Metal casting pouring waste heat recycling device and method

Abstract

The invention provides a metal casting pouring waste heat recycling device and a utilization method thereof.The metal casting pouring waste heat recycling device comprises a recycling input mechanism, the recycling input mechanism comprises a recycling cover and a conveying pipe, and the conveying pipe is provided with a high-temperature output pipe and a low-temperature output pipe; the recovery pipe is communicated with the high-temperature output pipe; a frame; the high-temperature section recovery mechanism is installed on the rack and comprises a waste heat recovery box connected with the recovery pipe, a buffer box arranged at the top of the waste heat recovery box and a heat exchange box arranged at the top of the buffer box, and an evaporation heat absorption piece is arranged in the waste heat recovery box; by arranging the high-temperature section recovery mechanism, the medium-low-temperature section recovery mechanism and the spraying treatment tower, heat of high-temperature flue gas can be absorbed, efficient recovery and utilization of flue gas waste heat are achieved, the flue gas subjected to spraying treatment is sucked and discharged, meanwhile, residues attached to the bottom of a filtering disc are continuously cleaned, the flue gas circulation efficiency is ensured, and the flue gas recycling efficiency is improved. And through the arrangement of the recovery input mechanism, power-source-free temperature control shunting is achieved, and effective recovery of waste heat of high-temperature and low-temperature flue gas is facilitated.

Description

Technical Field

[0001] The present invention relates to the technical field of metal casting, and particularly to a device for recovering and utilizing the waste heat of metal casting and a utilization method thereof. Background Art

[0002] Metal casting is to inject molten metal liquid into a hollow mold made of high-temperature resistant materials, and after condensation, a product with the expected shape is obtained, and the obtained product is a casting. During the pouring process of metal castings, a large amount of high-temperature flue gas is generated in links such as melting and pouring. If the heat energy contained in these flue gases can be effectively recovered and utilized, it can improve the energy utilization efficiency, reduce production costs and environmental pollution at the same time. By heating the air entering the combustion furnace with the flue gas, the temperature of the air entering the furnace is increased, the combustion efficiency is enhanced, thereby reducing fuel consumption, and effective recovery and utilization are carried out.

[0003] When the existing recovery and utilization device recovers waste heat, it adopts the direct heat exchange mode between high-temperature flue gas and air. For example, finned tubes or plate heat exchangers are arranged in the flue gas recovery flow channel, and the heat is transferred by the convection of flue gas and air. Due to the insufficient temperature difference gradient, the heat energy is not effectively utilized, and the recovery efficiency is low. Moreover, due to the dense arrangement of pipelines such as heat exchangers, pollutants carried in the flue gas are deposited on the surface of the heat exchanger, which will affect the waste heat recovery effect and is not convenient for cleaning during the subsequent flue gas transportation, and is not conducive to the heat energy recovery during the continuous discharge of flue gas. Therefore, the present invention proposes a device for recovering and utilizing the waste heat of metal casting and a utilization method thereof to solve the above problems. Summary of the Invention

[0004] In view of the above problems, the present invention proposes a device for recovering and utilizing the waste heat of metal casting to solve the problems that the heat energy of flue gas is not effectively utilized, the recovery efficiency is low, it is not convenient for cleaning during the subsequent flue gas transportation, and it is not conducive to the heat energy recovery during the continuous discharge of flue gas as mentioned in the above background art.

[0005] To achieve the object of the present invention, the present invention is realized through the following technical solutions: A device for recovering and utilizing the waste heat of metal casting includes a recovery input mechanism, which includes a recovery hood and a conveying pipe, and a high-temperature output pipe and a low-temperature output pipe are arranged on the conveying pipe; a recovery pipe communicated with the high-temperature output pipe; a frame; A high-temperature section recovery mechanism installed on the frame, which includes a waste heat recovery box connected to the recovery pipe, a buffer box arranged on the top of the waste heat recovery box, and a heat exchange box arranged on the top of the buffer box. An evaporation heat absorption member is arranged in the waste heat recovery box, and a storage tank B is arranged in the heat exchange box for the steam flowing in after the evaporation heat absorption member absorbs heat; A medium and low temperature section recovery mechanism is arranged on one side of the rack, comprising an air supply pipe section A and an air supply pipe section B connected to a heat exchange box, wherein the air inlet end of the air supply pipe section A is connected to a circulation box, the flue gas output end of the waste heat recovery box is connected to an input pipe, and a primary heat absorbing component installed on the input pipe is arranged between the air supply pipe section A and the air supply pipe section B; and The spray treatment tower comprises a tower body connected with an input pipe and a spray part arranged in the tower body, wherein the outlet end of the low-temperature output pipe is connected with the tower body through a connecting pipe; the inner wall of the tower body is connected with a fixing ring, the bottom of the fixing ring is connected with a filter plate through a spring telescopic rod, a cleaning part is installed at the bottom of the filter plate, a knocking sleeve is provided at the top of the filter plate, and a lifting part is installed in the tower body for driving the knocking sleeve to lift and lower back and forth.

[0006] Further improvements are as follows: the evaporative heat absorption component includes several storage tanks A arranged in the waste heat recovery box, a steam output pipe A extending into the buffer box and a return pipe A connected to one side of the bottom of the buffer box, the tops of several storage tanks A are connected to the same steam output pipe A through pipelines, the bottoms of several storage tanks A are connected to the same return pipe A through pipelines, a steam output pipe B extending into the heat exchange box is installed on the top of the buffer box, the tops of the storage tanks B are connected to the same steam output pipe B through pipelines, the top side of the buffer box is connected to a return pipe B extending into the heat exchange box, and the bottoms of the storage tanks B are connected to the same return pipe B through pipelines.

