Device and method for reducing exhaust gas temperature of heating furnace

Abstract

The invention provides a device and method for reducing the exhaust gas temperature of a heating furnace, and relates to the technical field of heating furnace exhaust, the device comprises a combustion furnace body, an exhaust channel is installed at the output end of the combustion furnace body, a plurality of blocking pieces are installed in the exhaust channel, and a sealing cover is installed on the side, away from the combustion furnace body, of the exhaust channel; an exhaust pipe is installed on the upper surface of the sealing cover, a water inlet pipe is installed on the sealing cover, a drainage pipe is installed on the side, close to the combustion furnace body, of the exhaust channel, and the two ends of the blocking piece communicate with the drainage pipe and the water inlet pipe correspondingly. The blocking structure formed by alternately arranging the multiple annular cylinders and the multiple cylinders is installed in the exhaust channel, the speed that air is exhausted through the exhaust pass band is reduced through the blocking structure, then the heat exchange effect of water flow in the exhaust channel is improved, and the temperature of water flow in the annular cylinders and the cylinders is increased; meanwhile, the smoke exhaust temperature in the heating furnace is reduced.

Description

Technical Field

[0001] This application relates to the field of flue gas technology for heating furnaces, and in particular to an apparatus and method for reducing the flue gas temperature of heating furnaces. Background Technology

[0002] The exhaust system of a heating furnace is a core component of high-temperature industrial furnaces. Its core function is to efficiently exhaust the waste gas generated during combustion, while also taking into account energy recovery and environmental compliance. The system is usually composed of key equipment such as flues, induced draft fans, and heat exchangers. It ensures the directional flow of flue gas through negative pressure control to prevent backflow and is widely used in environments such as steel plants.

[0003] Steel plants mainly use pipeline heat exchange to exchange heat with the hot air discharged from the combustion furnace, thereby reducing the temperature of flue gas emissions. However, the hot air discharged from the combustion furnace is affected by the amount of material in the furnace, and the water flow rate is constant in pipeline heat exchange, which cannot meet the needs of different exhaust volumes. Summary of the Invention

[0004] This application is made in view of the above-mentioned problems, and its purpose is to provide an apparatus and method for reducing the exhaust gas temperature of a heating furnace, so as to solve the problems mentioned in the background art. To achieve the above objectives, the present invention provides the following technical solution: a device for reducing the exhaust gas temperature of a heating furnace, comprising a combustion furnace body, an exhaust channel installed at the output end of the combustion furnace body, a plurality of blocking components installed in the exhaust channel, a sealing cover installed on the side of the exhaust channel away from the combustion furnace body, an exhaust pipe installed on the upper surface of the sealing cover, a water inlet pipe installed on the sealing cover, a drain pipe installed on the side of the exhaust channel close to the combustion furnace body, and the two ends of the blocking components being connected to the drain pipe and the water inlet pipe, respectively.

[0005] Furthermore, the blocking component includes multiple annular cylinders, which are sequentially installed in the exhaust channel. A first connecting pipe is installed at the edge of the upper surface of each annular cylinder, and a second exhaust pipe is installed at the edge of the lower surface of each annular cylinder. Extrusion components are provided on both the upper and lower sides of each annular cylinder. The ends of the first and second connecting pipes away from the annular cylinder are connected to the extrusion components. The water inlet pipe is connected to the uppermost extrusion component, and the drain pipe is connected to the lowermost extrusion component.

[0006] Furthermore, the extrusion component includes a cylinder, with cylinders provided on both the upper and lower sides of the annular cylinder. The water inlet pipe communicates with the uppermost cylinder, and the drain pipe communicates with the lowermost cylinder. The end of the first connecting pipe away from the annular cylinder is installed at the lower surface edge of the cylinder, and the end of the second connecting pipe away from the annular cylinder is installed at the upper surface edge of the cylinder. Circular grooves are provided on both the upper and lower sides of the cylinder, and movable components are slidably connected in the circular grooves. A blocking component is installed inside the cylinder, and the blocking component is disposed between the two movable components.

[0007] Furthermore, the movable component includes a movable cylinder, which is slidably connected in a circular groove. The movable cylinder has multiple vertical grooves on its annular surface inside the cylinder. The vertical grooves of the upper movable cylinder are located near the second connecting pipe, and the vertical grooves of the lower movable cylinder are located near the first connecting pipe. One end of the movable cylinder inside the cylinder is in sliding contact with the interceptor. A blocking block is installed inside the movable cylinder, and a through hole is provided on the side of the movable cylinder facing the interceptor, penetrating the blocking block.

