CN110182989A - Based on electrolysis water body ammonium oxidation nitrate-nitrogen reduction integration denitrification device and method - Google Patents
Based on electrolysis water body ammonium oxidation nitrate-nitrogen reduction integration denitrification device and method Download PDFInfo
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- CN110182989A CN110182989A CN201910329035.2A CN201910329035A CN110182989A CN 110182989 A CN110182989 A CN 110182989A CN 201910329035 A CN201910329035 A CN 201910329035A CN 110182989 A CN110182989 A CN 110182989A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D49/00—Separating dispersed particles from gases, air or vapours by other methods
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/70—Treatment of water, waste water, or sewage by reduction
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/76—Treatment of water, waste water, or sewage by oxidation with halogens or compounds of halogens
- C02F1/766—Treatment of water, waste water, or sewage by oxidation with halogens or compounds of halogens by means of halogens other than chlorine or of halogenated compounds containing halogen other than chlorine
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B1/00—Electrolytic production of inorganic compounds or non-metals
- C25B1/01—Products
- C25B1/24—Halogens or compounds thereof
- C25B1/26—Chlorine; Compounds thereof
- C25B1/265—Chlorates
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/02—Temperature
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/14—NH3-N
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/15—N03-N
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/16—Total nitrogen (tkN-N)
Abstract
Based on electrolysis water body ammonium oxidation nitrate-nitrogen reduction integration denitrification device and method, it is related to water body denitrification device.Equipped with electrolyte electrolysis machine, gas-liquid separator, denitrification tank and electrolytic sewage machine；The denitrification tank is separated into ammonium oxidation pond and nitrate-nitrogen reduction pond by partition；The electrolyte electrolysis machine is equipped with water inlet, electrolyte outlet, electrolyte solution basin, DC power supply and electrolytic cell；The water inlet of electrolyte electrolysis machine is connect with electrolyte solution basin, the electrolyte outlet of electrolyte electrolysis machine and the electrolyte inlet of gas-liquid separator connect, and the water outlet of gas-liquid separator is connect with the ammonium oxidation pond water inlet of the water inlet of electrolytic sewage machine or denitrification tank；Valve is additionally provided with before the water inlet of ammonium oxidation pond；The hydrogen outlet of gas-liquid separator and the hydrogen inlet of denitrification tank connect；The water inlet of electrolytic sewage machine is connect with the water outlet of sewage and gas-liquid separator, and the water outlet of electrolytic sewage machine and the ammonium oxidation pond water inlet of denitrification tank connect.
Description
Technical field
The present invention relates to water body denitrification devices, more particularly, to based on electrolysis water body ammonium oxidation nitrate-nitrogen reduction integration
Nitrogen rejection facility and method.
Background technique
Existing sewage disposal technology removes water body total nitrogen, especially nitrate nitrogen, is an important technology difficult point.Currently,
The typical method for removing nitrate nitrogen both at home and abroad has physical method, physical-chemical process and bioanalysis etc. a variety of.Physical method such as hyperfiltration,
Capacitive adsorption method and electroosmose process.Physical-chemical process such as ion-exchange.Bioanalysis mainly utilizes nitrifier and denitrifying bacterium
Effect, by Ammonia Nitrification at nitrate nitrogen, nitrate nitrogen is then reduced into nitrogen, mainly have biological aerated filter and denitrification depth bed filter
Pond.Although the method for removing nitrate nitrogen is more, really apply to the substantially bioanalysis of production.Using bioanalysis with regard to necessary
Denitrification deep-bed filter or biological aerated filter are built, and at runtime must also continuous supplemental oxygen and carbon source.Anti- nitre
Change deep-bed filter or biological aerated filter is the very big structures of volume, not only occupied area is larger, and investment is more, and runs
It is costly, therefore, it is badly in need of that a kind of operating cost is low, removal of ammonia and nitrogen and the high-efficient device and method of nitrate nitrogen.
Summary of the invention
It is an object of the invention to provide for deficiency existing for existing ammonia oxidation of nitrogen and nitrate-nitrogen reduction nitrogen rejection facility
Based on electrolysis water body ammonium oxidation nitrate-nitrogen reduction integration denitrification device and method.
