CN204022519U - A kind of for the water treatment device except the nitric nitrogen that anhydrates - Google Patents
A kind of for the water treatment device except the nitric nitrogen that anhydrates Download PDFInfo
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- CN204022519U CN204022519U CN201420480291.4U CN201420480291U CN204022519U CN 204022519 U CN204022519 U CN 204022519U CN 201420480291 U CN201420480291 U CN 201420480291U CN 204022519 U CN204022519 U CN 204022519U
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Abstract
The utility model is a kind of for the water treatment device except the nitric nitrogen that anhydrates, comprise an electrolyzer, direct supply and a water storage water dispensing apparatus, electrolyzer is connected with a direct supply, on electrolyzer, be provided with a water-in and a water outlet, water storage water dispensing apparatus is connected with a peristaltic pump, peristaltic pump is connected with water-in, water outlet is connected with water storage water dispensing apparatus, water storage water dispensing apparatus is connected with an air-washer, in electrolyzer, be provided with negative electrode, anode and granule electrode, the negative electrode of electrolyzer, anode respectively with negative electrode, the anodic bonding of direct supply.Granule electrode is made up of gac and foamed metal copper, and gac and foamed metal copper are filled in slot electrode.The utility model is particle filled composite electrode in electrolysis reactor, mass transfer enhancement process, having improved the electroreduction speed of nitrate at negative electrode, is the device that a kind of high-efficiency environment friendly degree of depth is removed nitrate nitrogen in water body, can be widely used in waterworks and boats and ships and process the fields such as sanitary sewage.
Description
Technical field
The utility model belongs to chemical field, relates in particular to a kind of water treatment device, is a kind of for the water treatment device except the nitric nitrogen that anhydrates specifically.
Background technology
Day by day frequent along with mankind's activity, the drinking water source ground in global range, as underground water, river, Lake Water and other surface water have all been subject to serious nitrate-N pollution, and wherein underground water is particularly serious.The tap water that long-term drinking nitrate content exceeds standard will produce detrimentally affect to human health.Nitrate is ingested after human body, in stomach, be reduced to nitrite, nitrite can directly be oxidized to ferric ion the ferrous ion being rich in oxyphorase in blood, reduce the oxygen carrier capacity of blood, thereby initiation various diseases, as methemoglobinemia, hepatic injury and cancer etc., resistibility, not as good as baby's methemoglobinemia that is more easy to get of adult, is medically commonly called as " blue baby's disease ".In addition, in agricultural runoff and municipal sewage plant's tail water, often contain the nitrate of high density, these high density nitrogenous compounds are to the discharge in environment, aggravate the eutrophication process in river, lake, cause water quality deterioration, biological living environment is formed to potential threat, as species diversity minimizing, ecosystem degradation etc.Therefore, the nitrate in control water body is very necessary.
More to nitrate-N pollution Study on treatment technology in water at present, mainly divide physics, chemistry and biological three broad aspect.Physics denitrogenation comprises membrane separation technique and ion exchange technique.The system operation cost such as membrane separation technique investment is large, film replacing are high, and the dense salt wastewater treatment producing is more difficult; The regeneration efficiency of ion exchange technique is low, regenerates too frequent, also can produce a large amount of regeneration waste liquids.Chemistry denitrogenation comprises Zero-valent Iron reduction denitrogenation and hydrogen catalytic reduction denitrogenation, and Zero-valent Iron reduction need to be added chemical substance, produces by product, reduces actual denitration effect.Biological denitrificaion comprises autotrophy and heterotrophic denitrification.The organic carbon source adding in the denitrification process of biological denitrificaion has part and remains in water outlet, denitrifying bacteria can cause the microbial contamination of water outlet, produce excess sludge and hazardous and noxious substances, post-processed more complicated, and water quality, temperature, pH etc. be there are certain requirements, go out water concentration winter and be difficult to be guaranteed.Therefore, each method all has certain weak point in actual application, and the method for developing new high-efficiency environment friendly processing nitric nitrogen waste water is imperative.