[0008] Furthermore, the interceptor includes an interceptor plate, which is installed inside the cylinder and divides the cylinder into upper and lower spaces. Interceptor cylinders are installed on both the upper and lower sides of the interceptor plate. Water inlet holes are opened on the annular surface of the interceptor cylinders. The movable cylinder is slidably connected inside the interceptor cylinders. A through hole is opened at the center of the interceptor plate, and the through hole connects the upper and lower spaces of the cylinder.

[0009] Furthermore, two heat insulation rings are installed on the annular surface of the movable cylinder. The end of the heat insulation ring away from the movable cylinder slides in contact with the intercepting cylinder. A sealing ring is installed inside the two heat insulation rings, and the sealing ring slides in contact with the intercepting cylinder.

[0010] Furthermore, a vertical cylinder is installed on the outside of the exhaust channel, and a water supply pipe communicating with the water supply equipment is installed on the annular surface of the vertical cylinder, with the end of the water supply pipe away from the cylinder communicating with the vertical cylinder.

[0011] Furthermore, multiple supports are mounted on the annular surface of the cylinder, with the end of each support away from the cylinder installed in the exhaust channel.

[0012] Furthermore, an air inlet pipe is installed on the side of the combustion furnace body, and a blower is installed at the end of the air inlet pipe away from the combustion furnace body.

[0013] A method for reducing the exhaust gas temperature of a heating furnace, comprising the following specific steps: Step 1: Water flows into the vertical cylinder through the water supply pipe and is initially heated. Then, it enters the uppermost cylinder through the water inlet pipe. The water in the cylinder enters the lower annular cylinder through the first connecting pipe. The water in the annular cylinder then enters the lower cylinder through the second connecting pipe. This process is repeated, exchanging heat with the hot air in the exhaust channel through multiple cylinders and annular cylinders, and finally being discharged from the lower drain pipe. Step 2: Hot air enters the exhaust channel from the combustion furnace body. The hot air entering the exhaust channel is blocked by multiple cylinders and annular cylinders in sequence, which slows down the flow rate, increases the contact time with the water flow in the annular cylinder and cylinder, increases the heat exchange efficiency with the water flow, and reduces the flue gas discharge temperature.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. This application utilizes a blocking structure composed of multiple annular cylinders and multiple cylindrical cylinders arranged alternately in the exhaust channel to slow down the air discharge speed through the exhaust channel, thereby improving the heat exchange effect of water flow in the exhaust channel, increasing the water flow temperature in the annular cylinders and cylindrical cylinders, and simultaneously reducing the flue gas discharge temperature in the heating furnace.

[0015] 2. This application opens circular grooves on both the upper and lower sides of the cylinder and slides a movable cylinder in the grooves. When the air flow in the exhaust channel increases, the movable cylinder is pushed by the air to move into the cylinder. At this time, when the water flowing into the cylinder passes through the movable cylinder, the resistance of the movable cylinder to the water flow is reduced, thereby increasing the water flow speed and allowing more water to exchange heat with the hot air in the exhaust channel, further reducing the exhaust temperature of the flue gas in the heating furnace. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this drawing or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this drawing. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of device A of the present invention; Figure 2 This is a schematic diagram of device A of the present invention; Figure 3 This is a schematic diagram of device A of the present invention; Figure 4 This is a schematic diagram of device A of the present invention; Figure 5 This is a schematic diagram of device A of the present invention; Figure 6 This is a schematic diagram of device A of the present invention.

[0018] Explanation of reference numerals in the attached diagram: 1. Combustion furnace body; 2. Air inlet pipe; 3. Blower; 4. Drain pipe; 5. Vertical cylinder; 6. Exhaust pipe; 7. Water inlet pipe; 8. Water supply pipe; 9. Exhaust passage; 10. Sealing cover; 11. Cylindrical cylinder; 12. First connecting pipe; 13. Second connecting pipe; 14. Movable cylinder; 15. Annular cylinder; 16. Support; 17. Heat insulation ring; 18. Interception cylinder; 19. Interception plate; 20. Water inlet hole; 21. Sealing ring; 22. Blocking block; 23. Connecting hole; 24. Vertical groove.

[0019] The purpose, features, and advantages of this accompanying drawing will be further explained in conjunction with the embodiments and with reference to the accompanying drawing. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this application clearer, the following description and illustration are provided in conjunction with embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application. All other embodiments obtained by those skilled in the art based on the embodiments provided in this application without inventive effort are within the scope of protection of this application.

