A waste heat recovery device for a natural gas forging heating furnace

Abstract

The utility model relates to the technical field of waste heat recovery of heating furnaces, and specifically relates to a waste heat recovery device for a natural gas forging heating furnace, comprising a heating furnace body and a heat exchange box. The heating furnace body is connected to the heat exchange box through a connecting pipe, a sealing cover is installed on the upper top of the heat exchange box, a water outlet and an air outlet are arranged on the side of the heat exchange box, and a filter plate is installed inside the heat exchange box. When in use, the natural gas introduced into the heating furnace body is mixed with air and fully burned, and the generated waste gas with waste heat will enter the heat exchange box through the connecting pipe, and continuously supply cold water to a liquid separation cavity through a three-way pipe. After the water channel is divided, water mist is sprayed into the heat exchange box through a water mist nozzle, so that a water mist area is created in the uppermost cavity area inside the heat exchange box. During the process of the waste heat exhaust gas passing through the water mist area, the waste gas with waste heat is in direct contact with the water mist, and fully heat is exchanged. Subsequently, the water mist falls into the lower part of the heat exchange box through the filter holes of the filter plate, and is discharged from the water outlet to be recovered, thereby ensuring that the waste heat of the waste gas is fully recovered.

Description

Technical Field

[0001] The utility model relates to the technical field of waste heat recovery of heating furnaces, in particular to a waste heat recovery device for a natural gas forging heating furnace. Background Art

[0002] Using natural gas as the heat source for the forging heating furnace realizes a diffuse combustion method, reduces the emission of nitrogen oxides, and achieves the purpose of energy conservation and environmental protection. The flue gas discharged by the natural gas forging heating furnace still contains a certain amount of waste heat. Recovering the waste heat can avoid the problem of energy waste.

[0003] For example, the Chinese patent with application number CN202021902462.X discloses a natural gas forging heating furnace. The utility model includes a forging chamber, a heating chamber, a support column and a bottom plate. A burner is fixedly arranged at the lower end of the inner wall of the heating chamber, a feed port and a discharge port are arranged on the forging chamber, a motor is fixedly installed at the upper end of the forging chamber, a stirring shaft is arranged inside the forging chamber, the output end of the motor passes through the forging chamber and is fixedly connected to the stirring shaft, a stirring blade is fixedly arranged on the stirring shaft, and the number of stirring blades is multiple, and multiple stirring blades are evenly distributed on the stirring shaft, which can recycle and reuse waste heat to avoid the problem of energy waste. However, in actual use, heat exchange is achieved through an intermediate medium, and the exhaust gas of the heating furnace is not in direct contact with water, so that the exhaust gas is discharged again before it can be fully exchanged with heat, resulting in insufficient recovery of waste heat. Utility Model Content

[0004] In view of this, the purpose of the utility model is to propose a waste heat recovery device for a natural gas forging heating furnace to solve the technical problem in the prior art that the exhaust gas from the heating furnace is heat exchanged through an intermediate medium, resulting in insufficient waste heat recovery.

[0005] Based on the above purpose, the utility model provides a waste heat recovery device for a natural gas forging heating furnace, comprising a heating furnace body and a heat exchange box, wherein the heating furnace body is connected to the heat exchange box through a connecting pipe, a sealing cover is installed on the top of the heat exchange box, a water outlet and an air outlet are arranged on the side of the heat exchange box, a filter plate is installed inside the heat exchange box, and the waste heat recovery device also includes:

[0006] A mounting seat, the mounting seat is arranged on the inner wall of the heat exchange box, and a plurality of slots are evenly distributed on the mounting seat;

[0007] Partitions, wherein there are a plurality of partitions, and each of the plurality of partitions is provided with a gas-passing opening;

[0008] A water supply assembly is installed on the side of the heat exchange box to supply water mist and jet into the heat exchange box.

[0009] Furthermore, the water supply assembly includes a liquid separation chamber, a water mist nozzle and a jet nozzle. The liquid separation chamber is installed on the outer wall of the heat exchange box through a fixed plate. The water mist nozzle and the jet nozzle are both installed on the liquid separation chamber, and the water mist nozzle and the jet nozzle are both placed in the heat exchange box. The water mist nozzle is placed above the partition, and the jet port of the jet nozzle faces the filter holes of the filter plate.

[0010] Furthermore, a three-way pipe is installed on the liquid separation chamber, and the main pipeline of the three-way pipe is connected to an external water pump.

[0011] Furthermore, a feed port and a discharge port are provided at the upper portion of the heating furnace body, and an air inlet and a natural gas inlet are provided at the lower portion of the heating furnace body.

