CN105236626A

CN105236626A - Multi-stage microelectrolysis-Fenton reaction device for modular iron-carbon filler and application method thereof

Info

Publication number: CN105236626A
Application number: CN201510607591.3A
Authority: CN
Inventors: 张毅; 王伟; 吴京; 王伟民; 朱伟; 李秀霞
Original assignee: Nanjing Institute of Environmental Sciences MEP
Current assignee: Nanjing Institute of Environmental Sciences MEP
Priority date: 2015-09-22
Filing date: 2015-09-22
Publication date: 2016-01-13
Anticipated expiration: 2035-09-22
Also published as: CN105236626B

Abstract

The invention discloses a multi-stage microelectrolysis-Fenton reaction device for a modular iron-carbon filler and an application method thereof, belonging to the field of environment-friendly water treatment. The device comprises a wastewater inlet pump, an H2O2 feeding unit and a pipeline mixer, and also comprises a microelectrolysis-Fenton reaction unit, wherein the water inlet pump and the H2O2 feeding unit are in connection; the H2O2 feeding unit and the pipeline mixer are in connection; the pipeline mixer and the multi-stage microelectrolysis-Fenton reaction unit are in connection; the multi-stage microelectrolysis-Fenton reaction unit has square-shaped appearance; the interior of the multi-stage microelectrolysis-Fenton reaction unit is divided into four units along the middle point of opposite edges; the four units comprise two multi-stage microelectrolysis units, one oxidation flocculation unit and one sedimentation unit; the two multi-stage microelectrolysis units are in connection and are connected with the oxidation flocculation unit; and the oxidation flocculation unit is connected with the sedimentation unit. The multi-stage microelectrolysis-Fenton reaction device provided by the invention solves the problems of easy passivation and difficult replacement of the iron-carbon filler, incomplete decoloring of the wastewater, easy blockage of aeration holes and difficult precipitation of flocculating constituents.

Description

A kind of multistage light electrolysis-Fenton's reaction device of module type iron carbon filler and using method thereof

Technical field

the present invention relates to the purifying treatment engineering as industry waste water such as printing and dyeing, chemical industry, plating, agricultural chemicals, coking, belong to environment-protective water process field, be specifically related to a kind of multistage light electrolysis-Fenton's reaction device and using method thereof of module type iron carbon filler.

Background technology

Iron-carbon micro-electrolysis and Fenton oxidation technology are two kinds of different wastewater processing technologies, independentuse the treatment of Organic Wastewater that all can be used for high density, difficult for biological degradation, biodegradability difference.

Iron-carbon micro-electrolysis is in acid condition, when waste water fully contacts with iron-carbon micro-electrolysis filler, forms galvanic effect (difference in Electrode Potential 1.2V), in containing the aqueous solution of acidic electrolyte bath, electrochemical reaction occurs in waste water between iron and carbon.The nascent state atom [H] that reaction produces and Fe ²⁺etc. can with the many component generation redox reactions in waste water, can reach and make that waste water COD reduces, BOD raises, biodegradability (B/C) improves and the effect such as waste water decoloring.

Fenton's reaction is under pH is less than the acidic conditions of 4, by Fe ²⁺and H ₂o ₂mix and obtain the very strong OH of oxidation capacity (oxidizing electrode current potential 2.80V), thus by the reaction of the pollutant oxidation decomposition in waste water.Have and be swift in response, be oxidized and more thoroughly, not produce the advantages such as secondary pollution.

In summary, the two is all react in acid condition, the Fe produced in iron-carbon micro-electrolysis process ²⁺it is one of major pharmaceutical agent of Fenton's reaction.For these reasons, have gradually and study iron-carbon micro-electrolysis together with Fenton oxidation combine with technique, form a kind of new wastewater treatment high-level oxidation technology---iron-carbon micro-electrolysis-Fenton oxidation technology.In acid condition, the Fe of iron-carbon micro-electrolysis reaction generation ²⁺, with the H added in waste water ₂o ₂generation Strong oxdiative reacts, and has reduced Fenton's reaction Fe ²⁺dosage, improves the processing power of device to pollutent.

But mainly there is following problem in actual applications, conventional at present iron-carbon micro-electrolysis-Fenton's reaction device:

1). the conventional iron carbon filler profile of use is generally spheroidal, granular, annular or strip, general by physics pressing and forming, do not solidify through high-temperature firing, in using easily softening, Song Hua, be compacted, after long-time running, filling surface easily comes off formation passive film, the suspended particles such as part iron carbon mud are deposited on the filling surface being in bottom gradually, have intercepted filler with the effective of waste water and have contacted, caused waste water treatment efficiency to reduce.

2). in conventional iron carbon micro-electrolysis reactor, filler generally adopts landfill state, and during use, stack up does not have relatively-stationary support structure, and after long-term operation, filler size diminishes, and between filler, porosity declines; The filler of the more heavier mass of upper strata iron content sinks gradually, cause filler distribution in pond uneven while crushing the less filler of lower floor, form cutout or slough, not only affect waste water fluidised form, affecting light electrolysis effect causes processing efficiency to decline, and also makes follow-up replacement difficulty greatly increase.Even if all waste water is cleared up in emptying reactor, if open-assembly time is longer, whole packing layer also may be made all to lump, cause that reactor is whole to be scrapped.

3). in conventional iron-carbon micro-electrolysis-Fenton's reaction device, micro-electrolysis stuffing is deposited in together as one deck, due to back up pad limited load bearing capacities, packing layer thickness is general less, waste water is after light electrolysis layer, continue again to come in contact with iron carbon filler in the process of upwards plug-flow, light electrolysis limited efficiency.

4). in conventional light electrolysis-Fenton's reaction device, mostly in light electrolysis unit, add H ₂o ₂after start to carry out aeration, a large amount of oxygenation can make Fe ²⁺be converted into Fe ³⁺, slow down Fenton's reaction speed, reduce pollutant oxidation effect; But after Fenton oxidation terminates, there is no oxygenic aeration, cause Fe in water outlet ²⁺more, the Fe (OH) formed after adding alkali ₂lighter weight not easily precipitates, and due to residual Fe in waste water ²⁺colour developing causes chroma in waste water higher, and visual sensory is poor.

5). the flocs unit formed after Fenton's reaction, because aeration time is longer, flco surface attachment has a lot of micro-bubble not easily to precipitate, conventional precipitation method poor effect.

Chinese invention patent, publication number: 103880225A, publication date: 2014.6.25, disclose a kind of multistage iron-carbon micro-electrolysis coupling Fenton oxidation bed bioreactor, it is characterized in that it comprises lifting water pump, inlet channel, hydrogen peroxide throwing device, inlet channel mixing tank, distributing water room, multistage iron-carbon micro-electrolysis coupling Fenton oxidation bed bioreactor body, takes material mouth, fe and particle gacmixture layer, water outlet settling section, sieve plate water distribution system, mud discharging mouth, reactor outlet canal, rising pipe and settling tank, settling tank comprises settling tank body, outlet conduit and spoil disposal pipeline.The one that this invention proposes multistage iron-carbon micro-electrolysis coupling Fenton oxidation bed bioreactor, solve traditional coking waste water treatment process to difficult degradation complicated organic pollutant removal effect the undesirable and problem such as cause COD in water outlet, ammonia nitrogen, total nitrogen and colourity not up to standard, the process for the many rings of the difficult degradation in waste water, heterocyclic organism and hazardous and noxious substances is very effective.Its weak point is, 1) hydrogen peroxide throwing device is arranged on inlet channel mixing tank, make can not fully mixing of waste water and hydrogen peroxide, be unfavorable for the light electrolysis that mixing liquid carries out in multistage iron-carbon micro-electrolysis coupling Fenton oxidation bed bioreactor body and Fenton's reaction further; 2) fe and particle gacfor mixture layer, after long-term operation, the filler of the more heavier mass of upper strata iron content sinks gradually, cause filler distribution in mixture layer uneven while crushing the less filler of lower floor, not only affect waste water fluidised form, and affect light electrolysis Fenton's reaction effect, cause processing efficiency to decline; 3) take material mouth and take material level in fe and particle gacthe side of mixture layer, can not ensure uniform filling in the process of reloading, and Waste iron slag will be cleaned out, and stackingly to lump for a long time, forms short stream or slough, otherwise can affect light electrolysis Fenton's reaction effect, be difficult to remove, waste time and energy, take inconvenience; 4) H is added in light electrolysis unit ₂o ₂after, cause Fe in water outlet ²⁺more, the Fe (OH) formed after adding alkali ₂lighter weight not easily precipitates, and due to residual Fe in waste water ²⁺colour developing causes chroma in waste water higher, and visual sensory is poor.

Summary of the invention

1. the problem that will solve

For the easy passivation of filler, the caking of wastewater treatment existence in prior art, there is the phenomenon that Huo Duanliu district, dead band causes light electrolysis Fenton's reaction poor effect in reactor, the present invention proposes a kind of multistage light electrolysis-Fenton's reaction device of module type iron carbon filler and using method thereof, it solve water treatment effect difference, problem that look is returned in water outlet, structure is simple, filler not easily passivation, caking, installs to change convenient, and device Nei Wuduanliu district, dead band produce, and filler Multi-layers distributing, treatment effect in pond are stablized.

