System treatment method for oil field oily sludge

Abstract

Provided is a system treatment method for oil field oily sludge. The system treatment method aims to conduct thorough harmless disposal on oily sludge produced by an oil field and is used for solving the problems that the oiliness of discharged oily sludge exceeds the standard and the operation cost is high. The system treatment method for the oil field oily sludge is characterized by comprising the steps that the sludge is filtered first; large materials filtered out are fed into a rotary kiln to be incinerated, and other materials are conveyed to a drying table to be dried; meanwhile, oil water is collected; the dried sludge is fed into the rotary kiln to be incinerated to be inorganic; gas generated by incineration enters a secondary combustion chamber to be further thoroughly incinerated; heat generated by incineration is used for heating water in a boiler; the hot water flows to the drying table along a pipeline to heat the sludge; cooled water flows back into the boiler; saltpetre contained in the generated flue gas is processed by an SCR / SNCR process, the boiler flue gas enters an absorption tower, and generated sulfur is absorbed; and the flue gas continues to enter a wet electrostatic dust collector to be subjected to dust treatment and then is discharged.

Description

technical field [0001] The invention relates to a method applied in the field of oilfield sludge drying and incineration treatment. Background technique [0002] Oily sludge is one of the main pollutants produced in drilling, fracturing, test production, operation, crude oil treatment, oily sewage treatment, crude oil storage and transportation in the process of oilfield development and production. Oily sludge cannot be treated in time. It will have varying degrees of impact on the production area and the surrounding environment: the oil and gas in the oily sludge volatilize, causing the total hydrocarbon concentration in the air quality in the production area to exceed the standard; the scattered and piled oily sludge pollutes surface water and even groundwater, causing COD, BOD and petroleum are seriously exceeded; oily sludge contains a large amount of crude oil, resulting in excessive petroleum in the soil, soil compaction, destruction of vegetation in the area, degradat...

AI Technical Summary

Problems solved by technology

However, direct incineration not only consumes a lot of energy, but also produces flue gas that will cause secondary pollution to the environment, so a systematic sludge incineration treatment process is necessary.

However, in the existing sludge incineration treatment methods, there is no systematic treatment method directly for oily sludge in oil fields, so the effect is not good when dealing with oily sludge in oil fields

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