It is described that electrolyte electrolysis machine, gas-liquid are equipped with based on electrolysis water body ammonium oxidation nitrate-nitrogen reduction integration denitrification device
Separator, denitrification tank and electrolytic sewage machine；The denitrification tank is separated into ammonium oxidation pond and nitrate-nitrogen reduction pond by partition；Institute
Electrolyte electrolysis machine is stated equipped with water inlet, electrolyte outlet, electrolyte solution basin, DC power supply and electrolytic cell；Electrolyte electricity
The water inlet of solution machine is connect with electrolyte solution basin, the electrolyte outlet of electrolyte electrolysis machine and the electrolyte of gas-liquid separator
The ammonium oxidation pond water inlet of import connection, the water outlet of gas-liquid separator and the water inlet of electrolytic sewage machine or denitrification tank connects
It connects；Valve is additionally provided with before the water inlet of ammonium oxidation pond；The hydrogen outlet of gas-liquid separator and the hydrogen inlet of denitrification tank connect
It connects；The water inlet of electrolytic sewage machine is connect with the water outlet of sewage and gas-liquid separator, the water outlet of electrolytic sewage machine and denitrogenation
The ammonium oxidation pond water inlet in pond connects.
Cathode plate and anode plate are installed, the cathode plate and anode plate are mutual in the electrolytic cell of the electrolyte electrolysis machine
Staggeredly, cathode plate and anode plate are made of metal, conductive metal oxide, graphite or other electric conductors；Electrolyte
The electrolyte solution outlet of solution basin is connect with the water inlet of electrolyte electrolysis machine；The operating voltage of electrolyte electrolysis machine is 15
~1000V, operating current are 200~10000A；Optimum operating voltage be 45~300V, recommended current be 1500~
3000A。
When electrolyte electrolytic mechanism is for electrolyte, 2%~10% sodium chloride is added first into electrolyte solution basin
Solution opens solution feed pump, the conveying electrolyte into electrolyte electrolysis machine, and liquid electrolysis machine to be electrolysed exports when having electrolyte outflow,
Start electrolytic sewage machine DC power supply, operating voltage and operating current are adjusted to setting value.
The preparation principle of electrolyte is:
NaCl+H2O→NaClO+H2↑
The gas-liquid separator can be the container of cone, cylindrical body, cube or cuboid；The top of container is equipped with gas
Body outlet, gas outlet are additionally provided with control valve, air gauge, safety valve and gas flow meter；The bottom of container is equipped with electrolysis
Liquid outlet, electrolyte outlet are connect with the water inlet of electrolytic sewage machine.
The denitrification tank is equipped with shell and pond body, and isolation plate washer is equipped in pond body, and the isolation plate washer separates pond body
At ammonium oxidation pond and the nitrate-nitrogen reduction pond region Liang Ge；Water body containing ammonia nitrogen and nitrate nitrogen is through water inlet pipe and the 1st water inlet cloth
Hydrophone enters ammonium oxidation pond from the bottom of denitrification tank, the top in ammonium oxidation pond is flowed to from bottom to top, away from ammonium oxidation
Water outlet is equipped at the top of pond at 500~900mm, is connected to water pipe with the bottom in nitrate-nitrogen reduction pond, water inlet pipe is from top to bottom pacified
The bottom for being filled to nitrate-nitrogen reduction pond is connect with the 2nd water distributor；Be also equipped at the top of water inlet pipe hydrogen appendix and be installed on
Hydrogen gas pipe connection away from 450~650mm of nitrate-nitrogen reduction bottom of pond portion, the import of hydrogen appendix are connected with hydrogen supply device；
It is equipped with water body at 500~600mm away from the top in nitrate-nitrogen reduction pond to export, water outlet and drainpipe are with flanged joint；In ammonia
The bottom of nitrogen oxidation pond side is additionally provided with electrolyte oxidation agent import, and the oxidant for producing electrolyte electrolysis machine is sent into ammonia
Nitrogen oxidation pond；The sludge that the bottom of denitrification tank is additionally provided with cone shape is collected and blowdown apparatus.
Described based on electrolysis water body ammonium oxidation nitrate-nitrogen reduction integration denitrification device can be cylindrical body, cuboid or just
One of cube etc.；Steel plate, aluminium sheet, copper sheet, titanium plate, PVC plastic, PE plastics, glass reinforced plastic or coagulation can be used in the shell
Soil is made, and height from bottom to top is 6000~15000mm, and optimum height is 8500~12000mm.
