CN114288789B - A wet centrifugal dedusting device with adjustable pulse backwash - Google Patents

Abstract

The invention relates to a pulse-adjustable backwashing wet-type centrifugal dust removal device.A spray pump and an explosion-proof motor are fixed on the left side of a base frame, a circulating water tank is fixed on the right side of the base frame, and a dust removal air box is fixed above the circulating water tank; a dust removal nozzle is arranged at the air inlet of the dust removal air box; the centrifugal dust removal diaphragm and the dust removal filter diaphragm are vertically arranged in the dust removal air box, and a pulse cleaning nozzle is arranged at the air outlet of the dust removal air box; the pulse cleaning nozzle and the dust removing nozzle are arranged on the pipeline, and the dust removing spray nozzle pipeline and the pulse cleaning pipeline are connected to the output port of the spray pump through the spray flushing change-over valve; adjustable pulsed liquid accuse rotary valve is installed on the pulse cleaning pipeline, and control pulse cleaning nozzle produces certain pulse frequency's spraying, establishes the filter and the overflow filter that absorb water in the circulating water tank, and this device simple structure, the performance has the dust collection efficiency height more comprehensively, but the cyclic utilization water resource, and pressure reduction and operation maintenance cost are low, can reduce the air current temperature simultaneously.

Description

A wet centrifugal dedusting device with adjustable pulse backwash

technical field

The invention relates to the technical field of wet dust removal and dust reduction, in particular to a wet centrifugal dust removal device with adjustable pulse backwashing.

Background technique

A large amount of dust will be generated in underground mining of coal and other mine operations. The space in the mine is limited and the roadway is long and narrow, coupled with the limited ventilation conditions, it is likely to cause dust accumulation, which will deteriorate the operating conditions in the mine and cause dust accumulation. Concentration increases, resulting in downhole visibility and affecting production efficiency; in addition, dust particles such as coal powder with small particle size will cause varying degrees of wear and tear on underground mechanical equipment, shortening the service life of equipment; and suspended in the air If the fine particulate matter is not treated, it will seriously pollute the environment and endanger human health. Therefore, in order to achieve standard exhaust, it is necessary to treat the dusty gas from the source.

At present, the functionality of dust removal devices is relatively simple, and wet dust removal consumes more washing liquid (generally water), and the water for humidification cannot be recycled, resulting in waste of water resources; the utility model patent with the publication number CN213668468U "a Wet dust collection and dust removal device" is a dust removal device used to treat industrial exhaust gas containing smoke and dust. It can be used for high-temperature smoke and dust exhaust gas emission control, but this device only uses multiple groups of spray pipes to remove dust and does not use filter screens. , the functionality is relatively simple; the main disadvantage of wet dust removal is that it consumes more water resources. The device lacks improvements in water saving and still consumes a lot of water resources; High-efficiency wet dust collector", which uses upper and lower filter plates and rotating felt sleeves to absorb dust particles, and is equipped with a sprinkler, which has a high capture rate of dust particles; however, the ventilation volume of this dust collector is small , The large wind resistance is not suitable for the treatment of mine dusty waste gas, and the maintenance and replacement of the rotating felt sleeve is inconvenient, and the device cannot realize the convenient cleaning and maintenance of the filter screen, and the filter screen will cause blockage of the mesh during long-term use. If the filter screen cannot be cleaned in time and conveniently, the dust removal efficiency and ventilation volume will be significantly reduced.

Contents of the invention

In order to solve the above technical problems, the present invention provides a wet centrifugal dedusting device with adjustable pulse backwash, which can improve the capture rate of fine particles in the dusty gas, adopts two times of filtration to further improve the dedusting efficiency, and is equipped with a circulating water tank It can realize the recycling of sewage, use the adjustable pulse type hydraulic control rotary valve to control the pulse cleaning nozzle, generate adjustable pulse frequency spray, realize the cleaning of the dust filter membrane, and extend the operation and maintenance cycle of the dust removal equipment.

