Multi-stage filtering device of desulfurization and denitrification chimney

Abstract

The utility model provides a multistage filtering device of a desulfurization and denitrification chimney, which relates to the technical field of filtering devices, and comprises a desulfurization and denitrification tank, a dust removal mechanism is arranged on the desulfurization and denitrification tank, and the dust removal mechanism comprises a dust removal box and a filtering plate arranged in the dust removal box. According to the multi-stage filtering device of the desulfurization and denitrification chimney, through cooperation of an electric push rod and a connecting frame, a moving plate can be driven to move in a cleaning box, the moving plate drives a brush through a moving rod to clean large-particle impurities on a filtering plate, and air in the cleaning box is extruded in the moving process of the moving plate in the cleaning box; and then air sequentially passes through the through hole in the upper end of the vertical pipe, the vertical pipe and the transverse pipe and is finally sprayed out from the one-way spray head, fine dust particles attached to meshes of the filter plate are blown out through the sprayed air flow, the fine dust particles are prevented from being pressed into the meshes of the filter plate by the brush, and the cleaning effect of the filter plate is remarkably improved through the combined effect of air spraying and the brush. The cleaning efficiency is improved.

Description

Technical Field

[0001] The utility model relates to a filtering device, in particular to a multi-stage filtering device for a desulfurization and denitrification chimney, belonging to the technical field of filtering devices. Background Art

[0002] Multi-stage filtration systems for desulfurization and denitrification chimneys are specialized for industrial waste gas purification, removing harmful components such as sulfur dioxide and nitrogen oxides from the exhaust gas, achieving both gas purification and environmental protection. These systems typically utilize a multi-layered filtration structure. The first few layers of filters remove larger particulate matter and suspended solids, while subsequent desulfurization and denitrification units provide more in-depth treatment of the exhaust gas, achieving both environmental and health benefits.

[0003] In Chinese patent disclosure specification CN219764842U, a multi-stage filtration device for desulfurization and denitrification is disclosed. By adding a cleaning brush and its driving mechanism, impurities can be effectively prevented from clogging the filter screen and affecting the filtration effect without pausing the equipment. By designing the bottom plate of the multi-stage filter box to be detachable and the filter screen to be installed on the bottom plate by bolts, the filter screen is further made detachable, thereby facilitating the replacement of the filter screen and the cleaning of the interior of the filter box.

[0004] Although the above patent can clean the filter in time by using a cleaning brush to prevent impurities from clogging the filter, it is difficult to remove fine dust particles on the filter by only using a cleaning brush. Through actual application, it is found that, therefore, a multi-stage filtration device for desulfurization and denitrification chimneys is proposed. Utility Model Content

[0005] The utility model provides a multi-stage filtering device for a desulfurization and denitrification chimney, which significantly improves the cleaning effect of the filter screen and increases the cleaning efficiency through the combination of air jets and cleaning brushes.

[0006] The utility model is realized through the following technical scheme: a multi-stage filtering device for a desulfurization and denitrification chimney, comprising a desulfurization and denitrification tank, on which a dust removal mechanism is provided, comprising a dust removal box and a filter plate arranged in the dust removal box, and a cleaning mechanism is provided on the dust removal mechanism.

[0007] The cleaning mechanism includes a cleaning box fixed on the top surface of the dust collection box, an electric push rod fixed on the top surface of the dust collection box, a connecting frame fixed on the output end of the electric push rod, a movable plate slidably connected to the cleaning box fixed at the lower end of the connecting frame, a moving rod and a vertical pipe that pass through the cleaning box and the dust collection box are fixed on the bottom surface of the movable plate, the vertical pipe is connected to the cleaning box through a through hole opened at its upper end, a brush in contact with the filter plate is fixed at one end of the moving rod extending into the dust collection box, and a horizontal pipe is connected to one end of the vertical pipe extending into the dust collection box, and evenly distributed one-way nozzles are installed on the horizontal pipe, and an electromagnetic valve is installed on the cleaning box.

[0008] Specifically, a sealing gasket is fixed to the top surface of the movable plate, and the sealing gasket is in sliding contact with the inner wall of the cleaning box.

[0009] Specifically, the horizontal height of the one-way nozzle is higher than the height of the brush, and the brush is parallel to the horizontal pipe.

[0010] Furthermore, the right end of the dust removal box is connected to an air inlet pipe, and the left end of the dust removal box is connected to a connecting pipe.

[0011] Specifically, the desulfurization and denitrification tank includes a tank body connected to a dust removal box through a connecting pipe, the top of the tank body is connected to an exhaust fan, and the output end of the exhaust fan is connected to an exhaust pipe.

[0012] Furthermore, a sliding sealing ring A sleeved on the vertical pipe and a sliding sealing ring B sleeved on the moving rod are fixed to the inner bottom wall of the cleaning box.