[0007] Further improvements are: the recycling input mechanism also includes a temperature control tube installed on the recycling cover, and a protective cover is installed on the top of the recycling cover; a first plunger and a second plunger are slidably arranged in the delivery pipe, the first plunger and the second plunger are connected by a connecting column, the distance between the high-temperature output pipe and the low-temperature output pipe is greater than the length of the connecting column, a spring installed in the delivery pipe is arranged on the side of the second plunger away from the connecting column, and a temperature control toggle member for driving the first plunger to move horizontally is arranged on the top of the recycling cover; Among them, the temperature control toggle member includes a right-handed spiral bimetal sheet installed in the temperature control tube. The bottom end of the right-handed spiral bimetal sheet is connected to the bottom of the temperature control tube, the top end of the right-handed spiral bimetal sheet is connected to a universal coupling, the top end of the universal coupling is connected to a rack, a guide tube for the stable lifting and guiding of the rack is installed at the top of the temperature control tube, a toggle gear meshing with the rack is rotatably connected inside the protective cover, and a linkage gear meshing with the toggle gear is also rotatably connected inside the protective cover. One side shaft end of the linkage gear is connected to a drive disk, an eccentric position on the side of the drive disk away from the linkage gear is rotatably connected to a connecting rod, one end of the connecting rod away from the drive disk is rotatably connected to a horizontal rod, and the horizontal rod extends into the delivery pipe and is rotatably connected to the side of the first plunger away from the connecting column; the bottom of the delivery pipe is connected to an intake pipe extending into the recovery cover, and the intake pipe is placed at the bottom between the high-temperature output pipe and the low-temperature output pipe; the outer layer of the right-handed spiral bimetal sheet is a high-expansion layer, and the inner side of the right-handed spiral bimetal sheet is a low-expansion layer.

[0008] A further improvement lies in that: the primary heat absorption member includes a heat preservation sleeve installed on the input pipe and a serpentine coil arranged between the heat preservation sleeve and the input pipe. One end of the serpentine coil is connected to the A section of the air supply pipe, and the other end is connected to the B section of the air supply pipe; The circulation box is arranged at the bottom of the tower body, and the circulation box is communicated with the A section of the air supply pipe. A transmission shaft is rotatably arranged inside the circulation box. A plurality of arc-shaped toggle blades are connected to the outer wall of the transmission shaft, and the plurality of arc-shaped toggle blades are arranged in a circumferential array. One side of the circulation box is connected to an inclined intake pipe, and the air outlet end of the inclined intake pipe corresponds to the concave part of the arc-shaped toggle blade.

[0009] A further improvement lies in that: the cleaning member includes a rotating column rotatably installed at the center of the filter disk, a lever connected to one side of the rotating column, and a cleaning brush connected to the side of the lever close to the filter disk. A square hole is provided inside the rotating column, a square rod is slidably inserted through the square hole, the bottom of the square rod is connected to a transmission rod, the transmission rod is rotatably connected to the tower body, and the bottom of the transmission rod extends into the circulation box and is connected to the transmission shaft.

[0010] A further improvement lies in that: the top of the tower body is connected to an installation pipe, a central shaft is rotatably connected inside the installation pipe through a bracket, and the top end of the central shaft is connected to an axial flow fan blade; The inner wall of the tower body is connected to a sealing cylinder through a support rod. The central shaft is rotatably connected to the sealing cylinder and extends into the sealing cylinder to be connected to a driving bevel gear. A driven bevel gear meshing with the driving bevel gear is rotatably connected inside the sealing cylinder. An eccentric rod is rotatably connected to an eccentric position on one side of the driven bevel gear. The bottom end of the eccentric rod is rotatably connected to a lifting slide rod, and the bottom of the lifting slide rod passes through the sealing cylinder and is connected to a knocking sleeve.

[0011] A further improvement lies in that: a pipe seat for stably fixing a conveying pipe is provided at the top of the recovery hood, and a guiding seat for stably supporting the sliding of a horizontal rod is also provided at the top of the recovery hood; the high-temperature output pipe is connected to a recovery pipe through a high-temperature pipeline; the connecting pipe fitting includes a low-temperature pipeline connected to the low-temperature output pipe, and one end of the low-temperature pipeline far from the low-temperature output pipe is connected to one end of the input pipe close to the tower body, and valves are connected to both the high-temperature pipeline and the low-temperature pipeline.

[0012] A further improvement lies in that: one end of the installation pipe far from the tower body is connected to an output pipe, one end of the output pipe far from the installation pipe is connected to a fan, and the air outlet end of the fan is connected to an air supply pipe.

[0013] A further improvement lies in that: the spraying member includes a spraying pipe group installed in the tower body, a liquid inlet pipe communicated with storage tank A is installed on one side of the tower body, and a liquid outlet pipe is connected to one side of the bottom of the tower body.

[0014] Using the above-mentioned device for recovering waste heat from metal casting pouring, the utilization method includes the following steps; S1. Accurately align the recovery hood with the waste heat recovery location after metal casting pouring. During use, the recovery hood can be set at different processing points to ensure that high-temperature flue gas is introduced into the recovery hood. The externally purified combustion-supporting air can be introduced from the circulation box. When the device works, the high-temperature flue gas flows into the recovery pipe from the high-temperature output pipe on the conveying pipe, and then enters the waste heat recovery box to recover sensible heat. The low-temperature flue gas flows into the tower body from the low-temperature output pipe; S2. In the waste heat recovery box, the evaporation heat absorption member absorbs the heat of the high-temperature flue gas and is converted into steam. The steam then flows into the heat exchange box to prepare for heat exchange with the subsequent air. The flue gas flows through the waste heat recovery box and into the input pipe. The combustion-supporting air is preliminarily heated through the primary heat absorption member to recover the waste heat of the flue gas in the input pipe. Then the air flows into the heat exchange box, and the steam heats the air for the second time. The heated air is transported to the combustion equipment through a special pipeline; S3. The flue gas enters the tower body, is sprayed by the spraying member, and at the same time is filtered by the filter disc to adsorb pollutants in the flue gas, and the flue gas is discharged from the tower body; S4. The lifting member periodically drives the knocking sleeve to move up and down to knock the filter disc, and the spring telescopic rod drives the filter disc to rebound, and the filter disc vibrates, prompting the particulate matter to be shaken off, and cooperating with the cleaning member to clean the residues attached to the bottom of the filter disc.

