Spraying and filtering device of self-cleaning garbage incinerator

Abstract

The utility model provides a self-cleaning garbage incinerator spraying and filtering device, and relates to the technical field of garbage incineration treatment equipment.The self-cleaning garbage incinerator spraying and filtering device comprises an incinerator, a spraying tower and a smoke exhaust pipe communicating the incinerator with the spraying tower, the smoke exhaust pipe is connected into the spraying tower, a pipe opening of the smoke exhaust pipe is arranged downwards, and a lower filtering net parallel to the pipe opening is arranged below the pipe opening; an aeration pipe is arranged below the lower filter screen and is connected with an aeration machine outside the spray tower through an air inlet pipe, and a water inlet pipe is further arranged at the bottom of the spray tower. The aeration machine is started, clean water in the spray tower is aerated through the air inlet pipe and the aeration pipe, so that the clean water in the spray tower can vibrate, then solid particles attached to the filter screen are brought into the water, the water is stirred by aeration for cleaning, bubbles generated by the aeration pipe are used for disturbing the water, and the cleaning effect is improved. Dirt and sediments on the filter screen can be effectively stripped and removed; aeration agitating water can ensure that water flow uniformly covers the surface of the filter screen.

Description

Technical Field

[0001] This application relates to the technical field of waste incineration treatment equipment, and more specifically, to a self-cleaning spray filtration device for waste incinerators. Background Art

[0002] The flue gas treatment device of a waste incinerator is a system specifically designed to treat harmful gases and particulate matter generated during the waste incineration process. The purpose of these devices is to reduce the impact on the environment and public health. The flue gas generated by the incinerator combustion carries a large amount of solid particles. If directly discharged into the air, it will pollute the surrounding air. In the existing technologies, the solutions for treating waste incineration flue gas are as follows:

[0003] (1) Chinese invention patent with publication number CN109931617A, a harmless waste incineration treatment process, including a combustion furnace, a flue gas combustion chamber, a cooling and dust removal tower, a water bath cabinet, a spray tower, an aeration microbial degradation tank, an activated carbon adsorption box, a microfilter, a sewage purification pool, and a flue gas discharge port. The water bodies used in the treatment process all contain organic solvents. All the water bodies enter the sewage purification pool through pipelines, and after purification, the reclaimed water is reused without external discharge. The flue gas is treated step by step through the processes of flue gas combustion, cooling, dust removal, dioxin removal, and odor removal. The flue gas is treated by a combination of physical methods and microorganisms to remove the soot and dioxin generated by waste incineration.

[0004] (2) Chinese utility model patent with publication number CN218871684U, a new waste incineration spray treatment device, which is provided with a coarse filter screen and a fine filter screen. Multiple support rods are fixedly connected to the lower end inside the box body. One end of the support rod is fixedly connected with a disperser. The lower end of the disperser is fixedly connected with multiple outer spray pipes, and the lower end of the disperser is fixedly connected with multiple inner spray pipes. Through the settings of the coarse filter screen and the fine filter screen, the particulate impurities in the smoke are filtered to prevent the particulate impurities from floating upwards. Through the settings of the disperser, the outer spray pipes, the inner spray pipes, and the dispersion net, the spray uniformity and area are increased, thereby increasing the spray area and uniformity of the particulate impurities.

[0005] However, the cleaning and filtration system of the existing waste incineration flue gas treatment device uses water flow flushing. In the flue gas pipeline, the flow pattern of the water flow is inconsistent near the pipe wall and at the pipe center. The water flow at the pipe wall is in a laminar flow state due to the friction and pressure of the pipe wall, while the water flow at the pipe center is in a turbulent flow state. However, the diffusion pattern of the flue gas is from the center to the outside, and as the diffusion flow rate slows down, the particle deposition at the pipe wall is serious, and it is difficult to fully clean the filter screen through flushing. Summary of the Invention

[0006] To solve the above problems, the technical solution adopted in this application is a self-cleaning garbage incinerator spray filtration device, including an incinerator, a spray tower and a smoke exhaust pipe connecting the incinerator and the spray tower;

[0007] The smoke exhaust pipe is connected to the interior of the spray tower with the pipe mouth set downward, a lower filter screen parallel to the pipe mouth is set below the pipe mouth, an aeration pipe is set below the lower filter screen, the aeration pipe is connected to the aerator outside the spray tower through the air inlet pipe, and a water inlet pipe is set at the bottom of the spray tower.

