Flue gas filtering assembly for waste incineration

Abstract

The utility model discloses a flue gas filtering assembly for waste incineration, relates to the field of waste incineration treatment, and aims to solve the problems that in the prior art, flue gas is filtered only through a filter screen, but the amount of particulate matters and dust in the flue gas generated by incineration is large, blockage is caused in a short time when the filter screen is adopted for filtering, and the waste is wasted. Therefore, the smoke discharge is influenced. An L-shaped smoke inlet pipe is fixedly connected to the lower end of the filtering barrel, the upper end of the L-shaped smoke inlet pipe penetrates through the lower end face of the filtering barrel and extends to the lower end in the filtering barrel, an annular pressure water pipe is fixedly arranged in the middle of the interior of the filtering barrel, and a plurality of atomizing nozzles are fixedly connected to the inner side of the annular pressure water pipe in an annular array mode; a filter screen is fixedly arranged at the upper end of the middle of the interior of the filter barrel, a limiting pipe is fixedly arranged in the middle of the filter screen, a rotating shaft is rotationally connected into the limiting pipe, and the lower end of the rotating shaft extends out of the lower end face of the filter screen and is fixedly connected with a plurality of scraping rods.

Description

Technical Field

[0001] This utility model relates to the field of waste incineration treatment, specifically a flue gas filtration component for waste incineration. 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] Existing technologies only filter flue gas through filter screens. However, the flue gas produced by incineration contains a large amount of particulate matter and dust. Filter screens will become clogged in a short time, which will affect the discharge of flue gas. Therefore, there is an urgent need in the market to develop a flue gas filtration component for waste incineration to help people solve the existing problems. Utility Model Content

[0005] The purpose of this utility model is to provide a flue gas filtration component for waste incineration, in order to solve the problem that the existing technologies mentioned in the background art only filter the flue gas through a filter screen. However, the flue gas produced by incineration contains a large amount of particulate matter and dust, and the filter screen will become clogged in a short time, thus affecting the discharge of flue gas.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a flue gas filtration assembly for waste incineration, comprising a filter barrel, an L-shaped flue gas inlet pipe fixedly connected to the lower end of the filter barrel, the upper end of the L-shaped flue gas inlet pipe extending through the lower end face of the filter barrel to the lower end of the filter barrel interior, a conical rainproof cap fixedly connected to the upper end of the L-shaped flue gas inlet pipe and inside the filter barrel, an annular pressure water pipe fixedly disposed in the middle of the filter barrel interior, a plurality of atomizing nozzles fixedly connected in an annular array inside the annular pressure water pipe, a filter screen fixedly disposed at the upper middle part of the filter barrel interior, a limiting tube fixedly disposed in the middle of the filter screen, a rotating shaft rotatably connected inside the limiting tube, the lower end of the rotating shaft extending out of the lower end face of the filter screen and fixedly connected to a plurality of scraper rods.

[0007] Preferably, the upper end of the L-shaped smoke inlet pipe is fixedly connected to the lower end face of the conical rain cap by multiple support rods.

[0008] Preferably, a water supply pipe is fixedly connected to one side of the annular pressure water pipe, and one end of the water supply pipe extends through the filter barrel to the outside.

[0009] Preferably, a support ring is fixedly connected to the outer end face of the filter screen, and the outer side of the support ring is fixedly connected to the inner wall of the filter barrel.

[0010] Preferably, a drain pipe is fixedly installed at the lower end of one side of the filter barrel, a flow regulating valve is fixedly installed on the drain pipe, and an exhaust pipe is fixedly connected to the upper end of one side of the filter barrel.

[0011] Preferably, a stabilizing tube is fixedly installed at the middle of the upper end face of the filter barrel, and a driving device is fixedly installed at the middle of the upper end of the filter barrel, with a motor fixedly installed inside the driving device.

[0012] Preferably, the upper end of the rotating shaft passes through the stabilizing tube and extends into the drive device, where it is fixedly connected to the motor output shaft.

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

[0014] (1) In this utility model, by adding an annular pressure water pipe and atomizing nozzle, the flue gas entering the filter assembly is initially sprayed, which effectively reduces the content of particulate matter and dust in the flue gas, reduces the burden on the subsequent filter screen, extends the service life of the filter screen, and also improves the overall filtration efficiency.

