Circulating device for dust removal of spray tower

Abstract

The utility model provides a circulating device for dust removal of a spray tower, which belongs to the technical field of spray tower dust removal equipment and comprises a diversion trench arranged at the bottom of the spray tower, a water outlet pipeline arranged on the diversion trench and penetrating through the wall of the spray tower, a sedimentation tank arranged at the lower part of the water outlet end of the water outlet pipeline, and a group of dosing components symmetrically arranged at the top of the sedimentation tank, one side of the sedimentation tank is provided with an overflow port, one surface, far away from the sedimentation tank, of the overflow port is communicated with a stirring tank, one surface, far away from the sedimentation tank, of the stirring tank is provided with a clean water tank, and the upper part of the clean water tank is provided with a recycling pipeline. And the supernatant enters the clean water tank through the overflow port and the stirring tank, is sucked into the self-suction barrel through the self-suction barrel, and is supplied into the spraying pipeline through the water supply pump, so that the secondary utilization of the spraying waste liquid is realized, the purification quality of the spraying waste liquid is also improved, and the dust removal quality of the waste gas by using the supernatant in the spraying tower is stabilized.

Description

TECHNICAL FIELD

[0001] The utility model relates to a spray tower dust removal equipment technical field, concretely relates to a circulating device for spray tower dust removal. BACKGROUND

[0002] The spray tower is also called acid mist neutralization tower, desulfurization tower, washing tower, absorption tower, purification tower, etc., and is a new type of wet dust removal equipment for treating dust, particles and other pollutants in waste gas.

[0003] The spray tower in the related art is widely used in waste gas treatment in many industries such as chemical industry, electronics, metallurgy, electroplating, and textile. For example, chemical raw materials, textiles, food, etc. need to be dried to remove water to ensure their quality and stability. However, when these items are dried, the equipment will generate waste gas. The use of a spray tower can effectively remove dust, oil stains, harmful gases (such as hydrogen sulfide and nitrogen oxides) and water-soluble gases in the waste gas, and through the spray washing process, the dust in the waste gas is removed.

[0004] At present, most of the spray towers mix water and waste gas after spraying, and the mixture is settled at the bottom of the spray tower. Then, the mixture at the bottom of the spray tower is pumped out of the spray tower by a drainage pump for discharge, thereby realizing the treatment of the dried waste gas. However, the existing gas-containing waste liquid is discharged into a sedimentation tank after being discharged from the spray tower, and solid-liquid separation is performed in the sedimentation tank. The supernatant in the sedimentation tank is supplied into the spray tower to realize recycling. However, natural sedimentation in the sedimentation tank reduces the dust removal speed. When the treatment capacity is too large, the dust removal quality is reduced. When the recycled water with poor dust removal quality is used, the dust removal quality inside the spray tower is also reduced, thereby causing poor recycling. To solve the above problems, a circulating device for spray tower dust removal is proposed to solve the above problems. SUMMARY

[0005] Therefore, the utility model provides a circulating device for spray tower dust removal. The spray waste liquid enters the sedimentation tank through the water outlet pipe. The coagulant is sprayed into the sedimentation tank by the dosing assembly. The waste liquid is subjected to solid-liquid separation by the coagulant and the filter plate. The supernatant at the top of the sedimentation tank flows into the stirring tank through the overflow port. The supernatant in the clear water tank is sucked into the self-suction barrel through the self-suction barrel and the recycled pipe by using the negative pressure air suction principle. The liquid in the self-suction barrel is supplied into the spray pipe by the water supply pump, thereby realizing the secondary use of the spray waste liquid. The purification quality of the spray waste liquid is also improved, thereby stabilizing the quality of the waste gas dust removal using the supernatant in the spray tower.