2. technical scheme

For solving the problem, technical scheme provided by the invention is:

Multistage light electrolysis-Fenton's reaction device of module type iron carbon filler, comprises wastewater influent pump, H ₂o ₂throwing device and line mixer, it also comprises light electrolysis-Fenton's reaction device, and wherein, described wastewater influent pump is arranged on sewage water inlet pipe, sewage water inlet pipe and described H ₂o ₂after throwing device is communicated with, H ₂o ₂add and be communicated with described line mixer, described line mixer is communicated with described light electrolysis-Fenton's reaction device by pipeline;

Described light electrolysis-Fenton's reaction device comprises four unit, wherein there are two light electrolysis unit, an oxidizing, flocculating unit and a precipitation unit, be communicated with oxidizing, flocculating unit after two light electrolysis unit are connected, oxidizing, flocculating unit is communicated with precipitation unit, described precipitation unit side is provided with rising pipe, is provided with shore pipe bottom described precipitation unit.Described light electrolysis-Fenton's reaction device appearance is square, and inside is equally divided into 4 unit along opposite side mid point; Two light electrolysis unit are in parallel, only use one during normal operation, stop transport when safeguarding and open another unit, can guarantee that device operates continuously.

Preferably, described H ₂o ₂throwing device comprises H ₂o ₂storage tank, H ₂o ₂chemical feed pipe and H ₂o ₂dosing pump; Described H ₂o ₂the bottom of storage tank and H ₂o ₂chemical feed pipe is communicated with, described H ₂o ₂chemical feed pipe is provided with H ₂o ₂dosing pump.

Preferably, described H ₂o ₂chemical feed pipe is inserted into the center position of cross section along the vertical line of sewage water inlet pipe, H ₂o ₂the outlet of chemical feed pipe in sewer line, cuts along water (flow) direction reverse side, and face of tool and water (flow) direction be at 45 ° ~ 60 ° of angles, expansion H ₂o ₂the outlet area of chemical feed pipe, H ₂o ₂distance between the position that chemical feed pipe is communicated with sewage water inlet pipe and line mixer is greater than 300mm, makes H ₂o ₂can mix with sewage.

Preferably, the bottom of described light electrolysis unit is provided with shore pipe, shore pipe is connected with sludge hopper, sludge hopper is provided with aerating apparatus, water-distributing device is provided with above aerating apparatus, 3-6 layer micro-electrolysis reaction layer is provided with above water-distributing device, to increase the duration of contact of waste water and filler, ensure that micro-electrolysis reaction effect, effluent trough is provided with above micro-electrolysis reaction layer, effluent trough bottom right side is provided with rising pipe, aerating apparatus place plane, water-distributing device place plane and micro-electrolysis reaction layer place plane parallel to each other, described water-distributing device is communicated with described line mixer by pipeline, rising pipe in described light electrolysis unit and the center water inlet pipe in oxidizing, flocculating unit.Intake by light electrolysis unit bottom, the effluent trough water outlet on light electrolysis unit top, runs the body refuse produced and discharges from the shore pipe being arranged on light electrolysis unit bottom.

Preferably, NaOH automatic medicament feeding system is provided with above described oxidizing, flocculating unit, NaOH automatic medicament feeding system is by NaOH solution storage tank, NaOH chemical feed pipe and NaOH respond to dosing pump, the bottom of described NaOH solution storage tank is communicated with NaOH chemical feed pipe, described NaOH chemical feed pipe is provided with NaOH and responds to dosing pump, described NaOH chemical feed pipe stretches in the water inlet pipe of center, center water inlet pipe is arranged on the central axis of oxidizing, flocculating unit, the Upper vertical of center water inlet pipe inserts in the effluent trough at oxidizing, flocculating unit top, pH on-line computing model is provided with in effluent trough, described pH on-line computing model and NaOH respond to dosing pump and are connected, effluent trough bottom right side is provided with rising pipe, umbrella shape scatterer is provided with bottom the water inlet pipe of center, the bottom of oxidizing, flocculating unit is provided with aerating apparatus, sludge hopper is provided with below aerating apparatus, shore pipe is provided with below sludge hopper, rising pipe in described oxidizing, flocculating unit is communicated with the center water inlet pipe in precipitation unit.

Preferably, the central axis of described precipitation unit is provided with center water inlet pipe, center water inlet pipe Upper vertical inserts in the effluent trough at oxidizing, flocculating unit top, the side bottom of effluent trough is provided with rising pipe and is communicated with, center water inlet pipe through the swash plate be arranged in oxidizing, flocculating unit, for the flocs unit formed after Fenton's reaction, because aeration time is longer, flco surface attachment has a lot of micro-bubble not easily to precipitate, the phenomenon of conventional precipitation method poor effect; Swash plate is in order to strengthen sedimentation effect; Be provided with umbrella shape scatterer bottom the water inlet pipe of center, bottom precipitation unit, be provided with sludge hopper, below sludge hopper, be provided with shore pipe.

Preferably, described aerating apparatus is identical with water-distributing device structure, be made up of main, arm, arm is arranged on the both sides of main symmetrically and evenly, arm is vertical with main, arm arranges porose on the surface, and the hole on arm and arm cross-section normal direction are that 45 ° of angles are evenly distributed on vertical line both sides.To prevent flco or particulate matter blocking aperture in waste water, the hole of aerating apparatus is used for aeration, and the hole of water-distributing device is used for water distribution.

Preferably, described micro-electrolysis reaction layer is made up of back up pad and module type filler, back up pad is set side by side with module type filler, described module type filler is made up of laminal filler, PVC bracket, described PVC bracket is cuboid-type, built-in draw-in groove, described laminal filler is vertically inserted in draw-in groove, every layer of micro-electrolysis reaction layer has 600 ~ 1800 laminal fillers.

Preferably, it is characterized in that, described center water inlet pipe, diameter is D, and bottom arranges umbrella shape scatterer, 30 °, scatterer corner, bottom lengths is (1.2 ~ 1.5) D, and described sludge hopper front view shape is upside-down trapezoid, and described shore pipe diameter is not less than 200mm.

A using method for the multistage light electrolysis-Fenton's reaction device of module type iron carbon filler, step is:

A. according to mentioned above, the multistage light electrolysis-Fenton's reaction device of a kind of module type iron carbon filler described in structure;

B. review and validate shore pipe and be in closing condition;

C. valve, wastewater influent pump and the H on a rising pipe be communicated with light electrolysis unit is closed ₂o ₂dosing pump, makes the light electrolysis unit in light electrolysis-Fenton's reaction device only have one to can be used in sewage disposal;

D. valve, wastewater influent pump and the H on another rising pipe be communicated with light electrolysis unit is opened ₂o ₂dosing pump, makes the light electrolysis unit in light electrolysis-Fenton's reaction device only have one to can be used in sewage disposal; Open H ₂o ₂dosing pump (2) adds H in sewage ₂o ₂; Sewage enters sewage water inlet pipe through wastewater influent pump, H ₂o ₂h in storage tank ₂o ₂solution is through H ₂o ₂dosing pump, by H ₂o ₂chemical feed pipe is from H ₂o ₂chemical feed pipe face of tool is flowed out, and enter sewage water inlet pipe, collaborate with sewage, both fully mix at line mixer place;

The sewage of outflow conduit mixing tank enters in the water-distributing device in light electrolysis unit, flow into the main on water-distributing device, flow out in the hole arm, along with sewage constantly flows in light electrolysis unit, water level rises, sewage contacts with each micro-electrolysis reaction layer gradually, sewage and laminal filler, namely iron carbon filler fully contacts, in acid condition, generation iron-carbon micro-electrolysis reacts, galvanic effect is formed between iron and carbon in waste water, difference in Electrode Potential is 1.2V, electrochemical reaction is there is in containing the aqueous solution of acidic electrolyte bath, the nascent state atom [H] that reaction produces and Fe ²⁺etc. can with the many component generation redox reactions in waste water, can reach and make that waste water COD reduces, BOD raises, biodegradability (B/C) improves and the effect such as waste water decoloring,

The H added ₂o ₂with the Fe that iron-carbon micro-electrolysis reaction produces ²⁺mix, be less than the acidic conditions of 4 at pH under, there is Fenton's reaction, obtain the very strong OH of oxidation capacity (oxidizing electrode current potential 2.80V), thus by the reaction that the pollutant oxidation in waste water decomposes, have and be swift in response, be oxidized and more thoroughly, not produce the advantages such as secondary pollution;

In summary, iron-carbon micro-electrolysis reaction and Fenton's reaction are all react in acid condition, the Fe produced in iron-carbon micro-electrolysis process ²⁺be one of major pharmaceutical agent of Fenton's reaction, by iron-carbon micro-electrolysis together with Fenton oxidation combine with technique, form a kind of new wastewater treatment high-level oxidation technology---light electrolysis-Fenton oxidation technology, in acid condition, the Fe that iron-carbon micro-electrolysis reaction produces ²⁺, with the H added in waste water ₂o ₂generation Strong oxdiative reacts, and has reduced Fenton's reaction Fe ²⁺dosage, improves the processing power of device to pollutent.

Conventional reactor, does not have oxygenic aeration, causes Fe in water outlet after Fenton oxidation terminates ²⁺more, the Fe (OH) formed after adding alkali ₂lighter weight not easily precipitates, and due to residual Fe in waste water ²⁺colour developing causes chroma in waste water higher, and visual sensory is poor; The present invention had not both had direct aeration, did not add alkali yet, avoided the generation of above-mentioned two situations.

E. H is added ₂o ₂after end, the aerating apparatus of light electrolysis unit was at interval of 45 minutes aerations 10 ~ 15 minutes; And in conventional light electrolysis-Fenton's reaction device, mostly in light electrolysis unit, add H ₂o ₂after start to carry out aeration, a large amount of oxygenation can make Fe ²⁺be converted into Fe ³⁺, and Fe ²⁺be one of major pharmaceutical agent of Fenton's reaction, so just slow down Fenton's reaction speed, reduce pollutant oxidation effect; Interval of the present invention aeration after 45 minutes, can not make Fe ²⁺be converted into Fe ³⁺, the Fe that iron-carbon micro-electrolysis produces ²⁺fenton's reaction speed can be improved, strengthen pollutant oxidation effect.Throw out after the reaction of iron carbon, Fenton's reaction and aeration, the impurity in sewage and throw out all sink in sludge hopper;

In addition, the iron body refuse that falls of one deck micro-electrolysis reaction pull-up, may be attached to the surface of micro-electrolysis reaction layer, therefore intermittent aeration in light electrolysis unit above, with the iron body refuse on desorption micro-electrolysis reaction layer surface, improve the reaction effect of light electrolysis-Fenton device.

