Flue gas waste heat recycling device for waste incineration treatment

Abstract

The utility model discloses a waste incineration treatment flue gas waste heat recycling device, relates to the field of waste incineration treatment, and aims to solve the problems that in the prior art, flue gas generated by incineration contains a large amount of heat, the existing flue gas treatment mode is that the flue gas is discharged after being treated, and waste heat in the flue gas is not effectively utilized. One side of the incineration device is connected with a smoke filtering box, one side of the smoke filtering box is connected with a waste heat recycling box, the upper end of one side in the waste heat recycling box is fixedly connected with a first gas distributing box, and the lower end of the middle of the rear end face in the waste heat recycling box is fixedly connected with a first gas collecting box; a first gas distribution box is fixedly arranged on the upper end face of the interior of the waste heat recovery box, the first gas distribution box communicates with the first gas collection box through a plurality of first heat exchange pipes, a second gas distribution box is fixedly arranged at the upper end of the interior of the waste heat recovery box, a second gas collection box is fixedly arranged on the lower end face of the interior of the waste heat recovery box, and the second gas distribution box communicates with the second gas collection box through a plurality of second heat exchange pipes.

Description

Technical Field

[0001] This utility model relates to the field of waste incineration treatment, specifically a device for reusing waste heat from waste incineration flue gas. Background Technology

[0002] Waste incineration is a high-temperature oxidation method for treating municipal solid waste. This process involves burning the waste in an incinerator at high temperatures (typically 850-1100℃), converting combustible waste into carbon dioxide and water. The ash and slag produced after incineration are less than 20% of the original volume of the waste, significantly reducing the amount of solid waste and eliminating pathogens. The heat generated during incineration can be recovered for power generation or heating, while the flue gas undergoes purification treatment to ensure compliance with emission standards. The slag and other waste residues can also be comprehensively utilized, such as for road paving or the manufacture of building materials.

[0003] For example, authorization announcement number CN218924158U discloses a dust collection device for flue gas filtration in waste incineration, including a filter tube body. A smoke inlet hole is opened at the lower end of one side of the filter tube body. An adjustment component is fixedly installed inside the dust collection box. A second cleaning component is fixedly installed at both ends of the upper surface of the adjustment component. A first cleaning component is fixedly installed between the two sets of second cleaning components on both sides. This utility model has a design that fixes a connecting rod to the side wall of a fixed plate. The drive motor can drive the connecting rod to rotate through the fixed plate. The connecting rod will drive the third cleaning plate to rotate. Because the third cleaning plate is in contact with the dust filter body, the rotation of the third cleaning plate will collect the dust attached to the dust filter body through the feeding trough. Then the dust will fall onto the collection trough, thereby achieving the advantage of preventing excessive dust accumulation, which would lead to poor filtration effect of the dust filter body.

[0004] Since the flue gas produced by incineration contains a large amount of heat, the existing methods of treating the flue gas are all to treat it and then release it, without effectively utilizing the residual heat in the flue gas; therefore, there is an urgent need in the market to develop a device for reusing the residual heat of waste incineration flue gas to help people solve the existing problems. Utility Model Content

[0005] The purpose of this utility model is to provide a waste incineration flue gas waste heat recovery device to solve the problem mentioned in the background art that the flue gas produced by incineration contains a large amount of heat, and the existing flue gas treatment methods all involve treating the flue gas and then discharging it, resulting in the ineffective utilization of the waste heat in the flue gas.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a waste incineration flue gas waste heat recovery device, including an incineration device, a flue gas filter box connected to one side of the incineration device, a waste heat recovery box connected to one side of the flue gas filter box, a first gas distribution box fixedly connected to the upper end of one side of the waste heat recovery box, a first gas collection box fixedly connected to the lower middle part of the rear end face of the waste heat recovery box, the first gas distribution box and the first gas collection box being connected through multiple first heat exchange pipes, a second gas distribution box fixedly installed at the upper end of the waste heat recovery box, a second gas collection box fixedly installed at the lower end face of the waste heat recovery box, and the second gas distribution box and the second gas collection box being connected through multiple second heat exchange pipes.

[0007] Preferably, one side of the upper surface of the flue gas filter box is connected to the flue gas outlet pipe of the incineration device through a flue gas inlet pipe, and the other side of the upper surface of the flue gas filter box is connected to the first gas distribution box inside the waste heat recovery box through a flue gas supply pipe.

