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Hydrogen sulfide compression method and device for hydrotreating

A compression method and hydrotreating technology, which are applied in chemical instruments and methods, treatment with hydrogen-producing compounds, treatment of hydrocarbon oil, etc., can solve problems such as affecting compressor power, corrosion, and the inability of compressors to transport supercritical gas, etc. The effect of avoiding changes in gas composition and working conditions and avoiding corrosion

Active Publication Date: 2018-06-22
王荣超
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Each of the two approaches to the above scenario has a limiting factor
It is directly transported to the reaction system, and there is no problem with the low reaction pressure of hydroprocessing (such as hydrogenation of gasoline and diesel). When the reaction pressure is higher than 9Mpa, the hydrogen sulfide gas enters a supercritical state during the final stage compression, and the compressor cannot transport close to Supercritical gas with liquid density (if it is cooled, the gas will be liquefied into liquid immediately, and the compressor cannot transport the liquid); it is transported by means of a supplementary hydrogen compressor. Considering the factors containing hydrogen sulfide, there is no problem, but if the sulfur supplement scheme is implemented for the existing hydrogenation unit, hydrogen sulfide gas will still have a small amount of corrosion on the hydrogen supplement compressor, and the increase of gas density will affect the power of the existing compressor and other adverse effects

Method used

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  • Hydrogen sulfide compression method and device for hydrotreating
  • Hydrogen sulfide compression method and device for hydrotreating
  • Hydrogen sulfide compression method and device for hydrotreating

Examples

Experimental program
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Effect test

Embodiment 1

[0029] Example 1 pressurizes 0.2Mpa hydrogen sulfide-containing gas to 20Mpa.

[0030] Option 1 uses a diaphragm compressor, which is configured according to two-stage compression. The pressure ratio of each stage is calculated as 10, and the inlet pressure of the second stage is set as 0.2*10=2Mpa. According to the hydrogen sulfide saturated vapor pressure calculation formula, the liquefaction temperature at the secondary inlet pressure is 18.7°C, which is lower than the cooling temperature of the circulating water in the factory (40°C), so it will not liquefy during the primary compression until the secondary inlet. Now calculate the hydrogen distribution for the second stage compression:

[0031] The secondary outlet is usually cooled to normal temperature 40°C for transportation. According to the calculation formula of hydrogen sulfide saturated vapor pressure, its liquefaction partial pressure is 3.6Mpa, then the required hydrogen ratio is 20-3.6=16.4Mpa, and the ratio i...

Embodiment 2

[0035] Example 2 pressurizes 0.5Mpa hydrogen sulfide-containing gas to 32Mpa.

[0036] Option one chooses a diaphragm compressor, which is configured according to two-stage compression. The pressure ratio of each stage is calculated as 8, and the inlet pressure of the second stage is set at 4Mpa. According to the hydrogen sulfide saturated vapor pressure calculation formula, the secondary liquefaction temperature is 44.4°C, which is higher than the cooling temperature of the factory circulating water (40°C), so the primary compression will liquefy after cooling. Therefore, it is necessary to carry out hydrogen distribution at the primary inlet. The hydrogen ratio is calculated as follows:

[0037] The minimum ratio of hydrogen distribution at the primary inlet is: according to the calculation formula of hydrogen sulfide saturated vapor pressure, hydrogen sulfide is liquefied at a pressure of 3.6Mpa at 40°C, so the ratio of hydrogen gas is at least 0.4Mpa, that is, at least 1...

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Abstract

The invention discloses a hydrotreating hydrogen sulfide compression method and device. The industrial gas rich in hydrogen sulfide is used, a membrane compressor or a reciprocating compressor is newly arranged, hydrogen with different proportions is arranged in different positions of the compressor, and the gas and the hydrogen are compressed together to the high pressure part of hydrotreating, so that the hydrogen sulfide concentration of a high pressure system is maintained; hydrogen is arranged at a first level inlet and / or a second level inlet and / or a third level inlet and / or a fourth level inlet of the new compressor, so that the hydrogen sulfide gas is prevented from being liquefied during the compression process.

Description

Technical field [0001] The invention relates to hydrogen sulfide recovery and sulfur supplementation of a hydroprocessing unit. Specifically, the gas hydrogen sulfide is compressed and delivered to the reaction system of the hydroprocessing 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] When hydrotreating high-nitrogen and low-sulfur raw materials, the concentration of hydrogen sulfide in the circulating hydrogen system is too low, and the activity of the sulfide catalysts of cobalt, molybdenum...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J8/00B01J8/02B01J8/08B01J8/22C10G49/18C10G45/02C10G47/02C10G49/02C10G1/06C10G1/08
CPCB01J8/00B01J8/0278B01J8/085B01J8/1827B01J8/22B01J2208/00893B01J2208/02C10G1/06C10G1/08C10G1/086C10G45/02C10G47/02C10G49/02C10G49/18C10G2300/1037C10G2300/1074
Inventor 王荣超
Owner 王荣超