A wet reciprocating filter dust removal device

Abstract

The present invention discloses a wet reciprocating filter dust removal device, which belongs to the technical field of metal mine dust control, and is used to solve at least one problem in the existing dust removal technology that it is difficult to deeply remove coal mine dust, the equipment is large in size, the water consumption is high, and the maintenance cost is high. In the device, the spray direction of the front atomizing nozzle is perpendicular to the dust airflow direction, and the spray direction of the middle atomizing nozzle is along the dust airflow direction; the reciprocating filter is provided with a connecting shaft, and the connecting shaft is provided with a through hole along the axial direction, one end of the connecting shaft is inserted into the through hole, and the connecting shaft and the hole wall of the through hole have a gap in the vertical direction, and the cross-sectional shape of the slide rail parallel to the movement direction of the reciprocating filter is a triangle, and the reciprocating filter moves from the lowest point of the slide rail to the highest point of the slide rail and continues to move forward, then falls in the vertical direction and generates vibration, and the slide rail rotates 180° at the same time. The present invention can be used to control coal mine dust.

Description

Technical Field

[0001] The invention belongs to the technical field of controlling dust in metal mines, and in particular relates to a wet reciprocating filter screen dust removal device. Background Art

[0002] The methods for controlling mine dust are mainly divided into mechanical dust removal, electrostatic dust removal and wet dust removal.

[0003] Among them, mechanical dust removal mainly relies on mechanical forces such as gravity, inertia, and centrifugal force to remove dust particles from the airflow. It has a simple structure, low energy consumption, and is not easy to damage. However, it cannot achieve high-efficiency and deep dust removal. It is suitable for handling dust-containing airflows with high dust concentrations and large particle diameters or completing rough dust removal at the front end of the dust removal device; electrostatic precipitator is a dust control technology that uses a high-voltage electric field to charge particles and then migrate and deposit on the dust collecting electrode. It can handle corrosive flue gas and remove dust with extremely small particle sizes with low pressure loss. However, the construction and maintenance costs of electrostatic precipitator technology are high, and its scope of application is narrow. It is not very suitable for the control of dust in metal mines; wet dust removal uses liquid (usually water) to come into close contact with dust, and uses the inertial collision and combination between droplets and dust particles to remove dust particles from the wind flow. It has the advantages of simple operation, low cost, and high dust reduction efficiency. However, traditional wet dust removal application technology generally has problems such as large droplet size, high water consumption, and low dust settling efficiency. Summary of the invention

[0004] In view of the above analysis, the present invention aims to provide a wet reciprocating filter dust removal device to solve at least one problem in the existing dust removal technology that it is difficult to deeply remove coal mine dust, the equipment is large in size, the water consumption is high, and the maintenance cost is high.

[0005] The purpose of the present invention is mainly achieved through the following technical solutions.

[0006] The present invention provides a wet reciprocating filter screen dust removal device, comprising a front atomizing nozzle, an intermediate atomizing nozzle, a reciprocating filter screen, a demister, an induced draft fan, a crank-connecting rod type reciprocating mechanical unit, a connecting rod and a slide rail, which are arranged in sequence along the dust airflow direction; the spray direction of the front atomizing nozzle is perpendicular to the dust airflow direction, the spray direction of the intermediate atomizing nozzle is along the dust airflow direction and toward the reciprocating filter screen, the reciprocating filter screen reciprocates along the dust airflow direction, the reciprocating filter screen is connected to the crank-connecting rod type reciprocating mechanical unit through a connecting rod, and the reciprocating filter screen is driven to reciprocate by the crank-connecting rod type reciprocating mechanical unit; the reciprocating filter screen It is placed on the slide rail and can slide relative to the slide rail; the cross-sectional shape of the slide rail parallel to the movement direction of the reciprocating filter is a triangle, the slide rail is arranged on the bottom surface of the shell and can rotate around the mid-vertical line of the bottom edge in the horizontal direction, the reciprocating filter moves from the lowest point of the slide rail to the highest point of the slide rail and continues to move forward, then falls in the vertical direction and vibrates, and the slide rail rotates 180° in the horizontal direction while vibrating; a connecting shaft is axially provided at the center of the reciprocating filter, a through hole is opened in the axial direction of the connecting shaft, one end of the connecting rod is inserted into the through hole, and the connecting rod and the hole wall of the through hole have a gap in the vertical direction, which is used to adapt to the displacement of the reciprocating filter in the vertical direction.