In recent years, electrochemical method is removed pollutant in water because its environmental protection receives much concern, and has had abroad widely and has studied with electrochemical electrolysis reduction nitric nitrogen.This technology is carried out at normal temperatures and pressures, has that capacity usage ratio is high, safety, environmental protection, an advantage such as easy and simple to handle, is considered to one of technology of most possible industrialization.The electrode materials adopting when electrolysis has a variety of, and anode adopts inactive, conductive material conventionally, as IrO
2/ Ti, plumbous oxide, graphite etc.; Negative electrode adopts the monometallics such as palladium, platinum, silver, copper, gold, tin, zinc conventionally, the electrode after making can reductive water in nitric nitrogen.But nitrate ion, with negative charge, is difficult to diffuse to cathode surface in electric field, what mainly rely on is random mass transfer, greatly reduces the reaction efficiency of electrolysis.
Utility model content
For above-mentioned technological deficiency of the prior art, it is a kind of for the water treatment device except the nitric nitrogen that anhydrates that the utility model provides, and described is this for solving the inefficient technical problem of nitric nitrogen in available technology adopting electrochemical electrolysis reductive water except the water treatment device of the nitric nitrogen that anhydrates.
In order to achieve the above object, the utility model has adopted following technical scheme:
A kind of for the water treatment device except the nitric nitrogen that anhydrates, comprise an electrolyzer, direct supply and a water storage water dispensing apparatus, on described electrolyzer, be provided with a water-in and a water outlet, described water storage water dispensing apparatus is connected with a peristaltic pump by first pipeline, described peristaltic pump is connected with described water-in by a second pipe, described water outlet is connected with described water storage water dispensing apparatus by the 3rd pipeline, described water storage water dispensing apparatus is connected with an air-washer by the 4th pipeline, in described electrolyzer, be provided with negative electrode, anode and granule electrode, the negative electrode of described electrolyzer, anode respectively with the negative electrode of described direct supply, anodic bonding.
Further, described anode is Ti/RuO
2, described negative electrode is copper.
Further, described granule electrode is made up of gac and foamed metal copper, and described gac and foamed metal copper are filled in described slot electrode.
Further, described granule electrode is that volume ratio is gac and the foamed metal copper that 1:1 fills.
Further, the aperture of described foamed metal copper is 0.8-1.2 mm, and the particle diameter of described gac is 3-7 mm, and packing height is 23 cm.
Further, in described electrolyzer, described water-in is in the lower end of electrolyzer, and described water outlet is in the upper end of electrolyzer, and in described like this electrolyzer, the flow direction of water is upflowing, makes to contain nitric nitrogen waste water and can be full of equably whole electrolyzer.
Further, described water storage water dispensing apparatus is connected with a whipping appts.Concrete, described whipping appts is a magnetic stirring apparatus, is provided with a magnetic stir bar in described water storage water dispensing apparatus.Wherein, described water storage water distribution glass jar volume is 4 L, and wherein placing one piece of diameter is 9 mm, and length is the magnetic stir bar of 50 mm, and be placed on described magnetic stirring apparatus, can fully mix the waste water in processing water and the described water storage water distribution glass jar refluxing from described electrolyzer.
Further, on the first described pipeline, connect a sampling line by threeway, on described sampling line, be provided with a valve.
Further, in described direct supply, be provided with electric current display screen.
Further, in described peristaltic pump, be provided with rotating speed display screen.
Wherein, two pole plate sizes of described electrolyzer are 173 mm × 0.5, mm × 42 mm, and polar plate spacing is 40 mm.
Wherein, the electric current that described direct supply provides is 0.1-10 peace, and voltage is 0.1-30 volt.
In the utility model, connection between described water storage water distribution glass jar and described electrolyzer adopts return-flow type, and described waste water is promoted by described peristaltic pump, is flowed into by described bottom of electrolytic tank, the waste water that electrolysis treatment is crossed is flowed out by described upper part of the electrolytic cell, is back in described water storage water distribution glass jar.
Working process of the present utility model is: by the first pipeline and peristaltic pump, the waste water in water storage water dispensing apparatus is inputted to electrolyzer, utilize the three-dimensional electrode electrolysis waste water in electrolyzer, waste water after electrolysis is inputted in water storage water dispensing apparatus again, and the gas producing in water storage water dispensing apparatus is exported by scrubbing bottle.
