Vertical soil thermal desorption device with internal and external heating and self-weight blanking functions

Abstract

The invention relates to a vertical soil thermal desorption device with internal and external heating and self-weight discharging functions. The device comprises an inner channel and an outer channel arranged outside the inner channel in a sleeving mode, and a gas channel and a flue which are independent of each other are formed in a gap between the inner channel and the outer channel; a plurality of thermal desorption units are arranged in the inner channel, each thermal desorption unit structurally comprises a movable baffle and a heating cavity, and a flue gas inlet and a flue gas outlet which are communicated with the flue are formed in the two ends of each heating cavity respectively; each heating cavity is provided with at least one arc plate, the arc plate and the movable baffle form a soil heating area, and the movable baffle rotates around a rotating shaft at the top of the movable baffle under the action of soil pressure, so that soil slides into the soil heating area of the next thermal desorption unit along the arc plate; and a snakelike heating chamber is formed between each heating cavity and the wall surface of the inner channel, and the heating chamber is communicated with the gas channel and is used for discharging gaseous pollutants separated out during desorption. The technical problems of uneven heating and low heating rate are solved.

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 technology of organic contaminated soil. The method of heating the contaminated soil is used to volatilize the organic pollutants in it, which has high pollutant removal efficiency, short remediation period and wide application range. Wide, simple process and other advantages. [0003] The main equipment of existing thermal desorption devices usually adopts a horizontal rotary kiln structure. Although great results have been achieved in terms of 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 pr...

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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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