[0007] Furthermore, it also includes a liquid pump and a liquid supply pipeline, and the front atomizing nozzle and the middle atomizing nozzle are respectively connected to the liquid pump through the liquid supply pipeline.

[0008] Furthermore, the liquid supply pipeline includes a main pipeline, a first branch pipeline and a second branch pipeline. The front atomizing nozzle is connected to the main pipeline through the first branch pipeline, and the middle atomizing nozzle is connected to the main pipeline through the second branch pipeline.

[0009] Furthermore, the first branch line includes a first tube body and a second tube body connected in sequence along a path gradually away from the main tube; the second tube body is connected to a nozzle cover of the front atomizing nozzle, and a plurality of spray holes are provided on the nozzle cover.

[0010] Furthermore, the wet reciprocating filter dust removal device also includes a nozzle unblocking assembly, and the nozzle conveying assembly includes an inner tube brush; the second tube body is sleeved on the outer wall of the first tube body and is slidably and sealedly connected to the first tube body, the first tube body is located outside the outer shell, and the second tube body is provided with a flange at one end close to the first tube body, the second tube body is located inside the outer shell, and the flange is located outside the outer shell; the brush rod end of the inner tube brush is fixedly connected to the first tube body, the bristle end of the inner tube brush protrudes into the second tube body, and the bristles of the inner tube brush are in contact with the inner wall of the second tube body.

[0011] Furthermore, the nozzle unclogging assembly also includes an external tube brush, a driving rack, a driving gear and an L-shaped mounting rod. The driving rack is arranged on the outer wall of the second tube body, the driving gear is vertically meshed with the driving rack, one end of the L-shaped mounting rod is fixedly connected to the driving gear, and the other end of the L-shaped mounting rod is fixedly connected to the brush rod end of the external tube brush. The other end of the external tube brush is located below the nozzle cover and the brush is in contact with the nozzle cover. When the second tube body reciprocates up and down, the brush is driven to swing back and forth relative to the nozzle cover to brush the nozzle cover.

[0012] Furthermore, the axis of the first branch and the axis of the second branch are both perpendicular to the axis of the main branch.

[0013] Furthermore, it also includes an outer shell, and the liquid outlet of the front atomizing nozzle, the liquid outlet of the middle atomizing nozzle, the reciprocating filter and the demister are all located in the outer shell.

[0014] Furthermore, it also includes a sewage pipe, a sewage outlet is arranged at the bottom of the shell, and the sewage pipe is connected with the sewage outlet.

[0015] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects.

[0016] A) The wet reciprocating filter dust removal device provided by the present invention is used for controlling coal mine dust. It combines spray dust removal technology with reciprocating filter dust removal technology. While achieving high-efficiency and high-precision removal of dust particles, it can avoid clogging of the reciprocating filter and reduce the wind resistance of the dust removal device. It has the advantages of low energy consumption, simple operation, low operating cost, etc., and has positive promotion significance and significant application value.

[0017] B) The wet reciprocating filter dust removal device provided by the present invention, on the one hand, can perform three dust removal on the dust airflow by arranging a front atomizing nozzle, an intermediate atomizing nozzle and a reciprocating filter, thereby being able to effectively remove dust particles in the dust airflow; on the other hand, the intermediate atomizing nozzle and the reciprocating filter can form a small fine dust removal system, and the droplets sprayed by the intermediate atomizing nozzle not only contact the dust particles in the dust airflow, but also form a liquid film on the reciprocating filter after contacting the reciprocating filter, and the dust particles are intercepted by the liquid film, and the fine dust particles are further settled and removed; on the other hand, the reciprocating motion of the reciprocating filter can promote the timely sedimentation of the liquid film and form a new liquid film, thereby preventing the reciprocating filter from being blocked, and improving the dust removal efficiency and effect.

