Ultra-clean exhaust gas treatment system and treatment method

Abstract

The present invention discloses an ultra-clean exhaust gas treatment system and treatment method, the ultra-clean exhaust gas treatment system includes a purification tower, a spray pump, a dosing pump, an exhaust pipe and an exhaust fan; the purification tower is vertically arranged, and a circulating water tank, an air-homogenizing layer, a gas-liquid fusion layer, a first filling layer, a first spraying layer, a second filling layer, a second spraying layer, a gas-liquid separation layer, a water-proof layer and an air layer are formed in the purification tower, which are connected in sequence from bottom to top. This product can realize multiple spraying of the exhaust gas by setting an integrally connected circulating water tank, an air-homogenizing layer, a gas-liquid fusion layer, a first filling layer, a first spraying layer, a second filling layer, a second spraying layer, a gas-liquid separation layer, a water-proof layer and an air layer, and utilizes an atomizing device to atomize the medicine into water vapor, so that the exhaust gas and the water vapor are fully fused and reacted to thoroughly absorb the harmful substances in the exhaust gas; and the structure is simple and easy to implement.

Description

Technical Field

[0001] The present invention relates to waste gas treatment technology, and in particular to an ultra-clean waste gas treatment system and method. Background Art

[0002] Waste gas treatment mainly refers to the treatment of industrial waste gas such as dust particles, smoke, odor, and toxic and harmful gases generated in industrial places. Common waste gas treatments include factory smoke waste gas purification, workshop dust waste gas purification, organic waste gas purification, waste gas odor purification, acid and alkali waste gas purification, chemical waste gas purification, etc.

[0003] Although the existing waste gas treatment equipment can achieve waste gas treatment, the existing waste gas treatment equipment has a complex structure and poor waste gas treatment effect. Therefore, it is necessary to study a new solution to solve the above problems. Summary of the invention

[0004] In view of this, the present invention aims at the deficiencies in the prior art, and its main purpose is to provide an ultra-clean exhaust gas treatment system and treatment method, which can effectively solve the problems of complex structure and poor exhaust gas treatment effect of existing exhaust gas treatment equipment.

[0005] To achieve the above purpose, the present invention adopts the following technical solutions:

[0006] An ultra-clean exhaust gas treatment system comprises a purification tower, a spray pump, a dosing pump, an exhaust pipe and an exhaust fan; the purification tower is arranged vertically, and a circulating water tank, an air-homogenizing layer, a gas-liquid fusion layer, a first filling layer, a first spray layer, a second filling layer, a second spray layer, a gas-liquid separation layer, a water-proof layer and an air layer are formed in the purification tower, which are connected in sequence from bottom to top; an exhaust gas inlet connected to the air-homogenizing layer is provided on the side of the lower end of the purification tower, and an air outlet connected to the air layer is provided at the top center of the purification tower;

[0007] The gas-liquid fusion layer comprises a lower cover and an upper cover, wherein the center of the upper surface of the lower cover is provided with a water receiving cavity, wherein an atomizing device is arranged in the water receiving cavity, and the lower cover is provided with a plurality of lower through grooves, wherein the plurality of lower through grooves are distributed around the outer periphery of the water receiving cavity; the upper cover is located directly above the lower cover, and a fusion space is formed between the upper cover and the lower cover, wherein the center of the bottom surface of the upper cover is a closed surface, wherein the area of ​​the closed surface is smaller than the area of ​​the water receiving cavity, and the upper cover is provided with a plurality of upper through grooves, wherein the plurality of upper through grooves and the plurality of lower through grooves are arranged staggered with each other;

[0008] The first spray layer has a first spray pipe, which extends transversely, and its two ends are respectively connected to the inner walls of the purification tower on both sides, and a plurality of first spray heads are arranged at intervals along the axial direction of the first spray pipe at the bottom of the first spray pipe;

[0009] The second spray layer has a second spray pipe, which extends transversely, and its two ends are respectively connected to the inner walls of the purification tower on both sides, and a plurality of second spray heads are arranged at intervals along the axial direction of the second spray pipe at the bottom of the second spray pipe;

[0010] The input end of the spray pump is connected to the circulating water tank, and the output end of the spray pump is connected to the first spray pipe and the second spray pipe; the output port of the dosing pump is connected to the circulating water tank;

[0011] One end of the exhaust pipe is connected to the air outlet; the input end of the exhaust fan is connected to the other end of the exhaust pipe, and the output end of the exhaust fan is connected to a vertically extending air outlet pipe.

