Composite type cold slag device

A slag cooling device and a composite technology, applied in the field of slag cooling devices, can solve problems such as insufficient output, insufficient cooling of large slag, and influence on combustion in the furnace, and achieve the effects of improving adaptability, ensuring output effect, and enhancing cooling effect

Inactive Publication Date: 2008-01-09
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These existing technologies have one or more of the following shortcomings in design and operation: too large a proportion of air cooling, poor fluidity of bottom slag, insufficient cooling of large slag, poor recovery of fine particles, etc., resulting in frequent occurrences in actual operation. Problems such as clogging, coking, insufficient output, and affecting combustion in the furnace cannot meet the needs of actual operation and large-scale development of circulating fluidized bed boilers

Method used

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  • Composite type cold slag device
  • Composite type cold slag device
  • Composite type cold slag device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A kind of composite cold slag device of this embodiment is shown in Figure 1, Figure 2, Figure 3 and Figure 4, and the frame 8-1 of its cold slag chamber 8 is welded into a square body by steel plate, angle steel, channel steel, and internally mixes Insulation layer 8-2 and refractory layer 8-3, the first partition wall 4 and the second partition wall 6 perpendicular to the slag flow direction are arranged in the cold slag chamber 8, the first partition wall 4 and the second partition wall 6 will The inner space of the cold slag chamber 8 is divided into three cooling chambers connected at the upper part: the cooling chamber at the left end is the slag inlet cooling chamber 2, the middle cooling chamber is the first water-cooling chamber 5, and the cooling chamber at the right end is the second water-cooling chamber 7; Independent air chambers 17 are arranged at the lower part of each cooling bin. Among them, a dense-hole air distribution plate 19 is arranged on the lef...

Embodiment 2

[0029] A kind of composite cooling slag device of this embodiment is shown in Fig. 5, Fig. 6 and Fig. 7, and the structural difference with embodiment 1 is: the cold slag chamber 8 has four components in the slag cooling device, consists of frame 8 -1, thermal insulation layer 8-2, refractory layer 8-3, membrane water wall 8-4. The surrounding walls of the slag inlet cooling chamber 2 and the walls of the slag inlet and outlet are all frame 8-1 structures. The frame 8-1 is welded by steel plates, angle steels, and channel steels, and is lined with insulation layer 8-2 and refractory layer 8-3 ; And the front and rear walls and the upper wall of the first water-cooled cooling chamber 5 and the second water-cooled cooling chamber 7 are all made of membrane water-cooled wall 8-4, and membrane-type water-cooled wall 8-4 is welded and connected with frame 8-1. The arrangement of the membrane water wall 8-4 increases the heating surface of the entire slag cooling device and improves...

Embodiment 3

[0031] A composite slag cooling device of this embodiment is shown in Figure 8. The structural difference from Embodiment 1 is that in the structural arrangement of the slag inlet cooling bin 2, the dense-hole air distribution plate 19 is located at the slag inlet cooling bin 2. At the center of the bottom, the ratio of the area of ​​the dense-hole air distribution plate 19 to the cross-sectional area of ​​the upper straight section of the slag inlet cooling chamber 2 is 0.2 to 0.7, and the upper part of the dense-hole air distribution plate 19 is arranged with a straight acceleration section inclined to the left and right sides On the end face, the main large slag discharge pipe 18 is arranged on the dense-hole air distribution plate 19, and the corresponding variable-pitch water-cooled auger slag cooler 16 is arranged at the outlet. Other structural arrangements and cooperation are the same as in Embodiment 1.

[0032] Each cooling chamber in the slag cooling chamber of the ...

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Abstract

The invention relates to combined type cold slag device. It includes cold slag room, air chamber, and water cooling packing auger cold slag machine. The cold slag room is set two divider to divide it into three cooling room. The second divider lower is set hole. The first cooling room is spouted bed structure of which bottom is set close-hole type grid plate on which the main slag discharge pipe is set. The back two cooling rooms are set water cooling tube bank, and funnel cap type grid plate at the bottom. The invention can satisfy the demands of big feeding coal granularity, actual motion and macro-scale operations technology development for circulating fluidized bed boiler.

Description

technical field [0001] The invention relates to a slag cooling device for a thermal power plant boiler, which is suitable for cooling the slag of a circulating fluidized bed boiler. Background technique [0002] At present, with the successful commercialization of several domestic 300MW-class circulating fluidized bed coal-fired boilers and the domestic 600MW supercritical circulating fluidized bed boiler entering the research and development stage, the process of circulating fluidized bed boiler technology to high-parameter large-scale is accelerating, and the boiler Important changes have taken place in the gas-solid flow characteristics in the furnace, requiring the corresponding slag cooler to meet the requirements of high-parameter circulating fluidized bed boilers. In the future operation of large-scale slag coolers, the recovery of fine particles in slag discharge will be more important, and the heat transfer mode in the slag cooler will be changed from air cooling to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23B70/00F23B101/00
Inventor 卢啸风陈继辉舒茂龙刘汉周陈玉良王伟林王军
Owner CHONGQING UNIV
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