[0008] Preferably, a filter screen is provided between the lower end of the flue pipe and the inside of the flue gas filter box. A limiting tube is fixedly connected to one side of the lower end face of the inside of the flue gas filter box. A rotating shaft is rotatably connected inside the limiting tube. The upper end of the rotating shaft extends to the lower end of the filter screen and is fixedly connected to multiple scraper rods.

[0009] Preferably, a drive device is fixedly connected to one side of the lower end face of the flue gas filter box, a motor is fixedly installed inside the drive device, and the lower end of the rotating shaft extends into the drive device and is fixedly connected to the output shaft of the motor.

[0010] Preferably, a flue pipe is fixedly connected to the lower end of the rear end face of the waste heat recovery box, and the flue pipe is connected to the interior of the first gas collection box.

[0011] Preferably, an air inlet pipe is fixedly connected to the upper end face of the waste heat recovery box, the lower end of the air inlet pipe is connected to the interior of the second gas distribution box, a conveying pipe is fixedly connected to the lower end face of the waste heat recovery box, the upper end of the conveying pipe is connected to the interior of the second gas collection box, and one side of the conveying pipe is connected to the air inlet of the incineration device.

[0012] Preferably, a water inlet pipe is fixedly installed at the upper end of the front face of the waste heat recovery box, and a drain pipe is fixedly installed at the lower end of the front face of the waste heat recovery box.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] (1) In this utility model, the flue gas filter box and the waste heat recovery box are designed to achieve the dual functions of efficient filtration and waste heat recovery of the flue gas generated by waste incineration. The flue gas first passes through the filter screen in the flue gas filter box, which effectively removes large particles of dust and impurities, ensuring the smooth progress of the subsequent waste heat recovery process. At the same time, the heat exchange tube design in the waste heat recovery box allows the waste heat in the flue gas to be fully utilized, improving energy utilization efficiency and reducing energy waste.

[0015] (2) In this utility model, the design of the scraper and drive device inside the flue gas filter box effectively solves the problem of filter screen clogging. By driving the rotating shaft and scraper to rotate by the motor, the dust on the filter screen is continuously scraped off, ensuring the continuous unobstructed flow of the filter screen and improving the filtration efficiency and service life.

[0016] (3) In this utility model, the design of the waste heat recovery box not only realizes the recovery of waste heat from flue gas, but also improves the combustion efficiency of the incineration device by preheating the air. The preheated air enters the incineration device, providing more oxygen for waste incineration, promoting the combustion reaction and reducing the risk of incomplete combustion. At the same time, the preheated air also reduces the incineration device's dependence on external cold air, reducing energy consumption and emissions. Attached Figure Description

[0017] Figure 1 This is a front view of a waste incineration flue gas waste heat recovery device according to the present invention;

[0018] Figure 2 This is a front sectional view of the present invention;

[0019] Figure 3 This is a side sectional view of the waste heat recovery box of this utility model;

[0020] Figure 4 This is a detailed enlarged view of part A of this utility model.

[0021] In the diagram: 1. Incineration device; 2. Flue gas filter box; 201. Inlet pipe; 202. Smoke delivery pipe; 203. Filter screen; 204. Limiting pipe; 205. Rotating shaft; 206. Scraper; 3. Drive device; 301. Motor; 4. Waste heat recovery box; 401. First gas distribution box; 402. First gas collection box; 403. First heat exchange tube; 404. Exhaust pipe; 5. Second gas distribution box; 501. Air inlet pipe; 502. Second gas collection box; 503. Second heat exchange tube; 504. Delivery pipe. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0023] Please see Figure 1-4 This utility model provides an embodiment of a waste incineration flue gas waste heat recovery device, including an incineration device 1, a flue gas filter box 2 connected to one side of the incineration device 1, a waste heat recovery box 4 connected to one side of the flue gas filter box 2, a first gas distribution box 401 fixedly connected to the upper end of one side of the waste heat recovery box 4, and a first gas collection box 402 fixedly connected to the lower middle part of the rear end face of the waste heat recovery box 4. The first gas distribution box 401 and the first gas collection box 402 are connected by a plurality of first heat exchange pipes 403. One side of the upper end face of the flue gas filter box 2 is connected to the flue gas outlet pipe of the incineration device 1 through a flue gas inlet pipe 201, and the other side of the upper end face of the flue gas filter box 2 is connected to the first gas distribution box 401 inside the waste heat recovery box 4. The waste heat recovery box 4 is filled with water and connected to the incinerator 1 via a flue gas supply pipe 202. The flue gas generated by the incinerator 1 enters the first gas distribution box 401 inside the waste heat recovery box 4 after passing through the flue gas filter box 2. The first gas distribution box 401 disperses the flue gas into multiple first heat exchange tubes 403, which then flow into the first gas collection box 402 and re-converge. The waste heat of the flue gas heats the first heat exchange tubes 403, thereby heating the water and recovering the waste heat of the flue gas. A flue gas exhaust pipe 404 is fixedly connected to the lower end of the rear face of the waste heat recovery box 4. The flue gas exhaust pipe 404 is connected to the inside of the first gas collection box 402, and the flue gas collected in the first gas collection box 402 is discharged from the flue gas exhaust pipe 404.

