Urban sewage disposal system and method based on magnetic enhancement and coagulation separation

A technology for urban sewage and treatment systems, applied in the direction of flocculation/sedimentation water/sewage treatment, water/sewage treatment, chemical instruments and methods, etc., can solve problems such as unstable effluent quality, poor solid-liquid separation effect, and small processing capacity , to achieve the effect of improving sewage treatment efficiency, reducing planned land area, and stabilizing effluent water quality

Pending Publication Date: 2018-07-20
BGRIMM MACHINERY & AUTOMATION TECH CO LTD +1
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  • Summary
  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the small solid-liquid density difference, there are problems such as long hydraulic retention time, small processing capacity per unit area, and poor solid-liquid separation effect, which have become the bottleneck of the existing sewage treatment capacity expansion and standard upgrading operations. The comprehensive removal efficiency of nitrogen, phosphorus and other pollutant indicators fluctuates greatly with seasons, resulting in low treatment efficiency of existing sewage treatment units, large floor area, unstable effluent quality, and even some effluent indicators are difficult to reach the design value

Method used

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  • Urban sewage disposal system and method based on magnetic enhancement and coagulation separation

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specific Embodiment approach

[0023] The municipal sewage treatment method based on magnetically enhanced coagulation separation of the present invention, its preferred embodiment is:

[0024] Include steps:

[0025] First, the sewage is magnetized, and the pipeline pre-magnetizer is used to realize the pre-magnetization of the sewage, so as to strengthen the electrical neutralization of the suspended particles in the subsequent process;

[0026] The pre-magnetized sewage enters the coagulation tank, and the suspended pollutants in the sewage are formed into magnetic agglomeration flocs by filling the coagulation tank with magnetic seeds, flocculants and coagulants;

[0027] The magnetically agglomerated sludge flocs in the water settle efficiently in the magnetic accelerated sedimentation equipment, and are separated from the clear water overflowing from the upper layer;

[0028] The clarified water is effluent, and part of the settled sludge is returned to the coagulation tank through the sludge return ...

specific Embodiment

[0037] It mainly includes sewage pre-magnetization-magnetic seed loading sludge coagulation-screw magnetic field accelerated sludge floc precipitation-magnetic seed and sludge high-speed shear separation-multi-pole alternating magnetic field efficient recovery of magnetic seed-magnetic oscillation magnetic seed demagnetization- Magnetic seeds are re-dosed for recycling.

[0038] First, the sewage is magnetized, and the pipeline pre-magnetizer is used to realize the pre-magnetization of the sewage to strengthen the electrical neutralization of the suspended particles in the subsequent process; the pre-magnetized sewage enters the coagulation tank, and the magnetic seeds are added to the coagulation tank , flocculants, and coagulants to realize the formation of magnetic agglomerated flocs from suspended pollutants in sewage; the magnetically agglomerated sludge flocs in water settle efficiently in the sedimentation equipment with magnetic accelerated sedimentation, and are separa...

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Abstract

The invention discloses an urban sewage disposal system and method based on magnetic enhancement and coagulation separation. The system includes a pipe-type pre-magnetizer, a coagulating pond, a magnetic sedimentation accelerating equipment, a high-speed shearing machine, a magnetic separator special for magnetic seed recovery and a pipe-type demagnetizer which are connected with one another in sequence. The disposal method mainly includes the steps of pre-magnetization of sewage, loading of magnetic seeds for coagulation of sludge, sedimentation acceleration of flocculating sludge constituents through a spiral magnetic field, high-speed shearing separation of the magnetic seeds from the sludge, efficient recovery of the magnetic seeds through a multipole alternating magnetic field, magnetic oscillation for demagnetization of the magnetic seeds, and reloading of the magnetic seeds for recycling. Through full-process coverage of a magnetic technology, fast sedimentation of micro-fine granular suspended solids and efficient reuse of the magnetic seeds are achieved, the hydraulic sedimentation standing time is greatly shortened, the sewage disposal efficiency is improved, and the quality of discharged water is stabilized; all-weather efficient reduction of total phosphorus and other pollutants is achieved, loads of a secondary disposal process are alleviated, the planned floor area is obviously reduced, and the operation cost is decreased.

Description

technical field [0001] The invention relates to an urban sewage treatment technology, in particular to an urban sewage treatment system and method based on magnetically enhanced coagulation separation. Background technique [0002] Urban sewage generally contains organic pollutants (COD, BOD5), a large amount of suspended solids (SS), and is rich in nitrogen and phosphorus elements (TN, TP). Generally, it must be collected into sewage treatment plants. Through physical, chemical, physical Chemical and biological methods for treatment. [0003] Urban sewage treatment plants or reclaimed water plants mostly use coagulation sedimentation combined with biological methods for treatment. The coagulation sedimentation process utilizes the characteristic that the density of suspended solids is higher than that of water, and realizes solid-liquid separation through natural sinking. However, due to the small solid-liquid density difference, there are problems such as long hydraulic r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/12C02F1/52C02F1/56
CPCC02F1/488C02F1/52C02F1/56
Inventor 成磊王晓明史佩伟冉红想彭欣苓胡永会尚红亮朱道瑶
Owner BGRIMM MACHINERY & AUTOMATION TECH CO LTD
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