Furnace roasting system and furnace roasting method for water cooling wall gasification furnace

Abstract

The invention discloses a furnace roasting system and furnace roasting method for a water cooling wall gasification furnace. The furnace roasting system comprises a fuel heater, a flue gas generator,a fan, an air preheater, a gasification furnace and a temperature monitoring device. A fuel enters a flue gas generator through the fuel heater, and the fuel heater improves the adaptability of the fuel of the furnace roasting system, so that a gas fuel can be used and a liquid fuel can be used, too. Meanwhile, a fuel flow control system is used for measuring and controlling the flow of a fuel. Air pressurized by the fan and heated by the air preheater enters the flue gas generator, the air flow is measured and controlled through an air flow control system, the fuel and air flow distribution is adjusted according to flue gas components measured by a flue gas analyzer, the furnace roasting temperature is measured to adjust the fuel and air flows according to the temperature monitoring device, so that the proportion of the fuel and air flows is controlled accurately, the incomplete combustion heat loss and exhaust gas heat loss of the fuel can be reduced, and heat of high-temperature flue gas is recycled by means of the air preheater, so that energy is utilized.

Description

technical field [0001] The invention relates to the technical field of coal gasification, in particular to an oven system and an oven method for a water-cooled wall gasifier. Background technique [0002] Coal gasification technology is one of the core technologies for clean and efficient utilization of coal, and its core equipment is the gasifier. According to the structure and materials of the gasifier furnace, the gasifier can be mainly divided into a refractory brick gasifier and a water-cooled wall gasifier. Compared with refractory brick gasifiers, water-cooled wall gasifiers have higher thermal efficiency and wider adaptability to coal types. The coal gasification reaction in the gasifier involves complex physical and chemical processes under high temperature, high pressure, and multiphase conditions. The coal gas generated by the reaction contains a small amount of corrosive gases such as hydrogen sulfide and hydrogen cyanide, and high-temperature ash is also produc...

AI Technical Summary

Problems solved by technology

This flow ratio and adjustment method is not accurate enough, nor can it respond to changes in fuel composition in a timely manner

The hot flue gas generated by the oven system is directly discharged to the atmosphere after the oven, causing a large amount of heat loss and thermal pollution of the environment. When the fuel is not fully burned, the carbon monoxide contained in the flue gas will also cause environmental pollution and safety issues

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