Waste gas treatment system

Abstract

The invention relates to the technical field of waste gas treatment, in particular to a waste gas treatment system which can improve the waste gas treatment effect by sequentially arranging a first treatment device, a second treatment device, a first buffer device, a second buffer device, an adsorption device and a filtering device. Besides, a first buffer device is arranged on the inlet side of the first treatment device, a second buffer device is arranged on the inlet side of the second treatment device, and the first buffer device and the second buffer device can slow down the flowing speed of the waste gas, so that the gas can uniformly enter the treatment devices, and the waste gas is treated by the treatment devices. In addition, fillers of different grades are arranged in the gas inlet area and the gas outlet area respectively, harmful substances in waste gas can be adsorbed through the fillers of different grades, meanwhile, gas can be effectively blocked, the flowing speed of the gas can be reduced, meanwhile, the flowing uniformity of the gas can be improved, and therefore the service life of the gas is prolonged. And the waste gas treatment effect can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of waste gas treatment, and specifically provides a waste gas treatment system. Background Art

[0002] Industrial waste gas refers to the gas containing pollutants generated by fuel combustion or technological processes in industrial plants. Usually, industrial waste gas needs to pass through a waste gas treatment device to purify the waste gas before being discharged into the atmosphere.

[0003] Currently, common industrial waste gas treatment methods include electrocapture method, washing method, adsorption method and filtration method. The above four methods play an important role in gas purification during actual use. However, if the waste gas volume is not constant, when the waste gas volume is large, if the waste gas cannot meet the standards after being treated by the waste gas treatment device, and when the waste gas volume is small, it will lead to too high waste gas treatment costs.

[0004] Therefore, a new technical solution is needed in this field to solve the above problems. Summary of the Invention

[0005] The present invention aims to solve the above technical problems, that is, to solve the problem that the unevenness of waste gas treatment effect is caused by the non-constant waste gas volume during the existing waste gas treatment process.

[0006] The present application also provides a waste gas treatment system, which includes a first buffer device, a first treatment device, a second buffer device, a second treatment device, an adsorption device and a filtration device connected in sequence;

[0007] A first buffer device is arranged on the inlet side of the first treatment device, and a second buffer device is arranged on the inlet side of the second treatment device;

[0008] The first buffer device includes a first device body. The space in the first device body is divided into a first intake area and a first outlet area that communicate with each other. A first intake port and a first outlet port connected to the inlet side of the first treatment device are opened on the first device body. The first intake port communicates with the first intake area, and the first outlet port communicates with the first outlet area; the first intake area is arranged below the first outlet area; different grades of first fillers are arranged in the first intake area and the first outlet area respectively;

[0009] The second buffer device includes a second device body. The space inside the second device body is divided into a second intake area and a second outlet area that communicate with each other. A second intake port connected to the first processing device and a second outlet port connected to the second processing device are provided on the second device body. The second intake port communicates with the second intake area, and the second outlet port communicates with the second outlet area. The second intake area is provided below the second outlet area. Different gradings of second fillers are provided in the first intake area and the first outlet area respectively.

[0010] In a preferred technical solution of the above waste gas treatment system, the first filler in the first intake area includes particles of 20 - 50 cm, particles of 1 - 10 cm, particles of 1 - 10 mm, and particles of 0.1 - 1 mm, and the weight ratio is (0.5 - 1):(1 - 2):(1 - 2):(2 - 6).

[0011] In a preferred technical solution of the above waste gas treatment system, the first filler in the first outlet area includes particles of 10 - 20 cm, particles of 1 - 10 cm, particles of 1 - 10 mm, particles of 0.1 - 1 mm, and 500 - 1000 μm, and the weight ratio is (0.3 - 0.5):(1 - 1.5):(1 - 3):(2 - 5):(2 - 6).

[0012] In a preferred technical solution of the above waste gas treatment system, the first filler in the second intake area includes particles of 10 - 20 cm, particles of 5 - 10 cm, particles of 1 - 5 mm, particles of 0.1 - 1 mm, and 500 - 1000 μm, and the weight ratio is (0.5 - 1):(0.8 - 1.5):(2 - 5):(2 - 5):(1 - 2).

[0013] In a preferred technical solution of the above waste gas treatment system, the first filler in the second outlet area includes particles of 5 - 10 cm, particles of 1 - 5 mm, particles of 0.1 - 1 mm, and particles of 500 - 1000 μm, and the weight ratio is (2 - 5):(3 - 10):(6 - 15):(6 - 15).

