CN110078178A - A kind of strong ammonia wastewater cyclic electrolysis treatment process and equipment - Google Patents
A kind of strong ammonia wastewater cyclic electrolysis treatment process and equipment Download PDFInfo
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- CN110078178A CN110078178A CN201910391507.7A CN201910391507A CN110078178A CN 110078178 A CN110078178 A CN 110078178A CN 201910391507 A CN201910391507 A CN 201910391507A CN 110078178 A CN110078178 A CN 110078178A
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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
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
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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
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- C02F2101/16—Nitrogen compounds, e.g. ammonia
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Abstract
The invention discloses a kind of strong ammonia wastewater cyclic electrolysis treatment process, include the following steps: S1, the waste water of high-concentration ammonia-nitrogen is sent into buffer tank, progress chlorine root concentration and temperature adjusting；S2, the waste water for conveying high-concentration ammonia-nitrogen with current stabilization delivery pump with stable flow are electrolysed to electrolysis unit；S3, stop water tank is flowed into from electrolysis device outlet, the reaction was continued；S4, cyclic electrolysis, removal of ammonia and nitrogen are carried out；S6, finally as test value < 1mg/L of the second ammonia nitrogen determination instrument, outflow cyclic electrolysis treated solution；S7, step S2 to S6 is repeated, or repeats step S1 to S6.Using the strong ammonia wastewater cyclic electrolysis treatment process of invention, have the characteristics that equipment investment is small, take up an area less, installation is simple and convenient to operate, the waste water of high-concentration ammonia-nitrogen (>500mg/L) is set to reach discharge standard (<1mg/L) by cyclic electrolysis, under the premise of not increasing equipment cost, the processing of high-concentration ammonia nitrogenous wastewater is most economically realized；And it is high-efficient.
Description
Technical field
The present invention relates to Waste Water From Fire Power Plant processing method and apparatus fields, and in particular to a kind of strong ammonia wastewater
Cyclic electrolysis treatment process and equipment.
Background technique
Thermal power plant in process of production, generates various wastewater, typically there is slag spilling water, chemical wastewater, reverse osmosis concentrated
Draining, precision processing regenerative wastewater, desulfurization wastewater etc..
The source of coal-burning power plant's ammonia nitrogen waste water includes carrying ammonia nitrogen in (1) desulfurization wastewater: desulfurization waste water quality can be because of fire coal
Power plant generates certain difference using the difference of coal, lime stone and sulfur removal technology.But under normal conditions, desulfurization wastewater is in weak
Acidity, salt content are high and contain a large amount of Cl-, SO42-, suspended matter and micro heavy, additionally contain certain density ammonia.It is de-
Ammonia nitrogen concentration in sulphur waste water is mainly influenced by the escaping of ammonia rate in SCR denitration reaction device, and the escaping of ammonia rate is higher, in desulfurization wastewater
Ammonia nitrogen concentration it is higher.(2) carry ammonia nitrogen in precision processing regenerative wastewater: yin, yang resin mixes in regenerative system storage tower
It is sent after even to precision processing demineralizer, either negative resin or positive resin, there is certain exchange capacity, this is just determined
Precision processing demineralizer has certain water production in periodic mode.After any one failure in yin, yang resin, operations staff just stops
Corresponding precision processing demineralizer is transported, after the spare demineralizer that puts into operation, the hybrid resin of failure is delivered to external regeneration device
It separated, regenerated, is recycled.After positive and negative efficiency lost resin, regenerated respectively with 4% hydrochloric acid solution and sodium hydroxide solution,
In cationic regenerative process, NH4+ is swapped out, and is entered in waste water with regeneration liquid waste, therefore, coal-burning power plant's precision processing regeneration
The ammonium hydroxide that ammonia nitrogen in waste water is added from therrmodynamic system, and in precision processing regenerative wastewater ammonia nitrogen concentration by precision processing mixed bed
The factors such as water production in periodic mode, resin property influence.
Existence form of the ammonia nitrogen in industrial wastewater is mainly NH3-N and NH4+-N, is mutually converted between the two, currently,
The minimizing technology of industrial wastewater ammonia nitrogen is broadly divided into physical method, chemical method, physico-chemical process and bioanalysis, and wherein physical-chemical process, which has, blows
De- method, chemical precipitation method, absorption method, embrane method, chemical oxidization method etc., bioanalysis mainly has nitration denitrification method, Anammox
Method etc..
In recent years, under the guide of " categorised collection, ladder reuse " policy, thermal power industry has formd a variety of processing
The mature technology route of most of waste water, but still have using desulfurization wastewater, precision processing regenerative wastewater as the tail end wastewater (ammonia nitrogen of representative
Waste water), salt content is high, and water-quality constituents is complicated, it is difficult to dense especially for high ammonia nitrogen by conventional treatment process treatment for reuse
The waste water for spending (> 500mg/L), when handling coal-fired power plant's high concentration (> 500mg/L) ammonia-containing water using electrochemical oxidation process,
It, often can not be by the ammonia nitrogen removal in waste water by single electrolysis in the case where not increasing electrolysis series or expanding equipment scale
To qualified discharge standard.
Therefore, it is badly in need of a kind of efficient, low energy consumption tail end wastewater New Method for Processing and equipment, realizes full reuse or the row of reduction
It puts, it is qualified with lower cost reuse or processing.