[0021] Obviously, the following description is merely some examples or embodiments of this application. Those skilled in the art can apply this application to other similar scenarios without any inventive effort. Furthermore, it is understood that although the effort involved in such development may be complex and lengthy, for those skilled in the art related to the content disclosed in this application, any changes to design, manufacturing, or production based on the technical content disclosed in this application are merely conventional technical means and should not be construed as insufficient disclosure of the content of this application.

[0022] Unless otherwise specified, the terms "comprising" and "including" as used in this application can be open-ended or closed-ended. For example, "comprising" and "including" can mean that other components not listed may also be included, or that only the listed components may be included.

[0023] Unless otherwise specified, the term "or" is inclusive in this application. For example, the phrase "A or B" means "A, B, or both A and B". More specifically, the condition "A or B" is satisfied by any of the following conditions: A is true (or exists) and B is false (or does not exist); A is false (or does not exist) and B is true (or exists); or both A and B are true (or exist).

[0024] Terminology explanation: such as Figures 1 to 6As shown, an apparatus and method for reducing the exhaust gas temperature of a heating furnace includes a combustion furnace body 1. An exhaust channel 9 is installed at the output end of the combustion furnace body 1. A sealing cover 10 is installed on the side of the exhaust channel 9 away from the combustion furnace body 1. A water inlet pipe 7 is installed on the sealing cover 10. Multiple annular cylinders 15 are installed inside the exhaust channel 9. Cylinders 11 are provided on both the upper and lower sides of the annular cylinder 15. The uppermost cylinder 11 inside the exhaust channel 9 is connected to the water inlet pipe 7. The lowermost cylinder 11 inside the exhaust channel 9 is connected to the drain pipe 4. The drain pipe 4 extends through the exhaust channel 9 and out of the exhaust channel 9. A first connecting pipe 12 is installed at the edge of the upper surface of the annular cylinder 15. A second connecting pipe 13 is installed at the edge of the lower surface of the annular cylinder 15. The end of the first connecting pipe 12 away from the annular cylinder 15 is installed at the edge of the lower surface of the cylinder 11. The end of the second connecting pipe 13 away from the annular cylinder 15 is installed at the edge of the upper surface of the cylinder 11.

[0025] By installing a blocking structure consisting of multiple annular cylinders 15 and multiple cylindrical cylinders 11 arranged alternately in the exhaust channel 9, the blocking structure slows down the air discharge speed through the exhaust channel, thereby improving the heat exchange effect of water flow in the exhaust channel 9, increasing the water flow temperature in the annular cylinders 15 and cylindrical cylinders 11, and at the same time reducing the flue gas discharge temperature in the heating furnace.

[0026] Both the upper and lower sides of the cylinder 11 have circular grooves, and a movable cylinder 14 is slidably connected in the grooves. The movable cylinder 14 has multiple vertical grooves 24 on its annular surface inside the cylinder 11. The vertical grooves 24 of the upper movable cylinder 14 are located near the second connecting pipe 13, and the vertical grooves 24 of the lower movable cylinder 14 are located near the first connecting pipe 12. A blocking block 22 is installed inside the movable cylinder 14. A connecting hole 23 is opened on the side of the movable cylinder 14 facing the inside of the cylinder 11, which penetrates the blocking block 22. An intercepting plate 19 is installed inside the cylinder 11, which divides the cylinder 11 into upper and lower spaces. Intercepting cylinders 18 are installed on both the upper and lower sides of the intercepting plate 19. The movable cylinder 14 is slidably connected in the intercepting cylinder 18. A water inlet hole 20 is opened on the annular surface of the intercepting cylinder 18. A through hole is opened at the center of the intercepting plate 19, which connects the upper and lower spaces of the cylinder 11.

[0027] By opening circular grooves on both the upper and lower sides of the cylinder 11 and slidingly connecting the movable cylinder 14 in the grooves, when the air flow in the exhaust channel 9 increases, the movable cylinder 14 is pushed by the air to move into the cylinder 11. At this time, when the water flow entering the cylinder 11 passes through the movable cylinder 14, the resistance of the movable cylinder 14 to the water flow is reduced, thereby increasing the water flow speed and allowing more water to exchange heat with the hot air in the exhaust channel 9, further reducing the exhaust temperature of the flue gas in the heating furnace.

