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Insoluble sulfur extraction method and extraction system

A sulfur and extraction technology, applied in the field of insoluble sulfur continuous extraction system, can solve the problems of difficult to control product purity, long time, low extraction efficiency, etc.

Active Publication Date: 2020-07-07
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the extraction of crude insoluble sulfur generally has the problems of low extraction efficiency, long time and difficulty in controlling the purity of the product.

Method used

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  • Insoluble sulfur extraction method and extraction system

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Experimental program
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Effect test

Embodiment 1

[0046] Using carbon disulfide as the extraction agent, the sulfur crude product particles (3mm) enter the first-stage fluidized bed extraction tower, the flow rate of the fluidized section is 6m / s, and the extracted particles enter the solid phase after being separated by the first-stage cyclone separator. Grinding to 100 mesh in the liquid phase pulverizer, the pulverized crude sulfur product is further extracted and cleaned in the secondary fluidized bed extraction tower, the flow velocity of the fluidized section of the secondary fluidized bed extraction tower is 2m / s, and Liquid-solid separation in the first-stage cyclone separator, and then the insoluble sulfur product is obtained after being treated by the dryer and the gas-solid cyclone separator. The drying temperature is 65°C, and the condensation temperature of the dry gas is 35°C. The yield of the obtained insoluble sulfur product is 38%, and the mass fraction of insoluble sulfur is 91.5%.

Embodiment 2

[0048] With carbon disulfide as the extraction agent, the sulfur crude product particles (2mm) enter the first-stage fluidized bed extraction tower, the flow rate of the fluidized section is 5m / s, and the extracted particles enter the solid phase after being separated by the first-stage cyclone separator. Grinding to 200 mesh in the liquid phase pulverizer, the pulverized crude sulfur product is further extracted and cleaned in the secondary fluidized bed extraction tower, the flow velocity of the fluidized section of the secondary fluidized bed extraction tower is 1.5m / s, and in The liquid-solid separation in the secondary cyclone separator, and then the insoluble sulfur product is obtained after being treated by the dryer and the gas-solid cyclone separator. The drying temperature is 63°C, and the drying gas condensation temperature is 40°C. The yield of the obtained insoluble sulfur product is is 37%, and the mass fraction of insoluble sulfur is 92.1%.

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Abstract

The invention discloses an insoluble sulfur extraction method and an extraction system. The extraction system comprises a first-stage fluidized bed extraction tower, a first-stage cyclone separator, aliquid phase crusher, a second-stage fluidized bed extraction tower, a second-stage cyclone separator, a dryer, a gas-solid cyclone separator, a condensation separator and an extraction agent storagetank. The insoluble sulfur extraction system and the extraction method can improve the purity of the product, are high in thermal stability and product yield, are suitable for large-scale continuousproduction, and have the advantages of safety, reliability, low operation cost, remarkable energy-saving effect and the like.

Description

technical field [0001] The invention relates to the technical field of chemical equipment, in particular to an insoluble sulfur continuous extraction system. Background technique [0002] With the sharp increase in oil consumption, global oil resources are increasingly scarce, and the quality and inferiority of refinery raw materials are becoming more and more serious. At the same time, environmental protection regulations in various countries are becoming stricter, and the control of total sulfur content in petroleum products and natural gas is becoming more stringent. Therefore, the capacity of sulfur recovery units in major refineries and natural gas purification plants has increased rapidly. The domestic and foreign markets of this common sulfur have become saturated, so the price is low. How to provide high value-added sulfur products that are in short supply in the market has become the focus of relevant enterprises. [0003] Insoluble sulfur is a high-efficiency rub...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B17/12B01D11/02
CPCB01D11/0253B01D11/0284B01D11/0288B01D11/0292B01D11/0296C01B17/12
Inventor 方向晨廖昌建王海波孟凡飞朴勇
Owner CHINA PETROLEUM & CHEM CORP
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