[0018] In the present invention, the above-mentioned technical solutions can also be combined with each other to achieve more preferred combination solutions. Other features and advantages of the present invention will be described in the subsequent description, and some advantages can become obvious from the description, or can be understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained through the contents particularly pointed out in the embodiments of the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are only used for the purpose of illustrating specific embodiments and are not to be considered as limiting the present invention. In the entire drawings, the same reference symbols represent the same components;

[0020] Figure 1 A schematic structural diagram of a wet reciprocating filter dust removal device provided in Embodiment 1 of the present invention;

[0021] Figure 2 A schematic diagram of the movement process of the reciprocating filter screen and the slide rail in the wet reciprocating filter screen dust removal device provided in the first embodiment of the present invention;

[0022] Figure 3 This is a schematic structural diagram of the liquid supply pipeline and nozzle dredging assembly in the wet reciprocating filter dust removal device provided in Example 1 of the present invention.

[0023] Reference numerals:

[0024] 1-front atomizing nozzle; 2-middle atomizing nozzle; 3-reciprocating filter; 4-demister; 5-induced draft fan; 6-housing; 7-drain pipe; 8-crank-connecting rod reciprocating mechanical unit; 9-connecting rod; 10-slide rail; 11-liquid pump; 12-main line; 13-first branch; 131-first pipe body; 132-second pipe body; 133-flange; 14-second branch; 15-brush inside the pipe; 16-brush outside the pipe; 17-driving rack; 18-driving gear; 19-L-type mounting rod; 20-connecting shaft. DETAILED DESCRIPTION

[0025] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of the present invention and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not used to limit the scope of the present invention.

[0026] Embodiment 1

[0027] This embodiment provides a wet reciprocating filter dust removal device, see Figure 1 , including a front atomizing nozzle 1, an intermediate atomizing nozzle 2, a reciprocating filter 3 (for example, a metal reciprocating filter), a demister 4 (for example, a C-type baffle demister) and an induced draft fan 5 (for example, an axial flow fan) which are arranged in sequence along the dust airflow direction, wherein the spray direction of the front atomizing nozzle 1 is perpendicular to the dust airflow direction, the spray direction of the intermediate atomizing nozzle 2 is along the dust airflow direction and toward the reciprocating filter 3, and the reciprocating filter 3 reciprocates along the dust airflow direction.

[0028] During implementation, the induced draft fan 5 is turned on to allow the dust airflow to enter the processing chamber (i.e., the housing 6) of the dust removal device; the front atomizing nozzle 1 and the intermediate atomizing nozzle 2 are turned on, and fine droplets are sprayed out from the front atomizing nozzle 1 and the intermediate atomizing nozzle 2. The front atomizing nozzle 1 performs a dust removal (i.e., pre-dust removal) on the dust airflow, so that most of the large particles and a small part of the fine particles in the dust airflow are settled, and 40-60wt.% of the dust particles in the dust airflow are removed; the intermediate atomizing nozzle 2 performs a secondary dust removal (i.e., fine dust removal) on the dust airflow; the droplets sprayed from the intermediate atomizing nozzle 2 form a liquid film on the reciprocating filter 3, and the liquid film can further settle and remove fine dust particles, and the dust airflow is subjected to a third dust removal to obtain a dust-removed airflow; the dust-removed airflow passes through the demister 4 to remove the water mist in the dust-removed airflow, and the dust-removed and demisted air is obtained, meeting the safety emission standards.

[0029] Compared with the prior art, the wet reciprocating filter dust removal device provided in this embodiment is used to control coal mine dust. It combines spray dust removal technology with reciprocating filter 3 dust removal technology. While achieving high-efficiency and high-precision removal of dust particles, it can avoid clogging of the reciprocating filter 3 and reduce the wind resistance of the dust removal device. It has the advantages of low energy consumption, simple operation, and low operating cost. It has positive promotion significance and significant application value. After testing, the removal rate of total dust and respirable dust is 90~95%.

