Preparation method and application method of sludge degreasing agent

Abstract

The invention discloses a preparation method of a sludge deoiling agent, and belongs to the field of oilfield oil-containing sludge treatment. The sludge deoiling agent comprises 0.1-1 wt% of hydroxymethyl alkyl glycosides, 0.1-1 wt% of crosslinked fatty alcohol polyoxyethylene blocked polyether, 0.1-5 wt% of sodium carbonate, 0.01-0.1wt% of potassium pyrophosphate, and the balance of water, wherein the hydroxymethyl alkyl glycosides are prepared through modifying alkyl glucosides. The invention also discloses a use method of the sludge deoiling agent. The use method comprises the following steps: mixing oil-containing sludge with the sludge deoiling agent, placing the obtained mixture in a constant temperature reaction tank, fully washing the oil-containing sludge at a reaction temperature of 45-50 DEG C under a stirring rate of 200-450 r / min for 1-2 h, standing the obtained mixture in the reaction tank for 1-3 h to sequentially form an oil layer, a water layer and a sludge layer from top to bottom, recovering the upper oil, and discharging the lower sludge to remove oil from the oil-containing sludge. The sludge deoiling agent prepared through compounding the hydroxymethyl alkyl glycosides with other agents has the advantages of enhanced deoiling effect and low cost.

Description

technical field [0001] The invention belongs to the field of treatment of oily sludge in oilfields, and in particular relates to a method for preparing and using a sludge degreasing agent. Background technique [0002] my country's petrochemical industry produces a large amount of oily sludge every year, and the output is still increasing year by year. As a polluting substance in the "National Hazardous Waste List", oily sludge must be treated, otherwise it will affect the surrounding environment and production areas. It is also a waste of resources. Effective separation and recovery of oily components in sludge can not only reduce the waste of resources, but also a prerequisite for the development of harmless treatment and resource utilization of oily sludge. [0003] In recent years, researchers at home and abroad have carried out a lot of research work on sludge degreasing and formed many treatment methods. In the field of sludge degreasing, conditioning and tempering sep...

AI Technical Summary

Problems solved by technology

In the field of sludge degreasing, conditioning and tempering separation methods, biological treatment methods, incineration methods, solvent extraction oil recovery methods and coking method modification treatment technologies are mainly used at home and abroad, but from the perspective of application effects, there are the following problems: biological treatment methods The strain selection is difficult, the treatment period is too long, and it is difficult to adapt to the sludge with high oil content; the incineration method has high treatment costs and operating costs, and secondary pollution such as SO2, CO and dust will be generated during the treatment process; the solvent extraction recovery method has a long process, The process is complicated, the price of solvent is high and the treatment cost is high; the investment cost of coking method is high and the process is complicated

In the prior art, chemicals are used to treat oily sludge, which requires a high concentration of chemicals and the ambient temperature needs to be controlled within a specified range, resulting in high cost

In the Chinese patent database, the invention patent with the application number 201210023784.0 and the application date of 2012.02.03 discloses a treatment method for oily sludge in oil fields. In this method, the oily sludge needs to be filtered after preliminary filtration. Pass through the sieve for the next two times, add chemicals and heat to 45~60°C to remove oil, only 50% of the crude oil in the oily sludge can be recovered, the sludge has a low oil removal rate, and the steps are cumbersome and the cost is high

The invention patent with application number 201010601322.3 and application date of 2010.12.17 discloses a thermochemical separation agent for oily sludge and its use method. The thermochemical separation agent for oily sludge prepared by this method can be used to treat oily sludge, especially for oil tanks The treatment of the bottom sludge can reduce the residual oil rate of the bottom sludge to a minimum of 0.5%, which still cannot meet the requirements of the GB4284 standard of less than 0.3%.

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