Pyrolyzing furnace non-condensable gas collecting, pressure-stabilizing, utilizing and treating method

Abstract

The invention discloses a pyrolyzing furnace non-condensable gas collecting, pressure-stabilizing, utilizing and treating method, which comprises: allowing non-condensable gas generated by a pyrolysis furnace to enter an alkaline washing tower through a gas inlet, carrying out a neutralization reaction to remove acidic materials in the non-condensable gas, and allowing the non-condensable gas to enter a first buffer tank for buffer storage; adopting a Roots blower to pressurize and convey the non-condensable gas in the first buffer tank into a second buffer tank for buffering; and conveying the non-condensable gas cached in the second buffer tank to a hot blast stove in the pyrolyzing furnace through a pressure reducing valve for combustion and heat supply. The non-condensable gas does not corrode equipment during combustion after being deacidified by the alkaline washing tower, and meanwhile, the problems of difficulty in tail gas treatment and the like are solved. A collecting, pressure-stabilizing, utilizing and treating system for the non-condensable gas is high in automation degree, high in safety design degree and easy to operate. The pressure in the pyrolyzing furnace can be effectively controlled to be stable, and the gas of the hot blast stove is stably and uniformly conveyed, so that the whole pyrolyzing system continuously and stably runs.

Description

technical field [0001] The invention relates to the technical field of pyrolysis and gasification, in particular to a treatment method for collecting, stabilizing, and utilizing non-condensable gas in a pyrolysis furnace. Background technique [0002] The organic solid waste is gasified through the pyrolysis furnace to complete the pyrolysis process, producing pyrolysis oil, pyrolysis water and non-condensable gas. Pyrolysis oil and non-condensable gas are used as renewable energy, so as to achieve the purpose of recycling organic solid waste resources by using pyrolysis process. Among them, the main components of non-condensable gas are: methane, hydrogen, carbon monoxide, ethane, acetylene, butane and other combustible gases below carbon five, with a calorific value of more than 10,000 calories per standard square meter, and a calorific value higher than natural gas 1500-2000 card / Nm 3 , is a very good regenerative gas energy source. The non-condensable gas produced by p...

AI Technical Summary

Problems solved by technology

The amount of non-condensable gas generated during continuous pyrolysis is irregular, and the pressure inside the pyrolysis furnace is controlled at a micro-negative pressure of ±500Pa, which makes it difficult to return the non-condensable gas to the furnace for utilization. Enterprises need to invent a set of non-condensable gas collection, Pressure stabilization utilization system and method to maintain stable pressure in pyrolysis furnace and stable recovery and utilization of non-condensable gas

The non-condensable gas from the pyrolysis furnace is usually acidic and easy to corrode the equipment, resulting in short service life of the equipment and difficulty in tail gas treatment

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