Gas purification device for VOC treatment and purification method thereof

Abstract

The invention discloses a gas purification device for VOC treatment and a purification method thereof.The gas purification device comprises an acid neutralization spraying mechanism and an alkaline neutralization spraying mechanism, a gas outlet of the acid neutralization spraying mechanism is connected with a gas inlet of the alkaline neutralization spraying mechanism through a guide pipe, the gas purification device further comprises a filtering assembly for filtering waste gas, and relates to the technical field of gas purification. The filter assembly is arranged, the cylindrical filter screen is used for filtering waste gas, and the cylindrical filter screen is cylindrical, so that the flying flowing speed cannot be obviously reduced; solid particles can be effectively removed through filtration of the cylindrical filter screen; the cleaning ring is arranged in the filtering assembly, and the electric telescopic rod is used for driving the cleaning ring to ascend and descend, so that solid particles on the cylindrical filtering net are cleaned, filtering holes can be prevented from being blocked, the flowing smoothness of gas is guaranteed, and the flying purification efficiency is further guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of gas purification, and in particular to a gas purification device for VOC treatment and a purification method thereof. Background Art

[0002] Although the existing gas purification devices for VOC treatment can filter harmful gases in the gas, the solid particles in the gas cannot be effectively removed, resulting in a high content of solid particles in the cleaned gas; and the purified gas contains odor, which causes the air to be polluted by odor. Summary of the invention

[0003] In view of the problems existing in the existing gas purification device for VOC treatment and the purification method thereof, the present invention is proposed.

[0004] Therefore, the purpose of the present invention is to provide a gas purification device for VOC control and a purification method thereof, which solves the problem that the existing gas purification device for VOC control can filter harmful gases in the gas, but the solid particles in the gas cannot be effectively removed, resulting in a high content of solid particles in the cleaned gas; and the purified gas contains odor, which causes the air to be polluted by odor.

[0005] To solve the above technical problems, according to one aspect of the present invention, the present invention provides the following technical solutions:

[0006] A gas purification device for VOC treatment, comprising an acidic neutralization spray mechanism and an alkaline neutralization spray mechanism, wherein the gas outlet of the acidic neutralization spray mechanism is connected to the gas inlet of the alkaline neutralization spray mechanism through a conduit, and also comprises a filter assembly for filtering the exhaust gas;

[0007] The filter assembly includes a filter housing, which is a hollow cylindrical structure with openings at both ends, a first sealing cover on the top end of the filter housing, a second sealing cover on the bottom end of the filter housing, a cylindrical filter screen is arranged in the inner cavity of the filter housing, the cylindrical filter screen is a hollow structure with openings at both ends, the top inner wall of the cylindrical filter screen is plugged into the first sealing cover and is sealed with the first sealing cover, and the bottom inner wall of the cylindrical filter screen is plugged into the second sealing cover and is sealed with the second sealing cover.

[0008] As a preferred embodiment of the gas purification device for VOC treatment described in the present invention, the filter assembly further comprises a cleaning assembly for cleaning solid particles on the cylindrical filter screen;

[0009] The cleaning assembly includes a cleaning ring, the inner wall of which is provided with bristles, the ends of the bristles are in contact with the cylindrical filter screen, the top of the cleaning ring is detachably connected to a pull rod, the top of the pull rod passes through a first cover, the first cover is provided with a through hole for the pull rod to pass through, a rubber tube is fixedly installed in the through hole, and the rubber tube elastically clamps the pull rod.

[0010] As a preferred embodiment of the gas purification device for VOC treatment described in the present invention, the top end of the cylindrical filter is provided with an air inlet, the bottom end of the cylindrical filter is provided with a three-way air outlet, the top end of the cleaning ring is welded with a first support connecting seat, the inner wall of the first support connecting seat is plugged with a pull rod, and the first support connecting seat and the pull rod are fixed by bolts.

[0011] As a preferred solution of the gas purification device for VOC treatment described in the present invention, the top end of the pulling rod is fixedly connected to the lifting drive ring, the bottom end of the lifting drive ring is detachably connected to the electric telescopic rod, and the bottom end of the electric telescopic rod is detachably connected to the first cover.

[0012] As a preferred solution of the gas purification device for VOC treatment described in the present invention, wherein: a first support connection seat is welded to the bottom end of the lifting drive ring, the electric telescopic rod is inserted into the inner wall of the first support connection seat, and the electric telescopic rod and the first support connection seat are fixed by bolts;

[0013] A second supporting connection seat is welded to the top end of the first cover, the electric telescopic rod is inserted into the inner wall of the second supporting connection seat, and the second supporting connection seat and the electric telescopic rod are fixed by bolts.

