Biomass power plant boiler flue gas multi-stage efficient purification and emission device

Abstract

The biomass power plant boiler flue gas multi-stage efficient purification and emission device comprises a treatment box, and the two sides of the treatment box communicate with a gas inlet pipe and a gas outlet pipe correspondingly; according to the scheme, denitration liquid is conveyed into the liquid storage tank through the liquid inlet formed in the top of the liquid storage tank, then conveyed into the spraying pipe and sprayed to one mesh plate through the spraying head, so that a mucous membrane is formed on the surface of the mesh plate, flue gas can be subjected to denitration treatment through the mesh plate, and then under the movement of the swing assembly, the linkage assembly is matched with the movement of the linkage assembly; when the two mesh plates are continuously shaken off and sprayed, the spraying pipe and the rotating shaft can be driven to rotate at the same time, the spraying pipe drives the spraying head to swing to face the other mesh plate and spray denitration liquid to the other mesh plate, and the rotating shaft drives the cam to rotate to the previous mesh plate and flaps and shakes off mucous membranes on the mesh plate, so that the two mesh plates are continuously shaken off and sprayed. And a new mucosa is continuously formed, so that the flue gas can be conveniently and continuously denitrated and purified, and the purification effect of the flue gas is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of biomass power plants, and particularly relates to a multi-stage efficient purification and discharge device for flue gas of a biomass power plant boiler. BACKGROUND

[0002] The biomass boiler is a boiler using biomass energy such as crop straw (corn straw, sorghum straw, wheat straw, rice straw, bean straw and cotton stalk) and agricultural processing waste (rice husk) as fuel. The biomass energy has the characteristics of renewability, low pollution, wide distribution and abundant total amount, and the content of sulfur dioxide and nitrogen oxides in the flue gas discharged by the biomass boiler is low.

[0003] In the related art, the flue dust removal method of the biomass combustion application equipment mostly adopts the traditional cyclone dust collector or water curtain dust collector or bag type dust collector, and occasionally uses the electrostatic dust removal system, but the electrostatic dust removal method has high investment and cost, and many small and medium-sized enterprises cannot accept it; the cyclone dust collector or water curtain dust collector cannot achieve the standard discharge of flue dust; the bag type dust collector completely removes the dust, but the bag is easily brittle and cracked or even directly burned due to the influence of high temperature and even sparks caused by unburned carbon particles in the use process, has a short service life, the bag needs to be replaced frequently, the use cost is greatly increased, the clean production is seriously affected, and the labor intensity of workers is also increased. Therefore, the technical personnel in the field provides a multi-stage efficient purification and discharge device for flue gas of a biomass power plant boiler to solve the problems in the background art. CONTENT OF THE UTILITY MODEL

[0004] In order to solve the problems in the background art, the present application provides a multi-stage efficient purification and discharge device for flue gas of a biomass power plant boiler.

[0005] The multi-stage efficient purification and discharge device for flue gas of a biomass power plant boiler provided by the present application adopts the following technical scheme:

[0006] A multi-stage efficient purification and discharge device for flue gas of a biomass power plant boiler, comprising a treatment box, an air inlet pipe and an air outlet pipe are communicated with the two sides of the treatment box respectively, two mesh plates are fixed on the side of the treatment box close to the air outlet pipe;

[0007] A spray pipe and a rotating shaft are rotationally arranged in the treatment box, and the spray pipe and the rotating shaft are located between the two mesh plates, a plurality of spray heads are communicated with the bottom end of the spray pipe, a cam abutting against the mesh plate is sleeved on the outer wall of the rotating shaft, and a liquid storage tank is fixed at the top end of the treatment box and communicated with the spray pipe;

[0008] A linkage assembly is arranged between the spray pipe and the rotating shaft and is used for driving the linkage of the spray pipe and the rotating shaft.

[0009] A swing assembly is arranged on one side of the treatment box, and is connected with the spray pipe to drive the swing of the spray pipe.

