Cooling method and apparatus for gas produced in pyrolysis and desorption of soil

Abstract

The invention relates to a cooling method and apparatus for gas produced in pyrolysis and desorption of soil. According to the cooling method and apparatus for gas produced in pyrolysis and desorptionof soil, after spraying liquid is discharged out of a spraying tower, the spraying liquid is introduced into a main water tank for water treatment, the treated spraying liquid is introduced into aircoolers from the main water tank and then cooled, and the cooled spraying liquid is introduced into the spraying tower for cyclic usage; the number of the air coolers is at least two, and at least twoair coolers work at the same time; the air coolers are provided with cleaning units; the main water tank is provided with an auxiliary water tank, the auxiliary water tank is communicated with the main water tank, and spraying liquid in the main water tank is partially introduced into the auxiliary water tank and temporarily stored in the auxiliary water tank; and when the air coolers are in a cleaning state, the spraying liquid in the auxiliary water tank is conveyed to the spraying tower so as to keep the stability of the flow and the temperature of the spraying liquid in the spraying tower. The method and apparatus of the invention realizes self-sufficiency of cooling liquid in process operation on the premise of ensuring the stability of a cooling process for gas produced in pyrolysisand desorption of soil.

Description

technical field [0001] The invention belongs to the technical field of thermal desorption and desorption, in particular to a method and equipment for cooling soil thermal desorption and desorption gas. Background technique [0002] Thermal desorption technology is an emerging contaminated soil treatment technology, which has been widely used in recent years. The thermal desorption gas of soil not only contains a large amount of dust, but also contains a large amount of condensable gas, including water, oil, organic pollutants, etc. in gaseous state. When these substances are to be recycled, spray towers are often used to remove them These components are recycled after cooling, but the amount of cooling liquid is relatively large when spraying. Contents of the invention [0003] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a method and equipment for cooling soil thermal desorption and desorption gas, which can realize th...

AI Technical Summary

Problems solved by technology

The thermal desorption gas of soil not only contains a large amount of dust, but also contains a large amount of condensable gas, including water, oil, organic pollutants, etc. in gaseous state. When these substances are to be recycled, spray towers are often used to remove them These components are recycled after cooling, but the amount of cooling liquid used in spraying is relatively large

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