High-speed rotational-flow coal spreading air inlet structure of circulating fluidized bed boiler
A circulating fluidized bed and air inlet structure technology, applied in the boiler field, can solve the problems of low boiler thermal efficiency, small momentum of air-powder mixture, high carbon content in boiler slag, etc.
Inactive Publication Date: 2017-08-25
SICHUAN CHUANGUO BOILER
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Problems solved by technology
The speed of the traditional coal sowing wind at the coal inlet is low and it is in a direct blowing state, which only plays the role of sending coal powder into the furnace. However, the coal particles and the coal sowing wind are not mixed uniformly, and the momentum of the air powder mixture is small, and some of them are not Completely burned particles will be directly discharged from the slag outlet, resulting in high carbon content in the boiler slag and low boiler thermal efficiency
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[0018] The present invention will be further described below in combination with specific embodiments and accompanying drawings.
[0019] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0020] Such as Figure 1-2 It is an embodiment of a high-speed swirling coal sowing air inlet structure for a circulating fluidized bed boiler of the present invention. A high-speed swirling coal sowing air inlet structure for a circulating fluidized bed boiler includes: an air inlet main pipe 1, and the air inlet main pipe 1 is connected to the taper pipe 4 at one end, the other end of the air inlet main pipe 1 is provided with a coal inlet pipe 2, and the coal inlet ...
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The invention discloses a high-speed rotational-flow coal spreading air inlet structure of a circulating fluidized bed boiler. The high-speed rotational-flow coal spreading air inlet structure comprises an air inlet main tube, wherein one end of the air inlet main tube is connected with a tapered tube; the other end of the air inlet main tube is equipped with a coal inlet tube; the coal inlet tube extends into the air inlet main tube; a coal spreading air tube is arranged on the side surface of the air inlet main tube; the axial center line of the coal spreading air tube and the radial center line of the air inlet main tube are not collinear, i.e., the coal spreading air tube and the air inlet tube are arranged in an eccentric mode, so that rotational-flow air can be formed; and by improving an arrangement form of coal spreading air, the coal spreading air and pulverized coal are mixed more uniformly, so that combustion is more sufficient, carbon content of large slag is reduced, and thermal efficiency of the boiler is improved.
Description
technical field [0001] The invention relates to the field of boilers, in particular to a high-speed swirling coal sowing air inlet structure for a circulating fluidized bed boiler. Background technique [0002] At present, with the vigorous promotion of national energy conservation and emission reduction policies, the demand for reducing the carbon content of boiler slag and improving boiler thermal efficiency is becoming stronger and stronger. The speed of the traditional coal sowing wind at the coal inlet is low and it is in a direct blowing state, which only plays the role of sending coal powder into the furnace. However, the coal particles and the coal sowing wind are not mixed uniformly, and the momentum of the air powder mixture is small, and some of them are not Completely burned particles will be directly discharged from the slag outlet, resulting in high carbon content in the boiler slag and low boiler thermal efficiency. [0003] The circulating fluidized bed boil...
Claims
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IPC IPC(8): F23C10/20
CPCF23C10/20F23C2206/10
Inventor 徐定恒徐洪亮张旭海王伟伟弋治军张炜王玉琳
Owner SICHUAN CHUANGUO BOILER