[0006] The utility model provides a kind of circulating device for dust removal of spray tower, including the air guide fan of spray tower lower part intercommunication arrangement, the flow guide groove of spray tower bottom setting, the water outlet pipeline of flow guide groove through spray tower wall setting, the spray pipeline of spray tower upper outer wall setting, the sedimentation tank of water outlet of water outlet pipeline lower part setting, a group of dosing assembly is symmetrically set in the top of sedimentation tank, overflow weir is provided on the side of sedimentation tank, and the stirring tank is intercommunicated and is provided on the side of overflow weir away from sedimentation tank, the overflow pipe of stirring tank away from sedimentation tank side is provided, and the clean water tank is intercommunicated and is provided on the side of multiple overflow pipes away from sedimentation tank, the reuse pipeline is provided on the upper portion of clean water tank, the water outlet end of reuse pipeline is provided with self-suction barrel, the water outlet end of self-suction barrel is provided with water replenishing pipeline, and the water outlet end of water replenishing pipeline is intercommunicated and is provided with water supply pump, and the water outlet end of water supply pump is intercommunicated with spray pipeline.

[0007] The filter plate is arranged in the lower portion of the sedimentation tank, and is used for separating the spray waste liquid after dosing into solid and liquid.

[0008] Each dosing assembly includes a cross arm arranged on the top of the sedimentation tank, the cross arm is used for mounting the spray branch pipe and supporting the spray main pipe, a plurality of spray branch pipes are arranged through the surface of the cross arm, the spray branch pipes are used for spraying the flocculating agent in the spray main pipe into the waste liquid in the sedimentation tank, one spray main pipe is arranged in common communication with the top of the plurality of spray branch pipes, the spray main pipe is used for conveying the liquid medicine to the spray branch pipes, one diffusion nozzle is arranged at the liquid outlet end of each spray branch pipe, the diffusion nozzle is used for expanding the spraying area of the spray branch pipe, one first valve is arranged at the liquid inlet end of each spray main pipe, the first valve can also be used for spraying the liquid medicine for each spray assembly, the first valve is used for controlling the opening and closing of the spray main pipe, and a water-following tee joint is arranged between the first valves, the water-following tee joint is used for connecting the two spray main pipes.

[0009] The liquid inlet end of the water-following tee joint is provided with a dosing pipe, the dosing pipe is used for supplying the flocculating agent to the liquid outlets at the horizontal ends of the water-following tee joint, the liquid outlet end of the dosing pipe is provided with a second valve, the second valve is used for controlling the opening and closing of the dosing pipe, a metering pump is arranged at the liquid inlet end of the dosing pipe, the metering pump is used for supplying the liquid medicine in the liquid medicine storage barrel to the dosing pipe, the liquid inlet end of the metering pump is provided with the liquid medicine storage barrel, and the liquid medicine storage barrel is used for storing the prepared flocculating agent.

[0010] The support frame is arranged on the top of the stirring pool and is used for fixing and supporting the stirring motor, a plurality of stirring motors are arranged on the support plate of the support frame, the stirring motors are used for driving the stirring shaft to rotate, the lower end of the stirring motor is provided with a stirring shaft, the stirring shaft is used for driving the stirring paddle to stir and mix the waste liquid in the stirring pool, a plurality of stirring paddles are arranged on the surface of the stirring shaft, the stirring paddles are used for stirring the waste liquid in the stirring pool, the lower end of the stirring shaft is provided with a sealing bearing, the sealing bearing is used for fixing the stirring shaft, preventing the stirring shaft from being suspended, and maintaining the stability of the stirring shaft during rotation, and the sealing bearing is fixed with the bottom of the stirring pool.

[0011] The overflow groove is arranged in the overflow port and is used for flowing the waste liquid in the sedimentation pool after sedimentation into the stirring pool, and a sealing plate is arranged on the left and right sides of the overflow groove, and the sealing plate is used for preventing water leakage from the connection gap between the overflow groove and the stirring pool.

