Coagulant for treating polysulfonate slurry sewage

A coagulant and mud technology, applied in the direction of flocculation/sedimentation water/sewage treatment, etc., can solve the problem of low chroma treatment efficiency, achieve the effect of improving chroma removal rate and accelerating flocculation

A coagulant and mud technology, applied in the direction of flocculation/sedimentation water/sewage treatment, etc., can solve the problem of low chroma treatment efficiency, achieve the effect of improving chroma removal rate and accelerating flocculation

CN102786127AInactive Publication Date: 2012-11-21成都凯迈环保技术有限公司
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  • Coagulant for treating polysulfonate slurry sewage

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Select I1L of polysulfide mud sewage sample from drilling in a certain area of ​​Sichuan to analyze the COD in the sewage Cr And measure chromaticity with dilution multiple method, add the coagulant that the processing polysulfide mud sewage provided by the present invention is processed in order then, wherein calcium hydroxide add-on is 4g, and ferrous sulfate add-on is 11.5g, analysis and treatment after sewage.

Embodiment 2

[0019] Select II1L of polysulfide mud sewage sample from drilling in a certain area of ​​Sichuan to analyze the COD in the sewage Cr And measure chromaticity with dilution multiple method, then add the coagulant that the present invention provides to process polysulfide mud sewage in order and process it, wherein calcium hydroxide add-on is 5g, and ferrous sulfate add-on is 11.5g, analyzes Treated sewage.

Embodiment 3

[0021] Select III1L of polysulfide mud sewage sample from a certain area in Sichuan to analyze COD in sewage Cr And measure chromaticity with dilution multiple method, then add the coagulant that the present invention provides in order to process polysulfide mud sewage and process it, wherein calcium hydroxide add-on is 4g, ferrous sulfate add-on is 8.7g, then Then, 50 mg of polyacrylamide was added to the sewage treated by the above treatment steps, and the treated sewage was analyzed.

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Abstract

The invention discloses a coagulant for treating polysulfonate slurry sewage. The coagulant for treating the polysulfonate slurry sewage provided by the invention comprises calcium hydroxide or calcium oxide, and ferric sulfate or ferrous sulfate. The coagulant for treating the polysulfonate slurry sewage provided by the invention is used for treating the sewage containing polysulfonate slurry; the CODCr (Chemical Oxygen Demand) of the treated sewage is reduced by 70-85 percent; the chrominance is determined by using a dilution multiple method and can be reduced to 180-220; the subsequent physicochemical treatment and biochemical treatment can more easily reach standards; and the treatment cost is low.

Description

technical field [0001] The invention relates to a coagulant for treating sewage, in particular to a coagulant for treating drilling sewage rich in sulfonated mud sewage. Background technique [0002] In the process of drilling in oil and gas fields, the wastewater formed due to the loss of mud during tripping operations, the leakage of the mud circulation system, and the flushing of mud and oil on ground equipment and drilling tools is called drilling wastewater. In the drilling process, especially in the deep well drilling process, in order to achieve safe and fast drilling, polysulfonate mud that can prevent collapse, high temperature and salt is generally used. Since this type of drilling fluid system contains sulfonated phenolic resin, sulfonated baked gum, sulfonated tannin and other salt-resistant and temperature-resistant synthetic treatment agents, surfactants, etc., the resulting drilling wastewater contains a large amount of suspended solids and oil Class substanc...

Claims

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Application Information

Patent Timeline
21 Nov 2012
Publication
CN102786127A
IPC
C02F1/52
Inventors
田庆华; 杨斌中