Desulfurizing tower double-circulation wet filtering system for chemical production

Abstract

The invention provides a desulfurizing tower double-circulation wet filtering system for chemical production, which comprises an outer circulation tower and an inner circulation tower, wherein the inner circulation tower is arranged on the inner side of the outer circulation tower, the top of the inner circulation tower is communicated with the top of the outer circulation tower, the lower side of the side wall of the outer circulation tower is provided with a gas inlet pipeline with the tail end extending to the position right below the inner circulation tower structure, an atomization supporting plate and a rain curtain supporting plate are sequentially welded between the outer circulation tower and the inner circulation tower from top to bottom, a flue gas outlet is vertically formed in the inner side of the inner circulation tower, a spiral supporting plate is welded between the flue gas outlet and the inner wall of the inner circulation tower, an annular first-stage spraying pipe and an annular second-stage spraying pipe are arranged on the upper side of the atomization supporting plate and the upper side of the spiral supporting plate respectively, and the bottom of the outer circulation tower and the bottom of the inner circulation tower are respectively connected with a first-stage slurry outlet and a second-stage slurry outlet. According to the invention, the inner and outer double-circulation structures are arranged to be matched with different supporting plates at different positions, so that the effective contact between lime water slurry and flue gas is improved, the flue gas desulfurization effect is greatly improved, and the system has a good development prospect.

Description

technical field [0001] The invention relates to the field of industrial waste gas treatment, in particular to a desulfurization tower double-cycle wet filtration system for chemical production. Background technique [0002] With the improvement of social environmental protection awareness and the improvement of national laws and regulations, the control of pollutant discharge from facilities is becoming increasingly strict, and the SO emission value of industrial waste gas is required to be lower than 50mg / NM. The wet desulfurization process has high desulfurization efficiency (≥95%), With the advantages of good stability and low operating costs, it is widely used in the desulfurization treatment of ultra-low emission of flue gas in the domestic chemical industry. In the wet desulfurization process, the limestone-gypsum wet desulfurization process is the most common. This process uses limestone slurry as the absorbent , The limestone slurry is used to wash the flue gas in th...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a dual-circulation wet filtration system for desulfurization towers used in chemical production to solve the problem that the residence time of sintering flue gas in traditional desulfurization towers is too short and cannot fully contact with limestone-gypsum spray slurry, which affects desulfurization efficiency. The problem

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