CN216125414U

CN216125414U - Pretreatment system for high-concentration acidic organic waste gas

Info

Publication number: CN216125414U
Application number: CN202121827746.1U
Authority: CN
Inventors: 舒健; 周朝锋; 张伟伟; 周宇强; 方振; 黄胥汉
Original assignee: Jiangxi Dongjiang Environmental Protection Technology Co ltd
Current assignee: Jiangxi Dongjiang Environmental Protection Technology Co ltd
Priority date: 2021-08-06
Filing date: 2021-08-06
Publication date: 2022-03-25
Anticipated expiration: 2031-08-06

Abstract

The utility model discloses a pretreatment system for high-concentration acidic organic waste gas, which belongs to the field of waste gas treatment, and specifically comprises a UV photolysis device, a fan, an activated carbon tank, an alkaline washing spray tower, a demister and a discharge device which are sequentially arranged along the direction of air flow; the fan is provided with a first air outlet and a second air outlet, and the first air outlet is communicated with the activated carbon tank through a pipeline; and the second air outlet is communicated with the alkaline washing spray tower through a pipeline. The utility model can effectively remove inorganic waste gas, VOC and halogenated hydrocarbon acidic waste gas in organic waste gas, has high organic waste gas removal rate and is more environment-friendly.

Description

Pretreatment system for high-concentration acidic organic waste gas

Technical Field

The utility model relates to the field of organic waste gas treatment, in particular to a pretreatment system for high-concentration acidic organic waste gas.

Background

In the dangerous waste disposal process, materials can often give off high-concentration acidic organic waste gas, and the industry mostly adopts negative pressure collection and Venturi NaHCO spraying₃And activated carbon, but NaHCO₃Only inorganic acid gases such as HCl and HF can be neutralized, and activated carbon only adsorbs Volatile Organic Compounds (VOC), and the combined action of both is not preferable.

For halogenated hydrocarbon acidic organic waste gas, the organic waste gas is treated by NaHCO₃The main reason is that the halogen is difficult to be separated from NaHCO₃The effect of the activated carbon on absorbing halogenated hydrocarbon is also influenced by halogenated groups of the activated carbon, and the whole molecule often shows electronegativity, which is consistent with the principle of electronegativity absorption of the activated carbon, so that the absorption effect is not ideal enough. Therefore, it is desirable to design a abatement system for mixed organic waste gases with halogenated hydrocarbons.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve at least one technical problem in the prior art and provides a pretreatment system for high-concentration acidic organic waste gas.

In order to achieve the purpose, the technical scheme provided by the utility model is as follows:

the utility model provides a be used for high concentration acid organic waste gas pretreatment systems, sets up UV photodissociation device, fan, activated carbon tank, alkali wash spray column, defroster and discharging equipment along the air current direction in proper order.

Preferably, the UV photolysis apparatus includes a UV photolysis tank and an ultraviolet lamp tube therein.

Preferably, the fan is provided with a first air outlet and a second air outlet, and the first air outlet is communicated with the activated carbon canister through a pipeline; and the second air outlet is communicated with the alkaline washing spray tower through a pipeline.

Preferably, the air inlet of the fan is provided with a VOC detection probe.

Preferably, the activated carbon tank comprises a tank body, the tank body is internally provided with an annular container, the outer wall of the annular container and the inner wall of the tank body are provided with a gap, the annular container is provided with a carbon loading port and a carbon outlet, the tank body is provided with a waste gas inlet and a waste gas outlet, the waste gas inlet is communicated with the gap, and the waste gas outlet is communicated with the middle cavity of the annular container.

Preferably, the inner wall of the tank is provided with a heating element.

Preferably, the surface of the annular container is provided with a vent hole.

Preferably, the annular container is filled with granular activated carbon.

