Casting waste heat recycling device

Abstract

The invention relates to the technical field of casting waste heat recycling, in particular to a casting waste heat recycling device which comprises a heat exchanger body, and a mounting mechanism and a main body mechanism are fixed to the heat exchanger body. A fixing mechanism is arranged on the mounting mechanism; the fixing mechanism is communicated with a fixing box; a filtering mechanism is clamped on the fixed box; a limiting mechanism is fixed on the fixed box; the filtering mechanism is clamped and mounted in the fixing box from the top end of the fixing box, so that the filtering mechanism can be communicated with the interior of the heat exchanger body, and impurities in flue gas can be conveniently filtered; after the filtering mechanism is mounted, the filtering mechanism can be positioned through the limiting mechanism, so that the filtering mechanism can be conveniently dismounted and cleaned subsequently; high-temperature flue gas enters the fixing box from the fixing mechanism and can be discharged into the heat exchanger body after being screened out through the filtering mechanism, cold water enters the heat exchanger body from the main body mechanism, then heat in the flue gas is conveniently transferred to water, and secondary utilization of heat energy is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of casting waste heat recovery and utilization, in particular to a casting waste heat recovery and utilization device. Background Art

[0002] The main reasons for the generation of high-temperature flue gas in the casting production process include metal smelting and high temperature. During the metal smelting process, metal materials and additives will produce harmful gases such as volatile organic compounds, sulfur dioxide, and nitrogen oxides under high temperature. These gases evaporate at high temperatures to form high-temperature flue gas. The waste heat recovery of high-temperature flue gas is mainly achieved through heat exchangers. The heat exchanger uses high-temperature flue gas to exchange heat with low-temperature media (such as water and air), and transfers the heat in the flue gas to the cooling medium through heat conduction and phase change heat transfer principles.

[0003] However, when the high-temperature flue gas is directly discharged into the heat exchanger, if no filter component is set at the smoke inlet of the heat exchanger, the impurities contained in the flue gas will enter the equipment together with the flue gas, and the impurities will adhere to the stainless steel fins of the heat exchange tube. After long-term use, dust will accumulate, which will easily affect the heat energy transfer of the heat exchange tube; when the filter is installed at the smoke inlet, the filter is set inside the smoke inlet. When the filter mesh is blocked by impurities, it is inconvenient to disassemble and assemble the filter, which will easily reduce the speed at which the high-temperature flue gas enters the heat exchanger. Summary of the invention

[0004] In view of the problems in the prior art, the present invention provides a device for recovering and utilizing waste heat of castings.

[0005] The technical solution adopted by the present invention to solve the technical problem is: a casting waste heat recovery device, comprising a heat exchanger body, a mounting mechanism and a main body mechanism are fixed on the heat exchanger body; a fixing mechanism is provided on the mounting mechanism; a fixing box is connected to the fixing mechanism; a filtering mechanism is mounted on the fixing box; two limiting mechanisms are symmetrically fixed on the top of the fixing box;

[0006] Specifically, the filtering mechanism includes a card plate and a card frame, the fixed box is snap-connected with the card frame, the top of the card frame is fixedly connected with the card plate, the card plate contacts the top of the fixed box, the card frame is provided with a through hole, a filter is fixedly installed on the card frame, the fixed box is provided with a slot, the top of the card plate is snap-connected with a cover plate, two plug-in blocks are symmetrically fixedly connected on the cover plate, the slot is snap-connected with the card frame, and the filter and the through hole are both connected to the interior of the fixed box.

[0007] Specifically, the limiting mechanism includes a fixed plate and a slot, two fixed plates are symmetrically fixedly connected to the top of the fixed box, slots and slide grooves are provided in the fixed plates, plug blocks are snap-fitted and installed at the slots, a bidirectional screw is rotatably connected to the fixed plate, a connecting rod is threadedly connected to the bidirectional screw, a clamping block is fixedly connected to the connecting rod, the clamping block is snap-fitted and connected to the plug block, the plug block is snap-fitted and connected to the fixed plate, the cover plate contacts the top of the fixed plate, the connecting rod is slidably connected to the fixed plate, the connecting rod is arranged in an L-shaped structure, and the end of the clamping block is arranged in an inclined structure.