[0015] The present invention can absorb the heat of high-temperature flue gas and convert it into steam to exchange heat with subsequent air by arranging a high-temperature section recovery mechanism, a medium-low temperature section recovery mechanism and a spray treatment tower. Compared with the direct heat exchange between high-temperature flue gas and air, the present invention improves the thermal efficiency and energy utilization rate, completes the one-way heat conduction process of transferring heat from the high end to the low end, so as to carry out efficient heat transfer and realize the efficient recovery and utilization of flue gas waste heat; the flue gas after spray treatment is sucked out and discharged, the lifting part periodically drives the knocking sleeve to move up and down to knock the filter plate, the spring telescopic rod drives the filter plate to rebound, the filter plate vibrates, and the particles are shaken off, and the cleaning part is used to clean the residue attached to the bottom of the filter plate to prevent the particles from clogging the filter holes, thereby ensuring the flue gas circulation efficiency and facilitating the heat energy recovery during the continuous discharge of the flue gas; The present invention arranges a recovery input mechanism. When the temperature rises, the right-handed spiral bimetallic strip is heated and expanded, driving the rack to rise, driving the toggle gear to rotate counterclockwise, the linkage gear to rotate clockwise, the driving disk to rotate eccentrically, the connecting rod pushes the horizontal rod to move right, the first plunger and the second plunger move right to compress the spring, open the high-temperature output pipe, and close the low-temperature output pipe; when the temperature drops, the right-handed spiral bimetallic strip contracts, and the spring rebounds at the same time, the first plunger and the second plunger move left to reset, close the high-temperature output pipe, and open the low-temperature output pipe; power-free temperature control diversion is realized, which is beneficial to the effective recovery of high and low temperature flue gas waste heat. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 It is a structural schematic diagram of the medium-high temperature section recovery mechanism and part of the medium-low temperature section recovery mechanism of the present invention; Figure 3 It is a structural schematic diagram of the high temperature section recovery mechanism of the present invention; Figure 4 It is a structural schematic diagram of the spray treatment tower in the present invention; Figure 5 It is a schematic diagram of the structure of the cleaning member in the present invention; Figure 6 It is a schematic diagram of the structure inside the circulation box of the present invention; Figure 7 It is a structural schematic diagram of the lifting member in the present invention; Figure 8 It is a structural schematic diagram of the recycling input mechanism in the present invention; Figure 9 It is a partial structural schematic diagram of the recycling input mechanism in the present invention; Figure 10 It is a schematic diagram of the structure inside the temperature control tube of the present invention.

[0017] Among them: 1. Recovery input mechanism; 101. Recovery cover; 102. Delivery pipe; 103. Intake pipe; 104. Temperature control pipe; 105. Pipe seat; 106. Drive plate; 107. Connecting rod; 108. Horizontal rod; 109. Guide seat; 110. First plunger; 111. Connecting column; 112. Second plunger; 113. Spring; 114. High temperature output pipe; 115. Low temperature output pipe; 116. High temperature pipeline; 117. Low temperature pipeline; 1 18. Rack; 119. Driving gear; 120. Linkage gear; 121. Right-handed spiral bimetallic strip; 122. Universal coupling; 123. Guide cylinder; 2. Recovery pipe; 3. Rack; 4. High-temperature section recovery mechanism; 401. Waste heat recovery box; 402. Buffer box; 403. Heat exchange box; 404. Storage tank A; 405. Steam output pipe A; 406. Reflux pipe A; 407. Steam output pipe B; 408. Storage tank B; 409. Reflux Flow pipe B; 5. Medium and low temperature section recovery mechanism; 501. Insulation sleeve; 502. Serpentine coil; 503. Air supply pipe section A; 504. Air supply pipe section B; 505. Circulation box; 506. Oblique air inlet pipe; 507. Transmission shaft; 508. Arc-shaped toggle blade; 6. Input pipe; 7. Spray treatment tower; 701. Tower body; 702. Mounting pipe; 703. Sealing cylinder; 704. Spray pipe group; 705. Liquid inlet pipe; 706. Fixing ring; 707. Spring telescopic rod; 708, filter plate; 709, liquid outlet pipe; 710, rotating column; 711, lever; 712, cleaning brush; 713, square hole; 714, square rod; 715, transmission rod; 716, axial flow fan blade; 717, center axis; 718, active bevel gear; 719, driven bevel gear; 720, eccentric rod; 721, lifting slide rod; 722, knocking sleeve; 723, support rod; 8, output pipe; 9, fan; 10, air supply pipe. DETAILED DESCRIPTION

[0018] In order to deepen the understanding of the present invention, the present invention will be further described in detail below in conjunction with examples. The examples are only used to explain the present invention and do not constitute a limitation on the protection scope of the present invention.

