Waste incineration flue gas desulfurization equipment

Abstract

The utility model relates to waste incineration flue gas desulfurization equipment which comprises a desulfurization tower, the side face of the desulfurization tower is communicated with an air inlet pipe, a filter piece is installed on the air inlet pipe, a filter screen is arranged in the filter piece, an air cylinder is installed on the top of the filter piece, and a cleaning roller driven by a motor is installed on the bottom face of the filter piece. The air cylinder is connected with a piston rod for matched driving, the piston rod downwards penetrates through the filtering piece and is connected with the filtering net, the filtering net covers the inner cross section of the filtering piece, a sealing plate is arranged at the bottom of the filtering net, and a movable opening tightly spliced with the sealing plate is formed in the bottom of the filtering piece. The position of the cleaning roller is matched with that of the screen surface of the filter screen; the filter screen covers the inner cross section of the filter piece, smoke is completely filtered, then the air cylinder is matched with the piston rod, the filter screen is pushed to downwards extend out of the movable opening, impurities on the screen face are swept off through the cleaning roller installed on the outer side of the filter piece, and the cleaning roller is isolated from the smoke to be prevented from being corroded.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of waste incineration, in particular to a waste incineration flue gas desulfurization equipment. BACKGROUND

[0002] The tail gas generated by the waste incinerator needs to enter the flue gas purification device to remove the acid gases such as HCl, SO2, SO3 and HF in the flue gas, and to adsorb the harmful pollutants such as dioxin and heavy metals in the flue gas. The patent with the publication number CN202420333938.4 discloses a flue gas desulfurization equipment for waste incineration. In order to avoid that the larger impurities in the flue gas enter the desulfurization device and cause the filter screen inside the device to be blocked prematurely, a filter element is arranged on the inlet pipe, a plurality of filter screens are arranged inside the filter element, a plurality of connecting rods penetrating through the filter element are arranged, the connecting rods are driven to lift by a motor, and the cleaning brushes on the connecting rods remove the impurities adhered to the surface of the filter screen. The removed impurities fall into the collection cavity for unified treatment. However, the cleaning brushes are arranged in the filter element together with the filter screen, which will block the filter screen on one hand, and on the other hand, the cleaning brushes are easily eroded by the acid gases, accelerating the aging of the bristles of the cleaning brushes. In addition, the collection cavity is arranged at the lower end of the filter element, and when a large amount of flue gas flows into the inlet pipe, part of the flue gas will flow from the lower collection cavity, bypass the filter screen and directly enter the desulfurization device. Therefore, it is an urgent technical problem to design a waste incineration flue gas desulfurization equipment which can effectively filter the large impurities in the flue gas and prevent the flue gas from eroding the cleaning brushes. SUMMARY

[0003] The present application provides a waste incineration flue gas desulfurization equipment to solve the above problems.

[0004] The technical scheme of the present application is a waste incineration flue gas desulfurization equipment, which comprises a desulfurization tower, an inlet pipe is communicated with the side surface of the desulfurization tower, a filter element is arranged on the inlet pipe, a filter screen is arranged inside the filter element, a gas cylinder is arranged on the top of the filter element, a cleaning roller driven by a motor is arranged on the bottom surface, a piston rod is connected with the gas cylinder for cooperation and driving, the piston rod penetrates through the filter element downward and is connected with the filter screen, the filter screen covers the internal cross section of the filter element, a sealing plate is arranged at the bottom of the filter screen, a movable opening tightly combined with the sealing plate is arranged at the bottom of the filter element, and the position of the cleaning roller matches the position of the screen surface of the filter screen.

[0005] After the above structure is used, the flue gas passes through the filter element installed on the air inlet pipe to enter the desulfurization tower, and the larger impurities are attached to the filter screen in the filter element; after the desulfurization is completed, the air cylinder is started to drive the piston rod to extend downward, the filter screen is driven to pass through the movable port downward and move to the outside of the filter element, the motor is started to drive the cleaning roller to rotate, since the position of the cleaning roller matches the position of the screen surface of the filter screen, the part of the filter screen moving to the outside of the filter element is gradually brushed by the cleaning roller to brush off and clean the large impurities attached to the surface of the filter screen, the cleaning roller is installed on the bottom surface of the filter element, the sealing plate is tightly combined with the movable port to prevent the flue gas from leaking from the filter element, the cleaning roller is prevented from being eroded by the flue gas, and the filter screen covers the internal cross section of the filter element to prevent the flue gas from entering the desulfurization tower through the filter screen; the filter screen covers the internal cross section of the filter element to completely filter the flue gas, then the air cylinder cooperates with the piston rod to push the filter screen to extend downward from the movable port, and the cleaning roller installed on the outside of the filter element sweeps off the impurities on the screen surface, and the cleaning roller is isolated from the flue gas to prevent erosion.