[0030] Specifically, on the one hand, by setting the front atomizing nozzle 1, the intermediate atomizing nozzle 2 and the reciprocating filter 3, the dust airflow can be dust-removed three times, thereby effectively removing the dust particles in the dust airflow; on the other hand, the intermediate atomizing nozzle 2 and the reciprocating filter 3 can form a small fine dust removal system, and the droplets sprayed by the intermediate atomizing nozzle 2 not only contact the dust particles in the dust airflow, but also form a liquid film on the reciprocating filter 3 after contacting the reciprocating filter 3, and the dust particles are intercepted by the liquid film, and the fine dust particles are further precipitated and removed. The particle size of the fine dust particles is less than 10μm; on the other hand, the reciprocating motion of the reciprocating filter 3 can promote the timely sedimentation of the liquid film and form a new liquid film to prevent the reciprocating filter 3 from being blocked, thereby improving the dust removal efficiency and effect.

[0031] In order to provide processing space for the dust airflow, it can be understood that the above-mentioned wet reciprocating filter dust removal device also includes an outer shell 6, and the liquid outlet of the front atomizing nozzle 1, the liquid outlet of the intermediate atomizing nozzle 2, the reciprocating filter 3 and the demister 4 are all located in the outer shell 6. The dust airflow flows in the outer shell 6 for dust removal and demisting treatment.

[0032] In order to ensure that the wet reciprocating filter dust removal device has enough space to process the dust airflow, illustratively, the diameter of the outer shell 6 is 40-50 cm, and the length of the outer shell 6 is 120-180 cm.

[0033] In order to facilitate the discharge of waste liquid after dust removal, the wet reciprocating filter screen dust removal device further includes a sewage pipe 7, a sewage outlet is provided at the bottom of the housing 6, and the sewage pipe 7 is connected to the sewage outlet. It should be noted that the sewage discharged from the sewage pipe 7 is coal slurry water, and the liquid outlet of the sewage pipe 7 is connected to the centrifuge and / or the filter press in turn, and the coal slurry water is converted into coal slurry by centrifugation or filter pressing, so as to achieve recycling.

[0034] In order to ensure the dust removal efficiency and dust removal effect of each dust removal, the front atomizing nozzle 1, the middle atomizing nozzle 2 and the reciprocating filter 3 need to be placed in appropriate positions. For example, the distance between the front atomizing nozzle 1 and the air inlet end of the housing 6 is 15-30 cm, the distance between the middle atomizing nozzle 2 and the air inlet end of the housing 6 is 35-50 cm, the distance between the middle atomizing nozzle 2 and the reciprocating filter 3 is 15-30 cm, and the distance between the front atomizing nozzle 1 and the middle atomizing nozzle 2 is 15-20 cm. In this way, the dust removal efficiency and dust removal effect of the first dust removal, the second dust removal and the third dust removal can be guaranteed at the same time. Among them, limiting the distance between the front atomizing nozzle 1 and the air inlet end of the outer shell 6 within the above-mentioned range can ensure that the dust airflow is fully removed once; limiting the distance between the front atomizing nozzle 1 and the intermediate atomizing nozzle 2 within the above-mentioned range can avoid the airflow disturbance caused by the close distance between the two, which deteriorates the dust removal effect; limiting the distance between the intermediate atomizing nozzle 2 and the reciprocating filter 3 within the above-mentioned range, so that the droplets sprayed by the intermediate atomizing nozzle 2 are evenly formed on the reciprocating filter 3, and the contact with the dust airflow is more uniform.

[0035] Considering that the liquid outlet of the front atomizing nozzle 1 will contact with the dust airflow, in order to reduce the possibility of blockage, the distance between the front atomizing nozzle 1 and the center line of the housing 6 is 25-35 cm. In this way, on the one hand, the front atomizing nozzle 1 is arranged at a high position, which can reduce the possibility of blockage of the liquid outlet of the front atomizing nozzle 1. On the other hand, the droplets sprayed from the liquid outlet of the front atomizing nozzle 1 are usually distributed in a divergent manner. The high-position arrangement can increase the contact area and contact time between the droplets sprayed from the front atomizing nozzle 1 and the dust airflow, further improving the dust removal efficiency and dust removal effect.