The air inlet of the hydrogen supply device and the hydrogen outlet of gas-liquid separator connect.
The ammonium oxidation bottom of pond portion is also mountable water inlet distributor, and water inlet distributor is installed on the bottom in ammonium oxidation pond
At 200~500mm of portion.
It is described that a fouling cleaning dress is additionally provided with based on electrolysis water body ammonium oxidation nitrate-nitrogen reduction integration denitrification device
It sets, fouling cleaning device is equipped with cleaning agent storage bin, infusion pump, control valve and pipeline, and fouling cleaning device is separately connected electrolysis
Liquid electrolysis machine and electrolytic sewage machine, the fouling generated for cleaning.
It is described that electrolysis water body is based on using described based on electrolysis water body ammonium oxidation nitrate-nitrogen reduction integration denitrification method
Ammonium oxidation nitrate-nitrogen reduction integration denitrification device, the specific steps are as follows:
1) electrolytic preparation oxidant and hydrogen: electrolysis will be passed through containing 2%~10% sodium chloride or potassium chloride solution
The water inlet of liquid electrolysis machine enters in electrolyte electrolysis machine, and starting DC power supply is electrolysed to obtain electrolyte, and the operating voltage of electrolysis is
55~500V, electric current are 1500~5000A, and optimum operating voltage is 5~1000V, and electric current is 10~10000A；
NaCl+H2O→NaClO+H2↑
2) separation of oxidant and hydrogen: electrolysis gained electrolyte enter in gas-liquid separator be separated into hydrogen and containing compared with
The liquor natrii hypochloritis of strong oxidizing property；
3) water body is entered into ammonium oxidation bottom of pond portion, You Xiaxiang through water inlet distributor from the water inlet of ammonium oxidation bottom of pond portion
Upper flowing, ammonia nitrogen in water body in ammonium oxidation pond be electrolysed resulting oxidant reaction, be converted to nitrogen and water；In water body
Organic matter reacted with oxidizing agent sodium hypochlorite, be converted to carbon dioxide and water；
4) water body after ammonium oxidation by water pipe and is installed on nitre state at the top of ammonium oxidation pond through ammonium oxidation pond
The water inlet distributor that nitrogen restores bottom of pond portion flows into the bottom in nitrate-nitrogen reduction pond, flows from bottom to top, in nitrate-nitrogen reduction water
Nitrate nitrogen (NO in body3) and nitrite nitrogen (NO2) reacted with hydrogen, it is converted to nitrogen and water.
In ammonium oxidation pond, if the oxidant being added is hypochlorous acid or oxidant manufacturing device is sodium hypochlorite hair
When raw device, ammonia conversion nitrogen and hydrochloric acid, reaction route are as follows in water body:
NH3+HOCl—→NH2Cl+H2O (monochloro amine)
NH2Cl+HOCl—→NHCl2+H2O (dichlormaine)
2NH2Cl+HOCl—→N2↑+3HCl+H2O
In ammonium oxidation pond, if the oxidant being added is oxygen or uses electrolysis water oxygen or ozone, in water body
Ammonia be oxidized to nitrous state and nitrate nitrogen, reaction route is as follows:
2NH4 ++5O2—→2NO3-+4H2O
3NH4 ++5O3—→3NO3-+6H2O
In nitrate nitrogen hydrogen reduction pond, hydrogen in sewage nitrate nitrogen or nitrite nitrogen react, generate nitrogen and water, it is real
Existing denitrogenation purpose, reaction route are as follows:
NO3 -+H2—→NO2 -+H2O
2NO2 -+8H2—→N2↑+4H2O
Compared with existing denitrification denitrogenation device, the present invention has following remarkable advantage:
1, effluent quality is good
Total nitrogen of its water outlet of ammonium oxidation and nitrate-nitrogen reduction integration denitrification appliance arrangement of the invention not only can be with
Reach the total nitrogen index of IV class water quality of " water environment quality standard " GB3838-2002, and can be with the total nitrogen of III class water quality
Index, water quality is good, can be used as recycled water and directly utilizes.
2, the existing facility of sewage plant does not make any dismounting
It does not need to change existing sewage plant prior art stream using ammonium oxidation and nitrate-nitrogen reduction integration denitrification device
Journey, existing utility and the substantially all utilization of equipment not will cause original investment waste.