[0008] Specifically, the mounting mechanism includes a lifting ring and a first protrusion, and a plurality of lifting rings and supports are fixedly connected to the heat exchanger body. Two groups of first protrusions are symmetrically fixedly installed on the heat exchanger body, and the two groups of lifting rings are symmetrically located at the top end of the heat exchanger body, and the two groups of supports are symmetrically located at the bottom end of the heat exchanger body.

[0009] Specifically, the fixing mechanism includes a first connecting plate and a smoke exhaust port, the two ends of the heat exchanger body are respectively connected with the first connecting plate and the second connecting plate, two groups of second protrusions are fixedly installed on the first connecting plate and the second connecting plate, the first connecting plate is fixedly installed with a smoke exhaust port, the second connecting plate is fixedly connected with a fixing box, the fixing box is fixedly installed with a smoke inlet, the first protrusion and the second protrusion are fixedly connected by bolts, and the smoke inlet is connected with the interior of the second connecting plate through the fixing box.

[0010] Specifically, the main structure includes fixed tubes and conduits, two groups of conduits are symmetrically fixed on the heat exchanger body, fixed tubes are fixedly installed on the conduits, and the two fixed tubes are respectively fixedly connected with a water inlet and a water outlet, and a plurality of heat exchange tubes are fixedly installed on the heat exchanger body, and the heat exchange tubes are connected with the conduits.

[0011] The beneficial effects of the present invention are:

[0012] (1) The device for recycling waste heat of castings described in the present invention is configured to install the filter mechanism from the top of the fixed box into the inside thereof, so that the filter mechanism can be connected to the inside of the heat exchanger body, thereby facilitating the filtering of impurities contained in the high-temperature flue gas. That is, before using the heat exchanger, the card frame can be first installed into the card slot provided in the fixed box, and the size of the card slot is the same as the size of the card frame. When the card frame is located inside the fixed box, it can fit tightly with the inner wall thereof, thereby facilitating the improvement of the sealing effect inside the fixed box. A card plate is installed at the top of the card frame. When the card frame is installed in the fixed box, the card plate contacts the top of the fixed box. Handles are installed on both sides of the card plate, thereby facilitating the subsequent disassembly of the card frame. A through hole is provided at the part of the card frame close to the smoke inlet, and a filter is fixedly installed at the part of the card frame away from the smoke inlet. When the high-temperature smoke enters the card frame from the smoke inlet, the impurities in the smoke can be filtered out by the filter, thereby preventing the impurities from adhering to the fins of the heat exchange tube and affecting the heat exchange effect of water or other media.

[0013] (2) In the device for recycling waste heat of castings described in the present invention, after the filter mechanism is installed, it can be positioned by the limiting mechanism, so as to facilitate the subsequent disassembly and cleaning of the filter mechanism, that is, the card frame is installed so that the card plate contacts the bottom end of the fixed box, and then the cover plate is installed in the card plate. Since two plug blocks are symmetrically installed at the bottom end of the cover plate, when the cover plate is installed, the plug blocks can be engaged with the slots provided in the fixed plate. When the bottom end of the plug block contacts the fixed plate, the operator can use a tool to rotate the bidirectional screw. The bidirectional screw rotates in the slide groove provided in the fixed plate, and there are two connecting rods threadedly connected on the bidirectional screw. When it rotates, it can drive the two connecting rods to move, and the threads at both ends of the bidirectional screw are in opposite directions. When the two connecting rods slide toward each other in the fixed plate, they can drive the card block to engage with the inside of the card block, and then the card block can be used to limit the card block, so as to facilitate the disassembly and assembly of the cover plate.

[0014] (3) In the device for recycling waste heat from castings described in the present invention, high-temperature flue gas enters the fixed box from the fixing mechanism, and can be discharged into the heat exchanger body after being screened by the filtering mechanism. Cold water enters the heat exchanger body from the main mechanism, thereby facilitating the transfer of heat in the flue gas to water, thereby realizing the secondary utilization of heat energy, that is, the high-temperature flue gas enters the fixed box from the smoke inlet, and enters the card frame from the through hole portion provided on the card frame, passes through the filter screen, and filters the impurities contained in the flue gas inside the card frame. The filtered flue gas then passes through the second connecting The connecting plate enters the heat exchanger body. At this time, water is introduced into the water inlet through an external water source. Since the water inlet is connected with several conduits through a fixed pipe, and the conduits are connected with the heat exchange tubes installed in the heat exchanger body, water flows to the heat exchange tubes. Stainless steel fins are provided on the side walls of the heat exchange tubes. The stainless steel fins are tightly attached to the heat exchange tubes, which can increase the heat transfer area of ​​the heat exchanger and make the water in the heat exchange tubes absorb the heat on the fins, thereby facilitating the transfer of heat in the flue gas to the water, realizing the secondary utilization of thermal energy, and the water that absorbs heat is finally discharged from the water outlet. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0016] Figure 1 A schematic diagram of the overall structure of a preferred embodiment of a casting waste heat recovery and utilization device provided by the present invention;

