High-concentration suspended substance electric-flocculation/floc separation precipitation integrated treatment device

A treatment device and high-concentration technology, applied in water/sewage treatment, water/sludge/sewage treatment, vehicle washing facility wastewater treatment, etc. problems, to achieve the effect of improving the solid-liquid separation effect, high utilization of the device space, and ensuring the treatment effect.

Active Publication Date: 2016-06-22
CHANGJIANG RIVER SCI RES INST CHANGJIANG WATER RESOURCES COMMISSION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The inventors of the present application found in the process of realizing the present invention that there are some shortcomings in the existing electrocoagulation treatment device: the residence time of the wastewater between the electrodes is short, and the suspended solids are not in sufficient contact with the active substances produced by anode electrolysis; Flocculation between groups of electrodes, the processing capacity is small, and multiple flocculation purification after multiple groups of electrodes are used together is not considered enough; high-concentration suspended solids and their flocs in the electrocoagulation reaction zone are easy to deposit, and the electrodes are easy to passivate and aging, and the electrode protection is relatively poor. Inadequate; electrocoagulation, floc separation and precipitation are mostly carried out in a separate device, the process is cumbersome, and the space utilization rate is not high; the digital management level of electrocoagulation is low, and the flocculation process cannot be controlled in real time according to the influent flow rate and the treatment effect of suspended solids

Method used

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  • High-concentration suspended substance electric-flocculation/floc separation precipitation integrated treatment device
  • High-concentration suspended substance electric-flocculation/floc separation precipitation integrated treatment device
  • High-concentration suspended substance electric-flocculation/floc separation precipitation integrated treatment device

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Effect test

Embodiment 1

[0041] Embodiment 1: Stone processing wastewater treatment

[0042] Collect a certain stone processing wastewater and use the prototype product of this device for continuous treatment. The concentration of influent suspended solids is 2812mg / L, and the flow rate is 1.82m 3 / h, the working current intensity is 0.06A / m 2 , the concentration of suspended solids in the effluent after treatment is reduced to 52mg / L, which is lower than the 100mg / L stipulated in the first-level discharge standard of the "Integrated Wastewater Discharge Standard" (GB8978-1996), the removal rate of suspended solids reaches 98.15%, and the energy consumption is about 0.20 yuan / ton of water. After flocculation, the particle size of high-concentration suspended solids changed significantly, specifically, the large particle components decreased, and the overall particle size became smaller. After flocculation, the median particle size decreased from 35.5 μm to 7.21 μm (Table 1).

[0043] Table 1 The ...

Embodiment 2

[0046] Example 2: Treatment of sand and gravel aggregate processing wastewater

[0047] Collect sand and gravel aggregate processing wastewater (concentration about 10,000 mg / L) from a hydropower station after primary sedimentation, and use the prototype product of this device for continuous treatment. Using the method of adding water to dilute, set the concentration range of influent suspended solids to 2500mg / L-10000mg / L, and the working current intensity is 1.82m 3 / h, the current intensity is 0.06A / m 2 , after treatment, see Table 2 for the concentration and median particle size of effluent suspended solids. It can be seen from Table 2 that the device can treat the sand and gravel aggregate processing wastewater to the first-level discharge standard of the "Integrated Wastewater Discharge Standard" (GB8978-1996). Under this working current intensity, the cost of electrolysis energy consumption does not exceed 0.30 yuan / ton.

[0048] Table 2 Electrocoagulation treatment ...

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Abstract

The invention provides a high-concentration suspended substance electric-flocculation/floc separation precipitation integrated treatment device which comprises a flocculation purifier and a controller connected with the flocculation purifier, wherein the flocculation purifier is a cone-cylinder container of which the upper part is a cylinder and the lower part is a cone; a flocculation reaction region positioned in the cylinder region, a floc separation region and a floc precipitation region positioned in the cone region are arranged in the flocculation purifier; a water body guide tank and a plurality of electric-flocculation electrode sheet sets connected in series are arranged in the flocculation reaction region; the water body guide tank guides the water body to sequentially flow through the electrode sheet sets to perform multiplex flocculation; the upper part of the flocculation reaction region is provided with an air compressor and a water inlet pipe; and the controller is used for controlling the flow rate of the influent water and the working parameters of the electrolysis electrodes. The device has the advantages of compact structure, continuous process and high space utilization ratio, prolongs the contact time between high-concentration suspended substances and active substances generated by the electrolytic anode, and ensures the high-concentration suspended substance treatment effect.

Description

technical field [0001] The invention relates to the field of water resource protection and water environment treatment, in particular to an integrated treatment device for high-concentration suspended matter electrocoagulation and floc separation and precipitation. Background technique [0002] Suspended matter refers to fine water particles with a particle size of less than 62 μm, mainly composed of sediment, clay, protozoa, algae, bacteria, viruses, and high-molecular organic matter, which form flocs and settle with water transport. Suspended solids in water bodies are closely related to water resources, water environment and aquatic ecology. The increase in the concentration of suspended solids leads to a series of changes in the physical, chemical and biological characteristics of the water body. The more common adverse effects include the decline in the aesthetics of the water body landscape, the increase in water treatment costs, the decline in fishery resources, and t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/463C02F103/44
CPCC02F1/463C02F2103/44
Inventor 汤显强黎睿李青云
Owner CHANGJIANG RIVER SCI RES INST CHANGJIANG WATER RESOURCES COMMISSION
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