An air purification system in a paint spraying room

Abstract

The present application relates to the field of gas treatment, and more particularly to an air purification system in a paint spraying room, comprising an upper air duct arranged at the upper part of the paint spraying room and sending air downward, a lower suction pipe arranged at the bottom of the paint spraying room and sucking air, a water shower box arranged outside the paint spraying room and connected to the lower suction pipe, an exhaust fan connected to the water shower box and extracting air from the water shower box, a nozzle arranged in the water shower box and spraying detergent, an activated carbon box connected to the air outlet of the exhaust fan and absorbing organic waste gas, the upper air duct and the lower suction pipe are aligned in the vertical direction, the lower suction pipes are arranged in several rows and two adjacent rows of the lower suction pipes are staggered, so that the paint exhaust gas can be more fully sucked into the lower suction pipe, thereby reducing the residual paint exhaust gas in the paint spraying room.

Description

Technical Field

[0001] The present application relates to the field of gas treatment, and in particular to an air purification system in a paint spraying room. Background Art

[0002] Paint spraying produces paint exhaust gas, including paint mist in the form of particles and organic waste gas in the form of gas. In order to protect the health of workers in the paint spraying room and reduce pollution to the environment, the paint exhaust gas needs to be centrally treated before being discharged. There are many ways to treat paint exhaust gas, and the best treatment effect is the composite treatment.

[0003] For example, a paint spraying room and its waste gas treatment device with publication number CN118357100A sucks the air in the paint spraying room with paint waste gas into a cleaning pool, and then passes through an adsorption box filled with activated carbon, etc., and finally discharges it to the external environment.

[0004] With respect to the above-mentioned related technologies, the density of paint exhaust gas is greater than that of air, and it tends to settle and concentrate on the floor of the paint spraying room, while the air collecting frame arranged on the top of the paint spraying room is difficult to effectively suck in the paint exhaust gas in the paint spraying room for purification. Summary of the invention

[0005] In order to more fully purify the paint exhaust gas in the paint spraying room, the present application provides an air purification system for the paint spraying room.

[0006] The present application provides an air purification system for a paint spraying room, which adopts the following technical solution.

[0007] An air purification system in a paint spraying room comprises an upper air duct which is arranged at the upper part of the paint spraying room and sends air downward, a lower suction pipe which is arranged at the bottom of the paint spraying room and sucks air, a water shower box which is arranged outside the paint spraying room and connected to the lower suction pipe, an exhaust fan which is connected to the water shower box and extracts air in the water shower box, a nozzle which is arranged in the water shower box and sprays detergent, and an activated carbon box which is connected to the air outlet of the exhaust fan and absorbs organic waste gas. The upper air duct and the lower suction pipe are aligned in the vertical direction, and the lower suction pipes are arranged in several rows, and two adjacent rows of the lower suction pipes are staggered.

[0008] By adopting the above technical solution, during the painting operation, the upper air duct supplies air from top to bottom, and the lower suction pipe can suck in the air at the bottom of the paint spraying room, so that the paint exhaust gas that is easily gathered at the bottom of the paint spraying room is concentrated and sucked into the lower suction pipe, thereby more effectively reducing the concentration of the paint exhaust gas in the paint spraying room, so as to more fully treat the paint exhaust gas generated during painting.

[0009] Optionally, each of the lower suction pipes is fixedly connected to a pipe end box at one end of the paint spraying room, a grille plate is detachably connected to an opening on one side of the pipe end box in the paint spraying room, an upper plate is detachably connected to the opening of the lower suction pipe in the pipe end box, a peripheral plate is fixedly connected to the periphery of the upper plate, a bottom end of the peripheral plate is lower than the height of the opening surface of the lower suction pipe in the pipe end box, and there is a gap between the upper plate and the peripheral plate and the lower suction pipe to allow air to pass through.

[0010] By adopting the above technical solution, some larger debris can be blocked from directly entering the lower suction pipe, preventing the lower suction pipe from being blocked, so that the lower suction pipe can smoothly inhale the paint exhaust gas for a long time.

[0011] Optionally, the pipe end box is connected to a discharge pipe, the discharge pipe is connected to a vacuum pump for sucking out debris in the pipe end box, and the air inlet of the vacuum pump is connected to a filter box for preventing debris from passing through the pipe end box.

