Repairing system and repairing method of high-boiling point organic matter contaminated soil

Abstract

The invention relates to a repairing system and a repairing method of high-boiling point organic matter contaminated soil. The repairing system comprises a feeding mechanism, a dehydration mechanism and a thermal desorption mechanism which sequentially communicate with one another, wherein the dehydration mechanism comprises an indirect dehydration kiln; a heating jacket is arranged outside the indirect dehydration kiln in a sleeving manner; the thermal desorption mechanism comprises a direct thermal desorption kiln; an exhaust port of the direct thermal desorption kiln sequentially communicates with a combustion decomposer and a heat exchanger; a flue gas outlet of the combustion decomposer communicates with a heat supply medium inlet of the heat exchanger; an outlet of the heating jacketcommunicates with a heat absorption medium inlet of the heat exchanger; a heat absorption medium outlet of the heat exchanger communicates with an inlet of the heating jacket; and a circulating pumpis arranged between the outlet of the heating jacket and the heat absorption medium inlet of the heat exchanger and / or between the heat absorption medium outlet of the heat exchanger and the inlet ofthe heating jacket. The repairing system and the repairing method have the characteristics that operation cost is low, treatment capacity is large, operation is stable and secondary pollution is avoided while a soil organic matter desorption effect is achieved.

Description

technical field [0001] The invention relates to a repairing system and a repairing method for soil polluted by high boiling point organic matter. Background technique [0002] Facing the serious situation of soil pollution in our country, in 2004 the Ministry of Environmental Protection issued the "Notice on Effectively Doing a Good Job in the Prevention and Control of Environmental Pollution in the Process of Enterprise Relocation". In 2008, the Ministry of Environmental Protection issued the "Opinions on Strengthening the Prevention and Control of Soil Pollution". Since the State Council approved the implementation of the "Implementation Plan for the Treatment of Heavy Metal Pollution in the Xiangjiang River Basin" in 2011, the treatment of heavy metal-contaminated soil has achieved remarkable results. In 2014, the Ministry of Environmental Protection issued the "Notice on Strengthening Pollution Prevention and Control in the Process of Shutdown, Relocation, and Redevelop...

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Problems solved by technology

Therefore, the heat recovery rate of the system is limited, and the use of wet spraying to remove organic matter will increase the cost of wastewater treatment and activated carbon

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