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Refinery rich gas pretreatment method and dry gas and/or liquefied gas desulfurization method

A liquefied gas and pretreatment technology, which is applied in the field of desulfurization of rich gas, dry gas and liquefied petroleum gas in refineries, and can solve the problems of rapid catalyst deactivation and difficult handling of sulfur

Active Publication Date: 2019-12-31
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The conventional method of catalytic oxidation of mercaptans to treat refinery-rich gas has problems such as rapid deactivation of the catalyst due to high concentration of acid gas (hydrogen sulfide), and difficulty in handling the generated sulfur.

Method used

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  • Refinery rich gas pretreatment method and dry gas and/or liquefied gas desulfurization method
  • Refinery rich gas pretreatment method and dry gas and/or liquefied gas desulfurization method
  • Refinery rich gas pretreatment method and dry gas and/or liquefied gas desulfurization method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] Embodiment 1 The properties of gas-rich raw materials in refinery and the preparation of purification agent

[0063] There are two types of refinery rich gas to be processed, one is refinery rich gas from catalytic cracking process of a Sinopec refinery, called refinery rich gas 1, and the other is refinery rich gas from delayed coking process of the same refinery Gas, known as refinery rich gas 2. The components and contents of these two refinery rich gases are shown in Table 1-1.

[0064] Table 1-1 Components and contents of refinery rich gas mg / m 3

[0065] components Refinery rich gas 1 Refinery Rich Gas 2 oxygen 0.0180v％ 0.0252v％ hydrogen sulfide 1129.3 >5％ carbonyl sulfide 8.5 78.9 Methyl mercaptan 302.9 4163.2 ethanethiol 3.1 5.4 other sulfur 2.4 8.7 Organic sulfur content 316.9 4256.2 other components margin margin

[0066] The preparation method of the liquid purifying agent comprises...

Embodiment 2

[0080] The evaluation method of embodiment 2 scavenger

[0081] For the liquid purifying agent, keep the temperature of the liquid purifying agent at 40°C, pass the enriched gas from the refinery through the distributor and the liquid purifying agent to realize gas-liquid mixing, and control the ventilation speed through the valve under the condition of airtight normal pressure, set The volumetric space velocity of the gas passing through the liquid purifier is 95h -1; For the solid purifying agent, the solid purifying agent is set on the reactor bed, the rich gas from the refinery is directly passed through the reactor bed, and the volume space velocity of the gas passing through the reactor bed is set to be 150h -1 . A compressor is used to compress the rich refinery gas after contacting with the purifying agent to 1.2MPa.

[0082] For the refinery-rich gas that has been in contact with the purifier, under 40°C, 1.2MPa and anaerobic conditions, it is fully contacted with s...

Embodiment 3

[0088] Example 3 Influence of Refinery Rich Gas Purification Treatment on Dry Gas Desulfurization Effect

[0089] Table 3-1 and Table 3-2 respectively list the properties of sulfides in the refined dry gas after the refinery rich gas 1 and refinery rich gas 2 are treated with the liquid purifier in Table 1-2, among which It includes the properties of sulfides in the refined dry gas directly prepared from the rich gas of the refinery without purification treatment, and the sulfides in the refined dry gas prepared from the rich gas of the refinery after being treated with the ordinary mercaptan oxidation catalyst Q.

[0090] Table 3-3 and Table 3-4 respectively list the sulfide properties of the refined liquefied gas obtained after the solid purification agent in Table 1-3 treats refinery rich gas 1 and refinery rich gas 2. It includes the sulfides in the refined dry gas directly prepared from the rich gas of the refinery without purification treatment, and the sulfides in the r...

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Abstract

The invention provides a refinery rich gas pretreatment method and a dry gas and / or liquefied petroleum gas desulfurization method. The refinery rich gas pretreatment method comprises the step of contacting the refinery rich gas with a purifying agent. The refinery rich gas pretreatment method can reduce the desulfurization load of downstream products including dry gas and liquefied gas of the refinery rich gas, reduce the environmental protection pressure of desulfurization of the dry gas and the liquefied gas and improve the desulfurization depth of the dry gas and the liquefied gas, and particularly can break through the limit of the prior art of desulfurization of the liquefied gas. The dry gas and / or liquefied gas desulfurization method can be used to carry out deep desulfurization onthe dry gas and / or liquefied gas in order to obtain dry gas and / or liquefied gas with an extremely low sulfur content.

Description

technical field [0001] The invention relates to the petrochemical field, in particular to a desulfurization method suitable for rich gas, dry gas and liquefied petroleum gas in refineries. Background technique [0002] Refinery-rich gas is a collection of small molecule hydrocarbons and non-hydrocarbons, of which hydrocarbons are mainly C 1 -C 5 Alkanes and alkenes, non-hydrocarbons include sulfur-free substances such as hydrogen, nitrogen, carbon dioxide and sulfur-containing compounds such as carbonyl sulfide, hydrogen sulfide, mercaptan, carbon disulfide, dimethyl sulfide, etc. Mainly hydrogen and methyl mercaptan, hydrogen sulfide accounts for about 85% of the sulfides, followed by methyl mercaptan, accounting for about 10%, other sulfides generally do not exceed 10% of the total sulfur . The boiling point of sulfide in the rich gas of the refinery is mostly between -60°C (carbonyl sulfide) and 40°C (6.5°C for methyl mercaptan, 36.2°C for ethanethiol). [0003] Refin...

Claims

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Application Information

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IPC IPC(8): C10L3/00C10L3/10C10L3/12B01D53/48B01D53/52B01D53/86
CPCB01D53/485B01D53/52B01D53/8606B01D53/8612C10L3/00C10L3/103C10L3/12
Inventor 吴明清李涛常春艳伏朝林潘光成陶志平赵丽萍赵杰黄燕民
Owner CHINA PETROLEUM & CHEM CORP
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