[0012] By adopting the above technical solution, the debris accumulated in the pipe end box can be sucked out, thereby improving the convenience of cleaning the dust and debris in the pipe end box.

[0013] Optionally, the exhaust pipe includes a longitudinal pipe and a transverse pipe, the longitudinal pipe and the transverse pipe are perpendicular to each other, two adjacent pipe end boxes are connected by the same longitudinal pipe or transverse pipe, two vacuum pumps are provided, and the two vacuum pumps are connected to the longitudinal pipe and the transverse pipe one by one.

[0014] By adopting the above technical solution, the debris in the pipe end box can be cleaned more comprehensively, reducing the possibility of cleaning dead corners in the pipe end box, so as to reduce the blockage in various places in the pipe end box as much as possible.

[0015] Optionally, there is an infrared sensor on the upper part of the inner wall of the tube end box, and the infrared sensor and the vacuum pump are electrically connected to a controller.

[0016] By adopting the above technical solution, the accumulation of debris in each pipe end box can be judged, and the staff no longer needs to remove each grid plate regularly in turn to judge the blockage situation in each pipe end box.

[0017] Optionally, the cross-section of the inner wall of the tube end box and the cross-section of the outer wall of the lower suction pipe are coaxial circles, the circumferential inner wall of the tube end box rotates around its own axis and is connected to a sensor block for installing an infrared sensor, the infrared sensor detection end is aligned with the circumferential outer wall of the lower suction pipe, and the tube end box is detachably connected to an external motor that rotates the sensor block.

[0018] By adopting the above technical solution, when there is a place in the pipe end box where the height of the accumulated debris is higher than the height of the infrared sensor, the infrared sensor can face the accumulated debris during the process of rotating around the axis of the lower suction pipe. At this time, the vacuum pump will operate to clean up the debris in the pipe end box in time, reduce the blockage effect on the lower suction pipe, so that the lower suction pipe can effectively inhale the paint exhaust gas in time.

[0019] Optionally, a row of box plates are fixedly connected to the top and bottom surfaces of the water shower box, and the two rows of box plates are staggered in the vertical direction. The air inlet and outlet of the water shower box are located on both sides of the top of the water shower box so that the air in the water shower box is transmitted in a serpentine manner between the two rows of box plates, and the nozzle is located on the top surface of the water shower box where the air flows upward.

[0020] By adopting the above technical solution, the water sprayed from the nozzle and the paint exhaust gas are offset to retain the dust and paint mist in the paint exhaust gas in the water shower box and send it away together with the water for corresponding treatment, and the setting of multiple box plates can be improved.

[0021] Optionally, all of the upper air ducts are detachably connected to the same pipe moving rack that can move in the paint spraying room, and a pipe moving motor is provided around the pipe moving rack. The output shaft of the pipe moving motor is coaxially detachably connected to a reciprocating screw that is threadedly connected to the pipe moving rack to enable all of the upper air ducts to move so as to be displaced with the lower suction pipe.

[0022] By adopting the above technical solution, before the painting work is carried out, the pipe moving rack can reciprocate along the predetermined direction, so that each upper air duct can reciprocate between the corresponding two lower suction pipes, so as to remove the dust at the bottom of the paint spraying room as much as possible, thereby reducing the presence of more dust in the paint spraying room at the beginning of the painting work and affecting the paint spraying quality.

[0023] Optionally, a front dust sensor is provided at the air inlet of the water shower box, and a rear dust sensor is provided at the air outlet of the water shower box. The front dust sensor, the rear dust sensor and the sprinkler are electrically connected to a controller.

[0024] By adopting the above technical solution, the front dust sensor detects the dust concentration in the air entering the water shower box to adjust the water spray volume of all nozzles. The rear dust sensor can detect the dust concentration of the air sent out of the water shower box to ensure that the air entering the activated carbon box does not contain too much dust impurities, so as to prevent too much dust from entering the activated carbon box and affecting the absorption effect of organic gas.

[0025] Optionally, an internal dust sensor is provided in the water shower box at a position where the air flows downward, and the internal dust sensor is electrically connected to the controller.