Traditional three-diemsnional electrode adopts gac as filler, but single-activity carbon filling material helps limited for electro-reduction process.Foam copper is a kind of Multifunction material that is uniform-distribution with a large amount of connections or non-intercommunicating pore hole in copper matrix.The electroconductibility of foam copper and ductility are good, can use it for preparation battery cathode (carrier) material, support of the catalyst and electromagnetic shielding material.Than common three-diemsnional electrode, foamed metal has not only increased the specific surface area of negative electrode, and mass transfer enhancement ability, has largely improved processing power.So the utility model proposes particle filled composite electrode mass transfer enhancement process in two-dimentional electrolysis reactor, to improve the electroreduction speed of nitrate at negative electrode.
The utility model provides the device of a kind of three-diemsnional electrode except nitric nitrogen, and the high porosity that it utilizes foam copper, has strengthened the mass transfer of nitric nitrogen in electrolyzer, and removes nitric nitrogen by electrooxidation reductive action high-efficiency environment friendly ground.Due to electrolytic action, the nitrate reduction that is adsorbed on negative electrode and granule electrode surface becomes the products such as low valent ammonia nitrogen and nitrogen, thereby is removed from former water.This device can be removed nitric nitrogen effectively, has that processing efficiency is high, environmental protection, is easy to the features such as automatization control.
The three-diemsnional electrode relating to according to the utility model, except nitric nitrogen device, utilizes the two filler mass transfer enhancement processes of gac and foam copper, utilizes on this basis electrochemical redox effect to remove nitrate nitrogen in water body, reduces the harm of nitric nitrogen to human body.Experimental results show that, the utility model can be removed nitrate nitrogen in water body by high-efficiency environment friendly, the loading level of the copper of its foamed metal is the half of cubic capacity, after water sample 18 h of electrolysis 4 L, nitric nitrogen goes out water concentration and is less than 1 mg N/L, affected by temperature and pH less, easily is automated control, be the device that a kind of high-efficiency environment friendly degree of depth is removed nitrate nitrogen in water body, can be widely used in waterworks and boats and ships and process the fields such as sanitary sewage.
Brief description of the drawings
Fig. 1 is a kind of structural representation for the water treatment device except the nitric nitrogen that anhydrates of the present utility model.
Fig. 2 is the structural representation that two-dimensional electrode removes nitric nitrogen.
Embodiment
Following examples are elaborated the utility model by reference to the accompanying drawings.
In following examples, nitric nitrogen preparation waste water used is by analytically pure NaNO
3, NaCl and Na
2sO
4institute joins, and pH value is by KH
2pO
4regulate with NaOH, all reagent is buied by traditional Chinese medicines group.The utility model actual waste water used is the well water that has precipitated 24 h.
Embodiment 1
This comparative example's two-dimensional electrode, except the device of nitric nitrogen, as shown in Figure 2, comprises: electrolyzer 22, for the treatment of waste water; Peristaltic pump 33, for to electrolyzer transport wastewater; Direct supply 11, for powering to electrolyzer 22; Water storage water distribution glass jar 55, the waste water of crossing for reception & disposal and the waste water mixing is provided; Magnetic stirring apparatus 66, for mixing the waste water of water storage water distribution glass jar; And scrubbing bottle 77, for absorbing from water storage water distribution glass jar escaping gas.Water storage water distribution glass jar 55 is placed on magnetic stirring apparatus 66.Direct supply 11 is connected by copper conductor with electrolyzer 22, electrolyzer 22, peristaltic pump 33, water storage water distribution glass jar 55 are connected by teflon hose with scrubbing bottle 77, nitric nitrogen waste water pumps into electrolyzer 22 from water storage water distribution glass jar 55, after electrolysis treatment, be back to water storage water distribution glass jar 55, in the middle of peristaltic pump 33 and electrolyzer 22, be provided with sampling line 44 in order to the each moment water outlet of sampling and measuring nitrate, sampling line 44 is provided with valve.
In this comparative example, the cubic capacity of electrolyzer 22 is 1.6 L, and useful volume is 1.6 L.Two pole plate sizes of electrolyzer 22 are 173 mm × 0.5, mm × 42 mm, and polar plate spacing is 40 mm.Direct supply 11 is provided with electric current display screen, and its electric current providing is 0.1-10 A, and voltage is 0.1-30 V.Peristaltic pump 33 is provided with rotating speed display screen.