[0024] Please see Figure 2-3A second gas distribution box 5 is fixedly installed at the upper end of the waste heat recovery box 4, and a second gas collection box 502 is fixedly installed at the lower end of the waste heat recovery box 4. The second gas distribution box 5 and the second gas collection box 502 are connected by multiple second heat exchange tubes 503. An air inlet pipe 501 is fixedly connected to the upper end of the waste heat recovery box 4, and the lower end of the air inlet pipe 501 is connected to the interior of the second gas distribution box 5. A conveying pipe 504 is fixedly connected to the lower end of the waste heat recovery box 4, and the upper end of the conveying pipe 504 is connected to the interior of the second gas collection box 502. One side of the conveying pipe 504 is connected to the air inlet of the incineration device 1. External air enters the interior of the second gas distribution box 5 through the air inlet pipe 501, and is dispersed into multiple second heat exchange tubes 503 through the second gas distribution box 5. After flowing through pipe 503, the air enters the second gas collecting box 502 and gathers. When the air passes through the second heat exchange tube 503, the water that absorbs the waste heat of the flue gas heats the second heat exchange tube 503, thus heating the air. The heated air then enters the incineration device 1 through the conveying pipe 504 after being gathered inside the second gas collecting box 502. This heats the air required for combustion inside the incineration device 1, improving the combustion efficiency inside the incineration device 1. A water inlet pipe is fixedly installed at the upper end of the front face of the waste heat recovery box 4, through which water is injected into the waste heat recovery box 4. A drain pipe is fixedly installed at the lower end of the front face of the waste heat recovery box 4. When the water is heated to a higher temperature, it is discharged through the drain pipe and can be used by other processes that require hot water.

[0025] Please see Figure 2 and Figure 4 A filter screen 203 is installed between the lower end of the flue gas supply pipe 202 and the inside of the flue gas filter box 2. A limit tube 204 is fixedly connected to one side of the lower end face of the inside of the flue gas filter box 2. A rotating shaft 205 is rotatably connected inside the limit tube 204. The upper end of the rotating shaft 205 extends to the lower end of the filter screen 203 and is fixedly connected to multiple scrapers 206. A drive device 3 is fixedly connected to one side of the lower end face of the flue gas filter box 2. A motor 301 is fixedly installed inside the drive device 3. The lower end of the rotating shaft 205 extends to the inside of the drive device 3 and is fixedly connected to the output shaft of the motor 301. The flue gas enters the inside of the flue gas filter box 2, is filtered by the filter screen 203, and then enters the flue gas supply pipe 202, so that the dust in the flue gas is filtered in advance. The rotating shaft 205 is driven by the motor 301 to rotate, which drives the multiple scrapers 206 to rotate and continuously scrape the lower end face of the filter screen 203 to prevent dust from clogging the filter screen 203.

