Gasification combustion hydrolyzing auxiliary combustion device and method of pulverized coal

Abstract

The invention provides a gasification combustion hydrolyzing auxiliary combustion device and method of pulverized coal. The technical scheme of the invention is as follows: a concentrated-diluted separator is used to divide a pulverized coal stream into two pulverized coal streams-a concentrated phase pulverized coal stream and a diluted phase pulverized coal stream under the action of pneumatic conveying; the concentrated phase pulverized coal stream enters a gasification chamber through a concentrated phase pulverized coal stream channel to be ignited and gasified instantly under the actionof a gas fuel injector; the diluted phase pulverized coal stream containing fine pulverized coal enters in a vaporizing combustion chamber through the side channel of the gasification chamber and is combined with a flame type stream to mix with combustion air allocated by a fuel gas combustion section, burn vigorously and provide energy continuously for the energy consuming equipment in the flameform. The device and method of the invention adopts concentrated pulverized coal and diluted pulverized coal streams to enter the gasification section through different routes, air is supplied by a combustion air cavity at the inlet end of the vaporizing combustion chamber and a combustion air cavity on the right side of a diluted phase pulverized coal cavity; and different air quantities are adopted to fully mix pulverized coal and air, and the pulverized coal can burn fully. Experiments show that the combustion efficiency can be increased by about 5-10%.

Description

technical field [0001] The invention belongs to the technical field of pulverized coal gasification combustion, and in particular relates to a pulverized coal gasification combustion device and a hydrolysis combustion-supporting method. Background technique [0002] The gasification and combustion of coal is a major technical issue to complete the clean combustion of coal, save energy and reduce emissions. [0003] Traditional pulverized coal combustion mainly adopts blunt body steady flame and swirling fluid steady flame technology. The pulverized coal burner designed by these two technical methods can only be applied to room-fired, large-scale power boilers with hot air distribution combustion , the pulverized coal burner designed using the blunt body flame stabilization method and the swirl flame stabilization method can only be used as a single combustion component, and must be used in conjunction with a multi-component system, and requires accurate installation and comm...

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Problems solved by technology

For coal-fired grate furnaces, the combustion efficiency is between 50% and 65%, and the thermal efficiency is less than 75%, accounting for more than 90%.

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