[0010] By spraying the denitration liquid on the surface of the mesh plate, the denitration liquid forms a mucous membrane in the mesh of the mesh plate, so that the flue gas can be fully purified when passing through the mucous membrane in the mesh, facilitating the full treatment of the flue gas and improving the treatment effect of the flue gas.

[0011] Preferably, the linkage assembly comprises a first pulley sleeved on the outer wall of the spray pipe, and the outer wall of the rotating shaft is sleeved with a second pulley, and the first pulley and the second pulley are connected by a belt transmission.

[0012] By adopting the above technical scheme, the linkage of the spray pipe and the rotating shaft is facilitated by the cooperation of the linkage assembly.

[0013] Preferably, the swing assembly comprises a driving motor fixedly arranged at the top end of the treatment box, the output shaft of the driving motor is fixed with a rotating rod, one end of the rotating rod is fixed with a swing rod, one end of the spray pipe is fixed with a swing plate, and one side of the swing plate is provided with a swing groove for sliding the swing rod.

[0014] By adopting the above technical scheme, the continuous swing of the spray pipe is facilitated by the cooperation of the swing assembly.

[0015] Preferably, a fixed frame is fixed on one side of the treatment box close to the air inlet pipe, a rubber ring is fixed on one side of the fixed frame, a through slot is formed at the top end of the treatment box, a filter screen is connected with the rubber ring in the through slot, a sealing assembly is arranged at the top end of the treatment box to cover the through slot, and a pushing assembly is arranged in the treatment box to fix the filter screen.

[0016] By adopting the above technical scheme, the filter screen is facilitated to be disassembled and replaced by the cooperation of the pushing assembly and the sealing assembly, and the replacement efficiency of the filter screen is improved.

[0017] Preferably, the sealing assembly comprises a cover plate slidably arranged at the top end of the through slot, a first sliding block is fixed at the bottom end of the cover plate, a first sliding groove is formed at the top end of the treatment box for sliding the first sliding block, and the first sliding groove is fixedly connected with the first sliding block through a first spring.

[0018] By adopting the above technical scheme, the treatment box is facilitated to be sealed by the cooperation of the sealing assembly.

[0019] Preferably, the pushing assembly comprises a moving frame arranged in the treatment box and abutting against the filter screen, two push rods are fixed at two ends of one side of the moving frame, two second sliding blocks are fixed at one end of each of the two push rods, and two second sliding grooves are formed in the inner wall of the treatment box and used for sliding the second sliding blocks, and the second sliding blocks are fixedly connected with the second sliding grooves through second springs.

[0020] By adopting the above technical scheme, the filter screen and the rubber ring are closely attached by the cooperation of the pushing assembly, so that the gap between the filter screen and the rubber ring is avoided.

[0021] In summary, the present application has the following beneficial technical effects:

[0022] 1. The biomass power plant boiler flue gas multi-stage efficient purification and discharge device, the denitration liquid is delivered into the liquid storage tank through the liquid inlet arranged at the top of the liquid storage tank, and then delivered into the spray pipe, and then sprayed onto one of the mesh plates through the spray head to form a mucous membrane on the surface, so that the mesh plate can be used for denitration treatment of the flue gas, and then the spray pipe and the rotating shaft can be driven to rotate simultaneously under the movement of the swing assembly and the movement of the linkage assembly, the spray pipe drives the spray head to swing to face the other mesh plate to spray the denitration liquid thereon, and the rotating shaft drives the cam to rotate to the previous mesh plate to beat and shake off the mucous membrane on the mesh plate, so that new mucous membranes are continuously formed in the process of beating and spraying of the two mesh plates, thereby facilitating continuous denitration and purification treatment of the flue gas and improving the purification effect of the flue gas.

