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After-treatment process for exhaust gas formed after evaporation of colloidal waste

A waste and colloidal technology, which is applied in the field of post-treatment process in which colloidal waste is evaporated to form exhaust gas, can solve the problems of environment and surrounding residents' pollution, and the impact on the health of staff, so as to avoid pollution and avoid affecting staff Healthy, easy and safe handling process

Inactive Publication Date: 2020-06-19
广东睿泽环境科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, when domestic waste is processed, since domestic sewage, industrial concentrated waste liquid and sludge contain a large amount of water, it is generally necessary to dewater the waste. The method of dewatering generally includes direct drying Drying, mechanical dehydration or evaporative drying. Among them, evaporative drying can remove moisture in waste gas more quickly. When evaporative drying is used to evaporate and remove water from waste, it is difficult to avoid the presence of volatile organic substances in waste, etc. The overflow of hazardous substances will cause pollution to the environment and surrounding residents, and will also affect the health of workers who process domestic waste and industrial waste

Method used

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  • After-treatment process for exhaust gas formed after evaporation of colloidal waste
  • After-treatment process for exhaust gas formed after evaporation of colloidal waste

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preparation example Construction

[0029] In order to reduce the overflow of harmful substances in the colloidal waste and reduce the processing pressure of the subsequent biological trickling filter device, an embodiment also includes a preparation method of the colloidal waste, and the preparation method of the colloidal waste includes the following steps : provide waste, pass the waste and pH regulator into the first pH adjustment reaction kettle, adjust the pH of the waste to 6.8-7.2, and obtain neutral waste; mix sodium silicate, catalyst and Water is passed into the first pretreatment reaction kettle and stirred to obtain a sodium silicate mixed solution, and then the sodium silicate mixed solution and sulfuric acid are passed into a second pH adjustment reaction kettle and stirred to obtain the sodium silicate mixed solution. Adjust the pH of the sodium silicate mixture to 6.8-7.2 to obtain a neutral sodium silicate mixture; pass the catalyst and water into the second pretreatment reaction kettle and stir...

Embodiment approach

[0036] In one embodiment, in the operation of passing the drying gas into the drying machine, evaporating and drying the colloidal waste gas, and performing ventilation to maintain ventilation, the flow velocity of the drying gas is controlled to be 0.45m / s~0.55m / s. It should be noted that when evaporatively drying colloidal waste, it is necessary to carry out ventilation operation to maintain the ventilation state in the drying machine, so that the colloidal waste in the drying machine can be continuously evaporated and dried to remove the glue. When the circulation velocity of the drying gas is less than 0.45m / s, the circulation velocity of the drying gas in the dryer is relatively slow, and the water vapor obtained by evaporation cannot be evaporated in time. Taking out the drying machine will affect the efficiency of evaporative drying. When the circulation velocity of the drying gas is greater than 0.55m / s, the circulation velocity of the drying gas in the drying machine...

Embodiment 1

[0050] Provide 15L of chemical nickel waste liquid as waste, pass the waste and the mixture of sulfuric acid and sodium hydroxide into the first pH adjustment reactor, adjust the pH of the waste to 6.8, and obtain neutral waste.

[0051] Pass sodium silicate, catalyst and water into the first pretreatment reaction kettle, and stir to obtain the sodium silicate mixed solution, then pass the sodium silicate mixed solution and sulfuric acid into the second pH adjustment reaction kettle, and stirring, the pH of the sodium silicate mixed solution was adjusted to 6.8 to obtain a neutral sodium silicate mixed solution.

[0052] Pass the catalyst and water into the second pretreatment reaction kettle and stir to obtain the catalyst aqueous solution.

[0053] First pass the neutral waste and the neutral sodium silicate mixture into the waste solidification reaction tank, and stir for 3 minutes, then pass the catalyst aqueous solution into the waste solidification reaction tank, and St...

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Abstract

The invention provides an after-treatment process for exhaust gas formed after evaporation of colloidal waste. The process comprises the following steps: performing evaporation drying operation on thecolloidal waste, and collecting the exhaust gas formed after evaporation drying to obtain mixed wet gas containing water vapor; introducing the mixed wet gas containing water vapor into a bio-trickling device and conducting spraying operation, wherein after the mixed wet gas containing the water vapor is subjected to adsorption and impurity removal through a biological filler layer in the bio-trickling device, clean gas is obtained; and discharging the clean gas, wherein the flow velocity of the mixed wet gas containing the water vapor is controlled to be 0.5 m / s-1m / s, and the retention timeof the mixed wet gas containing the water vapor in the bio-trickling device is 5 s-8 s. Since the exhaust gas is collected, the direct emission of the exhaust gas into environment is avoided; and theimpurities are removed through the bio-trickling filtration device, the flow rate is controlled to be 0.5-1 m / s, and the retention time is 5-8 s, so the sufficient retention time of the water vapor-containing mixed wet gas is guaranteed, complete absorption decomposition of volatile organic substances and other harmful substances and deep impurity removal are ensured, and the obtaining of the clean gas is guaranteed.

Description

technical field [0001] The invention relates to the technical field of waste gas treatment, in particular to a post-treatment process for forming exhaust gas by evaporating colloidal waste. Background technique [0002] With the rapid development of industrialization, environmental pollution is becoming more and more serious. Among them, waste gas is one of the reasons for environmental pollution. Waste gas refers to the toxic and harmful gases discharged by human beings in the process of production and life, especially chemical plants and steel plants. , pharmaceutical factories, coking plants and oil refineries, etc., the exhaust gas emitted by the factory has a strong smell, which seriously pollutes the environment and affects human health. Serious harm, causing huge losses to the national economy, it is necessary to deal with the exhaust gas generated in industrial production to avoid polluting the environment. [0003] However, when domestic waste is processed, since d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/84B01D53/44B01D53/26C02F11/13F26B21/08F26B21/10
CPCB01D53/26B01D53/261B01D53/44B01D53/84B01D2257/708B01D2258/02C02F11/13F26B21/08F26B21/10Y02A50/20
Inventor 庄先胜焦贵平许达锋
Owner 广东睿泽环境科技有限公司