[0012] Furthermore, the filter plate is provided with a raised structure on the side of the filter hole.

[0013] Furthermore, one ends of a plurality of the partitions are respectively installed in a plurality of the slots, and the other ends of a plurality of the partitions are all against the inner wall of the heat exchange box, and the air passage openings on two adjacent partitions are staggered.

[0014] The beneficial effects of the utility model are as follows: a waste heat recovery device for a natural gas forging heating furnace of the utility model is adopted. When in use, the natural gas introduced into the heating furnace body is mixed with air and fully burned, and the waste gas with waste heat generated will enter the heat exchange box through the connecting pipe, and continuously supply cold water to the liquid separation cavity through the three-way pipe. After the water path is diverted, water mist is sprayed into the heat exchange box through the water mist nozzle, so that a water mist area is created in the uppermost cavity area inside the heat exchange box. During the process of the waste heat waste gas passing through the water mist area, the waste heat waste gas is in direct contact with the water mist, and fully exchanges heat. Subsequently, the water mist falls into the lower part of the heat exchange box through the filter holes of the filter plate, and is discharged from the water outlet for recovery, thereby ensuring that the waste heat of the waste gas is fully recovered. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only for the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 It is a structural schematic diagram of the utility model;

[0017] Figure 2 It is a structural schematic diagram of the heat exchange box and corresponding parts of the structure in the utility model;

[0018] Figure 3This is a schematic diagram of the structure inside the heat exchange box in the utility model;

[0019] Figure 4 It is a schematic diagram of the assembly of the mounting seat and the partition in the utility model;

[0020] Figure 5 It is a structural schematic diagram of the water supply component in the utility model;

[0021] The markings in the figure are:

[0022] 1. Heating furnace body; 2. Heat exchange box; 3. Connecting pipe; 4. Sealing cover; 5. Water outlet; 6. Air outlet; 7. Filter plate; 8. Mounting seat; 9. Slot; 10. Partition; 11. Air opening; 12. Liquid separation chamber; 13. Water mist nozzle; 14. Jet nozzle; 15. Fixed plate; 16. Three-way pipe; 17. Feed inlet; 18. Discharge outlet; 19. Air inlet; 20. Natural gas inlet. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments.

[0024] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the present invention should be understood by people with ordinary skills in the field to which the present invention belongs. The words "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0025] The utility model proposes a waste heat recovery device for a natural gas forging heating furnace, such as Figures 1 to 5 As shown, it includes a heating furnace body 1 and a heat exchange box 2. The heating furnace body 1 is connected to the heat exchange box 2 through a connecting pipe 3. A sealing cover 4 is installed on the top of the heat exchange box 2. A water outlet 5 and an air outlet 6 are provided on the side of the heat exchange box 2. A filter plate 7 is installed inside the heat exchange box 2. The waste heat recovery device also includes:

[0026] A mounting seat 8, the mounting seat 8 is arranged on the inner wall of the heat exchange box 2, and a plurality of slots 9 are evenly distributed on the mounting seat 8;

[0027] There are a plurality of partitions 10, and each of the partitions 10 has a gas-passing opening 11;

[0028] A water supply assembly is installed on the side of the heat exchange box 2 to supply water mist and jet into the heat exchange box 2.

[0029] In this embodiment, the water supply component includes a liquid separation chamber 12, a water mist nozzle 13 and a jet nozzle 14. The liquid separation chamber 12 is installed on the outer wall of the heat exchange box 2 through a fixing plate 15. The water mist nozzle 13 and the jet nozzle 14 are both installed on the liquid separation chamber 12, and the water mist nozzle 13 and the jet nozzle 14 are both placed in the heat exchange box 2. The water mist nozzle 13 is placed above the partition 10. The jet port of the jet nozzle 14 faces the filter holes of the filter plate 7. The jet ejected by the jet nozzle 14 can directly act on the filter hole surface of the filter plate 7 to prevent blockage.

[0030] In this embodiment, when in use, the natural gas introduced into the heating furnace body 1 is mixed with air and fully burned, and the waste heat exhaust gas generated will enter the heat exchange box 2 through the connecting pipe 3, and cold water will be continuously supplied to the liquid separation chamber 12 through the three-way pipe 16. After the water channel is divided, water mist is sprayed into the heat exchange box 2 through the water mist nozzle 13, so that a water mist area is created in the uppermost cavity area inside the heat exchange box 2. When the waste heat exhaust gas passes through the water mist area, the waste heat exhaust gas is in direct contact with the water mist, and sufficient heat exchange is achieved;

[0031] In addition, the cold water provides a stable jet to the filter holes of the filter plate 7 through the jet nozzle 14 to avoid clogging of the filter holes on the filter plate 7. After heat exchange, the water mist falls into the lower part of the heat exchange box 2 through the filter holes of the filter plate 7 and is discharged from the water outlet 5 for recovery, while the exhaust gas after sufficient heat exchange is discharged from the air outlet 6.