[0006] As a further improvement of the utility model, the lower edge of the sealing plate is provided with a horizontally outward extending sealing edge, the outer side of the sealing edge is covered with a sealing pad layer, the surface of the sealing pad layer is covered with a corrosion resistant layer, and the lower edge of the movable port is provided with a splicing groove corresponding to the sealing edge.

[0007] After the above structure is used, the outer side of the sealing edge is covered with a sealing pad layer to fill the gap after the sealing plate is combined with the movable port, the sealing effect is improved, the sealing edge is clamped into the corresponding splicing groove in the movable port to complete the combination of the sealing plate and the movable port, and the fitting area of the sealing pad layer and the edge of the movable port is increased.

[0008] As a further improvement of the utility model, the bottom of the filter element is connected with a collecting box, the top of the collecting box is provided with a collecting port, and the collecting port is arranged below the cleaning roller.

[0009] After the above structure is used, the bottom of the filter element is connected with the collecting box, the collecting port at the top of the collecting box is aligned below the cleaning roller, the impurities brushed off by the cleaning roller directly fall into the collecting box, the impurities are conveniently collected and cleaned, and the impurities are prevented from being scattered around the desulfurization tower to cause secondary pollution.

[0010] As a further improvement of the utility model, the bottom of the collecting box is provided with an alkaline adsorption liquid.

[0011] After the above structure is used, the alkaline adsorption liquid is put into the bottom of the collecting box, the impurities brushed off fall into the collecting box and immerse in the adsorption liquid in the bottom, the impurities are prevented from being raised from the collecting box by external airflow, the acidic substances on the surface of the impurities are neutralized, and the impurities are prevented from causing secondary pollution. BRIEF DESCRIPTION OF DRAWINGS

[0012] Fig. 1 The utility model discloses a structure schematic diagram.

[0013] Fig. 2 The utility model discloses a filter piece cross section structure schematic diagram.

[0014] 1 - desulfurization tower, 2 - air inlet pipe, 3 - filter piece, 4 - filter screen, 5 - cylinder, 6 - cleaning roller, 7 - piston rod, 8 - sealing plate, 9 - movable mouth, 10 - sealing edge, 11 - splicing groove, 12 - collection box, 13 - collection mouth. DETAILED DESCRIPTION

[0015] As Figs. 1-2 A kind of garbage incineration flue gas desulfurization equipment shown, including desulfurization tower 1, the side of the desulfurization tower 1 is communicated with air inlet pipe 2, which is installed with filter piece 3 on the air inlet pipe 2, the inside of the filter piece 3 is equipped with filter screen 4, the top of the filter piece 3 is installed with cylinder 5, bottom surface is equipped with motor-driven cleaning roller 6, the cylinder 5 is connected with piston rod 7 and is driven in cooperation, the piston rod 7 penetrates through filter piece 3 downwards and is connected with filter screen 4, the filter screen 4 covers the inside cross section of filter piece 3, the bottom of the filter screen 4 is equipped with sealing plate 8, the bottom of the filter piece 3 is equipped with movable mouth 9 that is tightly spliced with sealing plate 8, the position of the cleaning roller 6 matches the mesh surface position of filter screen 4.