To achieve the above object, the present invention adopts the following technical solutions:

A wet centrifugal dedusting device with adjustable pulse backwashing, including an explosion-proof motor, a spray pump, a dust removal bellows, a circulating water tank, a base frame and a spray flushing switching valve; the dust removal bellows includes a bellows shell, a pulse cleaning nozzle, and a dust removal filter diaphragm , centrifugal dust removal diaphragm, dust removal nozzle, dust removal nozzle pipeline, adjustable pulse type hydraulic control rotary valve, valve body liquid outlet pipeline and pulse cleaning pipeline; the circulating water tank includes a box body, a drain valve, an overflow filter and Water absorption filter; the base frame is welded by standard channel steel, as the base of the whole device; the output shaft of the explosion-proof motor and the input shaft of the spray pump are connected through a coupling to realize power transmission; the spray pump and explosion-proof The motors are all fixed on the left side of the base frame; the circulating water tank is installed horizontally on the right side of the base frame, and the two are fixedly connected by welding; the dust removal air box is fixedly connected above the circulating water tank through a bolt assembly, and the gap between the connections is sealed The bottom of the bellows shell of the dust removal bellows is provided with a sewage discharge slot for drainage, leading to the circulating water tank; a dust removal filter diaphragm and a centrifugal dust removal diaphragm are arranged in the dust removal bellows, and the dust removal filter diaphragm and the centrifugal dust removal diaphragm are arranged in parallel in sequence, It is fixed in the dust removal air box perpendicular to the airflow direction; the centrifugal dust removal diaphragm is near the air inlet end; the dust removal filter diaphragm is installed at the air outlet end for secondary filtration and dust removal; the dust removal nozzle pipelines are symmetrically distributed in the dust removal air box The left and right sides of the air inlet are fixed vertically on the inner wall of the dust removal bellows; the dust removal nozzles are installed on the dust removal nozzle pipeline, and are evenly distributed so that the spray coverage is the entire air inlet; the pulse cleaning pipeline is divided into upper and lower rows. distribution, fixed on the inner wall of the dust removal bellows behind the dust removal filter diaphragm; the pulse cleaning nozzles are evenly distributed and fixed on the pulse cleaning pipeline, so that the spray coverage is the area of the entire dust removal filter diaphragm; the pulse cleaning pipeline passes through the adjustable pulse liquid The control rotary valve is connected with the spray flushing switching valve outside the dust removal bellows, and the spray flushing switching valve is connected with the output pipeline port of the spray pump. The liquid outlet of the pipeline leads to the circulating water tank; the spray flushing switching valve is a two-position four-way switching valve, which connects the output pipeline port of the spray pump, the dust removal nozzle pipeline and the pulse cleaning pipeline to realize pulse cleaning. The liquid supply reversing function of the pipeline and the dust removal nozzle pipeline.

A clapboard is vertically arranged in the circulating water tank, and the overflow filter is vertically embedded between the clapboard and the tank roof in the circulating water tank, separating the circulating water tank into two parts; the water-absorbing filter is close to the left side of the circulating water tank The bottom is connected to the end port of the water suction pipeline of the spray pump outside the circulating water tank; the right side of the circulating water tank is provided with a sewage valve, which is connected to the sewage outlet on the side wall of the circulating water tank. The sediment in the water tank can be discharged through the drain valve.

The centrifugal dedusting diaphragm is composed of a number of corrugated plates arranged in parallel and at intervals in a corrugated structure. The corrugated plates are made of reinforced polypropylene material with a corrugated shape, and the corrugations are arranged along the airflow direction and perpendicular to the horizontal plane.

