Spraying type water film guide plate multi-stage centrifugal dust removal device and spraying type water film guide plate multi-stage centrifugal dust removal method

Abstract

The invention relates to the technical field of ventilator dust removal, and discloses a spray type water film guide plate multi-stage centrifugal dust removal device and method.The device comprises a dust removal box, a surge-free dust removal centrifugal fan, a spray unit and a water film guide plate set, and the spray unit is arranged at an air inlet of the dust removal box in a sleeving mode for spray treatment; dust particles impact into the grooves of the water film guide plate group along the airflow direction under the action of inertia force and are mixed and gathered with water, and dust-water mixed liquid accelerates to flow downwards in the grooves to a flow collecting groove at the bottom of the dust removal box and is discharged under the action of gravity and dust gas velocity and parallel component of the grooves, so that the purpose of primary dust removal is achieved; and then the gas enters the centrifugal ventilator and rotates in the volute at a high speed, residual dust particles in the liquid and the gas are thrown to the inner wall of the volute main body at a high speed along the tangential direction of the airflow under the action of centrifugal inertia force and are discharged from the drainage pipes on the two sides of the outlet along the inner wall, so that the purpose of secondary dust removal is achieved, and the dust removal effect is improved.

Description

Technical Field

[0001] The invention relates to the technical field of dust removal for ventilators, and in particular to a spray-type water film guide plate multi-stage centrifugal dust removal device and method. Background Art

[0002] Generally, there are two ways to remove dust from the fully-mechanized excavation face and fully-mechanized mining face of underground mining, and during the construction of highway, railway, subway and other tunnels, namely dry dust removal or wet dust removal. Dry dust removal usually uses dry filter or bag dust removal, while wet dust removal usually uses water and dust to mix through a fan to capture and remove dust.

[0003] Although dry-type filtration dust removal has good dust removal effect, the airflow resistance of the filter screen gradually becomes larger as the dust becomes blocked, causing the power consumption of the matching fan to be large. As the flow resistance increases, it is very easy to cause the fan to enter stall and surge conditions, which in turn causes the fan to fail. In addition, the dry-type filtration dust collector is large in size, and the filter screen needs to be replaced frequently, which is difficult to maintain and has high maintenance costs.

[0004] Wet dust removal technology is a dust removal method that utilizes the contact and mixing of water mist and dust-laden airflow so that dust particles are captured by the water mist and settle. However, due to the high wind speed in the fan, general wet dust removal technology makes it impossible for the dust-laden gas to be fully mixed with the water mist, resulting in poor dust removal effect. Summary of the invention

[0005] In order to overcome the defects of the above-mentioned prior art, the purpose of the present invention is to provide a spray-type water film guide plate multi-stage centrifugal dust removal device and method to solve the problems of excessive power, large size, high noise, etc. of the dust removal fan in the prior art, and to enable the dust particles to fully contact with the spray, thereby effectively ensuring the technical problem of the dust removal effect.

[0006] The present invention is achieved through the following technical solutions: In the first aspect, the present invention provides a spray-type water film guide plate multi-stage centrifugal dust removal device, comprising a dust removal box, a surge-free dust removal centrifugal fan, a spray unit and a water film guide plate group; the dust removal box comprises a dust removal shell; a ventilation channel is arranged in the dust removal shell, wherein one end of the ventilation channel is an air inlet and the other end is an air outlet; the spray unit is sleeved in the dust removal shell and arranged close to the air inlet for spraying the dust gas entering the air inlet; the water film guide plate group is fixed in the ventilation channel, and the water film guide plate group is arranged in the ventilation channel A plurality of curved channels are formed in the channel; a collecting groove is provided at the inner bottom of the dust removal shell, and the collecting groove is located between the air inlet and the water film guide plate group, and is used to discharge the dust particles after the diversion; the non-surge dust removal centrifugal fan comprises a volute body and an impeller motor group; the inner cavity of the volute body is an annular guide channel, wherein an inlet is provided on the volute body, and the inlet is connected with the air outlet, and the bottom of the volute body is provided with an outlet through a volute tongue, and the gas discharge direction of the outlet is parallel to the ground; the impeller motor group is assembled on the volute body.

[0007] Preferably, the water film guide plate group includes a first water film guide plate unit and several rows of second water film guide plate units; the first water film guide plate unit and several rows of second water film guide plate units are arranged side by side in sequence along the flow direction of the dust gas in the ventilation channel, and the top ends of the first water film guide plate unit and several rows of second water film guide plate units are fixed on the inner top of the dust removal shell, and the bottom ends of the first water film guide plate unit and several rows of second water film guide plate units are fixed on the inner bottom of the dust removal shell.

[0008] Furthermore, the first water film guide plate unit includes a plurality of first water film guide tubes arranged in parallel, the first water film guide tubes are U-shaped tube columns, and there are gaps between adjacent first water film guide tubes; the second water film guide plate unit includes a plurality of second water film guide tubes arranged in parallel, the second water film guide tubes are U-shaped tube columns, and there are gaps between adjacent second water film guide tubes; the U-shaped openings of the first water film guide tube and the second water film guide tube are arranged opposite to each other.

[0009] Furthermore, several first water film guide tubes arranged in parallel and several second water film guide tubes arranged in parallel near the first water film guide tubes are all staggered; and several second water film guide tubes arranged in parallel in each row of second water film guide plate units are all staggered, and the gaps between the several first water film guide tubes are connected with the gaps between the several second water film guide tubes arranged in parallel to form a curved channel.

[0010] Preferably, a baffle is provided at the inner bottom of the dust removal shell, the two ends of the baffle are respectively fixed on the inner walls of the dust removal shell, and the baffle is provided with drainage holes, and the baffle is located between the air outlet and the water film guide plate group.

[0011] Preferably, the spray unit comprises a water delivery pipe and a water delivery ring; The water delivery ring is arranged in the dust removal shell and is arranged near the air inlet, wherein the ring diameter of the water delivery ring is arranged corresponding to the inner diameter of the dust removal shell; one end of the water delivery pipe is connected to the water delivery device, and the other end is connected to the water delivery ring through the outer wall of the dust removal shell; The water delivery ring is provided with a plurality of first nozzles and second nozzles in an annular direction; the plurality of first nozzles are located on one side of the ring body of the water delivery ring and the nozzles are arranged in the direction of the air inlet, and the plurality of second nozzles are located on the other side of the ring body of the water delivery ring and the nozzles are arranged in the direction of the water film guide plate group.