[0012] As a preferred solution, the fillers in the first filling layer and the second filling layer are both ceramic ball rings.

[0013] As a preferred solution, the filler in the waterproof layer is anhydrous calcium chloride particles.

[0014] As a preferred solution, a pH detector is provided in the gas-liquid separation layer.

[0015] As a preferred solution, a humidity detector is provided in the air layer.

[0016] As a preferred solution, an electrodeless lamp is arranged on the inner peripheral side of the air layer, and the outer periphery of the lamp tube of the electrodeless lamp is coated with a titanium dioxide layer.

[0017] As a preferred solution, it further includes a controller, which is connected to the spray pump, the dosing pump, the exhaust fan, the pH detector, the electrodeless lamp, the humidity detector and the atomization device.

[0018] An ultra-clean exhaust gas treatment method, using the above-mentioned ultra-clean exhaust gas treatment system, includes the following steps:

[0019] (1) Turn on the exhaust fan to exhaust air, so that negative pressure is formed in the purification tower, and the exhaust gas enters the uniform gas layer from the exhaust gas inlet; before the exhaust fan is turned on, the dosing pump injects the medicine into the circulating water tank, and then the spray pump extracts the medicine in the circulating water tank and sprays water downward through the first nozzle and the second nozzle;

[0020] (2) The waste gas passes through the lower groove and enters the gas-liquid fusion layer. At this time, the atomizer atomizes the liquid medicine flowing into the water receiving chamber from above into water vapor, so that the waste gas and water vapor can fully contact, fuse and react. Some substances formed after the reaction fall into the circulating water tank with the liquid medicine;

[0021] (3) The remaining gas passes through the upper groove and enters the first filling layer and the first spraying layer. The gas and the liquid medicine continue to contact and fuse. Some of the substances formed after the reaction flow into the circulating water tank with the liquid medicine.

[0022] (4) The unreacted gas continues to flow upward into the second filling layer and the second spraying layer, and the gas and the liquid continue to contact and fuse, and some of the substances formed after the reaction flow into the circulating water tank with the liquid;

[0023] (5) Finally, the gas with moisture and unreacted enters the gas-liquid separation layer for gas-liquid separation;

[0024] (6) After gas-liquid separation, the gas enters the water-proof layer for water-proof drying;

[0025] (7) The gas that has been treated with water isolation enters the air layer;

[0026] (8) The purified gas passes through the air outlet into the exhaust pipe and is discharged through the outlet pipe.

[0027] As a preferred solution, in step (7), the electrodeless lamp irradiates the titanium dioxide layer, which has strong oxidizing properties, decomposes harmful substances, and kills bacteria in the gas; at the same time, the humidity detector detects the humidity of the gas and feeds back to the controller, which controls the water volume of the spray pump.

[0028] Compared with the prior art, the present invention has obvious advantages and beneficial effects. Specifically, it can be seen from the above technical solution that:

[0029] 1. This product can realize multiple spraying of waste gas by setting an integrated circulating water tank, a gas-homogenizing layer, a gas-liquid fusion layer, a first filling layer, a first spraying layer, a second filling layer, a second spraying layer, a gas-liquid separation layer, a water-proof layer and an air layer. The atomizing device is used to atomize the medicine into water vapor, so that the waste gas and the water vapor can fully fuse and react to completely absorb the harmful substances in the waste gas. The structure is simple and easy to implement.

[0030] 2. This product is also equipped with a pH detector to detect the pH of the exhaust gas and feed it back to the controller to automatically control the output of the dosing pump and reduce labor costs.

[0031] 3. This product is also equipped with a humidity detector to detect the humidity of the exhaust gas and feed it back to the controller to automatically control the output of the spray pump and reduce labor costs.