[0008] Optionally, the smoke exhaust pipe includes a horizontally arranged inlet pipe and a guide pipe arranged vertically to the inlet pipe.

[0009] Optionally, the guide pipe is connected to a smoke exhaust hood, the diameter of the smoke exhaust hood is larger than the diameter of the guide pipe, and the diameter of the smoke exhaust hood gradually increases from top to bottom.

[0010] Optionally, the diameter of the lower filter screen is greater than the outer diameter of the fume hood.

[0011] Optionally, a filter screen cylinder is arranged below the lower filter screen and perpendicular to the lower filter screen.

[0012] Optionally, a filter ring net is arranged on the outer ring of the smoke exhaust hood parallel to the smoke exhaust hood, and an upper filter net is arranged above the air inlet pipe.

[0013] Optionally, a guide bevel block is fixedly connected to the inner bottom surface of the spray tower, and the maximum horizontal height of the guide bevel block is flush with the lowest horizontal height of the water inlet pipe.

[0014] Optionally, a plurality of pillars are fixedly connected to positions on the bottom surface of the spray tower where no guide ramp is provided.

[0015] Optionally, a smoke pressure detection device is provided inside the smoke exhaust pipe.

[0016] Optionally, an inspection door is provided under the spray tower, and the inspection door is movably connected to the side wall of the spray tower through a hinge.

[0017] The beneficial effects of the self-cleaning garbage incinerator spray filter device provided by the present application are:

[0018] 1. By starting the aerator, gas passes through the inlet pipe and the aeration pipe to aerate the clean water in the spray tower, enabling the clean water to vibrate. Subsequently, the solid particles adhering to these structures are carried into the water. The aeration agitates the water and uses the bubbles generated by the aeration pipe to disturb the water, making the water flow have a higher impact force, which can effectively peel off and remove the dirt and sediment on the filter net. The aeration agitating the water can ensure that the water flow evenly covers the surface of the filter net, avoiding the problem of incomplete local cleaning. Compared with the traditional flushing method, the aeration agitating the water for cleaning can make more effective use of water resources, reduce water consumption, extend the service life of the filter net. Regular and effective cleaning can reduce the wear of the filter net and prolong its service life. This cleaning method can adjust the aeration volume and water pressure according to different filter net materials and pollution degrees to meet different cleaning requirements.

[0019] 2. As the filter net is used, dust and particulate matter will gradually accumulate on its surface, which will reduce the filtration efficiency of the filter net. Regular cleaning can remove these contaminants and restore the filtration ability of the filter net. The main function of the flue gas filter net is to purify the flue gas, remove harmful particles and pollutants therein, and keeping the filter net clean can ensure that the discharged flue gas meets the environmental protection standards and reduce the impact on the environment. If the filter net is not cleaned for a long time and accumulates too much dust and particles, it will increase the burden on the equipment, which may cause equipment failures or reduce its service life. Regular cleaning helps to keep the equipment in good working condition. When the filter net is blocked by contaminants, the resistance of the flue gas passing through the filter net will increase, resulting in more energy consumption for equipment such as fans to overcome the resistance. Cleaning the filter net can reduce the resistance, thereby saving energy. Reducing maintenance costs: reducing equipment failures caused by filter net blockage, avoiding expensive repair costs, and reducing production losses caused by equipment downtime. Brief Description of the Drawings

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art.

[0021] Figure 1 It is a schematic structural diagram of the self-cleaning waste incinerator spray filtration device of the present application;

[0022] Figure 2 It is a cross-sectional view of the spray tower in the self-cleaning waste incinerator spray filtration device of the present application;

[0023] Figure 3 It is Figure 2 An enlarged view of part A in

[0024] Description of reference numerals: 1, incinerator; 2, exhaust pipe; 3, spray tower; 4, inspection door; 5, inlet pipe; 6, guiding pipe; 7, exhaust hood; 8, lower connecting ring; 9, filter ring net; 10, guiding inclined block; 11, water inlet pipe; 12, support pillar; 13, receiving ring; 14, lower embedded ring; 15, filter net cylinder; 16, upper embedded ring; 17, lower filter net; 18, intake pipe; 19, vertical pipe; 20, aeration pipe; 21, upper connecting ring; 22, upper filter net. Detailed implementation manners

[0025] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application clearer and more understandable, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0026] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0027] It should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0028] As Figures 1 to 3 shown, a spray filtration device for a self-cleaning waste incinerator includes an incinerator 1, a spray tower 3, and an exhaust pipe 2 connecting the incinerator 1 and the spray tower 3.

