Flue gas waste heat recovery device for hazardous waste incineration treatment

Abstract

The utility model provides a hazardous waste incineration treatment flue gas waste heat recovery device which comprises a box body connected with a hazardous waste incineration treatment device, a plurality of filter plates are movably installed in the box body, a detachable filter screen is installed in each filter plate, and the filter screen is connected with the hazardous waste incineration treatment device. A heat exchange pipe is installed in the box body and located above the filter plates, and a pressure gauge is installed on the front side face of the box body and located below each filter plate. The filter plate can intercept dust particles in high-temperature flue gas, the dust particles in the high-temperature flue gas are prevented from being adsorbed to the surface of the heat exchange tube, the heat exchange efficiency of the heat exchange tube is prevented from being influenced, and the service life of the heat exchange tube can be prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of flue gas treatment, and particularly relates to a waste incineration flue gas waste heat recovery device. Background Technique

[0002] When incinerating dangerous goods, corresponding devices are needed for combustion treatment. A large amount of flue gas will be generated during the combustion process. In order to improve resource utilization rate, the waste heat of the flue gas can be recovered and reused.

[0003] However, due to the existence of a large number of dust particles in the flue gas after waste incineration, the existing waste incineration flue gas waste heat recovery devices have the following deficiencies: 1. The surface of the heat exchanger used is prone to adsorb the dust particles. After a period of time, a thick layer of dirt will form on the surface of the heat exchanger, thereby reducing the waste heat recovery efficiency of the heat exchanger; 2. Some flue gas waste heat recovery devices will install a filter screen in front of the heat exchanger to block part of the dust particles. However, when cleaning and replacing the filter screen inside the device, the incineration equipment needs to be shut down, which will affect the operation efficiency of the incineration equipment and is inconvenient to use. Content of the Utility Model

[0004] In order to solve the above technical problems, the utility model provides a waste incineration flue gas waste heat recovery device, and the technical scheme adopted is as follows:

[0005] A waste incineration flue gas waste heat recovery device includes a box body connected to a waste incineration treatment device. A plurality of filter plates are movably installed inside the box body. A detachable filter screen is installed inside each filter plate. Heat exchange tubes are installed above the filter plates inside the box body. Pressure gauges are installed below each filter plate on the front side of the box body;

[0006] One end of the box body is provided with an air inlet below the filter plate, and the other end of the box body is provided with an air outlet above the filter plate. High-temperature flue gas flows into the box body from the air inlet and then flows out of the box body through the air outlet.

[0007] Further, mounting plates for embedding the filter plates are provided on both side surfaces inside the box body. The filter plates are slidably connected to the mounting plates, which is convenient for pulling out the filter plates.

[0008] Further, blocks for supporting the filter screen are provided at the four corners of the filter plate, and the filter screen is directly placed on the blocks for fixation.

[0009] Further, sliders are provided on both sides of the filter plate and are embedded in the mounting plates. The filter plates are pulled out by sliding the sliders in the mounting plates.

[0010] Furthermore, blocking plates are installed at both ends of the two side plates of the filter plate, and the blocking plates are movably arranged.

[0011] Furthermore, the blocking plate can rotate. When the blocking plate is in a rotating state, its lower surface fits with the upper surface of the filter net, which can fix the position of the filter net and prevent the filter net from being lifted by the gas pressure.

[0012] Furthermore, the rear side plate of the filter plate is in a "T" shape, which can not only play a role in limiting, but also its side can be closely attached to the inner wall of the box body.

[0013] Furthermore, bolt holes for installing bolts are provided at both ends of the front side plate of each filter plate. Through the bolts, the filter plate can be fixed to the box body.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] 1. In the utility model, the filter plate can intercept dust particles in the high-temperature flue gas, avoid the dust particles in the high-temperature flue gas from adsorbing to the surface of the heat exchange tube, prevent the heat exchange efficiency of the heat exchange tube from being affected, and can improve the service life of the heat exchange tube.