[0026] By adopting the above technical solution, each time the air passes under a nozzle, it will pass through the corresponding internal dust sensor to determine whether the dust concentration of the air meets the standard and whether the subsequent nozzles need to be opened, so as to better adapt the spray treatment to the air with different dust concentrations, so as to reduce the entry of excessive dust into the activated carbon box as much as possible, and at the same time, reduce the generation of water vapor as much as possible, reduce the water vapor entering the activated carbon box, and make the adsorption effect of the activated carbon box on organic gases less easily affected.

[0027] In summary, the present application includes at least the following beneficial effects.

[0028] During the painting work, the upper air duct supplies air from top to bottom, and the lower suction pipe can suck in the air at the bottom of the paint spraying room, so that the paint exhaust gas that is easy to gather at the bottom of the paint spraying room is concentrated and sucked into the lower suction pipe, which more effectively reduces the concentration of paint exhaust gas in the paint spraying room, so as to more fully treat the paint exhaust gas generated during painting. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a pipeline schematic diagram of this application;

[0030] Figure 2 It is a schematic diagram of the structure of the arrangement of the present application in the spray booth, viewed from bottom to top;

[0031] Figure 3 It is a structural schematic diagram of a partial cross-section of a grid plate, an upper plate and a peripheral plate at a lower suction pipe;

[0032] Figure 4 is a system block diagram of the control part of this application;

[0033] Figure 5 It is a schematic diagram of the cross-sectional structure of the water shower box.

[0034] Explanation of the reference numerals in the accompanying drawings: 1. upper air duct; 2. lower suction pipe; 3. water shower box; 31. tube transfer motor; 32. reciprocating screw; 33. front dust sensor; 34. rear dust sensor; 35. inner dust sensor; 36. sealing plate; 37. spray booth; 4. exhaust fan; 41. longitudinal pipe; 42. transverse pipe; 43. infrared sensor; 44. controller; 45. sensor block; 47. motor outside the tube; 49. tube transfer rack; 5. nozzle; 51. activated carbon box; 52. tube end box; 53. grille plate; 54. upper plate; 55. peripheral plate; 56. box plate; 57. discharge pipe; 58. vacuum pump; 59. filter box. DETAILED DESCRIPTION

[0035] The present application is further described in detail below in conjunction with the accompanying drawings.

[0036] The present application embodiment discloses an air purification system for a paint spraying room, referring to Figure 1, including an upper air duct 1 located at the top of the spray booth 37 and a lower suction pipe 2 located at the bottom of the spray booth 37, the upper air duct 1 is connected to an external blower to vertically send air downward into the spray booth 37. The lower suction pipe 2 is connected to a water shower box 3 located outside the spray booth 37, the water shower box 3 is connected to an exhaust fan 4 that enables the lower suction pipe 2 to suck air from the bottom of the spray booth 37 and send it into the water shower box 3, and the air outlet of the exhaust fan 4 is connected to an activated carbon box 51, so that the paint exhaust gas first passes through the water shower box 3 to remove paint mist and dust as much as possible, and then passes through the activated carbon box 51 to absorb the organic waste gas.

[0037] Reference Figure 2 The top of the paint spraying room 37 is slidably connected to a pipe moving rack 49 in the horizontal direction. The outer walls of the ends of all the upper air ducts 1 can be detachably connected to the pipe moving rack 49. One end of the upper air duct 1 located in the paint spraying room 37 can be set as a corrugated pipe so that the end of the upper air duct 1 can move synchronously with the pipe moving rack 49. A reciprocating screw 32 is rotatably connected to the top of the paint spray booth 37, and the reciprocating screw 32 is threadedly connected to the pipe moving rack 49. The paint spray booth 37 is detachably connected to a pipe moving motor 31 whose output shaft is coaxially and detachably connected to the reciprocating screw 32. In addition, several rows of upper air ducts 1 are arranged and several are arranged in each row. The upper air ducts 1 in two adjacent rows are staggered. Each upper air duct 1 corresponds to a lower suction pipe 2, and the length of the reciprocating screw 32 is greater than or equal to the spacing between two adjacent lower suction pipes 2, so that in the process of moving the upper air duct 1, the upper air duct 1 can blow most of the dust and debris on the ground of the paint spray booth 37, so that the lower suction pipe 2 can suck in the dust and impurities at the bottom of the paint spray booth 37 as much as possible, so that the paint spray booth 37 can be cleaned before the painting work begins, thereby reducing the large dust concentration in the paint spray booth 37 during the painting work.