[0012] Preferably, the inlet of the volute body includes a first caliber end and a second caliber end, the first caliber end is connected to the air outlet, and the second caliber end is connected to the inner cavity of the volute body, the inner diameter of the first caliber end is larger than the inner diameter of the second caliber end, and the first caliber end and the second caliber end are connected in an arc surface.

[0013] Preferably, a water collecting plate is provided at the outlet of the volute body, and the two ends of the water collecting plate are respectively fixed at the inner walls on both sides of the outlet, and drainage pipes are respectively provided at the inner walls on both sides for discharging water stains in the water collecting plate. The water collecting plate is a U-shaped plate structure, wherein one edge of the water collecting plate is fixed to the inner bottom surface of the outlet, and there is a gap between the other edge and the inner bottom surface of the outlet, which is used to collect water stains flowing out along the outlet.

[0014] Preferably, it further comprises a bracket; the bracket comprises a box bracket and a fan bracket; The box support and the fan support are connected and arranged, the dust removal shell is mounted on the box support, and the volute body is mounted on the fan support; A sedimentation box is arranged in the box support, a sewage outlet is arranged on the top of the sedimentation box, and the collecting groove at the bottom of the dust removal shell is connected to the sewage outlet.

[0015] In a second aspect, the present invention further provides a method for multi-stage centrifugal dust removal using a spray-type water film guide plate, based on the above-mentioned multi-stage centrifugal dust removal device using a spray-type water film guide plate, comprising the following steps: Start the impeller motor unit, the volute body starts to work, and the dust gas is sucked into the volute body through the dust removal shell; When the dust gas enters the air inlet of the dust removal shell, it fully contacts with the spray water droplets output by the spray unit, and under the action of inertia force, it hits the first water film guide plate unit and several rows of second water film guide plate units in sequence along the airflow direction, wherein the dust gas carrying the spray water droplets is guided through the first water film guide plate unit and then enters several rows of second water film guide plate units in sequence, and the flow speed of the dust gas is gradually reduced in several rows of second water film guide plate units. At this time, the dust particles hit several rows of second water film guide plate units in sequence along the airflow direction under the action of inertia force, and gather with the spray water droplets; under the action of the gravity of the spray water droplets and the parallel component of the grooves of several rows of second water film guide plate units, the dust particles are guided along several rows of second water film guide plate units to the collecting groove at the inner bottom of the dust removal shell, and discharged through the collecting groove, completing the first-level dust removal; The gas after the first-level dust removal passes through several curved channels and is sucked into the volute body again through the air outlet, and rotates inside the volute body. The remaining dust particles in the liquid and gas are thrown to the inner wall of the volute body at high speed along the tangent direction of the air flow under the action of centrifugal inertia, and are discharged from the drainage pipes on both sides of the outlet along the inner wall of the volute body, completing the second-level dust removal.

[0016] Compared with the prior art, the present invention has the following beneficial technical effects: The present invention provides a multi-stage centrifugal dust removal device with a spray-type water film guide plate, in which a spray unit is sleeved in a dust removal shell and arranged close to an air inlet, so that the dust gas entering the air inlet can be effectively brought into full contact with the spray water droplets output by the spray unit, and the water film guide plate group is fixed in a ventilation channel, and a plurality of curved channels are formed in the ventilation channel, so that the dust gas can be effectively blocked, and the flow speed of the dust gas in the water film guide plate group is reduced, and the impurity particles in the dust gas after being fully in contact with the spray water droplets can be guided along the water film guide plate group to the collecting trough, and discharged through the collecting trough, thereby achieving The primary dust removal effect is achieved for impurity particles in dust gas; the inner cavity of the volute body is an annular guide channel, which sucks the gas after the primary dust removal into the annular guide channel, and the remaining impurities in the gas are thrown to the inner wall of the channel through the centrifugal force. The bottom of the volute body is provided with an outlet through the volute tongue, and the gas discharge direction of the outlet is parallel to the ground, so that the remaining impurities and spray water droplets can be discharged through the outlet along the inner wall, avoiding residual water stains in the volute body, and achieving the secondary dust removal effect on the remaining impurities in the gas. Without increasing the motor power of the wet dust collector, the dust removal effect is improved by utilizing the characteristics of the centrifugal fan. Furthermore, the water film guide plate group includes a first water film guide plate unit and several rows of second water film guide plate units; the first water film guide plate unit and several rows of second water film guide plate units are arranged in parallel in the ventilation channel along the flow direction of the dust gas, wherein the first water film guide plate unit mainly plays a guiding role, so that the dust gas enters the several rows of second water film guide plate units step by step; several rows of second water film guide plate units can better capture and gather the dust particles and spray droplets in the dust gas, and guide and discharge them, thereby greatly improving the primary dust removal efficiency; the top ends of the first water film guide plate unit and several rows of second water film guide plate units are fixed on the inner top of the dust removal shell, and the bottom ends of the first water film guide plate unit and several rows of second water film guide plate units are fixed on the inner bottom of the dust removal shell, thereby ensuring the stability of the first water film guide plate unit and several rows of second water film guide plate units fixed in the dust removal shell.

[0017] Furthermore, the first water film guide plate unit includes a plurality of first water film guide tubes arranged in parallel, the first water film guide tubes are U-shaped tube columns, and there are gaps between adjacent first water film guide tubes; the second water film guide plate unit includes a plurality of second water film guide tubes arranged in parallel, the second water film guide tubes are U-shaped tube columns, and there are gaps between adjacent second water film guide tubes; the first water film guide tube and the second water film guide tube are designed as U-shaped tube columns, which are conducive to forming a water film inside the tube columns and increasing the contact area between the dust particles and the water film; the U-shaped mouths of the first water film guide tube and the second water film guide tube are arranged opposite to each other, the back arc structure of the U-shaped tube column plays a guiding role, and the U-shaped groove of the U-shaped tube column facilitates the capture and aggregation of impurity particles and spray droplets in the dust gas, and guides and discharges them.

