Coking desulfurization sulfur foam and desulfurization waste solution drying method

Abstract

The invention discloses a coking desulfurization sulfur foam and desulfurization waste solution drying method. The method comprises the following steps: (a) conveying the coking desulfurization sulfur foam and desulfurization waste solution to a drying tower by virtue of conveying equipment and drying; (b) drying the sulfur foam and desulfurization waste solution in the step (a) in the drying tower, collecting from the bottom of the drying tower, thereby obtaining coarse sulfur powder; (c) allowing the tail gas in the drying tower in the step (a) to enter a cyclone separator, and performing dust removal treatment; and (d) allowing the tail gas subjected to dust removal treatment in the step (c) to enter a spray tower, and cooling and washing. According to the method disclosed by the invention, the coking desulfurization sulfur foam and the desulfurization waste solution are simultaneously dried so as to obtain the salt-containing coarse sulfur powder, a novel way is provided for treatment and utilization of the desulfurization waste solution in the coking system, and secondary pollution is avoided. Moreover, the desulfurization waste solution can be timely and effectively treated, the salt-containing coarse sulfur powder obtained by the drying method disclosed by the invention cannot be agglomerated or damped, the granules are uniform, and preservation and transportation are easy.

Description

technical field [0001] The invention relates to a drying method for coking desulfurization, in particular to a drying method for coking desulfurization foam and desulfurization waste liquid. Background technique [0002] Coking gas desulfurization by-product sulfur foam drying belongs to the category of sulfur production, but the sulfur foam contains more impurities and generally needs to be purified. At present, there are several types of sulfur purification methods: ①melting method, which has problems such as low purity of recovered sulfur, low sulfur yield, high energy consumption, and high production cost; ②extraction method, using an extractant to dissolve sulfur in the material And adopt the method of solid-liquid separation to separate sulfur. Commonly used extractants include carbon disulfide, tetrachlorethylene, carbon tetrachloride, etc.; ③ sublimation method, that is, the principle of heating sulfur to the boiling point and then evaporating for purification. The...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a drying method for coking desulfurization foam and desulfurization waste liquid. This method can obtain salt-containing crude sulfur powder with no caking, no moisture absorption, and uniform particles, which is easy to store and transport, and is The treatment and utilization of desulfurization waste liquid provides a brand-new treatment method, and there is no waste liquid treatment problem, which successfully solves the problems of environmental pollution and high operating cost of the existing process

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