[0019] according to Figures 1-10 As shown, this embodiment proposes a metal casting casting waste heat recovery and utilization device, comprising The recovery input mechanism 1 comprises a recovery cover 101 and a delivery pipe 102, wherein the delivery pipe 102 is provided with a high-temperature output pipe 114 and a low-temperature output pipe 115; A recovery pipe 2 connected to the high temperature output pipe 114; a frame 3; The high temperature section recovery mechanism 4 installed on the frame 3 includes a waste heat recovery box 401 connected to the recovery pipe 2, a buffer box 402 arranged on the top of the waste heat recovery box 401, and a heat exchange box 403 arranged on the top of the buffer box 402. The waste heat recovery box 401 is provided with an evaporative heat absorbing component, and the heat exchange box 403 is provided with a storage tank B408 for the steam to flow into after the evaporative heat absorbing component absorbs heat; The medium and low temperature section recovery mechanism 5 is arranged on one side of the frame 3, and includes an air supply pipe section A 503 and an air supply pipe section B 504 connected to the heat exchange box 403, the air inlet end of the air supply pipe section A 503 is connected to the circulation box 505, the flue gas output end of the waste heat recovery box 401 is connected to the input pipe 6, and a primary heat absorbing component installed on the input pipe 6 is arranged between the air supply pipe section A 503 and the air supply pipe section B 504; and The spray treatment tower 7 comprises a tower body 701 connected to the input pipe 6 and a spray part arranged in the tower body 701. The outlet end of the low-temperature output pipe 115 is connected to the tower body 701 through a connecting pipe. The inner wall of the tower body 701 is connected to a fixing ring 706. The bottom of the fixing ring 706 is connected to a filter plate 708 through a spring telescopic rod 707. A cleaning part is installed at the bottom of the filter plate 708. A knocking sleeve 722 is provided on the top of the filter plate 708. A lifting part is installed in the tower body 701 to drive the knocking sleeve 722 to lift and lower. By adopting the above scheme, the recovery hood 101 is accurately aligned with the waste heat recovery point after the metal casting is poured. The recovery hood 101 can be set at different processing points during use to ensure that the high-temperature flue gas is introduced into the recovery hood 101. The combustion-supporting air that has been purified externally can be introduced from the circulation box 505. When the device is working, the high-temperature flue gas flows into the recovery pipe 2 from the high-temperature output pipe 114 on the conveying pipe 102, and then enters the waste heat recovery box 401 to recover sensible heat. The low-temperature flue gas flows into the tower body 701 from the low-temperature output pipe 115; in the waste heat recovery box 401, the evaporating heat absorbing component absorbs the heat of the high-temperature flue gas and converts it into steam. The steam then flows into the heat exchange box 403 to prepare for heat exchange with subsequent air. The flue gas passes through the waste heat recovery box 4 01 flows into the input pipe 6, the combustion air is preliminarily heated by the primary heat absorbing element, and the waste heat of the flue gas in the input pipe 6 is recovered, and then the air flows into the heat exchange box 403, the steam heats the air for a second time, and the heated air is transported to the combustion equipment through a dedicated pipeline; the flue gas enters the tower body 701, is sprayed by the spray element, and is filtered by the filter plate 708 at the same time, the pollutants in the flue gas are adsorbed, and the flue gas is discharged from the tower body 701; the lifting element periodically drives the knocking sleeve 722 to move up and down, knocks the filter plate 708, the spring telescopic rod 707 drives the filter plate 708 to rebound, and the filter plate 708 vibrates, prompting the particulate matter to be shaken off, and the cleaning element cooperates to clean the residue attached to the bottom of the filter plate 708.

[0020] like Figures 8-10As shown in the figure, the recycling input mechanism 1 further includes a temperature control pipe 104 installed on the recycling cover 101, and a protective cover is installed on the top of the recycling cover 101; a first plunger 110 and a second plunger 112 are slidably arranged in the conveying pipe 102, and the first plunger 110 and the second plunger 112 are connected by an adapter column 111. The distance between the high-temperature output pipe 114 and the low-temperature output pipe 115 is greater than the length of the adapter column 111. A spring 113 installed in the conveying pipe 102 is arranged on the side of the second plunger 112 away from the adapter column 111. A temperature control toggle member for driving the first plunger 110 to move horizontally is arranged on the top of the recycling cover 101; Among them, the temperature control toggle member includes a right-handed spiral bimetal sheet 121 installed in the temperature control pipe 104. The bottom end of the right-handed spiral bimetal sheet 121 is connected to the bottom of the temperature control pipe 104. The top end of the right-handed spiral bimetal sheet 121 is connected to a universal coupling 122. The top end of the universal coupling 122 is connected to a rack 118. A guide cylinder 123 for stably lifting and guiding the rack 118 is installed on the top of the temperature control pipe 104. A toggle gear 119 meshing with the rack 118 is rotatably connected in the protective cover. A linkage gear 120 meshing with the toggle gear 119 is also rotatably connected in the protective cover. One side shaft end of the linkage gear 120 is connected to a drive disk 106. An eccentric part of the side of the drive disk 106 away from the linkage gear 120 is rotatably connected to a connecting rod 107. One end of the connecting rod 107 away from the drive disk 106 is rotatably connected to a horizontal rod 108. The horizontal rod 108 extends into the conveying pipe 102 and is rotatably connected to the side of the first plunger 110 away from the adapter column 111; The bottom of the conveying pipe 102 is connected to an air inlet pipe 103 extending into the recycling cover 101. The air inlet pipe 103 is placed at the bottom between the high-temperature output pipe 114 and the low-temperature output pipe 115; The outer layer of the right-handed spiral bimetal sheet 121 is a high-expansion layer, and the inner side of the right-handed spiral bimetal sheet 121 is a low-expansion layer; A pipe seat 105 for stably fixing the conveying pipe 102 is arranged on the top of the recycling cover 101. A guide seat 109 for stably supporting the sliding of the horizontal rod 108 is also arranged on the top of the recycling cover 101; The high-temperature output pipe 114 is connected to the recycling pipe 2 through a high-temperature pipeline 116; The connection pipe fitting includes a low-temperature pipeline 117 connected to the low-temperature output pipe 115. One end of the low-temperature pipeline 117 away from the low-temperature output pipe 115 is connected to one end of the input pipe 6 close to the tower body 701. Valves are connected to both the high-temperature pipeline 116 and the low-temperature pipeline 117; The valves can be selectively controlled to be closed or opened according to the gas flow situation in the pipeline; Specifically, when the temperature rises: the right-handed spiral bimetallic strip 121 (with the high expansion layer on the outside) is heated and expanded, driving the rack 118 to rise, driving the toggle gear 119 to rotate counterclockwise, the linkage gear 120 to rotate clockwise, the drive disk 106 to rotate eccentrically, the connecting rod 107 pushes the horizontal rod 108 to move right, the first plunger 110 and the second plunger 112 move right to compress the spring 113, open the high-temperature output pipe 114, and close the low-temperature output pipe 115; When cooling: the right-handed spiral bimetallic strip 121 contracts, and the spring 113 rebounds, the first plunger 110 and the second plunger 112 move leftward and reset, closing the high-temperature output pipe 114 and opening the low-temperature output pipe 115, realizing power-free temperature control diversion.

