Compact circulating fluidized bed boiler with special division wall
A technology of circulating fluidized bed and partition wall, which is applied in the direction of fluidized bed combustion equipment, combustion type, fuel burned in a molten state, etc., can solve the problems of low height of the lower standpipe of the separator, burst pipe, local wear, etc., and achieve It is beneficial to the suspension load-bearing and expansion design, simplifies the ash circulation loop, and reduces the wear and tear in the furnace
Active Publication Date: 2010-04-21
XIAN THERMAL POWER RES INST CO LTD
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Problems solved by technology
[0003] The traditional external heat exchanger needs to occupy a certain height. Due to the limitation of the structure of the separator and the feeder, the height of the lower vertical pipe of the separator is often lower, and it is difficult to form a sufficient material seal, which affects the separation efficiency and the external circulation loop. In addition, due to the limited space, the heating surface of the external heat exchanger is generally arranged too densely, which is prone to problems such as vibration, local wear, and tube burst during operation, and is difficult to repair
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[0024] The present invention will be further described below in conjunction with drawings and embodiments.
[0025] figure 1 The circulating fluidized bed boiler shown is divided into two parts by a special-shaped partition wall 1, that is, the furnace 2, 3, the boiler roof 11 is arranged on an upward slope, and each side of the boiler includes a cyclone separator, which passes through the separator inlet 9, 10 Connected with the boiler body, the number of separators on each side can be 2 or more.
[0026] The special-shaped partition wall 1 is arranged in the middle of the furnace along the vertical height direction, and an upper header 7 and a lower header 8 are respectively installed on the boiler roof 11 and the lower part of the furnace. The heat exchange tube sheets 4 constituting the special-shaped partition wall 1 are discontinuously arranged, and are composed of wing-shaped tube sheets 4A and webs 4B. The wing-shaped tube plate 4A and the web 4B are welded by at lea...
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The invention relates to a compact circulating fluidized bed boiler with a special division wall. The special division wall divides a hearth into two hearths, the special division wall comprises at least one group of heat exchange tube plates, each heat exchange tube prevents the division wall from being deformed and has the function of separating ash particles; the ash particles separated from a separation tank of the heat exchange tube plates downwards flow into a heat exchanger between the two hearths and returns to the hearths or are discharged out of the boiler after being exchanged heat with a heat exchange surface in the heat exchanger. The invention has the characteristics of compact structure, convenient modular design and amplification, and is suitable for the circulating fluidized bed boiler required to arrange the division wall or heat exchanger.
Description
technical field [0001] The invention relates to a circulating fluidized bed boiler, in particular to a compact circulating fluidized bed boiler with a special-shaped partition wall. Background technique [0002] Circulating fluidized bed boilers are widely used in the power industry due to their technical characteristics such as wide fuel adaptability, large load regulation ratio, high efficiency and low pollution. However, with the increase of circulating fluidized bed boiler capacity, there are technical problems such as limited furnace space, insufficient heating surface layout and serious wear of the furnace panel heating surface. The heat circulation loop is arranged with an external heat exchanger, which transfers part of the heat carried by the circulating ash to the external heat exchanger. By adjusting the ratio of the circulating material volume between the feeder and the external heat exchanger, the combustion temperature in the furnace can be controlled. And adj...
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Login to View More IPC IPC(8): F23C10/00F23C10/18
Inventor 孙献斌黄中时正海
Owner XIAN THERMAL POWER RES INST CO LTD