Device and method for purifying in treatment of volatile gas of petrochemical coke cooling water tank

Abstract

The invention discloses a device and a method for purifying in treatment of volatile gas of a petrochemical coke cooling water tank. The device comprises a buffering tank, a condenser, a first ejector, a first cyclone absorbing tower, a spraying head, a second cyclone absorbing tower, a second ejector, an exhaust barrel, a second circulating pump, a second circulating tank, a first circulating pump, a first circulating tank, an air guide pipe and an absorbent circulating pipe. According to the device, waste gas is collected and exported from the petrochemical coke cooling water tank, the buffering tank is used for smoothening the flow and separating out more of easily-condensed oil gas and water vapor, and then the waste gas enters the condenser (the waste gas from the petrochemical coke cooling water tank is cooled to be less than 50 DEG C) and finally enters the absorbing towers; two-stage cyclone plate towers are connected in series to perform circular absorbing; two-stage parallel ejectors are mounted at the front and back of the absorbing towers to be used as gas exporting power; meanwhile, absorbents and waste gas are fully mixed and absorbed through the ejectors; the mixed liquid enters an absorbent circulating tank to be subjected to gas-liquid separation and finally the separated liquid enters the exhaust barrel to be exhausted. The device has the advantages of being efficient, energy-saving, safe, reliable, and long in service life.

Description

technical field [0001] The invention relates to a purification device and a purification method for treating volatile gas in petrochemical cold coke water tanks. Background technique [0002] In the process of oil refining and production, organic compounds containing sulfur, nitrogen, oxygen and other complex structures contained in crude oil are further transformed and decomposed under a series of process conditions such as heating, pressurization, catalytic oxidation or cracking to produce a large number of special Smelly hydrogen sulfide, organic sulfides, organic acids and other malodorous substances, which escape into the atmosphere, will cause odor pollution to varying degrees and scopes. In recent years, odor pollution has become increasingly prominent, and has become the second largest public hazard after noise. With the continuous improvement of people's quality of life, the requirements for environmental quality are also getting higher and higher. People pay more a...

AI Technical Summary

Problems solved by technology

[0003] Especially the foul-smelling waste gas from cold coke and coke cutting water tanks of coking units not only has the characteristics of large waste gas volume, unstable gas flow rate, and complex toxic and harmful gases, among which volatile pollutant gases are mainly hydrogen sulfide, organic sulfides, ammonia nitrogen compounds, hydrocarbons Etc., the processing is difficult, and the purification device currently used can easily lead to secondary pollution, and has the disadvantages of poor purification effect, short life and low reliability.

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