[0036] It can be understood that in order to drive the reciprocating filter 3 to perform reciprocating motion, the above-mentioned wet reciprocating filter dust removal device also includes a crank-connecting rod reciprocating mechanical unit 8 and a connecting rod 9. The reciprocating filter 3 is connected to the crank-connecting rod reciprocating mechanical unit 8 through the connecting rod 9, and the reciprocating filter 3 is driven to perform reciprocating motion through the crank-connecting rod reciprocating mechanical unit 8.

[0037] In order to promote the timely sedimentation of the liquid film and form a new liquid film, the above-mentioned reciprocating filter screen 3 is provided with a connecting shaft 20, and the connecting shaft 20 is provided with a through hole along the axial direction. The cross-sectional shape of the through hole is a long strip, and one end of the connecting rod 9 is inserted into the through hole and the connecting rod 9 and the hole wall of the through hole have a gap in the vertical direction. The above-mentioned wet reciprocating filter screen dust removal device also includes a slide rail 10, and the reciprocating filter screen 3 is placed on the slide rail 10 and can slide relative to the slide rail 10; the cross-sectional shape of the slide rail 10 parallel to the movement direction of the reciprocating filter screen 3 is a triangle, and the slide rail 10 is arranged on the bottom surface of the outer shell 6 and can rotate around the mid-vertical line of the bottom edge in the horizontal direction. The initial position of the reciprocating filter 3 is the lowest point of the slide rail 10 (i.e., the end away from the middle atomizing nozzle 2, the height of the lowest point is 0). During the reciprocating motion of the reciprocating filter 3, the reciprocating filter 3 gradually moves upward along the slide rail 10. At the same time, the end of the connecting shaft 20 moves upward in the through hole, and the displacement of the reciprocating filter 3 in the vertical direction is adapted through the gap between the through hole and the connecting shaft 20. When the reciprocating filter 3 reaches the highest point of the slide rail 10 and continues to move, it will suddenly detach from the slide rail 10, fall in the vertical direction and vibrate. The vibration causes the liquid film to immediately detach from the reciprocating filter 3, and the droplets sprayed from the middle atomizing nozzle 2 will form a new liquid film on the reciprocating filter 3. While vibrating, the slide rail 10 rotates 180° in the horizontal direction, and the above movement process is repeated. See Figure 2 .

[0038] Similarly, in order to supply liquid to the front atomizing nozzle 1 and the intermediate atomizing nozzle 2, the above-mentioned wet reciprocating filter dust removal device also includes a liquid pump 11 (for example, a high-pressure water pump) and a liquid supply pipeline, and the front atomizing nozzle 1 and the intermediate atomizing nozzle 2 are respectively connected to the liquid pump 11 through the liquid supply pipeline.

[0039] Exemplarily, the liquid supply pipeline includes a main line 12, a first branch 13 and a second branch 14. The front atomizing nozzle 1 is connected to the main line 12 through the first branch 13, and the intermediate atomizing nozzle 2 is connected to the main line 12 through the second branch 14. The axis of the first branch 13 and the axis of the second branch 14 are both perpendicular to the axis of the main line 12, and the inner diameters of the first branch 13 and the second branch 14 are 1.6~2.4.

