System for drying persistent organic pollutants (POPs) polluted soil through flue gas waste heat

A technology of organic pollutants and waste heat of flue gas, applied in the restoration of polluted soil, separation of dispersed particles, chemical instruments and methods, etc., can solve pollution and other problems, achieve reduced energy consumption, low energy consumption, and easy on-site construction and installation Effect

Active Publication Date: 2012-08-01
ZHEJIANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The technical problem to be solved in the present invention is to overcome the deficiencies in the prior art, aiming at the properties of pers

Method used

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  • System for drying persistent organic pollutants (POPs) polluted soil through flue gas waste heat
  • System for drying persistent organic pollutants (POPs) polluted soil through flue gas waste heat
  • System for drying persistent organic pollutants (POPs) polluted soil through flue gas waste heat

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Embodiment Construction

[0032] Referring to the accompanying drawings, the present invention will be described in detail below in conjunction with embodiments.

[0033] figure 1 The process flow diagram of the system for drying POP-contaminated soil with waste heat of flue gas is given, which is composed of soil drying components and tail gas treatment components.

[0034] The soil drying components include a feeder 1, a self-cleaning paddle dryer, a heat transfer oil pump 14, and a heat exchanger 14, and the tail gas treatment components include a dust collector 16, a spray tower 17, an induced draft fan 18, and an exhaust tube 19; The feeder is connected to the self-cleaning paddle dryer, and the cylindrical shell of the self-cleaning paddle dryer is equipped with a hollow thermal shaft 11, and several groups of paddles 3 are arranged on the hollow thermal shaft 11, and the paddles 3 are double-bladed Arrangement distribution, self-cleaning scraper 5 is set between every two groups of paddles 3 to...

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Abstract

The invention relates to a polluted soil treatment technology and aims to provide a system for drying persistent organic pollutants (POPs) polluted soil through flue gas waste heat. The system comprises a self-cleaning blade dryer, a heat-conducting oil pump and a heat exchanger, wherein an extraction opening is formed on the upper side of a shell of the self-cleaning blade dryer and is connectedwith a dust remover; a lower outlet of the dust remover is connected with a feeder; an upper outlet of the dust remover is connected with a spray tower, the spray tower is connected with a draught fan, and the draught fan is connected with an exhaust funnel; and the heat exchanger is arranged in a tail flue gas channel of another independent thermal desorption device, and tail gas exhausted by the thermal desorption device serves as a heat exchange medium. By the system, soil drying and tail gas treatment are integrated, the tail flue gas of the independent thermal desorption device serves asa heat source of heat-conducting oil of a drying machine, on-site construction and installation are easily performed, a low-grade heat source is fully utilized, the energy consumption in the soil drying process is reduced, and the energy is saved; and moreover, the whole system has a compact structure and high drying speed, occupies a small space and can be continuously operated.

Description

technical field [0001] The invention relates to a persistent organic pollutant polluted soil treatment and disposal equipment. More specifically, the present invention relates to a system for drying persistent organic pollutant-contaminated soil with waste heat from flue gas. Background technique [0002] With the development of the economy and the improvement of public awareness of environmental protection, especially after the signing of the Stockholm Convention, the pollution caused by persistent organic pollutants (Persistent Organic Pollutants, POPs) has been highly valued. Due to historical reasons, a large amount of land in my country is currently polluted by persistent organic pollutants, such as polychlorinated biphenyls and various pesticides. Taking PCBs used in the power industry as an example, a large amount of wastes containing PCBs are sealed up in various storage points due to the limitation of treatment technology. Many storage points have reached or excee...

Claims

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Application Information

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IPC IPC(8): B09C1/06B01D50/00
Inventor 李晓东严建华陆胜勇陈彤祁志福王飞
Owner ZHEJIANG UNIV
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