Treating device and treating process for waste gas produced in pyrolysis of waste rubber and plastics

Abstract

The invention discloses a treating device and a treating process for waste gas produced in pyrolysis of waste rubber and plastics, belonging to the field of environmental protection. The device comprises a buffer tank, a liquid separating tank, a purification tank, a desulfurization tank, a safety tank, a vacuum pump, a corrosion-resistant pump, second to eighth stop valves, a ball valve, a gate valve, first to fifth blowoff valves, a steam valve, a gas respirator and an explosion-proof means. According to embodiments of the invention, by using the device composed of the buffer tank, the liquid separating tank, the purification tank, the desulfurization tank, the safety tank, the vacuum pump, the corrosion-resistant pumps and various control valves, solid dust, floating oil fumes and harmful gases like sulfur dioxide and hydrogen sulfide in waste gas can be effectively treated under the premise of safety and environmental protection so as to obtain an effective energy of combustible gas for a pyrolysis apparatus, and waste gas is thus completely recycled; not only the problem of environmental pollution caused by disordered emission of waste gas is overcome, but also a great amount of renewable energy is recycled and consumption of plenty of fuel oil or coal resources needed in pyrolysis is reduced.

Description

Technical field [0001] The invention relates to environmental protection equipment, in particular to a waste gas treatment device and treatment process in the cracking of waste rubber and plastics. Background technique [0002] At present, about 5-8% of the non-condensable gas generated in the thermal cracking of waste tires, rubber or waste plastics is exhaust gas, which includes solid dust, mucus tar, sulfur dioxide and hydrogen sulfide gas. [0003] Due to the complexity of the conventional equipment for treating the above-mentioned exhaust gas, the investment in the exhaust gas treatment device and the amount of construction work occupy 20-30% of the investment cost of the entire thermal cracking equipment. In addition, the exhaust gas treatment device needs to consume a lot of water resources during operation. Therefore, most waste tire thermal cracking equipment manufacturers and treatment plants do not support exhaust gas treatment, and directly discharge this part of the e...

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Problems solved by technology

[0003] Due to the complexity of conventional devices for treating the above-mentioned waste gas, the investment and construction work of the waste gas treatment device takes up 20-30% of the investment cost of the whole set of thermal cracking equipment

In addition, the exhaust gas treatment device needs to consume a lot of water resources during operation

Therefore, most waste tire pyrolysis equipment manufacturers and treatment plants do not provide waste gas treatment, but directly discharge this part of the waste gas or directly burn it in the form of a torch, which causes serious environmental pollution and wastes a lot of recyclable waste. energy used

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