[0012] The third valve is arranged on the overflow pipe and is used for opening and closing the overflow pipe, thereby controlling the volume of the liquid in the stirring pool flowing into the clean water pool, the first liquid level meter is arranged on the top of the sedimentation pool and is used for detecting the liquid level height in the sedimentation pool, and the second liquid level meter is arranged on the top of the clean water pool and is used for detecting the liquid level height in the clean water pool.

[0013] The bottom of the sedimentation pool is communicated with the blowdown pipeline, the blowdown pipeline is used for discharging the dirt deposited in the lower part of the filter plate, the liquid outlet end of the blowdown pipeline is provided with the fourth valve, the fourth valve is used for opening and closing the blowdown pipeline, and the fourth valve is also used for connecting the blowdown pump.

[0014] Compared with the prior art, the present application has at least one of the following beneficial technical effects:

[0015] 1. The spray waste liquid enters the sedimentation pool through the water outlet pipeline, the flocculating agent is sprayed into the sedimentation pool through the dosing assembly, the waste liquid is subjected to solid-liquid separation through the flocculating agent and the filter plate, the supernatant on the top of the sedimentation pool flows into the stirring pool through the overflow port, the stirring motor is started to stir the supernatant in the stirring pool, the supernatant enters the clean water pool through the third valve and the overflow pipe, the self-suction barrel is matched with the reuse pipeline, the negative pressure suction principle is used to suck the supernatant in the clean water pool into the self-suction barrel, the liquid in the self-suction barrel is supplied to the spray pipeline through the water supply pump, thereby realizing the secondary use of the spray waste liquid, improving the purification quality of the spray waste liquid, and stabilizing the quality of the waste gas dust removal using the supernatant in the spray tower.

[0016] 2. The cross arm is used for mounting a plurality of spray branch pipes and supporting a spray main pipe, the spray branch pipe is used for spraying the flocculating agent in the spray main pipe into the waste liquid at different positions in the sedimentation pool, the first valve is used for controlling the opening and closing of the spray main pipe, and the first valve can also be used for spraying each spray assembly separately, thereby reducing the consumption of medicines.

[0017] 3, the stirring motor is used for driving the stirring shaft to rotate, so as to drive the stirring paddle on the stirring shaft to stir the supernatant in the stirring pool, and the supernatant in the stirring pool is more clear after stirring and stopping. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is the schematic diagram of the main body structure of the utility model;

[0019] Figure 2 It is the top view of the utility model;

[0020] Figure 3 It is the front view of the utility model;

[0021] Figure 4 It is the side view of the utility model;

[0022] Figure 5 It is the lower half view of the utility model;

[0023] Figure 6 It is the A local enlarged view of the utility model; Figure 5

[0024] BRIEF DESCRIPTION OF DRAWINGS: 100, spray tower; 101, induced draft fan; 102, guide groove; 103, water outlet pipeline; 104, spray pipeline; 105, overflow groove; 106, sealing plate; 200, sedimentation tank; 201, overflow port; 202, filter plate; 203, positioning frame; 204, blowdown pipeline; 205, fourth valve; 300, dosing assembly; 301, cross arm; 302, medicine spraying branch pipe; 303, medicine spraying main pipe; 304, diffusion nozzle; 305, first valve; 306, water following tee; 307, dosing pipe; 308, second valve; 309, metering pump; 310, medicine storage barrel; 400, stirring pool; 401, overflow pipe; 402, clean water pool; 403, support frame; 404, stirring motor; 405, stirring shaft; 406, stirring paddle; 407, sealing bearing; 408, third valve; 500, reuse pipeline; 501, self-suction barrel; 502, water replenishing pipeline; 503, water supply pump; 504, first liquid level meter; 505, second liquid level meter. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the following will combine the drawings of the embodiments of the utility model to make clear and complete description of the technical scheme of the embodiments of the utility model. Figures 1-6 It is obvious that the described embodiments are part of the embodiments of the utility model, not all the embodiments. Based on the described embodiments of the utility model, all other embodiments obtained by the person skilled in the art belong to the scope of protection of the utility model. ​