[0017] Figure 2 for Figure 1 An enlarged schematic diagram of the structure of section A is shown;

[0018] Figure 3 for Figure 1 An enlarged schematic diagram of the structure of part B is shown;

[0019] Figure 4 It is a schematic diagram of the connection structure between the fixing box and the card frame of the present invention;

[0020] Figure 5 It is a schematic diagram of the connection structure between the fixing box and the fixing plate of the present invention;

[0021] Figure 6 It is a schematic diagram of the connection structure between the card board and the card frame of the present invention;

[0022] Figure 7 It is a schematic diagram of the connection structure between the smoke inlet and the fixing box of the present invention;

[0023] Figure 8 for Figure 7 An enlarged schematic diagram of the C-section structure is shown.

[0024] In the figure: 1. heat exchanger body; 2. mounting mechanism; 201. lifting ring; 202. first protrusion; 203. support; 3. fixing mechanism; 301. first connecting plate; 302. smoke exhaust port; 303. second protrusion; 304. second connecting plate; 305. smoke inlet; 4. main mechanism; 401. heat exchange tube; 402. water inlet; 403. fixing tube; 404. conduit; 405. water outlet; 5. fixing box; 6. filtering mechanism; 601. card plate; 602. cover plate; 603. card frame; 604. plug block; 605. filter screen; 606. card slot; 607. through hole; 7. limiting mechanism; 701. fixing plate; 702. bidirectional screw; 703. slot; 704. slide groove; 705. connecting rod; 706. card block. DETAILED DESCRIPTION

[0025] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0026] like Figure 1 , Figure 2 , Figure 5 , Figure 6 and Figure 7 As shown, a casting waste heat recovery and utilization device according to the present invention comprises a heat exchanger body 1, on which a mounting mechanism 2 and a main mechanism 4 are fixed; a fixing mechanism 3 is provided on the mounting mechanism 2; a fixing box 5 is connected to the fixing mechanism 3; a filtering mechanism 6 is mounted on the fixing box 5; and two limiting mechanisms 7 are symmetrically fixed on the top of the fixing box 5;

[0027] Specifically, Figure 1 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8As shown, the filtering mechanism 6 includes a card plate 601 and a card frame 603, the fixed box 5 is snap-connected with the card frame 603, the top of the card frame 603 is fixedly connected with the card plate 601, the card plate 601 contacts with the top of the fixed box 5, the card frame 603 is provided with a through hole 607, a filter screen 605 is fixedly installed on the card frame 603, the fixed box 5 is provided with a slot 606, the top of the card plate 601 is snap-connected with a cover plate 602, two plug blocks 604 are symmetrically fixedly connected to the cover plate 602, the card frame 603 is snap-connected with the slot 606, the filter screen 605 and the through hole 607 are both connected with the interior of the fixed box 5, the filtering mechanism 6 is snap-connected and installed from the top of the fixed box 5 to the interior thereof, so that the filtering mechanism 6 can be connected with the interior of the heat exchanger body 1, thereby facilitating the filtering of the impurities contained in the high-temperature flue gas, that is, before using the heat exchanger, the card frame 6 can be first 03 is snap-fitted and installed in the slot 606 provided in the fixed box 5, and the size of the slot 606 is the same as the size of the card frame 603. When the card frame 603 is located inside the fixed box 5, it can fit closely with its inner wall, thereby facilitating the improvement of the sealing effect inside the fixed box 5; a card plate 601 is installed on the top of the card frame 603. When the card frame 603 is installed in the fixed box 5, the card plate 601 contacts the top of the fixed box 5, and handles are installed on both sides of the card plate 601, thereby facilitating the subsequent disassembly of the card frame 603; a through hole 607 is provided at the position of the card frame 603 close to the smoke inlet 305, and a filter screen 605 is fixedly installed at the position of the card frame 603 away from the smoke inlet 305. When the high-temperature flue gas enters the card frame 603 from the smoke inlet 305, the filter screen 605 can filter out the debris in the flue gas, thereby preventing the debris from adhering to the fins of the heat exchange tube 401 and affecting the heat exchange effect of water or other media.