[0014] In a preferred technical solution of the above waste gas treatment system, both the first filler and the second filler are particles treated with a 2 - 3% aqueous solution of transparent Hansen glue.

[0015] In a preferred technical solution of the above waste gas treatment system, the first filler and the second filler are independently activated carbon and / or zeolite.

[0016] In a preferred technical solution of the above waste gas treatment system, activated carbon is provided in the adsorption device.

[0017] In the preferred technical solution of the above waste gas treatment system, the first treatment device and the second treatment device have the same structure, both including a third device body with an accommodation space, a treatment liquid and a spraying mechanism arranged in the accommodation space, as well as a connecting pipe and a circulation pump. The spraying mechanism is arranged above the treatment liquid. The third device body is provided with a third air inlet, a third air outlet, a third liquid inlet, a third liquid outlet and a circulation port that communicate with the accommodation space; the first end of the connecting pipe communicates with the spraying mechanism, and the second end is connected to the circulation port; the treatment liquids in the first treatment device and the second treatment device are different;

[0018] The third air inlet of the first treatment device communicates with the first air outlet, and the third air outlet communicates with the second air inlet;

[0019] The third air inlet of the second treatment device communicates with the second air outlet, and the third air outlet is connected to the adsorption device.

[0020] In the preferred technical solution of the above waste gas treatment system, the number of the second buffer devices is multiple, and the multiple second buffer devices are arranged in parallel. The inlet sides of the multiple second buffer devices converge and are connected to the first treatment device, and the outlet sides of the multiple second buffer devices converge and are connected to the second treatment device.

[0021] By sequentially arranging the first treatment device, the second treatment device, the first buffer device, the second buffer device, the adsorption device and the filtration device, the present invention can improve the treatment effect of waste gas. In addition, by arranging the first buffer device on the inlet side of the first treatment device and the second buffer device on the inlet side of the second treatment device, the first buffer device and the second buffer device can slow down the flow rate of the waste gas, so that the gas can enter the treatment device evenly, and the treatment device can treat the waste gas. In addition, by arranging different gradings of fillers in the inlet area and the outlet area respectively, the different gradings of fillers can not only adsorb harmful substances in the waste gas, but also effectively block the gas, slow down the flow rate of the gas, and at the same time increase the flow uniformity of the gas, thereby improving the treatment effect of the waste gas and solving the problem that the treatment effect of the waste gas is uneven due to the non-constant waste gas volume in the existing waste gas treatment process. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The following describes the preferred embodiments of the present invention with reference to the drawings, in which:

[0023] Figure 1 is a flowchart of the waste gas treatment system of the present invention.

[0024] REFERENCE SIGNS

[0025] 1. First buffer device; 2. First treatment device; 3. Second buffer device; 4. Second treatment device; 5. Adsorption device; 6. Filtration device. Detailed implementation manners

[0026] The preferred implementation manners of the present invention will be described below with reference to the accompanying drawings. Those skilled in the art should understand that these implementation manners are only used to explain the technical principle of the present invention and are not intended to limit the protection scope of the present invention.

[0027] It should be noted that in the description of the present invention, the terms indicating directions or positional relationships such as "upper", "lower", "left", "right", "front", "rear", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings. This is only for convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0028] In addition, it should also be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "connection", "setting", "installation" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] Combined with Figure 1 , the exhaust gas treatment system of the present application will be introduced. Among them Figure 1 is the flow chart of the exhaust gas treatment system of the present invention.

[0030] Based on the problem pointed out in the background art that the uneven exhaust gas treatment effect is caused by the non-constant exhaust gas volume in the existing exhaust gas treatment process, the present invention provides an exhaust gas treatment system, which includes a first buffer device 1, a first treatment device 2, a second buffer device 3, a second treatment device 4, an adsorption device 5, and a filtration device 6 connected in sequence;

[0031] A first buffer device 1 is arranged on the inlet side of the first treatment device 2, and a second buffer device 3 is arranged on the inlet side of the second treatment device 4;

[0032] The first buffer device 1 includes a first device body. The space inside the first device body is divided into a first intake area and a first outlet area that communicate with each other. A first intake port and a first outlet port connected to the inlet side of the first processing device 2 are provided on the first device body. The first intake port communicates with the first intake area, and the first outlet port communicates with the first outlet area. The first intake area is provided below the first outlet area. Different grades of first packing materials are respectively provided in the first intake area and the first outlet area.