[0029] The exhaust pipe 2 is connected to the inside of the spray tower 3 and the pipe orifice is arranged downward. A lower filter net parallel to the pipe orifice is arranged below the pipe orifice. An aeration pipe 20 is arranged below the lower filter net 17. The aeration pipe 20 is connected to an aerator outside the spray tower 3 through an intake pipe 18. A water inlet pipe 11 is also arranged at the bottom of the spray tower 3.

[0030] After the incinerator 1 processes garbage to generate flue gas, the flue gas enters the spray tower 3 through the exhaust pipe 2. At this time, the direction of the flue gas is downward and it leaves the exhaust pipe 2 and passes through the lower filter screen 17 to filter the particles in the flue gas. After a long time of operation, the lower filter screen 17 will gradually be blocked. At this time, clean water is injected into the spray tower 3 through the water inlet pipe 11 so that the water level of the clean water is at least higher than the lower filter screen 17. Then, the aerator is started to inject gas into the clean water for aeration. The gas generated by the aerator reaches below the lower filter screen 17 through the air inlet pipe 18 and the aeration pipe 20, so that the clean water therein can vibrate, and then the flue gas particles attached to the lower filter screen 17 are brought into the water. After the cleaning is completed, the sewage with flue gas particles is discharged through the water inlet pipe 11. There are aeration holes on the surface of the aeration pipe 20 to aerate the clean water and inject air into the clean water to make the clean water vibrate. In this embodiment, the aeration pipe 20 is communicated with the air inlet pipe 18 through the vertical pipe 19.

[0031] By starting the aerator, the gas enters the spray tower in the order of the air inlet pipe 18, the vertical pipe 19, and the aeration pipe 20 to aerate the clean water therein, so that the clean water therein can vibrate, and then the solid particles attached to the lower filter screen 17 are brought into the water. The aeration agitates the water to clean and uses the bubbles generated by the aeration pipe to disturb the water, making the water flow have a higher impact force, which can effectively peel off and remove the dirt and sediment on the filter screen; the aeration agitates the water can ensure that the water flow evenly covers the surface of the lower filter screen 17 to avoid the problem of incomplete local cleaning; compared with the traditional flushing method, the aeration agitating water cleaning can make more effective use of water resources and reduce water consumption; improve the service life of the filter screen: regular and effective cleaning can reduce the wear of the filter screen and extend its service life; this cleaning method can adjust the aeration volume and the water pressure according to different filter screen materials and pollution degrees to meet different cleaning requirements.

[0032] With the use of the filter screen, dust and particulate matter will gradually accumulate on its surface, which will reduce the filtering efficiency of the filter screen. Regular cleaning can remove these contaminants and restore the filtering ability of the filter screen; the main function of the flue gas filter screen is to purify the flue gas, remove harmful particles and pollutants therein, and keeping the filter screen clean can ensure that the discharged flue gas meets environmental protection standards and reduce the impact on the environment. If the filter screen is not cleaned for a long time and too much dust and particles accumulate, it will increase the burden on the equipment, may cause equipment failures or reduce its service life. Regular cleaning helps to keep the equipment in good working condition; when the filter screen is blocked by contaminants, the resistance of the flue gas passing through the filter screen will increase, resulting in more energy consumption by equipment such as fans to overcome the resistance. Cleaning the filter screen can reduce the resistance, thereby saving energy; reducing maintenance costs: reducing equipment failures caused by filter screen blockage, avoiding expensive repair costs, and reducing production losses caused by equipment downtime. This application does not change the conventional structures such as the spraying device, the swirl plate and the packing layer in the spray tower 3. Although not shown in the figure, structures such as the spraying device, the swirl plate and the packing layer are arranged above the spray tower 3 in the same way as in the conventional spray tower 3.

