Slag cooler suitable for circulating fluidized bed boiler burning coal gangue and other low-grade fuels
A circulating fluidized bed and low-quality fuel technology, which is applied to fluidized bed combustion equipment, fuel burned in a molten state, and combustion methods, etc., can solve problems such as failure to utilize waste heat, unrecyclable boilers, and large boiler slag discharge
Active Publication Date: 2011-04-20
蒋卫东
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Problems solved by technology
Since the amount of cooling water cannot be more than the amount of water supplied to the boiler, and the water temperature cannot be higher than that of the deoxygenated water, in fluidized bed boilers burning coal gangue or other low-quality fuels, due to the large amount of boiler slag discharge, the required cooling water is much higher than that of the boiler. The cooling water that can actually be supplied has caused some manufacturers to replace cooling water with industrial water. The heated cooling water boiler cannot be recycled and put into the drain, which does not play the role of waste heat utilization
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[0011] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
[0012] see figure 1 with figure 2 , the body of the screw type slag feeder 1 is arranged in the high-pressure container 2, and the outer surface of the body of the screw type slag feeder 1 in the high-pressure container 2 is provided with a cooling fin 14, and the connection between the screw type slag feeder 1 and the high-pressure container 2 The connection adopts a sealed connection with expansion compensation. The feed port and discharge port of the screw feeder 1 are located outside the high-pressure container 2. The high-pressure container 2 is installed on the base 13. The upper part of the high-pressure container 2 passes through the communication pipe 4. A high-pressure exchange container 3 is connected, and a safety valve 7, an air release valve 8, and a pressure gauge 6 are arranged on the high-pressure exchange container 3; The u...
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The invention discloses a slag cooler suitable for a circulating fluidized bed boiler burning coal gangue and other low-grade fuels, wherein the body of a spiral slag feeding machine (1) is arranged in a high-pressure container (2); the charging hole and discharging hole of the spiral slag feeding machine (1) are arranged outside the high-pressure container (2); the upper part of the high-pressure container (2) is connected with a high-pressure exchange container (3) through a communicating pipe (4); the upper part of the inside of the high-pressure exchange container (3) is provided with a heat conduction tube bundle (5); the medium in the heat conduction tube bundle (5) is the boiler feed water of a boiler feed pump; and the discharging hole of the spiral slag feeding machine (1) is connected with a rotating drum slag cooler (12), and the cooling water of the rotating drum slag cooler (12) makes up water for the boiler. The slag cooler suitable for the circulating fluidized bed boiler burning coal gangue and other low-grade fuels disclosed by the invention completely uses the feed water of the boiler to cool slag, has small floor space, is convenient to repair and is practical.
Description
technical field [0001] The invention relates to a slag cooler for slag removal and slag waste heat utilization of a fluidized bed boiler, in particular to a slag cooler suitable for circulating fluidized bed boilers burning inferior fuels such as coal gangue. Background technique [0002] Various slag coolers for fluidized bed boilers that are popular in the market now use boiler make-up water or condensed water returned from steam turbines as the slag cooling and waste heat recovery medium, and the cooling water is heated and recycled to the deaerator. Since the amount of cooling water cannot be more than the amount of water supplied to the boiler, and the water temperature cannot be higher than that of the deoxygenated water, in fluidized bed boilers burning coal gangue or other low-quality fuels, due to the large amount of boiler slag discharge, the required cooling water is much higher than that of the boiler. The cooling water that can actually be supplied has caused so...
Claims
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Inventor 蒋卫东
Owner 蒋卫东