Coking plant VOCs treatment system

Abstract

The invention relates to a coking plant VOCs treatment system. The coking plant VOCs treatment system comprises a control system, a combustion treatment system and a negative pressure recovery system.The coking plant VOCs treatment system is capable of effectively treating VOCs and reducing the environment pollution caused by the VOCs to the greatest extent, and accords with the stipulation of Emission Standard of Pollutants for Coking Chemical Industry GB1617-2012.

Description

technical field [0001] The invention relates to the technical field of VOCs treatment of volatile organic compounds, in particular to a VOCs treatment system of a coking plant. Background technique [0002] VOCs (volatile organic compounds) refer to organic compounds with a saturated vapor pressure greater than 133.32 Pa at normal temperature and a boiling point below 50-260°C at normal pressure, or any organic solid or liquid that can volatilize at normal temperature and pressure. [0003] During the production process of gas purification, exhaust gas will be generated due to the flow of various media and the storage pressure of gas. During normal production, some production devices such as storage tanks will also discharge some exhaust gas. These exhaust gases and exhaust gases contain a large amount of VOCs. The sources of VOCs in the coking production process are as follows: 1. During the production process, the transfer between chemical product tanks, the gas in the tan...

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Problems solved by technology

However, the following technical problems were found in the practical application of this method: all tanks and tanks connected to negative pressure gas pipelines are equipped with breathing valves, and the range of breathing valves is generally -300 to +2000Pa, that is to say, when the inside of tanks and tanks When the pressure is greater than +2000Pa, the breathing valve will automatically open, and the waste gas in the tank and tank will be discharged into the atmosphere, causing environmental pollution. According to the "Emission Standard of Pollutants for Coking Chemical Industry" GB16171-2012, it is not allowed to discharge the waste gas into the atmosphere

Although the cost of the adsorption method is low, the amount of adsorption is small, and it is easy to have the problem of adsorption saturation and adsorption specificity; the process of the absorption method is relatively simple, and the investment in equipment is low, but the recovery efficiency of this process is low, and it is difficult to meet the requirements for environmental protection. Reach the allowable oil and gas emission standards; although the condensation method has a high degree of automation, convenient maintenance, and good safety, it consumes a lot of power and is not a real "energy saving and emission reduction"; although the membrane separation method has a simple process, high recovery rate, and no The characteristics of secondary pollution, but the domestic production rate of the membrane is low, the price is expensive, and the membrane life is short; although the biological filtration method has high treatment efficiency and simple process, the removal rate of VOCs is low; although the plasma method and photocatalytic oxidation method have high treatment efficiency, The operating cost is low, but the treatment efficiency for high-concentration VOCs is average; the combustion method is the most thorough treatment, and the main products of its combustion are water and carbon dioxide, which has a small degree of air pollution, but the safety of the current equipment is very low, which hinders the combustion Promotion and use of the law

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