Waste water 4 L that preparation nitric nitrogen and chlorine ion concentration are respectively 28.0 mg N/L, 300 mg/L pack in water storage water distribution glass jar 55, add the KH of 27.2 g
2pO
4it is 7 left and right that the NaOH solid of solid and 3.8 g regulates water sample pH, utilizes Na
2sO
4regulate specific conductivity;
A method of utilizing two-dimensional electrode to remove to anhydrate middle nitric nitrogen, comprises the following steps:
As shown in Figure 2, connect device; Open magnetic stirring apparatus 66 and peristaltic pump 33, regulating peristaltic pump 33 be Peak Flow Rate 100 rad/min, makes waste water flow in time in electrolyzer 22 reaction, and processing water is back in glass jar 55 in time from electrolyzer 22, and with cylinder in waste water fully mix; Open direct supply 11, controlling its outward current is 2.0 A.Between at regular intervals, open valve, sample from getting pipeline 44, meanwhile measure the voltage between pole plate, question response completely after pH, nitrate and total nitrogen concentration to all samples measure.
Adopt national standard analytical procedure to analyze the nitrate in electrolysis treatment water outlet, after water sample 18 h of result demonstration electrolysis 4 L, nitric nitrogen is down to 17.0 mg N/L from 28.0 mg N/L, and after processing, water outlet does not reach the requirement (surface water <10 mg N/L) of national water quality standard for drinking water (GB5749-2006) for nitric nitrogen.In waste water, nitric nitrogen clearance is 39.3 %, and nitric nitrogen is removed and met first _ order kinetics equation, and its speed is 3.7 mg N/h.Adopt national standard analytical procedure to analyze the total nitrogen concentration in electrolysis treatment water outlet, result shows that in water outlet, total nitrogen concentration is 17.5 mg N/L, and clearance is 37.5 %.
Embodiment 2
Three-diemsnional electrode in the present embodiment, except the device of ammonia nitrogen, as shown in Figure 1, comprises: electrolyzer 2, for the treatment of waste water; Peristaltic pump 3, for to electrolyzer transport wastewater; Direct supply 1, for powering to electrolyzer 2; Water storage water distribution glass jar 7, the waste water of crossing for reception & disposal and the waste water mixing is provided; Magnetic stirring apparatus 8, for mixing the waste water of water storage water distribution glass jar; And scrubbing bottle 9, for absorbing from water storage water distribution glass jar escaping gas.Wherein, in electrolyzer 2, the negative electrode of three-diemsnional electrode and the top of anode are connected with direct supply, and anode is Ti/RuO
2, described negative electrode is copper, the granule electrode of three-diemsnional electrode is 1:1(V/V) and gac 5 and the foamed metal copper 6 of filling, gac 5 particle diameters are 3-7 mm, and foamed metal copper 6 apertures are 1 mm, and it is filled in electrolyzer 2, and packing height is 230 mm.Water storage water distribution glass jar 7 is placed on magnetic stirring apparatus 8.Direct supply 1 is connected by copper conductor with electrolyzer 2, electrolyzer 2, peristaltic pump 3, water storage water distribution glass jar 7 are connected by teflon hose with scrubbing bottle 9, nitric nitrogen waste water pumps into electrolyzer 2 from water storage water distribution glass jar 7, after electrolysis treatment, be back to water storage water distribution glass jar 7, in the middle of peristaltic pump 3 and electrolyzer 2, be provided with sampling line 4 in order to the each moment water outlet of sampling and measuring nitrate, sampling line 4 is provided with valve.
In the present embodiment, the cubic capacity of electrolyzer 2 is 1.6 L, and useful volume is 1.0 L.Two pole plate sizes of electrolyzer 2 are 173 mm × 0.5, mm × 42 mm, and polar plate spacing is 40 mm.Direct supply 1 is provided with electric current display screen, and its electric current providing is 0-10 A, and voltage is 0-30 V.Peristaltic pump 3 is provided with rotating speed display screen.
