Device for removing paint mist

Abstract

The present invention and the field of waste gas treatment, in particular, relate to a device for removing paint mist, comprising a shell, a guide mechanism, a water spray device, a regulating device, a filtering device, a wastewater pump, a centrifugal pump, a waste gas inlet, a waste gas outlet and a maintenance area, the waste gas outlet is connected to an exhaust fan, the paint mist waste gas is mixed with water containing a treatment agent sprayed by the water spray device when passing through the guide mechanism, and the gas-water mixture forms a high negative pressure vacuum zone when passing through the outlet of the guide mechanism, due to the different acceleration of the gas phase / liquid phase, a part of the paint mist particles fall into the water, and the other part of the paint mist enters the second chamber through the through holes on the partition, and moves toward the waste gas outlet through the filtering device, and the water spray device sprays the water containing the treatment agent downward, so that the paint mist waste gas quickly condenses when passing through the filtering device and is collected in a storage box. The device has a simple structure, is easy to maintain and operate, is safe and reliable, solves the problem of easy clogging of the filtering device, and improves efficiency.

Description

Technical Field

[0001] The present invention relates to the field of waste gas treatment, and in particular to a device for removing paint mist. Background Art

[0002] As environmental protection issues in my country become more prominent, exhaust emissions have risen to a level that is strictly controlled. At present, the treatment of paint mist is mainly divided into two types: wet and dry. Among them, wet treatment technology is more widely used, but wet treatment has the problem that the humidity in the painting space increases and the humidity requirements of the painting environment are inconsistent. Dry treatment is easy to clog, the equipment is prone to explosion risks, the filter device needs to be replaced frequently, the treatment cost is high and the treatment efficiency is low.

[0003] The technical problem to be solved by the present invention is that the existing filter device of the paint mist removal device is easily clogged and needs to be replaced frequently, resulting in high treatment cost and low treatment efficiency. Summary of the invention

[0004] 1. Technical issues to be solved

[0005] The purpose of the invention is to overcome the problems existing in the existing treatment methods. The main principle is to make the paint mist in the exhaust gas fully contact with water, and utilize the gas / liquid phase acceleration difference to achieve the purpose of removing the paint mist. A treatment agent is added to the water body to break the viscosity of the paint and precipitate the paint mist. When the treated paint mist passes through the filter device, the precipitated paint mist particles are collected in the storage box of the filter device to achieve the purpose of removing the paint mist.

[0006] 2. Technical solution

[0007] To solve the above problems, the present invention adopts the following technical solutions.

[0008] The present invention provides a device for removing paint mist, comprising a shell, a guide mechanism provided with an inlet and an outlet, a water spray device, an adjusting device for adjusting the outlet diameter of the guide mechanism, a filtering device for filtering paint mist particles, a wastewater pump and a centrifugal pump, wherein the shell comprises an upper shell and a lower shell distributed up and down, a sealing gasket is connected between the upper shell and the lower shell, the inner space of the shell is divided into a first chamber and a second chamber by a partition, a plurality of through holes for connecting the first chamber and the second chamber are opened on the partition, the through holes are located in the lower shell, and an exhaust gas inlet connected to the first chamber and an exhaust gas outlet connected to the second chamber are respectively opened at the upper end of the shell;

[0009] The flow guiding mechanism is located in the first chamber, and both left and right ends thereof are fixedly connected to the inner wall of the first chamber;

[0010] The water spray device penetrates the side wall of the housing and extends into the interior of the flow guide mechanism;

[0011] The wastewater pump is connected to the interior of the lower shell through a pipeline and is used to pump out the wastewater accumulated in the lower shell;

[0012] The centrifugal pump is connected to the water spray device and the filtering device respectively through pipelines;

[0013] The inlet diameter of the guide mechanism is larger than the outlet diameter, and the cross section of the guide channel of the guide mechanism presents a continuous change in size from top to bottom, so that the paint mist exhaust gas entering from the inlet of the guide mechanism and the water mist sprayed by the water spray device are fully mixed inside the guide mechanism;

[0014] The filtering device is located in the second chamber and fixedly connected to the inner wall of the second chamber;

[0015] A maintenance area is provided on the side wall of the shell;

[0016] The regulating device is located in the first chamber and fixedly connected to the inner wall of the shell. The regulating device is located outside the flow guide mechanism and close to the maintenance area.

