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Sealed fluid back-feeder

A technology of returning material and fluidization, which is applied in the direction of fluidized bed combustion equipment, fuel burning in a molten state, combustion type, etc., can solve problems such as stagnation of operation, reverse channeling separator, unstable operation, etc., and achieve smooth flow and air volume Ease of adjustment, improved stability and reliability

Inactive Publication Date: 2007-04-25
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, practice shows that when this kind of feeder is applied to small and medium-capacity circulating fluidized bed boilers, the operation will stagnate, resulting in slagging at high temperature and furnace flue gas reverse channeling separator, resulting in unstable operation and other problems

Method used

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  • Sealed fluid back-feeder
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Embodiment Construction

[0015] As shown in Figure 1 to Figure 4, 1-material inlet 1, 2-top surface, 3-rear wall, 4-moving bed, 5-partition, 6-ash outlet, 7-air chamber, 8-air distribution Plate, 9-material outlet, 10-fluidized bed, 11-directional air cap, 12-slit, 13-air cap, 14, 15-opposite side walls, 16-the small hole on the directional air cap.

[0016] Shown in Fig. 1 and Fig. 2, the bottom surface of the present invention is the air distribution plate 8, and the weight of the carrying device itself is equipped with a heat-resistant steel dividing plate 5 between the opposite side walls 14 and 15, and the dividing plate 5 is welded on On the two side walls 14 and 15, the upper end can extend into the refractory layer of the top surface 2. The slit 12, the partition plays a sealing role to prevent the flue gas from flowing back to the separator when the furnace pressure fluctuates. The ash discharge port 6 is arranged on the air distribution plate 8, and the ash discharge port 6 is connected wit...

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Abstract

A fluidized and sealed material returning apparatus for the circulating fluidized-bed boil, gasifying furnace, etc features that the middle and lower part of the back wall for the moving bed is inclined by an angle which is greater than the static angle of circulated material but less than 90 deg, the active area of moving bed is smaller than that of fluidized bed, a perforated directional blast cap is installed on the air distributing plate of moving bed, and a single wind chamber is arranged under said air distributing plate. Its advantages are simple structure and high reliability and stability.

Description

technical field [0001] The invention relates to a material returning device in a circulating fluidized bed system. Background technique [0002] Circulating fluidized bed combustion technology has become an important content of clean coal utilization technology in my country at this stage. Circulating fluidized bed combustion implements low-temperature intensified combustion, which can burn various coal, straw, fruit shells, forest industrial waste and other biomass, garbage and other industrial and domestic solid waste, and can add limestone and other desulfurizers to the furnace , to achieve high-efficiency and economical desulfurization in the combustion process, so it has the outstanding advantages of wide fuel adaptability, high combustion efficiency, and low pollutant emissions. The circulating fluidized bed boiler is mainly composed of a furnace combustion chamber, a separator, a feeder, and a tail flue. The main function of the feeder is to send the fly ash separate...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F23C10/04F23C10/26F23C101/00
Inventor 张世红陈汉平刘德昌郑楚光
Owner HUAZHONG UNIV OF SCI & TECH