[0023] 2. The biomass power plant boiler flue gas multi-stage efficient purification and discharge device, when the filter screen needs to be replaced, the sealing assembly is opened, and then the handle at the top of the filter screen is pulled to pull the original filter screen out of the slot upward, and then a new filter screen is placed into the treatment box from the slot downward, and then the movement of the filter screen is driven under the movement of the pushing assembly to make the filter screen close to the rubber ring, and since the fixed frame is in a fixed state, the filter screen and the fixed frame are tightly connected together under the extrusion of the filter screen and the fixed frame on the rubber ring, so that the gap is avoided, thereby facilitating the replacement of the filter screen and improving the replacement efficiency of the filter screen. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 is a whole cross-sectional structure schematic view of a biomass power plant boiler flue gas multi-stage efficient purification and discharge device in the embodiment of the present application;

[0025] Figure 2 is a treatment box plane structure schematic view of a biomass power plant boiler flue gas multi-stage efficient purification and discharge device in the embodiment of the present application;

[0026] Figure 3 is a linkage assembly structure schematic view of a biomass power plant boiler flue gas multi-stage efficient purification and discharge device in the embodiment of the present application;

[0027] Figure 4 is a fixed frame structure schematic diagram of a biomass power plant boiler flue gas multi-stage efficient purification and emission device in the embodiment of the application.

[0028] The label is explained: 1, processing box; 2, inlet pipe; 3, outlet pipe; 4, mesh plate; 5, spray pipe; 6, shaft; 7, spray head; 8, cam; 9, liquid storage tank; 10, linkage assembly; 101, first pulley; 102, second pulley; 103, belt; 11, swing assembly; 111, drive motor; 112, rotating rod; 113, swing rod; 114, swing plate; 115, swing groove; 12, fixed frame; 13, rubber ring; 14, slot; 15, filter screen; 16, sealing assembly; 161, cover plate; 162, first slider; 163, first sliding groove; 164, first spring; 17, push assembly; 171, moving frame; 172, push rod; 173, second slider; 174, second sliding groove; 175, second spring. DETAILED DESCRIPTION

[0029] The following will be combined with the Figures 1-4 The application is further described in detail.

[0030] The embodiment of the application discloses a biomass power plant boiler flue gas multi-stage efficient purification and emission device. Referring to Figures 1-4 A biomass power plant boiler flue gas multi-stage efficient purification and emission device, comprising a processing box 1, the processing box 1 is communicated with an inlet pipe 2 and an outlet pipe 3 on both sides, respectively, two mesh plates 4 are fixed on one side of the processing box 1 close to the outlet pipe 3;

[0031] A spray pipe 5 and a shaft 6 are rotationally arranged in the processing box 1, and the spray pipe 5 and the shaft 6 are located between the two mesh plates 4, the bottom end of the spray pipe 5 is communicated with a plurality of spray heads 7, the outer wall of the shaft 6 is sleeved with a cam 8 abutting against the mesh plate 4, and the top end of the processing box 1 is fixed with a liquid storage tank 9 communicated with the spray pipe 5;

[0032] A linkage assembly 10 is arranged between the spray pipe 5 and the shaft 6, and is used for driving linkage of the spray pipe 5 and the shaft 6;

[0033] A swing assembly 11 is arranged on one side of the processing box 1, the swing assembly 11 is connected with the spray pipe 5, and is used for driving swing of the spray pipe 5.

[0034] In the embodiment, the denitration liquid is delivered into the liquid storage tank 9 through the liquid inlet arranged on the top of the liquid storage tank 9, and then delivered into the spray pipe 5, and then sprayed onto one of the mesh plates 4 through the spray head 7 to form a sticky film on the surface of the mesh plate 4, so that the flue gas can be treated by denitration through the mesh plate 4, and then under the movement of the swing assembly 11 and in cooperation with the movement of the linkage assembly 10, the spray pipe 5 and the rotating shaft 6 can be simultaneously rotated, the spray pipe 5 drives the swing of the spray head 7 to face the other mesh plate 4 to spray the denitration liquid thereon, and the rotating shaft 6 drives the rotation of the cam 8 to hit and shake off the sticky film on the previous mesh plate 4. In this way, in the process of continuous shaking and spraying of the two mesh plates 4, new sticky films are continuously formed on the surfaces of the two mesh plates 4, so that the flue gas can be continuously treated by denitration and purification, and the purification effect of the flue gas is improved.

