Contaminated soil thermal decomposition tail gas treatment method
A technology for exhaust gas treatment and polluted soil, applied in the field of polluted soil remediation, can solve the problems of high processing cost and high energy consumption, and achieve the effects of reducing the processing cost, being conducive to wide application, safe and effective processing
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Embodiment 1
[0024] A method for treating polluted soil thermal desorption tail gas, which is to treat the tail gas discharged from the gas phase outlet of the thermal desorber, and remove the particulate matter and pollutants in the tail gas produced by the thermal desorption of the polluted soil, so that the tail gas can be purified to meet the discharge standard. The method Including: dust removal treatment, catalytic combustion, cooling treatment and absorption treatment, among which:
[0025] The dust removal treatment: the tail gas discharged from the gas phase outlet of the thermal analyzer passes through the filter bag to remove particles; in order to effectively remove particles, after the contaminated soil is thermally desorbed, the organic pollutants in the soil are decomposed, and the dust generated during the thermal desorption process To form flue gas with particulate matter, firstly, dust removal treatment is carried out. The dust removal treatment of flue gas is carried out ...
Embodiment 2
[0030] This embodiment is a preferred solution of Embodiment 1, so the content of Embodiment 1 should also be regarded as the content not shown in this embodiment.
[0031] In this embodiment, in the catalytic combustion process, according to the type and content of organic pollutants in the exhaust gas, the catalytic combustion temperature can be controlled at 200°C, 300°C, 400°C, 500°C, and 600°C respectively. , the running time can be appropriately extended or shortened according to the temperature, but it must be guaranteed to be more than 2 seconds.
[0032] In an embodiment, in the composite oxide of the carrier and manganese oxide and one or more elements of Ce, Zr, Ti, Co, Fe, Cu: the carrier is a mesoporous molecular sieve, and the manganese oxide and The composite oxides of one or more elements in Ce, Zr, Ti, Co, Fe, Cu are: manganese oxide and Ce, the content is 65% and 35% of the total; manganese oxide and Ti, the content They are 76% and 24% of the total respecti...
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