[0026] As Figures 1-6The embodiment provides a circulating device for dust removal of a spray tower, which comprises an air draught fan 101 arranged in communication with the lower part of a spray tower 100, the air inlet end of the air draught fan 101 is communicated with a waste gas collector generated by a drying device, a flow guide groove 102 is arranged at the bottom of the spray tower 100, the bottom of the flow guide groove 102 is arc-shaped to facilitate the flow of accumulated water, a water outlet pipeline 103 is arranged in the tower wall of the spray tower 100 and penetrates the flow guide groove 102, the water outlet pipeline 103 is used for making the spray waste liquid stored in the flow guide groove 102 flow into a sedimentation tank 200, an electric valve is arranged on the water outlet pipeline 103, a spray pipeline 104 is arranged on the outer wall of the spray tower 100, the spray pipeline 104 is connected with a spray original water supply pipe through a tee joint and is used for original water supply of the spray pipeline 104, the spray pipeline 104 is used for supplying spray liquid to a spray device on the spray tower 100, the water outlet end of the water outlet pipeline 103 is arranged with the sedimentation tank 200 at the lower part, the sedimentation tank 200 is used for sedimentation and filtration of the spray waste liquid, a group of dosing assemblies 300 are symmetrically arranged at the top of the sedimentation tank 200, the dosing assemblies 300 are used for adding flocculants to the spray waste liquid in the sedimentation tank 200, so that dirt in the spray waste liquid in the sedimentation tank 200 can be quickly precipitated and coagulated, an overflow port 201 is arranged on one side of the sedimentation tank 200, the overflow port 201 is used for communication between the sedimentation tank 200 and a stirring tank 400, the overflow port 201 is used for overflowing supernatant at the top of the sedimentation tank 200 into the stirring tank 400, the stirring tank 400 is arranged in communication with the sedimentation tank 200 on the side away from the sedimentation tank 200, a plurality of overflow pipes 401 are arranged on the side of the stirring tank 400 away from the sedimentation tank 200, the overflow pipes 401 are used for making the spray waste liquid after stirring in the stirring tank 400 flow into a clean water tank 402, the clean water tank 402 is arranged in common communication with the overflow pipes 401 away from the sedimentation tank 200, the clean water tank 402 is used for storing the spray waste liquid after sedimentation and stirring, a recycling pipeline 500 is arranged at the upper part of the clean water tank 402, the recycling pipeline 500 is used for pumping the liquid in the clean water tank 402, a self-suction barrel 501 is arranged at the water outlet end of the recycling pipeline 500, the self-suction barrel 501 mainly works by using the negative pressure principle, a small hole is arranged at the bottom of the self-suction barrel 501 to match the negative pressure environment in the pipeline, when the liquid in the self-suction barrel 501 is pumped out through the pipeline, negative pressure is generated in the barrel, the negative pressure leaks into the pipeline through the small hole, and then continuously pumps the liquid by transmission, the recycling pipeline 500 extends into the clean water tank 402, the liquid inlet of the recycling pipeline 500 is lower than the height of the liquid outlet end of the overflow pipes 401, a water supplement pipeline 502 is arranged at the water outlet end of the self-suction barrel 501, the water supplement pipeline 502 is in sealing communication with the self-suction barrel 501 through a flange, a water supply pump 503 is arranged in communication with the water outlet end of the water supplement pipeline 502, the water supply pump 503 can be a corrosion-resistant pump, the water inlet end of the water supply pump 503 is in sealing communication with the water supplement pipeline 502, the water outlet end of the water supply pump 503 is in sealing communication with the spray pipeline 104, and an electric valve is arranged between the water supply pump and the self-suction barrel 501.