The adjustable pulse type hydraulic control rotary valve includes an end cover, a liquid inlet, a liquid outlet, a valve core seat, a variable throttle valve, a valve core, a coupling, a front end cover of a valve seat, a valve seat, and a rear end of a valve seat Cover, gear I, bearing seat, gear II, positioning pin, liquid supply port and liquid discharge port; the gear I and gear II are installed in the bearing seat, positioned by the positioning pin, the bearing seat is installed in the valve seat, and the valve The front end cover of the seat and the rear end cover of the valve seat are respectively fixed to both ends of the valve seat by bolts, and positioned by positioning pins. The side wall of the valve seat is provided with a liquid supply port and a liquid discharge port. The liquid supply port and the liquid discharge port are symmetrical. Install a variable throttle valve, which is connected with the pulse cleaning pipeline to adjust the high-pressure liquid supply flow; the front end cover of the valve seat, the valve seat, the rear end cover of the valve seat, the gear I, the bearing seat, the gear II, the positioning pin and The liquid supply port constitutes the valve core driving device, which is used to drive the valve core to rotate; the valve core seat is fixed on the front end cover of the valve seat, and the side wall of the valve core seat is provided with a liquid inlet and a liquid outlet, and the liquid inlet and the liquid outlet are symmetrical. The spool is placed in the spool seat, and the spool seat is sealed with an end cover. A spool shaft is arranged inside the spool. The spool shaft and the shaft of the gear I are connected by a coupling to realize transmission. The spool moves along the direction of the spool shaft. Two side walls are symmetrical to each other, and the two sides are convex to match the valve core seat, and the other two sides are concave to facilitate liquid entry.

Adjustable pulse type hydraulic control rotary valve working principle:

The adjustable pulse type hydraulic control rotary valve is a hydraulically controlled valve with a certain on-off frequency function; when the pulse cleaning pipeline is connected with high-pressure fluid, one way flows through the valve body through the variable throttle valve to drive the gear to rotate; the other way It flows into the liquid inlet of the valve and produces a spray through the nozzle. The spool is driven by the gear shaft to rotate. When the spool hole is aligned with the liquid inlet, it starts to supply liquid to the pulse cleaning nozzle to generate spray; when the spool continues to rotate, the spool hole and the liquid inlet are misaligned, and the supply to the cleaning nozzle is stopped. The high-pressure fluid only flows into the valve body and flows out to the circulating water tank, driving the gear to rotate. This enables automatic control of the pulse cleaning nozzle operation. The pulse frequency of the adjustable pulse hydraulic control rotary valve is adjusted by the variable throttle valve, which can produce sprays with different pulse frequencies.

Compared with prior art, the beneficial effect that the present invention obtains:

(1) The centrifugal dedusting diaphragm adopts a corrugated diaphragm made of reinforced polypropylene material. When the coarse polymer formed by the condensation of larger particles of dust and water mist in the gas passes through the centrifugal dedusting diaphragm at a certain speed, the coarse aggregate Under the action of centrifugal force, the dust hits the diaphragm and flows down along the diaphragm wall to realize primary dust removal and mist removal; the small dust particles that are not captured pass through the centrifugal dust removal diaphragm and reach the dust removal filter diaphragm for secondary dust removal to achieve fine filtration , which can better solve the problem of affecting the dust removal efficiency due to the low capture rate of dust particles by water mist, and also has the effect of cooling;

(2) The pulse cleaning nozzle is adopted, and the range of the spray generated by the nozzle is the entire dust removal filter diaphragm. The adjustable pulse type hydraulic control rotary valve can control the pulse cleaning nozzle to produce a spray with a certain pulse frequency, and the impact force of the pulse spray can be used effectively. Clean the dust filter membrane, reduce the frequency of replacement of the dust filter membrane, reduce operation and maintenance costs, and enable the filter to be used for a long time and maintain a good filtering effect;

(3) The overflow filter in the circulating water tank can achieve the effect of filtering sewage. The sewage filtered by the overflow filter returns to the inlet of the spray pump, and then is filtered by the filter at the suction pipe port of the spray pump, and then is discharged by the spray pump. Recycling to reduce waste of water resources;

(4) Adjustable pulse type hydraulic control rotary valve is adopted, and the whole process is controlled by hydraulic pressure to reduce potential safety hazards.

