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Treatment method of waste gas containing organic pollutants

A technology of organic pollutants and treatment methods, which is applied in the field of waste gas treatment, can solve the problems of difficult long-term stable operation of biological filters and poor pollutant removal effect, and achieves the effect of increasing the contact probability and improving the removal efficiency.

Pending Publication Date: 2022-02-18
青岛万慧源环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at the problem in the prior art that the biological filter is difficult to run stably for a long time caused by the direct use of the biological filter to treat the waste gas, and the problem that the pollutant removal effect is not good due to the low contact probability in the treatment of organic pollutants in the waste gas, the present invention A treatment method for waste gas containing organic pollutants is provided. Before the biofilter, the waste gas is first sprayed with water mist containing lyase to increase the contact efficiency between the lyase and the waste gas; The method of passing into the biofilter increases the contact efficiency between the organic pollutants in the exhaust gas and the filler of the biofilter, thereby improving the removal efficiency of organic pollutants in the exhaust gas

Method used

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  • Treatment method of waste gas containing organic pollutants
  • Treatment method of waste gas containing organic pollutants
  • Treatment method of waste gas containing organic pollutants

Examples

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Effect test

Embodiment 1

[0042] For waste gas containing pollutants such as hydrogen sulfide, sulfur dioxide, methane, toluene, xylene, etc., the content of each pollutant in the intake air is shown in Table 1. This embodiment provides a treatment method for waste gas containing organic pollutants, including:

[0043] In the pretreatment step, the exhaust gas enters the belt dust collector under the action of the induced draft fan for dust removal, and the purified exhaust gas is subjected to the following steps:

[0044] 1) Pass the dedusted waste gas into the absorption tower equipped with slaked lime to remove acid pollutants such as hydrogen sulfide and sulfur dioxide contained in the waste gas;

[0045] 2) Laccase spray treatment:

[0046] The activity unit of the laccase used in this embodiment is about 100,000 u / g, and the addition amount in water is 5ppm. A sprayer is installed in the spray tower to spray the aqueous solution containing laccase from top to bottom in the form of water mist. Th...

Embodiment 2

[0062] For waste gas containing pollutants such as hydrogen sulfide, methane, toluene, xylene, etc., the content of each pollutant in the intake air is shown in Table 3. This embodiment provides a treatment method for waste gas containing organic pollutants, including:

[0063] In the pretreatment step, the exhaust gas enters the belt dust collector under the action of the induced draft fan for dust removal, and the purified exhaust gas is subjected to the following steps:

[0064] 1) Pass the dedusted exhaust gas into the absorption tower equipped with slaked lime to remove acidic and odorous pollutants such as hydrogen sulfide contained in the exhaust gas;

[0065] 2) Laccase spray treatment:

[0066] The activity unit of the laccase used in this example is about 100,000 u / g, and the addition amount in water is 10ppm. A sprayer is installed in the spray tower to spray the aqueous solution containing laccase from top to bottom in the form of water mist. The exhaust gas is pa...

Embodiment 3

[0076] The treatment method in this example is basically the same as that in Example 2, except that the organic pollutants contained in the waste gas include hydrogen sulfide, methane, toluene, xylene, etc., and the contents are shown in Table 4.

[0077] Pollutant content in the inlet and outlet gas in the embodiment 3 of table 4

[0078]

[0079] The biofilter in this embodiment has been in stable operation for 180 days for a long time, and can still reach the concentration of total hydrocarbons at 15mg / m3. 3 the following.

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Abstract

The invention discloses a treatment method of waste gas containing organic pollutants, and belongs to the technical field of waste gas treatment. The treatment method comprises the following steps: 1) introducing the waste gas subjected to particle removal by filtration into a slaked lime absorption tower, and removing acidic pollutants contained in the waste gas; 2) introducing the gas treated in the step 1) into a spray tower, and spraying water mist containing lyase in the spray tower to remove organic pollutants contained in the waste gas; 3) carrying out demisting treatment on the gas discharged from the spray tower in the step 2), and introducing the gas into a biological filter; and 4) treating the gas treated in the step 3) through a drying tower, and introducing the treated gas into an activated carbon absorption tower. After lyase is added into water, the lyase is sprayed out in a water mist manner, so that the water mist containing the lyase is fully mixed and contacted with the waste gas, and organic matters in the waste gas are more fully degraded.

Description

technical field [0001] The invention belongs to the field of pollutant treatment, and more specifically relates to a treatment method for waste gas containing organic pollutants. Background technique [0002] During the sewage treatment process, a certain amount of harmful and odorous gases are usually produced, which will have a certain impact on the factory area and the surrounding environment. The harmful and odorous gas components produced in the sewage treatment process vary with the sewage water quality and sewage treatment process. Organic wastewater contains some gases containing volatile organic compounds (VOCs). Under normal pressure, the boiling point of VOCs is 50°C to 260°C. VOCs mainly include alkanes, aromatics, alkenes, halocarbons, esters, aldehydes, ketones, etc., including organic chlorides, freon series, organic ketones, amines, alcohols, ethers, esters, acids and petroleum hydrocarbon compounds, etc. VOCs exhaust gas is directly discharged into the at...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/84B01D53/44B01D53/75B01D53/04
CPCB01D53/84B01D53/44B01D53/75B01D53/04B01D2257/708B01D2253/102Y02A50/20
Inventor 焦阳
Owner 青岛万慧源环保科技有限公司
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