Salt removal device and method for supercritical reaction of hypersalinity water

Abstract

The invention discloses a salt removal device and method for supercritical reaction of hypersalinity water, and belongs to the technical field of heavy oil thermal recovery. According to the salt removal device, the hypersalinity water supercritical reactor is communicated with a high-pressure desalting cooling tank, inorganic salt precipitates and hypersalinity water in the hypersalinity water supercritical reactor enter the high-pressure desalting cooling tank, and the high-pressure desalting cooling tank is cooled by the cooling circulation tank on the periphery of the high-pressure desalting cooling tank; the temperature in the high-pressure desalting cooling tank is reduced, inorganic salt precipitates are dissolved in the hypersalinity water again, the hypersalinity water in the high-pressure desalting cooling tank enters the second-stage cooling salt discharging tank under the pressure difference by controlling the pressure difference between the second-stage cooling salt discharging tank and the high-pressure desalting cooling tank, the pressure of the hypersalinity water is further reduced, and then the salt is discharged through a bottom outlet of the secondary cooling salt discharging tank. According to the salt removal device, the problems of salt deposition and blockage of hypersalinity water in the supercritical reactor are reduced through differential pressure salt discharging.

Description

technical field [0001] The invention belongs to the technical field of heavy oil thermal recovery, in particular to a salt removal device and method for supercritical reaction of high salinity water. Background technique [0002] Heavy oil resources are extremely rich in the world. According to statistics, the geological reserves of conventional crude oil on the earth are about 4.6×10 11 m 3 , while the reserves of heavy oil and super heavy oil are 3.4 times that of conventional crude oil, reaching 1.55×10 12 m 3 . my country is rich in heavy oil resources and widely distributed. At present, a large number of heavy oil reservoirs have been discovered in 15 large and medium-sized oil-bearing basins such as Songliao Basin, Bohai Bay Basin, Junggar Basin, Nanxiang Basin, and Erlian Basin, and the national heavy oil geological reserves are predicted to be 8×10 9 t above. [0003] The working principle of the traditional multi-element thermal fluid generation system is to u...

AI Technical Summary

Problems solved by technology

However, the current multi-component thermal fluid generator has the following disadvantages: the water treatment process is complex, and it is impossible to directly use high-salinity water and heavy oil production water and other platform wastewater; often large-scale water purification equipment is required to produce seawater and high-salinity heavy oil. The water is purified and injected into the generator for operation

The current equipment cannot meet the desalination operation under supercritical conditions for supercritical reactors

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