Air-actuated overflow wind-water combined slag-cooling machine

Abstract

The invention relates to a pneumatic, overflow, wind and water combined slag cooler, comprising a case body, which is characterized in that a hot blast outlet is arranged on the case body top; an air compartment is arranged on the lower part of the case body; an air inlet pipe is arranged on the air compartment; a cooling water pipe group is arranged on the inner cavity of the case body and an inclining gas channel is arranged under the inner cavity of the case body; a slag filling mouth and an accident slag discharge mouth are arranged on the case body which is over the low end of the inclining gas channel; a slag discharge port is arranged on the case body which is over the high end of the inclining gas channel. The cooling time is longer and the cooling effect is best. The air inlet pipe arranged on the air compartment is connected with an air outlet, which is used for feeding the surplus hot wind from the first order fan and the second order fan of the boiler, thus, the boiler thermal efficiency can be increased by 0.3 to 4%. A fly ash separator is arranged near the hot blast outlet over the inner cavity of the case body. A plurality of inverted cone holes are arranged on the bottom plate of the inclining gas channel, the center line of the inverted cone holes is inclined to the high end direction of the inclining gas channel, the included angle of the center line of the inverted cone holes and the bottom plate of the inclining gas channel is 75 degrees to 88 degrees, thus, the cooling effect for the hot slag is greatly improved.

Description

Technical field: [0001] The invention relates to a cooling device for cooling granular materials, in particular to a slag cooler suitable for cooling the slag of a circulating fluidized bed boiler and capable of cooling the slag temperature from about 900°C to 120°C±50°C. Background technique: [0002] The normal operation of the circulating fluidized bed boiler must ensure that the slag is discharged in time. If it cannot be discharged in time, it will not only waste energy, but also deteriorate the on-site operating conditions, and the residual sulfur and nitrogen in the ash can still release sulfur dioxide outside the furnace. and nitrogen oxides, which will pollute the environment and cause coking accidents. Therefore, solving the above problems and recovering the waste heat of the furnace bottom slag has become an important problem that must be solved for the normal operation of circulating fluidized bed boilers. The existing slag cooling machine used for slag cooling o...

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Problems solved by technology

Although this invention patent application has improved the cooling effect on circulating fluidized bed boiler slag, but due to the short residence time of hot slag in the air tank type slag cooler, the cooling effect on hot slag is not ideal, and the thermal efficiency is not high enough

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