Garbage pyrolysis and gasification incineration system and process

Abstract

The invention particularly relates to a garbage pyrolysis and gasification incineration system and process. According to the garbage pyrolysis and gasification incineration system, a pyrolysis and gasification furnace, a high-temperature heat exchanger, a quench tower, a demister, a dust collector and an exhausting device are connected successively, and the pyrolysis and gasification furnace is provided with a drying area, a pyrolysis area, a gasification area, an ash after-combustion area and a gas combustion area which are integrally formed. The drying area is further provided with an exhaust gas recovery pipeline to extract water vapor generated in a garbage drying process on the one hand to improve the stability of garbage pyrolysis and gasification and combustion reaction processes, and on the other hand, the dried exhaust gas can be further taken as primary combustion air of gas combustion. Heat generated by garbage incineration is distributed again to enter an incineration furnace to assist garbage combustion. The system can operate stably by controlling an air distribution proportion without extra energy for supporting combustion. A low generation rate of pollutants such asdioxin, heavy metals, oxynitride and oxysulfide can be further guaranteed. The garbage pyrolysis and gasification incineration system and process have good popularization and application value.

Description

technical field [0001] The invention belongs to the technical field of solid waste treatment, and in particular relates to a waste pyrolysis gasification incineration system and a waste incineration process using the system. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] At present, direct incineration and pyrolysis gasification incineration are the main ways to reduce the amount of domestic waste. Since waste raw materials are not convenient for long-distance transportation, and the investment and operating costs of incineration power generation projects are relatively high, it is not suitable for domestic waste to be incinerated for power generation alone in hilly, mou...

AI Technical Summary

Problems solved by technology

[0004] However, under the background of no large-scale promotion of classified collection and disposal of domestic waste or poor classification, the composition of domestic waste materials is complicated, the moisture content is high, and there is generally no independent drying process before incineration or pyrolysis gasification disposal. The moisture and the raw materials enter the flue gas after undergoing pyrolysis, gasification, combustion and other processes

Moisture lowers the calorific value of waste raw materials, affects the stable operation of the reactor, and is prone to unstable gas products, high residual organic matter content in ash, large fluctuations in reaction temperature, and even flameout

Generally, additional fuel such as fuel oil or gas is required to maintain the stable operation of the reactor and realize effective and environmentally friendly disposal of waste raw materials, but the operating cost is high

On the other hand, if the moisture in the garbage enters the flue gas, it will also cause problems such as high moisture content in the flue gas, corrosion of equipment, and difficulties in flue gas purification and treatment.

Images