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Treatment method of sulfur-containing slurry

A treatment method and slurry technology, applied in sludge treatment, water/sludge/sewage treatment, water/sewage treatment, etc., can solve the problems of large demand for chemicals, secondary pollution, and high cost, and improve process economy. High performance, high removal rate and simple operation

Inactive Publication Date: 2017-04-26
天津海威欧能源科技有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] At present, the treatment methods of sulfur-containing wastes used at home and abroad include oxidation method, steam stripping method, chemical flocculation method, biochemical method, etc., but the single use of a certain method still has high energy consumption, large demand for chemicals, and reprocessing of end products. Disposal and other issues, so the cost is high, and it is easy to cause secondary pollution

Method used

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  • Treatment method of sulfur-containing slurry

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] A method for treating sulfur-containing mud, the steps are as follows:

[0043] (1) 50g of sulfur-containing mud produced by adopting pesticide intermediates (wherein the mass fraction of each component is about: water 46%; sodium chloride 27%; sodium thiosulfate 7%; sulfur 13%; organic matter 7%), and 10g The hydrochloric acid solution (10wt%) was mixed and transported into the reactor B to react at normal temperature and pressure, the stirring speed was 500r / min, and the residence time was 10min.

[0044] (2) The gas generated by the reaction is exported into the lye absorber A and absorbed by saturated calcium hydroxide solution at a rate of 30L / h at normal temperature and pressure to remove sulfur dioxide and carbon dioxide gas. The content of sulfur dioxide in the gas phase after absorption meets the environmental protection emission requirements.

[0045] (3) After the reaction, the solid-liquid mixture obtained enters the filter C for normal pressure filtration a...

Embodiment 2

[0048] A method for treating sulfur-containing mud, the steps are as follows:

[0049] (1) 50g of sulfur-containing mud obtained in the production process (wherein the mass fraction of each component is about: water 45%; sodium chloride 23%; sodium thiosulfate 15%; sulfur 10%; organic matter 8%), and 50g hydrochloric acid solution (5wt%) was mixed and transported to reactor B to react at normal temperature and pressure, the stirring speed was 800r / min, and the residence time was 5min.

[0050] (2) The gas generated by the reaction is exported into the lye absorber A and absorbed at normal temperature and pressure using 2wt% sodium hydroxide solution at a dosage of 30L / h to remove sulfur dioxide and carbon dioxide gas. The content of sulfur dioxide in the gas phase after absorption meets environmental protection emission requirements.

[0051] (3) After the reaction, the solid-liquid mixture obtained enters the filter C for normal pressure filtration and separation, and the cru...

Embodiment 3

[0054] (1) 50g of sulfur-containing mud produced by adopting pesticide intermediates (wherein the mass fraction of each component is about: water 46%; sodium chloride 27%; sodium thiosulfate 7%; sulfur 13%; organic matter 7%), and 40g The hydrochloric acid solution (3wt%) was mixed and transported into the reactor B to react at normal temperature and pressure, the stirring speed was 600r / min, and the residence time was 10min.

[0055] (2) The gas generated by the reaction is exported into the lye absorber A and absorbed by saturated calcium hydroxide solution at a rate of 30L / h at normal temperature and pressure to remove sulfur dioxide and carbon dioxide gas. The content of sulfur dioxide in the gas phase after absorption meets the environmental protection emission requirements.

[0056] (3) After the reaction, the solid-liquid mixture obtained enters the filter C for normal pressure filtration and separation, and the crude sulfur product is recovered, wherein the sulfur content...

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Abstract

The invention provides a treatment method of sulfur-containing slurry. In the method, the slurry is treated in a manner of adding acid to carry out a reaction, so that sulfur-containing substances in the slurry are completely converted. Through filtration and evaporative crystallization, the sulfur, as well as by-products, is recovered. The treatment method includes the operations of reaction, absorption, filtration, evaporative crystallization and liquid-solid separation. The treatment method has low cost and high efficient, is environment-friendly and saves energy, and can achieve recovery of the sulfur and the by-products, thereby satisfying environment protection and increasing economic benefit.

Description

technical field [0001] The invention belongs to the field of chemical separation and environmental engineering, and relates to a separation system and method for solid-liquid separation of sulfur-containing mud and recovery of sulfur therefrom, specifically involving the use of absorption, reaction, filtration, evaporation and crystallization to achieve the separation goal. [0002] technical background [0003] Sulfur is an important chemical product and basic industrial raw material. It has a wide range of uses, including chemical industry, light industry, steel pickling, pharmaceutical and food industry, catalyst, pigment, sulfur mortar and concrete, black gunpowder and other industrial fields. At the same time, as an important variety of inorganic pesticides, sulfur is a multifunctional agent used to prevent and control plant diseases and insect pests. In addition to its bactericidal effect, it can also kill mites and insects. It is safe for humans and animals and is not e...

Claims

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Application Information

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IPC IPC(8): C02F11/00C02F1/04C01B17/02C02F103/34
CPCC02F11/00C01B17/02C02F1/048C02F2001/5218C02F2103/34
Inventor 程婧李研张庭云
Owner 天津海威欧能源科技有限责任公司
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