[0013] The utility model provides a multi-stage filtering device for desulfurization and denitrification chimneys, which has the following beneficial effects:

[0014] 1. The multi-stage filtering device of the desulfurization and denitrification chimney can drive the movable plate to move in the cleaning box through the cooperation of the electric push rod and the connecting frame. The movable plate will drive the brush to clean the large particles of impurities on the filter plate through the moving rod. The movable plate will also squeeze the air inside the cleaning box during its movement, so that the air passes through the through hole at the upper end of the vertical pipe, the vertical pipe, and the horizontal pipe in turn, and is finally ejected from the one-way nozzle. The ejected airflow will blow out the fine dust particles attached to the mesh of the filter plate, preventing the fine dust particles from being pressed into the mesh of the filter plate by the brush. The combined effect of the air jet and the brush can significantly improve the cleaning effect of the filter plate and improve the cleaning efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the three-dimensional structure of the utility model;

[0016] Figure 2 This is a cross-sectional view of the internal structure of the dust removal box of the present invention;

[0017] Figure 3 For the utility model Figure 2 A schematic diagram of the structure at center A;

[0018] Figure 4 This is a cross-sectional view of the internal structure of the cleaning box and the dust removal box of the present invention;

[0019] Figure 5 For the utility model Figure 4 A magnified schematic diagram of the structure at point B in the middle;

[0020] Figure 6 For the utility model Figure 4 Enlarged schematic diagram of the structure at point C in the middle.

[0021] Description of Reference Numerals

[0022] 1. Desulfurization and denitrification tank; 101. Tank body; 102. Exhaust fan; 103. Exhaust pipe;

[0023] 2. Dust removal mechanism; 201. Dust removal box; 202. Air inlet pipe; 203. Connecting pipe; 204. Filter plate;

[0024] 3. Cleaning mechanism; 301. Cleaning box; 302. Electric push rod; 303. Connecting frame; 304. Moving plate; 305. Moving rod; 306. Brush; 307. Vertical pipe; 308. One-way nozzle; 309. Horizontal pipe; 310. Sealing gasket; 311. Solenoid valve; 312. Sliding sealing ring A; 313. Sliding sealing ring B. DETAILED DESCRIPTION

[0025] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0026] See also Figures 1 to 6 An embodiment of the utility model provides a multi-stage filtering device for a desulfurization and denitrification chimney, including a desulfurization and denitrification tank 1. The desulfurization and denitrification tank 1 includes a tank body 101 connected to a dust removal box 201 through a connecting pipe 203. The exhaust gas can be desulfurized and denitrified through the tank body 101. The top of the tank body 101 is connected to an exhaust fan 102. The filtered gas can be discharged through the working exhaust fan 102. The output end of the exhaust fan 102 is connected to an exhaust pipe 103.

[0027] Please refer to Figure 1 and Figure 2The desulfurization and denitrification tank 1 is provided with a dust removal mechanism 2, which includes a dust removal box 201 and a filter plate 204 arranged in the dust removal box 201. The dust particles in the exhaust gas can be pre-treated through the filter plate 204. The right end of the dust removal box 201 is connected with an air intake pipe 202, and the exhaust gas can be passed into the dust removal box 201 through the air intake pipe 202. The left end of the dust removal box 201 is connected with a connecting pipe 203. The exhaust gas after filtering the dust particles will be passed from the connecting pipe 203 into the tank body 101 for desulfurization and denitrification.

[0028] Please refer to Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 and Figure 6 The dust removal mechanism 2 is provided with a cleaning mechanism 3, which includes a cleaning box 301 fixed to the top surface of the dust removal box 201, and an electric push rod 302 is fixed to the top surface of the dust removal box 201, and a connecting frame 303 is fixed to the output end of the electric push rod 302. When the electric push rod 302 is started, it can drive the connecting frame 303 to move, and the lower end of the connecting frame 303 is fixed with a movable plate 304 that is slidably connected to the cleaning box 301. There is a good sealing between the connecting frame 303 and the movable plate 304. When the movable plate 304 moves from top to bottom in the cleaning box 301 driven by the connecting frame 303, the air inside the cleaning box 301 will be squeezed, and a sealing gasket 310 is fixed to the top surface of the movable plate 304, which is in sliding contact with the inner wall of the cleaning box 301.

[0029] The bottom surface of the movable plate 304 is fixed with a movable rod 305 and a vertical pipe 307 that pass through the cleaning box 301 and the dust removal box 201. The vertical pipe 307 is connected to the cleaning box 301 through a through hole opened at its upper end. The air squeezed by the movable plate 304 inside the cleaning box 301 will enter the vertical pipe 307 through the through hole. The end of the movable rod 305 extending into the dust removal box 201 is fixed with a brush 306 that contacts the filter plate 204. Driven by the movable rod 305, the brush 306 can clean the large particles of dust on the filter plate 204.

[0030] Please refer to Figure 3 and Figure 4 The vertical pipe 307 extends to one end of the dust removal box 201 and is connected to a horizontal pipe 309. The brush 306 is parallel to the horizontal pipe 309. The horizontal pipe 309 is equipped with evenly distributed one-way nozzles 308. The horizontal height of the one-way nozzles 308 is higher than the height of the brush 306, so that the large particles of dust on the filter plate 204 can be cleaned by the brush 306 first, and then the fine dust particles on the filter plate 204 can be blown off by the one-way nozzle 308.