[0027] The embodiment provides a circulating device for dust removal of a spray tower 100,

[0028] As shown in Figure 1 , 3 , 5: a filter plate 202 is arranged at the lower part of the sedimentation tank 200, the filter plate 202 is used for solid-liquid separation of the dosed spray waste liquid, positioning frames 203 are arranged at the two sides of the filter plate 202, the filter plate 202 is fixedly connected with the positioning frames 203 through bolts, the positioning frames 203 are fixedly welded with the inner wall of the sedimentation tank 200, the positioning frames 203 are used for mounting the filter plate 202 so that the filter plate 202 is connected with the inner wall of the sedimentation tank 200, the positioning frames 203 are fixed with the inner wall of the sedimentation tank 200, the overflow port 201 is higher than the filter plate 202, and the overflow port 201 is located at the upper half of the sedimentation tank 200.

[0029] The filter plate 202 is used for solid-liquid separation of the dosed spray waste liquid, so that the flocculated precipitate sinks below the filter plate 202, the positioning frames 203 are used for mounting the filter plate 202 so that the filter plate 202 is connected with the inner wall of the sedimentation tank 200, and the filter plate 202 is prevented from falling, and the positioning frames 203 are also used for subsequent dismounting and replacement of the filter plate 202.

[0030] As shown in Figure 1 , 2 , 3, 5 and 6: each group of dosing assemblies 300 comprises a cross arm 301 arranged at the top of the sedimentation tank 200, the cross arm 301 is fixedly welded with the top of the sedimentation tank 200, the cross arm 301 is arranged at the top of the sedimentation tank 200, the cross arm 301 is used for mounting spray branch pipes 302 and supporting a spray main pipe 303, a plurality of spray branch pipes 302 are arranged through the surface of the cross arm 301, the water outlet ends of the spray branch pipes 302 penetrate through the cross arm 301 and face the sedimentation tank 200, the spray branch pipes 302 are used for spraying flocculating agent in the spray main pipe 303 into the waste liquid in the sedimentation tank 200, a spray main pipe 303 is arranged at the top of the plurality of spray branch pipes 302 and is in communication with the plurality of spray branch pipes 302, the spray main pipe 303 is in hot-melt communication with the spray branch pipes 302, the spray main pipe 303 is used for conveying liquid medicine to the spray branch pipes 302, a diffusion nozzle 304 is arranged at the liquid outlet end of each spray branch pipe 302, the diffusion nozzle 304 is fixedly connected with the spray branch pipe 302 through threads, the diffusion nozzle 304 is used for expanding the spraying area of the spray branch pipe 302, a first valve 305 is arranged at the liquid inlet end of each spray main pipe 303, the first valve 305 is threadedly connected with the spray main pipe 303, the first valve 305 can be a ball valve, a water-following tee joint 306 is arranged between the first valves 305, the water outlets at the horizontal two ends of the water-following tee joint 306 are in hot-melt communication with the corresponding spray main pipes 303, and the water-following tee joint 306 is used for connecting the two spray main pipes 303.

[0031] The effect is that the cross arm 301 is used for installing a plurality of spraying branch pipes 302 and supporting a spraying main pipe 303, the spraying branch pipes 302 are used for spraying the flocculating agent in the spraying main pipe 303 to the waste liquid at different positions in the sedimentation tank 200, the first valve 305 is used for controlling the opening and closing of the spraying main pipe 303, and the first valve 305 can also be used for spraying each spraying assembly separately, so as to reduce the consumption of the medicine.

[0032] As shown in Figure 1 、 2 , 3: the liquid inlet end of the water following tee joint 306 is provided with a dosing pipe 307, the liquid outlet end of the dosing pipe 307 is in hot melting communication with the water inlet of the water following tee joint 306, the dosing pipe 307 is used for supplying the flocculating agent to the liquid outlets at the horizontal two ends of the water following tee joint 306, the liquid outlet end of the dosing pipe 307 is provided with a second valve 308, the second valve 308 is in hot melting communication with the dosing pipe 307, the second valve 308 is used for controlling the opening and closing of the dosing pipe 307, the liquid inlet end of the dosing pipe 307 is provided with a metering pump 309, the metering pump 309 is in sealing connection with the dosing pipe 307 through a flange, and the metering pump 309 is used for supplying the medicine in a medicine storage barrel 310 to the dosing pipe 307, the water inlet end of the metering pump 309 is provided with the medicine storage barrel 310, and the medicine storage barrel 310 is provided with a pipeline extending outward and in sealing connection with the liquid inlet end of the metering pump 309 through a flange.