[0021] See also Figure 2 and Figure 3 The evaporative heat absorption component includes a plurality of storage tanks A404 arranged in the waste heat recovery box 401, a steam output pipe A405 extending into the buffer box 402, and a return pipe A406 connected to one side of the bottom of the buffer box 402. The tops of the plurality of storage tanks A404 are connected to the same steam output pipe A405 through pipelines, and the bottoms of the plurality of storage tanks A404 are connected to the same return pipe A406 through pipelines. A steam output pipe B407 extending into the heat exchange box 403 is installed on the top of the buffer box 402, and the top of the storage tank B408 is connected to the same steam output pipe B407 through a pipeline. A return pipe B409 extending into the heat exchange box 403 is connected to one side of the top of the buffer box 402, and the bottom of the storage tank B408 is connected to the same return pipe B409 through a pipeline; Specifically, softened water and other thermal media can be pre-placed in the storage tank A404. The high-temperature flue gas passes through the waste heat recovery box 401, and the thermal media (such as softened water) in the storage tank A404 is transformed from liquid to gas. The steam enters the buffer box 402 along the steam output pipe A405, and the thermal media in the buffer box 402 is also heated. Part of the steam condenses into liquid, and the steam in the buffer box 402 rises to the storage tank B408 in the heat exchange box 403. When the air flows in the heat exchange box 403, the storage tank B408 releases heat to the outside, and the steam in it condenses into liquid, and then flows to the buffer tank 402 through the return pipe B409. The liquid in the buffer box 402 is in common with the liquid in the storage tank A404, forming a cycle, completing the unidirectional heat conduction process of transferring heat from the high end to the low end, so as to perform efficient heat transfer and realize efficient recovery and utilization of flue gas waste heat.

[0022] See also Figure 2 The primary heat absorbing element includes a heat preservation sleeve 501 installed on the input pipe 6 and a serpentine coil 502 arranged between the heat preservation sleeve 501 and the input pipe 6, one end of the serpentine coil 502 is connected to the air supply pipe section A 503, and the other end is connected to the air supply pipe section B 504; Specifically, the serpentine coil 502 continues to recover the residual heat of the flue gas in the input pipe 6, thereby improving the energy utilization efficiency.

[0023] See also Figure 4 and Figure 6 The circulation box 505 is arranged at the bottom of the tower body 701, and the circulation box 505 is connected to the air supply pipe section A 503. A transmission shaft 507 is rotatably arranged in the circulation box 505. The outer wall of the transmission shaft 507 is connected to a plurality of arc-shaped moving blades 508, and the plurality of arc-shaped moving blades 508 are arranged in a circular array. One side of the circulation box 505 is connected to an oblique air inlet pipe 506, and the outlet end of the oblique air inlet pipe 506 corresponds to the concave part of the arc-shaped moving blade 508. Specifically, the oblique air intake pipe 506 intakes air into the circulation box 505, and the arc-shaped moving blades 508 are able to move after being impacted by the oblique flow of air. Several arc-shaped moving blades 508 rotate around the axis of the transmission shaft 507, and the air is then output from the air supply pipe section A 503.

[0024] See also Figure 4 , Figure 5 and Figure 6 The cleaning member includes a rotating column 710 rotatably mounted at the center of the filter disc 708, a lever 711 connected to one side of the rotating column 710, and a cleaning brush 712 connected to the lever 711 near the filter disc 708. A square hole 713 is provided in the rotating column 710, a square rod 714 is slidably penetrated in the square hole 713, a transmission rod 715 is connected to the bottom of the square rod 714, the transmission rod 715 is rotatably connected to the tower body 701, and the bottom of the transmission rod 715 extends to the circulation box 505 and is connected to the transmission shaft 507; Specifically, the transmission shaft 507 rotates to drive the transmission rod 715 to rotate, thereby driving the square rod 714 to rotate, and the square rod 714 drives the rotating column 710 to rotate. When the filter plate 708 floats up and down, the square rod 714 slides in the square hole 713 without affecting the rotation drive of the rotating column 710. The lever 711 can rotate around the axis of the rotating column 710, so that the cleaning brush 712 cleans the bottom of the filter plate 708 to ensure the efficiency of smoke circulation.

[0025] See also Figure 4 and Figure 7 The top of the tower body 701 is connected to the mounting tube 702, the mounting tube 702 is rotatably connected to the central axis 717 through the bracket, and the top of the central axis 717 is connected to the axial flow fan blade 716; Specifically, when the smoke is drawn out of the tower body 701 , the flowing air drives the axial flow blades 716 to rotate.

[0026] See also Figure 4 and Figure 7, the inner wall of the tower body 701 is connected to the sealing cylinder 703 through a support rod 723. The central shaft 717 is rotatably connected to the sealing cylinder 703 and extends into the sealing cylinder 703 to connect the driving bevel gear 718. A driven bevel gear 719 meshing with the driving bevel gear 718 is rotatably connected in the sealing cylinder 703. An eccentric rod 720 is rotatably connected to an eccentric position on one side of the driven bevel gear 719. The bottom end of the eccentric rod 720 is rotatably connected to a lifting slide rod 721, and the bottom of the lifting slide rod 721 passes through the sealing cylinder 703 to connect a knocking sleeve 722; During the rotation of the axial flow fan blade 716, it will drive the driving bevel gear 718 to rotate, thereby driving the driven bevel gear 719 to rotate. Driven by the rotation of the eccentric rod 720, the lifting slide rod 721 slides reciprocally, and the knocking sleeve 722 moves up and down to knock on the filter disc 708. The spring telescopic rod 707 drives the filter disc 708 to rebound, and the filter disc 708 vibrates, prompting the particulate matter to be shaken off to prevent the particulate matter from blocking the filter holes.