3, with low investment
Only increase ammonia nitrogen and nitrate nitrogen one nitrogen rejection facility equipment on the basis of the existing facility of sewage plant, only newly increase throwing
400~6,000,000 yuan/ten thousand tons of money is compared with denitrification filter pool, investment at least 2,000,000 yuan/ten thousand tons of reduction, and with low investment 25%.
4, existing denitrogenation technology is overturned, operating cost is low
Currently, carrying out advanced nitrogen, only a kind of technique of biological denitrificaion to sewage both at home and abroad, facility includes denitrification filter
Pond, sudden and violent gas biofilter etc., not only land occupation face is larger, and investment is more, and during whole service, needs to be continuously replenished charcoal source
(mainly methanol or sodium acetate), every reduction 1mg/L nitrogen, only about 0.03 yuan of medicament expense, operating cost is high, and it is big to control difficulty.
Ammonia nitrogen and nitrate nitrogen one nitrogen rejection facility denitrogenation of the invention does not need any equipment, does not need anyization yet other than equipment
Learn medicament, and every reduction 1mg/L nitrogen, it is only necessary to 0.02 degree of electricity, about 0.013 yuan of the electricity charge, operating cost only has the half of bioanalysis,
It is a kind of subversive denitrogenation technology.
5, land occupation is few
Ammonia nitrogen and the land occupation of nitrate nitrogen one nitrogen rejection facility equipment are about 40~80m2/ ten thousand tons, and the land occupation of biofilter is about
300m2/ ten thousand tons, land occupation is only a quarter of bioanalysis to 1/6th, and land occupation is few.
6, do not have to chemical agent, it is environmentally protective
Ammonia nitrogen and nitrate nitrogen one nitrogen rejection facility do not have to any chemical agent other than electricity consumption, environmentally protective.
7, flexible operation, reaction are fast, easily controllable
Currently, bioanalysis denitrogenation is prevailing technology.But bioanalysis reaction speed is slow, a debugging cycle lacks then several weeks,
Regulate and control very not flexible more then some months.In addition, bioanalysis (such as denitrification deep-bed filter) will not only control dosage, air quantity, temperature
Degree etc., there are many disadvantage.Use electrolysis nitrogen, if control electricity consumption, so that it may control denitrogenation depth, as long as and debug time it is several
A hour can be qualified, and the same day can be up to standard, and therefore, switch flexibly, needs just to open, do not need just to close.Meanwhile it can basis
Need to remove pollutant number, adjust electric current at any time, open open greatly it is small flexibly the pollutant to be removed is more, just open big, to remove
Lack, just open small, do not need just to close, save cost, reaction speed is fast, easy to operate, is easy to automatically control.
Detailed description of the invention
Fig. 1 is the knot of the present invention based on electrolysis water body ammonium oxidation nitrate-nitrogen reduction integration denitrification Installation practice
Structure composition schematic diagram.
Specific embodiment
Following embodiment will the present invention is further illustrated in conjunction with attached drawing.
As shown in Figure 1, described be equipped with electrolyte based on electrolysis water body ammonium oxidation nitrate-nitrogen reduction integration denitrification device
Electrolysis machine 1, gas-liquid separator 2, denitrification tank 3 and electrolytic sewage machine 4；The denitrification tank 3 is separated into ammonium oxidation pond by partition
3-1 and nitrate-nitrogen reduction pond 3-2；The electrolyte electrolysis machine is equipped with electrode group 1-2, electrolyte solution basin 1-4, direct current
Source 1-5 and electrolytic cell 1-6；The water inlet 1-1 of electrolyte electrolysis machine 1 is connect with electrolyte solution basin 1-4, electrolyte electrolysis
The electrolyte outlet 1-3 of machine 1 is connect with the electrolyte inlet 2-1 of gas-liquid separator 2, the water outlet 2-2 of gas-liquid separator 2 and dirt
The ammonium oxidation pond 3-1 water inlet 3-4 connection of the water inlet 4-1 or denitrification tank of water electrolysis machine 4；Ammonium oxidation pond water inlet 3-4
It is additionally provided with valve 3-3 before；The hydrogen outlet 2-4 of gas-liquid separator 2 is connect with the hydrogen inlet 3-9 of denitrification tank 3；Sewage electricity
The water inlet 4-1 of solution machine 4 is connect with the water outlet 2-2 of sewage and gas-liquid separator 2, the water outlet 4-3 of electrolytic sewage machine 4 and de-
The ammonium oxidation pond 3-1 water inlet 3-4 connection in nitrogen pond 3.The electrolytic sewage machine 4 is equipped with electrode group 4-2.
