Device and method applied to thermal desorption treatment of mercury-contaminated soil

A treatment device, mercury pollution technology, applied in the field of contaminated soil remediation, can solve the problems of large amount of exhaust gas, not suitable for mobile equipment, etc., achieve uniform heating, avoid blockage, and improve the effect

Active Publication Date: 2015-01-21
中节能大地环境修复有限公司
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, the above-mentioned types of equipment have problems such as being unsuitable as mobile equipment and generating a large amount of exhaust gas.
At the same time, the desorption tail gas and wastewater treatment process

Method used

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  • Device and method applied to thermal desorption treatment of mercury-contaminated soil

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Embodiment Construction

[0030] A thermal desorption treatment device for mercury-contaminated soil, comprising a pretreatment unit, a feed unit, a fuel supply unit, a thermal desorption unit, a high-temperature dust removal unit, a condensed water treatment unit, a discharge unit, a tail gas cooling unit, and a tail gas treatment unit; The pretreatment unit is connected with the feed unit, the feed unit, the fuel supply unit, the discharge unit and the high temperature dedusting unit are all connected with the thermal desorption unit, the high temperature dedusting unit is connected with the tail gas cooling unit, the tail gas cooling system is connected with the tail gas treatment unit It is connected with the condensed water treatment unit, and the condensed water treatment unit is connected with the discharge unit;

[0031] The feeding unit may be composed of a belt scale and a belt conveyor. The soil to be treated is evenly dropped onto the belt conveyor through the belt scale, and then transporte...

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Abstract

The invention discloses a device and a method applied to thermal desorption treatment of mercury-contaminated soil. The device comprises a pretreatment unit, a charging unit, a fuel supply unit, a thermal desorption unit, a high-temperature dust removal unit, a condensate water treatment unit, a discharging unit, a tail gas cooling unit and a tail gas treatment unit, wherein the pretreatment unit is connected with the charging unit; the charging unit, the fuel supply unit, the discharging unit and the high-temperature dust removal unit are connected with the thermal desorption unit; the high-temperature dust removal unit is connected with the tail gas cooling unit; the tail gas cooling unit is connected with the tail gas treatment unit and the condensate water treatment unit; the condensate water treatment unit is connected with the discharging unit; the thermal desorption unit adopts a thermal screw conveyor. According to the device, the contaminants are indirectly heated, volatilized and separated out of the contaminated soil, so that the mercury in the mercury-contaminated soil can be effectively removed; meanwhile, the mercury in the tail gas can be recycled and desorbed by a hydrocyclone separation method; and the up-to-standard emission of the tail gas and the wastewater can be achieved.

Description

technical field [0001] The invention relates to a movable system for treating and recovering mercury by adopting a thermal desorption process for mercury-contaminated soil, belonging to the field of contaminated soil remediation. Background technique [0002] my country is the largest producer and consumer of mercury. Mercury emitted by key pollution sources such as coal burning, mercury mining and smelting, non-ferrous metal smelting enterprises, and cement plants has polluted the surrounding air, water, and soil, and the pollution is serious in some areas. According to a preliminary estimate from the data, the soil area contaminated by mercury in my country is 3.2×10 4 ha, the amount of mercury that pollutes the environment is 1.9×10 per year 8 kg. The thermal desorption process is one of the best treatment technologies for high-concentration mercury-contaminated soil. It uses direct or indirect heating to heat the contaminated soil to a high enough temperature and kee...

Claims

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Application Information

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IPC IPC(8): B09C1/06
Inventor 胡清张鹤清万德山熊杰唐一高菁阳林斯杰朱文会
Owner 中节能大地环境修复有限公司
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