It based on the above situation, can the invention proposes a kind of strong ammonia wastewater cyclic electrolysis treatment process and equipment
Effectively solve problem above.
Summary of the invention
The purpose of the present invention is to provide a kind of strong ammonia wastewater cyclic electrolysis treatment process and equipment.Using invention
Strong ammonia wastewater cyclic electrolysis treatment process, land occupation small with equipment investment less, the spy that is simple and convenient to operate of installation
Point, most prominent advantage are: by cyclic electrolysis make high-concentration ammonia-nitrogen (>500mg/L) waste water reach discharge standard (<
1mg/L), under the premise of not increasing equipment cost, the processing of high-concentration ammonia nitrogenous wastewater is most economically realized；And it is high-efficient；Electricity
The electrolytic cell for solving device uses parallel, and detachable, and user can contain ammonia level according to waste water, freely set
Set the electrolysis slot number of processing waste water.
In order to solve the above technical problems, present invention provide the technical scheme that
A kind of strong ammonia wastewater cyclic electrolysis treatment process, includes the following steps:
The waste water feeding buffer tank of S1, high-concentration ammonia-nitrogen, carry out chlorine root concentration and temperature are adjusted；
S2, No.1 valve, No. two valves, No. three valves are opened, closes No. six valves, No. ten valves and No. seven valves, opens
Dynamic current stabilization delivery pump is strong in electric current with current stabilization delivery pump with the waste water of stable flow conveying high-concentration ammonia-nitrogen to electrolysis unit
Under degree and chlorine root co-catalysis, it is electrolysed, the ammonia nitrogen in waste water is changed into the innocuous substances such as nitrogen and hydrogen；
S3, stop water tank is flowed into from electrolysis device outlet, the oxidizing substance and remaining ammonia nitrogen for generating electrolysis after
Continuous reaction；
S4, No. four valves and No. five valves are opened, closes No. two valves, starting first circulation pump carries out cyclic electrolysis, takes off
Except ammonia nitrogen；
S6, finally as test value < 1mg/L of the second ammonia nitrogen determination instrument, close No. four valves and No. five valves, and stop
First circulation pump, opens No. ten valves, outflow cyclic electrolysis treated solution；
S7, step S2 to S6 is repeated, or repeats step S1 to S6；
Wherein, in step S2, with current stabilization delivery pump with the waste water of stable flow conveying high-concentration ammonia-nitrogen to electrolysis unit,
The volume for conveying the waste water of high-concentration ammonia-nitrogen is the 1/2~2/3 of the stop water tank capacity；The anode material of the electrolysis unit
For Ti/lrO2-Ta2O5, cathode material is industrially pure titanium, maximum voltage 54V, maximum current 260A, dischargeable capacity (electrolysis
Slot (parallel connection) total measurement (volume)) it is 30L.
Using the strong ammonia wastewater cyclic electrolysis treatment process of invention, have equipment investment is small, land occupation less, installation letter
Single, easy to operate feature, most prominent advantage are: making the waste water of high-concentration ammonia-nitrogen (> 500mg/L) by cyclic electrolysis
Reach discharge standard (< 1mg/L), under the premise of not increasing equipment cost, most economically realizes the place of high-concentration ammonia nitrogenous wastewater
Reason；And it is high-efficient；The electrolytic cell of electrolysis unit uses parallel, and detachable, user can be according to waste water
Containing ammonia level, the electrolysis slot number of processing waste water is freely set.
Preferably, further include following steps:
S8, the electrode of electrolysis unit is cleaned: electrolysis unit is connected to motor pickling system both ends, acid can be formed
Wash circuit；Motor pickling system includes acid cleaning tank and circulating pump；It is 5~8% that mass percent is prepared in the acid cleaning tank
Hydrochloric acid solution, close No. two valves, No. three valves and No. five valves, open No. six valves and No. seven valves, start circulating pump
Carry out cycle pickling.
The hydrochloric acid solution that mass percent is 5~8% carries out cycle pickling to electrode by 1 circulating pump, can be quickly extensive
Overlying electrode activity.
Preferably, it in step S2, in step S1, carries out chlorine root concentration and adjusts, chlorine root concentration is adjusted to 8000~
8500mg/L。
Inventor is by a large amount of experiment discovery: certain density ammonia nitrogen waste water passes through under constant current density effect
When electrolysis unit, the removal effect of ammonia nitrogen is influenced significant by initial chlorine root concentration is stopped, and the initial chlorine root of waste water is higher, ammonia nitrogen
Removal effect is better；But chlorine root excessive concentration is easy to cause electrode corrosion, the present invention is by being adjusted to 8000 for chlorine root concentration
~8500mg/L not only ensures removal effect, but also can extend the service life of electrode.
Preferably, in step S2, in step S1, temperature adjusting is carried out, temperature is adjusted to 20~25 DEG C.
Inventor is by a large amount of experiment discovery: under identical residence time and current density condition, the removal efficiency of ammonia nitrogen
Slowly decline with the rising of temperature, when temperature rises to close to 38 DEG C, the removal efficiency of ammonia nitrogen declines rapidly；The present invention passes through
Temperature is adjusted to 20~25 DEG C, it is ensured that the effect of ammonia nitrogen in removing Waste Water From Fire Power Plant.