The principle of electrochemical reducing denitrogenation is exactly macroscopic view, logical certain electric current in electrolyzer 2, due to electrolytic action, the nitrate reduction that is adsorbed on negative electrode and granule electrode surface becomes the products such as low valent ammonia nitrogen and nitrogen, thereby is removed from former water.Analyze from microcosmic angle, in electrolytic vessel, nitric nitrogen is reduced and may have generated the intermediate product such as nitrite and azanol.The principal reaction mechanism of nitric nitrogen degraded is suc as formula shown in (1)-(5):
Cathode surface:
NO
3 - + H
2O + 2e
-→ NO
2 - + 2OH
- (1)
NO
2 - + 4H
2O + 4e
- → NH
2OH + 5OH
- (2)
NH
2OH + H
2O + 2e
- → NH
3 + 2OH
- (3)
NO
2 - + 5H
2O + 6e
- → NH
3 + 7OH
- (4)
NO
2 - + 2H
2O + 3e
- → (1/2) N
2 + 4OH
- (5)
Experiment showed, under the condition that has chlorion in system, electrochemical reduction product ammonia nitrogen is innocuous gas nitrogen by reactive chlorine indirect oxidation, and in ie in solution, chlorion is oxidized to Cl
2, Cl
2hClO, ClO that water-soluble generation oxidisability is extremely strong
-, by the ammonia nitrogen oxidation removal producing in waste water.Principal reaction mechanism is suc as formula shown in (6)-(9):
Anode: 2Cl
-→ Cl
2+ 2e
-(6)
In solution: Cl
2+ H
2o → HClO+H
++ Cl
-(7)
HClO + (2/3) NH
3 → (1/3) N
2 + H
2O + H
+ + Cl
- (8)
HClO + (2/3) NH
4 + → (1/3) N
2 + H
2O + (5/3)H
+ + Cl
- (9)
Electrolytic reduction step is divided into mass transfer in liquid phase process, preposition conversion (absorption) etc., and nitrate ion is reduced at cathode surface.But it is difficult to be adsorbed in cathode surface as negatively charged ion, what mainly rely on is random mass transfer, greatly reduces the reaction efficiency of electrolysis, and ratedeterming step is mass transfer in liquid phase.Facts have proved, 6 of foamed metal copper have flourishing pore texture, and have certain hardness, can be used as granule electrode and are filled in reactor, increase the mass transfer ability of nitric nitrogen in electric field, improve electrolytic reaction efficiency.Gac 5, as the second filler, can be avoided foam copper 6 to move to anode under hydraulic action on the one hand and cause short circuit; Certain active oxidation reduction site is provided on the other hand, has strengthened electrochemical action effect.
When the three-diemsnional electrode of employing the present embodiment removes the device of nitric nitrogen, as shown in Figure 1, first open magnetic stirring apparatus 8 and peristaltic pump 3, regulating magnetic stirring apparatus 8 rotating speeds is 650 rad/min, regulating peristaltic pump 3 is Peak Flow Rate 100 rad/min, and waste water is sent into described electrolyzer 2 by water storage water distribution glass jar 7; Before experiment, in electrolyzer 2, fill gac 5 and foam copper 6 as granule electrode, ensure the efficiency of electrolysis with this; Open direct supply 1, controlling its outward current is 2.0 A; Waste water enters after electrolyzer 2, the flourishing pore texture of the foamed metal copper 6 in three-diemsnional electrode, increase the mass transfer ability of nitric nitrogen in electric field, thereby strengthen nitric nitrogen and be adsorbed to the probability of the concurrent raw reduction reaction of electrode surface, allowed nitrate ion be able to must be reduced on copper surface low valent nitrogenous substances as ammonia nitrogen and nitrogen fast; Chlorion in anode place electrolysis water body in three-diemsnional electrode, produces HClO and ClO
-the ammonia nitrogen that oxidation removal electrolysis produces, making final product is innocuous gas nitrogen; The waste water of processing is back to water storage water distribution glass jar 7 by electrolyzer 2 top outlets, is mixed, then send into electrolyzer 2 by peristaltic pump 3 by magnetic stirring apparatus 8.