[0014] As a preferred embodiment of the gas purification device for VOC treatment described in the present invention, the acid neutralization spray mechanism includes a first spray tower, the air inlet of the first spray tower is connected to the air pump through a first air pipe, the input end of the air pump is connected to the exhaust gas box through a conduit, and the air inlet of the exhaust gas box is connected to the three-way air outlet through a conduit;

[0015] The water spray port of the first spray tower is connected to the first water pump through a first water pipe, the input end of the first water pump is connected to the first water tank through a conduit, and the first water tank is installed on the top of the exhaust gas tank.

[0016] As a preferred embodiment of the gas purification device for VOC treatment described in the present invention, the alkaline neutralization spray mechanism includes a second spray tower, and the air inlet of the second spray tower is connected to the air outlet of the first spray tower through a second air pipe;

[0017] The water spray port of the second spray tower is connected to the second water pump through a second water pipe, the input end of the second water pump is connected to the second water tank through a conduit, and the second water tank is installed on the top of the exhaust tank;

[0018] The gas outlet of the second spray tower is connected to the buffer tower through the third air pipe, and the gas outlet of the buffer tower is connected to the secondary filter assembly through a conduit.

[0019] As a preferred embodiment of the gas purification device for VOC treatment described in the present invention, the secondary filter assembly includes a filter cartridge, a filter screen is installed in the filter cartridge, activated carbon is arranged at the top of the filter screen, and a support ring is arranged at the bottom of the filter screen.

[0020] As a preferred solution of the gas purification device for VOC treatment described in the present invention, the bottom end of the filter cartridge is plugged into the base, the base is welded to the top of the exhaust gas box, and the base and the filter cartridge are fixed by bolts.

[0021] A gas purification method comprises the following steps:

[0022] Step 1: The exhaust gas enters the filter housing and the inner cavity of the cylindrical filter screen, where it is filtered through the filter holes. Solid particles are retained in the cylindrical filter screen, and the filtered exhaust gas is discharged into the exhaust box through the three-way outlet at the bottom.

[0023] Step 2: The electric telescopic rod is lifted and lowered reciprocatingly, thereby driving the pull rod to lift and lower, and the pull rod drives the cleaning ring to lift and lower, so that the bristles on the inner wall of the cleaning ring contact and rub against the cylindrical filter screen reciprocatingly, thereby scraping off the solid particles attached to the cylindrical filter screen;

[0024] Step 3: The air pump extracts the waste gas in the waste gas box into the first spray tower, the first water pump extracts the acid neutralization solution in the first water tank and sprays it into the first spray tower to complete the acid neutralization, and then the gas enters the second spray tower through the conduit;

[0025] Step 4: The second water pump draws the alkaline neutralization solution in the second water tank into the second spray tower for spraying to achieve alkaline neutralization, and then the gas enters the buffer tower, and then the gas enters the filter cartridge 20;

[0026] Step 5: Activated carbon filters the gas entering the filter cartridge to remove odor from the gas and meet emission requirements.

[0027] Compared with existing technologies:

[0028] 1. By setting up a filter assembly, the exhaust gas is filtered using a cylindrical filter. Since the cylindrical filter is cylindrical, the flying flow velocity will not be significantly reduced. Solid particles can be effectively removed by filtering through the cylindrical filter.

[0029] 2. By setting a cleaning ring in the filter assembly and using an electric telescopic rod to drive the cleaning ring to rise and fall, the solid particles on the cylindrical filter net can be cleaned off, thereby avoiding clogging of the filter holes, ensuring the smooth flow of gas, and thus ensuring the purification efficiency;

[0030] 3. By setting up alkaline neutralization spray mechanism and acid neutralization spray mechanism, the waste gas can be neutralized by acid and alkaline, so that the discharged waste liquid is neutral and acid and alkaline pollution is avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 A schematic diagram of the structure provided by the present invention;

[0032] Figure 2 An enlarged view of the filter assembly provided by the present invention;

[0033] Figure 3 The present invention provides Figure 2 A cross-sectional view of

[0034] Figure 4 A top view of the cleaning ring provided by the present invention;

[0035] Figure 5 A schematic diagram of a first supporting connection base provided by the present invention;

[0036] Figure 6 A cross-sectional view of the filter cartridge provided by the present invention.

