Upper sprinkling secondary refining gas purifying technology

Abstract

The upward spraying and secondary fined air purifying technology has two obvious features that the spraying pipe is installed in the lower part of the washing and absorbing unit to spray washing and absorbing liquid upwards to double the detention time of the washing and absorbing liquid and to produce the collision between the upward liquid drops and the falling liquid drops, further dispersing water, updating the liquid drop surface and raising washing and absorbing effect; and that large spraying holes of diameter over 5 mm is adopted to avoid jamming and large liquid drops are fined in the upper liquid drop fining structure to increase the air-liquid contact arean and raise the washing and absorbing efficiency. Thus, the present invention has high purifying efficiency, high reliability and low power consumption.

Description

technical field [0001] The invention relates to an upper spray secondary refinement gas purification technology. It is widely used in the washing and absorption process of various industrial gases and the dust removal and purification of exhaust gas treatment, and can also be widely used in the dust removal and purification of cooking fume exhaust gas in the catering industry. Background technique [0002] In industrial production, especially in chemical production, there are quite a lot of spray scrubbing gas absorption and dedusting devices. The washing and absorbing liquid of the spray gas scrubbing, absorbing and dedusting equipment in the traditional structure is sprayed downward from the upper part of the device. There are three basic problems in this traditional structure: first, in order to prevent the clogging of the spray hole, the droplets flow from the spray The initial velocity sprayed from the shower hole must not be lower than a certain value. The liquid drop...

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Problems solved by technology

The washing and absorbing liquid of the spray gas scrubbing, absorbing and dedusting equipment in the traditional structure is sprayed downward from the upper part of the device. There are three basic problems in this traditional structure: first, in order to prevent the clogging of the spray hole, the droplets flow from the spray The initial velocity sprayed from the shower hole must not be lower than a certain value. The liquid droplets sprayed downward at a certain initial velocity move with the acceleration of gravity, and the washing and absorption time staying in the device is short, and the greater the initial velocity of the spray, the longer the staying time. The shorter the time, the worse the effect of washing and absorption; second, the greater the dispersion of the washing and absorbing liquid, the higher the washing and absorbing efficiency, which requires small spray holes, fine droplets, and large surface area, but the spray holes The smaller it is, the easier it is to block; third, during the washing and absorption process, the mass transfer between the components on the surface of the sprayed droplet and the components inside the droplet mainly depends on diffusion, which restricts the improvement of washing and absorption efficiency.

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