[0016] 2. In the utility model, multiple filter plates are adopted, and the filter plates are installed in a pull-out structure. After the filter net in the filter plate is blocked by dust particles, the increase in the pressure value in the corresponding area can be observed through the pressure gauge, so as to know that a certain position of the filter plate is blocked. And the filter plate can be pulled out and the corresponding filter net can be replaced without stopping the machine, so as to replace the utilization efficiency of the flue gas and ensure the stable and long-term operation of the heat exchanger. Description of the Drawings

[0017] Figure 1 is the overall structural schematic diagram of the utility model;

[0018] Figure 2 is the three-dimensional structural schematic diagram of the heat exchange tube of the utility model;

[0019] Figure 3 is the internal structural schematic diagram of the box body of the utility model;

[0020] Figure 4 is the connection structural schematic diagram of the stopper and the filter plate of the utility model;

[0021] Figure 5 is the three-dimensional structural schematic diagram of the filter plate of the utility model;

[0022] Figure 6 is the schematic diagram of the retracted state of the blocking plate of the utility model;

[0023] Figure 7It is a schematic diagram of the connection structure between the filter plate and the box body of the utility model.

[0024] In the figure:

[0025] 1 - Box body, 11 - Air inlet, 12 - Exhaust port, 13 - Mounting plate, 2 - Filter plate, 21 - Filter net, 22 - Stopper, 23 - Slide block, 24 - Blocking plate, 25 - Bolt hole, 3 - Heat exchange tube, 4 - Pressure gauge. Specific implementation manners

[0026] In order to enable those skilled in the art to better understand the solution of the present utility model, the technical solutions in the embodiments of the present utility model will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0027] As shown in the appendix Figure 1-7 as shown.

[0028] A waste incineration treatment flue gas waste heat recovery device includes a box body 1 connected to a waste incineration treatment device. An air inlet 11 connected to the waste incineration treatment device for high-temperature flue gas to enter is opened below one end of the box body 1. The high-temperature flue gas flowing out of the waste incineration treatment device enters the lower part inside the box body 1 through the air inlet 11. An exhaust port 12 is opened above the other end of the box body 1. The filtered high-temperature flue gas can be discharged through the exhaust port 12 after heat exchange. Mounting plates 13 for embedding filter plates 2 are symmetrically welded on both sides inside the box body 1 and between the air inlet 11 and the exhaust port 12. The mounting plates 13 are in a "U" shape, and the two openings are arranged opposite to each other. The rear side plate of the filter plate 2 is in a "T" shape. When pulling out the filter plate 2, it can not only play a limiting role, but also fit with the inner wall of the box body 1 to prevent the flue gas from flowing out. A detachable filter net 21 is placed in the middle position of the filter plate 2, and the filter net 21 can be replaced. A heat exchange tube 3 is installed above the exhaust port 12 inside the box body 1. The heat exchange tube 3 is at a certain distance from the exhaust port 12 below, which is beneficial to the storage of the filtered high-temperature flue gas at the top inside the box body 1 and is beneficial to the heat exchange heating treatment of the liquid in the heat exchange tube 3. A pressure gauge 4 for checking the pressure is installed on the front side of the box body 1 and below each filter plate 2. By observing the pressure gauge 4, it can be known whether the filter net 21 is blocked and whether it needs to be replaced.

[0029] Rectangular blocks 22 for supporting the filter mesh 21 are welded at the four corners inside the filter plate 2. Sliders 23 are welded on both sides of the filter plate 2. The sliders 23 are fitted into the mounting plate 13 to fix the position of the filter plate 2. Slots for installing the blocking plate 24 are provided at both ends above the two side plates of the filter plate 2. The blocking plate 24 is rotatable. When the blocking plate 24 rotates to be above the filter mesh 21, the lower surface of the blocking plate 24 fits with the upper surface of the filter mesh 21 to fix the position of the filter mesh 21.

[0030] Bolt holes 25 for installing bolts are provided at both ends of the front side plate of each filter plate 2. The filter plate 2 and the box body 1 can be fixed by bolts, which can prevent the situation that the filter plate 2 is extruded out of the box body 1 due to excessive flue gas and too much pressure in the box body 1.

[0031] The high-temperature flue gas flowing out of the hazardous waste incineration treatment device first enters the lower part inside the box body 1 through the air inlet 11. Then, due to the characteristic of hot air rising, the high-temperature flue gas in the lower part of the box body 1 spreads upward. Then the high-temperature flue gas passes through the filter mesh 21 inside the filter plate 2 for filtration. Then the high-temperature flue gas after filtering out dust particles passes through the filter mesh 21 and reaches the upper part inside the box body 1. Then the high-temperature flue gas after filtering out dust particles conducts heat exchange heating treatment on the liquid in the heat exchange tube 3. Finally, the high-temperature flue gas after filtering out dust particles flows out of the box body 1 through the exhaust port 12.

