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Electrochemical method and device for continuous and fast water treatment

An electrochemical and rapid technology, which is applied in chemical instruments and methods, water/sewage treatment, flotation water/sewage treatment, etc., can solve the problem of excessive deposition of electrode plates and conductive plates, increased resistance between electrodes, and air flotation. Effect reduction and other problems, to achieve the effect of more mutual contact and collision opportunities, uniform distribution and flow, and avoid adverse effects

Inactive Publication Date: 2005-01-19
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the electrochemical method of purifying water and wastewater is mainly based on the separate functions of electrocoagulation, electroflotation and redox, and the consumption of soluble electrodes is large, and the treatment effect is limited.
The electro-coagulation flotation equipment researched and developed in recent years has realized the synergy of electrocoagulation and electric flotation, but there are many deposits on the electrode plates and conductive plates and it is difficult to remove them by hydraulic scouring, so that the resistance between electrodes gradually increases. increase, which weakens the treatment effect under the same power; the back-and-forth mechanical deflection tends to gradually increase the particle size of the dissolved air bubbles in the water, resulting in a decrease in the air flotation effect

Method used

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  • Electrochemical method and device for continuous and fast water treatment
  • Electrochemical method and device for continuous and fast water treatment
  • Electrochemical method and device for continuous and fast water treatment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Embodiment 1. Treatment domestic sewage test

[0018] The result of using the device of this invention to treat a certain domestic sewage is shown in Table 1.

[0019] Surfactant

(LAS) (mg / l)

COD

(mg / l)

Turbidity

(NTU)

Conductivity

(μs)

pH

Chroma

(fold)

water temperature

(℃)

Water quality before treatment

43.1

868.5

159

790

8.13

170

10.5

Water quality after treatment

6.6

30.7

12.7

605

8.17

10

12.2

Removal rate

84.1％

96.5％

92％

94.1％

[0020] Test conditions: V=61.5v, I=2.2A, flow=100l / h,

[0021] Hydraulic retention time (HRT) = 1min; water recovery rate: 75%

Embodiment 2

[0022] Embodiment 2. Treatment mechanical processing sewage test

[0023] The result of using the device of this invention to treat a certain mechanical processing sewage is shown in Table 2.

[0024] Surfactant

(LAS) (mg / l)

COD

(mg / l)

Turbidity

(NTU)

Conductivity

(μs)

pH

Chroma

(fold)

water temperature

(℃)

Water quality before treatment

52.1

1240

270

763

8.13

160

13.7

Water quality after treatment

13.2

116

8.3

582

8.29

7

14.5

Removal rate

74.7％

90.6％

96.9％

95.6％

[0025] Test conditions: V=75v, I=2.25A, flow=100l / h,

[0026] Hydraulic retention time (HRT) = 1 min, water recovery rate; 75%.

Embodiment 3

[0027] Embodiment 3. Treatment of mixed sewage test of mechanical processing drainage and domestic drainage

[0028] The results of using the device of the invention to treat the mixed sewage of a certain mechanical processing drainage and domestic drainage are shown in Table 3.

[0029] Surfactant

(LAS) (mg / l)

COD

(mg / l)

Turbidity

(NTU)

Conductivity

(μs)

pH

Chroma

(fold)

water temperature

(℃)

PO 4 3-

(mg / l)

Water quality before treatment

40.3

309.7

160

794

8.07

170

14.3

8.2

Water quality after treatment

8.1

26.7

3.8

572

8.18

10

15.2

/

Removal rate

79.9％

91.4％

97.6％

94％

100％

[0030] Test conditions: V=61v, I=2.2A, flow=100l / h,

[0031] Hydraulic retention time (HRT) = 1 min, water recovery rate; 75%.

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Abstract

The invention discloses a continuous quick-speed water treatment method by employing a enclosed type electrochemical reactor which comprises at least three identical electrochemical units, wherein the electrochemical reactor is provided with a water intake port and a water outlet port on the bottom and on the top, the water outlet port is connected to a water flow control valve directly, each of the electrochemical unit comprises a square column, an adapting flange, a water distribution board, a plurality of plate electrodes and conductive plates. The electrochemical unit at least comprises a pair of insoluble electrodes, at least a conductive plate unit is arranged between the anode and the cathode. The method realizes ideal effect for removing the surface-active agents in the waste water.

Description

field of invention [0001] The invention relates to a continuous and rapid treatment method and device for water and waste water, specifically utilizing the synergistic effect of electrocoagulation, electric floatation, electrochemical oxidation and the soft "S"-shaped channel designed by the invention to purify water and waste water. Background technique [0002] At present, the electrochemical method of purifying water and wastewater mainly utilizes the separate functions of electrocoagulation, electroflotation and redox, and the consumption of soluble electrodes is large, and the treatment effect is limited. In recent years, the electroaccumulation flotation equipment researched and developed has realized the synergy of electrocoagulation and electric flotation, but the deposition on the electrode plate and the conductive plate body is more and difficult to remove by hydraulic scouring, so that the resistance between the electrodes gradually increases. The increase will we...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/461C02F1/463C02F1/465
Inventor 曲久辉刘红雷鹏举葛建团
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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