The three-diemsnional electrode relating to according to the present embodiment is except nitric nitrogen device, and the high porosity that it utilizes foam copper, has strengthened the mass transfer of nitric nitrogen in electrolyzer, and removes nitric nitrogen by electrooxidation reductive action high-efficiency environment friendly ground.Due to electrolytic action, the nitrate reduction that is adsorbed on negative electrode and granule electrode surface becomes the products such as low valent ammonia nitrogen and nitrogen, thereby is removed from former water; , in solution, there is Cl in recycling electrochemical oxidation process
-time, can electrolysis produce Cl at electrolyzer 2 anode places
2, Cl
2the HClO of water-soluble further generation strong oxidizing property and ClO
-, the ammonia nitrogen that both produce in can oxidation removal solution, making final product is innocuous gas nitrogen.This device utilizes electrooxidation reductive action to remove nitrate nitrogen in water body on reinforcing mass transfer basis, affected by temperature and pH less, easily be automated control, be the new device that a kind of high-efficiency environment friendly degree of depth is removed nitrate nitrogen in water body, and can be widely used in the field such as waterworks and boats and ships processing sanitary sewage.
Embodiment 3
Waste water 4 L that preparation nitric nitrogen and chlorine ion concentration are respectively 28.0 mg N/L, 300 mg/L pack in water-storing glass cylinder 7, add the KH of 27.2 g
2pO
4it is 7 left and right that the NaOH solid of solid and 3.8 g regulates water sample pH, utilizes Na
2sO
4regulate specific conductivity;
A method of utilizing three-diemsnional electrode to remove to anhydrate middle nitric nitrogen, comprises the following steps:
As shown in Figure 1, connect device; Open magnetic stirring apparatus 8 and peristaltic pump 3, regulating peristaltic pump 3 be Peak Flow Rate 100 rad/min, makes waste water flow in time in electrolyzer 2 reaction, and processing water is back in glass jar 7 in time from electrolyzer 2, and with cylinder in waste water fully mix; Open direct supply 1, controlling its outward current is 2.0 A.Between at regular intervals, open valve, sample from getting pipeline 4, meanwhile measure the voltage between pole plate, question response completely after pH, nitrate and total nitrogen concentration to all samples measure.
Adopt national standard analytical procedure to analyze the nitrate in electrolysis treatment water outlet, after water sample 18 h of result demonstration electrolysis 4 L, nitric nitrogen is down to 0.8 mg N/L from 28.0 mg N/L, and after processing, water outlet reaches the requirement (surface water <10 mg N/L) of national water quality standard for drinking water (GB5749-2006) for nitric nitrogen.In 4L waste water, nitric nitrogen clearance reaches 97.1%, and nitric nitrogen is removed and met first _ order kinetics equation, and its speed is 23.0 mg N/h, is 6.2 times of two-dimensional electrode.Adopt national standard analytical procedure to analyze the total nitrogen concentration in electrolysis treatment water outlet, result shows that in water outlet, total nitrogen concentration is 0.8 mg N/L, and clearance is 97.1%.
Embodiment 4
Waste water 4 L that preparation nitric nitrogen and chlorine ion concentration are respectively 45.0 mg N/L, 300 mg/L pack in water-storing glass cylinder 7, add the KH of 27.2 g
2pO
4it is 7 left and right that the NaOH solid of solid and 3.8 g regulates water sample pH, utilizes Na
2sO
4regulate specific conductivity;
A method of utilizing three-diemsnional electrode to remove to anhydrate middle nitric nitrogen, comprises the following steps:
As shown in Figure 1, connect device; Open magnetic stirring apparatus 8 and peristaltic pump 3, regulating peristaltic pump 3 be Peak Flow Rate 100 rad/min, makes waste water flow in time in electrolyzer 2 reaction, and processing water is back in glass jar 7 in time from electrolyzer 2, and with cylinder in waste water fully mix; Open direct supply 1, controlling its outward current is 2.0 A.Between at regular intervals, open valve, sample from getting pipeline 4, meanwhile measure the voltage between pole plate, question response completely after pH, nitrate and total nitrogen concentration to all samples measure.