F. the aerating apparatus continuous aeration of oxidizing, flocculating unit bottom, gas-water ratio 6 ~ 15:1; In light electrolysis unit with Fe ²⁺sewage flow in the center water inlet pipe of oxidizing, flocculating unit by the rising pipe on effluent trough, entered the bottom of oxidizing, flocculating unit by the umbrella shape scatterer bottom the water inlet pipe of center; By the aerating apparatus entrance of oxidizing, flocculating unit bottom, continuous aeration, gas-water ratio 6 ~ 15:1, by Fe in waste water ²⁺be oxidized to rear Fe ³⁺, remove the colourity of sewage;

G. when waste water level arrives in effluent trough, the pH on-line computing model in effluent trough, the pH value of monitoring waste water, automatically opens NaOH and responds to dosing pump, NaOH solution be added in the water inlet pipe of center, generate floss Fe (OH) when pH is less than 6 ₃, sweep along pollutent to be deposited in sludge hopper further;

Water outlet after light electrolysis-Fenton's reaction enters oxidizing, flocculating unit, adds NaOH and oxygenation continuously, can play following effect: by the Fe remained in waste water ²⁺be oxidized to Fe ³⁺, slough Fe ²⁺colourity, avoids water outlet to return look phenomenon; Make the further oxygenolysis of useless Organic substance in water; Form flocs unit under alkaline condition, aeration plays stirring action.

H. after oxidizing, flocculating cell processing, waste water flows in the center water inlet pipe of precipitation unit by the rising pipe of effluent trough bottom right side, enter into bottom precipitation unit, further precipitate, swash plate stops that the throw out in waste water precipitates further, be deposited in sludge hopper, the waste water level after process raises gradually and enters subsequent processing process by the rising pipe in precipitation unit;

When being I. full of throw out in the sludge hopper of arbitrary unit in light electrolysis unit, oxidizing, flocculating unit and precipitation unit, opening corresponding shore pipe and carry out spoil disposal;

J. when the module type filler in light electrolysis unit uses, or when stoppage in transit is safeguarded, wastewater influent pump and H is closed ₂o ₂dosing pump, waste water in light electrolysis unit is all sent in oxidizing, flocculating unit by the lift pump of opening installation on the rising pipe of light electrolysis unit, close the valve on rising pipe that light electrolysis unit is therewith communicated with, open valve, wastewater influent pump and H on the rising pipe that is communicated with another light electrolysis unit ₂o ₂dosing pump, guarantees that sewage disposal is uninterruptedly carried out continuously.

K. shift out and close wastewater influent pump and H ₂o ₂effluent trough in the light electrolysis unit of dosing pump, micro-electrolysis reaction layer in light electrolysis unit is taken out successively, put into new micro-electrolysis reaction layer more successively, effluent trough is positioned on light electrolysis unit, in order to next time, enable when the light electrolysis unit stoppage in transit used is safeguarded or module type filler uses.

Preferably, described micro-electrolysis reaction layer is made up of back up pad and module type filler, back up pad is set side by side with module type filler, described module type filler is made up of laminal filler, PVC bracket, described PVC bracket is cuboid-type, built-in draw-in groove, described laminal filler is vertically inserted in draw-in groove;

In described laminal filler, the mass fraction of each component and order number are respectively:

Cast iron or pig scrap: 55 ~ 60 parts, 50 ~ 60 orders;

Coke powder: 30 ~ 35 parts, 60 ~ 70 orders;

Copper powder: 5 ~ 10 parts, 50 ~ 60 orders;

Binding agent: 3 ~ 5 parts;

Binding agent comprises fine sand and silicate cement, and mass ratio is 1:2 ~ 3;

Its making step is as follows:

To be of a size of the wire netting of 8*8*0.8, be skeleton, after high pressure compression moulding, enter stove fill nitrogen high temp calcining shaping, temperature is: 1050 ~ 1200 DEG C, and the firing time is: 4 ~ 5 hours.

Owing to adding copper, form the potential difference larger than conventional iron carbon filler, not passivation when there is use, not cracked, the feature such as not lump; Laminal filler element number in module type filler, visual waste water quality situation is held flexibly, suitably increases and decreases; Described fagging is made up of glass reinforced plastic grizzly bar, and load-bearing is large.

The conventional iron carbon filler profile used is generally spheroidal, granular, annular or strip, general by physics pressing and forming, do not solidify through high-temperature firing, in using easily softening, Song Hua, be compacted, after long-time running, filling surface easily comes off formation passive film, the suspended particles such as part iron carbon mud are deposited on the filling surface being in bottom gradually, have intercepted filler with the effective of waste water and have contacted, caused water treatment effect to reduce; The present invention adopts this form of separating layer by layer, avoids suspended particle deposit filler surface, iron carbon filler is effectively fully contacted with waste water, improve water treatment effect;

In conventional iron carbon micro-electrolysis reactor, filler generally adopts landfill state, and during use, stack up does not have relatively-stationary support structure, and after long-term operation, filler size diminishes, and between filler, porosity declines, the filler of the more heavier mass of upper strata iron content sinks gradually, cause filler distribution in pond uneven while crushing the less filler of lower floor, form cutout or slough, not only affect waste water fluidised form, affecting light electrolysis effect causes processing efficiency to decline, and also makes follow-up replacement difficulty greatly increase, even if all waste water is cleared up in emptying reactor, if open-assembly time is longer, whole packing layer also may be made all to lump, cause that reactor is whole to be scrapped, the present invention arranges multilayer micro-electrolysis reaction layer in light electrolysis unit, separate layer by layer, every one deck supports by back up pad, back up pad is set side by side with many group module type fillers, described module type filler is by laminal filler, PVC bracket forms, described PVC bracket is cuboid-type, built-in draw-in groove, described laminal filler is vertically inserted in draw-in groove, long-time running, there is not filler, cause skewness, and form the phenomenon of cutout or slough, also the situation that there is not caking or reactor is scrapped, light electrolysis stabilised efficiency is efficient, after running for some time, micro-electrolysis reaction layer can be taken out, PVC bracket can reclaim, again continue to use after changing filler, handled easily, save cost, improve filler utilization ratio, improve wastewater treatment efficiency,

In conventional iron-carbon micro-electrolysis-Fenton's reaction device, micro-electrolysis stuffing is deposited in together as one deck, due to back up pad limited load bearing capacities, packing layer thickness is general less, waste water is after light electrolysis layer, continue again to come in contact with iron carbon filler in the process of upwards plug-flow, light electrolysis limited efficiency; The present invention arranges multilayer micro-electrolysis reaction layer in light electrolysis unit, separate layer by layer, every one deck supports by back up pad, back up pad is set side by side with many group module type fillers, waste water upwards plug-flow can contact with multilayer micro-electrolysis reaction layer, add the duration of contact of waste water and filler, processing efficiency is more excellent than traditional micro-electrolysis stuffing, and treatment effect is stablized.

Multistage light electrolysis of the present invention-Fenton reflection device can be used for small-sized sewage treating system and also can be used for city down-stream treatment system, only need according to difference ?the scantlings of the structure of the technical characteristic of application scenario design different parameters.

3. beneficial effect

Compared to prior art, beneficial effect of the present invention is:

(1) flocs unit formed after the present invention is directed to Fenton's reaction, because aeration time is longer, flco surface attachment has a lot of micro-bubble not easily to precipitate, the phenomenon of conventional precipitation method poor effect; Swash plate is set in order to strengthen sedimentation effect; The hole of aerating apparatus is used for aeration, and the hole of water-distributing device is used for water distribution, to prevent flco or particulate matter blocking aperture in waste water; These settings can both make described device effectively run, and reduce Breakdown Maintenance rate, ensure that device normally works; Described light electrolysis-Fenton's reaction device appearance is square, and inside is equally divided into 4 unit along opposite side mid point; Two light electrolysis unit are in parallel, only use one during normal operation, stop transport when safeguarding and open another unit, can guarantee that device operates continuously, and when there will not be replacing filler, or reactor when safeguarding of stopping transport wants the situation of Temporarily Closed to occur;

(2) sewage of the present invention enters sewage water inlet pipe through wastewater influent pump, H ₂o ₂h in storage tank ₂o ₂solution is through H ₂o ₂dosing pump, by H ₂o ₂chemical feed pipe is from H ₂o ₂chemical feed pipe face of tool is flowed out, and enter sewage water inlet pipe, collaborate with sewage, both fully mix at line mixer place, the sewage of outflow conduit mixing tank enters in the water-distributing device in light electrolysis unit, flow into the main on water-distributing device, flow out in the hole arm, along with sewage constantly flows in light electrolysis unit, water level rises, sewage contacts with each micro-electrolysis reaction layer gradually, sewage and laminal filler, namely iron carbon filler fully contacts, in acid condition, generation iron-carbon micro-electrolysis reacts, galvanic effect is formed between iron and carbon in waste water, difference in Electrode Potential is 1.2V, electrochemical reaction is there is in containing the aqueous solution of acidic electrolyte bath, the nascent state atom [H] that reaction produces and Fe ²⁺etc. can with the many component generation redox reactions in waste water, can reach and make that waste water COD reduces, BOD raises, biodegradability (B/C) improves and the effect such as waste water decoloring,

(3) H that adds of the present invention ₂o ₂with the Fe that iron-carbon micro-electrolysis reaction produces ²⁺mix, be less than the acidic conditions of 4 at pH under, there is Fenton's reaction, obtain the very strong OH of oxidation capacity (oxidizing electrode current potential 2.80V), thus by the reaction that the pollutant oxidation in waste water decomposes, have and be swift in response, be oxidized and more thoroughly, not produce the advantages such as secondary pollution;

(4) iron-carbon micro-electrolysis reaction of the present invention and Fenton's reaction are all react in acid condition, the Fe produced in iron-carbon micro-electrolysis process ²⁺be one of major pharmaceutical agent of Fenton's reaction, by iron-carbon micro-electrolysis together with Fenton oxidation combine with technique, form a kind of new wastewater treatment high-level oxidation technology---light electrolysis-Fenton oxidation technology, in acid condition, the Fe that iron-carbon micro-electrolysis reaction produces ²⁺, with the H added in waste water ₂o ₂generation Strong oxdiative reacts, and has reduced Fenton's reaction Fe ²⁺dosage, improves the processing power of device to pollutent; Conventional reactor, does not have oxygenic aeration, causes Fe in water outlet after Fenton oxidation terminates ²⁺more, the Fe (OH) formed after adding alkali ₂lighter weight not easily precipitates, and due to residual Fe in waste water ²⁺colour developing causes chroma in waste water higher, and visual sensory is poor; The present invention had not both had direct aeration, did not add alkali yet, avoided the generation of above-mentioned two situations.