[0031] The cleaning box 301 is equipped with a solenoid valve 311. When the movable plate 304 moves downward to its maximum stroke, the solenoid valve 311 opens, the cleaning box 301 is connected to the outside, and the electric push rod 302 drives the connecting frame 303 and the movable plate 304 to move upward. The cleaning box 301 is filled with air again, so that the one-way nozzle 308 can clean the filter plate 204 next time. At the same time, since the one-way nozzle 308 is one-way, the movable plate 304 and the connecting frame 303 are in the cleaning state. When the cleaning box 301 moves, the exhaust gas inside the dust removal box 201 will not enter the horizontal pipe 309 and the vertical pipe 307 from the one-way nozzle 308. The inner bottom wall of the cleaning box 301 is fixed with a sliding sealing ring A312 mounted on the vertical pipe 307 and a sliding sealing ring B313 mounted on the moving rod 305. The sliding sealing ring A312 and the sliding sealing ring B313 can achieve a good sealing effect. At the same time, the moving rod 305 and the vertical pipe 307 can slide freely up and down.

[0032] Working principle: When in use, the exhaust gas is first transported to the dust removal box 201 through the air inlet pipe 202, and the dust particles in the exhaust gas are pre-processed through the filter plate 204 to prevent the subsequent tank body 101 from being blocked by dust particles. In order to ensure the effect of filtering dust on the filter plate 204, the electric push rod 302 is started, and the electric push rod 302 will squeeze the moving plate 304 through the connecting frame 303, so that the moving plate 304 drives the moving rod 305 to descend, and then the moving rod 305 drives the brush 306 to clean the large particles of impurities on the filter plate 204. The movable plates 304 are sealed, so the movable plates 304 will squeeze the air inside the cleaning box 301 during the movement of the movable plates 304 in the cleaning box 301, so that the air passes through the through hole at the upper end of the vertical pipe 307, the vertical pipe 307, the horizontal pipe 309 in turn, and is finally ejected from the one-way nozzle 308. The ejected airflow blows out the fine dust particles attached to the mesh of the filter plate 204, preventing the fine dust particles from being pressed into the mesh of the filter plate 204 by the brush 306. The combined effect of the air jet and the brush 306 significantly improves the cleaning effect of the filter plate 204 and improves the cleaning efficiency.

[0033] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in this invention is defined by the appended claims and their equivalents.

Claims

1. A multi-stage filtering device for a desulfurization and denitrification chimney, comprising a desulfurization and denitrification tank (1), wherein the desulfurization and denitrification tank (1) is provided with a dust removal mechanism (2), wherein the dust removal mechanism (2) comprises a dust removal box (201) and a filter plate (204) arranged in the dust removal box (201), characterized in that: The dust removal mechanism (2) is provided with a cleaning mechanism (3); The cleaning mechanism (3) comprises a cleaning box (301) fixed on the top surface of the dust removal box (201), an electric push rod (302) fixed on the top surface of the dust removal box (201), a connecting frame (303) fixed to the output end of the electric push rod (302), and a movable plate (304) slidably connected to the cleaning box (301) fixed to the lower end of the connecting frame (303); A moving rod (305) and a vertical pipe (307) that pass through the cleaning box (301) and the dust removal box (201) are fixed to the bottom surface of the moving plate (304); the vertical pipe (307) is connected to the cleaning box (301) via a through hole opened at its upper end; a brush (306) that contacts the filter plate (204) is fixed to one end of the moving rod (305) that extends into the dust removal box (201); a horizontal pipe (309) is connected to one end of the vertical pipe (307) that extends into the dust removal box (201); and uniformly distributed one-way nozzles (308) are installed on the horizontal pipe (309). A solenoid valve (311) is installed on the cleaning box (301).

2. The multi-stage filtration device for a desulfurization and denitrification chimney according to claim 1, characterized in that: A sealing gasket (310) is fixed to the top surface of the movable plate (304), and the sealing gasket (310) is in sliding contact with the inner wall of the cleaning box (301).

3. The multi-stage filtration device for a desulfurization and denitrification chimney according to claim 1, characterized in that: The horizontal height of the one-way nozzle (308) is higher than the height of the brush (306), and the brush (306) is parallel to the horizontal pipe (309).

4. The multi-stage filtration device for a desulfurization and denitrification chimney according to claim 1, characterized in that: The right end of the dust removal box (201) is connected to an air inlet pipe (202), and the left end of the dust removal box (201) is connected to a connecting pipe (203).

5. The multi-stage filtering device for a desulfurization and denitrification chimney according to claim 1, characterized in that: The desulfurization and denitrification tank (1) comprises a tank body (101) connected to a dust removal box (201) via a connecting pipe (203); the top of the tank body (101) is connected to an exhaust fan (102); and the output end of the exhaust fan (102) is connected to an exhaust pipe (103).

6. The multi-stage filtering device for a desulfurization and denitrification chimney according to claim 1, characterized in that: The inner bottom wall of the cleaning box (301) is fixed with a sliding sealing ring A (312) sleeved on the vertical pipe (307) and a sliding sealing ring B (313) sleeved on the moving rod (305).

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