[0035] In a further embodiment, as shown in Figures 2-3 the linkage assembly 10 includes a first pulley 101 sleeved on the outer wall of the spray pipe 5, the rotating shaft 6 has a second pulley 102 sleeved on the outer wall thereof, the first pulley 101 and the second pulley 102 are drivingly connected through a belt 103, and the swing assembly 11 includes a driving motor 111 fixedly arranged on the top end of the treatment tank 1, the output shaft of the driving motor 111 is fixed with a rotating rod 112, one end of the rotating rod 112 is fixed with a swing rod 113, one end of the spray pipe 5 is fixed with a swing plate 114, and the swing plate 114 is provided with a swing groove 115 on one side thereof for sliding of the swing rod 113.

[0036] In the embodiment, when the denitration liquid is sprayed, first, under the movement of the driving motor 111, the rotating rod 112 is driven to rotate, the rotating rod 112 drives the swing rod 113 to slide in the swing groove 115, thereby driving the swing of the swing plate 114, the swing plate 114 drives the rotation of the spray pipe 5, and the spray pipe 5 drives the swing of the spray head 7. When the spray head 7 faces the left mesh plate 4, the denitration liquid can be sprayed onto the surface of the left mesh plate 4 to form a sticky film. When the spray head 7 swings to face the right mesh plate 4, the first pulley 101 is driven to rotate by the spray pipe 5, the first pulley 101 drives the rotation of the second pulley 102 through the belt 103, and the second pulley 102 drives the rotation of the cam 8, so that the cam 8 moves towards the left mesh plate 4 and shakes off the sticky film on the surface of the left mesh plate 4 under the impact of the cam 8. In this way, under the continuous swing, the spray head 7 and the cam 8 are continuously swung in opposite directions, so that new sticky films are continuously formed on the surfaces of the two mesh plates 4, thereby facilitating the continuous treatment of the flue gas by denitration and purification, and improving the purification effect of the flue gas.

[0037] In a further embodiment, as shown in Figure 1As shown, the fixed frame 12 is fixed on one side of the processing box 1 close to the air inlet pipe 2, one side of the fixed frame 12 is fixed with a rubber ring 13, the top end of the processing box 1 is provided with a through slot 14, the through slot 14 is connected with a filter screen 15 abutting against the rubber ring 13, the top end of the processing box 1 is provided with a sealing assembly 16 shielding the through slot 14, and the processing box 1 is provided with a pushing assembly 17 fixing the filter screen 15.

[0038] In this embodiment, after the flue gas is discharged into the processing box 1, the smoke dust in the flue gas is filtered and purified by the filter screen 15, when the filter screen 15 needs to be replaced, the sealing assembly 16 is opened, then the handle at the top of the filter screen 15 is pulled, the original filter screen 15 can be pulled out upward from the through slot 14, then the new filter screen 15 is put into the processing box 1 downward from the through slot 14, then the movement of the pushing assembly 17 drives the movement of the filter screen 15, so that the filter screen 15 approaches the rubber ring 13, and because the fixed frame 12 is in a fixed state, the filter screen 15 and the fixed frame 12 are tightly connected together under the extrusion of the filter screen 15 and the fixed frame 12 to the rubber ring 13, so that the gap is avoided, thereby facilitating the replacement of the filter screen 15 and improving the replacement efficiency of the filter screen 15.