[0033] The second buffer device 3 includes a second device body. The space inside the second device body is divided into a second intake area and a second outlet area that communicate with each other. A second intake port connected to the first processing device 2 and a second outlet port connected to the second processing device 4 are provided on the second device body. The second intake port communicates with the second intake area, and the second outlet port communicates with the second outlet area. The second intake area is provided below the second outlet area. Different grades of second packing materials are respectively provided in the first intake area and the first outlet area.

[0034] In the present invention, by sequentially arranging the first processing device 2, the second processing device 4, the first buffer device 1, the second buffer device 3, the adsorption device 5 and the filtration device 6, the treatment effect of the waste gas can be improved. In addition, by arranging the first buffer device 1 on the inlet side of the first processing device 2 and the second buffer device 3 on the inlet side of the second processing device 4, the first buffer device 1 and the second buffer device 3 can slow down the flow rate of the waste gas, so that the gas can enter the processing device evenly, and the processing device can treat the waste gas. In addition, by respectively arranging different grades of packing materials in the intake area and the outlet area, the different grades of packing materials can not only adsorb harmful substances in the waste gas, but also effectively block the gas, slow down the flow rate of the gas, and at the same time increase the flow uniformity of the gas, thereby improving the treatment effect of the waste gas and solving the problem that the treatment effect of the waste gas is uneven due to the non-constant waste gas volume in the existing waste gas treatment process.

[0035] Preferably, the first packing material in the first intake area includes particles of 20 - 50 cm, particles of 1 - 10 cm, particles of 1 - 10 mm, and particles of 0.1 - 1 mm, and the weight ratio is (0.5 - 1) : (1 - 2) : (1 - 2) : (2 - 6). More preferably, the weight ratio is 0.5 : 2 : 2 : 5. With this grade of first packing material, the flow rate of the waste gas entering the first intake area can be greatly reduced, which is beneficial for the first packing material to adsorb and treat the waste gas.

[0036] The first packing material in the first gas outlet area includes particles of 10 - 20 cm, 1 - 10 cm, 1 - 10 mm, 0.1 - 1 mm, and 500 - 1000 μm, and the weight ratio is (0.3 - 0.5):(1 - 1.5):(1 - 3):(2 - 5):(2 - 6). Preferably, the weight ratio is 0.5:(1 - 1.5):2:5:5. With this gradation of the first packing material, on the one hand, it can improve the uniformity of waste gas flow, and on the other hand, it is beneficial for the first packing material to adsorb and treat the waste gas.

[0037] Preferably, the first packing material in the second gas inlet area includes particles of 10 - 20 cm, 5 - 10 cm, 1 - 5 mm, 0.1 - 1 mm, and 500 - 1000 μm, and the weight ratio is (0.5 - 1):(0.8 - 1.5):(2 - 5):(2 - 5):(1 - 2). More preferably, the weight ratio is 0.7:1.5:3:4:1. With this gradation of the second packing material, on the one hand, it can improve the uniformity of waste gas flow, and on the other hand, it is beneficial for the second packing material to adsorb and treat the waste gas.

[0038] The first packing material in the second gas outlet area includes particles of 5 - 10 cm, 1 - 5 mm, 0.1 - 1 mm, and 500 - 1000 μm, and the weight ratio is (2 - 5):(3 - 10):(6 - 15):(6 - 15). More preferably, the weight ratio is 4:7:12:12. With this gradation of the second packing material, on the one hand, it can improve the uniformity of waste gas flow, and on the other hand, it is beneficial for the second packing material to adsorb and treat the waste gas.

[0039] In order to improve the treatment effect on the waste gas, both the first packing material and the second packing material are particles treated with a 2 - 3% aqueous solution of transparent Hansen glue. That is, the first packing material and the second packing material are soaked in a 2 - 3% aqueous solution of transparent Hansen glue for 24 h and then dried at room temperature.

[0040] Preferably, the first packing material and the second packing material are independently activated carbon and / or zeolite. The activated carbon and / or zeolite are soaked in a 2 - 3% aqueous solution of transparent Hansen glue for 24 h and then dried at room temperature.

