A waste oil-based drilling fluid solid residue treating method

Abstract

A waste oil-based drilling fluid solid residue treating method is disclosed. The main objective is to overcome the problem that oil, inorganic salts and metal ions in discharged drilling fluid solid waste exceed standards. The method is characterized in that mud waste liquid is treated through a vibrating screen, drilling scraps are fed into a drying system storage tank, mud is fed into a settling tank and separated, then dehydration separation is performed, materials in the drying system storage tank are fed into a system spin dryer, subjected to spin drying, fed into a disc type dryer after dehydration, and dried, residues after drying are fed into a fluidized bed incinerator, the incineration temperature is controlled, gas after incineration is dedusted by a deduster and then fed into a water heater, nitrate in exhaust gas that is finally generated is treated through an SCR+NSCR process, then desulphurization is performed by a two-alkali process, the exhaust gas is fed into an absorption column and brought into reverse contact with a cyclic liquid that is mist formed by injection through an atomizing nozzle, and dust in the exhaust gas is adsorbed by the cyclic liquid to achieve thorough dust removing. The treating method can achieve thorough harmless treatment for waste oil-based drilling fluid solid residues.

Description

technical field [0001] The invention relates to a method for treating drilling mud waste liquid applied in the drilling field. Background technique [0002] Drilling mud waste liquid is one of the main pollutants produced during oilfield development and production. If the drilling mud waste liquid is not treated in time, it will have varying degrees of impact on the production area and the surrounding environment: Drilling mud waste liquid The volatilization of oil and gas in the production area makes the concentration of total hydrocarbons in the air quality exceed the standard; the scattered and piled drilling mud waste liquid pollutes surface water and even groundwater, causing COD, BOD and petroleum in the water to seriously exceed the standard; drilling mud waste liquid contains a large amount of crude oil, As a result, the oil in the soil exceeds the standard, and the soil is compacted, destroying the vegetation in the area, degrading the grassland, and affecting the e...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the technical problems mentioned in the background technology, the present invention provides a treatment method for the solid residue of waste oil-based drilling fluid, which can solve the problem of excessive oil, inorganic salts and metal ions in the waste solids of drilling fluid discharged out , avoid soil pollution, and realize the complete and harmless disposal of waste solids in drilling fluid

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