[0028] Specifically, Figure 1 , Figure 3 , Figure 4 , Figure 5 , Figure 7 and Figure 8As shown, the limiting mechanism 7 includes a fixing plate 701 and a slot 703, the top of the fixing box 5 is symmetrically fixedly connected with two fixing plates 701, the fixing plate 701 is provided with a slot 703 and a slide groove 704, the slot 703 is clamped and installed with an insert block 604, the fixing plate 701 is rotatably connected with a bidirectional screw 702, the bidirectional screw 702 is threadedly connected with a connecting rod 705, the connecting rod 705 is fixedly connected with a clamping block 706, the clamping block 706 is clamped and connected with the insert block 604, the insert block 604 is clamped and connected with the fixing plate 701, the cover plate 602 is in contact with the top of the fixing plate 701, the connecting rod 705 is slidably connected with the fixing plate 701, the connecting rod 705 is arranged in an L-shaped structure, the end of the clamping block 706 is arranged in an inclined structure, after the filter mechanism 6 is installed, it can be positioned by the limiting mechanism 7, so as to facilitate the subsequent disassembly and removal of the filter mechanism 6 Cleaning, that is, installing the card frame 603 so that the card plate 601 contacts the bottom end of the fixed box 5, and then snap-fitting the cover plate 602 into the card plate 601. Since two plug blocks 604 are symmetrically installed at the bottom end of the cover plate 602, when installing the cover plate 602, the plug blocks 604 can be snap-fitted into the slots 703 provided in the fixed plate 701. When the bottom end of the plug block 604 contacts the fixed plate 701, the operator can use a tool to rotate the bidirectional screw 702. The bidirectional screw 702 is fixed. The slide groove 704 provided in the plate 701 rotates, and two connecting rods 705 are threadedly connected to the bidirectional screw 702. When it rotates, it can drive the two connecting rods 705 to move, and the thread directions at both ends of the bidirectional screw 702 are opposite. When the two connecting rods 705 slide toward each other in the fixed plate 701, they can drive the block 706 to engage with the inside of the plug block 604, and then the plug block 604 can be limited by the block 706, thereby facilitating the disassembly and assembly of the cover plate 602.

[0029] Specifically, Figure 1 and Figure 2 As shown, the mounting mechanism 2 includes a lifting ring 201 and a first protrusion 202, and a plurality of lifting rings 201 and supports 203 are fixedly connected to the heat exchanger body 1. Two groups of first protrusions 202 are symmetrically fixedly installed on the heat exchanger body 1, and the two groups of lifting rings 201 are symmetrically located at the top end of the heat exchanger body 1, and the two groups of supports 203 are symmetrically located at the bottom end of the heat exchanger body 1.

[0030] Specifically, Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 7As shown, the fixing mechanism 3 includes a first connecting plate 301 and a smoke exhaust port 302, and the two ends of the heat exchanger body 1 are respectively connected with the first connecting plate 301 and the second connecting plate 304, and two groups of second protrusions 303 are fixedly installed on the first connecting plate 301 and the second connecting plate 304, the first connecting plate 301 is fixedly installed with the smoke exhaust port 302, and the second connecting plate 304 is fixedly connected with a fixing box 5, and the fixing box 5 is fixedly installed with a smoke inlet 305, the first protrusion 202 and the second protrusion 303 are fixedly connected by bolts, and the smoke inlet 305 is connected with the inside of the second connecting plate 304 through the fixing box 5.

