Process and system for eliminating industrial discharge gas white smoke pollution

Abstract

The invention relates to a process and a system for eliminating industrial discharge gas white smoke pollution. The system comprises a quenching tank, a washing tower, a water spraying-glass plate heat exchanger, a condensed water collecting tank, a chimney, a seawater taking pipe and a seawater return pipe; the quenching tank is connected to the washing tower through a pipe; a smoke outlet of thewashing tower is connected to an inlet of a hot side runner of the water spraying-glass plate heat exchanger through a pipe; an outlet of the hot side runner is connected to the chimney through a pipe; an inlet of a cold side runner is connected to a sea through the sweater taking pipe; and an outlet of the cold side runner is connected to the sea through the seawater return pipe. A cold source of the method is not directly contacted with smoke without polluting the cold source; the extracted seawater quantity is lower compared with the total quantity of surrounding seawater; the heat carriedby seawater heated after heat exchange with the smoke is naturally dissipated into the environment after returning to the sea; and such other cooling measures as a cooling tower are not needed to cool without causing environmental destruction.

Description

technical field [0001] The invention relates to the technical field of industrial exhaust gas treatment, in particular to a process method and system for eliminating white smoke pollution from industrial exhaust gas. Background technique [0002] In the production process of oil refining units in the petrochemical industry, it is often necessary to flush liquid hydrocarbons, gasoline, diesel and other oil products with new lye, resulting in waste lye containing sodium and sulfur, which is difficult to treat , It is easy to form secondary pollution, and it is often treated by incineration. The flue gas temperature after incineration is as high as 800-1000°C, and contains corrosive substances. Quenching, water spraying and other methods are often used to cool down. The resulting flue gas usually contains a large amount of water vapor, and the H in the flue gas components 2 The O content can be as high as 60%. In addition, there will also be a water spray link in the treatme...

AI Technical Summary

Problems solved by technology

The difficulty of the condensation method for the treatment of such high-moisture flue gas is that: on the one hand, due to the high water content of the flue gas, which can be as high as more than 60%, a large amount of latent heat of vaporization will be released during the cooling and condensation process. It is difficult to completely absorb the cold sources such as combustion-supporting air, boiler water supply, deoxygenated water, and ambient air. Therefore, whether you can find a suitable cold source to absorb these heat is the decision whether you can use condensation to eliminate white smoke and save water. The key is the difficulty of the technology

On the other hand, these high-temperature flue gases often contain acidic corrosive substances, which can cause serious corrosion to metals. Choosing a suitable condensation method and anti-corrosion measures for condensing equipment is another difficulty in this technology.

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