[0028] To ensure the airtightness of the movable cylinder 14 within the cylinder 11, two heat insulation rings 17 are installed on the annular surface of the movable cylinder 14. The end of the heat insulation ring 17 away from the movable cylinder 14 slides in contact with the intercepting cylinder 18. A sealing ring 21 is installed inside the two heat insulation rings 17, and the sealing ring 21 slides in contact with the intercepting cylinder 18. The sealing ring 21 seals the space between the movable cylinder 14 and the intercepting cylinder 18. Multiple brackets 16 are then installed on the annular surface of the cylinder 11. The end of the bracket 16 away from the cylinder 11 is installed in the exhaust channel 9, and the bracket 16 fixes the position of the cylinder 11.

[0029] To further enhance the heat exchange effect between the water flow and the hot air in the exhaust channel 9, a vertical cylinder 5 is installed on the outside of the exhaust channel 9. A water supply pipe 8 connected to the water supply equipment is installed on the annular surface of the vertical cylinder 5. The end of the water supply pipe 8 away from the cylinder 11 is connected to the vertical cylinder 5. An air inlet pipe 2 is installed on the side of the combustion furnace body 1. A blower 3 is installed on the end of the air inlet pipe 2 away from the combustion furnace body 1. An exhaust pipe 6 is installed on the upper surface of the sealing cover 10.

[0030] Working principle: Water is first fed into the vertical cylinder 5 through the water supply pipe 8. The water is initially heated in the vertical cylinder 5. After the initial heating, the water in the vertical cylinder 5 is discharged into the cylindrical cylinder 11 through the water inlet pipe 7. The water in the cylindrical cylinder 11 is then discharged into the annular cylinder 15 through the first drain pipe 4. The water in the annular cylinder 15 is then discharged into the lower cylindrical cylinder 11 through the second connecting pipe 13, and finally discharged through the drain pipe 4.

[0031] The hot air from combustion inside the furnace body 1 is discharged into the exhaust channel 9, and then contacts the cylinder 11 and the annular cylinder 15 in sequence, heating the water flow inside the cylinder 11 and the annular cylinder 15. The hot air is finally discharged from the exhaust pipe 6 after passing through multiple annular cylinders 15 and cylinders 11. If less hot air is discharged from the furnace body 1, the squeezing force exerted by the air on the movable cylinder 14 when passing through the cylinder 11 is small. At this time, the movable cylinder 14 is squeezed by the water flow and moves out of the cylinder 11, thereby increasing the resistance during the air flow process, thus slowing down the air flow speed, and increasing the contact time between the heat in the air and the water flow, thereby reducing the temperature of the discharged air. When the air flow speed is fast, the movable cylinder 14 is squeezed by the air and moves into the cylinder 11. At this time, the water flow inside the cylinder 11 is less blocked by the movable cylinder 14, the water flow speed is increased, and more water flow comes into contact with the air and exchanges heat, thereby achieving the effect of reducing the air temperature.

[0032] It should be noted that this application is not limited to the above-described embodiments. The above embodiments are merely examples, and any embodiments with the same structure and effect as the technical concept within the scope of this application are included in the technical scope of this application. Furthermore, various modifications that can be conceived by those skilled in the art to the embodiments, and other ways of constructing by combining some of the constituent elements of the embodiments, without departing from the spirit of this application, are also included in the scope of this application.

Claims

1. A device for reducing the exhaust gas temperature of a heating furnace, comprising a combustion furnace body (1), characterized in that, The output end of the combustion furnace body (1) is equipped with an exhaust channel (9), and multiple blocking components are installed in the exhaust channel (9). A sealing cover (10) is installed on the side of the exhaust channel (9) away from the combustion furnace body (1). An exhaust pipe (6) is installed on the upper surface of the sealing cover (10). A water inlet pipe (7) is installed on the sealing cover (10). A drain pipe (4) is installed on the side of the exhaust channel (9) close to the combustion furnace body (1). The two ends of the blocking component are connected to the drain pipe (4) and the water inlet pipe (7) respectively.

2. The device for reducing the exhaust gas temperature of a heating furnace according to claim 1, characterized in that, The blocking component includes multiple annular cylinders (15), which are sequentially installed in the exhaust channel (9). A first connecting pipe (12) is installed at the edge of the upper surface of the annular cylinder (15), and a second connecting pipe (13) is installed at the edge of the lower surface of the annular cylinder (15). Extrusion components are provided on both the upper and lower sides of the annular cylinder (15). The ends of the first connecting pipe (12) and the second connecting pipe (13) away from the annular cylinder (15) are connected to the extrusion components. The water inlet pipe (7) is connected to the uppermost extrusion component, and the drain pipe (4) is connected to the lowermost extrusion component.