Adopt national standard analytical procedure to analyze the nitrate in electrolysis treatment water outlet, after water sample 18 h of result demonstration electrolysis 4 L, nitric nitrogen is down to 0.9 mg N/L from 45.0 mg N/L, and after processing, water outlet reaches the requirement (surface water <10 mg N/L) of national water quality standard for drinking water (GB5749-2006) for nitric nitrogen.In 4L waste water, nitric nitrogen clearance reaches 98.0 %, and nitric nitrogen is removed and met first _ order kinetics equation, and its speed is 41.6 mg N/h.Adopt national standard analytical procedure to analyze the total nitrogen concentration in electrolysis treatment water outlet, result shows that in water outlet, total nitrogen concentration is 0.9 mg N/L, and clearance is 98.0 %.
Embodiment 5
Waste water 4 L that preparation nitric nitrogen and chlorine ion concentration are respectively 45.0 mg N/L, 0 mg/L pack in water-storing glass cylinder 7, add the KH of 27.2 g
2pO
4it is 7 left and right that the NaOH solid of solid and 3.8 g regulates water sample pH, utilizes Na
2sO
4regulate specific conductivity;
A method of utilizing three-diemsnional electrode to remove to anhydrate middle nitric nitrogen, comprises the following steps:
As shown in Figure 1, connect device; Open magnetic stirring apparatus 8 and peristaltic pump 3, regulating peristaltic pump 3 be Peak Flow Rate 100 rad/min, makes waste water flow in time in electrolyzer 2 reaction, and processing water is back in glass jar 7 in time from electrolyzer 2, and with cylinder in waste water fully mix; Open direct supply 1, controlling its outward current is 2.0 A.Between at regular intervals, open valve, sample from getting pipeline 4, meanwhile measure the voltage between pole plate, question response completely after pH, nitrate and total nitrogen concentration to all samples measure.
Adopt national standard analytical procedure to analyze the nitrate in electrolysis treatment water outlet, after water sample 18 h of result demonstration electrolysis 4 L, nitric nitrogen is down to 1.0 mg N/L from 45.0 mg N/L, and after processing, water outlet reaches the requirement (surface water <10 mg N/L) of national water quality standard for drinking water (GB5749-2006) for nitric nitrogen.In 4L waste water, nitric nitrogen clearance reaches 97.8 %, and nitric nitrogen is removed and met first _ order kinetics equation, and its speed is 37.2 mg N/h.Adopt national standard analytical procedure to analyze the total nitrogen concentration in electrolysis treatment water outlet, result shows that in water outlet, total nitrogen concentration is 17.2 mg N/L, and clearance is 61.8 %.
Embodiment 6
Actual waste water is well water, gets 4 L and pack in water-storing glass cylinder 7 after precipitation 24 h.In well water, nitric nitrogen, chlorion and ammonia nitrogen concentration are respectively 20.0 mg N/L, 100.0 mg/L and 2.8 mg/L, and pH is 7.2.Regulate the specific conductivity of actual waste water with sodium sulfate;
A method of utilizing three-diemsnional electrode to remove to anhydrate middle nitric nitrogen, comprises the following steps:
As shown in Figure 1, connect device; Open magnetic stirring apparatus 8 and peristaltic pump 3, regulating peristaltic pump 3 be Peak Flow Rate 100 rad/min, makes actual waste water flow in time in electrolyzer 2 reaction, and processing water is back in glass jar 7 in time from electrolyzer 2, and with cylinder in waste water fully mix; Open direct supply 1, controlling its outward current is 2.0 A.Between at regular intervals, open valve, sample from getting pipeline 4, meanwhile measure the voltage between pole plate, question response completely after pH, nitrate and total nitrogen concentration to all samples measure.
Adopt national standard analytical procedure to analyze the nitrate in electrolysis treatment water outlet, after actual waste water 18 h of result demonstration electrolysis 4 L, nitric nitrogen is down to 1.2 mg N/L from 20.0 mg N/L, and after processing, water outlet reaches the requirement (surface water <10 mg N/L) of national water quality standard for drinking water (GB5749-2006) for nitric nitrogen.In 4 L waste water, nitric nitrogen clearance reaches 94.2 %, and nitric nitrogen is removed and met first _ order kinetics equation, and its speed is 13.0 mg N/h.Adopt national standard analytical procedure to analyze the total nitrogen concentration in electrolysis treatment water outlet, result shows that in water outlet, total nitrogen concentration is 1.7 mg N/L, and clearance is 91.5 %.