[0015] (2) In this utility model, the drive device drives the rotating shaft and scraper to rotate, continuously scraping the impurities on the lower end of the filter screen, effectively preventing the filter screen from clogging, ensuring the continuity and stability of flue gas filtration, and improving the efficiency and safety of waste incineration.

[0016] (3) In this utility model, by setting the stabilizing tube and the limiting tube, not only is the stability and accuracy of the rotating shaft ensured during the rotation process, and the problem of uneven scraping of the scraper or damage to the filter screen caused by vibration or offset is prevented, but also the rotating shaft is provided with effective support and positioning, making the entire filter assembly more stable and reliable during operation. Attached Figure Description

[0017] Figure 1 This is a front view of a flue gas filtration assembly for waste incineration 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 present invention;

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

[0021] In the diagram: 1. Filter canister; 101. Drain pipe; 102. Flow regulating valve; 103. Exhaust pipe; 104. Stabilizing pipe; 2. L-shaped smoke inlet pipe; 201. Conical rain cap; 202. Support rod; 3. Annular pressure water pipe; 301. Atomizing nozzle; 302. Water supply pipe; 4. Filter screen; 401. Support ring; 402. Limiting pipe; 5. Rotating shaft; 501. Scraper; 6. Drive device; 601. Motor. 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 flue gas filtration assembly for waste incineration, comprising a filter barrel 1, an L-shaped flue gas inlet pipe 2 fixedly connected to the lower end of the filter barrel 1, the upper end of the L-shaped flue gas inlet pipe 2 extending through the lower end face of the filter barrel 1 to the lower end of the interior of the filter barrel 1, a conical rainproof cap 201 fixedly connected to the upper end of the L-shaped flue gas inlet pipe 2 inside the filter barrel 1, and a plurality of support rods 202 fixedly connecting the upper end of the L-shaped flue gas inlet pipe 2 and the lower end face of the conical rainproof cap 201. The flue gas from the waste incinerator enters the interior of the filter barrel 1 through the L-shaped flue gas inlet pipe 2, and the flue gas entering from the upper end of the L-shaped flue gas inlet pipe 2 is dispersed by the conical rainproof cap 201.

[0024] Please see Figure 2-4An annular pressure water pipe 3 is fixedly installed in the middle of the filter barrel 1. Multiple atomizing nozzles 301 are fixedly connected in a ring array inside the annular pressure water pipe 3. A water supply pipe 302 is fixedly connected to one side of the annular pressure water pipe 3. One end of the water supply pipe 302 extends through the filter barrel 1 to the outside. Water is pressurized and supplied to the water supply pipe 302 from the outside, causing the water supply pipe 302 to supply water to the annular pressure water pipe 3. Finally, the water is sprayed out through the multiple atomizing nozzles 301 on the annular pressure water pipe 3, spraying the smoke dispersed by the conical rain cap 201 to treat the smoke... Under the spraying action, particulate matter and dust in the air combine with water vapor and fall into the filter barrel 1, achieving preliminary treatment of the flue gas and greatly reducing the particulate matter and dust content in the flue gas. A drain pipe 101 is fixedly installed at the lower end of one side of the filter barrel 1, and a flow regulating valve 102 is fixedly installed on the drain pipe 101. However, when the sewage level inside the filter barrel 1 is higher than the height of the drain pipe 101, the flow regulating valve 102 is opened to discharge the sewage. At the same time, the opening degree of the flow regulating valve 102 is controlled to keep the sewage level higher than the height of the drain pipe 101.

[0025] Please see Figure 2-3 A filter screen 4 is fixedly installed at the upper middle part of the filter barrel 1. The flue gas, after being treated by spraying, finally enters the upper part of the filter barrel 1 after being filtered by the filter screen 4. An exhaust pipe 103 is fixedly connected to the upper side of the filter barrel 1, and the flue gas is discharged from the exhaust pipe 103. A limit tube 402 is fixedly installed in the middle of the filter screen 4. A rotating shaft 5 is rotatably connected inside the limit tube 402. The lower end of the rotating shaft 5 extends out of the lower end face of the filter screen 4 and is fixedly connected to multiple scraper rods 501. A support ring 401 is fixedly connected to the outer end face of the filter screen 4. The outer side of the ring 401 is fixedly connected to the inner wall of the filter barrel 1. A stabilizing tube 104 is fixedly installed in the middle of the upper end face of the filter barrel 1. A driving device 6 is fixedly installed in the middle of the upper end of the filter barrel 1. A motor 601 is fixedly installed inside the driving device 6. The upper end of the rotating shaft 5 passes through the stabilizing tube 104 and extends into the driving device 6 and is fixedly connected to the output shaft of the motor 601. The motor 601 drives the rotating shaft 5 to rotate, which in turn drives multiple scrapers 501 to rotate, continuously scraping the lower end face of the filter screen 4 to prevent clogging.