[0037] In the figure: exhaust gas box 1, filter assembly 2, alkaline neutralization spray mechanism 3, acidic neutralization spray mechanism 4, filter shell 5, conduit 6, air pump 7, first air pipe 8, first water pipe 9, second air pipe 10, second water pipe 11, first spray tower 12, second spray tower 13, buffer tower 14, third air pipe 15, second water tank 16, second water pump 17, first water tank 18, first water pump 19, filter cartridge 20, cartridge cover 21, base 22, first sealing cover 23, second sealing cover 24, three-way air outlet 25, second support connecting seat 26, electric telescopic rod 27, pulling rod 28, first support connecting seat 29, rubber cylinder 30, cylindrical filter screen 31, first support connecting seat 32, lifting drive ring 33, cleaning ring 34, bristles 35, activated carbon 36, filter screen 37, support ring 38. DETAILED DESCRIPTION

[0038] To make the objectives, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0039] The present invention provides a gas purification device for VOC treatment, please refer to Figure 1-6 , including an acidic neutralization spray mechanism 4 and an alkaline neutralization spray mechanism 3, wherein the gas outlet of the acidic neutralization spray mechanism 4 is connected to the gas inlet of the alkaline neutralization spray mechanism 3 through a conduit, and also includes a filter component 2 for filtering the exhaust gas;

[0040] The filter assembly includes a filter housing 5, which is a hollow cylindrical structure with openings at both ends. The top end of the filter housing 5 is covered with a first cover 23, and the bottom end of the filter housing 5 is covered with a second cover 24. A cylindrical filter screen 31 is arranged in the inner cavity of the filter housing 5. The cylindrical filter screen 31 is a hollow structure with openings at both ends. The top inner wall of the cylindrical filter screen 31 is inserted into the first cover 23 and is sealed with the first cover 23, and the bottom inner wall of the cylindrical filter screen 31 is inserted into the second cover 24 and is sealed with the second cover 24.

[0041] The filter assembly also includes a cleaning assembly for cleaning solid particles on the cylindrical filter screen 31;

[0042] The cleaning assembly includes a cleaning ring 34, on the inner wall of which bristles 35 are provided, and the ends of the bristles 35 are in contact with the cylindrical filter screen 31. Therefore, the lifting and lowering of the cleaning ring 34 can hang down the solid particles on the cylindrical filter screen 31, thereby avoiding clogging of the cylindrical filter screen 31. The top of the cleaning ring 34 is detachably connected to the pull rod 28, and the top of the pull rod 28 passes through the first cover 23. The first cover 23 is provided with a through hole for the pull rod 28 to pass through. A rubber tube 30 is fixedly installed in the through hole, and the rubber tube 30 elastically clamps the pull rod 28.

[0043] An air inlet is provided at the top of the cylindrical filter screen 31, and a three-way air outlet 25 is provided at the bottom end of the cylindrical filter screen 31. A first support connecting seat 32 is welded to the top of the cleaning ring 34, and a pull rod 28 is inserted into the inner wall of the first support connecting seat 32. The first support connecting seat 32 and the pull rod 28 are fixed by bolts.

[0044] The top end of the pulling rod 28 is fixedly connected to the lifting driving ring 33 , the bottom end of the lifting driving ring 33 is detachably connected to the electric telescopic rod 27 , and the bottom end of the electric telescopic rod 27 is detachably connected to the first cover 23 .

[0045] A first support connection seat 29 is welded to the bottom end of the lifting drive ring 33, and the electric telescopic rod 27 is inserted into the inner wall of the first support connection seat 29. The electric telescopic rod 27 and the first support connection seat 29 are fixed by bolts;

[0046] A second supporting connection seat 26 is welded to the top end of the first cover 23 , an electric telescopic rod 27 is inserted into the inner wall of the second supporting connection seat 26 , and the second supporting connection seat 26 and the electric telescopic rod 27 are fixed by bolts.

[0047] The acid neutralization spray mechanism 4 comprises a first spray tower 12, the air inlet of the first spray tower 12 is connected to the air pump 7 through the first air pipe 8, the input end of the air pump 7 is connected to the exhaust box 1 through a conduit, and the air inlet of the exhaust box 1 is connected to the three-way air outlet 25 through a conduit 6;

[0048] The water spray outlet of the first spray tower 12 is connected to the first water pump 19 through the first water pipe 9, and the input end of the first water pump 19 is connected to the first water tank 18 through a conduit. Acid neutralizing liquid is provided in the first water tank 18, and the first water tank 18 is installed at the top of the exhaust tank 1.