[0018] Furthermore, several first water film guide tubes arranged in parallel and several second water film guide tubes arranged in parallel near the first water film guide tubes are staggered, and several second water film guide tubes arranged in parallel in each row of second water film guide plate units are staggered, and the gaps between the several first water film guide tubes are connected with the gaps between the several second water film guide tubes arranged in parallel to form a curved channel, and the several curved ventilation channels formed facilitate the smooth flow of the gas after the first-level dust removal to the surge-free dust removal centrifugal fan.

[0019] Furthermore, a baffle is provided at the inner bottom of the dust removal shell, and both ends of the baffle are respectively fixed on the inner walls of the dust removal shell on both sides, and a drainage hole is provided on the baffle. The baffle is located between the air outlet and the water film guide plate group. The baffle can prevent the liquid dust particles guided to the inner bottom of the dust removal shell along the water film guide plate group from being sucked into the volute body again, and at the same time can buffer the water stains remaining between the air outlet and the water film guide plate group, and then discharge them to the collecting tank through the drainage hole.

[0020] Furthermore, the spray unit includes a water supply pipe and a water supply ring; the water supply ring is arranged in the dust removal shell and is close to the air inlet to facilitate the spraying of the dust gas entering the air inlet, wherein the ring diameter of the water supply ring is arranged corresponding to the inner diameter of the dust removal shell, so that the dust gas can fully contact with the spray water droplets; one end of the water supply pipe is connected to the water supply device, and the other end is connected to the water supply ring through the outer wall of the dust removal shell; the water supply ring is provided with a plurality of first nozzles and second nozzles in the annular direction; the plurality of first nozzles are located on one side of the ring body of the water supply ring and the nozzles are arranged in the direction of the air inlet, and the plurality of second nozzles are located on the other side of the ring body of the water supply ring and the nozzles are arranged in the direction of the water film guide plate group, and the plurality of first nozzles and the plurality of second nozzles respectively accelerate the contact efficiency between the dust particles and the spray water droplets, thereby facilitating the subsequent dust removal work.

[0021] Furthermore, the inlet of the volute body includes a first caliber end and a second caliber end, the first caliber end is connected to the air outlet, and the second caliber end is connected to the inner cavity of the volute body, the inner diameter of the first caliber end is larger than the inner diameter of the second caliber end, and the first caliber end and the second caliber end are connected in an arc surface, which plays a buffering role on the moisture in the gas passing through the air outlet, thereby preventing a large amount of moisture from flowing into the volute body.

[0022] Furthermore, a water collecting plate is provided at the outlet of the volute body, and both ends of the water collecting plate are respectively fixed at the inner walls on both sides of the outlet, and drainage pipes are respectively provided at the inner walls on both sides. The water collecting plate can effectively collect water stains flowing out along the inner wall of the volute body, and effectively discharge them through the drainage pipes on the inner walls on both sides. The water collecting plate has a U-shaped plate structure, wherein one edge of the water collecting plate is fixed to the inner bottom surface of the outlet, and there is a gap between the other edge and the inner bottom surface of the outlet, which can better gather water stains and prevent water stains from overflowing.

[0023] Furthermore, the box bracket and the fan bracket are connected, the dust collector shell is mounted on the box bracket, and the volute body is mounted on the fan bracket, thereby ensuring the working stability of the dust collector shell and the volute body. A sedimentation box is provided in the box bracket, and a sewage outlet is provided on the top of the sedimentation box. The collecting trough at the bottom of the dust collector shell is connected to the sewage outlet, which can effectively collect the impurity particles discharged through the collecting trough.

[0024] The present invention also provides a multi-stage centrifugal dust removal method with a spray-type water film guide plate. In the first-stage dust removal, impurity particles are gathered with spray water droplets in a first water film guide plate unit and several rows of second water film guide plate units by inertial force, and under the action of gravity and the parallel component of the dust gas velocity and the grooves of several rows of second water film guide plate units, the dust particles are guided and discharged along the several rows of second water film guide plate units, thereby achieving dust removal efficiency; in the second-stage dust removal, the remaining impurity particles are thrown to the inner wall of the annular guide channel of the volute main body at high speed by the action of centrifugal force in the volute main body, and are discharged from the outlet along the inner wall with the spray water droplets, thereby achieving further dust removal efficiency and improving the dust removal effect in the entire process. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the structure of the device in the embodiment of the present invention; Figure 2 is a side view of a device in an embodiment of the present invention; Figure 3 for Figure 2 Sectional view of part A; Figure 4 for Figure 3 Sectional view of part B; Figure 5 is a front view of the device in an embodiment of the present invention; Figure 6 for Figure 5 Sectional view of part C in the middle; Figure 7 for Figure 5 Sectional view of part D in the middle; Figure 8 for Figure 7 The enlarged schematic diagram of the middle G part; Fig. 9 for Figure 3 Sectional view of part E; Fig.10 for Figure 3 The enlarged schematic diagram of part F in the middle; Fig.11 A schematic diagram of the structure of a turbine housing in an embodiment of the present invention; Fig.12 This is a front view of a water film guide plate assembly in an embodiment of the present invention; Fig.13 for Fig.12 Velocity decomposition diagram of dust gas in the water film guide plate group in the middle G part; Fig.14 It is a physical diagram of the water film guide plate assembly in an embodiment of the present invention; Fig.15 Schematic diagram of the flow of dust gas in the water film guide plate group according to an embodiment of the present invention; Fig.16A first simulated pressure distribution cloud diagram of dust gas in the water film guide plate group in an embodiment of the present invention; Fig.17 A second simulated pressure distribution cloud diagram of dust gas in the water film guide plate group in an embodiment of the present invention; Fig.18 This is a first simulated streamline distribution diagram of dust gas in the water film guide plate group in an embodiment of the present invention; Fig.19 A second simulated streamline distribution diagram of dust gas in the water film guide plate group in an embodiment of the present invention; Fig. 20 The third simulation streamline distribution diagram of dust gas in the water film guide plate group in the embodiment of the present invention; In the figure: 1. dust removal box; 2. non-surge dust removal centrifugal fan; 3. bracket; 4. sedimentation box; 5. spray unit; 6. water film guide plate group; 11. dust removal shell; 12. air inlet; 13. air outlet; 14. inspection door; 15. collecting trough; 16. baffle; 17. drainage hole; 21. volute body; 22. inlet; 23. outlet; 24. motor; 25. water collecting plate; 26. drainage pipe; 27. impeller; 31. box bracket; 32. fan bracket; 41. overflow pipe; 42. sewage pipe; 43. sewage outlet; 51. water pipe; 52. water ring; 53. first nozzle; 54. second nozzle; 61. first water film guide plate unit; 62. second water film guide plate unit; 611. first water film guide pipe; 621. second water film guide pipe. DETAILED DESCRIPTION

[0026] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme of the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings of the embodiment of the present invention. Obviously, the described embodiment is only a part of the embodiment of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0027] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0028] The purpose of the present invention is to provide a spray-type water film guide plate multi-stage centrifugal dust removal device and method to solve the problems of excessive power, large size, high noise, etc. of the dust removal fan in the prior art, and to enable dust particles to fully contact with the spray, thereby effectively ensuring the technical problem of dust removal effect.