[0038] Reference Figure 3 , each lower suction pipe 2 is fixedly connected to a pipe end box 52 at the upper end, and the pipe end box 52 is detachably connected to the bottom of the paint spraying room 37, and the top surface of the pipe end box 52 is flush with the bottom surface of the interior of the paint spraying room 37, and a grille plate 53 is detachably connected to the upper opening of the pipe end box 52, and the end surface of the lower suction pipe 2 located in the pipe end box 52 is detachably connected to a horizontal upper plate 54, and a vertical peripheral plate 55 is fixedly connected to the periphery of the upper plate 54, and the bottom surface height of the peripheral plate 55 is lower than the height of the opening end surface of the lower suction pipe 2, and there is a distance between the upper plate 54 and the peripheral plate 55 and the lower suction pipe 2, so that while the lower suction pipe 2 can suck in the air at the bottom of the paint spraying room 37, some debris is not easy to fall directly into the lower suction pipe 2.

[0039] Reference Figure 2Each pipe end box 52 is also connected to a discharge pipe 57, and the discharge pipe 57 includes a longitudinal pipe 41 and a transverse pipe 42, which are both horizontal and perpendicular to each other. Two adjacent pipe end boxes 52 are connected through one of the longitudinal pipe 41 and the transverse pipe 42. There is a filter box 59 on the two adjacent sides perpendicular to each other outside the spray booth 37. The two filter boxes 59 correspond to the longitudinal pipe 41 and the transverse pipe 42 one by one. The two filter boxes 59 are connected to a vacuum pump 58, so that when there is too much debris in the pipe end box 52, the two vacuum pumps 58 can be operated in sequence, so that the longitudinal pipe 41 and the transverse pipe 42 can move the debris in each pipe end box 52 from two directions through the airflow, so that even if there is a blockage by the lower suction pipe 2, the debris in the pipe end box 52 can be fully discharged. In addition, there is a sealing plate 36 around the vertical inner wall of the spray booth 37, and a deformable rubber pad is adhered to the surface of the sealing plate 36 corresponding to each grid plate 53, so that the sealing plate 36 can block all the grid plates 53. A mechanical arm is set in the spray booth 37 to drive the sealing plate 36 to move from a vertical state to a horizontal state, so that the sealing plate 36 can block all the grid plates 53, so that all the debris in the pipe end box 52 can be effectively taken out by the airflow. In addition, the upper part of the opening of the pipe end box 52 connecting the longitudinal pipe 41 and the transverse pipe 42 is higher than the height of the upper plate 54, so that some debris accumulated on the upper plate 54 can also be effectively taken away by the airflow.

[0040] Reference Figure 3 and Figure 4 The inner wall of the tube end box 52 and the outer wall of the lower suction pipe 2 are both circular, the axis of the tube end box 52 is consistent with the axis of the lower suction pipe 2, the inner wall of the tube end box 52 is coaxially connected to the sensor block 45, the outer wall of the tube end box 52 is detachably connected to the outer tube motor 47, the sensor block 45 can be provided with a gear ring and the output shaft of the outer tube motor 47 is provided with a gear meshed with the gear ring, so that the outer tube motor 47 can drive the sensor block 45 to rotate. The sensor block 45 is detachably connected to the infrared sensor 43, the detection end of the infrared sensor 43 is horizontal and directly facing the outer wall of the lower suction pipe 2, and an electric slip ring is provided in the tube end box 52 to supply power and transmit signals to the rotating infrared sensor 43. The infrared sensor 43 and the vacuum pump 58 are both electrically connected to the controller 44. When the distance value detected by the infrared sensor 43 is less than the preset distance value in the controller 44, it indicates that the debris in the tube end box 52 is too high. At this time, the vacuum pump 58 is started to clean all the tube end boxes 52.