(5), in conventional light electrolysis-Fenton's reaction device, mostly in light electrolysis unit, H is added ₂o ₂after start to carry out aeration, a large amount of oxygenation can make Fe ²⁺be converted into Fe ³⁺, and Fe ²⁺be one of major pharmaceutical agent of Fenton's reaction, so just slow down Fenton's reaction speed, reduce pollutant oxidation effect; Interval of the present invention aeration after 45 minutes, can not make Fe ²⁺be converted into Fe ³⁺, the Fe that iron-carbon micro-electrolysis produces ²⁺fenton's reaction speed can be improved, strengthen pollutant oxidation effect.Throw out after the reaction of iron carbon, Fenton's reaction and aeration, the impurity in sewage and throw out all sink in sludge hopper; In addition, the iron body refuse that falls of one deck micro-electrolysis reaction pull-up, may be attached to the surface of micro-electrolysis reaction layer, therefore intermittent aeration in light electrolysis unit above, with the iron body refuse on desorption micro-electrolysis reaction layer surface, improve the reaction effect of light electrolysis-Fenton device;

(6) water outlet after light electrolysis-Fenton's reaction of the present invention enters oxidizing, flocculating unit, adds NaOH and oxygenation continuously, can play following effect: by the Fe remained in waste water ²⁺be oxidized to Fe ³⁺, slough Fe ²⁺colourity, avoids water outlet to return look phenomenon; Make the further oxygenolysis of useless Organic substance in water; Form flocs unit under alkaline condition, aeration plays stirring action;

(7) laminal filler of the present invention be in conventional iron carbon filler, add copper powder, binding agent is shaping through high-temperature firing after being molded into sheet; Owing to adding copper, form the potential difference larger than conventional iron carbon filler, not passivation when there is use, not cracked, the feature such as not lump; Laminal filler element number in module type filler, visual waste water quality situation is held flexibly, suitably increases and decreases; Described fagging is made up of glass reinforced plastic grizzly bar, and load-bearing is large;

(8) the conventional iron carbon filler profile used is generally spheroidal, granular, annular or strip, general by physics pressing and forming, do not solidify through high-temperature firing, in using easily softening, Song Hua, be compacted, after long-time running, filling surface easily comes off formation passive film, the suspended particles such as part iron carbon mud are deposited on the filling surface being in bottom gradually, have intercepted filler with the effective of waste water and have contacted, caused water treatment effect to reduce; The present invention adopts this form of separating layer by layer, avoids suspended particle deposit filler surface, iron carbon filler is effectively fully contacted with waste water, improve water treatment effect;

(9) in conventional iron carbon micro-electrolysis reactor, filler generally adopts landfill state, and during use, stack up does not have relatively-stationary support structure, and after long-term operation, filler size diminishes, and between filler, porosity declines, the filler of the more heavier mass of upper strata iron content sinks gradually, cause filler distribution in pond uneven while crushing the less filler of lower floor, form cutout or slough, not only affect waste water fluidised form, affecting light electrolysis effect causes processing efficiency to decline, and also makes follow-up replacement difficulty greatly increase, even if all waste water is cleared up in emptying reactor, if open-assembly time is longer, whole packing layer also may be made all to lump, cause that reactor is whole to be scrapped, the present invention arranges multilayer micro-electrolysis reaction layer in light electrolysis unit, separate layer by layer, every one deck supports by back up pad, back up pad is set side by side with many group module type fillers, described module type filler is by laminal filler, PVC bracket forms, described PVC bracket is cuboid-type, built-in draw-in groove, described laminal filler is vertically inserted in draw-in groove, long-time running, there is not filler, cause skewness, and form the phenomenon of cutout or slough, also the situation that there is not caking or reactor is scrapped, light electrolysis stabilised efficiency is efficient, after running for some time, micro-electrolysis reaction layer can be taken out, PVC bracket can reclaim, again continue to use after changing filler, handled easily, save cost, improve filler utilization ratio, improve wastewater treatment efficiency,

(10) in conventional iron-carbon micro-electrolysis-Fenton's reaction device, micro-electrolysis stuffing is deposited in together as one deck, due to back up pad limited load bearing capacities, packing layer thickness is general less, waste water is after light electrolysis layer, continue again to come in contact with iron carbon filler in the process of upwards plug-flow, light electrolysis limited efficiency; The present invention arranges multilayer micro-electrolysis reaction layer in light electrolysis unit, separate layer by layer, every one deck supports by back up pad, back up pad is set side by side with many group module type fillers, waste water upwards plug-flow can contact with multilayer micro-electrolysis reaction layer, add the duration of contact of waste water and filler, processing efficiency is more excellent than traditional micro-electrolysis stuffing, and treatment effect is stablized;

(11) multistage light electrolysis of the present invention-Fenton reflection device can be used for small-sized sewage treating system and also can be used for city down-stream treatment system, only need according to difference ?the scantlings of the structure of the technical characteristic of application scenario design different parameters.

Accompanying drawing explanation

fig. 1for water-distributing device of the present invention is illustrated figure;

fig. 2for arm cross section of the present invention figure;

fig. 3for H of the present invention ₂o ₂the structural representation of throwing device figure;

fig. 4for module type iron carbon filler signal of the present invention figure.

1, wastewater influent pump; 2, H ₂o ₂dosing pump; 2-1, H ₂o ₂storage tank; 2-2, H ₂o ₂chemical feed pipe; 3, line mixer; 4, multistage light electrolysis-Fenton's reaction device; 4-1, multistage light electrolysis unit; 4-11, sludge hopper; 4-12, shore pipe; 4-13, aerating apparatus; 4-14, water-distributing device, 4-14-1 main; 4-14-2, arm; 4-15 module type iron carbon filler; 4-15-1, sheet iron carbon filler; 4-15-2, module type PVC bracket; 4-15-3, glass reinforced plastic grizzly bar back up pad; 4-16, effluent trough; 4-17, rising pipe; 4-2, oxidizing, flocculating unit; 4-21, center water inlet pipe; 4-22, umbrella shape scatterer; 4-23, aerating apparatus; 4-24, sludge hopper; 4-25, shore pipe; 4-28, NaOH chemical feed pipe; 4-29, NaOH respond to dosing pump; 4-30, NaOH solution storage tank; 4-31, pH on-line computing model; 4-3, precipitation unit; 4-33, swash plate.

Embodiment

Below in conjunction with specific embodiment, the present invention is described further.

Embodiment 1

In conjunction with fig. 1-4, a kind of multistage light electrolysis-Fenton's reaction device of module type iron carbon filler, comprises wastewater influent pump 1, H ₂o ₂throwing device and line mixer 3, it also comprises light electrolysis-Fenton's reaction device 4, and wherein, described wastewater influent pump 1 is arranged on sewage water inlet pipe, sewage water inlet pipe and described H ₂o ₂after throwing device is communicated with, H ₂o ₂add and be communicated with described line mixer 3, described line mixer 3 is communicated with described light electrolysis-Fenton's reaction device 4 by pipeline;

Described H ₂o ₂throwing device comprises H ₂o ₂storage tank 2-1, H ₂o ₂chemical feed pipe 2-2 and H ₂o ₂dosing pump 2; Described H ₂o ₂the bottom of storage tank 2-1 and H ₂o ₂chemical feed pipe 2-2 is communicated with, described H ₂o ₂chemical feed pipe 2-2 is provided with H ₂o ₂dosing pump 2.

Described H ₂o ₂chemical feed pipe 2-2 is inserted into the center position of cross section along the vertical line of sewage water inlet pipe, H ₂o ₂the outlet of chemical feed pipe 2-2 in sewer line, cuts along water (flow) direction reverse side, and face of tool and water (flow) direction be at 45 ° ~ 60 ° of angles, expansion H ₂o ₂the outlet area of chemical feed pipe 2-2, H ₂o ₂distance between the position that chemical feed pipe 2-2 is communicated with sewage water inlet pipe and line mixer 3 is greater than 300mm, makes H ₂o ₂can mix with sewage.

Described light electrolysis-Fenton's reaction device 4 comprises four unit, wherein there are two light electrolysis unit 4-1, an oxidizing, flocculating unit 4-2 and precipitation unit 4-3, be communicated with oxidizing, flocculating unit 4-2 after two light electrolysis unit 4-1 are connected, oxidizing, flocculating unit 4-2 is communicated with precipitation unit 4-3, described precipitation unit 4-3 side is provided with rising pipe 4-17, is provided with shore pipe 4-12 bottom described precipitation unit 4-3.Described light electrolysis-Fenton's reaction device 4 outward appearance is square, and inside is equally divided into 4 unit along opposite side mid point; Two light electrolysis unit 4-1 are in parallel, only use one during normal operation, stop transport when safeguarding and open another unit, can guarantee that device operates continuously.

