Technique and equipment for preparing sulfuric acid by using sulfur and waste liquid generated from coal gas wet type oxidation sweetening technique

A wet oxidative desulfurization and process technology, which is applied in inorganic chemistry, sulfur compounds, chemical instruments and methods, etc., can solve the problems of no treatment process for waste liquid, low sulfur purity, and difficulty in sales, so as to protect the environment and achieve resource recycling. , Low operating cost, good environmental protection effect

Active Publication Date: 2007-12-26
ACRE COKING & REFRACTORY ENG CONSULTING CORP DALIAN MCC
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Problems solved by technology

But on the whole, the process is still not perfect: first, the product sulfur produced after desulfurization has low purity and poor quality, making it difficult to sell; second, the waste liquid generated during the desulfurization process has not been properly treated, and the waste liquid is discharged caused new environmental pollution
The above two points restrict the application and development of this desulfurization process technology, which needs to be solved and improved urgently

Method used

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  • Technique and equipment for preparing sulfuric acid by using sulfur and waste liquid generated from coal gas wet type oxidation sweetening technique
  • Technique and equipment for preparing sulfuric acid by using sulfur and waste liquid generated from coal gas wet type oxidation sweetening technique
  • Technique and equipment for preparing sulfuric acid by using sulfur and waste liquid generated from coal gas wet type oxidation sweetening technique

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Embodiment Construction

[0056] The specific implementation of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0057] As shown in Fig. 1, according to a kind of process of the present invention using the sulfur and waste liquid that the coal gas wet oxidative desulfurization process produces sulfuric acid, comprise waste liquid incineration, waste heat recovery, dry type purification, contact conversion, acid gas condensation, its It is characterized in that sulfur and waste liquid produced after wet oxidation desulfurization of coal gas are used as raw materials. The main component of waste liquid is a salt solution containing sulfur element. After incineration, waste heat recovery, dry purification, wet contact conversion and acid gas condensation Production process of sulfuric acid:

[0058] 1) Incineration process: the raw material sulfur slurry mixed with sulfur and a salt solution containing sulfur is sent to the combustion furnace 9 of th...

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Abstract

This invention relates to method and apparatus for preparing sulfuric acid by using sulfur and waste solution generated in wet oxidation desulfurization of coal gas. The method comprises: mixing sulfur and sulfur-containing salt solution, incinerating wastewater, recovering waste heat, dry-cleaning, wet-contact-converting, and condensing. The apparatus comprises: an incineration unit, a waste heat recovery unit, a dry-type purification unit, a wet-type contact conversion unit, and a condensation unit, while does not comprise drying unit or tail gas treatment unit. Only one dry-type high-temperature purification deduster is used for dry purification, thus the purification process is simplified. The method has low cost, and no waste solution discharge.

Description

technical field [0001] The invention relates to the technical field of coal gas desulfurization and preparation of sulfuric acid, in particular to a process and equipment for preparing sulfuric acid from sulfur and waste liquid generated by a coal gas wet oxidation desulfurization process. Background technique [0002] Hydrogen sulfide contained in gas is a harmful substance. When undesulfurized gas is used for steelmaking and civil use, it will not only reduce the quality of steel, but also the sulfur dioxide produced by combustion will damage the environment and affect human health. Therefore, in order to meet the needs of the metallurgical industry and reduce the pollution to the atmosphere after gas combustion, it is necessary to remove the hydrogen sulfide in the gas. [0003] The wet oxidation desulfurization process represented by HPF, PDS, ZL and other quinone-cobalt-iron composite catalysts is a new coal gas desulfurization process developed by my country's coking ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10K1/08C01B17/74
CPCY02P20/129
Inventor 王英丽白玮戴成武蔡承祐陈惠民吕成张爽马增礼于涛
Owner ACRE COKING & REFRACTORY ENG CONSULTING CORP DALIAN MCC
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