Desublimation and purification system for desulfurized sulfur paste and operation method of desublimation and purification system

Abstract

A cooling gas source is connected with a gas inlet pipe opening of an electric hot blast stove through a gas inlet pipeline of a blast stove and a centrifugal fan, and an outlet of the electric hot blast stove is connected with a solid-gas separator through a gas supply pipeline of the blast stove. The solid-gas separator is connected with the multi-stage bag-type dust collector through a dusty gas pipeline, another centrifugal fan is arranged on the dusty gas pipeline, an outlet of the multi-stage bag-type dust collector is connected with a first-stage condenser through a purified gas pipeline, the lower part of the first-stage condenser is connected with an intermediate tank through a descending pipeline, and the lower part of the intermediate tank is connected with a second-stage condenser through a descending pipeline. The secondary condenser is connected with the primary condenser through a gas guide pipeline, the secondary condenser is connected with the intermediate tank through a sulfur liquid inlet pipeline, and the intermediate tank is simultaneously connected with the solid-gas separator. And the sulfur paste is heated by nitrogen to directly sublimate, so that the risk of blocking equipment caused by a liquid sulfur paste mixture is avoided, and the energy loss is reduced.

Description

technical field [0001] The invention belongs to the technical field of recycling and utilization of desulfurization by-products, and in particular relates to a desublimation purification system and an operation method for desulfurization paste. Background technique [0002] Many coal chemical plants (chemical fertilizers, coking, new coal chemical plants, etc.) and non-ferrous smelters in China all have a by-product after desulfurization - sulfur paste. Due to the complex impurities in the sulfur paste, it cannot be directly used in subsequent production and is accumulated in large quantities. It is very easy to cause serious pollution to the environment during the stacking process. [0003] Under the condition that the state has increased its efforts to control the atmosphere, with the promulgation of the state's "New Environmental Protection Law", it is mandatory to control the desulfurization paste produced by the gas desulfurization facilities of all coal chemical enterp...

AI Technical Summary

Problems solved by technology

The above-mentioned process engineering uses the sulfur paste to be prepared from solid-liquid-gas. The presence of the molten sulfur paste mixture (with tar substances present, which will cause adhesion) often leads to blockage and scaling of the equipment, which seriously threatens the equipment. Service life; In addition, steam or heat transfer oil is generally used for heating sulfur paste, and it requires relatively large energy consumption, many types of equipment, and large cost investment

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