3. The device for reducing the exhaust gas temperature of a heating furnace according to claim 2, characterized in that, The extrusion component includes a cylinder (11). The annular cylinder (15) is provided with cylinders (11) on both the upper and lower sides. The water inlet pipe (7) is connected to the uppermost cylinder (11). The drain pipe (4) is connected to the lowermost cylinder (11). The end of the first connecting pipe (12) away from the annular cylinder (15) is installed at the lower edge of the cylinder (11). The end of the second connecting pipe (13) away from the annular cylinder (15) is installed at the upper edge of the cylinder (11). The cylinder (11) is provided with a circular groove on both the upper and lower sides. A movable component is slidably connected in the circular groove. A blocking component is installed in the cylinder (11). The blocking component is located between two movable components.

4. The device for reducing the exhaust gas temperature of a heating furnace according to claim 3, characterized in that, The movable component includes a movable cylinder (14), which is slidably connected in a circular groove. The movable cylinder (14) has multiple vertical grooves (24) on its annular surface inside the cylinder (11). The vertical grooves (24) of the upper movable cylinder (14) are located near the second connecting pipe (13), and the vertical grooves (24) of the lower movable cylinder (14) are located near the first connecting pipe (12). One end of the movable cylinder (14) inside the cylinder (11) is in sliding contact with the interceptor. A blocking block (22) is installed inside the movable cylinder (14). A connecting hole (23) penetrating the blocking block (22) is provided on the side of the movable cylinder (14) facing the interceptor.

5. The device for reducing the exhaust gas temperature of a heating furnace according to claim 4, characterized in that, The interceptor includes an interceptor plate (19), which is installed inside a cylinder (11) and divides the cylinder (11) into upper and lower spaces. An interceptor tube (18) is installed on both the upper and lower sides of the interceptor plate (19). A water inlet hole (20) is provided on the annular surface of the interceptor tube (18). The movable tube (14) is slidably connected inside the interceptor tube (18). A through hole is provided at the center of the interceptor plate (19), which connects the upper and lower spaces of the cylinder (11).

6. The device for reducing the exhaust gas temperature of a heating furnace according to claim 5, characterized in that, Two heat insulation rings (17) are installed on the annular surface of the movable cylinder (14). The heat insulation rings (17) are located away from the end of the movable cylinder (14) and slide in contact with the intercepting cylinder (18). A sealing ring (21) is installed inside the two heat insulation rings (17), and the sealing ring (21) slides in contact with the intercepting cylinder (18).

7. The device for reducing the exhaust gas temperature of a heating furnace according to claim 6, characterized in that, A vertical cylinder (5) is installed on the outside of the exhaust channel (9). A water supply pipe (8) connected to the water supply equipment is installed on the annular surface of the vertical cylinder (5). The end of the water supply pipe (8) away from the cylinder (11) is connected to the vertical cylinder (5).

8. The device for reducing the exhaust gas temperature of a heating furnace according to claim 7, characterized in that, The annular surface of the cylinder (11) is equipped with a plurality of brackets (16), and the end of the bracket (16) away from the cylinder (11) is installed in the exhaust channel (9).

9. The device for reducing the exhaust gas temperature of a heating furnace according to claim 8, characterized in that, An air inlet pipe (2) is installed on the side of the combustion furnace body (1), and a blower (3) is installed at the end of the air inlet pipe (2) away from the combustion furnace body (1).

10. A method for reducing the exhaust gas temperature of a heating furnace, applied to the apparatus for reducing the exhaust gas temperature of a heating furnace as described in claim 9, characterized in that, The specific steps are as follows: Step 1: Water flows into the vertical cylinder (5) through the water supply pipe (8) and is initially heated. Then, it enters the uppermost cylinder (11) through the water inlet pipe (7). The water in the cylinder (11) enters the lower annular cylinder (15) through the first connecting pipe (12). The water in the annular cylinder (15) then enters the lower cylinder (11) through the second connecting pipe (13). This process is repeated, and the water exchanges heat with the hot air in the exhaust channel (9) through multiple cylinders (11) and annular cylinder (15). Finally, the water is discharged from the lowermost drain pipe (4). Step 2: Hot air enters the exhaust channel (9) from the combustion furnace body (1). The hot air entering the exhaust channel (9) is blocked by multiple cylinders (11) and annular cylinders (15) in sequence, which slows down the flow rate, increases the contact time with the water flow in the annular cylinder (15) and cylinders (11), increases the heat exchange efficiency with the water flow, and reduces the flue gas discharge temperature.

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