The denitrification tank 3 is equipped with shell and pond body, and isolation plate washer is equipped in pond body, and the isolation plate washer separates pond body
At two regions ammonium oxidation pond 3-1 and nitrate-nitrogen reduction pond 3-2；Water body containing ammonia nitrogen and nitrate nitrogen through water inlet pipe 3-6 and
1st water inlet distributor 3-5 enters ammonium oxidation pond from the bottom of denitrification tank, flows to the top of ammonium oxidation pond 3-1 from bottom to top
Portion is equipped with water outlet, with the bottom of water pipe and nitrate-nitrogen reduction pond 3-2 at the top of away from ammonium oxidation pond 3-1 at 500~900mm
Connection, water inlet pipe are from top to bottom installed to the bottom of nitrate-nitrogen reduction pond 3-2 and are connect with the 2nd water distributor 3-8；At the top of water inlet pipe also
Hydrogen appendix 3-9 is installed and is connected with the hydrogen gas pipe 3-7 away from 450~650mm of the nitrate-nitrogen reduction pond bottom 3-2 is installed on
It connects, the import of hydrogen appendix 3-9 is connected with hydrogen supply device 2；It is set at 500~600mm of top away from nitrate-nitrogen reduction pond 3-2
There is water body to export 3-10, water outlet and drainpipe are with flanged joint；Electrolyte is additionally provided in the bottom of the ammonium oxidation pond side 3-1
Oxidant inlet, the oxidant for producing electrolyte electrolysis machine are sent into ammonium oxidation pond 3-1；The bottom of denitrification tank is additionally provided with
The sludge of cone shape is collected and blowdown apparatus.In Fig. 1, label A is sludge outlet.
Yin, yang staggered electrode plate is installed in the electrolytic cell 1-6 of the electrolyte electrolysis machine 1；Cathode plate and anode plate
It is made of metal, conductive metal oxide, graphite or other electric conductors；The outlet of electrolyte solution basin 1-4 with
The water inlet 1-1 connection of electrolyte electrolysis machine 1；The operating voltage of electrolyte electrolysis machine 1 is 15~1000V, operating current 200
~10000A；Optimum operating voltage is 45~300V, and recommended current is 1500~3000A.
When the electrolyte electrolysis machine 1 prepares electrolyte, 2%~10% is added first into electrolyte solution basin 1-4
Sodium chloride solution, open solution feed pump, the input electrolyte into electrolyte electrolysis machine 1, there is electrolysis in liquid electrolysis machine 1 to be electrolysed outlet
When liquid stream goes out, starts electrolysis direct current power supply, operating voltage and operating current are adjusted to setting value.
The preparation principle of the electrolyte is:
NaCl+H2O→NaClO+H2↑
The gas-liquid separator can be the container of cone, cylindrical body, cube or cuboid；The top of container is equipped with gas
Body outlet, exit is additionally provided with control valve, air gauge, safety valve and gas flow meter；The bottom of container is equipped with electrolyte
Outlet, electrolyte outlet are connect with the water inlet of electrolytic sewage machine；Exit is additionally provided with control valve and flowmeter.
Described based on electrolysis water body ammonium oxidation nitrate-nitrogen reduction integration denitrification device can be cylindrical body, cuboid or just
One kind of cube；Steel plate, aluminium sheet, copper sheet, titanium plate, PVC plastic, PE plastics, glass reinforced plastic or concrete system can be used in the shell
It forms, height from bottom to top is 6000~15000mm, and optimum height is 8500~12000mm.
The air inlet of the hydrogen supply device and the hydrogen outlet of gas-liquid separator connect.
The ammonium oxidation bottom of pond portion is also mountable water inlet distributor, and water inlet distributor is installed on the bottom in ammonium oxidation pond
At 200~500mm of portion.