[0033] The effect is that the dosing pipe 307 is used for supplying the flocculating agent to the liquid outlets at the horizontal two ends of the water following tee joint 306, the metering pump 309 is used for supplying the medicine in the medicine storage barrel 310 to the dosing pipe 307, and the medicine storage barrel 310 is used for storing the prepared flocculating agent.

[0034] As shown in Figure 1 、 2, 3: The top of the stirring tank 400 is provided with a support frame 403, which includes a support plate and support legs at both ends of the support plate. The support legs at both ends of the support frame 403 are welded and fixed to the top of the stirring tank 400. The support frame 403 is used to fix and support the stirring motor 404. A plurality of stirring motors 404 are arranged on the support plate of the support frame 403. A plurality of shaft couplings are embedded in the support plate of the support frame 403. The stirring motor 404 is sealingly connected to the stirring shaft 405 through the shaft coupling. The stirring motor 404 is used to drive the stirring shaft 405 to rotate. The lower end of the stirring motor 404 is provided with the stirring shaft 405. The stirring shaft 405 is used to drive the stirring paddle 406 to stir and mix the waste liquid in the stirring tank 400. A plurality of stirring paddles 406 are arranged on the surface of the stirring shaft 405. The stirring paddles 406 are welded and fixed to the surface of the stirring shaft 405. The stirring paddles 406 are used to stir the waste liquid in the stirring tank 400. The lower end of the stirring shaft 405 is provided with a sealing bearing 407. The sealing bearing 407 is embedded in the bottom of the stirring tank 400. The lower end of the stirring shaft 405 is mechanically sealingly connected to the sealing bearing 407. The sealing bearing 407 is used to fix the stirring shaft 405, preventing the stirring shaft 405 from being suspended in the air, so that the stirring shaft 405 can maintain stability when rotating. The sealing bearing 407 is fixed to the bottom of the stirring tank 400. A first liquid level meter 504 can be additionally arranged on the top of the stirring tank 400 to detect the liquid level in the stirring tank 400. A sewage discharge pipe 204 can also be additionally arranged on the bottom of the stirring tank 400 to extend out of the ground.

[0035] The effect is that the stirring motor 404 is used to drive the stirring shaft 405 to rotate, thereby driving the stirring paddles 406 on the stirring shaft 405 to stir the supernatant in the stirring tank 400. After stirring, the machine is stopped and the supernatant is precipitated, so that the supernatant flowing into the clear water tank 402 is clearer.

[0036] As shown in Figure 1 , 3 , 5, 6: The overflow port 201 is provided with an overflow tank 105. The overflow tank 105 is welded in the overflow port 201. One side of the overflow tank 105 facing the stirring tank 400 is provided with a flow guide plate. One side of the overflow tank 105 is provided with a sealing plate 106 on the left and right sides. One side of the sealing plate 106 is welded to the sedimentation tank 200, and the other side is welded to the stirring tank 400.

[0037] The effect is that the overflow tank 105 is used to make the supernatant in the sedimentation tank 200 flow into the stirring tank 400 after precipitation. The sealing plate is used to prevent water leakage from the connection gap between the overflow tank 105 and the stirring tank 400.

