Wind and water combined slag cooler for fluidized bed

Abstract

The invention provides a wind and water combined slag cooler for a fluidized bed. The wind and water combined slag cooler is mainly used as a bottom slag cooling and discharging device for a boiler ofa circulating fluidized bed. Coking and slag blocking phenomena of the slag cooler for the fluidized bed are eliminated, the operation of the wind and water combined slag cooler is not limited by theparticle size of bottom slag, and slag inlet and outlet control is simple and convenient. First, a material discharge opening or an accident slag discharge opening is not formed in a slag inlet high-temperature area of the slag cooler in any forms, a whole wind-distribution plate is complete and uniform from a slag inlet to a slag outlet, and only one slag outlet is formed to prevent the coking phenomenon due to a bad fluidizing effect of the high-temperature area; second, wind caps are arranged in a crossed manner in the wind-distribution plate, small holes in the wind caps are inclined downwards by a certain angle, and the diameters of the small holes of the wind caps are 6-8 mm; third, the interior of the slag cooler is a complete cavity, and is not divided by a partition wall; fourth,wind control is adopted in the aspect of slag inlet control, and a slag inlet pipe section connected with the slag cooler forms an inclined angle of 14-25 degrees with the horizontal plane; and fifth, a water-cooled wall is prevented from being worn by a wear-resistant sheet, and spraying is performed on scenes to resist wear.

Description

[0001] a technical field [0002] The invention relates to a slag cooling and discharging device, which is mainly used as bottom slag cooling and discharging equipment of a circulating fluidized bed boiler. At the same time, it is suitable for the cooling of granular materials in energy, chemical, pharmaceutical, food, light industry, mining and metallurgy and other industrial sectors, and also suitable for powdery and granular materials in chemical, pharmaceutical, food, dehydrated vegetables, grain, minerals and other industries. drying and sorting. [0003] Two background technology [0004] my country's circulating fluidized bed boiler power generation started in 1996 and entered the supercritical era in 2013. Due to its advantages in comprehensive utilization of resources, circulating fluidized bed boilers have replaced pulverized coal boilers and become a trend in the thermal power generation industry. However, it is difficult to increase the boiler capacity due to the ...

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Problems solved by technology

[0007] In order to overcome the phenomenon of coking, slag blockage and deformation of the heating surface of the fluidized bed air-water slag cooler, and at the same time overcome the small slag output of the drum slag cooler, the high slag discharge temperature, the serious environmental protection problems of the ash and slag leakage site, and other forms of cold slag The present invention provides a novel fluidized bed wind-water combined slag cooler, which eliminates the phenomenon of coking and slag blocking, is not limited by the particle size of the bottom slag, and is easy to control the slag in and out, and can achieve large output (above 40T / H ) continuous and stable operation

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