Oily sludge treatment equipment for oil field

Abstract

The invention provides oily sludge treatment equipment for an oil field, and belongs to the field of sludge treatment of the oil field. The oily sludge treatment equipment comprises a stacked spiral type dehydrater; the oily sludge is dehydrated by the stacked spiral type dehydrater, and sent into a blade wet oil sludge dryer to dry; after the oily sludge is dried by the blade wett oil sludge dryer, the oily sludge is sent into a oil sludge pulping machine to pulp, and then sent into a dirt oil sludge slurry tank; the oily sludge is sent into a stirring and shearing extractor by a screw pump,and the stirring and shearing extractor is communicated with an extracting liquid tank; the sludge is crushed and extracted by the stirring and shearing extractor, and then sent into an automatic discharge centrifugal machine; the sludge is treated by the automatic discharge centrifugal machine, and sent into a sludge extracting rake type vacuum dryer; the sludge is dried by the sludge extractingrake type vacuum dryer, and sent to a dry sludge stacking yard. The oily sludge treatment equipment has the advantages that the solvent extracting technique is adopted; the oil in the oil sludge is extracted by the extracting liquid, so that the oil is completely separated from the sediment; the residues after treatment can be directly applied to other crops, except vegetables and grains.

Description

technical field [0001] The invention belongs to the field of oilfield sludge treatment, in particular to oilfield oily sludge treatment equipment. Background technique [0002] A large amount of sludge is generated in the process of crude oil production, transportation and processing. The generation amount of sludge is 0.5-1.0% of crude oil output. According to statistics, before 2008, the total amount of oily sludge produced in my country reached more than 5 million tons every year, and it showed an increasing trend year by year. Sludge is produced in a large amount and has a complex composition. Besides crude oil, it also contains a variety of harmful components. It is listed as hazardous solid waste by the country and needs to be disposed of properly, otherwise it will seriously pollute the environment. [0003] Sludge sludge comes from a wide range of sources and is complex in composition. Usually, in addition to a large amount of aged crude oil, suspended solids, salt...

AI Technical Summary

Problems solved by technology

Incomplete treatment process: At present, most of the sewage sludge treatment plants that have been built in China have a single process. Oil sludge is less effective or cannot be treated; some do not have front-end pretreatment equipment, and directly use incineration or pyrolysis treatment, which is not only costly but also poor in effect. It is not removed but directly sent to the incinerator for treatment. As a result, due to the low calorific value of the sludge itself, additional fuel is required and the low capacity reduction rate of the equipment results in short residence time of the material, incomplete combustion, and unqualified treatment, which eventually leads to shutdown.

[0005] Incomplete treatment: In sewage sludge treatment plants using washing treatment technology, the oil content of residues after treatment is usually still as high as 2% or more

Such as landfill treatment will greatly increase the cost, so it can only be accumulated in large quantities. The hidden danger of accumulation in large quantities is that once it leaks in the rain, it will cause secondary pollution.

[0006] There is no fully mature technology: Although there are many treatment technologies at home and abroad, such as cleaning (hot washing, active water washing), extraction, pyrolysis, incineration and other treatment, disposal and utilization technologies, however, each technology has its advantages and disadvantages. Adaptive selectivity can only solve the problem of treatment or resource utilization of part of the sludge, but for complex components, such as mixed sludge with both ground sludge, tank bottom sludge, and aggregated scum bottom sludge, etc., It is still impossible to achieve "three modernizations" by using a single method

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