Additional electric field reinforced circulating type internal electrolysis device

A technology of additional electric field and internal electrolysis, applied in chemical instruments and methods, water/sewage treatment, water/sludge/sewage treatment, etc., can solve problems such as the decline of treatment effect, strengthen the ability to treat industrial wastewater, alleviate the hardening , the effect of removing organic pollutants

Inactive Publication Date: 2013-04-24
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to focus on overcoming the defects of the prior art, especially facing the current situation that the internal electrolytic method filler presents problems such as compaction, channeling and passivation of iron materials in the application, which lead to the decline of the treatment effect, and designs an additional electric field enhanced circulation type Internal electrolysis device

Method used

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  • Additional electric field reinforced circulating type internal electrolysis device
  • Additional electric field reinforced circulating type internal electrolysis device
  • Additional electric field reinforced circulating type internal electrolysis device

Examples

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Effect test

Embodiment 1

[0025] The wastewater leachate from a sewage reservoir is treated with an enhanced circulation internal electrolysis device. The characteristics of the wastewater are: dark yellow in appearance, with a chroma of about 1000 dilution times; COD=1200-1500mg / L; BOD 5 / COD=0.05~0.07; pH=5~6; SS=500~700mg / L; TDS=1700~1800mg / L; Cl-=7485-7615mg / L, conductivity=18000~19000μs / cm. The traditional internal electrolysis reactor (no circulation, no additional voltage, cast iron chips as iron filler) and the additional electric field enhanced circulation type internal electrolysis device (circulation backflow, additional voltage, sponge iron filler) run for 12 hours under the same conditions, and the COD removal rate Respectively 21% and 55%; chroma removal rates were 60% and 90%; BOD 5 / COD increased to 0.26 and 0.42 respectively (Wastewater biochemical conditions: BOD 5 / COD greater than or equal to 0.4). After 30 days of continuous operation, the iron / carbon packing of the traditional i...

Embodiment 2

[0027] Acid red 333 dye wastewater is treated with an enhanced circulation type internal electrolysis device. The characteristics of the wastewater are: the appearance is dark red, the chromaticity is about 2000 dilution times; COD=1200~1500mg / L; BOD 5 / COD=0.12~0.18; SS=0.38~0.44g / L; pH=5.5~7.5; the traditional internal electrolysis reactor and the additional electric field enhanced circulation internal electrolysis device run for 5 hours under the same conditions, and the COD removal rates are 30 % and 75%, BOD 5 / COD increased to 0.20 and 0.52 respectively; chromaticity removal rates can reach 50% and 90% respectively; after 15 days of continuous operation, the effluent water quality of the traditional internal electrolysis reactor fluctuated and showed a trend of deterioration, while the additional electric field strengthened the circulating internal electrolysis device The effluent quality remains stable.

[0028] It can be seen that, compared with the traditional intern...

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Abstract

The invention discloses an additional electric field reinforced circulating type internal electrolysis device and belongs to the industrial wastewater processing field. The device comprises a filler tower, a refluxing tank and electrode pairs, wherein the filler tower comprises a water inlet, a refluxing liquid inlet, a water distribution layer and a gas distribution system, the middle of the filler tower is provided with a supporting layer, the filler is divided into an upper layer and a lower layer, and the upper portion of the filler tower is provided with annular overflow weirs and a water outlet; the refluxing tank is provided with a water outlet, an aeration system, (two layers of) porous plates, and an upper portion water inlet / outlet; and one or more groups of the electrode pairs are arranged in the filler layer. The device is characterized in that the filler is maintained in a suspension state under the cooperation of a circulating water flow and the aeration promotion, and the deposit hardening and pollution are avoided through removing the deposit enriched in the filler by means of the shearing force of the water flow; passivation is alleviated through constructing the different oxygen environments of the internal layer and the external layer by treating honeycomb-shaped spongy iron as an iron material; and the addition of a proper electric field to the filler accelerates the mobility of electrons between the filler, and reinforces the primary batteries series redox reaction, so the device disclosed in the invention has a higher effectiveness than traditional internal electrolysis devices in the industrial wastewater processing.

Description

technical field [0001] The invention belongs to the field of treating refractory industrial waste water, and its content relates to a new type of additional electric field enhanced circulation type internal electrolysis device. Background technique [0002] The internal electrolysis method is a wastewater treatment technology that uses elemental iron and activated carbon as fillers to form a filter, and the wastewater undergoes a series of electrochemical and physical chemical reactions through the filter, resulting in the treatment of organic pollutants. Using this method to treat wastewater can reduce its COD Cr , remove chroma, improve the biodegradability of wastewater. The principle is to use iron and activated carbon to form a tiny primary battery, and form an electric field in space, that is, the iron anode loses electrons to generate Fe 2+ , electrons flow into the carbon cathode to form OH - And the new ecology [H], at the same time, it also has the functions of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/461
Inventor 文晨杨志清王亮赵斌张朝晖余曦张贺
Owner TIANJIN POLYTECHNIC UNIV
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