[0038] As shown in Figure 1 , 2, 3: the overflow pipe 401 is provided with a third valve 408, the third valve 408 is sealed and connected with the overflow pipe 401 using flange, the third valve 408 can adopt electric type, the third valve 408 is used for opening and closing the overflow pipe 401, thereby controlling the volume of liquid flowing into the clean water pool 402 in the mixing pool 400, the top of the sedimentation tank 200 is provided with a first liquid level meter 504, the first liquid level meter 504 adopts ultrasonic liquid level meter, the upper portion of the first liquid level meter 504 is provided with a support plate and is welded and fixed with the top of the sedimentation tank 200, the first liquid level meter 504 is used for detecting the liquid level height in the sedimentation tank 200, the top of the clean water pool 402 is provided with a second liquid level meter 505, the second liquid level meter 505 can adopt ultrasonic liquid level meter, the top of the second liquid level meter 505 can be provided with a support plate and is welded and fixed with the top of the clean water pool 402, and the second liquid level meter 505 is used for detecting the liquid level height in the clean water pool 402.

[0039] The first liquid level meter 504 is used for detecting the liquid level height in the sedimentation tank 200, and the second liquid level meter 505 is used for detecting the liquid level height in the clean water pool 402.

[0040] As shown in Figure 1 , 3 : the bottom of the sedimentation tank 200 is communicated and provided with a blowdown pipe 204, the blowdown pipe 204 is welded and communicated with the bottom of the sedimentation tank 200, the blowdown pipe 204 can adopt stainless steel pipe, and the blowdown pipe 204 is used for discharging the dirt deposited in the lower portion of the filter plate 202, the liquid outlet end of the blowdown pipe 204 is provided with a fourth valve 205, the fourth valve 205 is arranged on the liquid outlet end of the blowdown pipe 204 after the liquid outlet end of the blowdown pipe 204 extends out of the ground, the fourth valve 205 can adopt butterfly valve, the fourth valve 205 is used for opening and closing the blowdown pipe 204, and the liquid outlet end of the fourth valve 205 can be connected with a blowdown pump through flange.

[0041] The blowdown pipe 204 is used for discharging the dirt deposited in the lower portion of the filter plate 202, so that the accumulation of the sediment at the bottom of the sedimentation tank 200 does not affect the sedimentation effect.

[0042] Working principle: in use, the waste liquid is sprayed through the flow guide groove 102 into the water outlet pipe 103, and falls into the sedimentation tank 200, when the waste liquid flows over the filter plate 202, the metering pump 309 is started, two first valves 305 and a second valve 308 are opened, the flocculating agent in the storage barrel 310 is supplied into the dosing main pipe, the flocculating agent is sprayed into the sedimentation tank 200 through the dosing branch pipe at the lower end of the dosing main pipe and the diffusion nozzle 304, and the water outlet pipe 103 is continuously controlled to drain water, the waste liquid is subjected to solid-liquid separation through the flocculating agent matched with the filter plate 202, the supernatant at the top of the sedimentation tank 200 flows into the stirring tank 400 through the overflow port 201, the third valve 408 is closed, the stirring motor 404 is started to stir the supernatant in the stirring tank 400, after stirring, the motor stops working, the third valve 408 is opened to make the stirred supernatant enter the clean water tank 402, the third valve 408 is closed, and then the self-suction barrel 501 is matched with the reuse pipeline 500, the reuse pipeline 500 extends into the liquid in the clean water tank 402, and the negative pressure suction principle is used to suck the supernatant in the clean water tank 402 into the self-suction barrel 501, the liquid in the self-suction barrel 501 is supplied to the spraying pipeline 104 through the water supply pump, so that the waste liquid is reused in high quality.

[0043] In addition, it should be further pointed out that, in the description of the present application, unless otherwise specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0044] The above is the preferred embodiment of the present application, and it should be pointed out that, for those skilled in the art, without departing from the principles of the present application, a number of improvements and refinements can be made, and these improvements and refinements should also be considered as the protection scope of the present application.