The bottom of described light electrolysis unit 4-1 is provided with shore pipe 4-12, shore pipe 4-12 is connected with sludge hopper 4-11, sludge hopper 4-11 is provided with aerating apparatus 4-13, water-distributing device 4-14 is provided with above aerating apparatus 4-13, 3-6 layer micro-electrolysis reaction layer is provided with above water-distributing device 4-14, to increase the duration of contact of waste water and filler, ensure that micro-electrolysis reaction effect, effluent trough 4-16 is provided with above micro-electrolysis reaction layer, effluent trough 4-16 bottom right side is provided with rising pipe 4-17, aerating apparatus 4-13 place plane, water-distributing device 4-14 place plane and micro-electrolysis reaction layer place plane parallel to each other, described water-distributing device 4-14 is communicated with described line mixer 3 by pipeline, rising pipe 4-17 in described light electrolysis unit 4-1 and the center water inlet pipe 4-21 in oxidizing, flocculating unit 4-2.Intake by bottom light electrolysis unit 4-1, the effluent trough 4-16 water outlet on light electrolysis unit 4-1 top, runs the body refuse produced and discharges from the shore pipe 4-12 be arranged on bottom light electrolysis unit 4-1.

Described micro-electrolysis reaction layer is made up of back up pad 4-15-3 and module type filler 4-15, back up pad 4-15-3 is set side by side with module type filler 4-15, described module type filler 4-15 is made up of laminal filler 4-15-1, PVC bracket 4-15-2, described PVC bracket 4-15-2 is cuboid-type, built-in draw-in groove, described laminal filler 4-15-1 vertically inserts in draw-in groove, every layer of micro-electrolysis reaction layer has 600 ~ 1800 laminal filler 4-15-1.

NaOH automatic medicament feeding system is provided with above described oxidizing, flocculating unit 4-2, NaOH automatic medicament feeding system is by NaOH solution storage tank 4-30, NaOH chemical feed pipe 4-28 and NaOH responds to dosing pump 4-29, the bottom of described NaOH solution storage tank 4-30 is communicated with NaOH chemical feed pipe 4-28, described NaOH chemical feed pipe 4-28 is provided with NaOH and responds to dosing pump 4-29, described NaOH chemical feed pipe 4-28 stretches in the water inlet pipe 4-21 of center, center water inlet pipe 4-21 is arranged on the central axis of oxidizing, flocculating unit 4-2, the Upper vertical of center water inlet pipe 4-21 inserts in the effluent trough 4-16 at oxidizing, flocculating unit 4-2 top, pH on-line computing model 4-31 is provided with in effluent trough 4-16, described pH on-line computing model 4-31 and NaOH responds to dosing pump 4-29 and connects, effluent trough 4-16 bottom right side is provided with rising pipe 4-17, umbrella shape scatterer 4-22 is provided with bottom the water inlet pipe 4-21 of center, the bottom of oxidizing, flocculating unit 4-2 is provided with aerating apparatus 4-13, sludge hopper 4-11 is provided with below aerating apparatus 4-13, shore pipe 4-12 is provided with below sludge hopper 4-11, rising pipe 4-17 in described oxidizing, flocculating unit 4-2 is communicated with the center water inlet pipe 4-21 in precipitation unit 4-3.

Described aerating apparatus 4-13 is identical with water-distributing device 4-14 structure, be made up of main 4-14-1, arm 4-14-2, arm 4-14-2 is arranged on the both sides of main 4-14-1 symmetrically and evenly, arm 4-14-2 is vertical with main 4-14-1, arm 4-14-2 arranges porose on the surface, is that 45 ° of angles are evenly distributed on vertical line both sides with arm 4-14-2 cross-section normal direction.To prevent flco or particulate matter blocking aperture in waste water, the main 4-14-1 of described aerating apparatus 4-13 is connected with the air compressor machine of peripheral hardware, and air compressor machine passes into pressurized air in main 4-14-1, and the hole of aerating apparatus 4-13 is used for aeration, can by Fe ²⁺(blue-greenish colour) is oxidized to Fe ³⁺(brown color), more be conducive to precipitation and effluent color dilution can be reduced further, be attached to fine particle thing and the body refuse on micro-electrolysis stuffing surface with stripping, when avoiding using for a long time, particulate matter attachment causes light electrolysis effect to decline, and water-distributing device 4-14 is used for water distribution.

The central axis of described precipitation unit 4-3 is provided with center water inlet pipe 4-21, center water inlet pipe 4-21 Upper vertical inserts in the effluent trough 4-16 at oxidizing, flocculating unit 4-2 top, the side bottom of effluent trough 4-16 is provided with rising pipe 4-17 and is communicated with, center water inlet pipe 4-21 is through the swash plate 4-33 be arranged in oxidizing, flocculating unit 4-2, for the flocs unit formed after Fenton's reaction, because aeration time is longer, flco surface attachment has a lot of micro-bubble not easily to precipitate, the phenomenon of conventional precipitation method poor effect; Swash plate 4-33 is in order to strengthen sedimentation effect; Be provided with umbrella shape scatterer 4-22 bottom the water inlet pipe 4-21 of center, bottom precipitation unit 4-3, be provided with sludge hopper 4-11, below sludge hopper 4-11, be provided with shore pipe 4-12.

Described center water inlet pipe 4-21, diameter is D, bottom arranges umbrella shape scatterer 4-22,30 °, scatterer corner, bottom lengths is (1.2 ~ 1.5) D, described sludge hopper 4-11 front view shape is upside-down trapezoid, and described shore pipe 4-12 diameter is not less than 200mm, blocks cause spoil disposal not smooth to prevent body refuse.

A according to mentioned above, the multistage light electrolysis-Fenton's reaction device of a kind of module type iron carbon filler described in structure;

B. review and validate shore pipe 4-12 and be in closing condition;

C. valve, wastewater influent pump 1 and the H on a rising pipe 4-17 be communicated with light electrolysis unit 4-1 is closed ₂o ₂dosing pump 2, makes the light electrolysis unit 4-1 in light electrolysis-Fenton's reaction device 4 only have one to can be used in sewage disposal;

D. valve, wastewater influent pump 1 and the H on another rising pipe 4-17 be communicated with light electrolysis unit 4-1 is opened ₂o ₂dosing pump 2, makes the light electrolysis unit 4-1 in light electrolysis-Fenton's reaction device 4 only have one to can be used in sewage disposal; Open H ₂o ₂dosing pump (2) adds H in sewage ₂o ₂; Sewage enters sewage water inlet pipe through wastewater influent pump 1, H ₂o ₂h in storage tank 2-1 ₂o ₂solution is through H ₂o ₂dosing pump 2, by H ₂o ₂chemical feed pipe 2-2 is from H ₂o ₂chemical feed pipe 2-2 face of tool is flowed out, and enter sewage water inlet pipe, collaborate with sewage, both fully mix at line mixer 3 place;

Light electrolysis principle of work is:

When waste water fully contacts with improvement iron-carbon micro-electrolysis filler unit, take iron as anode, carbon (copper) is negative electrode generation micro-electrolysis reaction, electrode reaction is as follows:

Anode (Fe): Fe-2e=Fe ²⁺e ⁰=-0.44V,

Negative electrode (C): 2H ⁺+ 2e=H ₂e ⁰=0V,

When aerobic exists there is following reaction in negative electrode:

O ₂+4H ⁺+4e＝H ₂OE ⁰＝-1.23V

O ₂+2H ₂O+4e＝5OH ^--E ⁰＝0.40V

Copper powder is as cathode material, and electropotential is in acid condition: E ⁰=-0.34V; Electropotential under alkaline condition: E ⁰=-0.22V.The existence of copper powder expands potential difference and the applicable pH range of micro-electrolysis reaction, namely even micro-electrolysis reaction still can be made to continue to carry out under alkaline condition at the pH partial neutral of conventional iron carbon micro-electrolysis poor effect, the pollutent in waste water be decomposed under light electrolysis effect more thorough.

The principle of work of Fenton's reaction is:

Hydrogen peroxide (H is added in micro-electrolysis reactor ₂o ₂) time, the Fe that micro-electrolysis reaction produces ²⁺catalysis H ₂o ₂decompose the OH producing and there is strong oxidizing property:

Fe ²⁺+H ₂O ₂＝Fe ³⁺+OH ^-+·OHE ⁰＝2.80V

OH has very strong oxidisability, and especially in acid waste water, oxidation capacity is very strong, is only second to F at nature.Common small organic molecule can complete oxidation, also dysoxidizable for common oxidizer fragrant type organic matter and some heterocyclic organism etc. almost all can be decomposed.

The sewage of outflow conduit mixing tank 3 enters in the water-distributing device 4-14 in light electrolysis unit 4-1, flow into the main 4-14-1 on water-distributing device 4-14, flow out in the hole arm 4-14-2, along with sewage constantly flows in light electrolysis unit 4-1, water level rises, sewage contacts with each micro-electrolysis reaction layer gradually, sewage and laminal filler 4-15-1, namely iron carbon filler fully contacts, in acid condition, generation iron-carbon micro-electrolysis reacts, galvanic effect is formed between iron and carbon in waste water, difference in Electrode Potential is 1.2V, electrochemical reaction is there is in containing the aqueous solution of acidic electrolyte bath, the nascent state atom [H] that reaction produces and Fe ²⁺etc. can with the many component generation redox reactions in waste water, can reach and make that waste water COD reduces, BOD raises, biodegradability (B/C) improves and the effect such as waste water decoloring,

Also some does not have oxygenic aeration after Fenton oxidation terminates, and causes Fe in water outlet ²⁺more, the Fe (OH) formed after adding alkali ₂lighter weight not easily precipitates, and due to residual Fe in waste water ²⁺colour developing causes chroma in waste water higher, and visual sensory is poor; The present invention had not both had direct aeration, did not add alkali yet, avoided the generation of above-mentioned two situations.

