Method for desulphurization of dry gas and liquefied gas

Abstract

The invention discloses a method for desulphurization of dry gas and liquefied gas. The method comprises the following steps: allowing sulfur-containing dry gas to enter a liquid separation tank for dry gas under the conditions of a temperature of 40 DEG C and a pressure of 1.3 MPa so as to remove liquid drops and mechanical impurities carried by the sulfur-containing dry gas; then allowing the treated dry gas to enter the lower part of a dry-gas desulphurization tower for countercurrent contact with lean amine liquid pumped into the dry-gas desulphurization tower from an amine liquid circulating pump, wherein H2S in the dry gas is absorbed by the lean amine liquid, and then separating a solvent carried by the dry gas without H2S in virtue of a gravity settling section and a wire mesh demister in the dry-gas desulphurization tower; allowing the dry gas to enter a settlement tank for further settlement and separation of the carried solvent; allowing the treated dry gas to enter a hydrogen concentration apparatus via a pressure-regulating valve; and allowing the dry gas having been treated by the hydrogen concentration apparatus to enter a whole-plant high-pressure gas system. The method provided by the invention can thoroughly treat sulfur components in dry gas and liquefied gas, prepare dry gas and liquefied gas with high purity, avoids environmental pollution in subsequent combustion of dry gas and liquefied gas, and protects human health.

Description

technical field [0001] The invention belongs to the petroleum field, in particular to a method for realizing desulfurization of dry gas and liquefied gas. Background technique [0002] Oil and gas is the gas that comes out of oil wells with oil, and its main components are methane, ethane, etc. Used as fuel and chemical raw material. Oil and gas generation has the following conditions. First, it depends on the amount of organic matter in the oil source layer, which is usually called "organic matter abundance". Mainly measure the residual organic carbon content in order to determine whether there are oil-generating layers in an area and how many oil-generating layers there are, and divide them into good, medium and poor oil-generating layers according to certain standards for classification and evaluation. Second, it depends on the quality of organic matter in the oil source layer, which is usually called "organic matter type". According to the biological source, the kerog...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the above-mentioned existing dry gas and liquefied gas, which contain more sulfur components inside, and the treatment efficiency is poor, so that the dry gas and liquefied gas produce sulfide when they are finally used, pollute the environment and fail to meet the standard, which is harmful to people. The body also causes damage. A method for desulfurization of dry gas and liquefied gas is designed. This process can clean the sulfur components in dry gas and liquefied gas, and obtain dry gas and liquefied gas with higher purity. Subsequent combustion will not cause environmental pollution and protect people's health. It solves the problem that the existing dry gas and liquefied gas contain more sulfur in the interior, and the processing efficiency is poor, which makes the dry gas and liquefied gas Produce sulfide, pollute the environment and fail to meet the standards, and cause damage to people's bodies

[0005] To sum up, the beneficial effects of the present invention are: the process can clean the sulfur components in dry gas and liquefied gas, and obtain dry gas and liquefied gas with high purity, which will not cause environmental pollution during subsequent combustion and use. It also protects people's physical safety, and solves the problem that the existing dry gas and liquefied gas contain more sulfur components inside, and the processing efficiency is poor, which makes the dry gas and liquefied gas produce sulfide when they are finally used, pollute the environment and fail to meet the standards. Problems that also cause damage to people's bodies