Pyrolysis gas recycling device as well as method and application thereof

Abstract

The invention relates to the field of recycling pyrolysis solid waste and dangerous waste and discloses a pyrolysis gas recycling device. The device comprises a mixed cold heat exchanger, an indirectheat exchanger, a gas-liquid separator, a solid-liquid separator, an evaporator, a condenser and a buffer tank, wherein the mixed cold heat exchanger is arranged in the axial direction from bottom totop; a first material inlet, a nozzle, a middle demister, a liquid collecting plate, a heat exchange tube, a distributor, a top demister and a first material outlet are sequentially arranged in the mixed cold heat exchanger; a vertical falling film tube for conveying materials collected by the liquid collecting plate to the bottom of the mixed cold heat exchanger in a concentrated mode is furtherarranged in the mixed cold heat exchanger; the indirect heat exchanger, the condenser and the heat exchange tube are sequentially connected to make coolant sequentially flow through the indirect heatexchanger, the condenser and the heat exchange tube. The device can comprehensively and effectively solve the problems of solid particle separation, the wall hanging or pipe plugging phenomenon of theheat exchange tube and poor oil gas side heat transfer performance and achieves high-efficiency condensation and classified condensation recovery on 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, in particular to a purification and recovery device for pyrolysis gas produced by solid waste and hazardous waste, and a method for recovering pyrolysis gas by using the device and the method in Applications in solid waste recycling. 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 is light The cracked gas is used as fuel f...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the above-mentioned problems existing in the prior art, and to provide a device for recovering cracked gas and its recovery method and application. The device of the present invention can comprehensively and effectively solve the problem of solid particle separation and heat exchange tube hanging on the wall. Or plugging phenomenon, poor heat transfer performance on the oil and gas side, to achieve high-efficiency condensation of cracked gas and classified condensation recovery

Images