It is described that a fouling cleaning dress is additionally provided with based on electrolysis water body ammonium oxidation nitrate-nitrogen reduction integration denitrification device
It sets, fouling cleaning device is equipped with cleaning agent storage bin, infusion pump, control valve and pipeline, and fouling cleaning device is separately connected electrolysis
Liquid electrolysis machine and electrolytic sewage machine, the fouling generated for cleaning.
It is described that electrolysis water body is based on using described based on electrolysis water body ammonium oxidation nitrate-nitrogen reduction integration denitrification method
Ammonium oxidation nitrate-nitrogen reduction integration denitrification device, the specific steps are as follows:
1) electrolytic preparation oxidant and hydrogen: electrolysis will be passed through containing 2%~10% sodium chloride or potassium chloride solution
The water inlet of liquid electrolysis machine enters in electrolyte electrolysis machine, and starting DC power supply is electrolysed to obtain electrolyte, and the operating voltage of electrolysis is
55~500V, electric current are 1500~5000A, and optimum operating voltage is 5~1000V, and electric current is 10~10000A；
NaCl+H2O→NaClO+H2↑
2) separation of oxidant and hydrogen: electrolysis gained electrolyte enter in gas-liquid separator be separated into hydrogen and containing compared with
The liquor natrii hypochloritis of strong oxidizing property；
3) water body is entered into ammonium oxidation bottom of pond portion, You Xiaxiang through water inlet distributor from the water inlet of ammonium oxidation bottom of pond portion
Upper flowing, ammonia nitrogen in water body in ammonium oxidation pond be electrolysed resulting oxidant reaction, be converted to nitrogen and water；In water body
Organic matter reacted with oxidizing agent sodium hypochlorite, be converted to carbon dioxide and water；
4) water body after ammonium oxidation by water pipe and is installed on nitre state at the top of ammonium oxidation pond through ammonium oxidation pond
The water inlet distributor that nitrogen restores bottom of pond portion flows into the bottom in nitrate-nitrogen reduction pond, flows from bottom to top, in nitrate-nitrogen reduction water
Nitrate nitrogen (NO in body3) and nitrite nitrogen (NO2) reacted with hydrogen, it is converted to nitrogen and water.
In ammonium oxidation pond, if the oxidant being added is hypochlorous acid or oxidant manufacturing device is sodium hypochlorite hair
When raw device, ammonia conversion nitrogen and hydrochloric acid, reaction route are as follows in water body:
NH3+HOCl—→NH2Cl+H2O (monochloro amine)
NH2Cl+HOCl—→NHCl2+H2O (dichlormaine)
2NH2Cl+HOCl—→N2↑+3HCl+H2O
In ammonium oxidation pond, if the oxidant being added is oxygen or uses electrolysis water oxygen or ozone, in water body
Ammonia be oxidized to nitrous state and nitrate nitrogen, reaction route is as follows:
2NH4 ++5O2—→2NO3 -+4H2O
3NH4 ++5O3—→3NO3 -+6H2O
In nitrate nitrogen hydrogen reduction pond, hydrogen in sewage nitrate nitrogen or nitrite nitrogen react, generate nitrogen and water, it is real
Existing denitrogenation purpose, reaction route are as follows:
NO3 -+H2—→NO2 -+H2O
2NO2 -+8H2—→N2↑+4H2O。
Claims (10)
1. based on electrolysis water body ammonium oxidation nitrate-nitrogen reduction integration denitrification device, it is characterised in that be equipped with electrolyte and be electrolysed
Machine, gas-liquid separator, denitrification tank and electrolytic sewage machine；The denitrification tank is separated into ammonium oxidation pond and nitrate nitrogen also by partition
Former pond；The electrolyte electrolysis machine is equipped with DC power supply, electrolytic cell and electrolyte solution basin；The water inlet of electrolyte electrolysis machine
It is connect with electrolyte solution basin, the electrolyte outlet of electrolyte electrolysis machine and the electrolyte inlet of gas-liquid separator connect, gas
The water outlet of liquid/gas separator is connect with the ammonium oxidation pond water inlet of the water inlet of electrolytic sewage machine or denitrification tank；Ammonium oxidation pond
Valve is additionally provided with before water inlet；The hydrogen outlet of gas-liquid separator and the hydrogen inlet of denitrification tank connect；Electrolytic sewage machine
Water inlet connect with the water outlet of sewage and gas-liquid separator, the water outlet of electrolytic sewage machine and the ammonium oxidation pond of denitrification tank
Water inlet connection.