The utility model has the beneficial effects that: according to the utility model, through the sequentially arranged UV photolysis device, the fan, the activated carbon tank, the alkaline washing spray tower, the demister and the discharge device, the UV photolysis device carries out photolysis on organic acid gas (halogenated hydrocarbon acid gas) to remove the alkaline washing spray tower, inorganic acid gas is firstly reacted, halogen is decomposed into HCl, HF and the like, most hydrocarbon groups are decomposed into micromolecular acids or carboxylic acids, the photolyzed acid organic gas passes through the photolysis box and then enters the activated carbon tank to complete high-efficiency adsorption, the residual HCl, HF and other integrally electronegative gas molecules enter the alkaline washing spray tank to be sprayed and absorbed, demisting is carried out for gas-liquid separation, and finally the tail gas reaches the standard and is discharged. In addition, through the VOC detection probe, if the VOC detection probe is qualified in detection, the VOC detection probe is directly pumped into the alkaline washing spray tower by the fan for treatment, and if the VOC detection probe is not qualified, the VOC detection probe is pumped into the activated carbon tank by the fan for adsorption treatment and then enters the alkaline washing spray tower, so that the organic gas removal rate is high, the environment is protected, and the environment is benefited. Meanwhile, the heating element is arranged on the inner wall of the activated carbon tank, so that the activated carbon tank can be heated in a relatively cold environment, the activated carbon adsorption can be more favorably carried out, and the stability of the temperature of the adsorption environment is maintained.

Drawings

FIG. 1 is a schematic structural diagram of a preferred embodiment of the present invention;

FIG. 2 is a schematic diagram of the construction of an activated carbon canister in a preferred embodiment of the present invention;

FIG. 3 is a top view of FIG. 2;

FIG. 4 is a schematic illustration of the construction of a demister in a preferred embodiment of the utility model;

in the figure, 100-alkaline washing spray tower, 200-demister, 201-gas-liquid filter screen, 300-UV photolysis device, 400-fan, 500-activated carbon tank, 501-tank body, 502-annular container, 503-waste gas inlet, 504-waste gas outlet, 505-carbon loading port, 506-carbon outlet, 600-discharging device and 700-VOC detection probe.

Detailed Description

Reference will now be made in detail to the present preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like elements throughout.

In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and larger, smaller, larger, etc. are understood as excluding the number, and larger, smaller, inner, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.

Referring to fig. 1 to 4, a preferred embodiment of the present invention:

a UV photolysis device 300, a fan 400, an activated carbon tank 500, an alkaline washing spray tower 100, a demister 200 and a discharge device 600 are sequentially arranged along the direction of air flow, and the discharge device 600 can be a chimney.

In the preferred embodiment, the UV photolysis apparatus 300 performs photolysis on organic acid gas (halogenated hydrocarbon acid gas), halogen is decomposed into HCl, HF, etc., most of hydrocarbon groups are decomposed into micromolecular acids or carboxylic acids, the photolyzed acid gas enters the activated carbon tank 500 after passing through the photolysis tank to complete high-efficiency adsorption, and the remaining gas molecules with overall electronegativity, such as HCl, HF, etc., enter the alkaline washing spray tank to be sprayed and absorbed, and then are demisted to perform gas-liquid separation, so that the tail gas finally reaches the standard and is discharged, thereby solving the problem that the halogenated hydrocarbon acid gas in the organic waste gas cannot be completely removed by only using an alkaline solution spray tower and/or activated carbon in the conventional manner.

As a preferred embodiment of the present invention, it may also have the following additional technical features:

the UV photolysis apparatus 300 includes a UV photolysis chamber and an ultraviolet lamp tube therein, and ozone generated by irradiation of the ultraviolet lamp tube generates hydroxyl radicals to decompose halogenated hydrocarbons and other organic volatile gases. The halogen is decomposed into HCl, HF, etc., while the hydrocarbon group is mostly decomposed into small molecular acids or carboxylic acids, and the acid organic gas which is photolyzed enters the activated carbon canister after passing through the photolysis box.

The fan 400 is provided with a first air outlet and a second air outlet, and the first air outlet is communicated with the activated carbon canister 500 through a pipeline; the second air outlet is communicated with the alkaline washing spray tower 100 through a pipeline to form a bypass.