E. H is added ₂o ₂after end, the aerating apparatus 4-13 of light electrolysis unit 4-1 was at interval of 45 minutes aerations 10 ~ 15 minutes; And in conventional light electrolysis-Fenton's reaction device, mostly in light electrolysis unit 4-1, add H ₂o ₂after start to carry out aeration, a large amount of oxygenation can make Fe ²⁺be converted into Fe ³⁺, and Fe ²⁺be one of major pharmaceutical agent of Fenton's reaction, so just slow down Fenton's reaction speed, reduce pollutant oxidation effect; Interval of the present invention aeration after 45 minutes, can not make Fe ²⁺be converted into Fe ³⁺, the Fe that iron-carbon micro-electrolysis produces ²⁺fenton's reaction speed can be improved, strengthen pollutant oxidation effect.Throw out after the reaction of iron carbon, Fenton's reaction and aeration, the impurity in sewage and throw out all sink in sludge hopper 4-11;

In addition, the iron body refuse that falls of one deck micro-electrolysis reaction pull-up, may be attached to the surface of micro-electrolysis reaction layer, therefore intermittent aeration in light electrolysis unit 4-1 above, with the iron body refuse on desorption micro-electrolysis reaction layer surface, improve the reaction effect of light electrolysis-Fenton device 4.

Micro-electrolysis reaction layer is made up of back up pad 4-15-3 and module type filler 4-15, back up pad 4-15-3 is set side by side with module type filler 4-15, described module type filler 4-15 is made up of laminal filler 4-15-1, PVC bracket 4-15-2, described PVC bracket 4-15-2 is cuboid-type, built-in draw-in groove, described laminal filler 4-15-1 vertically inserts in draw-in groove;

In laminal filler 4-15-1, the mass fraction of each component and order number are respectively:

Cast iron or pig scrap: 55 ~ 60 parts, 50 ~ 60 orders;

Coke powder: 30 ~ 35 parts, 60 ~ 70 orders;

Copper powder: 5 ~ 10 parts, 50 ~ 60 orders;

Binding agent: 3 ~ 5 parts;

Its making step is as follows:

To be of a size of the wire netting of 8*8*0.8 for skeleton, after high pressure compression moulding, enter stove fill nitrogen high temp calcining shaping, temperature is: 1050 ~ 1200 DEG C, and the firing time is: 4 ~ 5 hours.Finished product laminal filler 4-15-1 apparent size is: 140mm (length) × 140mm (wide) × 8mm (thick).

Due to adding of copper; Form the potential difference larger than conventional iron carbon filler, not passivation when there is use, not cracked, the feature such as not lump; Laminal filler element number in module type filler 4-15, visual waste water quality situation is held flexibly, suitably increases and decreases; Described fagging 4-15-3 is made up of glass reinforced plastic grizzly bar, and load-bearing is large.

In conventional iron carbon micro-electrolysis reactor, filler generally adopts landfill state, and during use, stack up does not have relatively-stationary support structure, and after long-term operation, filler size diminishes, and between filler, porosity declines, the filler of the more heavier mass of upper strata iron content sinks gradually, cause filler distribution in pond uneven while crushing the less filler of lower floor, form cutout or slough, not only affect waste water fluidised form, affecting light electrolysis effect causes processing efficiency to decline, and also makes follow-up replacement difficulty greatly increase, even if all waste water is cleared up in emptying reactor, if open-assembly time is longer, whole packing layer also may be made all to lump, cause that reactor is whole to be scrapped, the present invention arranges multilayer micro-electrolysis reaction layer in light electrolysis unit 4-1, separate layer by layer, every one deck supports by back up pad 4-15-3, back up pad 4-15-3 is set side by side with many group module type filler 4-15, described module type filler 4-15 is by laminal filler 4-15-1, PVC bracket 4-15-2 forms, described PVC bracket 4-15-2 is cuboid-type, built-in draw-in groove, described laminal filler 4-15-1 vertically inserts in draw-in groove, long-time running, there is not filler, cause skewness, and form the phenomenon of cutout or slough, also the situation that there is not caking or reactor is scrapped, light electrolysis stabilised efficiency is efficient, after running for some time, micro-electrolysis reaction layer can be taken out, PVC bracket 4-15-2 can reclaim, again continue to use after changing filler, handled easily, save cost, improve filler utilization ratio, improve wastewater treatment efficiency,

The physical dimension of PVC bracket 4-15-2 is: 150mm (length) × 150mm (wide) × 150mm (height), and slot is reserved in the inside, can insert at most 6 laminal filler 4-15-1; Leave certain space between laminal filler 4-15-1, be conducive to waste water by and reaction formed iron mud fall into sludge hopper at the bottom of pond.

In conventional iron-carbon micro-electrolysis-Fenton's reaction device, micro-electrolysis stuffing is deposited in together as one deck, due to back up pad limited load bearing capacities, packing layer thickness is general less, waste water is after light electrolysis layer, continue again to come in contact with iron carbon filler in the process of upwards plug-flow, light electrolysis limited efficiency; The present invention arranges multilayer micro-electrolysis reaction layer in light electrolysis unit 4-1, separate layer by layer, every one deck supports by back up pad 4-15-3, back up pad 4-15-3 is set side by side with many group module type filler 4-15, waste water upwards plug-flow can contact with multilayer micro-electrolysis reaction layer, add the duration of contact of waste water and filler, processing efficiency is more excellent than traditional micro-electrolysis stuffing, and treatment effect is stablized.

F. the aerating apparatus 4-13 continuous aeration bottom oxidizing, flocculating unit 4-2, gas-water ratio 6 ~ 15:1; In light electrolysis unit 4-1 with Fe ²⁺sewage flow in the center water inlet pipe 4-21 of oxidizing, flocculating unit 4-2 by the rising pipe 4-17 on effluent trough 4-16, entered the bottom of oxidizing, flocculating unit 4-2 by the umbrella shape scatterer 4-22 bottom the water inlet pipe 4-21 of center; By the aerating apparatus 4-13 entrance bottom oxidizing, flocculating unit 4-2, continuous aeration, gas-water ratio 6 ~ 15:1, by Fe in waste water ²⁺be oxidized to rear Fe ³⁺, remove the colourity of sewage;

G. when waste water level arrives in effluent trough 4-16, pH on-line computing model 4-31 in effluent trough 4-16, the pH value of monitoring waste water, automatically opens NaOH and responds to dosing pump 4-29 when pH is less than 6, NaOH solution is added in the water inlet pipe 4-21 of center, generates floss Fe (OH) ₃, sweep along pollutent to be deposited in sludge hopper 4-11 further;

Add NaOH in water outlet after light electrolysis-Fenton's reaction and oxygenation continuously, following effect can be played: by the Fe remained in waste water ²⁺be oxidized to Fe ³⁺, slough Fe ²⁺colourity, avoids water outlet to return look phenomenon; Make the further oxygenolysis of useless Organic substance in water; Form flocs unit under alkaline condition, aeration plays stirring action.

H. after oxidizing, flocculating unit 4-2 process, waste water flows in the center water inlet pipe 4-21 of precipitation unit 4-3 by the rising pipe 4-17 of effluent trough 4-16 bottom right side, enter into bottom precipitation unit 4-3, further precipitate, swash plate 4-33 stops that the throw out in waste water precipitates further, be deposited in sludge hopper 4-11, the waste water level after process raises gradually and enters subsequent processing process by the rising pipe 4-17 in precipitation unit 4-3;

When being I. full of throw out in the sludge hopper 4-11 of arbitrary unit in light electrolysis unit 4-1, oxidizing, flocculating unit 4-2 and precipitation unit 4-3, opening corresponding shore pipe 4-12 and carry out spoil disposal;

J. when the module type filler 4-15 in light electrolysis unit 4-1 uses, or when stoppage in transit is safeguarded, wastewater influent pump 1 and H is closed ₂o ₂dosing pump 2, waste water in light electrolysis unit 4-1 is all sent in oxidizing, flocculating unit 4-2 by the lift pump of opening installation on the rising pipe 4-17 of light electrolysis unit 4-1, close the valve on rising pipe 4-17 that light electrolysis unit 4-1 is therewith communicated with, open valve, wastewater influent pump and H on the rising pipe 4-17 that is communicated with another light electrolysis unit 4-1 ₂o ₂dosing pump, guarantees that sewage disposal is uninterruptedly carried out continuously.

K. shift out and close wastewater influent pump 1 and H ₂o ₂effluent trough 4-16 in the light electrolysis unit 4-1 of dosing pump 2, light electrolysis layer in light electrolysis unit 4-1 is taken out successively, put into new light electrolysis layer more successively, effluent trough 4-16 is positioned on light electrolysis unit 4-1, in order to next time, enable when the light electrolysis unit 4-1 stoppage in transit used is safeguarded or module type filler 4-15 uses.

Embodiment 2

Certain printing and dyeing mill's high density factory effluent, this waste water generation is about 300t/d; PH3.3 ~ 4.6, average 3.9; COD5000 ~ 9200mg/L, average 7300mg/L; B/C<0.15, wastewater biodegradability is poor.A kind of multistage light electrolysis-Fenton's reaction device of module type iron carbon filler is proposed, as Fig. 1-4shown in, its structure and using method with embodiment 1, wherein, H ₂o ₂distance between the position that chemical feed pipe 2-2 is communicated with sewage water inlet pipe and line mixer 3 is 301mm, and the quantity of micro-electrolysis reaction layer is 3 layers, and shore pipe 4-12 diameter is 201mm, adds H ₂o ₂after end, the aerating apparatus 4-13 of light electrolysis unit 4-1 was at interval of 45 minutes aerations 10 minutes, and back up pad 4-15-3 is set side by side with 200 groups of module type filler 4-15, the quantity of the laminal filler 4-15-1 in every one deck micro-electrolysis reaction layer is 600.