[0017] Furthermore, the side wall of the lower shell protrudes from the side wall of the upper shell to form a protrusion, the protrusion is connected to the second chamber, and the upper end opening of the protrusion is covered with a cover plate.

[0018] Furthermore, the upper port diameter of the guide mechanism matches the diameter of the exhaust gas inlet port, and the guide mechanism includes two symmetrically distributed guide plates, and the guide plates include a first bent plate, a second bent plate, a third bent plate and a fourth bent plate that are integrally formed, the second bent plate is in a shape, and the fourth bent plate is in a triangular structure with an opening, the water spray device is located on the inner sides of the second bent plate and the fourth bent plate, and a plurality of air vents are provided on the bottom edge of the fourth bent plate.

[0019] Furthermore, the water spray device includes a plurality of first water pipes and a connecting piece fixedly sleeved on the first water pipes, the first water pipes penetrate the side wall of the shell and extend into the first chamber, a plurality of atomization holes are drilled on the wall of the first water pipe located inside the first chamber, and the connecting piece is fixedly connected to the outer wall of the shell.

[0020] Furthermore, the adjusting device is used to adjust the size of the outlet diameter of the guide mechanism. The adjusting device is in contact with but not connected to the guide mechanism. The adjusting device includes a fixed plate fixedly connected to the inner wall of the first chamber, a screw rod penetrating the fixed plate, and a nut threadedly engaged with the screw rod. By adjusting the size of the outlet diameter of the guide mechanism, the gas flow rate of the outlet of the guide mechanism is adjusted, and the speed at which the paint mist exhaust gas passes through the filter device is controlled, so that all the paint mist exhaust gas entering the filter device can be in contact with the water containing the treatment agent as much as possible.

[0021] Furthermore, the filtering device includes multiple filter screens, a water spray device, and a replaceable storage box. The multiple filter screens are placed in the second chamber from top to bottom in sequence. The water spray device is installed at the lower end of the uppermost filter screen. The water spray device includes multiple second water pipes and multiple nozzles. The second water pipe passes through the side wall of the outer shell and extends into the second chamber. The nozzle is located at the lower end of the second water pipe and is connected to the second water pipe. The replaceable storage box is arranged between two adjacent filter screens. Multiple adsorption balls are placed in the replaceable storage box. The water containing the treatment agent sprayed from the multiple nozzles covers the entire cross-section of the paint mist channel as much as possible.

[0022] Furthermore, a pair of water baffles and a pair of second guide plates are provided in the lower shell, the pair of water baffles are located in the first chamber and fixedly installed with the lower end of the guide mechanism, the pair of water baffles are located on the inner side of the through hole, a distance is left between the lower end of the pair of water baffles and the inner bottom end of the lower shell, a pair of second guide plates are located in the second chamber and fixed on the side wall of the lower shell, a pair of second guide plates are respectively located on the outer side of the through hole, a height of the pair of second guide plates is greater than the height of the through hole, and a distance is left between the lower end of the pair of second guide plates and the inner bottom end of the lower shell.

[0023] Furthermore, the inspection area includes a front inspection port opened on the shell and connected to the first chamber and a rear inspection port connected to the second chamber, and doors are installed in the front inspection port and the rear inspection port.

[0024] 3. Beneficial effects

[0025] Compared with the prior art, the advantages of the present invention are:

[0026] The device is provided with a guide mechanism with an adjustable outlet diameter and a water spray device between the exhaust air inlet and the filter device. When the paint mist exhaust gas passes through the guide mechanism, it is mixed with the water mist containing the treatment agent sprayed by the water spray device. Since the outlet diameter of the guide mechanism is smaller than the inlet diameter, the gas-water mixture forms a high negative pressure vacuum zone at the outlet of the guide mechanism. This negative pressure is used to produce an adsorption effect. Due to the different acceleration of the gas phase / liquid phase, a part of the paint mist particles falls into the water, and the other part of the paint mist enters the subsequent filter device through the through hole on the partition, which reduces the burden on the subsequent filter device.

