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Chain-type slag-off controlling cooler for fluidized bed boiler

A technology for fluidized bed boilers and controlled cooling, applied in the field of fluidized bed boilers, can solve the problems of large water consumption, control of boiler slag, wear and other problems, and achieve the effects of improving heat exchange efficiency, improving cooling efficiency, and reasonable air volume distribution

Inactive Publication Date: 2003-03-19
XIAN THERMAL POWER RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the high slag discharge temperature of the fluidized bed boiler and the large bottom slag particles, it is difficult to continuously and stably control the amount of slag discharged from the boiler by means of pneumatic control.
However, the price of water-cooled augers is high, the water consumption is large, and there are problems such as serious wear and tear.

Method used

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  • Chain-type slag-off controlling cooler for fluidized bed boiler
  • Chain-type slag-off controlling cooler for fluidized bed boiler
  • Chain-type slag-off controlling cooler for fluidized bed boiler

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The invention is the key equipment for the bottom slag treatment of the fluidized bed boiler, which is used for controlling and cooling the slag discharge of the fluidized bed boiler, recovering the waste heat of slagging, and providing necessary conditions for the subsequent continuous slagging system. like figure 1 , 2, and 3, the high-temperature hot slag discharged from the fluidized bed boiler enters the slag discharge uniform flow tank 3 through the slag inlet 2, and then falls on the adjustable-speed chain-belt grate 5. By adjusting the grate speed, Control the amount of slag discharge of the fluidized bed boiler, and at the same time, the fire grate is used as the air distribution device of the slag discharge control cooler to cool the slag during the process of introducing and transporting slag into and out of the slag discharge control cooler. The grate type can be chain or belt, so it is collectively called chain belt slag discharge control cooler. The cold ...

example 2

[0033] When high ash coal is used, air-water combined cooling chain belt type slag discharge control cooler can be used, as shown in Figure 4 and 5. The air-water combined cooling chain belt-type slag discharge control cooler includes a tubular heating surface 14 , an inlet and outlet water header 15 , and a partition wall 16 . The partition wall 16 divides the slag discharge control cooler into a high-temperature section and a low-temperature section, and a water-cooled heating surface 14 is arranged in the high-temperature section to cool the hot air in the high-temperature section. The hot slag in the lower part is in direct contact with the cold air for heat exchange, and the hot air in the upper high-temperature section exchanges heat with the water-cooled heating surface, and the discharged hot air is used as the secondary air of the fluidized bed boiler. The fluidized bed boiler itself still has a secondary air preheater. The cold air of the slag discharge control cool...

Embodiment 3

[0035] When it is necessary to arrange the chain-belt grate obliquely, such as Image 6 As shown, tilt the chain-belt grate at a certain angle, adjust the movement speed of the chain-belt grate, and control the amount of slag. Others are the same as in Example 1.

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Abstract

The chain-type slag-off controlling cooler for flouidized bed boiler has inside the casing one slag-off flow equalizing channel communicated with the slag inlet, one speed regulating chain type grate below the slag-off flow equalizing channel, one cold draft separating chamber, one hot draft outlet and one slag outlet communicated with the casing below the chain type grate. The speed regulating chain type grate is used as draft distributor and slag-off controller, the boiler may exhaust slag continuously stable and controllably. Separating air blowing is favorable to the sectional regulation of cooling draft, reasonable distribution of draft amount and high cooling efficiency of the slag-off controlling cooler.

Description

Technical field [0001] The invention belongs to equipment in the field of fluidized bed boilers, in particular to a chain-belt type slag discharge control cooler for circulating fluidized bed boilers. Background technique [0002] In the auxiliary system of the fluidized bed boiler, the slag discharge control cooler is one of the most difficult technical difficulties. With the increase of the capacity of the fluidized bed boiler, the requirement for the reliability of the slag discharge control cooler is getting higher and higher, and it should be able to ensure the continuous, stable and controllable slag discharge of the boiler. However, due to the high slag discharge temperature of the fluidized bed boiler and the large bottom slag particles, it is difficult to continuously and stably control the amount of slag discharged from the boiler by means of pneumatic control. However, the price of water-cooled augers is high, the water consumption is large, and there are problem...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23C10/12
Inventor 蒋敏华徐正泉马丽锦李光华孙献斌
Owner XIAN THERMAL POWER RES INST CO LTD
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