H ₂o ₂the outlet of chemical feed pipe 2-2 in sewer line, cuts along water (flow) direction reverse side, face of tool and water (flow) direction angle at 45 °; Center water inlet pipe 4-21, diameter is D, and bottom arranges umbrella shape scatterer 4-22,30 °, scatterer corner, and bottom lengths is 1.2D; In laminal filler 4-15-1, the mass fraction of each component and order number are respectively:

Cast iron or pig scrap: 55 parts, 50 orders;

Coke powder: 30 parts, 60 orders;

Copper powder: 5 parts, 50 orders;

Binding agent: 3 parts;

Binding agent comprises fine sand and silicate cement, and mass ratio is 1:2; After high pressure compression moulding, enter stove fill nitrogen high temp calcining shaping, temperature is: 1050 DEG C, and the firing time is: 4 hours.

The quantity of arm 4-14-2 is 8 to totally 16, as Fig. 4, every root arm 4-14-2 has two holes partnered, and totally 7 is right.

Waste water pumps in device from bottom, and control hydraulic detention time is 60min, and hydrogen peroxide dosage is 4.0mL/L, and at interval of 45 minutes aeration 10 clocks, gas-water ratio was 6:1; Continuous aeration in oxidizing, flocculating reactor, gas-water ratio is 6:1, process effluent quality is: pH is 6.7, COD is 3160mg/L, COD clearance is 56.7%, B/C=0.36, and wastewater biodegradability is greatly improved, in use procedure, in reactor there is not blocking, the broken and phenomenon that hardens in improvement iron carbon filler, and integrated apparatus operation conditions is good.

Embodiment 3

Jiangsu factory high concentration agricultural chemical factory effluent, this waste water generation is about 90t/d; PH1.8 ~ 3.2, average 2.6; COD4200 ~ 6500mg/L, average 5100mg/L; B/C<0.15, wastewater biodegradability is poor, proposes a kind of multistage light electrolysis-Fenton's reaction device of module type iron carbon filler, as Fig. 1-4shown in, its structure and using method with embodiment 1, wherein, H ₂o ₂distance between the position that chemical feed pipe 2-2 is communicated with sewage water inlet pipe and line mixer 3 is 500mm, and the quantity of micro-electrolysis reaction layer is 6 layers, and shore pipe 4-12 diameter is 300mm, adds H ₂o ₂after end, the aerating apparatus 4-13 of light electrolysis unit 4-1 was at interval of 45 minutes aerations 15 minutes, and back up pad 4-15-3 is set side by side with 150 groups of module type filler 4-15, the quantity of the laminal filler 4-15-1 in every one deck micro-electrolysis reaction layer is 900.

H ₂o ₂the outlet of chemical feed pipe 2-2 in sewer line, cut along water (flow) direction reverse side, face of tool becomes 60 ° of angles with water (flow) direction; Center water inlet pipe 4-21, diameter is D, and bottom arranges umbrella shape scatterer 4-22,30 °, scatterer corner, and bottom lengths is 1.5D; In laminal filler 4-15-1, the mass fraction of each component and order number are respectively:

Cast iron or pig scrap: 60 parts, 60 orders;

Coke powder: 35 parts, 70 orders;

Copper powder: 10 parts, 60 orders;

Binding agent: 5 parts;

Binding agent comprises fine sand and silicate cement, and mass ratio is 1:3; After high pressure compression moulding, enter stove fill nitrogen high temp calcining shaping, temperature is: 1200 DEG C, and the firing time is: 5 hours.

The quantity of arm 4-14-2 is 10 to totally 20, as Fig. 4, every root arm 4-14-2 has two holes partnered, and totally 9 is right.

Waste water pumps in device from bottom, and control hydraulic detention time is 120min, and hydrogen peroxide dosage is 3.0mL/L, and at interval of 45 minutes aerations 15 minutes, gas-water ratio was 10:1; Continuous aeration in oxidizing, flocculating reactor, gas-water ratio is 12:1, and process effluent quality is: pH is 6.4, COD be 1780mg/L, COD clearance is 65.10%, B/C=0.39, and wastewater biodegradability is greatly improved.In use procedure, in reactor there is not blocking, the broken and phenomenon that hardens in improvement iron carbon filler, and integrated apparatus operation conditions is good.

Embodiment 4

Zhejiang high concentration coking, this waste water generation is about 420t/d, records waste water quality in equalizing tank and is about: pH4.5, colourity 1200, COD5860mg/L, B/C<0.15.A kind of multistage light electrolysis-Fenton's reaction device of module type iron carbon filler is proposed, as Fig. 1-4shown in, its structure and using method with embodiment 1, wherein, H ₂o ₂distance between the position that chemical feed pipe 2-2 is communicated with sewage water inlet pipe and line mixer 3 is 800mm, and the quantity of micro-electrolysis reaction layer is 5 layers, and shore pipe 4-12 diameter is 500mm, adds H ₂o ₂after end, the aerating apparatus 4-13 of light electrolysis unit 4-1 was at interval of 45 minutes aerations 13 minutes, and back up pad 4-15-3 is set side by side with 180 groups of module type filler 4-15, the quantity of the laminal filler 4-15-1 in every one deck micro-electrolysis reaction layer is 1800.

H ₂o ₂the outlet of chemical feed pipe 2-2 in sewer line, cut along water (flow) direction reverse side, face of tool becomes 50 ° of angles with water (flow) direction; Center water inlet pipe 4-21, diameter is D, and bottom arranges umbrella shape scatterer 4-22,30 °, scatterer corner, and bottom lengths is 1.4D; In laminal filler 4-15-1, the mass fraction of each component and order number are respectively:

Cast iron or pig scrap: 58 parts, 55 orders;

Coke powder: 34 parts, 67 orders;

Copper powder: 7 parts, 56 orders;

Binding agent: 4 parts;

Binding agent comprises fine sand and silicate cement, and mass ratio is 1:2.8; After high pressure compression moulding, enter stove fill nitrogen high temp calcining shaping, temperature is: 1100 DEG C, and the firing time is: 4.5 hours.

The quantity of arm 4-14-2 is 9 to totally 18, as Fig. 4, every root arm 4-14-2 has two holes partnered, and totally 8 is right.

Control hydraulic detention time is 90min, and hydrogen peroxide dosage is 6.0mL/L, and at interval of 45 minutes aerations 15 minutes, gas-water ratio was 15:1; Continuous aeration in oxidizing, flocculating reactor, gas-water ratio is 15:1, and process effluent quality is: pH is 6.8, COD be 1840mg/L, COD clearance is 68.6%, B/C=0.37, and wastewater biodegradability is greatly improved.In use procedure, in reactor there is not blocking, the broken and phenomenon that hardens in improvement iron carbon filler, and integrated apparatus operation conditions is good.

Claims

1. multistage light electrolysis-Fenton's reaction device of module type iron carbon filler, comprises wastewater influent pump (1), H ₂o ₂throwing device and line mixer (3), is characterized in that, it also comprises light electrolysis-Fenton's reaction device (4), and wherein, described wastewater influent pump (1) is arranged on sewage water inlet pipe, sewage water inlet pipe and described H ₂o ₂after throwing device is communicated with, H ₂o ₂add and be communicated with described line mixer (3), described line mixer (3) is communicated with described light electrolysis-Fenton's reaction device (4) by pipeline;

Described light electrolysis-Fenton's reaction device (4) comprises four unit, wherein there are two light electrolysis unit (4-1), an oxidizing, flocculating unit (4-2) and a precipitation unit (4-3), be communicated with oxidizing, flocculating unit (4-2) after two light electrolysis unit (4-1) are connected, oxidizing, flocculating unit (4-2) is communicated with precipitation unit (4-3), described precipitation unit (4-3) side is provided with rising pipe (4-17), and described precipitation unit (4-3) bottom is provided with shore pipe (4-12).

2. the multistage light electrolysis-Fenton's reaction device of a kind of module type iron carbon filler according to claim 1, is characterized in that, described H ₂o ₂throwing device comprises H ₂o ₂storage tank (2-1), H ₂o ₂chemical feed pipe (2-2) and H ₂o ₂dosing pump (2); Described H ₂o ₂the bottom of storage tank (2-1) and H ₂o ₂chemical feed pipe (2-2) is communicated with, described H ₂o ₂chemical feed pipe (2-2) is provided with H ₂o ₂dosing pump (2).

3. the multistage light electrolysis-Fenton's reaction device of a kind of module type iron carbon filler according to claim 2, is characterized in that, described H ₂o ₂chemical feed pipe (2-2) is inserted into the center position of cross section along the vertical line of sewage water inlet pipe, H ₂o ₂chemical feed pipe (2-2) outlet in sewer line, along water (flow) direction reverse side cut, face of tool and water (flow) direction at 45 ° ~ 60 ° of angles, H ₂o ₂distance between the position that chemical feed pipe (2-2) is communicated with sewage water inlet pipe and line mixer (3) is greater than 300mm.

4. the multistage light electrolysis-Fenton's reaction device of a kind of module type iron carbon filler described in 1 is required according to profit, it is characterized in that, the bottom of described light electrolysis unit (4-1) is provided with shore pipe (4-12), shore pipe (4-12) is connected with sludge hopper (4-11), sludge hopper (4-11) is provided with aerating apparatus (4-13), aerating apparatus (4-13) top is provided with water-distributing device (4-14), water-distributing device (4-14) top is provided with 3-6 layer micro-electrolysis reaction layer, effluent trough (4-16) is provided with above micro-electrolysis reaction layer, effluent trough (4-16) bottom right side is provided with rising pipe (4-17), aerating apparatus (4-13) place plane, water-distributing device (4-14) place plane and micro-electrolysis reaction layer place plane parallel to each other, described water-distributing device (4-14) is communicated with described line mixer (3) by pipeline, described rising pipe (4-17) and the center water inlet pipe (4-21) in oxidizing, flocculating unit (4-2).

