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Process and system for preparing acid by combining sulfur and exhaust gas obtained in viscose exhaust gas TRS (total reduced sulfur) recovery

A waste gas and sulfur technology, applied in the direction of sulfur compounds, inorganic chemistry, non-metallic elements, etc., to reduce production costs, reduce waste gas emissions, and facilitate production

Active Publication Date: 2019-02-15
宜宾海翔化工有限责任公司
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  • Summary
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Problems solved by technology

The invention makes up for the instability and high cost defects of the existing waste gas acid production system, and at the same time effectively utilizes the sulfur produced by the viscose waste gas TRS recovery technology, and solves the problem that the TRS sulfur contains more complex iron impurities and cannot The problems solved by conventional technology have realized the development of the company's circular economy technology

Method used

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  • Process and system for preparing acid by combining sulfur and exhaust gas obtained in viscose exhaust gas TRS (total reduced sulfur) recovery

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Embodiment Construction

[0042] The viscose waste gas is passed into the TRS reactor to generate a slurry rich in complexing agent and sulfur, which enters the primary separation tank through the discharge port below, and the slurry and supernatant are separated by static separation. The bottom sauce is pumped to the primary centrifuge for dehydration and separation through the slurry pump, and the clear liquid above the primary separation tank is recovered to the TRS reactor through the pump.

[0043] After dehydration by a centrifuge, the TRS sulfur enters the primary washing tank, adding clean water, and under the combined action of stirring, one-time washing is realized. The mixed slurry enters the secondary separation tank, and the slurry is separated from the supernatant by static separation. The sauce at the bottom is pumped to the secondary centrifuge for dehydration and separation. The clear liquid above the secondary separation tank is recovered to the primary separation tank through the pu...

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Abstract

The invention relates a process for preparing acid by combining sulfur and exhaust gas obtained in viscose exhaust gas TRS (total reduced sulfur) recovery. According to the process, the defects of theexisting exhaust gas acid preparation system that the stable operation is affected by the defect of a raw material post, and the cost is too high, are made up; meanwhile, sulfur produced by a viscoseexhaust gas TRS recovery technology is effectively utilized, the problem TRS cannot be processed by a conventional technology as the TRS contains more complex iron impurities is solved, therefore, the development of a circular economy technology of a company is achieved.

Description

technical field [0001] The invention relates to the field of sulfuric acid production, in particular to a process and system for recovering sulfur from viscose waste gas TRS and combined acid production with waste gas. Background technique [0002] At present, the mainstream sulfuric acid production processes in the international community include sulfuric acid production, waste gas (hydrogen sulfide) production of acid, pyrite production of acid, production of sulfuric acid from smelting flue gas, production of sulfuric acid from gypsum and phosphogypsum, etc. [0003] Our company built and put into operation the waste gas acid system in 2014, which is an environmental protection project. The current system mainly uses viscose waste gas (H 2 S) Incineration to produce sulfuric acid, the actual load of the system only accounts for 50% of the design load. [0004] In 2016, the company carried out the TRS recycling project of viscose waste gas, using complex iron additives to...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B17/765C01B17/74
CPCC01B17/74C01B17/765Y02P20/129
Inventor 尹继国于洋胡军
Owner 宜宾海翔化工有限责任公司
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