[0040] Considering that the liquid outlet of the front atomizing nozzle 1 will inevitably deposit too much dust and cause blockage, in the prior art, for the blockage of the nozzle inside the cavity, it is usually necessary to remove the nozzle from the cavity. However, this method requires suspending the processing of the dust airflow, and the process is complicated. In this embodiment, the first branch 13 is a telescopic branch, that is, it includes a first tube body 131 and a second tube body 132 connected in sequence along a direction gradually away from the main tube 12. The second tube body 132 is connected to the nozzle cover of the front atomizing nozzle 1. A plurality of spray holes are provided on the nozzle cover. The aperture of the spray hole is 1.6~2.4mm. The second tube body 132 is provided with a sleeve The outer wall of the first tube body 131 is slidably sealed and connected to the first tube body 131. The first tube body 131 is located outside the shell 6. The second tube body 132 is provided with a flange 133 at one end close to the first tube body 131. The second tube body 132 is located inside the shell 6. The flange 133 is located outside the shell 6. The wet reciprocating filter dust removal device also includes a nozzle dredging assembly. The nozzle conveying assembly includes an inner tube brush 15. The brush rod end of the inner tube brush 15 is fixedly connected to the first tube body 131. The bristle end of the inner tube brush 15 protrudes into the second tube body 132. The bristles of the inner tube brush 15 are in contact with the inner wall of the second tube body 132. See Figure 3 In this way, the operator pulls the flange 133 back and forth to make the second tube body 132 move relative to the first tube body 131 , and the brush 15 in the tube can brush the inner wall of the second tube body 132 .

[0041] In order to be able to brush the nozzle cover, the nozzle dredging assembly further includes an outer tube brush 16, a driving rack 17, a driving gear 18 and an L-shaped mounting rod 19. The driving rack 17 is arranged on the outer wall of the second tube body 132, the driving gear 18 is vertically meshed with the driving rack 17, one end of the L-shaped mounting rod 19 is fixedly connected to the driving gear 18, and the other end of the L-shaped mounting rod 19 is fixedly connected to the brush rod end of the outer tube brush 16. The other end of the outer tube brush 16 is located below the nozzle cover and the brush is in contact with the nozzle cover. In this way, when the second tube body 132 reciprocates up and down, it will drive the rack to reciprocate up and down, thereby driving the driving gear 18 to rotate and the L-shaped mounting rod 19 to swing, so that the brush swings reciprocatingly relative to the nozzle cover to brush the nozzle cover.

[0042] It should be noted that by improving the structure of the first branch 13 and setting up the nozzle clearing assembly, the inner wall of the second tube 132 and the nozzle cover can be brushed simultaneously without removing the first branch 13, thereby reducing the possibility of blockage of the first branch 13.

[0043] Using the wet reciprocating filter dust removal device provided above, the specific dust removal method includes the following steps:

[0044] Step 1: Turn on the induced draft fan 5 to allow the dust airflow to enter the processing chamber (i.e., the housing 6) of the dust removal device, and the flow rate of the dust airflow is 4-10 m / s;

[0045] Step 2: Turn on the front atomizing nozzle 1, and fine droplets are sprayed from the front atomizing nozzle 1 and the middle atomizing nozzle 2. The front atomizing nozzle 1 performs a dust removal (i.e., pre-dust removal) on the dust airflow, so that most of the large particles and a small part of the fine particles in the dust airflow are settled, and 40-60wt.% of the dust particles in the dust airflow are removed;

[0046] Step 3: Turn on the middle atomizing nozzle 2, which performs secondary dust removal on the dust airflow;

[0047] Step 4: The droplets sprayed from the middle atomizing nozzle 2 form a liquid film on the reciprocating filter 3, and the liquid film can further settle and remove fine dust particles, and the dust airflow is dedusted three times to obtain a dust-free airflow;

[0048] Step 5: The airflow after dust removal passes through the demister 4 to remove the water mist in the airflow after dust removal, so as to obtain the air after dust removal and demisting.

[0049] It should be noted that the above dust removal method is suitable for dust removal of dust airflow with a dust concentration of 0~100mg / m³.

[0050] In order to ensure that the nozzle has sufficient spraying pressure, the liquid supply flow rate of the front atomizing nozzle 1 and the middle atomizing nozzle 2 is 1~3m 3 / h.

[0051] In order to promote the reduction of the flow resistance of the dust airflow while ensuring the formation of the liquid film, the mesh size of the reciprocating filter 3 is 500-200 μm, the reciprocating motion frequency is 0.1-5 Hz, and the reciprocating motion amplitude is 0.1-5 cm.