[0039] In further embodiments, as shown in Figure 2 The sealing assembly 16 includes a cover plate 161 slidably arranged at the top end of the through slot 14, the bottom end of the cover plate 161 is fixed with a first sliding block 162, the top end of the processing box 1 is provided with a first sliding groove 163 for the sliding of the first sliding block 162, and the first sliding groove 163 is fixedly connected with the first sliding block 162 through a first spring 164.

[0040] In this embodiment, after the new filter screen 15 is put into the processing box 1, the first spring 164 drives the movement of the first sliding block 162, the first sliding block 162 drives the movement of the cover plate 161, so that the cover plate 161 closes the through slot 14, thereby closing the processing box 1 to avoid the leakage of flue gas.

[0041] In further embodiments, as shown in Figure 2 and Figure 4 The pushing assembly 17 includes a moving frame 171 arranged in the processing box 1 abutting against the filter screen 15, two push rods 172 are fixed at both ends of one side of the moving frame 171, one end of each of the two push rods 172 is fixed with a second sliding block 173, and both sides of the inner wall of the processing box 1 are provided with a second sliding groove 174 for the sliding of the second sliding block 173, and the two second sliding grooves 174 are fixedly connected with the second sliding block 173 through a second spring 175.

[0042] When the filter screen 15 is placed in the treatment box 1, under the elastic action of the second spring 175, the second sliding block 173 is driven to move, the push rod 172 is driven to move by the second sliding block 173, the moving frame 171 is driven to move by the push rod 172, the moving frame 171 extrudes the filter screen 15 during movement, so that the filter screen 15 is close to the rubber ring 13, and the filter screen 15 and the fixed frame 12 are tightly connected together under the cooperation of the rubber ring 13, so that the gap during replacement of the filter screen 15 is avoided, the replacement of the filter screen 15 is facilitated, and the replacement efficiency of the filter screen 15 is improved.

[0043] The implementation principle of the biomass power plant boiler flue gas multi-stage efficient purification and discharge device is as follows: first, the flue gas is discharged from the inlet pipe 2 into the treatment box 1, so that the flue gas is filtered by the filter screen 15 first, then the flue gas is conveyed to the mesh plate 4, and then under the movement of the driving motor 111, the rotating rod 112 is driven to rotate, the swing rod 113 is driven to slide in the swing groove 115, so that the swing plate 114 is swung, the spray pipe 5 is driven to rotate by the swing plate 114, and the spray head 7 is swung by the spray pipe 5. When the spray head 7 faces the left mesh plate 4, the spray head 7 sprays the denitration liquid to the surface of the left mesh plate 4 to form a mucous membrane. When the spray head 7 swings towards the right mesh plate 4, the first pulley 101 is driven to rotate by the spray pipe 5, the second pulley 102 is driven to rotate by the first pulley 101 through the belt 103, the cam 8 is driven to rotate by the second pulley 102, and the cam 8 moves towards the left mesh plate 4. Under the impact of the cam 8, the mucous membrane on the surface of the left mesh plate 4 is shaken off. In this way, under the continuous swinging, the spray head 7 and the cam 8 are continuously swung in the opposite direction, so that new mucous membranes are continuously formed on the surfaces of the two mesh plates 4, thereby facilitating continuous denitration purification treatment of the flue gas and improving the purification effect of the flue gas. When the filter screen 15 needs to be replaced, the original filter screen 15 is pulled out upward from the slot 14, and then a new filter screen 15 is placed in the treatment box 1 downward from the slot 14. Under the elastic action of the second spring 175, the second sliding block 173 is driven to move, the push rod 172 is driven to move by the second sliding block 173, the moving frame 171 is driven to move by the push rod 172, the moving frame 171 extrudes the filter screen 15 during movement, so that the filter screen 15 is close to the rubber ring 13, and the filter screen 15 and the fixed frame 12 are tightly connected together under the cooperation of the rubber ring 13, so that the gap during replacement of the filter screen 15 is avoided, the replacement of the filter screen 15 is facilitated, and the replacement efficiency of the filter screen 15 is improved.