[0027] The paint mist exhaust gas enters the second chamber through the through hole and continues to move at high speed toward the exhaust gas outlet. The centrifugal pump delivers water containing the treatment agent to the water spray device. The water spray device sprays the water containing the treatment agent downward, so that the paint mist exhaust gas can quickly condense when passing through the filter device, and the solid particles are coated and collected in the storage box. The treatment agent in the water can also deposit the liquid paint mist;

[0028] The water source in this device is the clarified water from the paint wastewater treatment system in the factory, which can be reused. A treatment agent is added to the clarified water, which can break down the viscosity of the paint, so that the paint mist exhaust gas entering the filtering device is not easily blocked quickly.

[0029] In summary, the device has a simple structure, is easy to maintain and operate, safe and reliable, effectively solves the problem that the filtering device is easily blocked, and improves the removal efficiency of paint mist. The device uses clarified water from the paint wastewater treatment system in the factory as a water source, saving water. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a front structural stereogram of the present invention;

[0031] Figure 2 It is a back structural stereogram of the present invention;

[0032] Figure 3 It is a three-dimensional diagram of the internal structure of the present invention;

[0033] Figure 4 It is a left side cross-sectional view of the present invention;

[0034] Figure 5 It is a schematic diagram of the internal structure of the first chamber of the present invention;

[0035] Figure 6 It is a structural schematic diagram of the lower shell of the present invention;

[0036] Figure 7 It is a structural schematic diagram of the guide plate and the regulating device of the present invention;

[0037] Figure 8 It is a schematic diagram of the structure of the filtering device of the present invention;

[0038] Fig. 9 It is a schematic diagram of the structure of the water spray device of the present invention.

[0039] Description of the numbers in the figure:

[0040] 1. Shell; 1a. Upper shell; 1b. Lower shell; 1b1. Protrusion; 1c. Partition; 1d. Sealing gasket; 1e. First chamber; 1f. Second chamber; 1g. Through hole; 1h. Waterproof plate; 1j. Second guide plate; 1k. Cover plate;

[0041] 2. guide mechanism; 21. guide plate; 211. first bending plate; 212. second bending plate; 213. third bending plate; 214. fourth bending plate; 2141. vent hole;

[0042] 3. Water spray device; 3a. First water pipe; 3b. Connecting piece;

[0043] 4. Adjusting device; 41. Screw rod; 42. Nut; 43. Fixing plate;

[0044] 5. Filter device; 5a. Filter screen; 5b. Water spray device; 5b1. Second water pipe; 5b2. Sprinkler; 5c. Storage box;

[0045] 6. Wastewater pump;

[0046] 7. Centrifugal pump;

[0047] 8. Exhaust air inlet;

[0048] 9. Exhaust gas outlet;

[0049] 10. Maintenance area; 10a. Front maintenance opening; 10b. Back maintenance opening. DETAILED DESCRIPTION

[0050] like Figure 1-9 The device shown is used to remove paint mist, which is mainly used for waste gas emission treatment in chemical enterprises, and includes a shell 1, a guide mechanism 2, a water spray device 3, a regulating device 4, a filtering device 5, a wastewater pump 6, a centrifugal pump 7, a waste gas inlet 8, a waste gas outlet 9 and a maintenance area 10.