Preferably, in step S2, in step S2, residence time of the Waste Water From Fire Power Plant in the electrolysis unit is 1
~1.5min.
Inventor is by a large amount of experiment discovery: the identical ammonia nitrogen waste water of component passes through under the effect of identical current density
Electrolysis unit, the removal effect of ammonia nitrogen are influenced significant by the residence time；Residence time of the waste water in electrolysis unit is longer, ammonia
The removal effect of nitrogen is better；But the residence time is too long, will lead to that energy consumption is excessively high, and cost increase, the present invention passes through thermal power generation
Residence time of factory's waste water in the electrolysis unit is 1~1.5 min, can both guarantee the removal effect of good ammonia nitrogen,
It again can be with energy saving.
Preferably, in step S2, in step S2, in 40V, current density control exists for the voltage control of the electrolysis unit
250A/m2。
Inventor is by a large amount of experiment discovery: certain density ammonia nitrogen waste water being made (to keep stopping with constant flow
Time is constant) by electrolysis unit, current density is bigger, and the removal effect of ammonia nitrogen is better；But current density is excessive, will lead to
Energy consumption is excessively high, cost increase, and the present invention is by the way that by the voltage control of the electrolysis unit, in 40V, current density is controlled in 250A/
M2 can not only guarantee the removal effect of good ammonia nitrogen, but also can be with energy saving.
The present invention also provides a kind of a kind of high concentrations based on preceding strong ammonia wastewater cyclic electrolysis treatment process
Ammonia-containing water cyclic electrolysis processing equipment, including the buffer tank, electrolysis unit and stop water tank being sequentially communicated；
The buffer tank is connected to wastewater feed pipe；Current stabilization conveying is provided between the buffer tank and electrolysis unit
Pump, current stabilization delivery pump are electrically connected with frequency converter, and the frequency converter is used for the working frequency of regulating flow-stabilizing delivery pump, with stable stream
Transport wastewater is measured to the electrolysis unit；
The first ammonia nitrogen determination instrument, temperature measuring set and No. two valves are provided on pipeline at the electrolysis device inlet；
The electrolysis unit is electrically connected with rectifier cabinet, and the rectifier cabinet becomes direct current for 380V alternating current and passes through electricity
Pole, and adjust the voltage between the size of current by electrode, electrode；
The stop tank top is provided with exhaust outlet；
The second ammonia nitrogen determination instrument is provided on the pipeline stopped at tank outlet；
Pipeline at the electrolysis device inlet and the pipeline after the second ammonia nitrogen determination instrument respectively with circulation pipe
The both ends on road are connected to；Both ends are respectively arranged with No. four valves and No. five valves on the circulation line, and middle part is provided with first and follows
Ring pump.
Strong ammonia wastewater cyclic electrolysis processing equipment of the invention, land occupation small with investment is less, installation is simple, grasps
Make convenient feature.
Preferably, the electrolysis unit includes at least two electrolytic cell, and the electrolytic cell is cylindrical shape, between each other
Connection type is parallel connection.
Preferably, the electrolysis unit includes 3 electrolytic cells, and the electrolytic cell is cylindrical shape, is connected between each other
Mode is parallel connection.
Preferably, the bottom of the electrolysis unit is provided with the first sewage draining exit and No. eight valves, and the first sewage draining exit passes through
Pipeline is connected to cesspool.
Preferably, agitating device and electric heater are provided on the buffer tank；The electric heater and controller electricity
Connection, the controller is for controlling the progress heated at constant temperature or firm power heating.
Preferably, feed opening is provided on the buffer tank, bottom is provided with No.1 valve.
Preferably, chloride ion tester and total dissolved solid detector are provided on the buffer tank.
Preferably, the electrolysis device inlet and exit are connected to motor pickling system both ends respectively, can form pickling
Circuit；Motor pickling system includes No. six valves and No. seven valves at both ends, the acid cleaning tank at middle part and second circulation pump；It is described
Acid cleaning tank is for preparing and storing acid solution, to carry out cycle pickling；It is provided on the pipeline stopped at tank entry
No. three valves.
Preferably, the bottom of the acid cleaning tank is provided with the second sewage draining exit and No. nine valves, and the second sewage draining exit passes through pipe
Road is connected to cesspool.
Preferably, flowmeter is provided on the pipeline in current stabilization delivery pump exit.
Compared with prior art, the present invention have the following advantages that and the utility model has the advantages that
Using the strong ammonia wastewater cyclic electrolysis treatment process of invention, have equipment investment is small, land occupation less, installation letter
Single, easy to operate feature, most prominent advantage are: making the waste water of high-concentration ammonia-nitrogen (> 500mg/L) by cyclic electrolysis
Reach discharge standard (< 1mg/L), under the premise of not increasing equipment cost, most economically realizes the place of high-concentration ammonia nitrogenous wastewater
Reason；And it is high-efficient；The electrolytic cell of electrolysis unit uses parallel, and detachable, user can be according to waste water
Containing ammonia level, the electrolysis slot number of processing waste water is freely set.
The present invention makes high ammonia nitrogen by cyclic electrolysis using discontinuity Inlet and outlet water using a kind of cyclic electrolysis processing equipment
The waste water of concentration (>500mg/L) reaches discharge standard (<1mg/L).The present invention controls ammonia nitrogen removal amount according to circulation duration,
Guarantee the water quality of water outlet.Under the premise of not increasing equipment cost, the processing of high-concentration ammonia nitrogenous wastewater is most economically realized.
