Composite flocculation deoiling agent for oil-containing sewage

A technology of sewage treatment and degreasing agent, applied in the direction of flocculation/sedimentation water/sewage treatment, etc., can solve the problems of high price, complicated preparation, unsatisfactory effect, etc., and achieve the effect of low cost, simple preparation and high degreasing efficiency

Inactive Publication Date: 2007-10-24
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The main disadvantage of this invention is that its preparation is complicated, expensive, and the effect is not ideal

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] The composition of the flocculating degreasing agent: 50% of aluminum sulfate, 20% of magnesium chloride, 20% of magnesium hydroxide, 5% of bentonite, and 5% of polyacrylamide (cation, molecular weight 12 million).

[0011] The industrial sewage of an oil refinery, the water quality before treatment is: oil 100mg / l, COD1211mg / l, the above-mentioned flocculation degreasing agent is made into an aqueous solution according to 5:95 (weight), and is added into the air flotation device with a pump, and the addition amount is 10mg / l l. The water quality after treatment is COD530mg / l, the removal rate is 56%, oil is 28mg / l, the removal rate is 72%.

Embodiment 2

[0013] Composition of flocculation degreasing agent: 89.5% of aluminum sulfate, 2% of magnesium chloride, 3% of magnesium hydroxide, 5% of bentonite, 0.5% of polyacrylamide (cation, molecular weight 12 million). Stir in a reaction kettle with distilled water to make a 30% product .

[0014] The oily sewage discharged from the electric desalination device of an oil refinery, the oil before treatment is 510mg / l, COD3210mg / l, suspended solids 330mg / l, is pumped into the drainage pipeline, and the addition amount is 3 30mg / l of the above products, and is treated by the sedimentation and separation device The final water quality is: oil 28mg / l, removal rate 95%, COD 530mg / l, removal rate 84.5%, suspended matter 18mg / l removal rate 94.6%.

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Abstract

The invention discloses an allocating method of composite flocculating degreaser for disposing the effluent with oil, which comprises the following parts: 50%-90% aluminium sulfate, 5%-20% magnesium chloride, 4%-20% magnesium hydroxide, 0. 5%-5% alta-mud and 0. 5%-5% polyacrylamide, wherein the materials are grinded and blended under normal temperature. The invention uses little raw material with high degreasing efficiency, simple preparation and low cost, which is especially for disposing the effluent with kinds of oil and predisposing the effluent of oil field.

Description

Technical field: [0001] The invention belongs to the field of environmental protection, and relates to a preparation method of a composite flocculation and degreasing agent for treating oily sewage, and is especially suitable for pretreatment of various oily sewage such as oil refinery and oilfield sewage. Background technique: [0002] Coagulation technology is one of the most widely used technologies in wastewater pretreatment. With the increasing environmental pollution, the control and treatment of water environmental pollution has gradually attracted enough attention and made progress in all aspects. Coagulation technology can be used to remove particulate impurities in water bodies and strengthen the removal of solutes in water bodies and the solid-liquid separation of sludge. Flocculants are one of the key links in coagulation technology, and can be divided into inorganic and organic flocculants according to their chemical properties. Because the organic polymer flo...

Claims

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Application Information

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IPC IPC(8): C02F1/52
Inventor 娄世松范洪波
Owner UNIV OF SCI & TECH BEIJING
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