A method for preparing kaolin circulating fluidized bed furnace return feeder
A technology of circulating fluidized bed and feeder, applied in the fields of environmental protection and comprehensive utilization of resource recycling, to achieve the effects of ensuring separation efficiency, reducing production costs, and reducing the height of the material column
Active Publication Date: 2019-04-16
永春县产品质量检验所福建省香产品质量检验中心国家燃香类产品质量监督检验中心福建
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Problems solved by technology
[0003] The purpose of the technical solution proposed in prior art 1 is to facilitate installation and disassembly, greatly prolong its service life and reduce cleaning time and strength. The air supply of the circulating fluidized bed furnace is high wind pressure and small air volume. The high wind pressure requires a higher material column in the standpipe, and the small air volume requires less return material and a low material column. The two are contradictory. The existing technical solutions cannot solve the above-mentioned practical problems; prior art 2 adopts the technical solution of sending high-temperature circulating materials back to the furnace at multiple points, the purpose of which is to reduce the fluidization and temperature unevenness caused by the centralized return of materials to a large-area bed surface and cannot substantially solve the above practical problems
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[0016] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
[0017] Such as figure 1 , figure 2 Shown, a kind of preparation kaolin circulating fluidized bed furnace refeeder using method is characterized in that:
[0018] Step 1: After the coal is fluidized and burned in the hearth of the circulating fluidized bed coal-fired furnace, it enters the cyclone separator, and the larger high-temperature solid particles separated by the cyclone separator enter the feeder 1, and the high-temperature solid particles enter the feeder 1 A material column is formed in the standpipe 3. There is a U-shaped valve 4 between the standpipe 3 and the return pipe 5. There is an equal-pressure air chamber at the bottom of the U-shaped valve 4 to supply air to ensure the fluidization of high-temperature solid particles. The material in the standpipe 3 The pressure difference between the column and the chamber pressure dri...
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The invention relates to the technical field of environmental protection and resource recycling and comprehensive utilization, in particular to a method for using a return feeder for preparing kaolin circulating fluidized bed furnace. Its characteristics are: through the design of the guide pipe next to the outlet of the return pipe, the local chamber pressure at the outlet of the return pipe is reduced, thereby reducing the height of the material column of the standpipe, achieving the purpose of material balance and ensuring separation efficiency, and making the circulation fluidized Bed coal-fired furnace and roasting activation rotary kiln can be effectively combined and run normally.
Description
technical field [0001] The invention relates to the technical field of environmental protection and resource recycling and comprehensive utilization, in particular to a method for using a return feeder for preparing kaolin circulating fluidized bed furnace. Background technique [0002] Kaolin is widely used, mainly used in papermaking, ceramics, rubber and plastics, chemical industry, paint, medicine and other industries. The main mineral component of kaolin is kaolinite, and the crystal chemical formula of kaolinite is 2SiO 2 ·Al 2 o 3 2H 2 O, through the calcination process to remove organic matter and lattice reconstruction; mechanical pulverization and jet pulverization to a sufficient fineness to meet the requirements of preparing fillers such as cable plastics and rubber sealing rings, paper coatings, molecular sieves, and catalyst carriers. Circulating fluidized bed coal-fired boiler fly ash is the most common waste in the boiler production process, the main compo...
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IPC IPC(8): F23C10/26
CPCF23C10/26
Inventor 杨松
Owner 永春县产品质量检验所福建省香产品质量检验中心国家燃香类产品质量监督检验中心福建