[0049] The alkaline neutralization spray mechanism 3 comprises a second spray tower 13, and the air inlet of the second spray tower 13 is connected to the air outlet of the first spray tower 12 through a second air pipe 10;

[0050] The water spray port of the second spray tower 13 is connected to the second water pump 17 through the second water pipe 11, and the input end of the second water pump 17 is connected to the second water tank 16 through a conduit. The second water tank 16 is provided with an alkaline neutralizing liquid. The second water tank 16 is installed at the top of the exhaust tank 1;

[0051] The air outlet of the second spray tower 13 is connected to the buffer tower 14 through the third air pipe 15, and the air outlet of the buffer tower 14 is connected to the secondary filter assembly through a conduit. The secondary filter assembly includes a filter cartridge 20, and a filter screen 37 is installed in the filter cartridge 20. Activated carbon 36 is arranged at the top of the filter screen 37, and a support ring 38 is arranged at the bottom of the filter screen 37.

[0052] The bottom end of the filter cartridge 20 is plugged into the base 22 , the base 22 is welded to the top end of the exhaust box 1 , and the base 22 and the filter cartridge 20 are fixed by bolts.

[0053] A gas purification method comprises the following steps:

[0054] Step 1: The exhaust gas enters the filter housing 5 and enters the inner cavity of the cylindrical filter screen 31, and is filtered through the filter holes. Solid particles are retained in the cylindrical filter screen 31, and the filtered exhaust gas is discharged into the exhaust box 1 through the three-way outlet 25 below;

[0055] Step 2: The electric telescopic rod 27 is lifted and lowered reciprocatingly, thereby driving the pull rod 28 to be lifted and lowered, and the pull rod 28 drives the cleaning ring 34 to be lifted and lowered, so that the bristles 35 on the inner wall of the cleaning ring 34 contact and rub against the cylindrical filter screen 31 reciprocatingly, thereby scraping off the solid particles attached to the cylindrical filter screen 31;

[0056] Step 3: The air pump 7 extracts the waste gas in the waste gas box 1 into the first spray tower 12, and the first water pump 19 extracts the acid neutralization solution in the first water tank 18 and sprays it into the first spray tower 12 to complete the acid neutralization, and then the gas enters the second spray tower 13 through the conduit;

[0057] Step 4: The second water pump 17 draws the alkaline neutralization solution in the second water tank 16 into the second spray tower 13 for spraying to achieve alkaline neutralization, and then the gas enters the buffer tower 14, and then the gas enters the filter cartridge 20;

[0058] Step 5: The activated carbon 36 filters the gas entering the filter cartridge 20 to remove odor from the gas to meet emission requirements.

[0059] Although the present invention has been described above with reference to the embodiments, various modifications may be made thereto and parts thereof may be replaced by equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the various features in the embodiments disclosed in the present invention may be used in combination with each other in any manner, and the fact that these combinations are not exhaustively described in this specification is only for the sake of omitting space and saving resources. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A gas purification device for VOC treatment, comprising an acidic neutralization spray mechanism (4) and an alkaline neutralization spray mechanism (3), wherein the gas outlet of the acidic neutralization spray mechanism (4) is connected to the gas inlet of the alkaline neutralization spray mechanism (3) through a conduit, characterized in that: Also included is a filter assembly (2) for filtering the exhaust gas; The filter assembly comprises a filter housing (5), the filter housing (5) being a hollow cylindrical structure with openings at both ends, the top end of the filter housing (5) being covered with a first sealing cover (23), the bottom end of the filter housing (5) being covered with a second sealing cover (24), a cylindrical filter screen (31) being arranged in the inner cavity of the filter housing (5), the cylindrical filter screen (31) being a hollow structure with openings at both ends, the top inner wall of the cylindrical filter screen (31) being plugged into the first sealing cover (23) and being sealed with the first sealing cover (23), the bottom inner wall of the cylindrical filter screen (31) being plugged into the second sealing cover (24) and being sealed with the second sealing cover (24).

2. A gas purification device for VOC treatment according to claim 1, characterized in that: The filter assembly also includes a cleaning assembly for cleaning solid particles on the cylindrical filter screen (31); The cleaning assembly comprises a cleaning ring (34), the inner wall of which is provided with bristles (35), the ends of which are in contact with the cylindrical filter screen (31), the top end of the cleaning ring (34) is detachably connected with a pull rod (28), the top end of which passes through a first sealing cover (23), the first sealing cover (23) is provided with a through hole for the pull rod (28) to pass through, a rubber tube (30) is fixedly installed in the through hole, and the rubber tube (30) elastically clamps the pull rod (28).