Description of drawings

Fig. 1 is a schematic diagram of the internal structure of the device of the present invention;

Fig. 2 is the front view of device structure of the present invention;

Fig. 3 is the left view of device structure of the present invention;

Fig. 4 is the structural schematic diagram of the centrifugal dedusting diaphragm used in the device of the present invention;

Fig. 5 is the atomization range figure of the dedusting spray nozzle of the device of the present invention;

Fig. 6 is a structural schematic diagram of the adjustable pulse type hydraulic control rotary valve of the device of the present invention;

Fig. 7 is a sectional view of the adjustable pulse type hydraulic control rotary valve in the device of the present invention;

Fig. 8 is a schematic view of the valve core structure of the device of the present invention;

；1314-轴承座；1315-齿轮

；1316-定位销；14-吸水过滤器；15-阀体出液管路；16-喷雾冲洗转换阀；17-脉冲清洗管路。In the figure: 1-explosion-proof motor; 2-spray pump; 3-dust removal bellows; 4-pulse cleaning nozzle; 5-dust filter diaphragm; 6-centrifugal dust diaphragm; 7-dust nozzle; 8-dust nozzle pipeline; Circulating water tank; 10-drainage valve; 11-base frame; 12-overflow filter; 13-adjustable pulse hydraulic control rotary valve; 1301-end cover; 1302-liquid inlet; 1303-liquid supply port; 1304- Valve core seat; 1305-variable throttle valve; 1306-valve seat front cover; 1307-valve seat; 1308-valve seat rear end cover; 1309-drain port; 1310-liquid outlet; Coupling; 1313-Gear

;1314-bearing seat; 1315-gear

; 1316-locating pin; 14-absorbing filter; 15-valve body outlet pipeline; 16-spray flushing conversion valve; 17-pulse cleaning pipeline.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

As shown in Figures 1 to 5, a pulse-adjustable backwashing wet centrifugal dedusting device includes an explosion-proof motor 1, a spray pump 2, a dust removal bellows 3, a circulating water tank 9, a base frame 11, and a spray flushing conversion valve 16; The bellows 3 includes a bellows shell, a pulse cleaning nozzle 4, a dust removal filter diaphragm 5, a centrifugal dust removal diaphragm 6, a dust removal nozzle 7, a dust removal nozzle pipeline 8, an adjustable pulse type hydraulic control rotary valve 13, a valve body liquid outlet pipeline 15 and The pulse cleaning pipeline 17; the base frame 11 is welded by standard channel steel, as the base of the whole device; the output shaft of the explosion-proof motor 1 and the input shaft of the spray pump 2 are connected through a coupling to realize power transmission; the spray pump 2 and The explosion-proof motor 1 is fixed on the left side of the base frame 11; the circulating water tank 9 is installed horizontally on the right side of the base frame 11, and the two are fixedly connected by welding; the dust removal bellows 3 is fixedly connected on the top of the circulating water tank 9 through a bolt assembly, and the connecting gap Sealing treatment is carried out between them to prevent sewage leakage during work; the bottom of the bellows shell of the dust removal bellows 3 is provided with a sewage discharge slot for drainage, leading to the circulating water tank 9; the dust removal filter diaphragm 5 and the centrifugal dust removal diaphragm 6 are arranged in the dust removal bellows 3, Dust removal filter diaphragm 5 and centrifugal dust removal diaphragm 6 are arranged in parallel and spaced in turn, and are fixed in the dust removal bellows 3 perpendicular to the airflow direction; the centrifugal dust removal diaphragm 6 is at the end near the air inlet, and the centrifugal dust removal diaphragm is arranged in parallel and at intervals by several corrugated plates with a corrugated structure Composition, the corrugated plate is made of reinforced polypropylene material with corrugated shape, the corrugations are arranged along the airflow direction and perpendicular to the horizontal plane, the dust filter diaphragm 5 is at the air outlet end, used for secondary filter dust removal, and the dust removal nozzle pipeline 8 is symmetrically distributed On the left and right sides of the air inlet of the dust removal bellows 3, they are vertically fixed on the inner wall of the dust removal bellows 3; there are six dust removal nozzles 7, which are evenly and symmetrically distributed on the dust removal nozzle pipeline 8; the pulse cleaning pipeline 17 is distributed in two rows up and down , fixed on the inner wall of the dust removal bellows 3 behind the dust removal filter diaphragm 5; there are six pulse cleaning nozzles 4, which are evenly and symmetrically distributed on the pulse cleaning pipeline 17, and the pulse cleaning pipeline 17 passes through the adjustable pulse type hydraulic control rotary valve 13 and The spray flushing switching valve 16 outside the dust removal bellows 3 is connected, the spray flushing switching valve 16 is connected to the output pipeline port of the spray pump 2, the adjustable pulse type hydraulic control rotary valve 13 is connected to the valve body liquid outlet pipeline 15, and the valve body liquid outlet The liquid outlet of the pipeline 15 leads to the circulating water tank 9; the spray flushing switching valve 16 is a two-position four-way reversing valve, which connects the output pipeline port of the spray pump 2, the dust removal nozzle pipeline 8 and the pulse cleaning pipeline 17 to realize The liquid supply reversing function of the pulse cleaning pipeline 17 and the dust removal nozzle pipeline 8; through the centrifugal dust removal diaphragm, the coarse polymer is subjected to centrifugal force when it passes through, hits the diaphragm and flows down along the diaphragm wall, and realizes dust removal and fog removal at one time; Smaller dust particles that have not been captured reach the dust filter diaphragm for secondary dust removal to achieve fine filtration, effectively improve the dust removal efficiency, and also have the effect of cooling; the dust removal nozzles are evenly distributed on the dust removal nozzle pipeline, so that the spray coverage range is The entire air inlet increases the dust removal range; the adjustable pulse type hydraulic control rotary valve can effectively clean the dust removal filter by using the impact force of the pulse spray Diaphragm, reduce the frequency of replacement of dust filter membrane, reduce operation and maintenance costs, can make the filter use for a long time and maintain a good filtering effect.

