Waste gas treatment method for pretreatment of polluted soil
A technology for waste gas treatment and polluted soil, applied in the restoration of polluted soil, grain treatment and other directions, can solve the problems of increasing the cost and difficulty of waste gas treatment, affecting the decomposition of waste gas, and incapable of fully decomposing waste gas, and achieving cost economical rationality. better, the decomposition efficiency is improved, and the decomposition effect is ensured
Active Publication Date: 2021-01-29
徐州中科振丰环境科技研究院有限公司
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Problems solved by technology
However, in the process of decomposing organic waste gas by high-temperature calcination in the existing high-temperature combustion technology, many of the polluted soils are not sufficiently crushed. Such a large piece of polluted soil will easily lead to low efficiency of subsequent high-temperature calcination to decompose waste gas. , It is also easy to cause the waste gas of polluted soil to be unable to be fully decomposed, and the temperature process standard in the decomposition process is not ideal, the cost and economy are unreasonable, which not only affects the decomposition of waste gas, but also increases the cost and cost of subsequent waste gas treatment. difficulty
Method used
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Embodiment
[0030]referenceFigure 1-2In this embodiment, a waste gas treatment method for pretreatment of contaminated soil is proposed, which includes the following steps:
[0031]S1: Use a weighbridge to measure the contaminated soil and transport it to the crushing bin of the contaminated soil through a conveyor;
[0032]S2: The contaminated soil in the crushing silo enters the crusher through the pipeline for crushing treatment, so that the particle size of the contaminated soil is 2.5<4.5mm, and the crushed contaminated soil particles are obtained;
[0033]S3: The crushed contaminated soil particles are transported to the tumble dryer through the conveyor for drying treatment, and the tumble dryer also uses a hot air stove for auxiliary heating and drying to accelerate the drying speed;
[0034]S4: The drum dryer will decompose part of the waste gas in the polluted soil during the drying process of the crushed polluted soil particles, and the waste gas will enter the kiln head waste gas treatment syst...
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The invention discloses a waste gas treatment method for pretreatment of polluted soil. The waste gas treatment method comprises the following steps that polluted soil is metered through a wagon balance and conveyed to a crushing bin of the polluted soil through a material conveying machine; and the polluted soil in the crushing bin enters a crusher through a pipeline and is crushed, and the particle size of the polluted soil is enable to in a range of 2.5 mm to 4.5 mm, so crushed polluted soil particles are obtained. According to the invention, the polluted soil can be fully crushed, the existence of large soil blocks is avoided, and the particle size of in-furnace soil is relatively small and uniform, so uniform heating in the pyrolysis process is realized, the treatment quality of pyrolysis is ensured, organic waste gas in the polluted soil can be fully and quickly decomposed at high temperature, and the efficiency of decomposing waste gas by high-temperature calcination is greatlyimproved; and in addition, the optimal process standard of pyrolysis waste gas is achieved in the process of decomposition treatment, sufficient decomposition of organic waste gas is ensured, decomposition efficiency is improved, and the economic rationality of the cost is optimal.
Description
Technical field[0001]The invention relates to the technical field of contaminated soil pretreatment, in particular to a waste gas treatment method for contaminated soil pretreatment.Background technique[0002]Contaminated soil refers to soil that has been affected by corrosive media and changed its original physical and mechanical properties and chemical properties. Generally, it can be divided into organic matter polluted soil and heavy metal polluted soil. Narrow contaminated soil usually refers to soil contaminated by organic matter, such as soil contaminated by toxic pesticides, grease, etc. (non-heavy metals and radioactive elements). Soil pollution can cause the content of pollutants in crops to exceed the standard, and accumulate in humans and animals through the food chain, endanger human and animal health, and cause human cancer and other diseases. In addition, after the soil is contaminated, the polluted topsoil with a high concentration of pollutants easily enters the atmo...
Claims
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IPC IPC(8): B09C1/06B02C18/10B02C18/16B02C18/18B02C18/02B02C18/04B02C4/26B02C4/42B02C21/00B02C23/14B02C23/16
CPCB09C1/065B02C18/10B02C18/16B02C18/18B02C18/02B02C18/04B02C4/26B02C4/42B02C21/00B02C23/14B02C23/16B02C2023/165
Inventor 崔皓陈露李鑫
Owner 徐州中科振丰环境科技研究院有限公司