[0041] Reference Figure 5The air inlet and outlet of the water shower box 3 are both located on the top surface and are far away from each other. A row of box plates 56 are fixedly connected to the top and bottom surfaces of the water shower box 3. The two rows of box plates 56 are arranged in a staggered manner. The bottom surface of the box plate 56 connected to the top surface of the water shower box 3 is lower than the top surface of the box plate 56 connected to the bottom surface of the water shower box 3, so that the paint exhaust gas entering the water shower box 3 is serpentine. The top surface of the water shower box 3 is provided with several nozzles 5 that can be controlled by a self-contained solenoid valve and connected to an external water pump for spraying. Each nozzle 5 corresponds to the space between the two box plates 56 at the upward position of the air flow, so that the water sprayed downward and the dust and paint mist moving upward are fully contacted, and then the serpentine transmission of the air in the water shower box 3 is combined to reduce the dust and paint mist concentration in the air sent to the water shower box 3 as much as possible. In addition, the bottom surface of the water shower box 3 is connected to an external water pump to send the water sprayed by the nozzle 5 away in time.

[0042] Reference Figure 4 and Figure 5 A front dust sensor 33 is detachably connected to the air inlet of the water shower box 3, a rear dust sensor 34 is detachably connected to the air outlet of the water shower box 3, and an inner dust sensor 35 is detachably connected to the water shower box 3 at a position where the air flows downward. The inner dust sensor 35 is not required only at the position where the air flows downward directly opposite the air inlet of the water shower box 3. The inner dust sensor 35 has a dehumidification device or material inside to improve the detection accuracy of the inner dust sensor 35. The inner dust sensor 35, the rear dust sensor 34, the front dust sensor 33, the nozzle 5 and the tube moving motor 31 are all electrically connected to the controller 44.

[0043] The front dust sensor 33 detects the dust and paint mist concentration of the air sent into the water shower box 3, and then the controller 44 opens a certain number of nozzles 5 according to the concentration value detected by the front dust sensor 33 and the corresponding relationship table, and preferentially starts the nozzles 5 close to the air inlet of the water shower box 3. Each time the air rises and passes through the spraying area directly below a nozzle 5, it will enter the descending area to pass through the corresponding inner dust sensor 35. When the dust concentration detected by the inner dust sensor 35 is lower than the preset value in the controller 44, the nozzle 5 after the corresponding inner dust sensor 35 is closed, otherwise, the next nozzle 5 is started, so as to remove the dust and paint mist in the air as fully as possible, and reduce the water vapor content in the air sent out of the water shower box 3. The air sent out of the water shower box 3 will pass through the rear dust sensor 34 again. At this time, the water vapor in the air has reached the minimum value. At this time, the dust and paint mist concentration value detected by the rear dust sensor 34 is more accurate than that of the internal dust sensor 35. By comparing the detection data of the rear dust sensor 34 with the detection data of the internal dust sensor 35, it is possible to judge whether the rear dust sensor 34 can detect normally.

[0044] The implementation principle of the air purification system in a spray painting room of the embodiment of the present application is as follows: before spray painting, the pipe transfer motor 31 operates to make the upper air duct 1 move back and forth, so as to blow the dust impurities that may exist in the spray painting room 37 as much as possible and be sucked into the lower suction pipe 2. After the dust concentration detected by the current dust sensor 33 reaches the standard, the pipe transfer motor 31 will continue to rotate for a certain period of time until the rotation time of the pipe transfer motor 31 or the number of rotations of the output shaft reaches an integer multiple of a standard value, and the pipe transfer motor 31 stops running, so that the upper air duct 1 is facing the lower suction pipe 2 at this time, and then the painting operation begins, and the wind force of the upper air duct 1 and the suction force of the lower suction pipe 2 are appropriately reduced, so that while the air and the spray painting exhaust gas are discharged for treatment, it is not easy to affect the normal progress of the spray painting work. The air will enter the water shower box 3 through the lower suction pipe 2 for spraying to remove dust and paint mist. Then the air will pass through the activated carbon box 51 to remove organic gases, and the treated air will be discharged to the external environment.