Under the catalysis of chlorine root, the net reaction that mainly occurs:
Detailed description of the invention
Fig. 1 is the structural schematic diagram of invention.
Specific embodiment
It is right combined with specific embodiments below in order to make those skilled in the art more fully understand technical solution of the present invention
The preferred embodiments of the invention are described, but should not be understood as the limitation to this patent.
Test method described in following embodiments or test method are unless otherwise specified conventional method；The reagent
And material is obtained from routine business approach, or prepare in conventional manner unless otherwise specified.
In the present invention, it for the electrolysis unit, the specific structure that is not specifically limited, working principle and may relate to
And control mode, the space layout mode arrived uses the conventional selection of this field, belongs to the prior art, is not construed as this
It where the innovative point of invention, to those skilled in the art, will be understood by, the invention patent is not done further specific
Expansion is described in detail.
The frequency converter, the first ammonia nitrogen determination instrument, temperature measuring set, rectifier cabinet, the second ammonia nitrogen determination instrument, controller, chlorine
The technical characteristics such as ion measurement instrument, total dissolved solid detector and flowmeter (component units/element of the invention), such as without spy
Different explanation, obtains from routine business approach, or be made in conventional manner, specific structure, working principle and may relate to
The control mode, the space layout mode that arrive use the conventional selection of this field, are not construed as innovative point institute of the invention
It to those skilled in the art, will be understood by, the invention patent is not done further specific expansion and is described in detail
Embodiment 1:
A kind of strong ammonia wastewater cyclic electrolysis treatment process, includes the following steps:
The waste water feeding buffer tank 1 of S1, high-concentration ammonia-nitrogen, carry out chlorine root concentration and temperature are adjusted；
S2, the valve 82, three of No.1 valve 81, two valve 83 is opened, closes 86, No. ten 810 and of valve of No. six valves
No. seven valves 87 start current stabilization delivery pump 51, convey the waste water of high-concentration ammonia-nitrogen extremely with stable flow with current stabilization delivery pump 51
Electrolysis unit 2 is electrolysed, the ammonia nitrogen in waste water is changed into nitrogen and hydrogen etc. under current strength and chlorine root co-catalysis
Innocuous substance；
S3, the oxidizing substance and remaining ammonia nitrogen for stopping water tank 3, generating electrolysis are flowed into from 2 exit of electrolysis unit
The reaction was continued；
S4, No. four valves 84 and No. five valves 85 are opened, closes No. two valves 82, starting first circulation pump 53 is followed
Ring electrolysis, removal of ammonia and nitrogen；
S6, finally as test value < 1mg/L of the second ammonia nitrogen determination instrument 64, close No. four valves 84 and No. five valves 85,
And stop first circulation pump 53, open No. ten valves 810, outflow cyclic electrolysis treated solution；
S7, step S2 to S6 is repeated, or repeats step S1 to S6；
Wherein, in step S2, with current stabilization delivery pump 51 with the waste water of stable flow conveying high-concentration ammonia-nitrogen to being electrolysed dress
2 are set, the volume for conveying the waste water of high-concentration ammonia-nitrogen is the 0.55 of stop 3 volume of water tank；The anode material of the electrolysis unit 2
Matter is Ti/lrO2-Ta2O5, and cathode material is industrially pure titanium, maximum voltage 54V, maximum current 260A, dischargeable capacity (electricity
Solve slot (parallel connection) total measurement (volume)) it is 30L.
In the present embodiment, further include following steps:
S8, the electrode of electrolysis unit 2 is cleaned: electrolysis unit 2 is connected to motor pickling system both ends, can be formed
Pickling circuit；Motor pickling system includes acid cleaning tank 4 and circulating pump 52；Mass percent is prepared in the acid cleaning tank 4 is
5% hydrochloric acid solution closes 82, No. three valves 83 of No. two valves and No. five valves 85, opens No. six valves 86 and No. seven valves
87, starting circulating pump 52 carries out cycle pickling.
In the present embodiment, it in step S2, in step S1, carries out chlorine root concentration and adjusts, chlorine root concentration is adjusted to
8000mg/L。
In the present embodiment, in step S2, in step S1, temperature adjusting is carried out, temperature is adjusted to 20 DEG C.
In the present embodiment, in step S2, in step S2, stop of the Waste Water From Fire Power Plant in the electrolysis unit 2
Time is 1.5min.
In the present embodiment, in step S2, in step S2, the voltage of the electrolysis unit 2 is controlled in 40V, current density
Control is in 250A/m2.