[0032] In this embodiment, if Figure 1 , Figure 2 , Figure 3 , Figure 5 As shown, a three-way pipe 16 is also installed on the liquid separation chamber 12, and the main pipeline of the three-way pipe 16 is connected to an external water pump. The externally connected water pump controls the water pressure rushing into the heat exchange box 2 to ensure sufficient heat exchange with the exhaust gas.

[0033] In this embodiment, if Figure 1 As shown, a feed port 17 and a discharge port 18 are provided at the upper portion of the heating furnace body 1, and an air inlet 19 and a natural gas inlet 20 are provided at the lower portion of the heating furnace body 1, so as to ensure that the natural gas is fully burned in the heating furnace body 1 and avoid waste of resources.

[0034] In addition, preferably, Figure 3 As shown, a convex structure is provided on the filter plate 7 at the side of the filter hole to prevent the jet of the jet nozzle 14 from failing to cover the filter hole of the filter plate 7, so as to achieve the effect of unimpeded passage of exhaust gas and water.

[0035] In this embodiment, if Figure 3 , Figure 4 As shown, one ends of several partitions 10 are respectively installed in several slots 9, and the other ends of several partitions 10 are against the inner wall of the heat exchange box 2. The air openings 11 on two adjacent partitions 10 are staggered, so that water mist can also pass through each air opening 11, and the exhaust gas can flow in an S-shaped path, increasing its flow path and the contact time with the water mist during the flow process, thereby further achieving the purpose of sufficient heat exchange.

[0036] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples. Under the concept of the present invention, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity.

[0037] The utility model is intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the utility model should be included in the scope of protection of the utility model.

Claims

1. A waste heat recovery device for a natural gas forging heating furnace, comprising a heating furnace body (1) and a heat exchange box (2), wherein the heating furnace body (1) is connected to the heat exchange box (2) through a connecting pipe (3), characterized in that: A sealing cover (4) is installed on the upper top of the heat exchange box (2), a water outlet (5) and an air outlet (6) are provided on the side of the heat exchange box (2), a filter plate (7) is installed inside the heat exchange box (2), and the waste heat recovery device further comprises: A mounting seat (8), the mounting seat (8) being arranged on the inner wall of the heat exchange box (2), and the mounting seat (8) being evenly distributed with a plurality of slots (9); A partition (10), wherein there are a plurality of partitions (10), and each of the plurality of partitions (10) is provided with a gas-passing opening (11); A water supply component is installed on the side of the heat exchange box (2) to supply water mist and jet into the heat exchange box (2).

2. The waste heat recovery device for a natural gas forging heating furnace according to claim 1 is characterized in that: The water supply assembly comprises a liquid separation chamber (12), a water mist nozzle (13) and a jet nozzle (14); the liquid separation chamber (12) is mounted on the outer wall of the heat exchange box (2) via a fixing plate (15); the water mist nozzle (13) and the jet nozzle (14) are both mounted on the liquid separation chamber (12); and the water mist nozzle (13) and the jet nozzle (14) are both placed in the heat exchange box (2); the water mist nozzle (13) is placed above the partition (10); and the jet port of the jet nozzle (14) faces the filter hole of the filter plate (7).

3. The waste heat recovery device for a natural gas forging heating furnace according to claim 2 is characterized in that: A three-way pipe (16) is also installed on the liquid separation chamber (12), and the main pipe of the three-way pipe (16) is connected to an external water pump.

4. The waste heat recovery device for a natural gas forging heating furnace according to claim 1 is characterized in that: The upper part of the heating furnace body (1) is provided with a material inlet (17) and a material outlet (18), and the lower part of the heating furnace body (1) is provided with an air inlet (19) and a natural gas inlet (20).

5. The waste heat recovery device for a natural gas forging heating furnace according to claim 1 is characterized in that: The filter plate (7) is provided with a raised structure on the side of the filter hole.

6. The waste heat recovery device for a natural gas forging heating furnace according to claim 1 is characterized in that: One ends of a plurality of the partitions (10) are respectively installed in a plurality of the slots (9), and the other ends of a plurality of the partitions (10) are all against the inner wall of the heat exchange box (2), and the air passage openings (11) on two adjacent partitions (10) are arranged in a staggered manner.

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