Device for condensing and recovering pyrolysis gas, method and application thereof

Abstract

The invention relates to the field of recycling solid waste and hazardous waste by a pyrolysis method, and discloses a device for condensing and recovering pyrolysis gas. The device comprises a pre-separator, a falling film mixed-cold heat exchanger, a first dividing wall-type heat exchanger, a second dividing wall-type heat exchanger, a reheater and a gas cabinet connected in sequence; the bottomof the falling film mixed-cold heat exchanger is connected with a first separator, a first oil tank and a first reboiler; the bottom of the first dividing wall-type heat exchanger is connected with asecond separator and a second oil tank in turn, and the second oil tank is further connected to the first reboiler, the falling film mixed-cold heat exchanger and a second tank respectively; the bottom of the second dividing wall-type heat exchanger is sequentially connected with a third separator, a third oil tank and a third reboiler; the reheater is further connected with the third oil tank; and the device further comprises a third heat exchanger. The device can comprehensively solve the problems of solid particle separation, heat exchange tube wall hanging or tube blocking phenomena, andpoor heat transfer performance on the oil and gas side, and realizes efficient condensation and classification condensation recovery of the pyrolysis gas.

Description

technical field [0001] The present invention relates to the field of resource recovery and utilization of pyrolysis solid waste and hazardous waste, and specifically relates to a condensation recovery device for pyrolysis gas generated after solid waste and hazardous waste are pyrolyzed and used A method for recovering pyrolysis gas by means of condensation and the application of the method in solid waste recovery. Background technique [0002] Solid waste is rich in mineral resources. Through the recycling of solid waste, it can not only realize the reduction, harmlessness and environmental protection of solid waste, but also obtain pyrolysis products with certain value. produce significant economic benefits. For example, for all kinds of waste or hazardous waste such as waste rubber products, waste plastic products, waste tires, and oil sludge, pyrolysis technology can be used to produce pyrolysis gas, part of which is recovered by condensation, and the other part Light ...

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the above-mentioned problems in the recovery of pyrolysis gas existing in the prior art, and to provide a device for condensing and recovering pyrolysis gas and its recovery method and application. The device and method of the present invention can comprehensively Effectively solve the problems of solid particle separation, wall-hanging or plugging of heat exchange tubes, and poor heat transfer performance on the oil-gas side, and realize efficient condensation of pyrolysis gas and classified condensation recovery

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