An in-situ purification treatment system and method for directly supplying gas-fired boilers with low-sulfur oilfield associated gas

Abstract

The invention belongs to the technical field of resource utilization of associated gas in oilfields, and in particular relates to an in-situ purification treatment system and method for directly supplying gas-fired boilers with associated gas in low-sulfur oilfields. The invention is composed of an energy storage and voltage stabilizing device, an atomization and trapping device, a refrigerant liquid removal device, a dry filter device and the liquid phase recovery device. In the drying and filtering device of the present invention, the pressure of the associated gas is raised and lowered and the operation of the energy storage and pressure stabilizing device, the atomization and trapping device, and the liquid level control device at the bottom of the refrigerant removal device solves the problem of dispersion It is difficult to centrally collect sulfur-containing associated gas with a small amount of gas in oil wells, and it is easy to cause air pollution and poisoning of surrounding personnel when venting and burning. Compared with traditional natural gas desulfurization tower processing devices, it is no longer limited by large natural gas volume and continuous operation conditions. It ensures the resource utilization of sulfur-containing associated gas, and ensures that there is no hydrogen sulfide in the gas source, no hazards in combustion products, and no condensate in the gas supply pipeline when directly supplying gas-fired boilers.

Description

technical field [0001] The invention belongs to the technical field of resource utilization of associated gas in oilfields, and in particular relates to an in-situ purification treatment system and method for directly supplying gas-fired boilers with associated gas in low-sulfur oilfields. Background technique [0002] In the process of oil field development, boilers are required to heat the three-phase oil, gas and water in every link of crude oil from oil production wells, pressurization points, oil transfer stations, dehydration stations, combined stations to oil transportation stations, so as to achieve crude oil treatment, processing, collection and so on. Transmission and other process requirements. Oilfield production areas are scattered, the working environment is remote and harsh, and the municipal heat pipe network is difficult to cover. In order to meet the heating needs of crude oil production and employees' lives, a large number of coal-fired, oil-fired and gas-...

AI Technical Summary

Problems solved by technology

[0005] At present, there are five technical problems facing oilfield sulfur-containing associated gas direct-supply gas-fired boilers: first, the low concentration of hydrogen sulfide contained in crude oil associated gas can easily cause poisoning to the staff of the gathering and transportation station; second, the direct combustion of sulfur-containing associated gas, Condensate can easily cause pipeline blockage, and the product sulfur dioxide can easily cause atmospheric pollution; third, crude oil well sites and stations are scattered, and there are many unorganized discharge points during the gathering and transportation process, making it difficult to desulfurize sulfur-containing associated gas; fourth, associated gas in oilfields is small, The content of hydrogen sulfide is low, and it is difficult to meet the continuous work requirements of traditional natural gas desulfurization tower processing equipment. There is a risk of spontaneous combustion in sulfur deposits, and the construction cost is high. Fifth, coal-fired and oil-fired boilers are gradually phased out in the process of oilfield clean production and construction, and gas-fired boilers are widely used. The supply of crude oil-associated gas is in short supply, and the traditional way of flaring and burning sulfur-containing associated gas causes a lot of waste of resources

Images