The air inlet of the fan 400 is provided with a VOC detection probe 700 for detecting the VOC content in the treated waste gas, if the waste gas is qualified, the waste gas is directly discharged from the second air outlet and enters the alkaline washing spray tower 100 through a bypass for treatment, if the waste gas is unqualified in detection, the waste gas enters the activated carbon tank 500 through the first air outlet for adsorption treatment of VOC, in some embodiments, the waste gas outlet 504 on the activated carbon tank 500 is provided with the VOC detection probe, and the waste gas enters the alkaline washing spray tower 100 for treatment after the waste gas is qualified in detection.

The activated carbon canister 500 comprises a canister body 501, an annular container 502 is arranged in the canister body 501, a gap is formed between the outer wall of the annular container 502 and the inner wall of the canister body 501, a carbon loading port 505 and a carbon outlet 506 are arranged on the annular container 502, an exhaust gas inlet 503 and an exhaust gas outlet 504 are arranged on the canister body 501, the exhaust gas inlet 503 is communicated with the gap, and the exhaust gas outlet 504 is communicated with the middle cavity of the annular container 502. The surface of the annular container 502 is provided with a vent hole. The annular container 502 is filled with granular activated carbon.

The exhaust gas enters the gap through the exhaust gas inlet 503, is subjected to adsorption treatment by the granular activated carbon, and the treated exhaust gas is discharged through the exhaust gas outlet 504.

The inner wall of the tank body 501 is provided with a heating element, and the heating element is started in a low-temperature weather, so that the active carbon adsorption in the period is performed in an environment with stable temperature, and the adsorption performance is more excellent.

In some embodiments, the demister is a gas-liquid filter 201 disposed in the pipeline, and can intercept mist entrained in the gas to realize gas-liquid separation, and more specifically, an acid gas detection probe is disposed at an air outlet of the demister, and if the detection is qualified, the acid gas detection probe can be discharged, and if the detection is not qualified, the acid gas detection probe continues to return to the UV photolysis device 300 to continue to decompose.

The above additional technical features can be freely combined and used in superposition by those skilled in the art without conflict.

The above description is only a preferred embodiment of the present invention, and the technical solutions that achieve the objects of the present invention by basically the same means are all within the protection scope of the present invention.

Claims

1. A pretreatment system for high-concentration acidic organic waste gas is characterized in that: the UV photolysis device (300), the fan (400), the activated carbon tank (500), the alkaline washing spray tower (100), the demister (200) and the discharge device (600) are sequentially arranged along the airflow direction;

the fan (400) is provided with a first air outlet and a second air outlet, and the first air outlet is communicated with the activated carbon tank (500) through a pipeline; the second air outlet is communicated with the alkaline washing spray tower (100) through a pipeline.

2. The pretreatment system for high-concentration acidic organic waste gas according to claim 1, wherein: the UV photolysis device (300) comprises a UV photolysis box and an ultraviolet lamp tube positioned in the UV photolysis box.

3. The pretreatment system for high-concentration acidic organic waste gas according to claim 1, wherein: and a VOC detection probe (700) is arranged on an air inlet of the fan (400).

4. The pretreatment system for high-concentration acidic organic waste gas according to claim 1, wherein: activated carbon tank (500) is including a jar body (501), be provided with annular container (502) in jar body (501), the outer wall of annular container (502) has a clearance with jar body (501) inner wall, be provided with dress charcoal mouth (505) and play charcoal mouth (506) on annular container (502), be provided with waste gas import (503) and exhaust outlet (504) on jar body (501), waste gas import (503) with the clearance intercommunication, exhaust outlet (504) with the middle cavity intercommunication of annular container (502).

5. The pretreatment system for high-concentration acidic organic waste gas according to claim 4, wherein: the inner wall of the tank body (501) is provided with a heating element.

6. The pretreatment system for high-concentration acidic organic waste gas according to claim 4, wherein: the surface of the annular container (502) is provided with a vent hole.

7. The pretreatment system for high-concentration acidic organic waste gas according to claim 4, wherein: the annular container (502) is filled with granular activated carbon.