[0027] Please refer to Figure 1 , one end of the installation pipe 702 away from the tower body 701 is connected to an output pipe 8. One end of the output pipe 8 away from the installation pipe 702 is connected to a fan 9, and the air outlet end of the fan 9 is connected to an air supply pipe 10; When the fan 9 works, it can create negative pressure in the output pipe 8 and the installation pipe 702 to suck the flue gas.

[0028] Please refer to Figure 4 , the spraying member includes a spraying pipe group 704 installed in the tower body 701. A liquid inlet pipe 705 communicating with the storage tank A 404 is installed on one side of the tower body 701, and one side of the bottom of the tower body 701 is connected to a liquid outlet pipe 709; Specifically, the spraying pipes of the spraying pipe group 704 can be set according to actual needs. As Figure 4 shown, without affecting the operation of other components, the spraying pipes in the spraying pipe group 704 can be set as a combination of a ring-shaped pipe and straight pipes arranged in a circumferential array. An alkaline solution or other spraying liquid can be input through the liquid inlet pipe 705. After the spraying liquid contacts the flue gas, it flows to the bottom inside the tower body 701 and is discharged from the liquid outlet pipe 709. The spraying liquid can be recycled, and the heat carried by the spraying liquid can also be recycled. Low-temperature flue gas (<100 °C) enters the tower body 701 through the low-temperature output pipe 115. The spraying pipe group 704 sprays an alkaline solution (pH 10 - 12) to neutralize acidic gases such as SO2 and HCl, and at the same time, the water mist captures PM2.5 particles. After spraying, the particulate matter removal rate ≥ 95%, and the acidic gas removal rate ≥ 85%.

[0029] Using the above metal casting pouring waste heat recovery and utilization device, the utilization method includes the following steps: S1. Accurately align the recovery hood 101 with the waste heat recovery point after the metal casting is cast. The recovery hood 101 can be set at different processing points during use to ensure that high-temperature flue gas is introduced into the recovery hood 101. The combustion-supporting air that has been purified externally can be introduced from the circulation box 505. When the device is working, the high-temperature flue gas flows into the recovery pipe 2 from the high-temperature output pipe 114 on the conveying pipe 102, and then enters the waste heat recovery box 401 to recover sensible heat, and the low-temperature flue gas flows into the tower body 701 from the low-temperature output pipe 115; accurately align the recovery hood 101 with the waste heat recovery point after the metal casting is cast, to ensure that high-temperature flue gas is introduced into the recovery hood 101, and the combustion-supporting air that has been purified externally can be introduced from the circulation box 505, and the oblique air intake pipe 506 intakes air into the circulation box 505. The arc-shaped moving blades 508 can move after being impacted by the oblique flow of air, and a plurality of arc-shaped moving blades 508 rotate around the axis of the transmission shaft 507, and the air Afterwards, it is output from the air supply pipe section A 503, the device works, the fan 9 works, and the negative pressure can be generated in the output pipe 8 and the installation pipe 702 to suck the smoke. The high-temperature smoke flows from the recovery cover 101 into the recovery pipe 2, and then enters the waste heat recovery box 401; when the temperature rises, the right-handed spiral bimetallic strip 121 (the high expansion layer is outside) is heated and expanded, driving the rack 118 to rise, driving the toggle gear 119 to rotate counterclockwise, the linkage gear 120 to rotate clockwise, the drive disk 106 to rotate eccentrically, the connecting rod 107 pushes the horizontal rod 108 to move right, the first plunger 110 and the second plunger 112 move right to compress the spring 113, open the high-temperature output pipe 114, and close the low-temperature output pipe 115; when the temperature drops, the right-handed spiral bimetallic strip 121 contracts, and the spring 113 rebounds at the same time, the first plunger 110 and the second plunger 112 move left to reset, close the high-temperature output pipe 114, and open the low-temperature output pipe 115; S2. In the waste heat recovery box 401, the storage tank A404 can be pre-placed with softened water and other hot working media. The high-temperature flue gas passes through the waste heat recovery box 401, and the hot working media (such as softened water) in the storage tank A404 is transformed from liquid to gas. The steam enters the buffer box 402 along the steam output pipe A405. The hot working media in the buffer box 402 is also heated, and part of the steam condenses into liquid. The steam in the buffer box 402 rises to the storage tank B408 in the heat exchange box 403. When the air flows in the heat exchange box 403, the storage tank B408 releases heat to the outside, and the steam in it condenses into liquid. Then it flows to the buffer box 402 through the return pipe B409. The liquid in the buffer box 402 is in common with the liquid in the storage tank A404 to form a cycle, completing the one-way heat conduction process of transferring heat from the high end to the low end, so as to perform efficient heat transfer and realize the efficient recovery and utilization of flue gas waste heat. The flue gas flows to the input pipe 6 through the waste heat recovery box 401, and the serpentine coil 502 continues to recover the residual heat of the flue gas in the input pipe 6, recovering the waste heat of the flue gas in the input pipe 6. Then the air flows to the heat exchange box 403, and the steam heats the air for a second time. The heated air is transported to the combustion equipment through a dedicated pipeline; S3. The flue gas enters the tower body 701, is sprayed by the spraying member, and at the same time is filtered by the filter disc 708 to adsorb the pollutants in the flue gas, and then the flue gas is discharged from the tower body 701; S4. When the pumped flue gas flows out of the tower body 701, the flowing air drives the rotation of the axial flow fan blade 716. During the rotation of the axial flow fan blade 716, the driving bevel gear 718 is driven to rotate, thereby driving the driven bevel gear 719 to rotate. Driven by the rotation of the eccentric rod 720, the lifting slide rod 721 slides reciprocally, periodically driving the knocking sleeve 722 to move up and down to knock the filter disc 708. The spring telescopic rod 707 drives the filter disc 708 to rebound, and the filter disc 708 vibrates, prompting the particulate matter to be shaken off. The transmission shaft 507 rotates, driving the transmission rod 715 to rotate, thereby driving the square rod 714 to rotate. The square rod 714 drives the rotating column 710 to rotate. When the filter disc 708 floats up and down, the square rod 714 slides in the square hole 713, without affecting the rotation drive of the rotating column 710 at the same time. The lever 711 can rotate around the axis of the rotating column 710, so that the cleaning brush 712 cleans the bottom of the filter disc 708 to ensure the flue gas circulation efficiency.