[0026] Working Principle: During operation, the flue gas generated by the waste incinerator first enters the filter barrel 1 through the L-shaped flue gas inlet pipe 2. Under the action of the conical rain cap 201, the gas disperses, increasing the contact area between the flue gas and subsequent treatment devices. Subsequently, water is pressurized and supplied to the water supply pipe 302 through an external water supply system. The water enters the annular pressure water pipe 3 and is evenly sprayed out through multiple atomizing nozzles 301, forming a fine water mist that sprays the dispersed flue gas. This step effectively combines particulate matter and dust in the flue gas with water vapor, increasing their weight and causing them to fall to the bottom of the filter barrel 1, achieving initial purification. The sprayed flue gas continues to rise, passing through the filter screen 4 for secondary filtration, further removing fine particulate matter. Simultaneously, the motor 601 drives the rotating shaft 5 and its scraper 501 to rotate, continuously scraping off impurities adhering to the lower surface of the filter screen 4, preventing clogging and ensuring filtration efficiency. Finally, the purified flue gas is discharged through the exhaust pipe 103. When the accumulated sewage inside the filter tank 1 reaches a certain height, the sewage discharge can be controlled by adjusting the flow regulating valve 102 to maintain the continuous and stable 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 flue gas filtering assembly for waste incineration, comprising a filtering barrel (1), characterized in that: The filter barrel (1) is fixedly connected to an L-shaped smoke inlet pipe (2) at its lower end. The upper end of the L-shaped smoke inlet pipe (2) extends through the lower end face of the filter barrel (1) to the lower end of the filter barrel (1). A conical rain cap (201) is fixedly connected to the upper end of the L-shaped smoke inlet pipe (2) inside the filter barrel (1). An annular pressure water pipe (3) is fixedly installed in the middle of the filter barrel (1). Multiple atomizing nozzles (301) are fixedly connected to the annular array inside the annular pressure water pipe (3). A filter screen (4) is fixedly installed at the upper middle part of the filter barrel (1). A limiting tube (402) is fixedly installed in the middle of the filter screen (4). A rotating shaft (5) is rotatably connected inside the limiting tube (402). The lower end of the rotating shaft (5) extends out of the lower end face of the filter screen (4) and is fixedly connected to multiple scraper rods (501).

2. A flue gas filtration assembly for waste incineration according to claim 1, characterized in that: The upper end of the L-shaped smoke inlet pipe (2) is fixedly connected to the lower end face of the conical rain cap (201) by multiple support rods (202).

3. The flue gas filtration assembly for waste incineration according to claim 1, characterized in that: A water supply pipe (302) is fixedly connected to one side of the annular pressure water pipe (3), and one end of the water supply pipe (302) extends through the filter bucket (1) to the outside.

4. The flue gas filtration assembly for waste incineration according to claim 1, characterized in that: A support ring (401) is fixedly connected to the outer end face of the filter screen (4), and the outer side of the support ring (401) is fixedly connected to the inner wall of the filter barrel (1).

5. The flue gas filtration assembly for waste incineration according to claim 1, characterized in that: A drain pipe (101) is fixedly installed on the lower end of one side of the filter barrel (1), a flow regulating valve (102) is fixedly installed on the drain pipe (101), and an exhaust pipe (103) is fixedly connected to the upper end of one side of the filter barrel (1).

6. The flue gas filtration assembly for waste incineration according to claim 1, characterized in that: A stabilizing tube (104) is fixedly installed in the middle of the upper end face of the filter barrel (1), and a driving device (6) is fixedly installed in the middle of the upper end of the filter barrel (1). A motor (601) is fixedly installed inside the driving device (6).

7. A flue gas filtration assembly for waste incineration according to claim 6, characterized in that: The upper end of the rotating shaft (5) passes through the stabilizing tube (104) and extends into the drive device (6) and is fixedly connected to the output shaft of the motor (601).

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