[0052] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by any technician familiar with the technical field within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. A wet reciprocating filter screen dust removal device, characterized in that: It includes a front atomizing nozzle, an intermediate atomizing nozzle, a reciprocating filter, a demister, an induced draft fan, a crank-connecting rod reciprocating mechanical unit, a connecting rod and a slide rail which are sequentially arranged along the dust airflow direction; It also includes a shell, wherein the liquid outlet of the front atomizing nozzle, the liquid outlet of the middle atomizing nozzle, the reciprocating filter screen and the demister are all located in the shell; The spray direction of the front atomizing nozzle is perpendicular to the dust airflow direction, the spray direction of the intermediate atomizing nozzle is along the dust airflow direction and toward the reciprocating filter screen, the reciprocating filter screen reciprocates along the dust airflow direction, the reciprocating filter screen is connected to the crank-connecting rod reciprocating mechanical unit through a connecting rod, and the reciprocating filter screen is driven to reciprocate through the crank-connecting rod reciprocating mechanical unit; The reciprocating filter is placed on the slide rail and can slide relative to the slide rail; the cross-sectional shape of the slide rail parallel to the moving direction of the reciprocating filter is triangular, the slide rail is arranged on the bottom surface of the shell and can rotate around the mid-perpendicular line of the bottom edge in the horizontal direction, the reciprocating filter moves from the lowest point of the slide rail to the highest point of the slide rail and continues to move forward, then falls in the vertical direction and vibrates, and the slide rail rotates 180° in the horizontal direction while vibrating; A connecting shaft is provided in the center of the reciprocating filter in the axial direction, and a through hole is provided in the axial direction of the connecting shaft. One end of the connecting rod is inserted into the through hole, and a gap is provided between the connecting rod and the hole wall of the through hole in the vertical direction, so as to accommodate the displacement of the reciprocating filter in the vertical direction. The wet reciprocating filter screen dust removal device also includes a liquid pump and a liquid supply pipeline, and the front atomizing nozzle and the intermediate atomizing nozzle are respectively connected to the liquid pump through the liquid supply pipeline; The liquid supply pipeline includes a main pipeline, a first branch pipeline and a second branch pipeline, the front atomizing nozzle is connected to the main pipeline through the first branch pipeline, and the middle atomizing nozzle is connected to the main pipeline through the second branch pipeline; The first branch line includes a first pipe body and a second pipe body connected in sequence along a path gradually away from the main pipe; The second tube body is connected to the nozzle cover of the front atomizing nozzle, and a plurality of nozzle holes are provided on the nozzle cover; The wet reciprocating filter screen dust removal device also includes a nozzle dredging assembly, and the nozzle dredging assembly includes an in-pipe brush; The second tube body is sleeved on the outer wall of the first tube body and is slidably sealed and connected to the first tube body, the first tube body is located outside the shell, a flange is provided at one end of the second tube body close to the first tube body, the second tube body is located inside the shell, and the flange is located outside the shell; The brush rod end of the in-tube brush is fixedly connected to the first tube body, the bristle end of the in-tube brush protrudes into the second tube body, and the bristles of the in-tube brush contact the inner wall of the second tube body.

2. The wet reciprocating filter dust removal device according to claim 1, characterized in that: The nozzle dredging assembly further comprises an outer tube brush, a driving rack, a driving gear and an L-shaped mounting rod, wherein the driving rack is arranged on the outer wall of the second tube body, the driving gear is vertically meshed with the driving rack, one end of the L-shaped mounting rod is fixedly connected to the driving gear, the other end of the L-shaped mounting rod is fixedly connected to the brush rod end of the outer tube brush, and the other end of the outer tube brush is located below the nozzle cover and the brush is in contact with the nozzle cover; When the second tube body reciprocates up and down, it drives the brush to swing reciprocatingly relative to the nozzle cover to scrub the nozzle cover.

3. The wet reciprocating filter dust removal device according to claim 1, characterized in that: The axis of the first branch and the axis of the second branch are both perpendicular to the axis of the main branch.

4. The wet reciprocating filter dust removal device according to claim 1, characterized in that: It also includes a sewage discharge pipe, a sewage discharge port is arranged at the bottom of the shell, and the sewage discharge pipe is connected with the sewage discharge port.

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