A system for utilizing the residual heat of a forged piece

Abstract

This utility model relates to a waste heat utilization system for forging parts, including a forging furnace body, a waste heat utilization box, and a chimney. The circulating water outlet pipe of the waste heat utilization box is connected to the water inlet of the heat exchange tube of the forging furnace body through a first pipe. A water pump is installed on the first pipe. The water outlet of the heat exchange tube is connected to the circulating water inlet pipe through a second pipe. The exhaust pipe is connected to the flue gas duct inlet through a third pipe. The exhaust outlet of the flue gas duct is connected to the chimney inlet through a fourth pipe. This utility model replenishes cold water into the waste heat utilization box through a water supply pipe, and the cold water is pumped to the heat exchange tube. The high-temperature combustion heat in the heat exchange chamber of the forging furnace body heats the cold water. The hot water flows back to the waste heat utilization box for storage and utilization through the second pipe. Simultaneously, the high-temperature flue gas discharged from the forging furnace body enters the flue gas duct through the third pipe, and the high-temperature flue gas assists in heating the hot water in the waste heat utilization box, keeping the hot water at a high temperature and improving the waste heat utilization rate.

Description

Technical Field

[0001] This utility model relates to the field of forging processing technology, specifically to a system for utilizing the waste heat of forging parts. Background Technology

[0002] Forging heating furnaces are an improvement on the original reverberatory furnaces used in forging. They are furnaces that use coal gas generated by a gas generator to burn and heat the forgings. There are many types of existing forging furnaces. With the development of industrial manufacturing technology, the demand for the utilization of waste heat in forging manufacturing is increasing. In the traditional forging process, a large amount of waste heat is generated. If this waste heat is not utilized, it will lead to energy waste and environmental pollution.

[0003] Patent CN202020685639.9 discloses a forging waste heat utilization device, including a forging furnace. Four supports are fixedly connected to the bottom of the forging furnace. A cover door is hinged to the front of the forging furnace. A heat insulation sleeve is snapped onto the left side wall of the forging furnace. A heat transfer pipe is fixedly connected to the left end of the heat insulation sleeve. The left end of the heat transfer pipe is fixedly connected to the input end of a transfer pump. A docking pipe is fixedly connected to the output end of the transfer pump on the left side. A waste heat furnace is snapped onto the outside of the docking pipe. This forging waste heat utilization device has a simplified overall structure and can effectively recover and utilize the waste heat dissipated during forging processing. Simultaneously, the device has strong insulation capabilities, effectively preventing waste heat loss, thus effectively solving the problem of the large amount of waste heat generated during forging production being difficult to recover and having poor insulation.

[0004] However, when this patent is used, it only recovers the combustion heat of the forging furnace through the heat insulation sleeve, but does not recover and utilize the heat in the high-temperature flue gas generated by the forging furnace during combustion, which still results in a waste of heat. Utility Model Content

[0005] This invention addresses the shortcomings of existing technologies by providing a waste heat recovery system for forging parts, thereby further improving the heat recovery and utilization rate.

[0006] This utility model is achieved through the following technical solution: a waste heat utilization system for forging parts, comprising a forging furnace body, a waste heat utilization box, and a chimney. The forging furnace body includes an outer shell and an inner furnace body, forming a heat exchange chamber between the outer shell and the inner furnace body. A heat exchange tube is fixedly installed inside the heat exchange chamber, and the inlet and outlet of the heat exchange tube extend to the outside of the outer shell. A flue pipe is fixedly connected to the outer shell and communicates with the inner furnace body. The waste heat utilization box includes a box body and a flue gas pipe fixed inside the box body, with the inlet and outlet of the flue gas pipe being... The exhaust port extends to the outside of the housing. The housing is also fixedly connected to a water supply pipe, a drain pipe, a circulating water inlet pipe, and a circulating water outlet pipe. Switch valve five and switch valve six are respectively installed on the water supply pipe and the drain pipe. The circulating water outlet pipe is connected to the inlet of the heat exchange tube through a first pipe. A water pump is installed on the first pipe. The outlet of the heat exchange tube is connected to the circulating water inlet pipe through a second pipe. The exhaust pipe is connected to the inlet of the flue gas duct through a third pipe. The exhaust port of the flue gas duct is connected to the inlet of the chimney through a fourth pipe.

