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Ozone shunting system in PAM-containing wastewater treatment system

A technology of wastewater treatment system and shunt system, applied in water/sewage multi-stage treatment, oxidized water/sewage treatment, water/sludge/sewage treatment, etc. Sludge increase and other problems, to avoid waste, improve treatment efficiency and reuse utilization, and reduce sludge sedimentation.

Pending Publication Date: 2017-03-22
上海铱钶环保科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a new treatment idea for the removal of PAM in the PAM-containing tailings wastewater treatment circulation system. First, ozone pre-oxidation is used to make the PAM macromolecule open-loop and chain-broken, and transform into a simple Small molecular organic matter creates favorable conditions for subsequent coagulation and flocculation, and solves the technical problems of high operating costs for PAM removal, increased sludge volume, and increased chemical and salt content in treated wastewater that cannot be reused

Method used

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Embodiment 1

[0025] see Figure 1-3 , the present invention is based on the fact that the COD treatment load of the wastewater is not high and the biodegradability is poor. Therefore, the physical and chemical treatment is selected in the subsequent process of ozone treatment, that is, the combined process of ozone pre-oxidation + coagulation sedimentation + sand filtration, to ensure that the effluent is stable and meets the water quality requirements of circulating water , to achieve wastewater reuse. The whole process adopts feedback mechanisms such as viscosity, turbidity, and ozone concentration in water to realize automatic control of chemical dosage, which is conducive to a virtuous cycle of water reuse.

[0026] The process flow of ozone + coagulation sedimentation + sand filtration process combination treatment for the reuse of PAM tailings wastewater is as follows:

[0027] The tailings wastewater containing PAM mainly comes from ore separation process drainage, tailings pond ov...

Embodiment 2

[0045] The original tailings reuse water of an aluminum mine factory contains polyacrylamide, which is reused after simple coagulation and sedimentation treatment, which often blocks the equipment pipeline system, increases the frequency of equipment cleaning and the work intensity of workers, and affects the production efficiency of the enterprise. To this end, we took water samples from the plant for small-scale experiments, and after several process combinations and comparisons, we finally selected the combined process of ozone pre-oxidation + coagulation sedimentation + sand filtration. Under the weakly alkaline pH value of tailings effluent, add ozone 1-4mg / L, react for 30 minutes, measure the viscosity in the water with a viscometer, control the viscosity within 1mPa·s, and add 120mg of PAC to the effluent into the coagulation reaction tank / l, depending on the size of the alum, adjust the dosage of PAC in real time or add a small amount of PAM to aid coagulation. After p...

Embodiment 3

[0050] The flooding wastewater of an oilfield contains a large amount of PAM. The wastewater has high viscosity, high oil content, and poor biodegradability. There is an oil separation-coagulation sedimentation treatment system in the field. Due to the continuous aging of the equipment, the environmental protection requirements are more stringent. The existing facilities The requirements could not be met, so the existing wastewater treatment facilities were upgraded. After careful analysis of the existing water quality and several small tests, and on the basis of making full use of the existing wastewater treatment facilities, the optimized design decided to adopt: oil separation sedimentation, ozone oxidation pretreatment and biochemical treatment processes, and the final treatment effluent is recycled.

[0051] The upgrading process is as follows:

[0052] After the oilfield flooding wastewater is collected into the regulating tank, it is first treated with oil separation an...

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Abstract

The invention relates to an ozone shunting system in a PAM-containing wastewater treatment system. The ozone shunting system comprises a control unit, an ozone source, an ozone oxidation device and a surplus ozone flow adjusting device. A main ozone source channel is communicated with the ozone oxidation device, and a surplus ozone channel is communicated with a reusing water pipe after wastewater is completely purified; an ORP instrument electrically connected with the control unit and used for monitoring oxidation-reduction potential in real time in reusing water is arranged at the position, located behind the connecting part of the surplus ozone channel, on the reusing water pipe, and the control unit adjusts the opening degree of the surplus ozone flow adjusting device in real time according to the real-time monitoring data of the ORP instrument, According to the ozone shunting system, a water body after treatment is sterilized through surplus ozone; meanwhile, the oxidation-reduction potential in water after ozone is sterilized is subjected to real-time online monitoring so that whether the ozone is excessive or not can be judged, the flow of the ozone for sterilization is further automatically adjusted, oxidation and corrosion of a pipe are avoided, the surplus ozone is also fully used, and waste is avoided.

Description

technical field [0001] The invention relates to a wastewater treatment system, specifically an ozone shunt system in a PAM-containing wastewater treatment system, and belongs to the technical field of PAM-containing wastewater treatment. Background technique [0002] The ore pulp of the mineral processing enterprise needs to be concentrated and separated again after the ore washing operation. Sometimes, due to the change of ore properties, the ore pulp is difficult to settle in the thickener, and the thickener runs muddy, so that the concentration and fineness of the pulp in the carbon leaching system do not meet the standard, and the tailings The grade exceeds the standard, which seriously affects the production and wastes useful tailings components. In order to avoid the above problems, many domestic concentrators usually add a large amount of polyacrylamide (PAM) during the flotation process and tailings water treatment to accelerate the pulp settlement and concentration ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F101/38
CPCC02F1/50C02F1/56C02F1/78C02F2101/38
Inventor 连会丽邱真真
Owner 上海铱钶环保科技有限公司
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