Hydrotreating sulfur supplementing method

A technology for hydrotreating and supplementing sulfur, which is used in the treatment of hydrogen-producing compounds, etc., to achieve the effects of multiple steps, alleviating corrosion problems, and saving investment and operating costs.

Active Publication Date: 2015-09-23
王荣超
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The four steps are described one by one below:

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  • Hydrotreating sulfur supplementing method
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Examples

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Embodiment 1

[0047] Example 1: Under the condition of heating the bottom of the stripping tower for sulfur-containing sewage, components such as hydrogen sulfide, water vapor, and methane in the sulfur-containing sewage flow out from the top of the tower to form hydrogen sulfide-containing gas. The gas enters the storage tank D2 filled with an acid gas-resistant molecular sieve desiccant, and after removing the water vapor therein, enters the hydrogen sulfide-containing gas condenser E2. On the other side of the condenser E2, the liquid propylene is heated and vaporized to form a low temperature of -47°C to realize the condensation and cooling of the gas containing hydrogen sulfide. (The refrigerant is not limited to propylene). After the propylene gas is vaporized, it can be pumped back by the screw compressor to be repressurized, cooled, expanded and cooled, and recycled (same as ordinary refrigeration, not described in detail). The gas containing hydrogen sulfide is condensed and coole...

Embodiment 2

[0050] Example 2: The sulfur-containing sewage stripping tower T strips hydrogen-sulfide-containing gas, enters the lower part of the storage tank D2 filled with phosphorus pentoxide, penetrates the phosphorus pentoxide bed from bottom to top, and removes water vapor therein After that, it flows out from the top of D2 to form dried hydrogen sulfide-containing gas. The gas is pressurized by the zero-leakage diaphragm compressor C, then cooled by the water cooler E2, and then enters the storage tank D3, hydrogen sulfide forms a liquid and enriches at the bottom of the storage tank, and non-condensable gas such as methane is enriched at the top of the storage tank and discharged . The liquid hydrogen sulfide at the bottom of the storage tank D3 is pressurized by a hydraulic diaphragm metering pump, and is directly transported to the inlet of the first reactor for hydrotreating.

[0051] The hydrogen sulfide gas circulation process of this sulfur replenishing method is briefly de...

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Abstract

The invention provides a sulfur supplement technology for hydrogenation treatment. The sulfur supplementing technology comprises the following steps: conducting steam stripping to sulfur-containing sewage, emitted by a factory, through a steam stripping tower, and / or drying or cooling hydrogen sulfide regenerated by a desulfuration amine liquid regeneration tower so as to remove water, then conducting compressional cooling or deep cooling to liquidify a hydrogen sulfide gas, and finally delivering the liquid hydrogen sulfide to a high-pressure system for hydrogenation treatment through a pump, so as to maintain the hydrogen sulfide concentration required by the catalyst of the system.

Description

Technical field [0001] The invention relates to sulfur supplementation of a hydrotreating unit, specifically, injecting hydrogen sulfide into the reaction system of the hydrotreating unit to keep the hydrogen sulfide content in the circulating hydrogen of the reaction system at a reasonable level. Background technique [0002] Hydroprocessing may include: hydrotreating of petroleum fractions, hydrocracking, hydrodecondensation, etc., and may also include fixed bed / suspended bed / Ebullated bed hydrotreating refers to a series of catalytic hydrogenation reactions that consume hydrogen, such as hydrodesulfurization, deoxygenation, denitrogenation, aromatics saturation, and hydrocracking in a broad sense. [0003] The general process of the reaction system of hydrotreating is that the raw material is mixed with circulating hydrogen, and after heat exchange and heating, it enters a reactor equipped with a catalyst to undergo a hydrogenation reaction. After the reaction, the produ...

Claims

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Application Information

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IPC IPC(8): C10G49/18
Inventor 王荣超
Owner 王荣超
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