[0016] by making flue gas pass through air inlet pipe 2 into desulfurization tower 1, flue gas passes through filter piece 3 installed on air inlet pipe 2, wherein larger impurities are attached on filter screen 4 in filter piece 3;By starting cylinder 5 to drive piston rod 7 to extend downwards after desulfurization ends, filter screen 4 is driven to pass through movable mouth 9 downwards, moves to the outside of filter piece 3, then by starting motor-driven cleaning roller 6 to rotate, since the position of cleaning roller 6 matches the mesh surface position of filter screen 4, the part of filter screen 4 that moves to the outside of filter piece 3 is gradually brushed by cleaning roller 6, and the large impurities attached on the surface of filter screen 4 are brushed off for cleaning, by the installation of cleaning roller 6 on the bottom surface of filter piece 3, sealing plate 8 is tightly spliced with movable mouth 9 to prevent flue gas from leaking out of filter piece 3, avoid cleaning roller 6 from being eroded by flue gas, and filter screen 4 covers the inside cross section of filter piece 3, to avoid flue gas from passing over filter screen 4 into desulfurization tower 1;Realize that filter screen covers the inside cross section of filter piece 3, and flue gas is completely filtered, then cylinder 5 cooperates with piston rod 7 to push filter screen 4 to extend downwards from movable mouth 9, and the impurities on the mesh surface are swept off by cleaning roller 6 installed on the outside of filter piece 3, and cleaning roller 6 is isolated from flue gas to avoid being eroded.

[0017] The lower edge of the sealing plate 8 is provided with a horizontal outward extending sealing edge 10, the outer side of the sealing edge 10 is covered with a sealing pad layer, the surface of the sealing pad layer is covered with a corrosion resistant layer, the lower edge of the movable port 9 is provided with a splicing groove 11 corresponding to the sealing edge 10.

[0018] By covering the outer side of the sealing edge 10 with a sealing pad layer, the gap between the sealing plate 8 and the movable port 9 after splicing is filled, the sealing effect is improved, the splicing of the sealing plate 8 and the movable port 9 is completed by clamping the sealing edge 10 into the corresponding splicing groove 11 of the movable port 9, and the fitting area of the sealing pad layer and the edge of the movable port 9 is increased.

[0019] The bottom of the filter 3 is connected with a collection box 12, the top of the collection box 12 is provided with a collection port 13, and the collection port 13 is arranged below the cleaning roller 6.

[0020] The bottom of the filter 3 is connected with a collection box 12, the top of the collection box 12 is provided with a collection port 13, and the collection port 13 is arranged below the cleaning roller 6.

[0021] The bottom of the collection box 12 is provided with an alkaline adsorption liquid.

[0022] By putting the alkaline adsorption liquid into the bottom of the collection box 12, the brushed impurities fall into the collection box 12 and immerse into the bottom adsorption liquid, preventing the impurities from being blown up from the collection box 12 by external airflow, and neutralizing the acidic substances on the surface of the impurities, avoiding secondary pollution caused by the impurities.

Claims

1. A waste incineration flue gas desulfurization device, comprising a desulfurization tower (1), a side of the desulfurization tower (1) is communicated with an air inlet pipe (2), a filter element (3) is installed on the air inlet pipe (2), an inner part of the filter element (3) is provided with a filter screen (4), characterized in that: The top of the filter (3) is provided with a cylinder (5), the bottom is provided with a motor-driven cleaning roller (6), the cylinder (5) is connected with a piston rod (7) for cooperation driving, the piston rod (7) penetrates downward through the filter (3) and is connected with a filter screen (4), the filter screen (4) covers the internal cross section of the filter (3), the bottom of the filter screen (4) is provided with a sealing plate (8), the bottom of the filter (3) is provided with a movable port (9) which is tightly matched with the sealing plate (8), the position of the cleaning roller (6) is matched with the position of the screen surface of the filter screen (4).

2. The waste incineration flue gas desulfurization apparatus according to claim 1, characterized by: The lower edge of the sealing plate (8) is provided with a horizontally outward extending sealing edge (10), the outer side of the sealing edge (10) is covered with a sealing pad layer, the surface of the sealing pad layer is covered with a corrosion-resistant layer, the lower edge of the movable port (9) is provided with a splicing groove (11) corresponding to the sealing edge (10).

3. The waste incineration flue gas desulfurization apparatus according to claim 1, characterized by: The bottom of the filter (3) is connected with a collecting box (12), the top of the collecting box (12) is provided with a collecting port (13), the collecting port (13) is arranged below the cleaning roller (6) in interval.

4. The waste incineration flue gas desulfurization apparatus according to claim 3, characterized by: The bottom of the collecting box (12) is provided with an alkaline adsorption liquid.

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