Sulfur-melting technology by coke oven gas and device therefor

Abstract

The invention provides a sulfur-melting process by coke oven gas and device, wherein the process comprises the steps of, (1) heating the sulfur foam to 25-150 deg. C in the heat transfer section of the sulfur-melting still, (2) loading the heated sulfur foam into temperature holding segment of the sulfur-melting still through the external honeycomb duct, distributor, contacting and mixing with 50-200 deg. C molten sulfur, (3) raising the non-molten sulfur foam suspending in the water phase to cross the heating section along with the water phase, (4) entering the small sulfur droplets into separation section along with aqueous phase, (5) entering the aqueous phase into heat transfer section, cooling down to 50-60 deg. C and discharging.

Description

technical field [0001] The invention relates to a process and equipment for melting sulfur of coke oven gas, which is used for the desulfurization process of coke oven gas, and belongs to the technical field of chemical process methods and equipment. Background technique [0002] The current HPF desulfurization process of coke oven gas in domestic coking plants generally has the following problems: the clear liquid discharged from the continuous sulfur melting tank is unclear, which increases the suspended sulfur content in the desulfurization liquid, and the excess desulfurization liquid in the desulfurization system cannot be sent to the ammonia distillation tower. Ammonia distillation, which cannot be directly biochemically treated, let alone be discharged directly, has become a very prominent environmental protection problem for all coking enterprises using HPF desulfurization technology. [0003] Regarding the reasons why the clear liquid discharged from the sulfur melt...

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Problems solved by technology

[0002] The current HPF desulfurization process of coke oven gas in domestic coking plants generally has the following problems: the clear liquid discharged from the continuous sulfur melting tank is unclear, which increases the suspended sulfur content in the desulfurization liquid, and the excess desulfurization liquid in the desulfurization system cannot be sent to the ammonia distillation tower. Ammonia distillation, which cannot be directly biochemically treated, let alone be discharged directly, has become a very prominent environmental protection problem for all coking enterprises using HPF desulfurization technology

[0003] Regarding the reasons why the clear liquid discharged from the sulfur melting kettle is not clear, the preliminary analysis is based on the following aspects: the temperature of the sulfur foam entering the sulfur melting kettle is relatively low, and a part of the sulfur foam is not completely melted and polymerized and settled, so it is brought out by the separated water; The structure is unreasonable, the diameter of the upper part is small, the separation water rises faster, and the small particles of molten sulfur droplets are brought out; too many sets of sulfur melting kettles are not convenient for automatic control, and it is difficult to achieve continuous and stable operation, so that the molten sulfur is separated from the clear liquid The rising speed fluctuates, which cannot be stably controlled within a reasonable range, resulting in more sulfur droplets entrained in the separated clear liquid

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