[0044] The above are preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. Therefore, any equivalent changes made on the basis of the structure, shape and principle of the present application shall be covered within the protection scope of the present application.

Claims

1. A multi-stage high-efficiency purification and emission device for biomass power plant boiler flue gas, comprising a treatment box (1), characterized in that: Two sides of the processing box (1) are communicated with an air inlet pipe (2) and an air outlet pipe (3) respectively, two mesh plates (4) are fixed on one side of the processing box (1) close to the air outlet pipe (3); A spray pipe (5) and a rotating shaft (6) are rotatably arranged in the processing box (1), and the spray pipe (5) and the rotating shaft (6) are located between the two mesh plates (4), a plurality of spray heads (7) are communicated with the bottom end of the spray pipe (5), a cam (8) abutting against the mesh plate (4) is sleeved on the outer wall of the rotating shaft (6), and a liquid storage tank (9) communicated with the spray pipe (5) is fixed on the top end of the processing box (1); A linkage assembly (10) is arranged between the spray pipe (5) and the rotating shaft (6) and is used for driving linkage of the spray pipe (5) and the rotating shaft (6); A swing assembly (11) is arranged on one side of the processing box (1), the swing assembly (11) is connected with the spray pipe (5) and is used for driving swing of the spray pipe (5).

2. The multi-stage high-efficiency flue gas purification and emission device for a biomass power plant boiler according to claim 1, characterized in that: The linkage assembly (10) comprises a first pulley (101) sleeved on the outer wall of the spray pipe (5), a second pulley (102) sleeved on the outer wall of the rotating shaft (6), and the first pulley (101) and the second pulley (102) are drivingly connected through a belt (103).

3. The multi-stage high-efficiency flue gas purification and emission device for a biomass power plant boiler according to claim 2, characterized in that: The swing assembly (11) comprises a driving motor (111) fixedly arranged on the top end of the processing box (1), a rotating rod (112) fixed on the output shaft of the driving motor (111), a swing rod (113) fixed on one end of the rotating rod (112), a swing plate (114) fixed on one end of the spray pipe (5), and a swing groove (115) for sliding of the swing rod (113) formed in one side of the swing plate (114).

4. The multi-stage high-efficiency flue gas purification and emission device for a biomass power plant boiler according to claim 1, characterized in that: A fixed frame (12) is fixed on one side of the processing box (1) close to the air inlet pipe (2), a rubber ring (13) is fixed on one side of the fixed frame (12), a through slot (14) is formed in the top end of the processing box (1), a filter screen (15) abutting against the rubber ring (13) is connected in the through slot (14), a sealing assembly (16) shielding the through slot (14) is arranged on the top end of the processing box (1), and a pushing assembly (17) fixing the filter screen (15) is arranged in the processing box (1).

5. The multi-stage high-efficiency flue gas purification and emission device for a biomass power plant boiler according to claim 4, characterized in that: The sealing assembly (16) comprises a cover plate (161) slidably arranged on the top end of the through slot (14), a first sliding block (162) fixed on the bottom end of the cover plate (161), a first sliding groove (163) for sliding of the first sliding block (162) is formed in the top end of the processing box (1), and the first sliding groove (163) is fixedly connected with the first sliding block (162) through a first spring (164).

6. The multi-stage high-efficiency flue gas purification and emission device for a biomass power plant boiler according to claim 5, characterized in that: The pushing assembly (17) comprises a moving frame (171) arranged in the processing box (1) and abutting against the filter screen (15), both ends of one side of the moving frame (171) are fixedly provided with push rods (172), one end of each of the two push rods (172) is fixedly provided with a second sliding block (173), both sides of the inner wall of the processing box (1) are provided with second sliding grooves (174) for sliding of the second sliding block (173), and the two second sliding grooves (174) are fixedly connected with the second sliding block (173) through second springs (175).

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