An integrated soil thermal desorption device with internal and external heating

Abstract

The invention relates to an internal and external heating integrated soil heat desorption device, which comprises an inner cylinder for transporting soil in the axial direction and an outer casing arranged outside the inner cylinder, a cavity is formed between the outer wall of the inner cylinder and the inner wall of the outer casing, and the inside of the cavity is There are multiple partitions in the axial direction, and the partitions divide the cavity in the axial direction into primary distribution boxes, secondary distribution boxes, tertiary distribution boxes... the final distribution box; the primary distribution box communicates with the combustion flue gas , between two adjacent distribution boxes, a number of communication pipes are used to realize the communication of smoke gas. The smoke inlet and outlet of each communication pipe are respectively located on the inner cylinder wall corresponding to the two adjacent distribution boxes, and the communication pipe is located inside the inner cylinder. , so that the flue gas enters the next-level distribution box from the upper-level distribution box through the Unicom pipe in a serpentine path, and finally reaches the final-level distribution box. The invention adopts the method of simultaneously heating the inside and outside of the soil, which greatly increases the heating rate of the soil, and can significantly increase the unit processing capacity of the thermal desorption device.

Description

technical field [0001] The invention relates to the technical field of contaminated soil remediation, in particular to a soil thermal desorption device integrating internal and external heating. Background technique [0002] At present, organic contaminated soil remediation technologies are mainly divided into three categories: physical remediation, chemical remediation and bioremediation, as well as combined remediation technologies based on the above technologies. Among them, thermal desorption remediation technology is one of the most effective methods of ex-situ desorption. It uses the method of heating the contaminated soil to volatilize the organic pollutants in it. It has the advantages of high pollutant removal efficiency, short remediation period, wide application range and technological The principle is simple and so on. [0003] The existing thermal desorption device usually adopts an external heat rotary kiln structure, and the heating device is arranged outside...

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Problems solved by technology

[0004] Aiming at the defects of the prior art, the present invention provides an integrated internal and external heating soil thermal desorption device, thereby solving the technical problem of low thermal desorption efficiency

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