METHOD FOR THE REGENERATION OF SPENT PROCESS FLUIDS AND A DEVICE FOR THE REGENERATION OF SPENT PROCESS FLUIDS Russian patent published in 2022 - IPC E21B21/06 B03B9/02 C02F1/52 C02F1/66 

FIELD: waste treatment.

SUBSTANCE: group of inventions relates to a method and equipment for the treatment of process fluids previously used for various purposes at a well, with the release of an oil component and a reduction in the hazard class of the aqueous and solid phase. The method for regeneration of spent process fluids based on an aqueous solution of calcium chloride includes the collection of spent process fluids at the well, mechanical cleaning, coagulation of the solution with coagulants and flocculants, final cleaning, preparation of the solution at the solution-salt unit for silencing the well and regulation of the hydrogen pH of the solution. When performing the method, the collected waste process fluid is pumped by pumps into the coagulation and regulation unit of the hydrogen pH index, which is connected to the mechanical cleaning unit by a common pipeline and a common pump, the outlet from the mechanical cleaning unit is connected to the final cleaning filter unit containing a two-section clarifier, a coalescing filter and a post-purification filter, the outlet of which is connected to the solution-salt unit, and coagulation of the solution with coagulants and flocculants is carried out from the ratio: coagulant from 0.25 to 0.5 kg per 1 m³ of process fluid, flocculant from 0.005 to 0.01 kg per 1 m³ of process fluid. A solution of a base density of 1.36 g/cm³ is prepared in the solution-salt unit. When releasing the solution, it is diluted to the required concentration. The solution of these tasks has been achieved in a device for the regeneration of spent process fluids. A device for the regeneration of spent process fluids may contain a hydrogen sulfide purification system.

EFFECT: more complete purification of spent process fluids from hazardous foreign impurities and correction of the density of the solution.

7 cl, 3 dwg, 3 tbl