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Device and method for producing sodium bisulfide by utilizing refinery dry gas

A technology of sodium hydrosulfide, refinery dry gas, applied in chemical instruments and methods, sulfur compounds, inorganic chemistry, etc., can solve the problems of operator health damage, poor operation safety, harsh production environment, etc., and achieve comprehensive resource utilization. The effect of utilization, no secondary pollution, and efficient resource utilization

Active Publication Date: 2014-04-30
CHINA CONSTR IND & ENERGY ENG GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The process is complicated, the production environment is harsh, and the operation safety is poor, leaving major hidden dangers to environmental pollution and health damage to operators.

Method used

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  • Device and method for producing sodium bisulfide by utilizing refinery dry gas

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The dry gas of a refinery is characterized by CH 4 17.82%, C 2 h 6 9.35%, C 2 h 4 8.04%, C 3 h 8 0.52%, C 3 h 6 1.20%, H 2 47.44%, H 2 S is 0.69%, CO 2 0.80% for air and 14.14% for others.

[0029] The dry gas raw material enters the first supergravity machine 1, and contacts with the amine absorbent methyldiethanolamine entering from the upper liquid inlet of the first supergravity machine 1, and the refined dry gas enters the gas pipe from the top of the first supergravity machine The liquid at the bottom of the first supergravity machine 1 enters the first absorbent regeneration tower 3 for absorbent regeneration. The operating pressure in the first supergravity machine is controlled at 1.0MPa, the operating temperature is controlled at 25°C, and the gas is The residence time in the first supergravity machine is 0.5min; after the liquid at the bottom of the first supergravity machine 1 enters the first absorbent regeneration tower 3, the temperature rises ...

Embodiment 2

[0031] The dry gas of a refinery is characterized by CH 4 25.79%, C 2 h 6 10.32%, C 2 h 4 10.04%, C 3 h 8 0.65%, C 3 h 6 1.08%, H 2 32.80%, H 2 S is 0.30%, CO 2 0.20% for air and 18.82% for others.

[0032] The dry gas raw material enters the first supergravity machine 1, and contacts with the amine absorbent methyldiethanolamine entering from the upper liquid inlet of the first supergravity machine 1, and the refined dry gas enters the gas pipe from the top of the first supergravity machine The liquid at the bottom of the first supergravity machine 1 enters the first absorbent regeneration tower 3 for absorbent regeneration. The operating pressure in the first supergravity machine is controlled at 1.2MPa, the operating temperature is controlled at 25°C, and the gas is The residence time in the first supergravity machine is 0.5min; after the liquid at the bottom of the first supergravity machine 1 enters the first absorbent regeneration tower 3, the temperature rise...

Embodiment 3

[0034] The dry gas of a refinery is characterized by CH 4 25.85%, C 2 h 6 11.52%, C 2 h 4 12.44%, C 3 h 8 1.45%, C 3 h 6 1.46%, H 2 31.86%, H 2 S is 0.10%, CO 2 2.86% for air and 12.46% for others.

[0035] The dry gas raw material enters the first supergravity machine 1, and contacts with the amine absorbent methyldiethanolamine entering from the upper liquid inlet of the first supergravity machine 1, and the refined dry gas enters the gas pipe from the top of the first supergravity machine The liquid at the bottom of the first supergravity machine 1 enters the first absorbent regeneration tower 3 for absorbent regeneration. The operating pressure in the first supergravity machine is controlled at 0.8MPa, the operating temperature is controlled at 25°C, and the gas is The residence time in the first supergravity machine is 0.3min; after the liquid at the bottom of the first supergravity machine 1 enters the first absorbent regeneration tower 3, the temperature rise...

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Abstract

The invention relates to a device and method for producing sodium bisulfide by utilizing refinery dry gas. Aiming at the gas composition characteristics of the refinery dry gas, the dry gas refining desulphurization process is processed by utilizing an ultra-high gravity technology, and H2S in acid tail gas after dry gas refining desulphurization is selectively removed, so that the content of the purified H2S is over 99 percent, the purified and refined H2S is absorbed for preparing high-purity NaHS by adopting a continuous alkali liquor cycle, the concentration purity is over 42 percent, the process technology is greatly innovated, the investment is saved, secondary pollution is avoided, a process of a traditional out-dated NaHS product can be replaced, the device has a certain economic benefits and high-efficiency resource utilization rate, the H2S in the acid gas is almost recycled completely, the requirements of environment friendliness and emission are met, high social benefits are achieved, and recycling comprehensive utilization of refinery acid tail gas is realized.

Description

technical field [0001] The invention relates to a device and method for producing high-purity NaHS by using refinery dry gas, belonging to the technical field of petrochemical industry. Background technique [0002] Hydrocarbon gases are produced during the processing of process units such as atmospheric and vacuum distillation, catalytic cracking, catalytic reforming, hydrocracking and delayed coking in refineries. After the absorption and stabilization process, these gases are separated under a certain pressure to produce dry gas. Main ingredients include: CH 4 15-40%, C 2 h 6 8-20%, C 2 h 4 8~22%, C 3 h 8 0.20~1.40%, C 3 h 6 1.00~1.50%, H 2 10-50%, H 2 S is 0.10~1.50%, CO 2 0.10-4.50% for air and 1-20% for others. At present, the domestic and foreign research directions on the recovery and utilization of catalytic cracking dry gas mainly focus on four aspects: hydrogen recovery, hydrogen production raw material, ethylbenzene production, ethylene and light hydr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B17/32
Inventor 黄益平陈英才岳昌海陆晓咏徐义明
Owner CHINA CONSTR IND & ENERGY ENG GRP CO LTD
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