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High-voltage pulse electrode system for deep dehydration of sludge by electrolytic treatment

An electrode system, high-voltage pulse technology, applied in electrochemical sludge treatment, sludge treatment, water/sludge/sewage treatment, etc., can solve the problem of incapable of destroying cell membranes and cell walls and releasing micellar water.

Pending Publication Date: 2018-07-24
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Restricted by Ohm's law, pulse electrolysis treatment of sludge generally does not exceed 100V in a single tank, which cannot meet the purpose of destroying the cell membrane and cell wall to release micellar water; at the same time, at a voltage greater than 30V, electrolysis generates a large current, causing electrolysis. Sludge generates a lot of heat

Method used

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  • High-voltage pulse electrode system for deep dehydration of sludge by electrolytic treatment
  • High-voltage pulse electrode system for deep dehydration of sludge by electrolytic treatment
  • High-voltage pulse electrode system for deep dehydration of sludge by electrolytic treatment

Examples

Experimental program
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Effect test

Embodiment 1

[0019] refer to figure 1 , an electrode system for high-voltage pulse electrolytic treatment of sludge, including a high-voltage pulse anode 1 and a high-voltage pulse cathode 2, the conductive anode plate A is an ordinary stainless steel plate, the specification is 0.5m*0.4m; the anode outer lining insulation layer B is poly Acrylic material, the thickness X of the anode insulating plate is 0.5cm. The conductive cathode plate C is made of red copper material with a specification of 0.5m*0.4m; the outer lining insulating layer D of the cathode is made of polypropylene material, and the thickness Y of the cathode insulating plate is 1.5cm. The high-voltage pulse power supply is negative pulse, the voltage range is 0-60kV, and the frequency is 50Hz. The connecting wires are led out from the anode and the cathode respectively, and are respectively connected to the positive pole and the negative pole of the pulse power supply, wherein the positive pole is grounded while connectin...

Embodiment 2

[0021] device component reference figure 2 . Schematic diagram of the layout of the high-voltage pulse electrode system of the bipolar electrolytic cell. The anode metal plate 5, the insulating wall plate E on one side of the electrolytic cell, the cavity of the electrolytic cell 9, the insulating wall plate F on the other side of the electrolytic cell, and the bipolar metal plate 7 to form a unit electrolyzer 8. The three electrolyzers 8 form a bipolar electrolyzer. The anode metal plate 5, the cathode metal plate 6 and the bipolar metal plate 7 are metal titanium plates with a thickness of 2 mm, the thickness of the insulating wall plate E is 1.5 cm, the thickness of the insulating wall plate F is 1.5 cm, and the cavity of the electrolytic cell is 5 cm. Pump biochemical sludge with a water content of 98% into the chamber 9 of the electrolytic cell, treat it with a pulse voltage of 40kV for 5 minutes, take out the sludge, and then undergo a 0.5MPa filter press dehydration ...

Embodiment 3-6

[0024] refer to figure 2 . Adjust the thickness X of the anode insulating layer and the thickness of the cathode insulating layer Y so that (X+Y) are 1cm, 2cm, 4cm, 6cm, and 8cm respectively, and the pulse voltage is adjusted to near the breakdown voltage. The sludge was treated according to the method of Example 1. The moisture content of the obtained sludge is shown in Table 1 below.

[0025] Table 1 Electrode systems with different thicknesses of insulating layer to treat sludge

[0026]

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Abstract

The invention discloses a high-voltage pulse electrode system for deep dehydration of sludge by electrolytic treatment. The high-voltage pulse electrode system is characterized in that an electrode system anode and an electrode system cathode are both composite electrodes made of outer lining electric insulating materials, wherein each composite electrode is formed by compounding a conductive polar plate and an insulating polar plate. The limiting operating voltage U of high-voltage pulse treatment sludge can be adjusted according to the thickness of the outer lining electric insulating material for preparing the electrode system and accords with a relational expression that U is equal to K(X+Y), wherein X and Y are the thicknesses of the outer lining electric insulating materials for preparing the cathode and the anode, and K is a constant relating to the insulating material, an electrolytic medium and electrode spacing. The electrode system is applied to sludge dehydration; the problem of lower bath voltage because electrodialysis is limited by sludge resistance can be solved; electrolytic treatment of a unit electrolytic bath with the bath voltage of 0.5 to 60kV is realized; thewater content is reduced by 20 to 35 percent by the sludge dehydrated through mechanical filter pressing.

Description

(1) Technical field [0001] The invention relates to a high-voltage pulse electrode system for deep dehydration of electrolytic treatment sludge, which is an electrode material used in an ultra-high-voltage pulse electrolytic treatment sludge device, and belongs to the field of solid waste treatment. (2) Background technology [0002] With the rapid development of industry and cities, the treatment and disposal of sludge in sewage treatment plants has become an increasingly serious problem. At present, the sludge dehydration methods of urban sewage treatment plants are centrifugation, pressing, etc. This mechanical dehydration method can only remove the moisture content of sludge to 80%. It does not meet the national requirement that the sludge must be dewatered to a water content below 50%. Therefore, deep dehydration of sludge is required. [0003] The deep dehydration of sludge is the key link of sludge treatment and disposal. The relationship between the degree of comb...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/00C02F11/12
CPCC02F11/006C02F11/122C02F11/127
Inventor 甘永平王家德张文魁黄辉梁初夏阳张俊饶祎王奕顺
Owner ZHEJIANG UNIV OF TECH