[0051] The shell 1 includes an upper shell 1a and a lower shell 1b which are distributed up and down. A sealing gasket 1d is connected between the upper shell 1a and the lower shell 1b to ensure the sealing of the shell 1. The internal space of the shell 1 is divided into a first chamber 1e and a second chamber 1f by a partition 1c. A plurality of through holes 1g for connecting the first chamber 1e and the second chamber 1f are opened on the partition 1c. The through holes 1g are located in the lower shell 1b, which ensures that the water in the first chamber 1e and the second chamber 1f can communicate with each other, and the paint mist exhaust gas entering the second chamber 1f from the first chamber 1e is completely below the filtering device 5. In the actual process of removing paint mist, the exhaust gas outlet 9 is connected to an external exhaust fan through a pipeline, and the paint mist exhaust gas enters the device from the exhaust gas inlet 8. Since the cross-section of the guide channel of the guide mechanism 2 changes continuously from top to bottom, the paint mist exhaust gas can be sprayed by the water spray device 3 when passing through the guide mechanism 2. The water containing the treatment agent is mixed, and the inlet diameter of the guide mechanism 2 is larger than the outlet diameter. When the gas-water mixture passes through the outlet of the guide mechanism 2, a high negative pressure vacuum zone is formed at the outlet of the guide mechanism 2, thereby producing an adsorption effect. Due to the different acceleration of the gas phase / liquid phase, a part of the paint mist particles falls into the water, and the other part of the paint mist exhaust gas enters the second chamber 1f through the through hole 1g. The paint mist exhaust gas continues to move upward through the filter device 5 to the exhaust gas outlet 9. The centrifugal pump 7 delivers the water containing the treatment agent to the water spray device 5b. The water spray device 5b includes a plurality of second water pipes 5b1 and a plurality of nozzles 5b2, so that the water spraying surface covers the entire paint mist channel cross-section as much as possible. The water spray device 5b sprays the water containing the treatment agent downward, so that the paint mist exhaust gas can quickly condense when passing through the filter device 5, and the solid particles are coated and collected in the storage box 5c together. The treatment agent in the water can also deposit the liquid paint mist.

[0052] The wastewater pump 6 is connected to the interior of the lower shell 1b through a pipeline, and is used to pump out the wastewater in the lower shell 1b. One end of the centrifugal pump 7 is connected to the water spray device 3 and the water spray device 5b respectively through a water pipe, and the other end is connected to the paint wastewater treatment system in the factory through a pipeline. The clarified water of the paint wastewater treatment system in the factory is used as the water source of this device. At the same time, a treatment agent is added to the clarified water of the paint wastewater treatment system in the factory to supply the water containing the treatment agent to the water spray device 3 and the water spray device 5b respectively. The regulating device 4 is located on the outside of the guide mechanism 2 and is used to adjust the size of the outlet diameter of the guide mechanism 2. The flow rate of the paint mist exhaust gas is adjusted by adjusting the outlet diameter of the guide mechanism 2 to control the speed of the paint mist exhaust gas passing through the filtering device, so that all the paint mist exhaust gas entering the filtering device can be in contact with the water containing the treatment agent as much as possible. The regulating device 4 is located near the front inspection port 10a for easy operation.

[0053] The inspection area 10 further includes a rear inspection opening 10b bored on the outer shell and communicating with the second chamber 1f. Doors are installed in both the front inspection opening 10a and the rear inspection opening 10b.

[0054] like Figure 5-6 As shown, the side wall of the lower shell 1b protrudes from the side wall of the upper shell 1a to form a protrusion 1b1, which is connected to the second chamber 1f. The upper end opening is covered with a cover plate 1k, which is mainly used to observe the state of the wastewater in the lower shell 1b so as to extract it in time and improve the filtering efficiency of the device. The lower shell 1b is provided with a water baffle 1h and a second guide plate 1j. The water baffle 1h is located in the first chamber 1e and is fixedly installed with the lower end of the guide mechanism 2. The water baffle 1h is located on the inner side of the through hole 1g The water-blocking plate 1h guides the paint mist exhaust gas from the outlet of the guide mechanism 2 to the bottom end of the lower shell 1b. A distance is left between the lower end of the water-blocking plate 1h and the inner wall of the lower shell 1b to facilitate the passage of the paint mist exhaust gas through the reserved gap. The second guide plate 1j is located in the second chamber 1f and fixed on the side wall of the lower shell 1b. The second guide plate 1j is located on the outside of the through hole 1g. The upper end of the second guide plate 1j is higher than the upper end of the through hole 1g, and a distance is left between the lower end of the guide plate 1j and the bottom of the lower shell 1b.