Embodiment 2:
A kind of strong ammonia wastewater cyclic electrolysis treatment process, includes the following steps:
The waste water feeding buffer tank 1 of S1, high-concentration ammonia-nitrogen, carry out chlorine root concentration and temperature are adjusted；
S2, the valve 82, three of No.1 valve 81, two valve 83 is opened, closes 86, No. ten 810 and of valve of No. six valves
No. seven valves 87 start current stabilization delivery pump 51, convey the waste water of high-concentration ammonia-nitrogen extremely with stable flow with current stabilization delivery pump 51
Electrolysis unit 2 is electrolysed, the ammonia nitrogen in waste water is changed into nitrogen and hydrogen etc. under current strength and chlorine root co-catalysis
Innocuous substance；
S3, the oxidizing substance and remaining ammonia nitrogen for stopping water tank 3, generating electrolysis are flowed into from 2 exit of electrolysis unit
The reaction was continued；
S4, No. four valves 84 and No. five valves 85 are opened, closes No. two valves 82, starting first circulation pump 53 is followed
Ring electrolysis, removal of ammonia and nitrogen；
S6, finally as test value < 1mg/L of the second ammonia nitrogen determination instrument 64, close No. four valves 84 and No. five valves 85,
And stop first circulation pump 53, open No. ten valves 810, outflow cyclic electrolysis treated solution；
S7, step S2 to S6 is repeated, or repeats step S1 to S6；
Wherein, in step S2, with current stabilization delivery pump 51 with the waste water of stable flow conveying high-concentration ammonia-nitrogen to being electrolysed dress
2 are set, the volume for conveying the waste water of high-concentration ammonia-nitrogen is the 0.65 of stop 3 volume of water tank；The anode material of the electrolysis unit 2
Matter is Ti/lrO2-Ta2O5, and cathode material is industrially pure titanium, maximum voltage 54V, maximum current 260A, dischargeable capacity
(electrolytic cell (parallel connection) total measurement (volume)) is 30L.
In the present embodiment, further include following steps:
S8, the electrode of electrolysis unit 2 is cleaned: electrolysis unit 2 is connected to motor pickling system both ends, can be formed
Pickling circuit；Motor pickling system includes acid cleaning tank 4 and circulating pump 52；Mass percent is prepared in the acid cleaning tank 4 is
8% hydrochloric acid solution closes 82, No. three valves 83 of No. two valves and No. five valves 85, opens No. six valves 86 and No. seven valves
87, starting circulating pump 52 carries out cycle pickling.
In the present embodiment, it in step S2, in step S1, carries out chlorine root concentration and adjusts, chlorine root concentration is adjusted to
8500mg/L。
In the present embodiment, in step S2, in step S1, temperature adjusting is carried out, temperature is adjusted to 25 DEG C.
In the present embodiment, in step S2, in step S2, stop of the Waste Water From Fire Power Plant in the electrolysis unit 2
Time is 1min.
In the present embodiment, in step S2, in step S2, the voltage of the electrolysis unit 2 is controlled in 40V, current density
Control is in 250A/m2.
Embodiment 3:
A kind of strong ammonia wastewater cyclic electrolysis treatment process, includes the following steps:
The waste water feeding buffer tank 1 of S1, high-concentration ammonia-nitrogen, carry out chlorine root concentration and temperature are adjusted；
S2, the valve 82, three of No.1 valve 81, two valve 83 is opened, closes 86, No. ten 810 and of valve of No. six valves
No. seven valves 87 start current stabilization delivery pump 51, convey the waste water of high-concentration ammonia-nitrogen extremely with stable flow with current stabilization delivery pump 51
Electrolysis unit 2 is electrolysed, the ammonia nitrogen in waste water is changed into nitrogen and hydrogen etc. under current strength and chlorine root co-catalysis
Innocuous substance；
S3, the oxidizing substance and remaining ammonia nitrogen for stopping water tank 3, generating electrolysis are flowed into from 2 exit of electrolysis unit
The reaction was continued；
S4, No. four valves 84 and No. five valves 85 are opened, closes No. two valves 82, starting first circulation pump 53 is followed
Ring electrolysis, removal of ammonia and nitrogen；
S6, finally as test value < 1mg/L of the second ammonia nitrogen determination instrument 64, close No. four valves 84 and No. five valves 85,
And stop first circulation pump 53, open No. ten valves 810, outflow cyclic electrolysis treated solution；
S7, step S2 to S6 is repeated, or repeats step S1 to S6；
Wherein, in step S2, with current stabilization delivery pump 51 with the waste water of stable flow conveying high-concentration ammonia-nitrogen to being electrolysed dress
2 are set, the volume for conveying the waste water of high-concentration ammonia-nitrogen is the 0.6 of stop 3 volume of water tank；The anode material of the electrolysis unit 2
Matter is Ti/lrO2-Ta2O5, and cathode material is industrially pure titanium, maximum voltage 54V, maximum current 260A, dischargeable capacity
(electrolytic cell (parallel connection) total measurement (volume)) is 30L.
In the present embodiment, further include following steps:
S8, the electrode of electrolysis unit 2 is cleaned: electrolysis unit 2 is connected to motor pickling system both ends, can be formed
Pickling circuit；Motor pickling system includes acid cleaning tank 4 and circulating pump 52；It is 5 that mass percent is prepared in the acid cleaning tank 4
~8% hydrochloric acid solution closes 82, No. three valves 83 of No. two valves and No. five valves 85, opens No. six valves 86 and No. seven valves
Door 87, starting circulating pump 52 carry out cycle pickling.
In the present embodiment, it in step S2, in step S1, carries out chlorine root concentration and adjusts, chlorine root concentration is adjusted to
8360mg/L。
In the present embodiment, in step S2, in step S1, temperature adjusting is carried out, temperature is adjusted to 23.5 DEG C.
In the present embodiment, in step S2, in step S2, stop of the Waste Water From Fire Power Plant in the electrolysis unit 2
Time is 1.3min.