[0030] The foregoing has shown and described the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification are only used to illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for recovering and utilizing waste heat from metal casting, characterized in that: include: A recovery input mechanism (1), comprising a recovery cover (101) and a delivery pipe (102), wherein the delivery pipe (102) is provided with a high-temperature output pipe (114) and a low-temperature output pipe (115); A recovery pipe (2) connected to the high-temperature output pipe (114); Rack (3); A high-temperature section recovery mechanism (4) installed on the frame (3), comprising a waste heat recovery box (401) connected to the recovery pipe (2), a buffer box (402) arranged on the top of the waste heat recovery box (401), and a heat exchange box (403) arranged on the top of the buffer box (402), wherein an evaporative heat absorbing element is arranged in the waste heat recovery box (401), and a storage tank B (408) is arranged in the heat exchange box (403) for the steam to flow into after the evaporative heat absorbing element absorbs heat; A medium and low temperature section recovery mechanism (5) is arranged on one side of the frame (3), comprising an air supply pipe section A (503) and an air supply pipe section B (504) connected to the heat exchange box (403), wherein the air inlet end of the air supply pipe section A (503) is connected to the circulation box (505), the smoke output end of the waste heat recovery box (401) is connected to the input pipe (6), and a primary heat absorbing component installed on the input pipe (6) is provided between the air supply pipe section A (503) and the air supply pipe section B (504); and A spray treatment tower (7) comprises a tower body (701) connected to an input pipe (6) and a spray component arranged in the tower body (701); the gas outlet end of the low-temperature output pipe (115) is connected to the tower body (701) via a connecting pipe; the inner wall of the tower body (701) is connected to a fixing ring (706); the bottom of the fixing ring (706) is connected to a filter plate (708) via a spring telescopic rod (707); a cleaning component is installed at the bottom of the filter plate (708); a knocking sleeve (722) is provided at the top of the filter plate (708); and a lifting component is installed in the tower body (701) for driving the knocking sleeve (722) to move up and down reciprocatingly.

2. The device for recovering and utilizing waste heat from metal casting according to claim 1, characterized in that: The evaporative heat absorption component comprises a plurality of storage tanks A (404) arranged in a waste heat recovery box (401), a steam output pipe A (405) extending into the buffer box (402), and a return pipe A (406) connected to one side of the bottom of the buffer box (402); the tops of the plurality of storage tanks A (404) are connected to the same steam output pipe A (405) through pipelines; the bottoms of the plurality of storage tanks A (404) are connected to the same return pipe A (406) through pipelines; a steam output pipe B (407) extending into the heat exchange box (403) is installed on the top of the buffer box (402); the top of the storage tank B (408) is connected to the same steam output pipe B (407) through a pipeline; the top of the buffer box (402) is connected to a return pipe B (409) extending into the heat exchange box (403); and the bottom of the storage tank B (408) is connected to the same return pipe B (409) through a pipeline.

3. The device for recovering and utilizing waste heat from metal casting according to claim 1, characterized in that: The recovery input mechanism (1) further comprises a temperature control tube (104) mounted on the recovery cover (101), and a protective cover is mounted on the top of the recovery cover (101); a first plunger (110) and a second plunger (112) are slidably mounted in the delivery tube (102); the first plunger (110) and the second plunger (112) are connected via a connecting column (111); the distance between the high-temperature output tube (114) and the low-temperature output tube (115) is greater than the length of the connecting column (111); a spring (113) mounted in the delivery tube (102) is disposed on a side of the second plunger (112) away from the connecting column (111); and a temperature control toggle member for driving the first plunger (110) to move horizontally is disposed on the top of the recovery cover (101); The temperature control toggle member comprises a right-handed spiral bimetallic strip (121) installed in the temperature control tube (104); the bottom end of the right-handed spiral bimetallic strip (121) is connected to the bottom of the temperature control tube (104); the top end of the right-handed spiral bimetallic strip (121) is connected to a universal coupling (122); the top end of the universal coupling (122) is connected to a rack (118); a guide cylinder (123) for guiding the rack (118) to stably rise and fall is installed on the top of the temperature control tube (104); a toggle gear (119) meshing with the rack (118) is rotatably connected in the protective cover; a linkage gear (120) meshing with the toggle gear (119) is also rotatably connected in the protective cover; a shaft end of one side of the linkage gear (120) is connected to a drive disk ( 106), the eccentric part of the driving disk (106) away from the linkage gear (120) is rotatably connected to the connecting rod (107), the end of the connecting rod (107) away from the driving disk (106) is rotatably connected to the horizontal rod (108), the horizontal rod (108) extends into the delivery pipe (102) and is rotatably connected to the side of the first plunger (110) away from the connecting column (111); the bottom of the delivery pipe (102) is connected to an air intake pipe (103) extending into the recovery cover (101), and the air intake pipe (103) is placed at the bottom between the high-temperature output pipe (114) and the low-temperature output pipe (115); the outer layer of the right-handed spiral bimetallic strip (121) is a high-expansion layer, and the inner side of the right-handed spiral bimetallic strip (121) is a low-expansion layer.