[0055] like Figure 7 As shown, the upper port diameter of the guide mechanism 2 matches the diameter of the exhaust gas inlet, and the guide mechanism 2 includes two symmetrically distributed guide plates 21, and the guide plate 21 includes a first bent plate 211, a second bent plate 212, a third bent plate 213 and a fourth bent plate 214 formed in one piece. The purpose of the guide plate designed in such a shape is to change the flow direction of the gas multiple times. The second bent plate 212 is U-shaped, and the fourth bent plate 214 is a triangular structure with an opening, which is convenient for placing the water spray device 3 on the second bent plate 212 and the fourth bent plate 214. On the inner side of the four bent plates 214, a plurality of air vents 2141 are provided on the bottom edge of the fourth bent plate 214. The paint mist exhaust gas passing through the air vents 2141 and the paint mist exhaust gas at the outlet of the guide mechanism 2 are gathered at the middle position, where the paint mist particles in the paint mist exhaust gas collide with each other and are easy to fall into the water. The adjusting device 4 includes a fixing plate 43 fixedly connected to the inner wall of the first chamber 1e, a screw rod 41 passing through the fixing plate 43, and a nut threadedly engaged with the screw rod 41, which is used to adjust the outlet diameter of the guide mechanism 2.

[0056] like Figure 8As shown, the filter device 5 includes a plurality of filter screens 5a, a water spray device 5b, and a replaceable storage box 5c. The plurality of filter screens 5a are sequentially placed in the second chamber 1f from top to bottom. The water spray device 5b is arranged at the lower side of the uppermost filter screen 5a. The water spray device 5b includes a second water pipe 5b1 and a plurality of nozzles 5b2. The second water pipe 5b1 passes through the side wall of the housing 1 and extends into the second chamber 1f. The nozzle 5b2 is located at the lower end of the second water pipe 5b1 and is connected to the second water pipe 5b1. The water spray device 5b covers the entire cross-section of the second chamber. The replaceable storage box 5c is arranged between two adjacent filter screens 5a. The bottom of the replaceable storage box 5c is composed of the filter screen 5a, and a plurality of adsorbable balls are placed inside.

[0057] like Fig. 9 As shown, the water spray device 3 includes a first water pipe 3a and a connecting piece 3b. The first water pipe 3a penetrates the side wall of the shell 1 and extends into the first chamber 1e. A plurality of atomization holes are drilled on the wall of the first water pipe 3a inside the first chamber 1e. The function of the connecting piece 3b is to facilitate the fixed connection between the first water pipe 3a and the outer wall of the shell 1.

[0058] The above is only a preferred specific implementation manner of the present invention; but the protection scope of the present invention is not limited thereto; any technician familiar with the technical field within the technical scope disclosed by the present invention; any equivalent replacement or change based on the technical solution and improved concept of the present invention shall be covered by the protection scope of the present invention.

Claims

1. A device for removing paint mist, characterized in that: The invention comprises a housing (1), a flow guiding mechanism (2) provided with an inlet and an outlet, a water spray device (3), an adjusting device (4) for adjusting the outlet diameter of the flow guiding mechanism (2), a filtering device (5) for filtering out paint mist particles, a wastewater pump (6) and a centrifugal pump (7), wherein the housing (1) comprises an upper housing (1a) and a lower housing (1b) arranged in an upper and lower manner, a sealing gasket (1d) being connected between the upper housing (1a) and the lower housing (1b), an internal space of the housing (1) being divided into a first chamber (1e) and a second chamber (1f) by a partition (1c), a plurality of through holes (1g) for connecting the first chamber (1e) and the second chamber (1f) being formed on the partition (1c), the through holes (1g) being located in the lower housing (1b), and an exhaust gas inlet (8) communicating with the first chamber (1e) and an exhaust gas outlet (9) communicating with the second chamber (1f) being formed at the upper end of the housing (1); The flow guiding mechanism (2) is located in the first chamber (1e), and both left and right ends thereof are fixedly connected to the inner wall of the first chamber (1e); The water spray device (3) penetrates the side wall of the housing (1) and extends into the interior of the flow guide mechanism (2); The wastewater pump (6) is connected to the interior of the lower shell (1b) through a pipeline and is used to pump out the wastewater accumulated in the lower shell (1b); The centrifugal pump (7) is connected to the water spray device (3) and the filter device (5) through pipelines, respectively, so as to supply water containing the treatment agent to the water spray device (3) and the filter device (5) respectively; The inlet diameter of the flow guiding mechanism (2) is larger than the outlet diameter, and the cross section of the flow guiding channel of the flow guiding mechanism (2) changes continuously from top to bottom, so that the paint mist exhaust gas entering from the inlet of the flow guiding mechanism (2) and the water mist sprayed by the water spray device (3) are mixed inside the flow guiding mechanism (2); The filtering device (5) is located in the second chamber (1f) and is fixedly connected to the inner wall of the second chamber (1f); A maintenance area (10) is provided on the side wall of the housing (1); The regulating device (4) is located in the first chamber (1e) and is fixedly connected to the inner wall of the outer shell (1); the regulating device (4) is located outside the flow guide mechanism (2) and close to the maintenance area (10); The side wall of the lower shell (1b) protrudes from the side wall of the upper shell (1a) to form a protrusion (1b1), the protrusion (1b1) is connected to the second chamber (1f), and the upper end opening of the protrusion (1b1) is covered with a cover plate (1k); The inspection area (10) comprises a front inspection opening (10a) opened on the outer shell (1) and connected to the first chamber (1e), and a rear inspection opening (10b) connected to the second chamber (1f); doors are installed in the front inspection opening (10a) and the rear inspection opening (10b).