[0029] The present invention is further described in detail below in conjunction with the accompanying drawings: Example 1 See also Figure 1 As shown, in one embodiment of the present invention, a spray-type water film guide plate multi-stage centrifugal dust removal device is provided, including a dust removal box 1, a non-surge dust removal centrifugal fan 2, a spray unit 5 and a water film guide plate group 6.

[0030] The dust removal box 1 includes a dust removal housing 11; one end of the dust removal housing 11 is an air inlet 12, and the other end is an air outlet 13, and the air inlet 12 and the ventilation channel in the dust removal housing 11 and the air outlet 13 are all arranged on the same axis, such as Figure 3 and Figure 5 shown.

[0031] The spray unit 5 is mounted in the dust removal housing 11 and is disposed near the air inlet 12 to spray the dust gas entering the air inlet 12. Figure 2 shown.

[0032] The water film guide plate group 6 is fixed in the ventilation channel. When the dust removal fan is working, several rows of guide dust removal plates with curved ventilation channels play a role in capturing and guiding dust. When the dust collector is running, the mixed gas enters the water film guide plate group 6. The first water film guide plate unit 61 mainly plays a role in guiding, thereby reducing the resistance of the mixed gas. From the second water film guide plate unit 62, the dust capture function begins. When the mixed gas enters several second water film guide plate units 62, the water and dust particles therein collide with the guide dust removal plate under the action of inertia and are captured, while the remaining continuous gas containing some dust can enter the next layer of water film guide plates, repeating the working principle of the previous layer of water film guide plates, until most of the dust particles and water are captured on the water film guide plates, and the dust-containing mixed liquid flows along the guide channel of the guide plate to the bottom of the dust removal box 1 and gathers, thereby draining to the outside of the dust removal box 1.

[0033] A collecting groove 15 is provided at the inner bottom of the dust removal housing 11. The collecting groove 15 is located between the air inlet 12 and the water film guide plate group 6 and is used to discharge the dust particles after the guide.

[0034] The surge-free dust-removing centrifugal fan 2 includes a volute body 21 and an impeller motor unit; the inner cavity of the volute body 21 is a circular guide channel, wherein an inlet 22 is provided on the volute body 21, and the inlet 22 is connected to the air outlet 13, and the bottom of the volute body 21 is provided with an outlet 23 through a volute tongue, and the gas discharge direction of the outlet 23 is parallel to the ground; the impeller motor unit is assembled on the volute body 21.

[0035] The principle of this embodiment is as follows: The dust gas enters the ventilation channel in the dust removal shell 11 through the air inlet 12 of the dust removal box 1. The spray unit 5 is arranged near the air inlet 12. When the dust gas enters, the spray unit 5 sprays it so that the dust particles are fully in contact with the water droplets, increasing the humidity and weight of the dust particles, and preparing for the subsequent dust removal process; the water film guide plate group 6 is fixed in the ventilation channel to form several rows of guide dust removal plates with curved ventilation channels. These guide dust removal plates not only reduce the flow speed of the dust gas in the ventilation channel, but also allow the dust gas after spraying to be mixed and guided in the guide dust removal plate. The dust particles come into contact with the water film during the flow process, and are further moistened and captured. In the ventilation channel, the dust particles are affected by the water film and the guide dust removal plate, and gradually deposit and adhere to the guide dust removal plate or fall into the collecting trough 15 at the bottom with the water flow. The gas after dust removal enters the volute body 21 of the surge-free dust removal centrifugal fan 2 through the air outlet 13. The impeller motor unit of the surge-free dust removal centrifugal fan 2 drives the impeller to rotate, generating centrifugal force to suck the gas from the inlet 22 of the volute body 21. Under the action of centrifugal force, the remaining particles in the gas are thrown at high speed along the direction of the air flow to the inner wall of the annular guide channel of the volute body 21, and are discharged along the inner wall through the outlet 23 with the spray droplets, thereby further improving the dust removal efficiency. The gas discharge direction is parallel to the ground, which is beneficial to reduce the resistance during discharge.

[0036] Specifically, according to Figure 3 As shown, the water film guide plate group 6 includes a first water film guide plate unit 61 and several rows of second water film guide plate units 62; the first water film guide plate unit 61 and several rows of second water film guide plate units 62 are arranged in parallel in the ventilation channel along the flow direction of the dust gas, and the top ends of the first water film guide plate unit 61 and several rows of second water film guide plate units 62 are fixed on the inner top of the dust removal shell 11, and the bottom ends of the first water film guide plate unit 61 and several rows of second water film guide plate units 62 are fixed on the inner bottom of the dust removal shell 11; a plurality of gaps are provided in the first water film guide plate unit 61 and several rows of second water film guide plate units 62, and a plurality of curved ventilation channels are formed by the plurality of gaps.

[0037] The principle of this embodiment is as follows: The first water film guide plate unit 61 and several rows of second water film guide plate units 62 are arranged at an angle in the ventilation channel. The simulation analysis shows that the angle of inclination can drive the water-dust mixture in the grooves of the first water film guide plate unit 61 and several rows of second water film guide plate units 62 to be quickly discharged to the collecting groove 15, so as to be quickly discharged to the outside of the dust removal box 1. In this embodiment, the first water film guide plate unit 61 is a guide row, and several rows of second water film guide plate units 62 are dust removal rows. According to the experimental results, the resistance loss of each row of second water film guide plate units 62 is about 1000 Pa, so that the impurity particles can be more fully contacted on several rows of second water film guide plate units 62.