[0032] 4. This product is also equipped with an electrodeless lamp and a titanium dioxide layer thereon. The titanium dioxide layer has strong oxidizing properties under the irradiation of the electrodeless lamp, which can effectively kill bacteria in the exhaust gas and decompose harmful substances.

[0033] In order to more clearly illustrate the structural features and effects of the present invention, the present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1is a partial cross-sectional view of a preferred embodiment of the present invention;

[0035] Figure 2 is a top view of a preferred embodiment of the present invention;

[0036] Figure 3 It is a schematic diagram of the control principle of a preferred embodiment of the present invention.

[0037] Description of the accompanying drawings:

[0038] 10. Purification tower 101, waste gas inlet

[0039] 102. Air outlet 103. Water receiving chamber

[0040] 104, lower slot 105, fusion space

[0041] 106, upper through slot 107, platform

[0042] 11. Circulating water tank 12. Gas layer

[0043] 13. Gas-liquid fusion layer 131. Lower cover

[0044] 132. Upper cover 133. Atomizing device

[0045] 14. First filling layer 15. First spraying layer

[0046] 151. First spray pipe 152. First spray head

[0047] 16. Second filling layer 17. Second spraying layer

[0048] 171. Second spray pipe 172. Second spray head

[0049] 18. Gas-liquid separation layer 19. Waterproof layer

[0050] 110, air layer 20, spray pump

[0051] 21. Connecting pipe 30. Dosing pump

[0052] 40. Exhaust pipe 50. Exhaust fan

[0053] 61. pH tester 62. Induction lamp

[0054] 621, titanium dioxide layer 63, humidity detector

[0055] 64. Exhaust pipe 65. Testing platform

[0056] 66. Transparent window 70. Controller. DETAILED DESCRIPTION

[0057] Please refer to Figures 1 to 3 As shown, it shows the specific structure of an ultra-clean exhaust gas treatment system of a preferred embodiment of the present invention, including a purification tower 10, a spray pump 20, a dosing pump 30, an exhaust pipe 40 and an exhaust fan 50.

[0058] The purification tower 10 is arranged vertically, and a circulating water tank 11, an aeration layer 12, a gas-liquid fusion layer 13, a first filling layer 14, a first spray layer 15, a second filling layer 16, a second spray layer 17, a gas-liquid separation layer 18, a waterproof layer 19 and an air layer 110 are formed in the purification tower 10, which are connected in sequence from bottom to top. A waste gas inlet 101 connected to the aeration layer 12 is opened on the side of the lower end of the purification tower 10, and an air outlet 102 connected to the air layer 110 is opened at the top center of the purification tower 10.

[0059] The gas-liquid fusion layer 13 includes a lower cover 131 and an upper cover 132. The center of the upper surface of the lower cover 131 is provided with a water receiving chamber 103, and an atomizer 133 is arranged in the water receiving chamber 103. The lower cover 131 is provided with a plurality of lower through grooves 104, and the plurality of lower through grooves 104 are distributed around the outer periphery of the water receiving chamber 103; the upper cover 132 is located directly above the lower cover 131, and a fusion space 105 is formed between the upper cover 132 and the lower cover 131. The center of the bottom surface of the upper cover 132 is a closed surface, and the area of ​​the closed surface is smaller than the area of ​​the water receiving chamber 103. The upper cover 132 is provided with a plurality of upper through grooves 106, and the plurality of upper through grooves 106 and the plurality of lower through grooves 104 are staggered with each other.

[0060] The fillers in the first filling layer 14 and the second filling layer 16 are both ceramic ball rings. The ceramic ball rings have excellent acid and heat resistance and can withstand corrosion from various inorganic acids, organic acids and organic solvents except hydrofluoric acid. Gas and liquid can pass through evenly, with a long residence time and sufficient contact to achieve a better absorption effect. At the same time, the gaps between the ceramic ball rings can reduce the resistance to gas rising and reduce the pressure drop of the purification tower 10. Of course, the fillers can also be fillers made of other corrosion-resistant materials.