[0041] Among them, when the first filler and / or the second filler is activated carbon and zeolite, there is no limitation on the activated carbon and zeolite, as long as they can remove harmful substances in the gas. For example, the mass ratio of activated carbon to zeolite is 1:1. In addition, the present application has no limitation on the activated carbon and zeolite in different gradation adsorption fillers. For example, the mass ratio of activated carbon to zeolite in the same particle size is 1:1, that is, the mass ratio of activated carbon to zeolite in particles of 10-20 mm is 1:1, the mass ratio of activated carbon to zeolite in particles of 5-10 cm is 1:1, the mass ratio of activated carbon to zeolite in particles of 1-5 mm is 1:1, the mass ratio of activated carbon to zeolite in particles of 0.1-1 mm is 1:1, and the mass ratio of activated carbon to zeolite in particles of 500-1000 μm is 1:1.

[0042] Preferably, activated carbon is provided in the adsorption device 5.

[0043] Preferably, the first treatment device 2 and the second treatment device 4 have the same structure, and both include a third device body having an accommodation space, a treatment liquid and a spraying mechanism provided in the accommodation space, as well as a connecting pipe and a circulation pump. The spraying mechanism is provided above the treatment liquid. The third device body is provided with a third air inlet, a third air outlet, a third liquid inlet, a third liquid outlet and a circulation port communicating with the accommodation space; the first end of the connecting pipe is communicated with the spraying mechanism, and the second end is connected with the circulation port; the treatment liquids in the first treatment device and the second treatment device are different; the third air inlet of the first treatment device 2 is communicated with the first air outlet, and the third air outlet is communicated with the second air inlet; the third air inlet of the second treatment device 4 is communicated with the second air outlet, and the third air outlet is connected with the adsorption device 5. By sequentially arranging the first treatment device and the second treatment device and adopting the spraying method, on the one hand, it can remove attachments such as organic matters, microorganisms, and oil stains in the gas, thereby improving the waste gas treatment effect. On the other hand, it can convert some malodorous substances such as ammonia and sulfides in the waste gas into odorless substances, so as to achieve the purpose of deodorization. In addition, by setting different treatment liquids in the first treatment device and the second treatment device, the treatment effect of the waste gas can be improved.

[0044] The treatment liquid in the first treatment device 2 is an alkaline treatment liquid, and the treatment liquid in the second treatment device 4 is an acidic treatment liquid; or the treatment liquid in the first treatment device 2 is an acidic treatment liquid, and the treatment liquid in the second treatment device 4 is an alkaline treatment liquid. By setting different treatment liquids in the first treatment device 2 and the second treatment device 43, the treatment effect of the waste gas can be improved. In addition, by adopting an alkaline treatment liquid, attachments such as organic matters, microorganisms, and oil stains in the gas can be removed, thereby improving the waste gas treatment effect. By adopting an acidic treatment liquid, some malodorous substances in the waste gas can be converted into odorless substances, achieving the purpose of deodorization.

[0045] Among them, the acidic treatment solution includes wood vinegar, citric acid, and Fenton's reagent; the alkaline treatment solution is a sodium hydroxide solution. Preferably, the weight parts in the alkaline treatment solution are 5-10 parts of wood vinegar, 3-5 parts of citric acid, and 1-2 parts of Fenton's reagent respectively; the mass concentration of sodium hydroxide in the sodium hydroxide solution is 2-5%. More preferably, the weight parts in the alkaline treatment solution are 8 parts of wood vinegar, 3 parts of citric acid, and 1.5 parts of Fenton's reagent respectively; the mass concentration of sodium hydroxide in the sodium hydroxide solution is 3%. By defining the components of the alkaline treatment solution and the acidic treatment solution, the treatment effect on waste gas can be improved.

[0046] Preferably, in order to further reduce the gas flow velocity and improve the uniformity of the gas flow velocity, the number of the second buffer devices 3 is multiple, the multiple second buffer devices 3 are arranged in parallel, and after the inlet sides of the multiple second buffer devices 3 converge, they are connected to the first treatment device 2, and after the outlet sides of the multiple second buffer devices 3 converge, they are connected to the second treatment device 4.

[0047] Taking a certain sewage treatment station as an example: the parameters of the waste gas passing through the purification process are: VOCs: 63 mg / m 3 、Particulate matter: 130 mg / m 3 , the waste gas concentration (dimensionless): 1200. After being treated by the purification system of this embodiment, the parameters of the discharged tail gas can reach: VOC ≤ 4 mg / m3, particulate matter ≤ 2 mg / m 3 , the waste gas concentration (dimensionless): ≤ 120.