[0026] Working Principle: When the waste incineration unit 1 starts operating, the generated flue gas first enters the flue gas filter box 2 through the inlet pipe 201. In the filter box 2, the flue gas is filtered by the filter screen 203 to remove large particles of dust and impurities, and then enters the first distribution box 401 of the waste heat recovery box 4 through the delivery pipe 202. In the first distribution box 401, the flue gas is evenly distributed into multiple first heat exchange tubes 403, which are surrounded by water within the waste heat recovery box 4. As the flue gas passes through the first heat exchange tubes 403, it transfers the heat it carries to the water, achieving heat recovery. The heated water can be used in other processes requiring a heat source. Simultaneously, after heat exchange in the first heat exchange tubes 403, the flue gas collects in the first gas collection box 402 and is then discharged through the exhaust pipe 404. In another part of the waste heat recovery box 4, external air enters the second distribution box 5 through the air inlet pipe 501 and is evenly distributed into multiple second heat exchange tubes 503. These second heat exchange tubes 503 are also surrounded by hot water in the waste heat recovery tank 4. When air passes through the second heat exchange tubes 503, it absorbs heat from the water and becomes preheated air. The preheated air is collected in the second gas collection box 502 and then sent back to the incineration unit 1 through the delivery pipe 504 for combustion support and to improve combustion efficiency. In addition, the filter screen 203 in the flue gas filter box 2 is driven by the motor 301 in the drive device 3 to rotate the rotating shaft 205 and the scraper 206, continuously scraping off the dust on the filter screen 203 to prevent clogging. When the water temperature in the waste heat recovery tank 4 reaches the set value, hot water can be discharged through the drain pipe, while new cold water can be added through the inlet pipe to maintain the continuous operation of the system.

[0027] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A waste incineration treatment flue gas waste heat recycling device, comprising an incineration device (1), characterized in that: The incineration device (1) is connected with a flue gas filtering box (2) on one side, the flue gas filtering box (2) is connected with a waste heat recovery box (4) on one side, a first gas distribution box (401) is fixedly connected to the inside of the waste heat recovery box (4) on the upper end of one side, a first gas collecting box (402) is fixedly connected to the inside of the waste heat recovery box (4) on the lower end of the middle of the rear end face, the first gas distribution box (401) and the first gas collecting box (402) are communicated through a plurality of first heat exchange pipes (403), a second gas distribution box (5) is fixedly arranged on the upper end of the inside of the waste heat recovery box (4), a second gas collecting box (502) is fixedly arranged on the lower end face of the inside of the waste heat recovery box (4), the second gas distribution box (5) and the second gas collecting box (502) are communicated through a plurality of second heat exchange pipes (503).

2. The waste incineration flue gas waste heat recycling device according to claim 1, characterized in that: The upper end face of the flue gas filtering box (2) is communicated with the flue gas filtering box (2) through a smoke inlet pipe (201) on one side, and the flue gas filtering box (2) is communicated with the first gas distribution box (401) in the waste heat recovery box (4) through a smoke conveying pipe (202) on the other side.

3. The waste incineration flue gas waste heat recycling device according to claim 2, characterized in that: The lower end of the smoke conveying pipe (202) is provided with a filter screen (203) between the inside of the flue gas filtering box (2), the lower end face of the inside of the flue gas filtering box (2) is fixedly connected with a limiting pipe (204) on one side, the limiting pipe (204) is rotatably connected with a rotating shaft (205) inside, and the rotating shaft (205) extends to the lower end of the filter screen (203) and is fixedly connected with a plurality of scraper rods (206) on the upper end.

4. The waste incineration flue gas waste heat recycling device according to claim 3, characterized in that: The lower end face of the flue gas filtering box (2) is fixedly connected with a driving device (3) on one side, the driving device (3) is fixedly provided with a motor (301) inside, and the lower end of the rotating shaft (205) extends to the inside of the driving device (3) and is fixedly connected with the output shaft of the motor (301).

5. The waste incineration flue gas waste heat recycling device according to claim 1, characterized in that: The rear end face of the waste heat recovery box (4) is fixedly connected with an exhaust pipe (404) on the lower end, and the exhaust pipe (404) is communicated with the inside of the first gas collecting box (402).

6. The waste incineration flue gas waste heat recycling device according to claim 1, characterized in that: The upper end face of the waste heat recovery box (4) is fixedly connected with an air inlet pipe (501), the lower end of the air inlet pipe (501) is communicated with the inside of the second gas distribution box (5), the lower end face of the waste heat recovery box (4) is fixedly connected with a conveying pipe (504), the upper end of the conveying pipe (504) is communicated with the inside of the second gas collecting box (502), and the conveying pipe (504) is communicated with the gas inlet of the incineration device (1) on one side.

7. The device according to claim 1, characterized in that: The front end face of the waste heat recovery box (4) is fixedly provided with a water inlet pipe on the upper end, and the front end face of the waste heat recovery box (4) is fixedly provided with a drain pipe on the lower end.

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