[0038] according to Fig.12 , Fig.13 and Fig.14 As shown in the figure, the inclined water film guide plate group 6 is shown in the figure, and the speed V of the dust gas entering the dust removal box 1 can be decomposed into a speed component V perpendicular to the water film guide plate group 6 v and parallel component V h . Parallel component V h Under the combined effect of gravity, the mixture of dust gas and spray water droplets is accelerated to flow downward along the inside of the water film guide plate group 6 into the collecting trough 15, and then discharged from the collecting trough 15 to the outside of the dust removal box 1, wherein the purpose of the inclination angle is to utilize gravity and the velocity of the incoming gas and the downward parallel velocity component of the guide plate to accelerate the discharge of the water-dust mixture in the channel.

[0039] according to Fig.16 , Fig.17 , Fig.18 , Fig.19 and Fig. 20 The simulation analysis pressure distribution cloud and simulation streamline distribution diagram are shown; in addition to determining the U-shaped row resistance loss and the volume flow rate of the airflow passing through, which serves as the design basis for centrifugal secondary dust removal, the simulation analysis also shows that once the mixed liquid of dust gas and spray droplets enters the U-shaped groove, it flows rapidly downward and cannot overflow from the U-shaped groove again, thereby improving the effectiveness of the dust removal device.

[0040] Among them, according to Figure 4 As shown, the first water film guide plate unit 61 includes a plurality of first water film guide tubes 611 arranged in parallel, the first water film guide tubes 611 are U-shaped tube columns, and there are gaps between adjacent first water film guide tubes 611; the second water film guide plate unit 62 includes a plurality of second water film guide tubes 621 arranged in parallel, the second water film guide tubes 621 are U-shaped tube columns, and there are gaps between adjacent second water film guide tubes 621; the U-shaped openings of the first water film guide tubes 611 and the second water film guide tubes 621 are arranged opposite to each other.

[0041] The principle of this embodiment is as follows: The first water film guide tube 611 and the second water film guide tube 621 are designed as U-shaped pipe columns. This structure effectively reduces the ventilation resistance of dust gas entering the water film guide plate group. There are gaps between adjacent first water film guide tubes 611 and adjacent second water film guide tubes 621. These gaps allow dust gas to pass through and form a curved ventilation channel, thereby slowing down the gas flow rate and increasing the chance of dust particles depositing. Since the second water film guide plate unit 62 is located after the first water film guide plate unit 61, dust is captured starting from the second water film guide plate unit 62.

[0042] Among them, according to Figure 4 As shown, several first water film guide tubes 611 arranged in parallel and several second water film guide tubes 621 arranged in parallel near the first water film guide tubes 611 are all staggered; and several second water film guide tubes 621 arranged in parallel in each row of second water film guide plate units 62 are all staggered, and the gaps between the several first water film guide tubes 611 are connected to the gaps between the several second water film guide tubes 621 arranged in parallel to form a curved channel.

[0043] The principle of this embodiment is as follows: The staggered arrangement requires the dust gas to constantly change its flow direction when passing through the guide tube, thereby increasing the contact area between the dust particles and the water film and the inner wall of the guide tube. This increased contact area is conducive to the capture and deposition of dust particles.

[0044] The mass of the solid particles in the spray water droplets and dust gas is greater than the mass of the gas. When the gas-liquid-solid mixture flows through the curved channel, the spray water droplets and solid particles maintain their original direction of movement, while the gas can change direction, so that the spray water droplets and solid particles are separated from the gas, and the spray water droplets and solid particles are accumulated in the grooves of the water film guide plate group 6, such as Fig.15 As shown, the gas flow rate in the groove is close to zero, so once the spray droplets and solid particles enter the groove, they will not be carried out of the groove by the high-speed airflow, and can only converge to the collecting groove 15 at the bottom of the dust removal shell 11 under the action of gravity.

[0045] Specifically, according to Fig. 9 As shown, a baffle 16 is provided at the inner bottom of the dust removal shell 11, and the two ends of the baffle 16 are respectively fixed on the inner walls of the dust removal shell 11 on both sides, and a drainage hole 17 is provided on the baffle 16. The baffle 16 is located between the air outlet 13 and the water film guide plate group 6.

[0046] The principle of this embodiment is as follows: The baffle 16 can prevent the liquid dust particles guided to the inner bottom of the dust removal shell 11 along the water film guide plate group 6 from being sucked into the volute body 21 again, and at the same time can buffer the water stains remaining between the air outlet 13 and the water film guide plate group 6, and then discharge them to the collecting tank 15 through the drainage hole 17.

[0047] Specifically, according to Figure 6 and Fig.10 As shown, the spray unit 5 includes a water delivery pipe 51 and a water delivery ring 52 .

[0048] The water supply ring 52 is sleeved in the dust removal shell 11 and is arranged close to the air inlet 12, wherein the ring diameter of the water supply ring 52 is arranged corresponding to the inner diameter of the dust removal shell 11; one end of the water supply pipe 51 is connected to the water supply device, and the other end is connected to the water supply ring 52 through the outer wall of the dust removal shell 11.

[0049] The water supply ring 52 is provided with a plurality of first nozzles 53 and second nozzles 54 in a ring direction; the plurality of first nozzles 53 are located on one side of the ring body of the water supply ring 52 and the nozzles are arranged in the direction of the air inlet 12, and the plurality of second nozzles 54 are located on the other side of the ring body of the water supply ring 52 and the nozzles are arranged in the direction of the water film guide plate group 6.

[0050] The principle of this embodiment is as follows: The water pipe 51 serves as a water transmission channel, one end of which is connected to an external water delivery device, which may be a water pump or a water tank, and the other end of which is connected to the water delivery ring 52 through the outer wall of the dust removal shell 11. The water pipe 51 is responsible for stably delivering the mixed liquid to the spray system. The water delivery ring 52 is an annular structure, which is sleeved inside the dust removal shell 11 and arranged close to the air inlet 12. The ring diameter of the water delivery ring 52 matches the inner diameter of the dust removal shell 11 to ensure that the water mist can be evenly sprayed in the entire ventilation channel. The first nozzle 53 and the second nozzle 54 are respectively located on both sides of the ring body of the water delivery ring 52, and there are several of them. The nozzle of the first nozzle 53 is aimed at the direction of the air inlet 12, and is mainly used for spraying at the initial stage when the dust gas enters the dust removal device, so that the dust particles can be moistened in the initial stage. The nozzle of the second nozzle 54 is directed toward the water film guide plate group 6 to continue spraying the dust gas that has undergone preliminary dust removal, so as to further increase the wetting degree and deposition effect of the dust particles.