[0007] This solution involves supplying cold water to the waste heat recovery tank via a water supply pipe. A water pump then transports the cold water to the heat exchange tubes. The high-temperature combustion heat transferred from the forging furnace body to the heat exchange chamber heats the cold water in the heat exchange tubes. The hot water then flows back to the waste heat recovery tank for storage and reuse via a second pipeline. Simultaneously, the high-temperature flue gas discharged from the forging furnace body enters the flue gas duct through a third pipeline. This high-temperature flue gas further heats the hot water in the waste heat recovery tank, maintaining its high temperature and thus utilizing the heat from the flue gas to improve waste heat utilization efficiency.

[0008] As an optimization, heating device one and heating device two are connected to the first pipeline. In this optimized scheme, the hot water medium in the waste heat utilization tank passes through heating device one and heating device two, where the heat is further utilized.

[0009] As an optimization, heating equipment 1 and heating equipment 2 are respectively equipped with switch valve 1 and switch valve 2 at their front ends. Heating equipment 1 has a diversion pipe 1 on its side, with its inlet connected to the front end of switch valve 1 and its outlet connected to the rear end of heating equipment 1. Heating equipment 2 has a diversion pipe 2 on its side, with its inlet connected between switch valve 2 and the outlet of diversion pipe 1, and its outlet connected to the rear end of heating equipment 2. Switch valve 3 and switch valve 4 are respectively installed on diversion pipe 1 and diversion pipe 2. This optimized solution, by separately setting diversion pipe 1 and diversion pipe 2 and controlling each diversion pipe with its respective switch valve, allows for the control and utilization of each heating equipment, making it flexible and convenient to use.

[0010] As an optimization, the heat exchange tubes are coiled, with the tubes coiled around the outer side of the inner furnace body. This optimized coiled structure increases the heat absorption area of ​​the heat exchange tubes, thereby improving the heat absorption effect and energy utilization.

[0011] As an optimization, a heat insulation layer is fixed to the inner wall of the outer shell. This optimization reduces heat loss, improves insulation performance, and prevents accidental burns from contact.

[0012] As an optimization, a vent pipe is also fixedly connected to the housing, and a pressure relief valve is installed on the vent pipe. This optimized solution releases pressure by venting hot gas through the vent pipe, preventing excessive heating pressure.

[0013] As an optimization, an insulation layer is fixed to the outer wall of the enclosure. This optimization solution uses the insulation layer to keep the enclosure warm, reducing heat loss, improving heating efficiency, and increasing energy utilization.

[0014] As an optimization, the flue gas duct has a corrugated structure. This optimized corrugated flue gas duct increases the contact area with the medium inside the chamber, thereby improving heat exchange efficiency and effectiveness, and increasing energy utilization.

[0015] As an optimization, heat dissipation fins are fixed to the outer wall of the flue gas duct. This optimization scheme accelerates heat transfer efficiency through heat dissipation fins, further improving heat exchange efficiency.

[0016] As an optimization, a flue gas filter is installed on the third pipeline. In this optimized solution, the flue gas discharged from the forging furnace body enters the flue gas duct after being filtered by the flue gas filter through the third pipeline, thus improving environmental friendliness.

[0017] The beneficial effects of this invention are as follows: Cold water is added to the waste heat utilization tank through a water supply pipe, and the cold water is transported to the heat exchange tube by a water pump. The high-temperature combustion heat transferred to the heat exchange chamber by the forging furnace body heats the cold water in the heat exchange tube. The hot water flows back to the waste heat utilization tank for storage and utilization through a second pipeline. At the same time, the high-temperature flue gas discharged from the forging furnace body enters the flue gas duct through a third pipeline, and the high-temperature flue gas assists in heating the hot water in the waste heat utilization tank, keeping the hot water at a high temperature, thus realizing the utilization of the heat from the flue gas and improving the waste heat utilization rate.

