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Two-stage immersion combustion evaporation process for treating percolate from filling field

A technology of immersion combustion evaporation and leachate, which is applied in heating water/sewage treatment and other directions, can solve the problems of difficult exhaust gas and low energy utilization rate, and achieve the effects of reducing pollution, saving energy and improving heat transfer efficiency.

Inactive Publication Date: 2004-03-31
TSINGHUA UNIV
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Problems solved by technology

At present, the evaporation processes developed and applied at home and abroad all have problems such as low energy utilization rate and difficult tail gas treatment.

Method used

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  • Two-stage immersion combustion evaporation process for treating percolate from filling field
  • Two-stage immersion combustion evaporation process for treating percolate from filling field

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Embodiment Construction

[0008] The invention is an economical, efficient and energy-saving two-stage landfill leachate immersion combustion evaporation process, the process flow is as follows figure 1 The specific steps shown are: firstly, the leachate raw liquid or the pre-treated leachate concentrate, after preliminary filtration, enters the evaporation unit 2 of the first stage from the heat exchanger 4, and uses landfill gas or other commercial fuels as the Energy, the high-temperature gas (750-850°C) produced by the combustion of the gas burner 1 enters the leachate in the first-stage evaporation unit 2 and the second-stage evaporation unit 3 respectively, and the released heat evaporates and concentrates the leachate In the first stage, the steam generated by the evaporation unit 2 flows back into the gas burner 1, and is incinerated at 750-850°C to evaporate the volatile organic compounds in the leachate, and return to the gas burner to destroy the organic components through incineration, and o...

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Abstract

A method of immersing-burning-evaporating percolating water of second-phrase landfills, which could dispose percolating water of landfills, leach liquor of refuse burning factories and high concentration organic waste water. Burning landfilled gases or other goods as sources of energy, the resultant high-temperature gases are entered the inner of liquid of a two-stage evaporating unit, evaporating and concentrating the percolating water,the condensated liquor could be discharged for coming up to standards, the concentrated water should be solidified, landfilled, burned or recharged. The process could separate volatile organic compounds and water from percolating water, volatile organic components are mostly oxidizing into CO2 and H2O, which reduces the pollution on environment. Steam produced in the second-step evaporating unit could preheat the original percolating water, which improved heat conductive efficiency, and saving energy.

Description

technical field [0001] The invention belongs to the technical field of garbage treatment for environmental protection, and in particular relates to a two-stage landfill leachate immersion combustion evaporation process for the treatment of landfill leachate, garbage incineration plant leachate and high-concentration organic wastewater. Background technique [0002] Landfill disposal is an important part of solid waste management. For a complete solid waste management system, landfill is an indispensable key element. At present, the pollution control of landfills is still a weak link, and the treatment of landfill leachate has always been a difficult problem faced by environmental protection workers. The output of leachate is large, the concentration of pollutants is high, and the range of water quality varies widely. Not only does it change regularly with the change of four seasons every year, the alternation of dry season and rainy season, but also shows regularity with the...

Claims

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Application Information

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IPC IPC(8): C02F1/04
Inventor 聂永丰岳东北许玉东
Owner TSINGHUA UNIV
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