[0031] Specifically, Figure 1 and Figure 2 As shown, the main body mechanism 4 includes a fixed tube 403 and a conduit 404. Two groups of conduits 404 are symmetrically fixed on the heat exchanger body 1. The conduits 404 are fixedly installed with fixed tubes 403. The two fixed tubes 403 are respectively fixedly connected with a water inlet 402 and a water outlet 405. A plurality of heat exchange tubes 401 are fixedly installed on the heat exchanger body 1. The heat exchange tubes 401 are connected with the conduits 404. The high-temperature flue gas enters the fixed box 5 from the fixed mechanism 3 and can be discharged into the heat exchanger body 1 after being screened by the filter mechanism 6. Cold water enters the heat exchanger body 1 from the main body mechanism 4, so as to facilitate the transfer of heat in the flue gas to water and realize the secondary utilization of heat energy, that is, the high-temperature flue gas enters the fixed box 5 from the smoke inlet 305 and is discharged from the through hole 607 provided on the card frame 603. After entering the card frame 603, the impurities contained in the smoke are filtered out inside the card frame 603 through the filter screen 605. The filtered smoke then enters the heat exchanger body 1 through the second connecting plate 304. At this time, water is introduced into the water inlet 402 through an external water source. Since the water inlet 402 is connected with a plurality of conduits 404 through a fixed pipe 403, and the conduits 404 are connected with the heat exchange tubes 401 installed in the heat exchanger body 1, water flows to the heat exchange tubes 401. The side walls of the heat exchange tubes 401 are provided with stainless steel fins, which are tightly attached to the heat exchange tubes 401, which can increase the heat transfer area of ​​the heat exchanger, so that the water in the heat exchange tubes 401 absorbs the heat on the fins, thereby facilitating the transfer of heat in the smoke to the water, realizing the secondary utilization of thermal energy, and the water that absorbs heat is finally discharged from the water outlet 405.

[0032] When the present invention is used, first, before using the heat exchanger, the card frame 603 can be snap-fitted and installed in the card slot 606 provided in the fixed box 5, and the size of the card slot 606 is the same as the size of the card frame 603. When the card frame 603 is located inside the fixed box 5, it can fit closely with the inner wall thereof, thereby facilitating improving the sealing effect inside the fixed box 5. A card plate 601 is installed at the top of the card frame 603. When the card frame 603 is installed in the fixed box 5, the card plate 601 contacts the top of the fixed box 5, and the card Handles are installed on both sides of the plate 601, so as to facilitate the subsequent disassembly of the card frame 603; a through hole 607 is provided at the position of the card frame 603 close to the smoke inlet 305, and a filter 605 is fixedly installed at the position of the card frame 603 away from the smoke inlet 305. When the high-temperature smoke enters the card frame 603 from the smoke inlet 305, the filter 605 can filter out the debris in the smoke, thereby preventing the debris from adhering to the fins of the heat exchange tube 401 and affecting the heat exchange effect of water or other media;

[0033] The card frame 603 is installed so that the card plate 601 contacts the bottom end of the fixed box 5, and then the cover plate 602 is snap-fitted and installed in the card plate 601. Since two plug blocks 604 are symmetrically installed at the bottom end of the cover plate 602, when installing the cover plate 602, the plug blocks 604 can be snap-fitted into the slots 703 provided in the fixed plate 701. When the bottom end of the plug block 604 contacts the fixed plate 701, the operator can use a tool to rotate the bidirectional screw 702, and the bidirectional screw 702 is fixed on the fixed plate 701. The sliding groove 704 provided in the fixing plate 701 rotates, and two connecting rods 705 are threadedly connected to the bidirectional screw 702. When the bidirectional screw 702 rotates, the two connecting rods 705 can be driven to move, and the thread directions of the two ends of the bidirectional screw 702 are opposite. When the two connecting rods 705 slide toward each other in the fixing plate 701, the clamping block 706 can be driven to engage with the inside of the plug-in block 604, and then the plug-in block 604 can be limited by the clamping block 706, so as to facilitate the disassembly and assembly of the cover plate 602;

[0034] The high-temperature flue gas enters the fixed box 5 from the smoke inlet 305, and enters the card frame 603 from the through hole 607 provided on the card frame 603. The impurities contained in the flue gas are filtered out inside the card frame 603 through the filter screen 605. The filtered flue gas enters the heat exchanger body 1 through the second connecting plate 304. At this time, water is introduced into the water inlet 402 through an external water source. Since the water inlet 402 is connected with a plurality of conduits 404 through a fixed pipe 403, and the conduits 404 are connected with the heat exchange tubes 401 installed in the heat exchanger body 1, water flows to the heat exchange tubes 401, and the side walls of the heat exchange tubes 401 are provided with stainless steel fins, which are tightly attached to the heat exchange tubes 401, which can increase the heat transfer area of ​​the heat exchanger, so that the water in the heat exchange tubes 401 absorbs the heat on the fins, thereby facilitating the transfer of heat in the flue gas to the water, realizing the secondary utilization of thermal energy, and the water that absorbs heat is finally discharged from the water outlet 405.