[0018] When the hot water medium output from the waste heat recovery box passes through heating equipment one and heating equipment two, the heat is initially utilized by these two systems. For example, heating equipment one and heating equipment two can be configured as two sets of radiators to provide indoor heating. By separately setting up branch pipe one and branch pipe two, and controlling each heating device through its respective on / off valve, the utilization of each device can be controlled, making it flexible and convenient to use. Attached Figure Description

[0019] Figure 1 This is a flowchart of the present utility model;

[0020] Figure 2 This is a cross-sectional view of the forging furnace;

[0021] Figure 3 This is a cross-sectional view of the waste heat recovery box;

[0022] As shown in the figure:

[0023] 1. Forging furnace body; 11. Outer shell; 12. Inner furnace body; 13. Insulation layer; 14. Heat exchange chamber; 15. Heat exchange tube;

[0024] 2. Waste heat recovery box; 21. Box body; 22. Flue gas duct; 23. Insulation layer; 24. Heat dissipation fins; 25. Circulating water inlet pipe; 26. Circulating water outlet pipe; 27. Water supply pipe; 28. Drain pipe; 29. ​​Vent pipe; 20. Pressure relief valve; 31. Switch valve five; 32. Switch valve six.

[0025] 3. Water pump; 4. First pipeline; 5. Second pipeline; 6. Third pipeline; 7. Flue gas filter; 8. Fourth pipeline; 9. Chimney;

[0026] 33. Heating equipment one, 32. Heating equipment two, 35. Diversion pipe one, 36. Diversion pipe two, 37. Switch valve one, 38. Switch valve two, 39. Switch valve three, 40. Switch valve four. Detailed Implementation

[0027] To clearly illustrate the technical features of this solution, the following detailed implementation method will be used to explain the solution.

[0028] like Figures 1-3 As shown, a waste heat utilization system for forging parts includes a forging furnace body 1, a waste heat utilization box 2, and a chimney 9.

[0029] The forging furnace is hinged to a furnace cover at the front. The main body 1 of the forging furnace includes an outer shell 11 and an inner furnace body 12, with a heat exchange chamber 14 formed between the outer shell 11 and the inner furnace body 12. A heat exchange tube 15 is fixedly installed inside the heat exchange chamber 14. In this embodiment, the heat exchange tube 15 has a coiled structure, coiled around the outside of the inner furnace body 12, with its inlet and outlet extending to the outside of the outer shell 11. The heat exchange tube 15 absorbs the heat dissipated during forging within the inner furnace body 12, thus achieving the absorption and utilization of combustion heat. The coiled structure increases the heat absorption area of ​​the heat exchange tube, thereby improving the heat absorption effect and energy utilization efficiency.

[0030] A flue pipe 16 is fixedly connected to the outer shell 11, and the flue pipe 16 is connected to the inner furnace body 12. The flue gas generated by combustion in the furnace body is discharged through the flue pipe 16.

[0031] A heat insulation layer 13 is fixed to the inner wall of the outer casing 11. In this embodiment, the heat insulation layer 13 is a fiberglass board. By laying the heat insulation layer 13 on the inner wall of each side of the outer casing 11, heat loss to the outside is reduced, the heat preservation performance is improved, and burns caused by accidental contact can be avoided.

[0032] The waste heat recovery box 2 includes a box body 21 and a flue gas duct 22 fixed inside the box body 21. An insulation layer 23 is fixed to the outer wall of the box body 21. In this embodiment, the insulation layer 23 is XPS extruded board. The insulation layer 23 insulates the box body 21, reduces heat loss, improves heating effect, and improves energy utilization.

[0033] The flue gas duct 22 has a corrugated structure, and heat dissipation fins 24 are fixed to its outer wall. The inlet and outlet of the flue gas duct 22 extend to the outside of the housing 21. The corrugated flue gas duct increases the contact area with the medium, thereby improving heat exchange efficiency and effectiveness, and increasing energy utilization. The heat dissipation fins accelerate heat transfer efficiency, further improving heat exchange efficiency.

[0034] The housing 21 is also fixedly connected to a water supply pipe 27, a drain pipe 28, a circulating water inlet pipe 25, and a circulating water outlet pipe 26. Switch valves 31 and 32 are respectively installed on the water supply pipe 27 and drain pipe 28. A vent pipe 29 is also fixedly connected to the housing 21, and a pressure relief valve 30 is installed on the vent pipe 29. Heat exchange medium is added to the housing 21 through the water supply pipe 27, and the medium is discharged through the drain pipe 28. The circulating water inlet and outlet pipes facilitate the circulation of the medium for heat exchange. The vent pipe discharges hot air to relieve pressure and prevent excessive heating.

