Composite coagulant and method for refined oil storage oil-containing sewage treatment

A technology of sewage treatment and coagulant, which is applied in the direction of flocculation/sedimentation water/sewage treatment, etc. It can solve the problems of water quality, large fluctuations in water volume, excessive organic matter, and unstable operation of biochemical treatment units, etc., to achieve a wide range of water quality applications , The effect of low drug cost

Active Publication Date: 2015-12-09
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The particularity of the water quality of oily sewage in refined oil depots is that in addition to petroleum, there are a large amount of gasoline and diesel additives such as methyl tert-butyl ether (MTBE) soluble in water. Process treatment of oily sewage, the coagulation and air flotation process in this process can remove dispersed oil and emulsified oil in sewage by adding conventional coagulants such as polyaluminum chloride (PAC) and polyacrylamide (PAM) combined with air flotation devices Colloidal substances, such as methyl tert-butyl ether (MTBE) and other gasoline and diesel additives soluble in water, have no removal effect, resulting in serious excess of organic matter (COD) in sewage
[0003] Biochemical method is one of the effective means to remove organic COD in sewage. However, due to the intermittent discharge of oily sewage from oil depots, large fluctuations in water quality and water volume, and poor biodegradability of sewage, the biochemical treatment units of most enterprises cannot operate stably.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A composite coagulant for oily sewage treatment in a refined oil depot, including agent A and agent B, wherein agent A is prepared from the following raw materials according to the following weight percentage: Ca(OH) 2 10%, sodium carbonate 20%, diatomaceous earth 50%, powdered activated carbon 20%, agent B is prepared from the following raw materials according to the following weight percentages: magnesium sulfate 10%, ferrous sulfate 30%, polyferric sulfate 30%.

[0023] A method for treating oily sewage in a refined oil depot, the method comprising the following steps:

[0024] Step 1: After degreasing the oily sewage of the refined oil depot, take a 500ML sample, and the COD in the sample is 2561mg / L after testing;

[0025] Step 2: Take 2.5g of medicament A, add medicament A to the above sample and stir, add 1g of medicament B after stirring evenly, and carry out precipitation reaction, wherein, medicament A is prepared from the following raw materials according to ...

Embodiment 2

[0028] A composite coagulant for oily sewage treatment in a refined oil depot, including agent A and agent B, wherein agent A is prepared from the following raw materials according to the following weight percentage: Ca(OH) 2 30%, sodium carbonate 30%, diatomaceous earth 25%, powdered activated carbon 15%, agent B is prepared from the following raw materials according to the following weight percentages: magnesium sulfate 25%, ferrous sulfate 45%, polyferric sulfate 30%.

[0029] A method for treating oily sewage in a refined oil depot, the method comprising the following steps:

[0030] Step 1: After degreasing the oily sewage of the refined oil depot, take a 500ML sample, and the COD in the sample is 2248mg / L after testing;

[0031] Step 2: Take 2.5g of medicament A, add medicament A to the above sample and stir, add 1g of medicament B after stirring evenly, and carry out precipitation reaction, wherein, medicament A is prepared from the following raw materials according to ...

Embodiment 3

[0034] A composite coagulant for oily sewage treatment in a refined oil depot, including agent A and agent B, wherein agent A is prepared from the following raw materials according to the following weight percentage: Ca(OH) 2 20%, sodium carbonate 50%, diatomaceous earth 15%, powdered activated carbon 15%, agent B is prepared from the following raw materials according to the following weight percentages: magnesium sulfate 15%, ferrous sulfate 40%, polyferric sulfate 45%.

[0035] A method for treating oily sewage in a refined oil depot, the method comprising the following steps:

[0036] Step 1: After degreasing the oily sewage of the refined oil depot, take a 500ML sample, and the COD in the sample is 2248mg / L after testing;

[0037] Step 2: Take 2.5g of medicament A, add medicament A to the above sample and stir, add 1g of medicament B after stirring evenly, and carry out precipitation reaction, wherein, medicament A is prepared from the following raw materials according to ...

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PUM

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Abstract

The present invention discloses a composite coagulant for refined oil storage oil-containing sewage treatment. The composite coagulant comprises an agent A and an agent B, wherein the agent A is prepared from the following raw materials by weight: 10-40% of Ca(OH)2, 20-50% of sodium carbonate, 15-50% of diatomaceous earth, and 2-20% of powder active carbon, and the agent A is prepared from the following raw materials by weight: 10-30% of magnesium sulfate, 30-60% of ferrous sulfate, and 30-60% of polyferric sulfate. The present invention further discloses a method for refined oil storage oil-containing sewage treatment, wherein the method comprises: 1, deoiling refined oil storage oil-containing sewage, and 2, adding the agent A to the deoiled refined oil storage oil-containing sewage, stirring, adding the agent B after uniformly stirring, and carrying out a precipitation reaction. According to the present invention, the water-soluble organic matters incapable of being removed by the conventional coagulants can be effectively removed, and the oil storage sewage treatment requirements with different pollutant concentrations can be met.

Description

technical field [0001] The invention belongs to the field of sewage treatment, and in particular relates to a composite coagulant and a method for treating oily sewage in a product oil depot. Background technique [0002] The oily sewage of the refined oil depot mainly comes from the initial rainwater in the reservoir area, ground flushing water, oil tank cutting water, tank cleaning operation drainage, loading and unloading operation drainage, etc. The particularity of the water quality of oily sewage in refined oil depots is that in addition to petroleum, there are a large amount of gasoline and diesel additives such as methyl tert-butyl ether (MTBE) soluble in water. Process treatment of oily sewage, the coagulation and air flotation process in this process can remove dispersed oil and emulsified oil in sewage by adding conventional coagulants such as polyaluminum chloride (PAC) and polyacrylamide (PAM) combined with air flotation devices Colloidal substances, such as me...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/52
Inventor 唐晓丽郭亚逢牟桂芹隋立华
Owner CHINA PETROLEUM & CHEM CORP
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