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Process for treating oil-containing sludge

A sludge treatment and sludge technology, applied in the direction of dewatering/drying/concentrating sludge treatment, can solve the problems of polluting the surrounding environment of the landfill, waste of petroleum resources, etc., achieving no secondary pollution, good treatment effect, energy low consumption effect

Inactive Publication Date: 2008-03-26
BEIJING ZHONGYOU AISUO ENVIRONMENT ENG TECH
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0005] Because there are still many problems in the treatment process, there is currently no low-cost, high-tech method or equipment that can be popularized and applied. After natural drying, direct landfill or construction of storage pools for temporary storage is still the treatment of most oil companies. The preferred treatment method for oily sludge, a large amount of landfilled oily sludge not only wastes oil resources, but also pollutes the surrounding environment of the landfill

Method used

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  • Process for treating oil-containing sludge

Examples

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Embodiment 1

[0028] A method for treating oily sludge according to Embodiment 1 of the present invention includes a concentration treatment step, a flocculation-centrifugal dehydration step and a drying treatment step, wherein:

[0029] In the concentration treatment step, the oily sludge collected or collected in the sludge tank is lifted to the sludge concentration tank through the sludge pump, and the sludge in the concentration tank is mainly processed by gravity settlement to further remove part of the free water, and the reaction The time is 2 to 60 hours, and the concentrated sludge wastewater is discharged into the sewage field.

[0030] After concentration treatment, the moisture content of the sludge can be reduced from about 99% to about 97%-98%, and the volume is reduced by more than 50%.

[0031] The concentration treatment step of the oily sludge treatment method of this embodiment may further include a step of heating the sludge, and the sludge is heated to 20-60°C to ensure...

Embodiment 2

[0072] In this example, the oily sludge treatment method in Example 1 is further improved. In this example, the steps of fixing and removing sulfur-containing malodorous substances are added, and other aspects of the process flow are the same as those in Example 1.

[0073] The main odorous substances produced by oily sludge are hydrogen sulfide and mercaptans. The sulfide content in the "three sludges" produced by refining and chemical enterprises is generally very high, resulting in high hydrogen sulfide content in and around the three sludge treatment facilities and sites. In the traditional three sludge treatment process, the operators caused by hydrogen sulfide Poisoning and even death occurred frequently. The sulfides in the three sludges mainly come from two sources. One is that after the sulfur element in the processed crude oil is processed, part of it enters the sewage treatment plant in the form of sulfides, and finally enters the three sludges; the other part of th...

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Abstract

The present invention is oil-containing sludge treating process, which includes one concentrating treatment step, one flocculating and centrifugally dewatering step and one drying step. The settled and concentrated sludge is discharged to the concentrated sludge conveying pipeline while flocculant is added for mixing with the concentrated sludge to react, and the flocculated sludge is dewatered in a centrifugally dewatering machine and dried in a steam jetting sludge treating system, with the dried sludge being further utilized externally. The process includes also one odorous material fixing and eliminating step. The process has high treating effect, universality, no secondary pollution, capacity of recovering petroleum resource, low power consumption, low running cost and other advantages.

Description

technical field [0001] The invention relates to a method for treating oily solid waste in petroleum enterprises, in particular to a method for treating oily sludge. Background technique [0002] Landed sludge, tank bottom sludge, and oily "three muds" in refineries (grease trap bottom sludge, dissolved air flotation tank scum, crude oil tank bottom sludge) often occur in oil fields and petroleum refineries. , they are collectively referred to as oily sludge. The hydrogen sulfide, mercaptans, amines and other substances contained in these sludges have a foul smell and toxicity. If they are directly discharged into the natural environment, they will cause serious pollution to the surrounding soil, water and vegetation. Also wasted a large amount of petroleum resources simultaneously. Therefore, no matter from the perspective of environmental protection or energy recovery, oily sludge must be treated. [0003] The traditional oily sludge treatment mode is: sludge preparation...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/12C02F11/14
Inventor 王占生张有林邓皓许立甲丛飙杜海波吴宁王嘉麟刘翔刘光全杜维君赵杰李春晓
Owner BEIJING ZHONGYOU AISUO ENVIRONMENT ENG TECH
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