The circulating water tank 9 includes a box body, a drain valve 10, an overflow filter 12 and a water absorption filter 14; a partition is vertically arranged in the circulating water tank 9, and the overflow filter 12 is vertically embedded in the partition and the top of the circulating water tank 9 Between them, the circulating water tank 9 is divided into two parts; the water suction filter 14 is connected to the end port of the suction pipeline of the spray pump 2 outside the circulating water tank 9 near the bottom left side of the circulating water tank 9; the right side of the circulating water tank 9 is provided with a drain valve 10, and The valve 10 is connected to the sewage outlet on the side wall of the circulating water tank 9, and the sewage outlet is located at the rear side wall of the circulating water tank 9 near the bottom of the tank. The sediment in the circulating water tank 9 can be discharged through the sewage valve 10; the sewage filtered by the overflow filter is returned to the The inlet of the spray pump is filtered by the suction filter at the suction pipe port of the spray pump, and then recycled by the spray pump to reduce the waste of water resources.

1313、轴承座1314、齿轮

1315和定位销1316；齿轮I 1313和齿轮II 1315安装在轴承座1314内，通过定位销1316定位，轴承座1314置于阀座1307内，阀座前端盖1306和阀座后端盖1308通过螺栓分别固定到阀座1307两端，通过定位销1316定位，阀座1307侧壁设供液口1303和排液口1309，供液口1303和排液口1309对称，在供液口1303上安装可变节流阀1305，可变节流阀1305与脉冲清洗管路17相连，可调节高压供液流量；供液口1303、阀座前端盖1306、阀座1307、阀座后端盖1308、排液口1309、齿轮I1313、轴承座1314、齿轮II 1315和定位销1316构成阀芯驱动装置，用于驱动阀芯1311转动；阀芯座1304固定在阀座前端盖1306上，阀芯座1304侧壁设进液口1302和出液口1310，进液口1302和出液口1310对称，阀芯1311置于阀芯座1304内，用端盖1301密封阀芯座1304，阀芯1311内设阀芯轴，阀芯轴和齿轮I 1313的轴通过联轴器1312连接，实现传动，阀芯1311沿阀芯轴方向的侧壁两两相互对称，两侧呈凸起与阀芯座1304相契合，另外两侧凹陷方便进液；通过可变节流阀调节高压供液流量来驱动齿轮泵产生不同转速，实现脉冲频率可调的喷雾。As shown in Figure 6-8, the adjustable pulse type hydraulic control rotary valve includes an end cover 1301, a liquid inlet 1302, a liquid supply port 1303, a valve core seat 1304, a variable throttle valve 1305, a valve seat front cover 1306, a valve seat 1307, valve seat rear cover 1308, drain port 1309, liquid outlet 1310, valve core 1311, coupling 1312, gear