5. the multistage light electrolysis-Fenton's reaction device of a kind of module type iron carbon filler described in 1 is required according to profit, it is characterized in that, described oxidizing, flocculating unit (4-2) top is provided with NaOH automatic medicament feeding system, NaOH automatic medicament feeding system is by NaOH solution storage tank (4-30), NaOH chemical feed pipe (4-28) and NaOH respond to dosing pump (4-29), the bottom of described NaOH solution storage tank (4-30) is communicated with NaOH chemical feed pipe (4-28), described NaOH chemical feed pipe (4-28) is provided with NaOH and responds to dosing pump (4-29), described NaOH chemical feed pipe (4-28) stretches in center water inlet pipe (4-21), center water inlet pipe (4-21) is arranged on the central axis of oxidizing, flocculating unit (4-2), the Upper vertical of center water inlet pipe (4-21) inserts in the effluent trough (4-16) at oxidizing, flocculating unit (4-2) top, pH on-line computing model (4-31) is provided with in effluent trough (4-16), described pH on-line computing model (4-31) and NaOH respond to dosing pump (4-29) and are connected, effluent trough (4-16) bottom right side is provided with rising pipe (4-17), center water inlet pipe (4-21) bottom is provided with umbrella shape scatterer (4-22), the bottom of oxidizing, flocculating unit (4-2) is provided with aerating apparatus (4-13), sludge hopper (4-11) is provided with below aerating apparatus (4-13), shore pipe (4-12) is provided with below sludge hopper (4-11), rising pipe (4-17) in described oxidizing, flocculating unit (4-2) is communicated with the center water inlet pipe (4-21) in precipitation unit (4-3).

6. the multistage light electrolysis-Fenton's reaction device of a kind of module type iron carbon filler described in 1 is required according to profit, it is characterized in that, the central axis of described precipitation unit (4-3) is provided with center water inlet pipe (4-21), center water inlet pipe (4-21) Upper vertical inserts in the effluent trough (4-16) at oxidizing, flocculating unit (4-2) top, the side bottom of effluent trough (4-16) is provided with rising pipe (4-17) and is communicated with, center water inlet pipe (4-21) is through the swash plate (4-33) be arranged in oxidizing, flocculating unit (4-2), center water inlet pipe (4-21) bottom is provided with umbrella shape scatterer (4-22), precipitation unit (4-3) bottom is provided with sludge hopper (4-11), shore pipe (4-12) is provided with below sludge hopper (4-11),

Described center water inlet pipe (4-21), diameter is D, bottom arranges umbrella shape scatterer (4-22), 30 °, scatterer corner, bottom lengths is (1.2 ~ 1.5) D, described sludge hopper (4-11) front view shape is upside-down trapezoid, and described shore pipe (4-12) diameter is not less than 200mm.

7. the multistage light electrolysis-Fenton's reaction device of a kind of module type iron carbon filler described in 3 is required according to profit, it is characterized in that, described aerating apparatus (4-13) is identical with water-distributing device (4-14) structure, by main (4-14-1), arm (4-14-2) forms, arm (4-14-2) is arranged on the both sides of main (4-14-1) symmetrically and evenly, arm (4-14-2) is vertical with main (4-14-1), arm (4-14-2) arranges porose on the surface, be that 45 ° of angles are evenly distributed on vertical line both sides with arm (4-14-2) cross-section normal direction, the main (4-14-1) of described aerating apparatus (4-13) is connected with the air compressor machine of peripheral hardware.

8. the multistage light electrolysis-Fenton's reaction device of a kind of module type iron carbon filler described in 4 is required according to profit, it is characterized in that, described micro-electrolysis reaction layer is made up of back up pad (4-15-3) and module type filler (4-15), back up pad (4-15-3) is set side by side with module type filler (4-15), described module type filler (4-15) is by laminal filler (4-15-1), PVC bracket (4-15-2) forms, described PVC bracket (4-15-2) is cuboid-type, built-in draw-in groove, described laminal filler (4-15-1) is vertically inserted in draw-in groove, every layer of micro-electrolysis reaction layer has 600 ~ 1800 laminal fillers (4-15-1).

9. a using method for the multistage light electrolysis-Fenton's reaction device of module type iron carbon filler, step is:

A. the multistage light electrolysis-Fenton's reaction device of described a kind of module type iron carbon filler is built according to claim 1;

B. review and validate shore pipe (4-12) and be in closing condition;

C. valve, wastewater influent pump (1) and the H on a rising pipe (4-17) be communicated with light electrolysis unit (4-1) is closed ₂o ₂dosing pump (2), makes the light electrolysis unit (4-1) in light electrolysis-Fenton's reaction device (4) only have one to can be used in sewage disposal;

D. valve, wastewater influent pump (1) and the H on another rising pipe (4-17) be communicated with light electrolysis unit (4-1) is opened ₂o ₂dosing pump (2), makes the light electrolysis unit (4-1) in light electrolysis-Fenton's reaction device (4) only have one to can be used in sewage disposal; Open H ₂o ₂dosing pump (2) adds H in sewage ₂o ₂;

E. H is added ₂o ₂after end, the aerating apparatus (4-13) of light electrolysis unit (4-1) was at interval of 45 minutes aerations 10 ~ 15 minutes;

F. aerating apparatus (4-13) continuous aeration of oxidizing, flocculating unit (4-2) bottom, gas-water ratio 6 ~ 15:1; In light electrolysis unit (4-1) with Fe ²⁺the sewage center water inlet pipe (4-21) that flows to oxidizing, flocculating unit (4-2) by the rising pipe (4-17) on effluent trough (4-16) inner, entered the bottom of oxidizing, flocculating unit (4-2) by the umbrella shape scatterer (4-22) of center water inlet pipe (4-21) bottom; By aerating apparatus (4-13) entrance of oxidizing, flocculating unit (4-2) bottom, continuous aeration, gas-water ratio 6 ~ 15:1, by Fe in waste water ²⁺be oxidized to rear Fe ³⁺, remove the colourity of sewage;

G. when waste water level arrives in effluent trough (4-16), pH on-line computing model (4-31) in effluent trough (4-16), the pH value of monitoring waste water, automatically open NaOH when pH is less than 6 and respond to dosing pump (4-29), NaOH solution is added in center water inlet pipe (4-21), generates floss Fe (OH) ₃, sweep along pollutent to be deposited to sludge hopper (4-11) further inner;

H. the center water inlet pipe (4-21) that after oxidizing, flocculating unit (4-2) process, waste water flows into precipitation unit (4-3) by the rising pipe (4-17) of effluent trough (4-16) bottom right side is inner, enter into precipitation unit (4-3) bottom, further precipitate, swash plate (4-33) stops that the throw out in waste water precipitates further, be deposited to sludge hopper (4-11) inner, waste water level after process raises gradually is discharged by the rising pipe (4-17) in precipitation unit (4-3), enters subsequent processing process;

I. when in light electrolysis unit (4-1), oxidizing, flocculating unit (4-2) and precipitation unit (4-3), the sludge hopper (4-11) of arbitrary unit is inner be full of throw out time, open corresponding shore pipe (4-12) and carry out spoil disposal;

J. when the module type filler (4-15) that light electrolysis unit (4-1) is inner uses, or when stoppage in transit is safeguarded, wastewater influent pump (1) and H is closed ₂o ₂dosing pump (2), it is inner that waste water in light electrolysis unit (4-1) is all sent into oxidizing, flocculating unit (4-2) by the lift pump of opening installation on the rising pipe (4-17) of light electrolysis unit (4-1), close the valve on rising pipe (4-17) that light electrolysis unit (4-1) is therewith communicated with, open valve, wastewater influent pump (1) and H on the rising pipe (4-17) that is communicated with another light electrolysis unit (4-1) ₂o ₂dosing pump (2), guarantees that sewage disposal is uninterruptedly carried out continuously.

K. shift out and close wastewater influent pump (1) and H ₂o ₂the effluent trough (4-16) that the light electrolysis unit (4-1) of dosing pump (2) is inner, micro-electrolysis reaction layer in light electrolysis unit (4-1) is taken out successively, put into new micro-electrolysis reaction layer more successively, effluent trough (4-16) is positioned on light electrolysis unit (4-1), in order to next time, enable when light electrolysis unit (4-1) stoppage in transit used is safeguarded or module type filler (4-15) uses.

10. the using method of the multistage light electrolysis-Fenton's reaction of a kind of module type iron carbon filler according to claim 9, it is characterized in that, described micro-electrolysis reaction layer is made up of back up pad (4-15-3) and module type filler (4-15), back up pad (4-15-3) is set side by side with module type filler (4-15) described in 600 ~ 1800 module type fillers (4-15) by laminal filler (4-15-1), PVC bracket (4-15-2) forms, described PVC bracket (4-15-2) is cuboid-type, built-in draw-in groove, described laminal filler (4-15-1) is vertically inserted in draw-in groove,

In described laminal filler (4-15-1), the mass fraction of each component and order number are respectively:

Cast iron or pig scrap: 55 ~ 60 parts, 50 ~ 60 orders;

Coke powder: 30 ~ 35,60 ~ 70 orders;

Copper powder: 5 ~ 10,50 ~ 60 orders;

Binding agent: 3 ~ 5;

After high pressure compression moulding, enter stove fill nitrogen high temp calcining shaping, temperature is: 1050 ~ 1200 DEG C, and the firing time is: 4 ~ 5 hours.