of symmetrically arranged sealing structures work together to construct a highly efficient cross-counterflow heat exchange channel between the heat exchange plates 21, ensuring maximum heat exchange efficiency. Industrial waste gas and cooling medium are respectively sealed by a bidirectional adaptive sealing structure, which makes the medium form a three-dimensional cross-flow between the multi-layer herringbone corrugated sheets 22. The oblique sealing strip 302 and the wide sealing strip 303 form a pressure-responsive sealing interface to achieve a sealing and leak-proof effect. When a change in operating conditions is detected, the intelligent control system automatically activates the electric telescopic rod 403; the side support plate 402 drives the vertical frame 401 with an inner groove to make precise displacement. This movement is transmitted to the support vertical plate 252 via the horizontal rod 253, realizing stepless adjustment of the tilt angle of the herringbone corrugated sheet 22 to adapt to the operating conditions of different flow rates and dust concentrations; During online cleaning, the electric telescopic rod 403 first adjusts the corrugated sheets to the optimal flushing angle, and the high-pressure water system automatically matches the angle for reverse flushing. Connect the high-pressure water source to the straight water pipe 5, and ensure the cap of the covered drain trough 100 is open. Manually rotate the rotating ring 51, and the outlet 53 of the fixed ring 52 sequentially flushes the heat exchanger surface according to the reverse flow state of the herringbone corrugated sheets 22 at different angles. Reverse flushing is performed on the herringbone corrugated sheets 22 at different angles. Throughout the cleaning process, the circular baffle 606 keeps the fluid channel completely closed, ensuring that the cleaning wastewater is centrally discharged through the filtration system of the covered drain trough 100. Under normal operating conditions, rotating the handle 602 clockwise causes the precision-ground slider 603 to push the rounded-corner push plate 604 to compress the spring 605. The circular baffle 606 completely disengages from the fluid passage, and the wide sealing strip 303 forms a double seal with the circular baffle 606. Together with the heat exchange plate 21, the heat of the high-temperature fluid is transferred to the low-temperature fluid, realizing heat energy recovery and utilization. The high-temperature fluid and the low-temperature fluid flow in opposite directions in adjacent flow channels, and achieve heat exchange through the heat exchange plate 21.

[0036] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A fully welded pressure-bearing plate waste heat recovery heat exchanger, comprising a fixing frame (1), characterized in that, Also includes: A large screw (2) is set on both sides of a fixed frame (1), and a heat exchange plate (21) is welded on the inner side of the fixed frame (1). A herringbone corrugated plate (22) is set on the inner side of the heat exchange plate (21). A hollow rubber seat (23) is sleeved on both sides of the herringbone corrugated plate (22). An SMA alloy plate (24) is set on the inner side of the hollow rubber seat (23). A corrugated steering connection assembly (25) is set on the outer side of the SMA alloy plate (24). A one-way sealing structure (3) is provided on one side of the heat exchange plate (21); A corrugated adjustment structure (4) is provided on the outside of the fixed frame (1) for connecting the herringbone corrugated sheet (22) and adjusting the direction of the protruding end of the herringbone corrugated sheet (22); A straight water pipe (5) is fixedly connected to the outside of the fixed frame (1). A rotating ring (51) is fixedly connected to one end of the straight water pipe (5). A fixed ring (52) is provided on the outside of the rotating ring (51) and is rotatably sleeved on the outside of the straight water pipe (5) and connected to the surface of the heat exchange plate (21). The fixed ring (52) and the inside of the straight water pipe (5) are provided with water outlet slots (53) of equal size. A blocking structure (6) is set on the other side of the fixed frame (1) for step-by-step control of the discharge of cleaning water and heat exchange fluid.

2. The all-welded pressure-bearing plate waste heat recovery heat exchanger according to claim 1, characterized in that, The corrugated steering connection assembly (25) includes a positioning shaft (251) installed on one side of the herringbone corrugated sheet (22), a support vertical plate (252) installed on the outside of the positioning shaft (252), a transverse rod (253) installed on the outside of the support vertical plate (252) and penetrating the heat exchange plate (21), a roller shutter frame (254) sleeved on the outside of the transverse rod (253) and wrapped around the heat exchange plate (21) with a grooved inner wall, and a support plate (255) with a raised edge installed on the outside of the transverse rod (253).

