Magnetic flocculation separation waste water treatment technology

A technology of wastewater treatment and process method, which is applied in the direction of flocculation/sedimentation water/sewage treatment, magnetic field/electric field water/sewage treatment, etc. It can solve the problems of inability to handle dispersed oil and emulsified oil, increased load on high-speed filters, and inability to decolorize, etc. problems, to achieve the effect of reducing investment and land occupation, reducing land occupation, and simplifying the process

Active Publication Date: 2007-02-14
SCIMEE TECH & SCI CO LTD
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Problems solved by technology

[0003] However, there are still some shortcomings in the above process: (1) The effluent water quality index of the magnetic separation equipment can only reach SS≤50mg/l, and the oil is less than 8-10mg/l. High-speed filtration must be set up in the follow-up to reduce the SS to about 20mg/l ; (2) Although non-magnetic substances can be remove

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  • Magnetic flocculation separation waste water treatment technology

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Embodiment Construction

[0017] The process of the present invention will be further described below in conjunction with the accompanying drawings.

[0018] Firstly, the waste water enters the swirl well (1), where the coarse particles are removed by sedimentation and the slick oil recovery device, and then the waste water is pumped into the magnetic separation equipment (3); the waste water enters the pipeline before the magnetic separation device In the process, the inorganic polymer flocculant and the organic polymer coagulant or a composite flocculant of the two are added through the dosing device (8), and the static pipeline mixer (2) is used for thorough mixing to produce flocs. If the inorganic polymer flocculant and the organic polymer coagulant are added separately, the former dosing port is set in front of the pump, and the latter dosing port is set in front of the static pipeline mixer, and the time it takes for the wastewater to pass through the second dosing port 5 to 30 seconds; if the c...

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Abstract

The magnetically flocculating and separating waste water treating apparatus consists of mainly eddy flow well, static tubular mixer, magnetic separator, regulating pond, cooling tower, cooling pond and other parts. It has also chemical adding device before the magnetic separator for throwing flocculant and flocculant aid or complex flocculant, which is mixed into the waste water so as to demulsify oil in the waste water, combine oil and fine non-magnetic matter with flocculant. Through further magnetic separation, the purified water can reach SS less than 20 mg/l and oil less than 5mg/l, is colorless and transparent, and may be reused.

Description

Technical field [0001] The invention belongs to the field of waste water treatment, and in particular relates to a process method for treating waste water by means of chemical flocculation and permanent magnetic separation. Background technique [0002] Wastewater produced in the production process of metallurgical, mining and other enterprises contains magnetic suspended solids and various oils to varying degrees. If not treated, it will cause environmental pollution and waste precious water resources. In order to solve this problem, traditional methods use swirl wells, advection or inclined plate sedimentation tanks, high-speed filters, cooling towers, cold water pools, and the final user recycling process. Precipitation improves the treatment effect. Traditional craft structures require large investment, occupy a lot of land, and the sludge is not easy to handle. Later, the rare earth permanent magnetic separation equipment was used to replace the advection tank or the ...

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Application Information

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IPC IPC(8): C02F1/52C02F1/48
Inventor 倪明亮
Owner SCIMEE TECH & SCI CO LTD
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