Environmental protection and energy saving circulating fluidized bed boiler

A circulating fluidized bed, energy-saving technology, applied in the direction of fluidized bed combustion equipment, combustion type, fuel burned in a molten state, etc., can solve the problem of unreasonable secondary air structure, low separator separation efficiency, oxygen-poor areas, etc. problem, achieve the effect of saving energy consumption, reducing wear and tear, and improving combustion efficiency

Active Publication Date: 2017-07-07
哈尔滨红光锅炉总厂有限责任公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem that the existing furnace is severely worn by the falling particle flow of the attached wall, the separation efficiency of the separator is low, and the structure of the secondary air is unreasonable, which often causes the oxygen-depleted area, an environment-friendly and energy-saving cycle is proposed. fluidized bed boiler

Method used

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  • Environmental protection and energy saving circulating fluidized bed boiler
  • Environmental protection and energy saving circulating fluidized bed boiler
  • Environmental protection and energy saving circulating fluidized bed boiler

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specific Embodiment approach 1

[0029] Specific implementation mode one: combine Figure 1 to Figure8 Describe this embodiment. An environmentally friendly and energy-saving circulating fluidized bed boiler in this embodiment includes a membrane water-cooled hearth 2, a cyclone separator 3, a feeder 4, a secondary air 5, an air chamber 6, and an ignition device 7 , the tail heating surface 8, the air preheater 9 and a plurality of air caps 1, the bottom of the membrane water-cooled hearth 2 is provided with a first air distribution plate, the first air distribution plate is evenly equipped with a plurality of air caps 1, the first air distribution plate The lower end of the air plate is provided with an air chamber 6, the side of the air chamber 6 is provided with an ignition device 7, the lower end side wall of the membrane water-cooled hearth 2 is provided with a coal delivery port 17, and the lower end of the membrane water-cooled hearth 2 is provided with two The secondary wind 5, the upper end outlet of...

specific Embodiment approach 2

[0034] Specific implementation mode two: combination Figure 4 and Figure 5 The present embodiment will be described. The inclination angle α of the first inclination section KL in the present embodiment is 15°. In such a setting, the falling particle flow of the attached wall directly scours the wear-resistant castable 10 during the descending process, thereby forming an effective protection for the furnace water wall. At the same time, the first inclined section KL can block the falling particle flow of the attached wall, so that it cannot Grinding the top surface of the castable 10 causes wear. Other components and connections are the same as those in the first embodiment.

specific Embodiment approach 3

[0035] Specific implementation mode three: combination Figure 4 and Figure 5 Describe this embodiment, the inclination angle β of the second inclination section LT of this embodiment 1 is 10°, the inclination angle β of the fourth inclination segment RP 2 is 15°. Such a design can make the membrane water-cooled hearth 2 form a good cone section, so that the falling particle flow of the wall can smoothly flow down the wall. Other compositions and connections are the same as those in Embodiment 1 or 2.

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Abstract

The invention provides an environmentally-friendly energy-saving type circulating fluidized bed boiler, relates to a circulating fluidized bed boiler and solves the problems that an existing hearth is worn by an attached wall falling particle flow seriously, the separation efficiency of a separator is low, a secondary wind structure is unreasonable, and a lean oxygen area is frequently caused. A water cooling wall pipe on a front water cooling wall and a rear water cooling wall at the lower end of a membrane type water cooling wall hearth sequentially comprises a first inclined segment and a second inclined segment from top to bottom, and a water cooling wall pipe on a lateral water cooling wall at the lower end of the membrane type water cooling wall hearth sequentially comprises a third inclined segment, a first vertical segment, a fourth inclined segment and a second vertical segment from top to bottom; a cyclone separator comprises a cylinder, a conical cylinder, a vertical tube, an inlet long flue and a center cylinder, and secondary wind is single-layer secondary wind. According to the environmentally-friendly energy-saving type circulating fluidized bed boiler, a fixed state design theory is adopted, a flow state reconstruction method is utilized to improve the quality of beds and lower the stock of beds, low emission, low energy consumption, low bed pressure, low abrasion and stable operation of the boiler are achieved, and the environmentally-friendly energy-saving type circulating fluidized bed boiler can be used for power generation, industrial production and concentrated heat supply.

Description

technical field [0001] The invention relates to a circulating fluidized bed boiler, in particular to an environment-friendly and energy-saving circulating fluidized bed boiler. Background technique [0002] In the past thirty years, circulating fluidized bed (CFB) combustion technology has developed rapidly in China, and has experienced several development stages such as foreign introduction, introduction and digestion, and independent development. At present, circulating fluidized bed boilers are used in power generation, industrial production and centralized It is widely used in heating, and environmental protection, energy saving and stable operation are the necessary conditions to ensure the development of circulating fluidized bed boilers with high parameters and large capacity. [0003] A circulating fluidized bed boiler system is usually composed of a furnace, a separator, a feeder, a rear heating surface, and auxiliary equipment. After the coal and desulfurizer are f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F23C10/10F23C10/18F23C10/20
CPCF23C10/10F23C10/18F23C10/20F23C2206/10F23C2900/10007
Inventor 张福强张辉刘志明吕雪艳魏少博
Owner 哈尔滨红光锅炉总厂有限责任公司
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