In-station sulfur-removal skid-mounted device for oil field sewage with high hydrogen sulfide content and method thereof

Abstract

The invention discloses an in-station sulfur-removal skid-mounted device for oil field sewage with high hydrogen sulfide content and a method thereof. The sulfur-removal device comprises a sulfur removal tank body, one path of the sulfur removal tank body is sequentially communicated with a valve, a solid-liquid separator and a liquid feeding pump to a sewage treatment system through a sewage discharge pipeline, a pressure gauge, an H2S gas detector and an exhaust port are arranged at the top of the sulfur removal tank body, and the exhaust port is communicated with a blow-down pipe; wherein apH sensor, a temperature sensor and a liquid level sensor are further arranged on the sulfur removal tank body, a solid sulfur removal module for sewage treatment is arranged in the sulfur removal tank body, and a solid sulfur removal module is arranged at a sewage inlet of the sulfur removal tank body. The corrosion of high-hydrogen-sulfide-content oil field sewage to in-station pipelines, tanksand other metal facilities can be effectively relieved, the sewage standard treatment difficulty can be effectively improved, and the ecological environment and personal safety are protected.

Description

technical field [0001] The invention relates to the fields of anti-corrosion technology and environmental protection in oil field development, and relates to a skid-mounted device and method for desulfurization in a combined station where metal pipelines, tanks and facilities in oil fields will be severely corroded in sewage with high hydrogen sulfide content. Background technique [0002] During the development of sulfur-containing oilfields, especially those with high hydrogen sulfide content, H 2 S corrosive gas, or due to the long-term growth of certain sulfate-reducing bacteria (SRB) in the pipeline will also produce H 2 S gas is dissolved in oilfield sewage. After the oilfield sewage enters the joint station, the metal pipelines and tanks in the station will be dissolved with H 2 S sulfur-containing sewage or a large change in temperature and pressure, such as oil field sewage from the pressure pipeline to the sewage tank in the normal pressure environment, resulting...

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Problems solved by technology

For example, the physical gas stripping sulfur removal method uses H 2 S has low solubility in sewage, so use gas, air, etc. to reduce H 2 The gas phase partial pressure of S makes H 2 S and S are separated, but this method requires a large investment in equipment and high cost; chemical oxidation (air oxidation, chemical oxidation, photocatalytic oxidation) is to oxidize sulfide to sulfur element removal, but the cost is high, energy consumption is large, It is easy to cause secondary pollution; the chemical deposition method is to use metal ions and S in sewage 2- 、HS - 、H 2 S and other separation methods to form precipitates, but adding a large amount of precipitating agents and a large amount of water-containing sludge can easily cause secondary pollution; biochemical treatment is often used in conjunction with other sulfur removal methods, and the selection of bacteria is the key. Its oxidation effect is fast and energy-efficient. Low power consumption, but high investment and special requirements for equipment materials

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