[0051] Specifically, according to Figure 3 and Figure 6 As shown, the inlet 22 of the volute body 21 includes a first caliber end and a second caliber end, the first caliber end is connected to the air outlet 13, and the second caliber end is connected to the inner cavity of the volute body 21, the inner diameter of the first caliber end is larger than the inner diameter of the second caliber end, and the first caliber end and the second caliber end are connected in an arc surface.

[0052] The principle of this embodiment is as follows: The first caliber end is connected to the air outlet 13, has a larger inner diameter, and serves as a pre-expansion section before the fluid enters the volute body 21; the second caliber end is connected to the inner cavity of the volute body 21, has a smaller inner diameter, and is the key part where the fluid actually enters the volute body 21 and generates a rotating flow. The first caliber end and the second caliber end have a smooth transition through an arc surface to reduce resistance and vortex generation during fluid flow.

[0053] Specifically, according to Figure 5 and Fig.11 As shown, a water collecting plate 25 is provided at the outlet 23 of the volute body 21. The two ends of the water collecting plate 25 are respectively fixed at the inner walls on both sides of the outlet 23, and drainage pipes 26 are respectively provided at the inner walls on both sides for draining the water stains in the water collecting plate 25. The water collecting plate 25 is a U-shaped plate structure. Figure 7 and Figure 8 As shown, one side edge of the water collecting plate 25 is fixed to the inner bottom surface of the outlet 23 , and there is a gap between the other side edge and the inner bottom surface of the outlet 23 for collecting water stains flowing out along the outlet 23 .

[0054] The principle of this embodiment is as follows: The water collecting plate 25 is designed in a U-shape, and this structure helps to effectively collect and gather water stains flowing out along the outlet 23. Under the action of gravity and the flow inside the volute, the water stains will flow along the inner wall of the volute to the water collecting plate 25. One side edge of the water collecting plate 25 is fixed to the inner bottom surface of the outlet 23 to ensure that it is stable and does not shake; while the other side edge maintains a certain gap with the inner bottom surface of the outlet 23. This gap serves as a gathering area for water stains and can accommodate and temporarily store a certain amount of water stains. Drainage pipes 26 are respectively provided on the inner walls on both sides of the water collecting plate 25. These drainage pipes 26 are responsible for discharging the water stains gathered in the water collecting plate 25 in a timely manner to prevent excessive accumulation of water stains and damage to the volute body 21 or other components.

[0055] Specifically, the impeller motor unit in this embodiment includes a motor 24 and an impeller 27 .

[0056] The impeller 27 is arranged and assembled in the volute body 21 , the motor 24 is located outside the volute body 21 , and the driving end of the motor 24 is connected to the center position of the impeller 27 .

[0057] The principle of this embodiment is as follows: The working principle of the impeller motor unit mainly involves the motor 24 driving the impeller 27 to rotate, thereby achieving the suction, compression and discharge of dust gas. The motor 24 is located outside the volute body 21 to prevent the motor 24 from contacting water stains in the volute body 21, thereby affecting the normal operation of the motor 24, and at the same time facilitates installation, maintenance and heat dissipation.

[0058] In this embodiment, the design of the non-surge dust removal centrifugal fan 2 for secondary dust removal is as follows: The remaining particles are thrown to the inner wall of the volute body 21 by the action of centrifugal force. This is based on the centrifugal force principle in airflow dynamics. By rationally designing the shape and size of the volute body 21, the effect of the centrifugal force can be maximized, thereby improving the dust removal efficiency. The design basis of the volute body 21 is to ensure that the airflow can pass smoothly and generate sufficient centrifugal force to improve the dust removal effect.

[0059] Specifically, the present embodiment also includes a bracket 3; the bracket 3 includes a box bracket 31 and a fan bracket 32; the box bracket 31 and the fan bracket 32 ​​are connected, the dust removal shell 11 is mounted on the box bracket 31, and the volute body 21 is mounted on the fan bracket 32; a sedimentation box 4 is provided in the box bracket 31, and a sewage outlet 43 is opened on the top of the sedimentation box 4, and the collecting trough 15 at the bottom of the dust removal shell 11 is connected to the sewage outlet 43.

[0060] The principle of this embodiment is as follows: The box support 31 and the fan support 32 are used to support the dust removal housing 11 and the volute body 21 respectively. A sedimentation box 4 is arranged in the box support 31. During the dust removal process, a certain amount of dust-containing sewage will accumulate at the bottom of the dust removal housing 11, and the sewage will flow into the sedimentation box 4 through the collecting trough 15.

[0061] In this embodiment, an overflow pipe 41 and a sewage pipe 42 are further provided on the side wall of the sedimentation box 4 , which can effectively discharge the sewage in the sedimentation box 4 .

[0062] In this embodiment, a maintenance opening is further provided on the side wall of the dust removal housing 11 corresponding to the water film guide plate group 6 , and a maintenance door 14 is provided on the upper cover of the maintenance opening, through which the water film guide plate group 6 can be easily maintained and cleaned.

[0063] In summary, the present invention provides a spray-type water film guide plate multi-stage centrifugal dust removal device, in which the spray unit 5 is sleeved in the dust removal shell 11 and is arranged close to the air inlet 12, which can effectively make the dust gas entering the air inlet 12 fully contact with the spray water droplets output by the spray unit 5, fix the water film guide plate group 6 in the ventilation channel, and form a plurality of rows of guide dust removal plates with curved ventilation channels in the ventilation channel, which can effectively capture the dust gas, and at the same time, can guide the impurity particles in the dust gas that is fully in contact with the spray water droplets along the water film guide plate group 6 to the collecting groove 15, and pass through the collecting groove 15 The volute body 21 is provided with an outlet 23 through a volute tongue, and the gas discharge direction of the outlet 23 is parallel to the ground, so that the remaining impurities and the spray water droplets can be discharged along the inner wall through the outlet 23, thereby avoiding residual water stains in the volute body 21, achieving the secondary dust removal effect on the remaining impurities in the gas, and effectively improving the dust removal effect on the impurity particles in the dust gas.