3. A gas purification device for VOC treatment according to claim 2, characterized in that: The top end of the cylindrical filter screen (31) is provided with an air inlet, the bottom end of the cylindrical filter screen (31) is provided with a three-way air outlet (25), the top end of the cleaning ring (34) is welded with a first supporting connection seat (32), the inner wall of the first supporting connection seat (32) is plugged with a pulling rod (28), and the first supporting connection seat (32) and the pulling rod (28) are fixed by bolts.

4. A gas purification device for VOC treatment according to claim 3, characterized in that: The top end of the pulling rod (28) is fixedly connected to the lifting drive ring (33), the bottom end of the lifting drive ring (33) is detachably connected to the electric telescopic rod (27), and the bottom end of the electric telescopic rod (27) is detachably connected to the first cover (23).

5. A gas purification device for VOC treatment according to claim 4, characterized in that: A first supporting connection seat (29) is welded to the bottom end of the lifting drive ring (33); the electric telescopic rod (27) is inserted into the inner wall of the first supporting connection seat (29); and the electric telescopic rod (27) and the first supporting connection seat (29) are fixed by bolts; A second supporting connection seat (26) is welded to the top end of the first cover (23); the electric telescopic rod (27) is inserted into the inner wall of the second supporting connection seat (26); and the second supporting connection seat (26) and the electric telescopic rod (27) are fixed by bolts.

6. A gas purification device for VOC treatment according to claim 1, characterized in that: The acid neutralization spray mechanism (4) comprises a first spray tower (12), the air inlet of the first spray tower (12) is connected to an air pump (7) via a first air pipe (8), the input end of the air pump (7) is connected to an exhaust gas box (1) via a conduit, and the air inlet of the exhaust gas box (1) is connected to a three-way air outlet (25) via a conduit (6); The water spray outlet of the first spray tower (12) is connected to the first water pump (19) through a first water pipe (9), the input end of the first water pump (19) is connected to the first water tank (18) through a conduit, and the first water tank (18) is installed at the top of the exhaust gas tank (1).

7. A gas purification device for VOC treatment according to claim 6, characterized in that: The alkaline neutralization spray mechanism (3) comprises a second spray tower (13), the air inlet of the second spray tower (13) being connected to the air outlet of the first spray tower (12) via a second air pipe (10); The water spray outlet of the second spray tower (13) is connected to a second water pump (17) via a second water pipe (11); the input end of the second water pump (17) is connected to a second water tank (16) via a conduit; and the second water tank (16) is installed at the top of the exhaust gas tank (1); The gas outlet of the second spray tower (13) is connected to the buffer tower (14) via a third air pipe (15), and the gas outlet of the buffer tower (14) is connected to the secondary filter assembly via a conduit.

8. A gas purification device for VOC treatment according to claim 1, characterized in that: The secondary filtration assembly comprises a filter cartridge (20), a filter screen (37) is installed in the filter cartridge (20), activated carbon (36) is arranged at the top end of the filter screen (37), and a support ring (38) is arranged at the bottom end of the filter screen (37).

9. A gas purification device for VOC treatment according to claim 8, characterized in that: The bottom end of the filter cartridge (20) is plugged into a base (22), the base (22) is welded to the top end of the exhaust gas box (1), and the base (22) and the filter cartridge (20) are fixed by bolts.

10. A method for gas purification using the gas purification device according to any one of claims 1 to 9, characterized in that: The specific steps include: Step 1: The exhaust gas enters the filter housing (5) and enters the inner cavity of the cylindrical filter screen (31), where it is filtered through the filter holes. Solid particles are retained in the cylindrical filter screen (31). The filtered exhaust gas is discharged into the exhaust gas box (1) through the three-way outlet (25) at the bottom. Step 2: The electric telescopic rod (27) is lifted and lowered reciprocatingly, thereby driving the pulling rod (28) to be lifted and lowered, and the pulling rod (28) drives the cleaning ring (34) to be lifted and lowered, so that the bristles (35) on the inner wall of the cleaning ring (34) are in contact with and rubbed against the cylindrical filter screen (31) reciprocatingly, thereby scraping off the solid particles attached to the cylindrical filter screen (31); Step 3: The air pump (7) draws the waste gas in the waste gas box (1) into the first spray tower (12), the first water pump (19) draws the acid neutralization solution in the first water tank (18) and sprays it into the first spray tower (12) to complete the acid neutralization, and then the gas enters the second spray tower (13) through the conduit; Step 4: The second water pump (17) draws the alkaline neutralization solution in the second water tank (16) into the second spray tower (13) for spraying to achieve alkaline neutralization, and then the gas enters the buffer tower (14), and then the gas enters the filter cartridge (20); Step 5: The activated carbon (36) filters the gas entering the filter cartridge (20) to remove odor from the gas and meet emission requirements.

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