2. The device for removing paint mist according to claim 1, characterized in that: The upper port diameter of the flow guide mechanism (2) matches the diameter of the exhaust gas inlet (8); the flow guide mechanism (2) comprises two symmetrically distributed flow guide plates (21); the flow guide plates (21) comprise an integrally formed first bent plate (211), a second bent plate (212), a third bent plate (213) and a fourth bent plate (214); the second bent plate (212) is U-shaped; the fourth bent plate (214) is a triangular structure with an opening; the water spray device (3) is located on the inner side of the second bent plate (212) and the fourth bent plate (214); and a plurality of ventilation holes (2141) are provided on the bottom edge of the fourth bent plate (214).

3. The device for removing paint mist according to claim 1, characterized in that: The water spray device (3) comprises a plurality of first water pipes (3a) and a connecting piece (3b) fixedly sleeved on the first water pipes (3a); the first water pipes (3a) penetrate the side wall of the housing (1) and extend into the first chamber (1e); a plurality of atomizing holes are drilled on the wall of the first water pipes (3a) located inside the first chamber (1e); and the connecting piece (3b) is fixedly connected to the outer wall of the housing (1).

4. The device for removing paint mist according to claim 1, characterized in that: The adjusting device (4) is used to adjust the size of the outlet caliber of the flow guiding mechanism (2); the adjusting device (4) is in contact with but not connected to the flow guiding mechanism (2); the adjusting device (4) comprises a fixing plate (43) fixedly connected to the inner wall of the first chamber (1e), a screw rod (41) passing through the fixing plate (43), and a nut threadedly engaged with the screw rod (41).

5. The device for removing paint mist according to claim 1, characterized in that: The filter device (5) comprises a plurality of filter screens (5a), a water spray device (5b) and a replaceable storage box (5c); the plurality of filter screens (5a) are sequentially placed in the second chamber (1f) from top to bottom; the water spray device (5b) is installed at the lower end of the uppermost filter screen (5a); the water spray device (5b) comprises a plurality of second water pipes (5b1) and a plurality of spray heads (5b2); the second water pipes (5b1) penetrate the side wall of the housing (1) and extend into the second chamber (1f); the spray heads (5b2) are located at the lower end of the second water pipes (5b1) and communicate with the second water pipes (5b1); the replaceable storage box (5c) is arranged between two adjacent filter screens (5a); and a plurality of adsorption balls are placed in the replaceable storage box (5c).

6. The device for removing paint mist according to claim 1, characterized in that: A pair of baffles (1h) and a pair of second guide plates (1j) are arranged in the lower shell (1b); the pair of baffles (1h) are located in the first chamber (1e) and are fixedly mounted to the lower end of the guide mechanism (2); the pair of baffles (1h) are located on the inner side of the through hole (1g); a distance is left between the lower ends of the pair of baffles (1h) and the inner bottom end of the lower shell (1b); a pair of second guide plates (1j) are located in the second chamber (1f) and are fixed on the side wall of the lower shell (1b); the pair of second guide plates (1j) are respectively located on the outer sides of the through hole (1g); the height of the pair of second guide plates (1j) is greater than the height of the through hole (1g); and a distance is left between the lower ends of the pair of second guide plates (1j) and the inner bottom end of the lower shell (1b).

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