[0064] Example 2 This embodiment 2 provides a method for multi-stage centrifugal dust removal using a spray-type water film guide plate, based on the above-mentioned multi-stage centrifugal dust removal device using a spray-type water film guide plate, comprising the following steps: The impeller motor unit is started, and the volute body 21 starts to work, and the dust gas is sucked into the volute body 21 through the dust removal shell 11.

[0065] When the dust gas enters the air inlet 12 of the dust removal shell 11, it fully contacts the spray droplets output by the spray unit 5, and under the action of inertia, it hits the first water film guide plate unit 61 and several rows of second water film guide plate units 62 in sequence along the airflow direction, wherein the dust gas carrying the spray droplets is guided by the first water film guide plate unit 61 and then enters several rows of second water film guide plate units 62 in sequence, and the flow velocity of the dust gas is gradually reduced in the several rows of second water film guide plate units 62. At this time, under the action of inertia, the dust particles hit the several rows of second water film guide plate units 62 in sequence along the airflow direction and gather with the spray droplets. Under the action of gravity and the parallel component of the dust gas velocity and the grooves of several rows of second water film guide plate units 62, the dust particles are guided along the several rows of second water film guide plate units 62 to the collecting groove 15 at the inner bottom of the dust removal shell 11, and are discharged through the collecting groove 15, completing the first-level dust removal.

[0066] The gas after the first-level dust removal passes through the curved ventilation channel between the first water film guide plate unit 61 and several rows of second water film guide plate units 62, and is sucked into the volute body 21 again through the air outlet 13, and rotates at a high speed in the volute body 21. The remaining dust particles in the liquid and gas are thrown to the inner wall of the volute body 21 at a high speed along the tangent direction of the air flow under the action of centrifugal inertia, and are discharged from the drainage pipes 26 on both sides of the outlet 23 along the inner wall of the volute body 21, completing the second-level dust removal.

[0067] To summarize, the spray-type water film guide plate multi-stage centrifugal dust removal method provided in this embodiment utilizes multi-stage blocking walls and inertial force to separate the mixture of particles and liquid particles in the gas in the first stage of dust removal, and gathers them in the solid wall water film groove within the water film guide plate group 6 of the designed involved, and in the groove, the downward component of the gas velocity parallel to the groove channel is rapidly drained to the collecting groove 15 of the dust removal box 1, and then led to the outside of the dust removal box 1.

[0068] Secondly, in the secondary dust removal, dust particles with good followability will still enter the non-surge dust removal centrifugal fan 2 with the gas and water mist particles. These dust particles rotate with the gas at high speed in the volute body 21 through the impeller 27 of the non-surge dust removal centrifugal fan 2, and are thrown to the solid wall of the volute body 21 again under the action of the high-speed rotating centrifugal inertia force. Under the action of the air flow velocity and the shear stress of the solid wall, a water-dust particle mixture is formed on the solid wall, which flows along the wall to the outlet 23. The outlet 23 is provided with a water collecting plate 25 and a drainage pipe 26, and guides the sewage to be discharged from the outside of the fan, so that the gas discharged by the non-surge dust removal centrifugal fan 2 can minimize the particulate pollutants. The impeller 27 is specially designed, and in addition to having wear-resistant blade performance, it also has anti-surge working characteristics.

[0069] Another notable feature of the present embodiment is energy saving and maintenance-free. Since there are no wearing parts and consumables, there is no need for regular maintenance and replacement of filter consumables similar to dry dust removal during use. The driving power of the currently widely used dry dust removal filter is 90-180 kilowatts, while the power of the surge-free dust removal centrifugal fan 2 used in the present embodiment can be selected to be 15-30 kilowatts. Under the same noise pollution control conditions, the dust removal device in the present embodiment is 20-30 decibels lower than the A sound level noise of similar dry filter dust collectors.

[0070] Finally, it should be noted that the above content is only for illustrating the technical idea of ​​the present invention and cannot be used to limit the protection scope of the present invention. Any changes made on the basis of the technical solution in accordance with the technical idea proposed by the present invention shall fall within the protection scope of the present invention.

Claims

1. A spray-type water film guide plate multi-stage centrifugal dust removal device, characterized in that: It comprises a dust removal box (1), a non-surge dust removal centrifugal fan (2), a spray unit (5) and a water film guide plate group (6); The dust removal box (1) comprises a dust removal shell (11); a ventilation channel is provided in the dust removal shell (11), wherein one end of the ventilation channel is an air inlet (12) and the other end is an air outlet (13); The spray unit (5) is sleeved in the dust removal housing (11) and is arranged close to the air inlet (12), and is used to spray the dust gas entering the air inlet (12); The water film guide plate group (6) is fixed in the ventilation channel, and the water film guide plate group (6) forms a plurality of curved channels in the ventilation channel; a collecting groove (15) is provided at the inner bottom of the dust removal housing (11), and the collecting groove (15) is located between the air inlet (12) and the water film guide plate group (6) and is used to discharge the dust particles after the guide; The non-surge dust removal centrifugal fan (2) comprises a volute body (21) and an impeller motor unit; the inner cavity of the volute body (21) is a circular flow guide channel, wherein the volute body (21) is provided with an inlet (22), the inlet (22) is connected to the air outlet (13), the bottom of the volute body (21) is provided with an outlet (23) via a volute tongue, and the gas discharge direction of the outlet (23) is parallel to the ground; the impeller motor unit is mounted on the volute body (21).

2. A spray-type water film guide plate multi-stage centrifugal dust removal device according to claim 1, characterized in that: The water film guide plate group (6) comprises a first water film guide plate unit (61) and a plurality of rows of second water film guide plate units (62); the first water film guide plate unit (61) and the plurality of rows of second water film guide plate units (62) are arranged in sequence in parallel in the ventilation channel along the flow direction of the dust gas, and the top ends of the first water film guide plate unit (61) and the plurality of rows of second water film guide plate units (62) are fixed to the inner top of the dust removal shell (11), and the bottom ends of the first water film guide plate unit (61) and the plurality of rows of second water film guide plate units (62) are fixed to the inner bottom of the dust removal shell (11).