[0035] Specifically, the circulating water outlet pipe 26 is connected to the inlet of the heat exchange pipe 15 through the first pipe 4. A water pump 3 is installed on the first pipe 4. The outlet of the heat exchange pipe 15 is connected to the circulating water inlet pipe 25 through the second pipe 5.

[0036] The heat exchange medium in the first pipeline 4 is transported to the heat exchange tube 15 by the water pump 3. After being heated in the heat exchange chamber 14, the medium flows back to the waste heat utilization box 2 through the second pipeline 5 for storage and utilization, thereby realizing the recycling of the heat generated during forging.

[0037] In this embodiment, heating device 1 33 and heating device 2 34 are also connected to the first pipeline 4. Switch valve 1 37 and switch valve 2 38 are respectively installed at the front ends of heating device 1 33 and heating device 2 34. A diversion pipeline 1 35 is provided on the side of heating device 1 33. The inlet end of diversion pipeline 1 35 is connected to the front end of switch valve 1 37, and the outlet end of diversion pipeline 1 35 is connected to the rear end of heating device 1 33.

[0038] The heating equipment 2 34 has a branch pipe 2 36 on its side. The inlet of branch pipe 2 36 is connected between the switch valve 2 38 and the outlet of branch pipe 1 35, and the outlet of branch pipe 2 36 is connected to the rear end of heating equipment 2 34. Switch valve 3 39 and switch valve 40 are respectively installed on branch pipe 1 35 and branch pipe 2 36.

[0039] When the hot water medium output from the waste heat recovery box 2 passes through heating equipment 1 33 and heating equipment 2 34, the heat is initially utilized by heating equipment 1 and heating equipment 2. For example, heating equipment 1 and heating equipment 2 can be two sets of radiators to achieve indoor heating.

[0040] By setting up separate branch pipes one and two, and controlling each heating device through its respective on / off valve, the system can be used flexibly and conveniently.

[0041] For example, when switch valve 1 37 and switch valve 2 38 are opened, and switch valve 3 39 and switch valve 40 are closed, heating equipment 1 33 and heating equipment 2 34 can be heated and utilized simultaneously.

[0042] When switch valve 1 37 and switch valve 40 are opened, and switch valve 2 38 and switch valve 3 39 are closed, heating can be applied only to heating equipment 1 33.

[0043] When switch valve 2 38 and switch valve 39 are opened, and switch valve 1 37 and switch valve 40 are closed, heating can be applied only to heating equipment 2 34.

[0044] When switch valve 39 and switch valve 40 are opened, and switch valve 1 and switch valve 2 are closed, hot water can be directly sent back to waste heat utilization box 2 without heating heating equipment 1 33 and heating equipment 2 34.

[0045] The exhaust pipe 16 is connected to the inlet of the flue gas duct 22 via a third pipe 6, and a flue gas filter 7 is installed on the third pipe 6. The exhaust port of the flue gas duct 22 is connected to the inlet of the chimney 9 via a fourth pipe 8.

[0046] In this embodiment, the flue gas filter 7 can be a self-cleaning flue gas filter provided by patent CN216778263U, which makes it easy to clean impurities after filtering the flue gas.

[0047] The flue gas discharged from the forging furnace body 1 enters the flue gas duct 22 after being filtered by the flue gas filter 7 through the third pipeline 6. The high-temperature flue gas assists in heat exchange with the water in the waste heat recovery box 2, thereby realizing the recovery and utilization of the heat from the flue gas.

[0048] Working principle: During use, cold water is added to the waste heat utilization tank 2 through the water supply pipe 27. The cold water is then pumped to the heat exchange tube 15 by the water pump 3. The high-temperature heat transferred from the inner furnace body 12 to the heat exchange chamber 14 heats the cold water in the heat exchange tube 15. The hot water then flows back to the waste heat utilization tank 2 through the second pipe 5 for storage and utilization. Simultaneously, the high-temperature flue gas discharged from the forging furnace body 1 enters the flue gas pipe 22 through the third pipe 6, providing auxiliary heating to the hot water in the waste heat utilization tank 2 to maintain its high temperature. After being filtered by the flue gas filter 7, the flue gas is discharged from the chimney 9, making it more environmentally friendly. The hot water in the waste heat utilization tank 2 is then heated for heating after passing through heating equipment 1 33 and heating equipment 2 34.

