Integrated processing system and method thereof of improving use value of coal-fired boiler ash

Abstract

The invention discloses an integrated processing system and a method thereof of improving use value of coal-fired boiler ash. The integrated processing system comprises an ash processing system which is used for breaking and grinding of received boiler ash and manufacturing the boiler ash into available raw materials. The ash processing system comprises an ash breaking device, an ash grinding device and a separation device, the ash breaking device receives ash outputted by a boiler and breaks the ash into 100mm, the ash grinding device is used for grinding the ash after broken below 45 micrometers, the separation device is connected with an outlet of the ash grinding device and used for separating of the ash after ground, qualified ash is used as the available raw materials, and the unqualified ash is returned to the ash grinding device to continue to grind. The integrated processing system directly conducts breaking, grinding and separation processing for the ash, enables fine ash after ground not to pass through equipment, such as a coal pulverizing system, a boiler furnace, a coal economizer and an air pre-heater, keeps stability of the coal-fired boiler ash in the process of ash processing, and prevents the equipment, such as a pipeline, the coal economizer and the air pre-heater from being abraded by ash particles.

Description

technical field [0001] The invention belongs to the technical field of coal-fired boiler ash treatment, and in particular relates to an integrated treatment system and method for improving the utilization value of coal-fired boiler ash. Background technique [0002] Boiler ash is a product of thermal power plants. Its stockpiling not only takes up a lot of land, but also causes some pollution to the environment. How to improve the comprehensive utilization value of ash and make it turn waste into treasure has become a focus of research in recent years. [0003] Chinese patent document CN101002056 discloses an integrated system for extracting heavy ash, converting it into light ash and reducing unburned matter, which grinds boiler bottom slag and economizer coarse ash through a coal mill, and then passes through a boiler The burner is mixed with pulverized coal and sent into the furnace to reduce the unburned substances in the ash. The purpose of the above-mentioned patent d...

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Problems solved by technology

[0006] 3) Since the calorific value of unburned substances in ash is far lower than that of pulverized coal, spraying a large amount of ash into the furnace will reduce the combustion efficiency of the boiler;

[0007] 4) As ash enters the furnace, which affects the original design of the furnace, the primary and secondary air volumes of the boiler need to be readjusted, and the combustion state also changes accordingly, which reduces the stability of the boiler combustion;

[0008] 5) Coarse ash and slag are transported to the cyclone separator through the pipeline. Due to the large particle size of the slag, the wear and tear on the pipeline and separator is very serious, and the maintenance amount is large

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