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Preparation method and preparation system of insoluble sulfur

A preparation system, sulfur technology, applied in the direction of sulfur preparation/purification, etc., can solve the problems of complex operation process, poor thermal stability of insoluble sulfur, low yield, etc.

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

AI Technical Summary

Problems solved by technology

[0006] At present, the insoluble sulfur produced by the existing low-temperature melting method has poor thermal stability and low yield, and the continuous operation process of the system is complicated

Method used

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  • Preparation method and preparation system of insoluble sulfur
  • Preparation method and preparation system of insoluble sulfur
  • Preparation method and preparation system of insoluble sulfur

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Embodiment 1

[0089] 4 tons / hour of liquid sulfur 100 is preheated to 120°C and enters the polymerization kettle. The amount of initiator added to the polymerization kettle is 0.15wt% of the amount of liquid sulfur added. The sulfur is heated to 255°C through the jacket in the polymerization kettle for polymerization. And keep the temperature for 30 minutes; the polymerized sulfur is continuously fed in and out of the material under the action of the rake-type stirring paddle, and the discharge is pressurized by the gear pump, 60wt% of the material is discharged to the quenching device, and 40wt% of the material is returned to the hollow shaft of the rake-type stirring paddle with the Feed mix. After the liquid sulfur is polymerized, it is granulated and quenched in the quenching device. The granulation is 2 mm in diameter. , FeCl 3 Adding amount is 0.3% (mass fraction) of sulfur mass, HNO 3 The amount added is 2% (mass fraction) of the mass of sulfur. The quenched crude product is promo...

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Abstract

The invention discloses a preparation method and a preparation system of insoluble sulfur. The preparation system comprises a polymerization kettle, a quenching device and a drying and curing unit; adischarge port of the polymerization kettle is communicated with a feed port of the quenching device through a pipeline, and a discharge port of the quenching device is communicated with an inlet of the drying unit through a pipeline; the quenching device comprises a shell, and the interior of the shell comprises a feeding quenching section, a material conveying section and a discharging section in the material flowing direction; a feeding distributor and a quenching liquid distributor are arranged in the feeding quenching section, a plurality of layers of conveying belts are arranged in the material conveying section, fixed rotating shafts are arranged at the two ends of each layer of conveying belt, and a discharging device is arranged in the discharging section. The invention also provides an insoluble sulfur preparation method adopting the preparation system. According to the preparation method and the preparation system of the insoluble sulfur, continuous quenching and continuousextraction of the polymerized sulfur can be realized through continuous granulation, continuous conveying and continuous cyclic extraction of the extracting agent, such that the purity, the thermal stability and the yield of the product are ensured, and the preparation method and the preparation system are suitable for large-scale continuous production.

Description

technical field [0001] The invention belongs to the technical field of petrochemical industry, and relates to a preparation method and a preparation system of insoluble sulfur. 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 ...

Claims

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Application Information

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IPC IPC(8): C01B17/12
CPCC01B17/12
Inventor 王海波廖昌建孟凡飞朴勇
Owner CHINA PETROLEUM & CHEM CORP
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