Assistant for removing unknown black suspended solid particles in crude oil and jet nozzle device for assistant filling

Abstract

The invention discloses an assistant for removing unknown black suspended solid particles in crude oil and a jet nozzle device for assistant filling. The assistant is prepared from, by weight, 30-35 parts of propylene glycol blocked polyether, 1-3 parts of glutaraldehyde, 7-10 parts of alpha-olefin sulfonate, 12-18 parts of polyethylene glycol, 12-18 parts of ethylene-vinyl acetate copolymer and 25-30 parts of miscella. The assistant can eliminate a transition layer between oil and water, stabilize electro-desalting operation, purify the quality of discharged water and make lighter oil-solubleblack suspended particles break away from an emulsion layer and enter crude oil. Part of water-soluble inorganic salt is dissolved in water after gel breaking, the oil content of desalting water is smaller than 100 ppm, and COD is smaller than 1200 ppm. Bigger insoluble black suspended particles are gathered to become into bigger particles and deposit at the bottom, and the particles are discharged together with water. The assistant can be uniformly sprayed into flowing crude oil by utilizing a special assistant filling device.

Description

technical field [0001] The invention belongs to the technical field of crude oil additives, and in particular relates to an additive for removing unknown black suspended matter solid particles in crude oil and a nozzle device for adding the additive. Background technique [0002] Due to the presence of unidentified black suspended particles in light crude oil in some oilfield production areas, some PetroChina refineries have begun to affect the long-term operation of atmospheric pressure devices due to large fluctuations in crude oil quality, mainly in the following areas: [0003] (1) Crude oil contains emulsified non-oily substances. The density of the emulsion is between that of crude oil and water, making electrical desalination and removal in storage and transportation tank areas particularly difficult. In particular, the emulsion is likely to cause high current in the electrical desalination device , Electric desalination trips occur frequently, which seriously affects...

AI Technical Summary

Problems solved by technology

[0003] (1) Crude oil contains emulsified non-oily substances. The density of the emulsion is between that of crude oil and water, making electrical desalination and removal in storage and transportation tank areas particularly difficult. In particular, the emulsion is likely to cause high current in the electrical desalination device , the electric desalination trip occurs frequently, which seriously affects the long-term operation of the electric desalination

[0004] (2) The dehydration of the electric desalination device often turns black, which brings great difficulties to the treatment of oily sewage, and has a serious impact on the sewage treatment system of the whole plant, and there is a potential risk of excessive sewage discharge

[0005] (3) Black suspended solids are carried in the crude oil, which causes the sulfur-containing sewage at the top of the atmospheric tower to turn black, gelatinous matter accumulates and blocks the tray of the atmospheric tower in the atmospheric device, the tray is fouled, and the acidic water vapor is lifted to the sulfur recovery device Abnormal fluctuations often occur, and there are serious difficulties in the operation of the device, which seriously restricts the realization of the three-year major maintenance goal

[0006] (4) The black suspended solids are closely related to the dirty oil, resulting in abnormal operation of the waste oil recovery and refining system

[0007] With the development of oilfields in the middle and later stages, the development of various chemical flooding agents (polymer injection, surfactants, alkalis, etc.) Stable, the oil-water intermediate transition layer tends to thicken gradually, the black solid particles in the transition layer are enriched, suspended between the crude oil and the water phase, and exist in the crude oil and water, this black granular substance contains a large amount of colloidal sulfide Iron particles and fine ferrous sulfide particles stabilize the oil-water transition layer. At the same time, various chemicals in the produced fluid also enhance the stability of the oil-water transition layer, which often causes oil quality outside the electric dehydrator of the oilfield joint station (such as water, salt, mechanical impurities, etc.) and the water quality of the detached sewage exceeds the standard

Due to the large amount of FeS contained in the crude oil exported from the oil field, similar problems also exist in the electric desalination of the refinery, resulting in unstable electric field and high current of the electric desalination device, especially causing great difficulties for the treatment of oily sewage in the refinery

[0008] At present, the research on the thickening of the oil-water intermediate transition layer caused by suspended particles and chemical agents used for oil displacement and the treatment methods are mainly concentrated on the electric dehydrator of the oilfield combined station, and there is little research on the electric desalination stage of the refinery, and there is no one. Effective products and devices to solve the above problems

Images