Waste plastic granulation waste gas treatment system and method

Abstract

The invention discloses a waste plastic granulation waste gas treatment method. The waste plastic granulation waste gas treatment method comprises the following steps: delivering waste gas to a spraytower and washing the waste gas in a spraying manner; delivering the waste gas washed in the sprayer manner to a demister and carrying out demisting treatment on the waste gas; delivering the demistedwaste gas to an oil fume purifier and carrying out oil removal treatment on the waste gas; delivering the waste gas subjected to oil removal treatment to a low-temperature plasma waste gas treatmentdevice and carrying out purification treatment on the waste gas; and feeding the purified waste gas into an activated carbon absorption tower and carrying out adsorption treatment. The treatment process is mature, the running cost is low, plastic granulation waste gas can be treated deeply, a multi-layered treatment effect is achieved, residual small-particle water-soluble substances in the wastegas can be removed, organic macromolecules in the waste gas can be split through the low-temperature plasma waste gas treatment device, the particulate matter content of the treated waste gas is low,and the waste gas is degraded into stable and pollution-free compounds to be discharged.

Description

technical field [0001] The invention relates to the technical field of waste gas treatment, in particular to a waste plastic granulation waste gas treatment system and method. Background technique [0002] The demand for plastics in modern life is increasing, and the recycling of waste plastics has become a trend. Recycling, washing and granulating waste plastics is a way to turn waste into treasure and reuse resources. However, in the process of regeneration and granulation, when the temperature When the temperature exceeds 200°C, the plasticizer and the low-boiling-point impurities inside will oxidize and decompose, producing a large amount of harmful gas containing dust particles, which contains more organic substances, such as benzene, toluene, styrene, chlorine-containing organic substances, etc. These Harmful gases are polluting and directly discharged into the air will not only cause physical harm to the staff, but also pollute the environment. For the treatment of s...

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Problems solved by technology

However, the efficiency of acid-base washing treatment is not high, activated carbon adsorption has the problem of frequent replacement of activated carbon or high regeneration costs, and the cost of catalytic combustion equipment is relatively high, so it is necessary to design and develop a new treatment system suitable for waste plastic granulation waste gas treatment

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