2. as described in claim 1 based on electrolysis water body ammonium oxidation nitrate-nitrogen reduction integration denitrification device, it is characterised in that
Cathode plate and anode plate are installed, the cathode plate and anode plate intermesh, yin in the electrolytic cell of the electrolyte electrolysis machine
Pole plate and anode plate are made of metal, conductive metal oxide, graphite or other electric conductors；Electrolyte solution basin
Electrolyte solution outlet connect with the water inlet of electrolyte electrolysis machine；The operating voltage of electrolyte electrolysis machine is 15~1000V,
Operating current is 200~10000A；Optimum operating voltage is 45~300V, and recommended current is 1500~3000A.
3. as described in claim 1 based on electrolysis water body ammonium oxidation nitrate-nitrogen reduction integration denitrification device, it is characterised in that
When electrolyte electrolytic mechanism is for electrolyte, 2%~10% sodium chloride solution is added first into electrolyte charging-tank, opens and supplies
Liquid pump, the input electrolyte into electrolyte electrolysis machine start electrolysis direct current when there is electrolyte outflow in liquid electrolysis machine outlet to be electrolysed
Operating voltage and operating current are adjusted to setting value by power supply.
4. as described in claim 1 based on electrolysis water body ammonium oxidation nitrate-nitrogen reduction integration denitrification device, it is characterised in that
The gas-liquid separator is the container of cone, cylindrical body, cube or cuboid；The top of container is equipped with gas vent, out
Control valve, air gauge, safety valve and gas flow meter are additionally provided at mouthful；The bottom of container is exported equipped with electrolyte, electrolysis
Liquid outlet is connect with the water inlet of electrolytic sewage machine；Exit is additionally provided with control valve and flowmeter.
5. as described in claim 1 based on electrolysis water body ammonium oxidation nitrate-nitrogen reduction integration denitrification device, it is characterised in that
The denitrification tank is equipped with shell and pond body, and isolation plate washer is equipped in pond body, and pond body is separated into ammonia nitrogen oxygen by the isolation plate washer
Change pond and the nitrate-nitrogen reduction pond region Liang Ge；Water body containing ammonia nitrogen and nitrate nitrogen is through water inlet pipe and the 1st water inlet distributor from de-
The bottom in nitrogen pond enters ammonium oxidation pond, flows to the top in ammonium oxidation pond from bottom to top, 500 at the top of away from ammonium oxidation pond
It is equipped with water outlet at~900mm, is connected to water pipe with the bottom in nitrate-nitrogen reduction pond, water inlet pipe is from top to bottom installed to nitrate nitrogen
The bottom in reduction pond is connect with the 2nd water distributor；Be also equipped at the top of water inlet pipe hydrogen appendix and be installed on away from nitrate nitrogen also
The hydrogen gas pipe of former 450~650mm of bottom of pond portion connects, and the import of hydrogen appendix is connected with hydrogen supply device；Away from nitrate nitrogen
It restores and is equipped with water body outlet at the 500~600mm of top in pond, water outlet and drainpipe are with flanged joint；In ammonium oxidation pond one
The bottom of side is additionally provided with electrolyte oxidation agent import, and the oxidant for producing electrolyte electrolysis machine is sent into ammonium oxidation pond；
The sludge that the bottom of denitrification tank is additionally provided with cone shape is collected and blowdown apparatus.
6. as described in claim 1 based on electrolysis water body ammonium oxidation nitrate-nitrogen reduction integration denitrification device, it is characterised in that
For one of cylindrical body, cuboid or square.
7. as claimed in claim 5 based on electrolysis water body ammonium oxidation nitrate-nitrogen reduction integration denitrification device, it is characterised in that
The shell is formed using steel plate, aluminium sheet, copper sheet, titanium plate, PVC plastic, PE plastics, glass reinforced plastic or concrete for making, from bottom
Height to top is 6000~15000mm, and optimum height is 8500~12000mm.
8. as claimed in claim 5 based on electrolysis water body ammonium oxidation nitrate-nitrogen reduction integration denitrification device, it is characterised in that
The air inlet of the hydrogen supply device and the hydrogen outlet of gas-liquid separator connect.