[0049] Of course, the above description is not limited to the examples above. Technical features of this utility model not described can be implemented by or using existing technology, and will not be repeated here. The above embodiments and drawings are only used to illustrate the technical solution of this utility model and are not intended to limit this utility model. This utility model has been described in detail with reference to preferred embodiments. Those skilled in the art should understand that any changes, modifications, additions or substitutions made by those skilled in the art within the scope of this utility model do not depart from the spirit of this utility model and should also fall within the protection scope of the claims of this utility model.

Claims

1. A system for utilizing residual heat of a forged product, comprising a forge furnace main body (1), a residual heat utilization tank (2), and a chimney (9), characterized in that: The forging furnace body (1) includes an outer shell (11) and an inner furnace body (12). A heat exchange chamber (14) is formed between the outer shell (11) and the inner furnace body (12). A heat exchange tube (15) is fixedly installed in the heat exchange chamber (14). The inlet and outlet of the heat exchange tube (15) extend to the outside of the outer shell (11). A flue pipe (16) is fixedly connected to the outer shell (11). The flue pipe (16) is connected to the inner furnace body (12). The waste heat utilization box (2) includes a box body (21) and a flue gas pipe (22) fixed inside the box body. The flue gas pipe (22) has an inlet and an outlet that extend to the outside of the box body (21). The box body (21) is also fixed with a water supply pipe (27), a drain pipe (28), a circulating water inlet pipe (25), and a circulating water outlet pipe (26). The water supply pipe (27) and the drain pipe (28) are respectively equipped with a switch valve five (31) and a switch valve six (32). The circulating water outlet pipe (26) is connected to the inlet of the heat exchange pipe (15) through the first pipe (4). A water pump (3) is installed on the first pipe (4). The outlet of the heat exchange pipe (15) is connected to the circulating water inlet pipe (25) through the second pipe (5). The flue pipe (16) is connected to the inlet of the flue gas pipe (22) through the third pipe (6). The flue gas pipe (22) is connected to the inlet of the chimney (9) through the fourth pipe (8).

2. The system for utilizing residual heat of a forged piece according to claim 1, characterized by: Heating equipment one (33) and heating equipment two (34) are connected to the first pipeline (4).

3. The waste heat recovery system for forgings according to claim 2, characterized in that: The front ends of heating equipment 1 (33) and heating equipment 2 (34) are respectively equipped with switch valve 1 (37) and switch valve 2 (38). The side of heating equipment 1 (33) is provided with a diversion pipe 1 (35). The inlet end of diversion pipe 1 (35) is connected to the front end of switch valve 1 (37), and the outlet end of diversion pipe 1 (35) is connected to the rear end of heating equipment 1 (33). The side of heating equipment 2 (34) is provided with a diversion pipe 2 (36). The inlet end of diversion pipe 2 (36) is connected between switch valve 2 (38) and the outlet end of diversion pipe 1 (35), and the outlet end of diversion pipe 2 (36) is connected to the rear end of heating equipment 2 (34). Switch valve 3 (39) and switch valve 4 (40) are respectively installed on diversion pipe 1 (35) and diversion pipe 2 (36).

4. The system for utilizing residual heat of a forged piece according to claim 1, characterized by: The heat exchange tube (15) is a coil structure, with the heat exchange tube coiled around the outside of the inner furnace body (12).

5. The waste heat recovery system for forgings according to claim 1, characterized in that: A heat insulation layer (13) is fixed to the inner wall of the outer shell (11).

6. The system for utilizing residual heat of a forged piece according to claim 1, characterized by: A vent pipe (29) is also fixedly connected to the housing (21), and a pressure relief valve (30) is installed on the vent pipe (29).

7. The system for utilizing residual heat of a forged piece according to claim 1, characterized by: An insulation layer (23) is fixed to the outer wall of the box (21).

8. The system for utilizing residual heat of a forged piece according to claim 1, characterized by: The flue gas duct (22) has a wavy structure.

9. The waste heat recovery system for forgings according to claim 1 or 8, characterized in that: Heat dissipation fins (24) are fixed to the outer wall of the flue gas duct (22).

10. The system for utilizing the residual heat of a forged piece according to claim 1, characterized by: A flue gas filter (7) is installed on the third pipeline (6).

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