1313, bearing seat 1314, gear

1315 and positioning pin 1316; gear I 1313 and gear II 1315 are installed in the bearing seat 1314, positioned by positioning pin 1316, the bearing seat 1314 is placed in the valve seat 1307, the valve seat front end cover 1306 and the valve seat rear end cover 1308 through the bolt They are respectively fixed to the two ends of the valve seat 1307 and positioned by the positioning pin 1316. The side wall of the valve seat 1307 is provided with a liquid supply port 1303 and a liquid discharge port 1309. The liquid supply port 1303 and the liquid discharge port 1309 are symmetrical. Variable throttle valve 1305, the variable throttle valve 1305 is connected with the pulse cleaning pipeline 17, which can adjust the high-pressure liquid supply flow; liquid supply port 1303, valve seat front cover 1306, valve seat 1307, valve seat rear end cover 1308, liquid discharge port 1309, gear I1313, bearing seat 1314, gear II 1315 and locating pin 1316 constitute the spool driving device, are used to drive spool 1311 to rotate; The liquid inlet 1302 and the liquid outlet 1310, the liquid inlet 1302 and the liquid outlet 1310 are symmetrical, the valve core 1311 is placed in the valve core seat 1304, the valve core seat 1304 is sealed with the end cover 1301, and the valve core shaft is arranged inside the valve core 1311 , the spool shaft and the shaft of the gear I 1313 are connected through a coupling 1312 to realize the transmission. The side walls of the spool 1311 along the direction of the spool axis are symmetrical to each other, and the two sides are raised to match the spool seat 1304. In addition The two sides are recessed to facilitate liquid intake; the variable throttle valve is used to adjust the high-pressure liquid supply flow to drive the gear pump to produce different speeds, and realize the spray with adjustable pulse frequency.

The working principle of the adjustable pulse type hydraulic control rotary valve: the adjustable pulse type hydraulic control rotary valve is a hydraulically controlled valve with a certain on-off frequency function; The flow valve 1305 flows through the valve body to drive two gears to rotate; the other way flows into the liquid inlet 1302 of the adjustable pulse type hydraulic control rotary valve 13, and the valve core 1311 is driven to rotate by the shaft of the gear I 1313. When the liquid inlet 1302 is reached, liquid is supplied to the pulse cleaning nozzle to generate spray; when the valve core 1311 continues to rotate, the hole of the valve core 1311 is misaligned with the liquid inlet 1302, and the liquid supply to the pulse cleaning nozzle is stopped, and the high-pressure liquid only flows into the valve body It flows out to the circulating water tank, and the pulse frequency of the adjustable pulse hydraulic control rotary valve is adjusted by the variable throttle valve at the liquid outlet, which can produce sprays with different pulse frequencies.

How the invention works:

Dust removal process: start the explosion-proof motor 1, drive the spray pump 2 to start working, the spray flushing switching valve 16 is in the position of supplying liquid to the dust removal nozzle pipeline 8; the dust-containing gas flows into the dust removal air box 3 from the air inlet, and passes through the dust removal spray nozzle 7 When the water mist net is formed, the dust particles are captured by the water mist, and the coarse polymer formed by condensing with the water mist passes through the centrifugal dust removal diaphragm 6 at a certain speed. Centrifugal dust removal diaphragm plate 6 and flows along the wall to the bottom of the dust removal bellows to filter larger dust particles and a large amount of water mist; uncaptured smaller particles of dust pass through the centrifugal dust removal diaphragm 6 to the dust removal filter diaphragm 5 for two Secondary dust removal to achieve fine filtration; the cleaning and maintenance of the dust removal filter diaphragm 5 is realized by the pulse cleaning nozzle 4 and the adjustable pulse type hydraulic control rotary valve 13, which can ensure the filtering effect of the filter screen for a long time. The sewage produced by two times of filtration is drained into the circulating water tank 9 through the sewage discharge slot, and the sewage in the circulating water tank 9 settles the soot particles by standing and settling, and the sediment can be discharged through the sewage valve 10. When the liquid level stored in the circulating water tank 9 reached the installation height of the overflow filter 12, the overflow filter 12 began to overflow filter the sewage, and the filtered water was filtered by the water absorption filter 14 and then reused by the spray pump 2. Ultimately achieve the purpose of efficient dust removal and recycling of water resources.