[0061] The first spray layer 15 has a first spray pipe 151 therein. The first spray pipe 151 extends transversely, and its two ends are respectively connected to the inner walls of the purification tower 10 on both sides. A plurality of first spray heads 152 are arranged axially spaced apart from each other at the bottom of the first spray pipe 151 .

[0062] The second spray layer 17 has a second spray pipe 171 therein. The second spray pipe 171 extends transversely, and its two ends are respectively connected to the inner walls of the purification tower 10 on both sides. The bottom of the second spray pipe 171 is provided with a plurality of second nozzles 172 arranged axially and spaced apart from each other.

[0063] The gas-liquid separation layer 18 is used to separate gas and liquid. A pH detector 61 is provided in the gas-liquid separation layer 18. The pH detector 61 is used to detect the pH of the gas and liquid.

[0064] The waterproof layer 19 is used to demist the gas. The filler in the waterproof layer 19 is anhydrous calcium chloride particles. The anhydrous calcium chloride has good stability and is difficult to react with other substances except water. It has a high water absorption rate. After completely absorbing moisture, it will fuse with water into a gel when encountering high temperature. It is not easy to evaporate and can be reused. Of course, the filler can also be other chemically stable desiccants.

[0065] The air layer 110 is in the shape of a cone, and its inner side surface is an inclined surface, and an electrodeless lamp 62 is arranged on the inner side surface. The outer periphery of the lamp tube of the electrodeless lamp 62 is coated with a titanium dioxide layer 621. The titanium dioxide layer 621 has a strong oxidation ability under the irradiation of the electrodeless lamp 62, which decomposes harmful substances in the gas, kills bacteria in the gas, and removes odors; and a humidity detector 63 is also arranged in the air layer 110 to detect the water absorption effect of the waterproof layer 19.

[0066] The input end of the spray pump 20 is connected to the circulating water tank 11, and the output end of the spray pump 20 is connected to the first spray pipe 151 and the second spray pipe 171. In this embodiment, the lower end side of the purification tower 10 has a platform 107, and the spray pump 20 is installed on the platform 107. The output end of the spray pump 20 is connected to the first spray pipe 151 and the second spray pipe 171 through a connecting pipe 21, and the connecting pipe 21 is located on the outer side of the purification tower 10.

[0067] The output port of the dosing pump 30 is connected to the circulating water tank 11 . In this embodiment, the dosing pump 30 is located outside the purification tower 10 .

[0068] One end of the exhaust pipe 40 is connected to the air outlet 102 . In the present embodiment, the exhaust pipe 40 is in a horizontal S-shape.

[0069] The input end of the exhaust fan 50 is connected to the other end of the exhaust pipe, and the output end of the exhaust fan 50 is connected to a vertically extending air outlet pipe 64. In addition, a detection platform 65 is arranged beside the air outlet pipe 64.

[0070] Furthermore, a plurality of transparent viewing windows 66 are provided on the outer peripheral side of the purification tower 10 to facilitate viewing of the conditions inside the purification tower 10 .

[0071] And, it further includes a controller 70, which is connected to the spray pump 20, the dosing pump 30, the exhaust fan 50, the pH detector 61, the electrodeless lamp 62, the humidity detector 63 and the atomization device 133. The controller 70 is a PLC controller, and its specific structure and working principle are all existing technologies. The specific structure and working principle of the controller 70 are not described in detail here.

[0072] The present invention also discloses a method for treating ultra-clean exhaust gas, which uses the above-mentioned ultra-clean exhaust gas treatment system and includes the following steps:

[0073] (1) The exhaust fan 50 is turned on to exhaust air, so that negative pressure is formed in the purification tower 10, and the exhaust gas enters the uniform gas layer 12 from the exhaust gas inlet 101; before the exhaust fan 50 is turned on, the dosing pump 30 injects the medicine into the circulating water tank 11, and then the spray pump 20 extracts the medicine in the circulating water tank 11 and sprays water downward through the first nozzle 152 and the second nozzle 172.