In the present embodiment, in step S2, in step S2, the voltage of the electrolysis unit 2 is controlled in 40V, current density
Control is in 250A/m2.
Embodiment 4:
As shown in Figure 1, a kind of based on strong ammonia wastewater cyclic electrolysis treatment process described in embodiment 1,2 or 3
Strong ammonia wastewater cyclic electrolysis processing equipment, including the buffer tank 1, electrolysis unit 2 and stop water tank 3 being sequentially communicated；
Buffer tank 1 described here plays temporary and adjustment effect, can adjust in advance after pretreatment in buffer tank 1
Waste Water From Fire Power Plant (contain ammonia nitrogen, organic matter and dissolving salt) chloride content, soluble solid (TDS) and temperature.
The setting for stopping water tank 3 is the oxidizing substance and object removal object for generating electrolysis for extending the reaction time
The reaction was continued, to reduce cost for wastewater treatment.
The buffer tank 1 is connected to wastewater feed pipe 11；It is provided between the buffer tank 1 and electrolysis unit 2 steady
Delivery pump 51 is flowed, current stabilization delivery pump 51 is electrically connected with frequency converter 511, and the frequency converter 511 is for regulating flow-stabilizing delivery pump 51
Working frequency, with stable flow transport wastewater to the electrolysis unit 2；
The first ammonia nitrogen determination instrument 61, temperature measuring set 63 and No. two are provided on the pipeline of 2 inlet of electrolysis unit
Valve 82；
First ammonia nitrogen determination instrument 61 and temperature measuring set 63 can easily and fast measure the pipe of 2 inlet of electrolysis unit respectively
The ammonia nitrogen concentration and temperature of road.
The electrolysis unit 2 is electrically connected with rectifier cabinet 21, and the rectifier cabinet 21 is logical as direct current for 380V alternating current
Electrode is crossed, and adjusts the voltage between the size of current by electrode, electrode；
Exhaust outlet 31 is provided at the top of the stop water tank 3；
The setting of exhaust outlet 31 is the hydrogen discharge or collection for the ease of generating cell reaction, is also convenient for radiating.
The second ammonia nitrogen determination instrument 64 is provided on the pipeline for stopping 3 exit of water tank；
Second ammonia nitrogen determination instrument 64, can easily and fast measure stop 3 exit of water tank pipeline on ammonia nitrogen concentration.
The pipeline of 2 inlet of electrolysis unit and pipeline after the second ammonia nitrogen determination instrument 64 respectively with circulation
The both ends of pipeline are connected to；Both ends are respectively arranged with No. four valves 84 and No. five valves 85 on the circulation line, and middle part is provided with
First circulation pump 53.
Embodiment 5:
As shown in Figure 1, a kind of based on strong ammonia wastewater cyclic electrolysis treatment process described in embodiment 1,2 or 3
Strong ammonia wastewater cyclic electrolysis processing equipment, including the buffer tank 1, electrolysis unit 2 and stop water tank 3 being sequentially communicated；
Buffer tank 1 described here plays temporary and adjustment effect, can adjust in advance after pretreatment in buffer tank 1
Waste Water From Fire Power Plant (contain ammonia nitrogen, organic matter and dissolving salt) chloride content, soluble solid (TDS) and temperature.
The setting for stopping water tank 3 is the oxidizing substance and object removal object for generating electrolysis for extending the reaction time
The reaction was continued, to reduce cost for wastewater treatment.
The buffer tank 1 is connected to wastewater feed pipe 11；It is provided between the buffer tank 1 and electrolysis unit 2 steady
Delivery pump 51 is flowed, current stabilization delivery pump 51 is electrically connected with frequency converter 511, and the frequency converter 511 is for regulating flow-stabilizing delivery pump 51
Working frequency, with stable flow transport wastewater to the electrolysis unit 2；
The first ammonia nitrogen determination instrument 61, temperature measuring set 63 and No. two are provided on the pipeline of 2 inlet of electrolysis unit
Valve 82；
First ammonia nitrogen determination instrument 61 and temperature measuring set 63 can easily and fast measure the pipe of 2 inlet of electrolysis unit respectively
The ammonia nitrogen concentration and temperature of road.
The electrolysis unit 2 is electrically connected with rectifier cabinet 21, and the rectifier cabinet 21 is logical as direct current for 380V alternating current
Electrode is crossed, and adjusts the voltage between the size of current by electrode, electrode；
Exhaust outlet 31 is provided at the top of the stop water tank 3；
The setting of exhaust outlet 31 is the hydrogen discharge or collection for the ease of generating cell reaction, is also convenient for radiating.
The second ammonia nitrogen determination instrument 64 is provided on the pipeline for stopping 3 exit of water tank；
Second ammonia nitrogen determination instrument 64, can easily and fast measure stop 3 exit of water tank pipeline on ammonia nitrogen concentration.
The pipeline of 2 inlet of electrolysis unit and pipeline after the second ammonia nitrogen determination instrument 64 respectively with circulation
The both ends of pipeline are connected to；Both ends are respectively arranged with No. four valves 84 and No. five valves 85 on the circulation line, and middle part is provided with
First circulation pump 53.
Discontinuity Inlet and outlet water can be used in this way, so that the waste water of high-concentration ammonia-nitrogen (> 500mg/L) is reached row by cyclic electrolysis
Put standard (< 1mg/L).