[0045] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An air purification system in a paint spraying room, characterized in that: The invention comprises an upper air duct (1) disposed at the upper part of a spray painting room (37) and sending air downward, a lower suction pipe (2) disposed at the bottom of the spray painting room (37) and sucking air, a water shower box (3) disposed outside the spray painting room (37) and connected to the lower suction pipe (2), an exhaust fan (4) connected to the water shower box (3) and extracting air from the water shower box (3), a nozzle (5) disposed in the water shower box (3) and spraying detergent, and an activated carbon box (51) connected to the air outlet of the exhaust fan (4) and absorbing organic waste gas, wherein the upper air duct (1) and the lower suction pipe (2) are aligned in the vertical direction, and the lower suction pipes (2) are arranged in a plurality of rows, and two adjacent rows of the lower suction pipes (2) are arranged in a staggered manner; Each of the lower suction pipes (2) is fixedly connected to a pipe end box (52) at one end of the spray booth (37); a grille plate (53) is detachably connected to a side opening of the pipe end box (52) in the spray booth (37); an upper plate (54) is detachably connected to an opening of the lower suction pipe (2) in the pipe end box (52); a peripheral plate (55) is fixedly connected to the periphery of the upper plate (54); a bottom end of the peripheral plate (55) is lower than a height of an opening surface of the lower suction pipe (2) in the pipe end box (52); and a gap is provided between the upper plate (54) and the peripheral plate (55) and the lower suction pipe (2) to allow air to pass through. The pipe end box (52) is connected to a discharge pipe (57), the discharge pipe (57) is connected to a vacuum pump (58) for sucking out debris in the pipe end box (52), and the air inlet of the vacuum pump (58) is connected to a filter box (59) for preventing debris from passing through the pipe end box (52).

2. The air purification system in a paint spraying room according to claim 1, characterized in that: The discharge pipe (57) comprises a longitudinal pipe (41) and a transverse pipe (42), the longitudinal pipe (41) and the transverse pipe (42) being perpendicular to each other, two adjacent pipe end boxes (52) being connected by the same longitudinal pipe (41) or transverse pipe (42), two vacuum pumps (58) being provided, and the two vacuum pumps (58) being connected to the longitudinal pipe (41) and the transverse pipe (42) in a one-to-one correspondence.

3. The air purification system in a paint spraying room according to claim 1, characterized in that: An infrared sensor (43) is disposed on the upper portion of the inner wall of the tube end box (52), and the infrared sensor (43) and the vacuum pump (58) are electrically connected to a controller (44).

4. The air purification system in a paint spraying room according to claim 3, characterized in that: The inner wall cross section of the tube end box (52) and the outer wall cross section of the lower suction pipe (2) are coaxially circular. The inner wall of the tube end box (52) is connected to a sensor block (45) for mounting an infrared sensor (43) so as to rotate around its own axis. The detection end of the infrared sensor (43) is aligned with the outer wall of the lower suction pipe (2). The tube end box (52) is detachably connected to an outer tube motor (47) for rotating the sensor block (45).

5. The air purification system in a paint spraying room according to claim 1, characterized in that: A row of box plates (56) are fixedly connected to the top and bottom surfaces of the water shower box (3), and the two rows of box plates (56) are arranged in a staggered manner in the vertical direction. The air inlet and the air outlet of the water shower box (3) are located on both sides of the top of the water shower box (3) so that the air in the water shower box (3) is transmitted in a serpentine manner between the two rows of box plates (56). The nozzle (5) is located on the top surface of the water shower box (3) where the air flows upward.

6. The air purification system in a paint spraying room according to claim 1, characterized in that: All of the upper air ducts (1) are detachably connected to a pipe moving rack (49) that can move in the paint spraying room (37). A pipe moving motor (31) is provided around the pipe moving rack (49). The output shaft of the pipe moving motor (31) is coaxially detachably connected to a reciprocating screw (32) that is threadedly connected to the pipe moving rack (49) so that all of the upper air ducts (1) can move so as to be displaced with the lower suction pipe (2).

7. The air purification system in a paint spraying room according to claim 1, characterized in that: A front dust sensor (33) is provided at the air inlet of the water shower box (3), and a rear dust sensor (34) is provided at the air outlet of the water shower box (3). The front dust sensor (33), the rear dust sensor (34) and the spray head (5) are electrically connected to a controller (44).

8. The air purification system in a paint spraying room according to claim 7, characterized in that: An internal dust sensor (35) is provided in the water shower box (3) at a position where air flows downward, and the internal dust sensor (35) is electrically connected to the controller (44).

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