[0074] (2) The waste gas passes through the lower groove 104 and enters the gas-liquid fusion layer 13. At this time, the atomizing device 133 atomizes the medicine flowing into the water receiving chamber 103 from above into water vapor, so that the waste gas and the water vapor can fully contact, fuse and react. Some substances formed after the reaction fall into the circulating water tank 11 with the medicine.

[0075] (3) The remaining gas passes through the upper groove 106 and enters the first filling layer 14 and the first spraying layer 15. The gas and the liquid medicine continue to contact and fuse, and some of the substances formed after the reaction flow into the circulating water tank 11 along with the liquid medicine.

[0076] (4) The unreacted gas continues to flow upward into the second filling layer 16 and the second spray layer 17, and the gas and the liquid medicine continue to contact and fuse with each other. Part of the substances formed after the reaction flow into the circulating water tank 11 along with the liquid medicine.

[0077] (5) Finally, the gas containing moisture and not reacted enters the gas-liquid separation layer 18 , and the pH detector 61 measures the pH value of the humid gas and feeds it back to the controller 70 . The controller 70 compares the measured pH value with the standard value to control the dosage of the dosing pump 30 .

[0078] (6) After gas-liquid separation, the gas enters the water-proof layer 19 and contacts with the anhydrous calcium chloride particles therein, so that the water vapor in the gas is absorbed by the anhydrous calcium chloride particles, thereby drying the gas.

[0079] (7) The gas that has undergone water-proof treatment enters the air layer 110, and the electrodeless lamp 62 irradiates the titanium dioxide layer 621, which has strong oxidizing properties, decomposes harmful substances, and kills bacteria in the gas. At the same time, the humidity detector 63 detects the humidity of the gas and feeds back to the controller 70, which controls the water volume of the spray pump 20.

[0080] (8) The purified gas passes through the gas outlet 102 into the exhaust pipe 40 and is discharged through the gas outlet pipe 64.

[0081] The design emphasis of the present invention is:

[0082] 1. This product can realize multiple spraying of waste gas by setting an integrated circulating water tank, a gas-homogenizing layer, a gas-liquid fusion layer, a first filling layer, a first spraying layer, a second filling layer, a second spraying layer, a gas-liquid separation layer, a water-proof layer and an air layer. The atomizing device is used to atomize the medicine into water vapor, so that the waste gas and the water vapor can fully fuse and react to completely absorb the harmful substances in the waste gas. The structure is simple and easy to implement.

[0083] 2. This product is also equipped with a pH detector to detect the pH of the exhaust gas and feed it back to the controller to automatically control the output of the dosing pump and reduce labor costs.

[0084] 3. This product is also equipped with a humidity detector to detect the humidity of the exhaust gas and feed it back to the controller to automatically control the output of the spray pump and reduce labor costs.

[0085] 4. This product is also equipped with an electrodeless lamp and a titanium dioxide layer thereon. The titanium dioxide layer has strong oxidizing properties under the irradiation of the electrodeless lamp, which can effectively kill bacteria in the exhaust gas and decompose harmful substances.