Claims

1. A circulating device for dust removal of a spray tower, comprising an air inducing fan (101) arranged in communication with a lower part of a spray tower (100), a flow guide groove (102) arranged at a bottom of the spray tower (100), a water outlet pipe (103) arranged through a tower wall of the spray tower (100) and penetrating the flow guide groove (102), and a spray pipe (104) arranged on an outer wall of the spray tower (100), characterized in that: The water outlet end of the water outlet pipeline (103) is provided with a sedimentation tank (200) at the lower part, a group of dosing assemblies (300) are symmetrically arranged at the top of the sedimentation tank (200), an overflow port (201) is arranged on one side of the sedimentation tank (200), a stirring tank (400) is communicated and arranged on the side of the overflow port (201) away from the sedimentation tank (200), a plurality of overflow pipes (401) are arranged on the side of the stirring tank (400) away from the sedimentation tank (200), and the plurality of overflow pipes (401) are commonly communicated and arranged with a clean water tank (402) on the side of the stirring tank (400) away from the sedimentation tank (200), a reuse pipeline (500) is arranged at the upper part of the clean water tank (402), a self-suction barrel (501) is arranged at the water outlet end of the reuse pipeline (500), a water supplement pipeline (502) is arranged at the water outlet end of the self-suction barrel (501), and the water outlet end of the water supplement pipeline (502) is communicated and arranged with a water supply pump (503), and the water outlet end of the water supply pump (503) is communicated with the spray pipeline (104).

2. A circulating device for a spray tower (100) dust removal according to claim 1, characterized in that: A filter plate (202) is arranged at the lower part in the sedimentation tank (200), and positioning frames (203) are arranged on both sides of the filter plate (202).

3. A circulating device for dust removal of a spray tower (100) according to claim 2, characterized in that: Each group of the dosing assemblies (300) comprises a cross arm (301) arranged at the top of the sedimentation tank (200), a plurality of medicine spraying branch pipes (302) are arranged through the surface of the cross arm (301), a medicine spraying main pipe (303) is commonly communicated and arranged at the top of the plurality of medicine spraying branch pipes (302), a diffusion nozzle (304) is arranged at the liquid outlet end of each medicine spraying branch pipe (302), a first valve (305) is arranged at the liquid inlet end of each medicine spraying main pipe (303), and a water following tee (306) is arranged between the first valves (305).

4. A circulating device for dust removal of a spray tower (100) according to claim 3, characterized in that: A dosing pipe (307) is arranged at the liquid inlet end of the water following tee (306), a second valve (308) is arranged at the liquid outlet end of the dosing pipe (307), a metering pump (309) is arranged at the liquid inlet end of the dosing pipe (307), and a medicine storage barrel (310) is arranged at the water inlet end of the metering pump (309).

5. A circulating device for dust removal of a spray tower (100) according to claim 4, characterized in that: A support frame (403) is arranged at the top of the stirring tank (400), a plurality of stirring motors (404) are arranged on the support plate of the support frame (403), a stirring shaft (405) is arranged at the lower end of the stirring motor (404), a plurality of stirring paddles (406) are arranged on the surface of the stirring shaft (405), a sealing bearing (407) is arranged at the lower end of the stirring shaft (405), and the sealing bearing (407) is fixed to the bottom of the stirring tank (400).

6. A circulating device for dust removal of a spray tower (100) according to claim 5, characterized in that: An overflow groove (105) is arranged in the overflow port (201), and a sealing plate (106) is arranged on the left and right sides of the overflow groove (105).

7. A circulating device for dust removal of a spray tower (100) according to claim 6, characterized in that: The overflow pipe (401) is provided with a third valve (408), the top of the sedimentation tank (200) is provided with a first liquid level meter (504), and the top of the clean water tank (402) is provided with a second liquid level meter (505).

8. A circulating device for dust removal of a spray tower (100) according to claim 7, characterized in that: The bottom of the sedimentation tank (200) is communicated with a blowdown pipeline (204), and the blowdown pipeline (204) is provided with a fourth valve (205) at the liquid outlet end.

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