4. The device for recovering and utilizing waste heat from metal casting according to claim 3, characterized in that: The primary heat absorbing element comprises a heat-insulating sleeve (501) mounted on the input pipe (6) and a serpentine coil (502) arranged between the heat-insulating sleeve (501) and the input pipe (6), wherein one end of the serpentine coil (502) is connected to section A of the air supply pipe (503) and the other end is connected to section B of the air supply pipe (504); The circulation box (505) is arranged at the bottom of the tower body (701), and the circulation box (505) is connected to the air supply pipe section A (503). A transmission shaft (507) is rotatably arranged in the circulation box (505). The outer wall of the transmission shaft (507) is connected to a plurality of arc-shaped moving blades (508), and the plurality of arc-shaped moving blades (508) are arranged in a circular array. One side of the circulation box (505) is connected to an oblique air inlet pipe (506), and an air outlet end of the oblique air inlet pipe (506) corresponds to a concave portion of the arc-shaped moving blade (508).

5. The device for recovering and utilizing waste heat from metal casting according to claim 4, characterized in that: The cleaning member comprises a rotating column (710) rotatably mounted at the center of the filter disc (708), a lever (711) connected to one side of the rotating column (710), and a cleaning brush (712) connected to the side of the lever (711) close to the filter disc (708); a square hole (713) is provided in the rotating column (710); a square rod (714) is slidably inserted into the square hole (713); the bottom of the square rod (714) is connected to a transmission rod (715); the transmission rod (715) is rotatably connected to the tower body (701), and the bottom of the transmission rod (715) extends into the circulation box (505) to be connected to the transmission shaft (507).

6. The device for recovering and utilizing waste heat from metal casting according to claim 1, characterized in that: The top of the tower body (701) is connected to a mounting tube (702), the mounting tube (702) is rotatably connected to a central shaft (717) via a bracket, and the top of the central shaft (717) is connected to an axial flow fan blade (716); The inner wall of the tower body (701) is connected to the sealing cylinder (703) via a support rod (723); the central shaft (717) is rotatably connected to the sealing cylinder (703) and extends into the sealing cylinder (703) to be connected to an active bevel gear (718); a driven bevel gear (719) meshing with the active bevel gear (718) is rotatably connected to the sealing cylinder (703); an eccentric portion of one side of the driven bevel gear (719) is rotatably connected to an eccentric rod (720); the bottom end of the eccentric rod (720) is rotatably connected to a lifting slide rod (721); and the bottom of the lifting slide rod (721) passes through the sealing cylinder (703) to be connected to a knocking sleeve (722).

7. The device for recovering and utilizing waste heat from metal casting according to claim 3, characterized in that: A pipe seat (105) for stably fixing the delivery pipe (102) is provided at the top of the recovery cover (101), and a guide seat (109) for stably supporting the sliding of the horizontal rod (108) is also provided at the top of the recovery cover (101); the high-temperature output pipe (114) is connected to the recovery pipe (2) via a high-temperature pipe (116); the connecting pipe comprises a low-temperature pipe (117) connected to the low-temperature output pipe (115); an end of the low-temperature pipe (117) away from the low-temperature output pipe (115) is connected to an end of the input pipe (6) close to the tower body (701); and valves are connected to both the high-temperature pipe (116) and the low-temperature pipe (117).

8. The device for recovering and utilizing waste heat from metal casting according to claim 6, characterized in that: One end of the installation tube (702) away from the tower body (701) is connected to the output tube (8), one end of the output tube (8) away from the installation tube (702) is connected to the fan (9), and the air outlet end of the fan (9) is connected to the air supply tube (10).

9. The metal casting casting waste heat recovery and utilization device according to claim 1, characterized in that: The spraying component comprises a spraying pipe group (704) installed in a tower body (701); a liquid inlet pipe (705) connected to a storage tank A (404) is installed on one side of the tower body (701); and a liquid outlet pipe (709) is connected to one side of the bottom of the tower body (701).

10. A method for utilizing the metal casting casting waste heat recovery device according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1. The recovery hood (101) is accurately aligned with the waste heat recovery point after the metal casting is poured. During use, the recovery hood (101) is set at different processing points to ensure that the high-temperature flue gas is introduced into the recovery hood (101). The combustion-supporting air that has been purified externally is introduced from the circulation box (505). When the device is working, the high-temperature flue gas flows from the high-temperature output pipe (114) on the conveying pipe (102) into the recovery pipe (2), and then enters the waste heat recovery box (401) to recover sensible heat. The low-temperature flue gas flows from the low-temperature output pipe (115) into the tower body (701); S2. In the waste heat recovery box (401), the evaporative heat absorbing element absorbs the heat of the high-temperature flue gas and converts it into steam. The steam then flows into the heat exchange box (403) to prepare for heat exchange with subsequent air. The flue gas flows through the waste heat recovery box (401) to the input pipe (6). The combustion-supporting air passes through the primary heat absorbing element for preliminary heating to recover the waste heat of the flue gas in the input pipe (6). The air then flows into the heat exchange box (403), where the steam heats the air for a second time. The heated air is then transported to the combustion equipment through a dedicated pipeline. S3, the flue gas enters the tower body (701), is sprayed by the spraying element, and is filtered by the filter disc (708) to adsorb pollutants in the flue gas, and the flue gas is discharged from the tower body (701); S4, the lifting member periodically drives the knocking sleeve (722) to move up and down, knocking the filter plate (708), the spring telescopic rod (707) drives the filter plate (708) to rebound, the filter plate (708) vibrates, causing the particles to be shaken off, and the cleaning member cooperates to clean the residue attached to the bottom of the filter plate (708).

Images