Reverse adjustable pulse cleaning: When the filter mesh of the dust removal filter diaphragm 5 is blocked, the explosion-proof motor 1 is started to drive the spray pump 2 to work, the spray flushing switching valve 16 is in the position of supplying liquid for the pulse cleaning pipeline 17, and the pulse cleaning Under the control of the adjustable pulse type hydraulic control rotary valve 13, the high-pressure fluid in the pipeline 17 makes the pulse cleaning nozzle 4 produce a spray with a certain pulse frequency and spray it on the dust removal filter diaphragm 5 to achieve the purpose of cleaning the dust removal diaphragm; if necessary, adjust The pulse frequency can be changed by adjusting the variable throttle valve 1305 to change the liquid supply flow rate and the rotation speed of the spool 1311, thereby changing the pulse frequency of the spray. The sewage produced by cleaning the filter screen can also be drained to the circulating water tank 9 through the sewage discharge slot, and then be recycled after being filtered by the overflow filter 12 and the water absorption filter 14. The dust particles in the sewage are left standing in the circulating water tank 9 to form precipitation can be discharged through the drain valve 10.

The described embodiment is only an embodiment of the device of the present invention, rather than all embodiments, just to better explain the principle and practical application of the present invention, for those skilled in the art, it can still understand Modifications to the technical solutions described in the foregoing embodiments, or equivalent replacement of some of the technical features, shall be included within the scope of protection of the present invention.

Claims (2)

1. A wet centrifugal dust collector with pulse adjustable back wash is characterized by comprising an explosion-proof motor (1), a spray pump (2), a dust collection air box (3), a circulating water tank (9), a base frame (11) and a spray washing conversion valve (16); the dust removal air box (3) comprises an air box shell, a pulse cleaning nozzle (4), a dust removal filtering diaphragm (5), a centrifugal dust removal diaphragm (6), a dust removal nozzle (7), a dust removal nozzle pipeline (8), an adjustable pulse type hydraulic control rotary valve (13), a valve body liquid outlet pipeline (15) and a pulse cleaning pipeline (17); the base frame (11) is formed by welding standard component channel steel and serves as a base of the whole device; the output shaft of the explosion-proof motor (1) is connected with the input shaft of the spray pump (2) through a coupler; the spray pump (2) and the explosion-proof motor (1) are fixed on the left side of the base frame (11); the circulating water tank (9) is horizontally arranged on the right side of the base frame (11), and the circulating water tank and the base frame are fixedly connected through welding; the dust removal air box (3) is fixedly connected above the circulating water tank (9) through a bolt assembly, and gaps between the connected air box and the circulating water tank are sealed; a sewage draining notch is formed in the bottom of the air box shell of the dust removing air box (3) for draining and is communicated with a circulating water tank (9); a dedusting filter diaphragm (5) and a centrifugal dedusting diaphragm (6) are arranged in the dedusting air box (3), the dedusting filter diaphragm (5) and the centrifugal dedusting diaphragm (6) are sequentially arranged in parallel at intervals and are fixed in the dedusting air box (3) perpendicular to the airflow direction, and the centrifugal dedusting diaphragm (6) is arranged at one end close to the air inlet; the dust removal filter membrane (5) is arranged at one end of the air outlet and is used for secondary filtration and dust removal; the dust removal nozzle pipelines (8) are symmetrically distributed at the left side and the right side of an air inlet of the dust removal air box (3) and are vertically fixed on the inner wall of the dust removal air box (3); the dust removal nozzles (7) are uniformly distributed on the dust removal nozzle pipeline (8), so that the whole air inlet is covered by spraying; the pulse cleaning pipelines (17) are distributed in an upper row and a lower row and are fixed on the inner wall of the dust removing air box (3) behind the dust removing filter membrane (5); the pulse cleaning nozzles (4) are uniformly distributed and fixed on the pulse cleaning pipeline (17), so that the spray coverage range is the area of the whole dedusting filter membrane; a pulse cleaning pipeline (17) is connected with a spray flushing change-over valve (16) outside the dust removal air box (3) through an adjustable pulse type hydraulic control rotary valve (13), the spray flushing change-over valve (16) is connected with an output pipeline port of the spray pump (2), a liquid outlet of the adjustable pulse type hydraulic control rotary valve (13) is connected with a valve body liquid outlet pipeline (15), and the valve body liquid outlet pipeline (15) is communicated with the circulating water tank (9); the spray washing conversion valve (16) is a two-position four-way reversing valve, and is used for connecting an output pipeline port of the spray pump (2), the dust removal nozzle pipeline (8) and the pulse cleaning pipeline (17) to realize the liquid supply reversing function of the pulse cleaning pipeline (17) and the dust removal nozzle pipeline (8);

