A vertical soil thermal desorption device with internal and external heating and self-weight unloading

Abstract

The invention relates to a vertical soil heat desorption device with internal and external heating and self-weight cutting, which includes an inner channel and an outer channel sleeved outside the inner channel, and the gap between the inner channel and the outer channel forms mutually independent air channels and the flue; the inner passage is provided with a plurality of thermal desorption units, and the structure of each thermal desorption unit includes a movable baffle and a heating chamber, and the two ends of the heating chamber are respectively provided with flue gas inlets and outlets connected with the flue; Each heating chamber has at least one arc plate, and the arc plate and the movable baffle form a soil heating area. The movable baffle rotates around its top shaft under the action of soil pressure, so that the soil slides along the arc plate to the next thermal desorption In the soil heating area of ​​the unit; a serpentine heating chamber is formed between each heating chamber and the wall of the inner channel, and the heating chamber is connected with the air passage for discharging gaseous pollutants precipitated during desorption. The invention solves the technical problems of uneven heating and low heating rate.

Description

technical field [0001] The invention relates to the technical field of soil thermal desorption, in particular to a vertical soil thermal desorption device with internal and external heating and self-weight cutting. Background technique [0002] At present, thermal desorption remediation technology is one of the most effective methods in the remediation of organic contaminated soil. It uses the method of heating the contaminated soil to volatilize the organic pollutants in it. Wide, simple process and other advantages. [0003] The main equipment of the existing thermal desorption device usually adopts a horizontal rotary kiln structure. Although great achievements have been made in the soil desorption effect, there are still some problems: on the one hand, the conventional indirect heating method can only arrange the heat source Outside the rotary kiln, there are problems such as uneven heating and low heating rate; on the other hand, the movement of soil in the kiln requir...

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Problems solved by technology

[0004] Aiming at the shortcomings of the prior art, the present invention provides a vertical soil thermal desorption device with internal and external heating and self-weight cutting, which solves the technical problems of uneven heating and low heating rate

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