Start-up compound burner for water-coal-slurry or coal dust gasification furnace

Abstract

The invention provides a start-up compound burner for a water-coal-slurry or coal dust pressure gasification furnace. The start-up compound burner comprises a fuel gas passage pipe and a combustion-supporting gas passage pipe which are coaxially sheathed with each other and respectively arranged inside and outside, and ignition electrodes, wherein the fuel gas passage pipe is connected with the combustion-supporting gas passage pipe through two flanges, the two flanges are sealed by a gasket, the size of an annular space between a flow passage at the front end of the combustion-supporting gaspassage pipe and the fuel gas passage pipe is adjusted by the thickness of the gasket, and the ignition electrodes are arranged outside the combustion-supporting gas passage pipe and extended to the front ends of the fuel gas passage pipe and the combustion-supporting gas passage pipe. The start-up compound burner has the advantages of compact structure and space saving. The burning of various fuel gases can be realized by adjusting the fuel gas passage. During the actual operation, the burner can automatically ignite and keep temperature rise stable. Besides, the invention can also lower thework intensity of on-site personnel, and can perform continuous operations of baker and chemical industrial feeding without being dismantled after the installation in cold conditions.

Description

technical field [0001] The invention relates to a pressurized gasification device for coal water slurry or pulverized coal, in particular to a composite burner for starting a pressurized gasification furnace for coal water slurry or pulverized coal. Background technique [0002] Coal gasification technology is a technology that can efficiently and cleanly utilize coal. At present, it has become one of the leading technologies for solving environmental pollution problems in all countries in the world, and it is also an important field of international competition. In the coal pressurized gasifiers that have been industrialized in various countries in the world, the different types of composite burners used in the start-up process have their own advantages and disadvantages. [0003] The key equipment of coal water slurry or pulverized coal pressurized gasification technology is the gasifier, and the gasifier must use a start-up burner when it is started. Taking the new coal-...

AI Technical Summary

Problems solved by technology

This is an operation method currently used in industrialized devices. The disadvantage of this method is that it takes a long time to deal with flameout accidents and the labor intensity is high.

Under the original oven conditions, this temperature that cannot change according to the heating curve will reduce the service life of refractory bricks

[0005] When the water-cooled wall pulverized coal gasifier is started, use the start-up burner to raise the temperature of the gasifier to a certain temperature to feed the coal powder. At this time, the start-up burner cannot be removed due to the temperature and pressure in the furnace. Therefore, many water-cooled The start-up burners, ignition guns, and fire detection devices of the wall gasifier device are all set separately, which not only causes low utilization rate of some equipment and devices, but also increases the expenditure

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