Further, in another embodiment, the electrolysis unit 2 includes at least two electrolytic cell, and the electrolysis
Slot is cylindrical shape, and mutual connection type is parallel connection.
Such detachable, user can contain ammonia level according to waste water, the electrolysis slot number of processing waste water are freely arranged
Amount.
Further, in another embodiment, the electrolysis unit 2 includes 3 electrolytic cells, and the electrolytic cell is equal
For cylindrical shape, mutual connection type is parallel connection.
Both detachable, user can contain ammonia level according to waste water, the electrolytic cell of processing waste water are freely arranged in this way
Quantity；Cost is saved again, and economic benefit is provided.
Further, in another embodiment, the bottom of the electrolysis unit 2 is provided with the first sewage draining exit 22 and eight
Number valve 88, and the first sewage draining exit 22 is connected to by pipeline with cesspool 7.
The liquid in electrolysis unit 2, easy access easily can be drained when needed in this way.
Further, in another embodiment, agitating device 13 and electric heater are provided on the buffer tank 1
14；The electric heater 14 is electrically connected with controller 141, the controller 141 for control the progress heated at constant temperature or
Firm power heating.
In this way can heated at constant temperature be carried out to the waste water in buffer tank 1 or firm power heats when needed.
Further, in another embodiment, it is provided with feed opening 12 on the buffer tank 1, bottom is provided with
No.1 valve 81.
In this way thermal power plant after pretreatment in buffer tank 1 can be adjusted convenient for adding villaumite etc. by feed opening 12
Chloride content, soluble solid (TDS) and the temperature of waste water (high-concentration ammonia-nitrogen (> 500mg/L)).
Further, in another embodiment, chloride ion tester 15 and dissolution are provided on the buffer tank 1
Property total solid detector 16.
Chloride ion tester 15 can easily and fast measure chlorine root concentration；Total dissolved solid detector 16 can be convenient and quick
Measure TDS in ground；And then Waste Water From Fire Power Plant (high ammonia after pretreatment in buffer tank 1 is adjusted to by addition villaumite etc.
Nitrogen concentration (> 500mg/L)) chloride content, soluble solid (TDS) and temperature, provide according to (additive amount).
Further, in another embodiment, at 2 entrance and exit of electrolysis unit respectively with motor pickling system
Both ends connection, can form pickling circuit；Motor pickling system include both ends No. six valves 86 and No. seven valves 87, middle parts
Acid cleaning tank 4 and second circulation pump 52；The acid cleaning tank 4 is for preparing and storing acid solution, to carry out cycle pickling；It is described
It stops on the pipeline of 3 inlet of water tank and is provided with No. three valves 83.
In this way when fouling occurs for electrode, appropriate hydrochloric acid solution is prepared in acid cleaning tank 4, it is convenient to recycle by 1
It pumps 52 pairs of electrodes and carries out cycle pickling, make to restore electrode activity；When pickling, two at 2 entrance and exit of electrolysis unit are closed
Valve forms pickling circuit；The valve of 4 bottom of acid cleaning tank is also switched off simultaneously.
Preferably, circulating pump 52 is horizontal corrosion resisting centrifugal pump, and acid cleaning tank 4 is horizontal cartridge type case, volume and electrolytic cell
Total measurement (volume) is 1:1.
Further, in another embodiment, the bottom of the acid cleaning tank 4 is provided with the second sewage draining exit 41 and No. nine
Valve 89, and the second sewage draining exit 41 is connected to by pipeline with cesspool 7.
The liquid in acid cleaning tank 4 easily can be drained when needed in this way, convenient for pickling after waste liquid discharge.
Further, in another embodiment, flowmeter is provided on the pipeline in 51 exit of current stabilization delivery pump.
The flow on the pipeline in 51 exit of current stabilization delivery pump can be measured, easily in this way to adjust by frequency converter 511
The working frequency of current stabilization delivery pump 51 provides foundation, preferably (adjusts) transport wastewater as needed to institute with stable flow
State electrolysis unit 2.
The above is only the preferred embodiment of the present invention, it is noted that above-mentioned preferred embodiment is not construed as pair
Limitation of the invention, protection scope of the present invention should be defined by the scope defined by the claims..For the art
For those of ordinary skill, without departing from the spirit and scope of the present invention, several improvements and modifications can also be made, these change
It also should be regarded as protection scope of the present invention into retouching.
Claims (10)
1. a kind of strong ammonia wastewater cyclic electrolysis treatment process, which comprises the steps of:
Waste water feeding buffer tank (1) of S1, high-concentration ammonia-nitrogen, carry out chlorine root concentration and temperature is adjusted；
S2, No.1 valve (81), No. two valves (82), No. three valves (83) are opened, closes No. six valves (86), No. ten valves
(810) and No. seven valves (87), starting current stabilization delivery pump (51) convey high ammonia nitrogen with current stabilization delivery pump (51) with stable flow
The waste water of concentration is electrolysed under current strength and chlorine root co-catalysis to electrolysis unit (2)；
S3, the oxidizing substance and remaining ammonia nitrogen for stopping water tank (3), generating electrolysis are flowed into from electrolysis unit (2) exit
The reaction was continued；
S4, No. four valves (84) and No. five valves (85) to be opened, closes No. two valves (82), starting first circulation pumps (53), into
Row cyclic electrolysis, removal of ammonia and nitrogen；
S6, finally as test value < 1mg/L of the second ammonia nitrogen determination instrument (64), close No. four valves (84) and No. five valves
(85), and stop first circulation pump (53), open No. ten valves (810), outflow cyclic electrolysis treated solution；
S7, step S2 to S6 is repeated, or repeats step S1 to S6；
Wherein, in step S2, with current stabilization delivery pump (51) with the waste water of stable flow conveying high-concentration ammonia-nitrogen to electrolysis unit
(2), the volume for conveying the waste water of high-concentration ammonia-nitrogen is the 1/2~2/3 of described stop water tank (3) volume；The electrolysis unit (2)
Anode material be Ti/lrO2-Ta2O5, cathode material be industrially pure titanium, maximum voltage 54V, maximum current 260A have
Effect volume is 30L.