[0033] In another embodiment of the present application, as Figure 2 and Figure 3 shown, the exhaust pipe 2 includes an inlet pipe 5 arranged horizontally and a guiding pipe 6 arranged perpendicular to the inlet pipe 5. Eddy currents and turbulences are likely to occur at the right-angle turning of the inlet pipe 5 and the guiding pipe 6. These flow phenomena will further increase the pressure loss and cause the particulate matter in the flue gas to deposit at the turning, and then naturally fall into the spray tower 3, improving the separation efficiency of the flue gas particles and the flue gas.

[0034] In another embodiment of the present application, as Figure 3 shown, the guiding pipe 6 is connected with an exhaust hood 7. The diameter of the exhaust hood 7 is larger than that of the guiding pipe 6, and the diameter of the exhaust hood 7 gradually expands from top to bottom. The inner diameter of the exhaust hood 7 gradually expands from top to bottom, so that its volume also gradually increases from top to bottom, which has the effect of slowing down the flow velocity of the flue gas, making the velocity of the flue gas passing through the lower filter screen 17 slow down, which helps to increase the collision probability between the lower filter screen 17 and the flue gas particles and improve the interception ability.

[0035] In another embodiment of the present application, as Figure 3 shown, the diameter of the lower filter screen 17 is larger than the outer diameter of the exhaust hood 7. The diameter of the lower filter screen 17 being larger than the outer diameter of the exhaust hood 7 enables the lower filter screen 17 to fully filter the flue gas released from the exhaust hood 7, reducing the leakage amount of the flue gas that has not passed through the lower filter screen 17 and improving the filtering effect.

[0036] In another embodiment of the present application, as Figure 3As shown in the figure, a filter screen cylinder 15 is vertically arranged below the lower filter screen 17. Under the agitation of the subsequent flue gas, the flue gas will not rise along the original path, but will expand radially outwards. After expansion, the flue gas will pass through the filter screen cylinder 15 to complete secondary filtration, enhancing the filtering ability for solid particles carried in the flue gas, reducing the space occupied by the filter screen. At the same time, since the filter screen cylinder 15 is below the lower filter screen 17, when cleaning the lower filter screen 17, the filter screen cylinder 15 can be cleaned simultaneously without a higher cleaning water level, reducing the cleaning water volume and aeration energy consumption. A number of support columns 12 are fixedly connected at positions on the inner bottom surface of the spray tower 3 where the guiding inclined blocks 10 are not provided. The upper ends of the number of support columns 12 are fixedly connected together with a ring-shaped receiving ring 13. A ring-shaped embedding groove is formed on the top surface of the receiving ring 13. A lower embedding ring 14 is detachably connected in the embedding groove. A ring-shaped filter screen cylinder 15 is fixedly connected to the top surface of the lower embedding ring 14. The upper end of the filter screen cylinder 15 is fixedly connected with an upper embedding ring 16. The inner ring of the upper embedding ring 16 is fixedly connected with a lower filter screen 17.

[0037] In another embodiment of the present application, as Figures 1 to 3 shown, a filter ring net 9 is arranged parallel to the outer ring of the smoke exhaust hood 7. An upper filter screen 22 is arranged above the air inlet pipe 2. In this embodiment, the upper filter screen is arranged above the inlet pipe 5. An upper connecting ring 21 located above the inlet pipe 5 is fixedly connected to the inner wall of the spray tower 3. The inner ring of the upper connecting ring 21 is fixedly connected with an upper filter screen 22. A lower connecting ring 8 is fixedly connected to the inner ring of the spray tower 3. A filter ring net 9 sleeved on the outer ring of the smoke exhaust hood 7 is fixedly connected to the inner ring of the lower connecting ring 8. Due to its own buoyancy, the flue gas will float upwards, pass through the filter ring net 9 to complete the third filtration. After passing through the filter ring net 9, the space that the flue gas can accommodate is larger, so its flow rate will correspondingly decrease, making it float upwards slowly. Finally, after passing through the upper filter screen 22 again, the fourth filtration of the flue gas is completed. After the flue gas is filtered four times, through devices such as the swirl plate, packing layer, and spray in the spray tower 3, after completing desulfurization, filtration and other work, it is discharged outwards to reduce the impact on the environment (the packing layer, swirl plate, spray and other devices are not shown in the figure).