9. as described in claim 1 based on electrolysis water body ammonium oxidation nitrate-nitrogen reduction integration denitrification device, it is characterised in that
The ammonium oxidation bottom of pond portion is also equipped with water inlet distributor, water inlet distributor be installed on the bottom 200 in ammonium oxidation pond~
At 500mm；
It is described that a fouling cleaning device is additionally provided with based on electrolysis water body ammonium oxidation nitrate-nitrogen reduction integration denitrification device, it ties
Dirty cleaning device is equipped with cleaning agent storage bin, infusion pump, control valve and pipeline, and fouling cleaning device is separately connected electrolyte electrolysis
Machine and electrolytic sewage machine, the fouling generated for cleaning.
It is based on as described in claim 1~9 10. being used based on electrolysis water body ammonium oxidation nitrate-nitrogen reduction integration denitrification method
It is electrolysed water body ammonium oxidation nitrate-nitrogen reduction integration denitrification device, it is characterised in that specific step is as follows for the method:
1) electrolytic preparation oxidant and hydrogen: will be electric by electrolyte containing 2%~10% sodium chloride or potassium chloride solution
The water inlet of solution machine enters in electrolyte electrolysis machine, and starting DC power supply is electrolysed to obtain electrolyte, and the operating voltage of electrolysis is 55~
500V, electric current are 1500~5000A, and optimum operating voltage is 5~1000V, and electric current is 10~10000A；
NaCl+H2O→NaClO+H2↑
2) separation of oxidant and hydrogen: electrolysis gained electrolyte, which enters in gas-liquid separator, is separated into hydrogen and containing stronger oxygen
The liquor natrii hypochloritis for the property changed；
3) water body is entered into ammonium oxidation bottom of pond portion through water inlet distributor from the water inlet of ammonium oxidation bottom of pond portion, flowed from bottom to top
Dynamic, the ammonia nitrogen in water body, with the resulting oxidant reaction of electrolysis, is converted to nitrogen and water in ammonium oxidation pond；Having in water body
Machine object is reacted with oxidizing agent sodium hypochlorite, is converted to carbon dioxide and water；
4) water body after ammonium oxidation by water pipe and is installed on nitrate nitrogen also at the top of ammonium oxidation pond through ammonium oxidation pond
The water inlet distributor of former bottom of pond portion flows into the bottom in nitrate-nitrogen reduction pond, flows from bottom to top, in nitrate-nitrogen reduction water body
Nitrate nitrogen and nitrite nitrogen reacted with hydrogen, be converted to nitrogen and water.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116282462A (en) * | 2022-10-08 | 2023-06-23 | 南京大学盐城环保技术与工程研究院 | Photocatalysis device for advanced treatment of biochemical tail water and photocatalysis process thereof |
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| CN106477822A (en) * | 2016-11-17 | 2017-03-08 | 上海晶宇环境工程股份有限公司 | The device of electrolysis synchronous nitration denitrification denitrogenation improved process |
| CN106567103A (en) * | 2016-11-08 | 2017-04-19 | 中广核工程有限公司 | Co-production method and system for sodium hypochlorite and high-purity hydrogen |
| CN108911316A (en) * | 2018-09-03 | 2018-11-30 | 大渊环境技术（厦门）有限公司 | A kind of plasma nitrogen rejection facility and its application method |
| CN210313789U (en) * | 2019-04-23 | 2020-04-14 | 皓禹(厦门)环保有限公司 | Integrated denitrification device based on ammonia nitrogen oxidation and nitrate nitrogen reduction of electrolytic water body |
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| CN106567103A (en) * | 2016-11-08 | 2017-04-19 | 中广核工程有限公司 | Co-production method and system for sodium hypochlorite and high-purity hydrogen |
| CN106477822A (en) * | 2016-11-17 | 2017-03-08 | 上海晶宇环境工程股份有限公司 | The device of electrolysis synchronous nitration denitrification denitrogenation improved process |
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| CN210313789U (en) * | 2019-04-23 | 2020-04-14 | 皓禹(厦门)环保有限公司 | Integrated denitrification device based on ammonia nitrogen oxidation and nitrate nitrogen reduction of electrolytic water body |
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| CN116282462A (en) * | 2022-10-08 | 2023-06-23 | 南京大学盐城环保技术与工程研究院 | Photocatalysis device for advanced treatment of biochemical tail water and photocatalysis process thereof |
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