2. strong ammonia wastewater cyclic electrolysis treatment process according to claim 1, which is characterized in that further include as follows
Step:
S8, the electrode of electrolysis unit (2) is cleaned: electrolysis unit (2) is connected to motor pickling system both ends, can be formed
Pickling circuit；Motor pickling system includes acid cleaning tank (4) and circulating pump (52)；Quality hundred is prepared in the acid cleaning tank (4)
Divide the hydrochloric acid solution than being 5~8 %, closes No. two valves (82), No. three valves (83) and No. five valves (85), open No. six valves
Door (86) and No. seven valves (87), starting circulating pump (52) carry out cycle pickling.
3. strong ammonia wastewater cyclic electrolysis treatment process according to claim 1, which is characterized in that in step S2,
In step S1, carries out chlorine root concentration and adjust, chlorine root concentration is adjusted to 8000~8500 mg/L.
4. strong ammonia wastewater cyclic electrolysis treatment process according to claim 1, which is characterized in that in step S2,
In step S1, temperature adjusting is carried out, temperature is adjusted to 20~25 DEG C.
5. strong ammonia wastewater cyclic electrolysis treatment process according to claim 1, which is characterized in that in step S2,
In step S2, residence time of the Waste Water From Fire Power Plant in the electrolysis unit (2) is 1~1.5 min.
6. strong ammonia wastewater cyclic electrolysis treatment process according to claim 1, which is characterized in that in step S2,
In step S2, in 40 V, current density is controlled in 250 A/m2 for the voltage control of the electrolysis unit (2).
7. a kind of high concentration based on strong ammonia wastewater cyclic electrolysis treatment process as claimed in any one of claims 1 to 6
Ammonia-containing water cyclic electrolysis processing equipment, which is characterized in that including be sequentially communicated buffer tank (1), electrolysis unit (2) and stop
Stay water tank (3)；
The buffer tank (1) is connected to wastewater feed pipe (11)；It is arranged between the buffer tank (1) and electrolysis unit (2)
Have current stabilization delivery pump (51), current stabilization delivery pump (51) is electrically connected with frequency converter (511), and the frequency converter (511) is steady for adjusting
The working frequency of delivery pump (51) is flowed, with stable flow transport wastewater to the electrolysis unit (2)；
The first ammonia nitrogen determination instrument (61), temperature measuring set (63) and two are provided on the pipeline of electrolysis unit (2) inlet
Number valve (82)；
The electrolysis unit (2) is electrically connected with rectifier cabinet (21), and the rectifier cabinet (21) becomes direct current for 380V alternating current
By electrode, and adjust the voltage between the size of current by electrode, electrode；
Exhaust outlet (31) are provided at the top of the stop water tank (3)；
The second ammonia nitrogen determination instrument (64) is provided on the pipeline for stopping water tank (3) exit；
The pipeline of electrolysis unit (2) inlet and be located at the second ammonia nitrogen determination instrument (64) after pipeline respectively with circulation
The both ends of pipeline are connected to；Both ends are respectively arranged with No. four valves (84) and No. five valves (85) on the circulation line, and middle part is set
It is equipped with first circulation pump (53).
8. strong ammonia wastewater cyclic electrolysis processing equipment according to claim 7, it is characterised in that: the electrolysis dress
Setting (2) includes at least two electrolytic cell, and the electrolytic cell is cylindrical shape, and mutual connection type is parallel connection.
9. strong ammonia wastewater cyclic electrolysis processing equipment according to claim 1, it is characterised in that: the buffered water
Agitating device (13) and electric heater (14) are provided on case (1)；The electric heater (14) is electrically connected with controller (141),
The controller (141) is for controlling the progress heated at constant temperature or firm power heating；It is arranged on the buffer tank (1)
Have feed opening (12), bottom is provided with No.1 valve (81)；Chloride ion tester (15) are provided on the buffer tank (1)
With total dissolved solid detector (16).
10. strong ammonia wastewater cyclic electrolysis processing equipment according to claim 1, it is characterised in that: the electrolysis
It is connected to respectively with motor pickling system both ends at device (2) entrance and exit, pickling circuit can be formed；Motor pickling system packet
Include No. six valves (86) and No. seven valves (87), the acid cleaning tank (4) at middle part and the second circulation pump (52) at both ends；The acid cleaning tank
(4) for preparing and storing acid solution, to carry out cycle pickling；It is provided on the pipeline for stopping water tank (3) inlet
No. three valves (83).
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