Recycling system for fly ash
A technology for fly ash and fine ash, which is applied in the field of power plant fly ash recycling system, can solve problems such as fly ash environmental pollution, and achieve the effects of good product quality, improved workability, and fast heating speed
Inactive Publication Date: 2017-11-03
CHNA ENERGY INVESTMENT CORP LTD +2
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Problems solved by technology
[0004] The main purpose of this application is to provide a fly ash recycling system to solve the problem of environmental pollution caused by a large amount of fly ash produced by power plants in the prior art
Method used
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[0045] The local schematic diagram of the fly ash recycling system is figure 1 , the recycling system includes a centrifuge 2, a cyclone separator 3, a dust collector 4, an induced draft fan 5, a coarse ash storage bin 6, a binder storage bin (not shown in the figure), a water storage tank (not shown in the figure) shown), metering equipment (not shown in the figure), ball forming equipment 7, preheater 8, feed microwave suppressor 9, microwave tunnel kiln 10, discharge microwave suppressor 11, microwave energy feeding equipment 12, microwave Conduit 120, electric control equipment 13, water cooling equipment 14, cooler 15, crushing and screening equipment 16, denitrification, desulfurization and dust removal device 17, and fine ash storage bin 18, wherein the cooler is a heat exchanger. For the specific connection relationship, please refer to the above content and figure 1 , which will not be repeated here.
[0046] The working process of the recycling system includes:
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Abstract
The invention provides a recycling system for fly ash. The recycling system comprises a separation device, a balling device and a microwave heating device. The separation device is connected with a fly ash storage bin and is used for separating the fly ash to obtain coarse ash and fine ash, wherein the grain size of the coarse ash is smaller than 1000 mesh, and the grain size of the fine ash is larger than 1000 mesh. The balling device communicates with a coarse ash outlet of the separation device and manufactures wet balls through the coarse ash, a bonding agent and water. The microwave heating device communicates with an outlet of the balling device and is used for sintering the wet balls into ceramsite. By means of the recycling system, the fly ash of power plants is utilized in a classified manner, the fly ash discharged by the power plants at present is completely utilized, the zero-emission effect is achieved, and the pollution problem caused by the large-amount emission of the fly ash of the power plants to the environment is solved.
Description
technical field [0001] The application relates to the field of chemical industry, in particular to a recycling system for fly ash of power plants. Background technique [0002] Fly ash is a fine particle produced during the combustion of coal in the boiler of a thermal power plant. It is a powdery solid mixture formed after the flue gas is discharged from the furnace. It is a kind of industrial waste. It mainly includes SiO 2 、Al 2 o 3 , CaO, Fe 2 o 3 , carbon and other metal and non-metal oxides. [0003] At present, my country's electricity production is still dominated by coal-fired power generation, and the operation of coal-fired power plants will produce a large amount of fly ash. According to statistics, by the end of 2015, my country's installed capacity of thermal power reached 1.02 billion kilowatts, and the annual discharge of fly ash was about 600 million tons. ) are likely to cause pollution of surface water, groundwater and atmospheric environment, endang...
Claims
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IPC IPC(8): B09B3/00C04B33/135
CPCC04B33/1328C04B33/1352B09B3/00C04B2235/667B09B2101/30Y02W30/82Y02P40/60
Inventor 陈磊张永桂
Owner CHNA ENERGY INVESTMENT CORP LTD