Claims (10)
1. one kind for except anhydrating the water treatment device of nitric nitrogen, comprise an electrolyzer, direct supply and a water storage water dispensing apparatus, it is characterized in that: on described electrolyzer, be provided with a water-in and a water outlet, described water storage water dispensing apparatus is connected with a peristaltic pump by first pipeline, described peristaltic pump is connected with described water-in by a second pipe, described water outlet is connected with described water storage water dispensing apparatus by the 3rd pipeline, described water storage water dispensing apparatus is connected with an air-washer by the 4th pipeline, in described electrolyzer, be provided with negative electrode, anode and granule electrode, the negative electrode of described electrolyzer, anode respectively with the negative electrode of described direct supply, anodic bonding.
2. as claimed in claim 1 a kind of for the water treatment device except the nitric nitrogen that anhydrates, it is characterized in that: described anode is Ti/RuO
2, described negative electrode is copper.
3. as claimed in claim 1 a kind ofly it is characterized in that: described granule electrode is made up of gac and foamed metal copper for except anhydrating the water treatment device of nitric nitrogen, in the slot electrode described in described gac and foamed metal copper are filled in.
4. as claimed in claim 3 a kind of for the water treatment device except the nitric nitrogen that anhydrates, it is characterized in that: described granule electrode is that volume ratio is gac and the foamed metal copper that 1:1 fills.
5. as claimed in claim 3 a kind ofly it is characterized in that: the aperture of described foamed metal copper is 0.8-1.2 mm for except anhydrating the water treatment device of nitric nitrogen, the particle diameter of described gac is 3-7 mm.
6. as claimed in claim 1 a kind of for the water treatment device except the nitric nitrogen that anhydrates, it is characterized in that: in described electrolyzer, described water-in is in the lower end of electrolyzer, and described water outlet is in the upper end of electrolyzer.
7. as claimed in claim 1 a kind of for the water treatment device except the nitric nitrogen that anhydrates, it is characterized in that: described water storage water dispensing apparatus is connected with a whipping appts.
8. as claimed in claim 1 a kind of for the water treatment device except the nitric nitrogen that anhydrates, it is characterized in that: on the first described pipeline, be connected with a sampling line by threeway, on described sampling line, be provided with a valve.
9. as claimed in claim 1 a kind of for the water treatment device except the nitric nitrogen that anhydrates, it is characterized in that: in described direct supply, be provided with electric current display screen.
10. as claimed in claim 1 a kind of for the water treatment device except the nitric nitrogen that anhydrates, it is characterized in that: in described peristaltic pump, be provided with rotating speed display screen.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104163479A (en) * | 2014-08-25 | 2014-11-26 | 上海理工大学 | Method and device for removing nitrate nitrogen in water by using three-dimensional electrodes |
| CN104944531A (en) * | 2015-06-25 | 2015-09-30 | 清华大学 | Method for efficiently removing nitrate in underground water through Ti nanometer electrode |
| CN105198046A (en) * | 2015-09-21 | 2015-12-30 | 清华大学 | Method for efficiently removing nitrate from underground water through Ti-graphene electrode |
-
2014
- 2014-08-25 CN CN201420480291.4U patent/CN204022519U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104163479A (en) * | 2014-08-25 | 2014-11-26 | 上海理工大学 | Method and device for removing nitrate nitrogen in water by using three-dimensional electrodes |
| CN104163479B (en) * | 2014-08-25 | 2016-06-29 | 上海理工大学 | A kind of method adopting three-diemsnional electrode to remove nitrate nitrogen in water and device thereof |
| CN104944531A (en) * | 2015-06-25 | 2015-09-30 | 清华大学 | Method for efficiently removing nitrate in underground water through Ti nanometer electrode |
| CN104944531B (en) * | 2015-06-25 | 2017-04-05 | 清华大学 | A kind of method that Ti nano-electrodes efficiently remove nitrate in groundwater |
| CN105198046A (en) * | 2015-09-21 | 2015-12-30 | 清华大学 | Method for efficiently removing nitrate from underground water through Ti-graphene electrode |
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