一种电厂烟气超净湿法除尘系统

Flue gas ultra-clean wet dust collection system of power plant

Abstract

The invention discloses a flue gas ultra-clean wet dust collection system of a power plant. A scrubbing tower is communicated with a venturi scrubber connected with flue gas at the outlet of the tail part of a boiler; the bottom of the scrubbing tower is provided with a scrubbing tower circulation pump; the scrubbing tower circulation pump has two outlets, one outlet is connected with the venturi scrubber, and the other outlet is connected with a circulation water heat exchanger; an outlet of the circulation water heat exchanger is connected with a connector at the upper part of the scrubbing tower; an outlet at the top of the scrubbing tower is connected with a chimney; ash in flue gas from the tail part of the boiler is mainly removed by the venturi scrubber and the scrubbing tower; flue gas passes through the venturi scrubber, so that the ash content is soaked fully and then is removed by the scrubbing tower; ash water extracted from the lower middle part of the scrubbing tower is pressurized by a circulation pump of the scrubbing tower to act as scrubbing water of the venturi scrubber; in order to improve the removing efficiency of acid gas, an alkaline solution can be added into ash water which is introduced into the scrubbing tower; boiler feed water serving as fresh supplied water is added into the circulation solution of the tower. The system is simple in structure, is low in investment, and is high in dedusting efficiency.
一种电厂烟气超净湿法除尘系统,洗涤塔与文丘里洗涤器相连通,文丘里洗涤器连接锅炉尾部出口烟气,洗涤塔底部设有洗涤塔循环泵,洗涤塔循环泵出口分为两路,一路与文丘里洗涤器连接;一路与循环水换热器连接,循环水换热器的出口与洗涤塔的上部接口连接;洗涤塔顶部出口连接烟囱;来自锅炉的尾部烟气除灰主要依靠文丘里洗涤器和洗涤塔,烟气通过文丘里洗涤器,将灰分充分浸润后,通过洗涤塔除去,从洗涤塔中下部抽取的灰水,由洗涤塔循环泵加压作为文丘里洗涤器的洗涤水,在为改善酸性气体的脱除效率,在通入洗涤塔的灰水中可加入碱性溶液,锅炉给水作为新鲜补充水加至塔的循环溶液中,该系统结构简单、投资小,除灰效率高。

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