[0086] The above description is only a preferred embodiment of the present invention and does not limit the technical scope of the present invention. Therefore, any slight modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. An ultra-clean exhaust gas treatment system, characterized in that: The purification tower comprises a purification tower, a spray pump, a dosing pump, an exhaust pipe and an exhaust fan; the purification tower is arranged vertically, and a circulating water tank, an air-distributing layer, an air-liquid fusion layer, a first filling layer, a first spray layer, a second filling layer, a second spray layer, an air-liquid separation layer, a water-proof layer and an air layer are formed in the purification tower, which are connected in sequence from bottom to top; an exhaust gas inlet connected to the air-distributing layer is provided on the side of the lower end of the purification tower, and an air outlet connected to the air layer is provided at the center of the top of the purification tower; The gas-liquid fusion layer comprises a lower cover and an upper cover, the center of the upper surface of the lower cover is provided with a water receiving cavity, an atomizing device is arranged in the water receiving cavity, a plurality of lower through grooves are provided on the lower cover, and the plurality of lower through grooves are distributed around the outer periphery of the water receiving cavity; the upper cover is located directly above the lower cover, a fusion space is formed between the upper cover and the lower cover, the center of the bottom surface of the upper cover is a closed surface, the area of ​​the closed surface is smaller than the area of ​​the water receiving cavity, a plurality of upper through grooves are provided on the upper cover, and the plurality of upper through grooves and the plurality of lower through grooves are arranged staggered with each other; The first spray layer has a first spray pipe, which extends transversely, and its two ends are respectively connected to the inner walls of the purification tower on both sides, and a plurality of first spray heads are arranged at intervals along the axial direction of the first spray pipe at the bottom of the first spray pipe; The second spray layer has a second spray pipe, which extends transversely, and its two ends are respectively connected to the inner walls of the purification tower on both sides, and a plurality of second spray heads are arranged at intervals along the axial direction of the second spray pipe at the bottom of the second spray pipe; The input end of the spray pump is connected to the circulating water tank, and the output end of the spray pump is connected to the first spray pipe and the second spray pipe; the output port of the dosing pump is connected to the circulating water tank; One end of the exhaust pipe is connected to the air outlet; the input end of the exhaust fan is connected to the other end of the exhaust pipe, and the output end of the exhaust fan is connected to a vertically extending air outlet pipe; The fillers in the first filling layer and the second filling layer are both ceramic ball rings; the filler in the waterproof layer is anhydrous calcium chloride particles.

2. The ultra-clean exhaust gas treatment system according to claim 1 is characterized in that: The gas-liquid separation layer is provided with a pH detector.

3. The ultra-clean exhaust gas treatment system according to claim 2 is characterized in that: A humidity detector is arranged in the air layer.

4. The ultra-clean exhaust gas treatment system according to claim 3 is characterized in that: An electrodeless lamp is arranged on the inner peripheral side of the air layer, and the outer periphery of the lamp tube of the electrodeless lamp is coated with a titanium dioxide layer.

5. The ultra-clean exhaust gas treatment system according to claim 4 is characterized in that: The invention further comprises a controller, wherein the controller is connected to a spray pump, a dosing pump, an exhaust fan, a pH detector, an electrodeless lamp, a humidity detector and an atomizing device.

6. A method for treating ultra-clean exhaust gas, characterized in that: The ultra-clean exhaust gas treatment system according to any one of claims 1 to 5 comprises the following steps: (1) Turn on the exhaust fan to exhaust air, so that negative pressure is formed in the purification tower, and the exhaust gas enters the uniform gas layer from the exhaust gas inlet; before the exhaust fan is turned on, the dosing pump injects the medicine into the circulating water tank, and then the spray pump extracts the medicine in the circulating water tank and sprays water downward through the first nozzle and the second nozzle; (2) The waste gas passes through the lower groove and enters the gas-liquid fusion layer. At this time, the atomizer atomizes the liquid medicine flowing into the water receiving chamber from above into water vapor, so that the waste gas and water vapor can fully contact, fuse and react. Some substances formed after the reaction fall into the circulating water tank with the liquid medicine; (3) The remaining gas passes through the upper groove and enters the first filling layer and the first spraying layer. The gas and the liquid medicine continue to contact and fuse. Some of the substances formed after the reaction flow into the circulating water tank with the liquid medicine. (4) The unreacted gas continues to flow upward into the second filling layer and the second spraying layer, and the gas and the liquid continue to contact and fuse, and some of the substances formed after the reaction flow into the circulating water tank with the liquid; (5) Finally, the gas with moisture and unreacted enters the gas-liquid separation layer for gas-liquid separation; (6) After gas-liquid separation, the gas enters the water-proof layer for water-proof drying; (7) The gas that has been treated with water isolation enters the air layer; (8) The purified gas passes through the air outlet into the exhaust pipe and is discharged through the outlet pipe.

7. The method for treating ultra-clean exhaust gas according to claim 6, characterized in that: In the step (7), the electrodeless lamp irradiates the titanium dioxide layer, which has strong oxidizing properties, decomposes harmful substances, and kills bacteria in the gas; at the same time, the humidity detector detects the humidity of the gas and feeds back to the controller, which controls the water volume of the spray pump.

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