3. A spray-type water film guide plate multi-stage centrifugal dust removal device according to claim 2, characterized in that: The first water film guide plate unit (61) comprises a plurality of first water film guide tubes (611) arranged in parallel, the first water film guide tubes (611) being U-shaped tube columns, and gaps being present between adjacent first water film guide tubes (611); the second water film guide plate unit (62) comprises a plurality of second water film guide tubes (621) arranged in parallel, the second water film guide tubes (621) being U-shaped tube columns, and gaps being present between adjacent second water film guide tubes (621); the U-shaped openings of the first water film guide tubes (611) and the second water film guide tubes (621) are arranged opposite to each other.

4. A spray-type water film guide plate multi-stage centrifugal dust removal device according to claim 3, characterized in that: A plurality of first water film guide tubes (611) arranged in parallel and a plurality of second water film guide tubes (621) arranged in parallel close to the first water film guide tubes (611) are arranged in a staggered manner; and a plurality of second water film guide tubes (621) arranged in parallel in each row of second water film guide plate units (62) are arranged in a staggered manner, and the gaps between the plurality of first water film guide tubes (611) are connected to the gaps between the plurality of second water film guide tubes (621) arranged in parallel to form a curved channel.

5. The spray-type water film guide plate multi-stage centrifugal dust removal device according to claim 1, characterized in that: A baffle (16) is provided at the inner bottom of the dust removal shell (11), the two ends of the baffle (16) are respectively fixed to the inner walls of the dust removal shell (11) on both sides, and a drainage hole (17) is provided on the baffle (16). The baffle (16) is located between the air outlet (13) and the water film guide plate group (6).

6. A spray-type water film guide plate multi-stage centrifugal dust removal device according to claim 1, characterized in that: The spray unit (5) comprises a water delivery pipe (51) and a water delivery ring (52); The water delivery ring (52) is sleeved in the dust removal housing (11) and is arranged close to the air inlet (12), wherein the ring diameter of the water delivery ring (52) is arranged corresponding to the inner diameter of the dust removal housing (11); one end of the water delivery pipe (51) is connected to the water delivery device, and the other end is connected to the water delivery ring (52) through the outer wall of the dust removal housing (11); The water delivery ring (52) is provided with a plurality of first nozzles (53) and second nozzles (54) in a circular direction; the plurality of first nozzles (53) are located on one side of the ring body of the water delivery ring (52) and the nozzles are arranged in the direction of the air inlet (12); the plurality of second nozzles (54) are located on the other side of the ring body of the water delivery ring (52) and the nozzles are arranged in the direction of the water film guide plate group (6).

7. A spray-type water film guide plate multi-stage centrifugal dust removal device according to claim 1, characterized in that: The inlet (22) of the volute body (21) comprises a first caliber end and a second caliber end, the first caliber end is in communication with the air outlet (13), the second caliber end is in communication with the inner cavity of the volute body (21), the inner diameter of the first caliber end is greater than the inner diameter of the second caliber end, and the first caliber end and the second caliber end are connected in an arc surface.

8. The spray-type water film guide plate multi-stage centrifugal dust removal device according to claim 2, characterized in that: A water collecting plate (25) is provided at the outlet (23) of the volute body (21), and two ends of the water collecting plate (25) are respectively fixed to the inner walls on both sides of the outlet (23), and drainage pipes (26) are respectively provided on the inner walls on both sides for draining water stains in the water collecting plate (25). The water collecting plate (25) is a U-shaped plate structure, wherein one side edge of the water collecting plate (25) is fixed to the inner bottom surface of the outlet (23), and a gap is provided between the other side edge and the inner bottom surface of the outlet (23), so as to collect water stains flowing out along the outlet (23).

9. The spray-type water film guide plate multi-stage centrifugal dust removal device according to claim 1, characterized in that: It also includes a bracket (3); the bracket (3) includes a box bracket (31) and a fan bracket (32); The box support (31) and the fan support (32) are connected and arranged, the dust removal housing (11) is mounted on the box support (31), and the volute body (21) is mounted on the fan support (32); A sedimentation box (4) is provided in the box support (31), a sewage outlet (43) is provided at the top of the sedimentation box (4), and the collecting groove (15) at the bottom of the dust removal housing (11) is connected to the sewage outlet (43).

10. A multi-stage centrifugal dust removal method using a spray-type water film guide plate, characterized in that: A spray-type water film guide plate multi-stage centrifugal dust removal device according to claim 8 comprises the following steps: The impeller motor unit is started, and the volute body (21) starts to work, and the dust gas is sucked into the volute body (21) through the dust removal housing (11); When the dust gas enters the air inlet (12) of the dust removal housing (11), it fully contacts the spray water droplets output by the spray unit (5) and, under the action of inertial force, sequentially impacts the first water film guide plate unit (61) and the plurality of rows of second water film guide plate units (62) along the airflow direction, wherein the dust gas carrying the spray water droplets is guided through the first water film guide plate unit (61) and sequentially enters the plurality of rows of second water film guide plate units (62), and performs a counteraction in the plurality of rows of second water film guide plate units (62). Dust is captured, at which point the dust particles, under the action of inertia, collide with a plurality of rows of second water film guide plate units (62) in sequence along the direction of the airflow and gather with the spray water droplets; under the action of the gravity of the spray water droplets and the parallel component of the dust gas velocity in the grooves of the plurality of rows of second water film guide plate units (62), the dust particles are guided along the plurality of rows of second water film guide plate units (62) to the collecting groove (15) at the bottom inner side of the dust removal housing (11), and are discharged through the collecting groove (15), thereby completing the first-level dust removal; The gas after the primary dust removal passes through a plurality of curved channels and is sucked into the volute body (21) again through the air outlet (13), and rotates in the volute body (21). The dust particles remaining in the liquid and the gas are thrown to the inner wall of the volute body (21) at high speed along the tangent direction of the air flow under the action of centrifugal inertia force, and are discharged from the drainage pipes (26) on both sides of the outlet (23) along the inner wall of the volute body (21), thereby completing the secondary dust removal.

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