the circulating water tank (9) comprises a tank body, a blowdown valve (10), an overflow filter (12) and a water absorption filter (14); a partition plate is vertically arranged in the circulating water tank (9), and the overflow filter (12) is vertically embedded between the partition plate and the top of the circulating water tank (9) to divide the circulating water tank (9) into two parts; the bottom of the water absorption filter (14) close to the left side of the circulating water tank (9) is connected with the tail end port of a water absorption pipeline of the spray pump (2) outside the circulating water tank; a drain valve (10) is arranged on the right side of the circulating water tank (9), the drain valve (10) is connected with a drain outlet on the side wall of the circulating water tank, and the drain outlet is positioned on the rear side wall of the circulating water tank close to the bottom of the tank;

the adjustable pulse type hydraulic control rotary valve (13) comprises an end cover (1301), a liquid inlet (1302), a liquid supply port (1303), a valve core seat (1304), a variable throttle valve (1305), a valve seat front end cover (1306), a valve seat (1307), a valve seat rear end cover (1308), a liquid discharge port (1309), a liquid outlet (1310), a valve core (1311), a coupling (1312), a gear I (1313), a bearing seat (1314), a gear II (1315) and a positioning pin (1316); the gear I (1313) and the gear II (1315) are mounted in a bearing seat (1314), the bearing seat (1314) is mounted in a valve seat (1307) and is positioned by a positioning pin (1316), a front end cover (1306) and a rear end cover (1308) of the valve seat are respectively fixed to two ends of the valve seat (1307) through bolts and are positioned by the positioning pin, a liquid supply port (1303) and a liquid discharge port (1309) are formed in the side wall of the valve seat (1307), the liquid supply port (1303) and the liquid discharge port (1309) are symmetrical to each other, a variable throttle valve (1305) is mounted on the liquid supply port (1303), and the variable throttle valve (1305) is connected with a pulse cleaning pipeline (17) and can adjust the high-pressure liquid supply flow rate; the liquid supply port (1303), the front end cover (1306) of the valve seat, the valve seat (1307), the rear end cover (1308) of the valve seat, the gear I (1313), the bearing seat (1314), the gear II (1315) and the positioning pin (1316) form a valve core driving device which is used for driving the valve core (1311) to rotate; the valve core seat (1304) is fixed on a valve seat front end cover (1306), a liquid inlet (1302) and a liquid outlet (1310) are formed in the side wall of the valve core seat (1304), the liquid inlet (1302) and the liquid outlet (1310) are symmetrical, the valve core (1311) is arranged in the valve core seat (1304), the valve core seat (1304) is sealed through the end cover (1301), a valve core shaft is arranged in the valve core (1311), the valve core shaft is connected with a shaft of a gear I (1313) through a coupler (1312) to achieve transmission, the valve core (1311) is symmetrical in pairs along the side wall of the valve core shaft direction, protrusions are formed on two sides of the valve core shaft and matched with the valve core seat (1304), and the two sides of the valve core shaft are recessed to facilitate liquid inlet.

2. A pulse-modulated backwash wet centrifugal separator device according to claim 1, characterized in that the centrifugal separator (6) is formed by a corrugated structure of corrugated plates arranged in parallel and spaced apart, the corrugated plates being made of a corrugated reinforced polypropylene material, the corrugations of which are arranged in the direction of the gas flow and perpendicular to the horizontal plane.

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