Technology and device for separating and melting sulfur

Abstract

The invention relates to a technology and device for separating and melting sulfur, and belongs to the technical field of separating and melting of chemical industry production. The technology in the technical scheme includes the steps that after a desulfurizing solution is subjected to regeneration and discharged out of a regeneration trough with sulfur foam, the desulfurizing solution and the sulfur foam are separated through a desulfurizing pressure filter, and separated clear liquid is directly fed to a system to be recycled through a desulfurizing pump; the separated sulfur foam is circularly stirred through a solution from a sulfur melting kettle to enter the sulfur melting kettle for sulfur melting, and a solution for sulfur melting and a solution for the production system are thoroughly separated. According to the technology and device, the content of solid matter of the clear liquid obtained after filtering of the desulfurizing pressure filter is lower than 60 ppm, stable production of the system is facilitated after the clear liquid is fed back to the production system, filtered-out sulfur paste is re-mixed to enter the sulfur melting kettle, energy consumption is saved, and compared with the traditional technology, energy consumption is reduced by 85% or above; the working environment is clean and free of pollution; the device is simple and convenient to install and maintain; the automatic degree of the system is high, the labor intensity is low, labor cost is saved, and continuous and stable operation of the system is facilitated.

Description

technical field [0001] The invention relates to a process and equipment for separating molten sulfur, belonging to the technical field of chemical production separation and smelting. Background technique [0002] At present, the sulfur melting process of the desulfurization system in chemical fertilizer production is mostly continuous sulfur melting technology. The sulfur melting process is as follows: a solution with a water content of more than 90% is floated through the desulfurization regeneration tank, and the foam overflowing from the regeneration tank enters the foam tank. The foam is pumped to the sulfur melting kettle for continuous sulfur melting. In this way, all the desulfurization liquid flowing out with the foam must pass through the high temperature of the sulfur melting tank. The high temperature desulfurization liquid produces a large amount of secondary salt, and the content of secondary salt in the desulfurization liquid is high, which seriously affects th...

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Problems solved by technology

In this way, all the desulfurization liquid flowing out with the foam must pass through the high temperature of the sulfur melting tank. The high temperature desulfurization liquid produces a large amount of secondary salt, and the content of secondary salt in the desulfurization liquid is high, which seriously affects the desulfurization efficiency of the desulfurization system and causes the production cost of the desulfurization post to increase. High, the high content of hydrogen sulfide after desulfurization will cause corrosion to the pipelines and equipment of the subsequent system, increase the load of the desulfurization station, and seriously affect the service life of the desulfurization station, liquid carbon dioxide post dry desulfurizer, and methanol post methanol catalyst, indirectly Increased chemical production costs

At the same time, due to the large amount of water in the sulfur foam, it is necessary to evaporate the water before the sulfur can be precipitated during the sulfur melting process, which will increase the steam consumption in the sulfur melting process and increase the cost of sulfur melting

[0003] Some use automatic desulfurization liquid recovery devices to solve the problem of desulfurization liquid degeneration caused by heating double salt, for example, China Patent No. 200720028602.3, add desulfurization liquid filtration system and desulfurization liquid automatic recovery system, filter sulfur foam, and filter out desulfurization liquid Recycling, the separated sulfur-containing solids are diluted and sent to the sulfur melting tank; the purpose is to solve the problem of low desulfurization efficiency of the desulfurization system due to the deterioration of the desulfurization liquid in the foam caused by heating

However, in order to ensure that the sulfur-containing solids can be transported to the sulfur melting kettle, a large amount of clear water or other liquids must be added to configure a new sulfur foam. In order to ensure the normal operation of the foam delivery device, the content of sulfur-containing solids in the foam must be maintained at If it is less than 10%, it still needs to consume a lot of heat energy to heat the liquid in the sulfur foam, and the clear liquid discharged from the sulfur melting tank can only be recycled to the desulfurization system, which can reduce the amount of some double salts produced, but the energy consumption is still high

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