[0032] During the operation of the device, the pressure value in the corresponding area can be observed through the pressure gauge 4. When the pressure value of the lowermost pressure gauge 4 increases, it means that the filter screen 21 in the lowermost filter plate 2 is blocked. When the pressure values of the two lower pressure gauges 4 both increase, it means that the filter screen 21 in the middle filter plate 2 is blocked. When the pressure values of all three pressure gauges 4 increase, it means that the filter screen 21 in the upper filter plate 2 is blocked. Then, the staff needs to replace the filter screen 21 in the blocked filter plate 2. Then, the staff holds the handle on the front side plate of the filter plate 2 where the filter screen 21 needs to be replaced, and then gently pulls the filter plate 2 outwards to pull the internal filter screen 21 out of the box body 1. Since the rear side plate of the filter plate 2 is "T"-shaped, when pulling out the filter plate 2, the rear side plate of the filter plate 2 can play a limiting role to prevent the filter plate 2 from falling out of the box body 1. In addition, the rear side plate of the "T"-shaped filter plate 2 fits against the inner wall of the box body 1, and the flue gas cannot flow out of the box body 1. At the same time of replacing the filter screen 21, there is no need to stop the machine. Then, rotate the blocking plate 24 and move the blocking plate 24 out from above the filter screen 21. Then, the staff takes out the blocked filter screen 21 from the filter plate 2. Then, the staff places the new filter screen 21 on the block 22 in the filter plate 2. Then, rotate the blocking plate 24 again and move the blocking plate 24 above the filter screen 21. The lower surface of the blocking plate 24 fits against the upper surface of the filter screen 21 to fix the position of the filter screen 21. Finally, the staff holds the handle on the front side plate of the filter plate 2 with the replaced filter screen 21, and then pushes the filter plate 2 inwards. Finally, align the bolt with the bolt hole 25 and rotate the bolt clockwise to fix the position of the filter plate 2 and the box body 1.

[0033] Any technical solution using the technical solution of the present invention, or any technical solution designed by those skilled in the art inspired by the technical solution of the present invention and achieving the above technical effects shall fall within the protection scope of the present invention.

Claims

1. A waste heat recovery device for flue gas from hazardous waste incineration treatment, comprising a housing (1) connected to the hazardous waste incineration treatment device, characterized in that: A plurality of filter plates (2) are movably mounted inside the box (1), a detachable filter screen (21) is mounted inside each filter plate (2), a heat exchange tube (3) is mounted inside the box (1) and above the filter plate (2), and a pressure gauge (4) is mounted on the front side of the box (1) and below each filter plate (2); An air inlet (11) is provided at one end of the box body (1) and located below the filter plate (2), and an air outlet (12) is provided at the other end of the box body (1) and located above the filter plate (2).

2. A hazardous waste incineration flue gas waste heat recovery device as claimed in claim 1, characterized in that: Both side surfaces inside the box body (1) are provided with mounting plates (13) for embedding the filter plate (2).

3. The device for recovering waste heat from flue gas during hazardous waste incineration as claimed in claim 1, characterized in that: Blocks (22) for supporting the filter screen (21) are provided at the four corners of the filter plate (2).

4. A hazardous waste incineration flue gas waste heat recovery device as claimed in claim 2, characterized in that: Slide blocks (23) embedded in the mounting plate (13) are provided on both sides of the filter plate (2).

5. The device for recovering waste heat from flue gas during hazardous waste incineration as claimed in claim 1, characterized in that: Blocking plates (24) are installed at both ends of the two side plates of the filter plate (2).

6. A hazardous waste incineration flue gas waste heat recovery device as claimed in claim 5, characterized in that: When the blocking plate (24) is in a rotating state, its lower surface is in contact with the upper surface of the filter screen (21).

7. The device for recovering waste heat from flue gas during hazardous waste incineration as claimed in claim 1, characterized in that: The rear side plate of the filter plate (2) is in a "T" shape.

8. The device for recovering waste heat from flue gas during hazardous waste incineration as claimed in claim 1, characterized in that: Both ends of the front side plate of each filter plate (2) are provided with bolt holes (25) for installing bolts.

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