[0035] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0036] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A device for recycling waste heat from castings, characterized in that: The heat exchanger comprises a heat exchanger body (1), on which a mounting mechanism (2) and a main body mechanism (4) are fixed; the mounting mechanism (2) is provided with a fixing mechanism (3); the fixing mechanism (3) is connected to a fixing box (5); a filtering mechanism (6) is mounted on the fixing box (5); and two limiting mechanisms (7) are symmetrically fixed at the top of the fixing box (5); The filtering mechanism (6) comprises a card plate (601) and a card frame (603); the card frame (603) is snap-connected to the fixed box (5); the top of the card frame (603) is fixedly connected to the card plate (601); the card plate (601) contacts the top of the fixed box (5); a through hole (607) is provided on the card frame (603); a filter screen (605) is fixedly mounted on the card frame (603); a card slot (606) is provided on the fixed box (5); the top of the card plate (601) is snap-connected to the cover plate (602); two plug blocks (604) are symmetrically fixedly connected to the cover plate (602).

2. The device for recycling waste heat of castings according to claim 1, characterized in that: The card slot (606) is engaged with a card frame (603), and the filter screen (605) and the through hole (607) are both in communication with the interior of the fixed box (5).

3. The device for recycling waste heat of castings according to claim 1, characterized in that: The limiting mechanism (7) comprises a fixing plate (701) and a slot (703); the top of the fixing box (5) is symmetrically fixedly connected with two fixing plates (701); the fixing plates (701) are provided with slots (703) and slide grooves (704); an insert block (604) is mounted in the slot (703); a bidirectional screw rod (702) is rotatably connected to the fixing plate (701); a connecting rod (705) is threadedly connected to the bidirectional screw rod (702); a clamping block (706) is fixedly connected to the connecting rod (705); and the clamping block (706) is clamped and connected to the insert block (604).

4. The device for recycling waste heat of castings according to claim 3 is characterized in that: The insert block (604) is snap-fitted to the fixing plate (701), and the cover plate (602) is in contact with the top end of the fixing plate (701).

5. The device for recycling waste heat of castings according to claim 3, characterized in that: The connecting rod (705) is slidably connected to the fixing plate (701), the connecting rod (705) is arranged in an L-shaped structure, and the end of the clamping block (706) is arranged in an inclined surface structure.

6. The device for recycling waste heat of castings according to claim 1, characterized in that: The mounting mechanism (2) comprises a lifting ring (201) and a first protrusion (202); a plurality of lifting rings (201) and a support (203) are fixedly connected to the heat exchanger body (1); and two groups of first protrusions (202) are symmetrically fixedly mounted on the heat exchanger body (1).

7. The device for recycling waste heat of castings according to claim 6, characterized in that: The two groups of the hanging rings (201) are symmetrically located at the top end of the heat exchanger body (1), and the two groups of the supports (203) are symmetrically located at the bottom end of the heat exchanger body (1).

8. The device for recycling waste heat of castings according to claim 7, characterized in that: The fixing mechanism (3) comprises a first connecting plate (301) and a smoke exhaust port (302); the two ends of the heat exchanger body (1) are respectively connected to the first connecting plate (301) and the second connecting plate (304); two groups of second protrusions (303) are fixedly mounted on the first connecting plate (301) and the second connecting plate (304); the smoke exhaust port (302) is fixedly mounted on the first connecting plate (301); the second connecting plate (304) is fixedly connected to a fixing box (5); and the fixing box (5) is fixedly mounted with a smoke inlet (305).

9. The device for recycling waste heat of castings according to claim 8, characterized in that: The first protrusion (202) and the second protrusion (303) are fixedly connected by bolts, and the smoke inlet (305) is connected to the interior of the second connecting plate (304) through the fixing box (5).

10. The device for recycling waste heat of castings according to claim 1, characterized in that: The main body structure (4) comprises a fixed tube (403) and a conduit (404); two groups of conduits (404) are symmetrically fixed on the heat exchanger body (1); the conduits (404) are fixedly mounted with fixed tubes (403); a water inlet (402) and a water outlet (405) are respectively fixedly connected to the two fixed tubes (403); a plurality of heat exchange tubes (401) are fixedly mounted on the heat exchanger body (1); and the heat exchange tubes (401) are in communication with the conduits (404).

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