3. The all-welded pressure-bearing plate waste heat recovery heat exchanger according to claim 2, characterized in that, The corrugated adjustment structure (4) includes a vertical frame (401) with an inner groove that is slidably connected to the outside of the support plate (255) with a raised edge and welded to the surface of the heat exchange plate (21), a side support plate (402) installed on the outside of the vertical frame (401) with an inner groove and connected to the support plate (255) with a raised edge, an electric telescopic rod (403) installed below the side support plate (402), and a grooved frame (404) installed below the electric telescopic rod (403) and slidably connected to the side support plate (402).

4. The all-welded pressure-bearing plate waste heat recovery heat exchanger according to claim 3, characterized in that, The one-way sealing structure (3) includes a sealing gasket (301) installed on one side of the fluid passage of the heat exchange plate (21), an inclined sealing strip (302) installed below the sealing gasket (301), and a wide sealing strip (303) installed outside the inclined sealing strip (302) and connected to the heat exchange plate (21).

5. A fully welded pressure-bearing plate waste heat recovery heat exchanger according to claim 3, characterized in that, The blocking structure (6) includes a hollow bracket (601) installed on the other side of the fixed frame (1), a handle (602) installed in the middle of the hollow bracket (601), a fine grinding slider (603) installed on the outside of the handle (602), a rounded corner push plate (604) installed on the outside of the fine grinding slider (603) and slidably connected to the fine grinding slider (603), a compression spring (605) installed at one end of the rounded corner push plate (604) and connected to the inside of the hollow groove of the hollow bracket (601), and a circular baffle (606) installed on the outside of the rounded corner push plate (604) and attached to the outside of the fluid passage of the fixed frame (1).

6. The all-welded pressure-bearing plate waste heat recovery heat exchanger according to claim 1, characterized in that, The fixed frame (1) has a capped drainage trough (100) with the same inner diameter as the straight water pipe (5) through it.

7. A fully welded pressure-bearing plate waste heat recovery heat exchanger according to claim 4, characterized in that, The sealing gasket (301) and the inclined sealing strip (302) are symmetrically arranged on the inner side of the heat exchange plate (21), and the sealing gasket (301) and the inclined sealing strip (302) are symmetrically arranged between each group of heat exchange plates (21).

8. A fully welded pressure-bearing plate waste heat recovery heat exchanger according to claim 3, characterized in that, The supporting vertical plate (252) is located inside the heat exchange plate (21) and forms an electric lifting structure through a horizontal rod (253) and an electric telescopic rod (403). The end face of the supporting vertical plate (252) does not contact the inner surface of the heat exchange plate (21).

9. A fully welded pressure-bearing plate waste heat recovery heat exchanger according to claim 4, characterized in that, The straight water pipes (5) are located inside the fixing frame (1) and are staggered, and the outer wall of the straight water pipes (5) does not contact the surface of the inclined sealing strip (302).

10. A method of using a fully welded pressure-bearing plate waste heat recovery heat exchanger, characterized in that, The procedure is performed using any one of the apparatuses of claims 1-9, comprising the following steps: S1, industrial waste gas and cooling medium enter the corresponding flow channels through the one-way sealing structure (3), forming counter-flow and cross-flow heat exchange between the herringbone corrugated sheets (22); S2. The inclination angle of the herringbone corrugated sheet (22) is dynamically adjusted by the corrugated adjustment structure (4) to change the vortex intensity in the flow channel; S3. Introduce high-pressure cleaning water, manually twist the rotating ring (51) to rotate, and overlap the water outlet (53) of the fixed ring (52) so that the water outlet (53) is aligned with the heat exchange plates (21) of different areas to remove dust or sulfide scale. S4. During normal operation, when the handle (51) is turned by hand, the spring (605) is compressed and the rounded corner push plate (604) is pulled, so that the circular baffle (606) is exposed to the fluid channel and heat exchange occurs. S5. During cleaning, rotate the handle (51) in the opposite direction. The circular baffle (303) blocks the fluid channel and opens the cap of the capped drain (100) to discharge sewage in one direction.

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