[0048] Those skilled in the art can understand that although some embodiments described herein include certain features included in other embodiments rather than other features, the combination of the features of different embodiments means that it is within the scope of this application and forms different embodiments. For example, in the claims of this application, any one of the claimed embodiments can be used in any combination.

[0049] So far, the technical solution of the present invention has been described in combination with the preferred embodiments shown in the drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of the present invention.

Claims

1. An exhaust gas treatment system, characterized in that, The waste gas treatment system includes a first buffer device, a first treatment device, a second buffer device, a second treatment device, an adsorption device, and a filtration device that are connected in sequence; A first buffer device is provided on the inlet side of the first treatment device, and a second buffer device is provided on the inlet side of the second treatment device; The first buffer device includes a first device body. The space inside the first device body is divided into a first intake area and a first outlet area that communicate with each other. A first intake port and a first outlet port connected to the inlet side of the first treatment device are provided on the first device body. The first intake port communicates with the first intake area, and the first outlet port communicates with the first outlet area. The first intake area is provided below the first outlet area. Different gradings of first packing materials are provided in the first intake area and the first outlet area respectively; The second buffer device includes a second device body. The space inside the second device body is divided into a second intake area and a second outlet area that communicate with each other. A second intake port connected to the first treatment device and a second outlet port connected to the second treatment device are provided on the second device body. The second intake port communicates with the second intake area, and the second outlet port communicates with the second outlet area. The second intake area is provided below the second outlet area. Different gradings of second packing materials are provided in the first intake area and the first outlet area respectively.

2. The exhaust gas treatment system according to claim 1, wherein, The first packing material in the first intake area includes particles of 20 - 50 cm, particles of 1 - 10 cm, particles of 1 - 10 mm, and particles of 0.1 - 1 mm, and the weight ratio is (0.5 - 1) : (1 - 2) : (1 - 2) : (2 - 6).

3. The exhaust gas treatment system according to claim 1, wherein The first packing material in the first outlet area includes particles of 10 - 20 cm, particles of 1 - 10 cm, particles of 1 - 10 mm, particles of 0.1 - 1 mm, and particles of 500 - 1000 μm, and the weight ratio is (0.3 - 0.5) : (1 - 1.5) : (1 - 3) : (2 - 5) : (2 - 6).

4. The exhaust gas treatment system according to claim 1, wherein The first packing material in the second intake area includes particles of 10 - 20 cm, particles of 5 - 10 cm, particles of 1 - 5 mm, particles of 0.1 - 1 mm, and particles of 500 - 1000 μm, and the weight ratio is (0.5 - 1) : (0.8 - 1.5) : (2 - 5) : (2 - 5) : (1 - 2).

5. The exhaust gas treatment system according to claim 1, wherein The first packing material in the second outlet area includes particles of 5 - 10 cm, particles of 1 - 5 mm, particles of 0.1 - 1 mm, and particles of 500 - 1000 μm, and the weight ratio is (2 - 5) : (3 - 10) : (6 - 15) : (6 - 15).

6. The exhaust gas treatment system according to claim 5, characterized in that Both the first packing material and the second packing material are particles treated with a 2 - 3% aqueous solution of transparent Hansen glue.

7. The exhaust gas treatment system according to claim 1, wherein, The first packing material and the second packing material are independently activated carbon and / or zeolite.

8. The exhaust gas treatment system according to claim 1, characterized in that, Activated carbon is provided in the adsorption device.

9. The exhaust gas treatment system according to claim 1, wherein The structures of the first processing device and the second processing device are the same, and both include a third device body having an accommodation space, a processing liquid and a spraying mechanism disposed in the accommodation space, as well as a connecting pipe and a circulation pump. The spraying mechanism is disposed above the processing liquid. A third air inlet, a third air outlet, a third liquid inlet, a third liquid outlet and a circulation port communicating with the accommodation space are formed on the third device body; the first end of the connecting pipe communicates with the spraying mechanism, and the second end is connected to the circulation port; the processing liquids in the first processing device and the second processing device are different; The third air inlet of the first processing device communicates with the first air outlet, and the third air outlet communicates with the second air inlet; The third air inlet of the second processing device communicates with the second air outlet, and the third air outlet is connected to the adsorption device.

10. The exhaust gas treatment system according to claim 1, wherein The number of the second buffer devices is multiple, and the multiple second buffer devices are arranged in parallel. The inlet sides of the multiple second buffer devices converge and are connected to the first processing device, and the outlet sides of the multiple second buffer devices converge and are connected to the second processing device.

Images