[0038] In another embodiment of the present application, as Figure 3 shown, a guiding inclined block 10 is fixedly connected to the inner bottom surface of the spray tower 3. The highest horizontal height of the guiding inclined block 10 is flush with the lowest horizontal height of the water inlet pipe 11. The setting of the guiding inclined block 10 can prevent a stepped structure from appearing between the inner bottom surface of the spray tower 3 and the water inlet pipe 11, preventing a large amount of solid particles from staying in the spray tower 3.

[0039] In another embodiment of the present application, as Figure 3As shown, a plurality of support columns 12 are fixedly connected to the position on the inner bottom surface of the spray tower 3 where the guiding inclined blocks 10 are not provided. The support columns 12 can reduce the connection surface between the receiving ring 13 and the inner bottom surface of the spray tower 3, increase the gap, ensure the smooth flow of water, and finally pump out the dirty water through the water inlet pipe 11.

[0040] In another embodiment of the present application, as Figure 1 and Figure 3 shown, a flue gas pressure detection device is provided inside the pipeline of the exhaust pipe 2. Through the flue gas pressure detection device, the flue gas pressure inside the pipeline of the exhaust pipe 2 is detected, and according to the change of the flue gas pressure, the cycle of aeration cleaning of the lower filter screen 17 and the filter screen cylinder 15 is determined.

[0041] In another embodiment of the present application, as Figure 1 and Figure 3 shown, a maintenance door 4 is provided below the spray tower 3, and the maintenance door 4 is movably connected to the side wall of the spray tower 3 through a hinge. When the filtering effect of the lower filter screen 17, the filter screen cylinder 15, and the filter ring net 9 structures decreases due to excessive use time, by opening the maintenance door 4 fixed to the side wall of the spray tower 3 by a hinge, it is convenient for operators to repair, replace, and manually clean the lower filter screen 17, the filter screen cylinder 15 and other structures.

[0042] The above-described embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the various embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A self-cleaning garbage incinerator spray filtering device, comprising an incinerator, a spray tower and a smoke exhaust pipe connecting the incinerator and the spray tower, characterized in that: The smoke exhaust pipe is connected to the interior of the spray tower and the pipe mouth is set downward. A lower filter screen parallel to the pipe mouth is set below the pipe mouth. An aeration pipe is set below the lower filter screen. The aeration pipe is connected to the aerator outside the spray tower through an air inlet pipe. A water inlet pipe is set at the bottom of the spray tower.

2. The self-cleaning garbage incinerator spray filter device according to claim 1, characterized in that: The smoke exhaust pipe includes an inlet pipe arranged horizontally and a guide pipe arranged vertically to the inlet pipe.

3. The self-cleaning garbage incinerator spray filter device according to claim 2, characterized in that: The guide pipe is connected with a smoke exhaust hood, the diameter of the smoke exhaust hood is larger than the diameter of the guide pipe, and the diameter of the smoke exhaust hood gradually increases from top to bottom.

4. The self-cleaning garbage incinerator spray filter device according to claim 3, characterized in that: The diameter of the lower filter screen is greater than the outer diameter of the smoke exhaust hood.

5. The self-cleaning garbage incinerator spray filter device according to claim 1, characterized in that: A filter screen cylinder is arranged below the lower filter screen and perpendicular to the lower filter screen.

6. The self-cleaning garbage incinerator spray filter device according to claim 3, characterized in that: The outer ring of the smoke exhaust hood is parallel to the smoke exhaust hood and is provided with a filter ring net, and an upper filter net is provided above the air inlet pipe.

7. The self-cleaning garbage incinerator spray filter device according to any one of claims 1 to 6, characterized in that: A guide bevel block is fixedly connected to the inner bottom surface of the spray tower, and the maximum horizontal height of the guide bevel block is flush with the lowest horizontal height of the water inlet pipe.

8. The self-cleaning garbage incinerator spray filter device according to claim 7, characterized in that: A plurality of pillars are fixedly connected to the position where no guide inclined block is arranged on the bottom surface of the spray tower.

9. The self-cleaning garbage incinerator spray filter device according to claim 1 or 2, characterized in that: A smoke pressure detection device is arranged inside the smoke exhaust pipe.

10. The self-cleaning garbage incinerator spray filter device according to claim 1 or 2, characterized in that: An inspection door is arranged below the spray tower, and the inspection door is movably connected to the side wall of the spray tower through a hinge.

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