CN102872705B - Device and method for carrying out electro-Fenton oxidization on HCN (hydrogen cyanide) by using liquid-phase method - Google Patents
Device and method for carrying out electro-Fenton oxidization on HCN (hydrogen cyanide) by using liquid-phase method Download PDFInfo
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- CN102872705B CN102872705B CN201210394692.3A CN201210394692A CN102872705B CN 102872705 B CN102872705 B CN 102872705B CN 201210394692 A CN201210394692 A CN 201210394692A CN 102872705 B CN102872705 B CN 102872705B
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Abstract
The invention discloses a device and method for carrying out electro-Fenton oxidization on HCN (hydrogen cyanide) by using a liquid-phase method. The device comprises an electric waste gas treatment device, an HCN recovery storage tank, a gas mist eliminator, a spray liquid storage tank, an on-line monitor, an anolyte collection pool, a catholyte tank, a Fe2+ containing liquid tank, a cathodic electro-Fenton device, a (NH4) 2CO3 recovery storage tank, other waste gas treatment devices, a neutralization tank and the like. High-concentration cyanogen-containing waste gas passes through the electric waste gas treatment device firstly so as to recover most of HCN, then the residual low-concentration HCN gas is fed into the cathodic electro-Fenton device, the cathodic electro-Fenton device is a fluidized bed type device and is internally filled with a conductive medium, voltages are exerted on the two ends of the device, Fe2+-containing liquid is fed in the device, and air is fed in a cathode, so that free radicals are generated under the action of electricity, and then low-concentration HCN is oxidized into NH3 and CO2, thereby realizing the zero release of HCN and the recovery of (NH4)2CO3. The device can treat low-concentration HCN in cyanogen-containing waste gases such as calcium carbide furnace gas, coke-oven gas and the like.
Description
Technical field
The present invention relates to the devices and methods therefor of a kind of liquid phase method electricity Fenton oxidation HCN.
Background technology
The removal methods of HCN is mainly absorption process, absorption method and combustion method.The method of several HCN of removing waste gas respectively has feature, and the pluses and minuses of every kind of processing method and the object that is suitable for processing thereof are had nothing in common with each other.In processing actual production, produce HCN tail gas time, the factors such as cost of HCN concentration, contained other components of tail gas and discharging modes, existing equipment and processing method all can have influence on the selection of HCN removal methods.When adopting absorption method, some gas group branch affects the suction-operated of active carbon to HCN.For example, while containing more steam in waste gas, there is competitive Adsorption phenomenon in steam and HCN, makes the HCN desorb being adsorbed and greatly reduce treatment effect.When steam volume content surpasses 50 %, active carbon just no longer adsorbs HCN.While therefore containing the component of impact absorption in waste gas, tackle it and carry out necessary pretreatment.Consider that in production practices, HCN tail gas is mainly derived from the Pintsch process of coal and the processing of the high temperature carbonization of PAN charcoal fiber, adopt Production by Catalytic Combustion Process to there is larger advantage, but the catalytic combustion research to HCN, has not yet to see ripe industrialization report, also mainly in the laboratory research stage.Patent CN 201586472 U disclose a kind of containing cyanogen emission-control equipment, after mixing with soda bath at twice containing cyanogen waste gas, be fully absorbed, compare with operation of the prior art, absorptivity increases greatly, and reduced caustic soda consumption amount, improved safety in production level, but be faced with equally, consumed a large amount of chemical agents, and generation secondary pollution, can not recycle ion.And remaining low concentration HCN solution can not get processing.For this, in the present invention, adopt liquid phase method electricity Fenton oxidation HCN system (NH
4)
2cO
3purify containing cyanogen waste gas, under electric effect, produce free radical, will be converted into NH to HCN
3and CO
2recycle, realize HCN zero-emission and recovery (NH
4)
2cO
3.
Summary of the invention
The object of the invention is to overcome the deficiency of existing technology, the devices and methods therefor of a kind of liquid phase method electricity Fenton oxidation HCN is provided.
The device of liquid phase method electricity Fenton oxidation HCN comprises that exhaust gas centralized gas hood, pressure controller, electronic emission-control equipment, HCN reclaim storage tank, gas demister, spray liquid storage tank, by-pass valve control, on-line monitoring device, anolyte collecting pit, negative electrode flow container, contain Fe
2+naOH solution tank NaOH, cathodic electricity Fenton device, gas cylinder, air blast, (NH
4)
2cO
3reclaim storage tank, other emission-control equipments, neutralization pond; Electronic emission-control equipment comprises spray head, amberplex, cathode chamber, anode chamber, inertia filler, the first minus plate, first anode plate, the first dc source, electronic emission-control equipment body is separated into cathode chamber, anode chamber with ion selectivity exchange membrane, in cathode chamber and anode chamber, be filled with inertia filler, in anode chamber, be provided with first anode plate, first anode plate is connected with the first DC power anode, in cathode chamber, be provided with the first minus plate, the first minus plate is connected with the first DC power cathode; In cathodic electricity Fenton device, be filled with conducting medium, cathodic electricity Fenton device is provided with second plate plate and the second minus plate, and second plate plate is connected with the positive pole of the second dc source, and the second minus plate is connected with the negative pole of the second dc source; Exhaust gas centralized gas hood is connected with electronic emission-control equipment cathode chamber through pressure controller; Top, emission-control equipment anode chamber is connected with the HCN solution entrance of cathodic electricity Fenton device through pressure controller, HCN recovery storage tank, by-pass valve control; Electronic emission-control equipment cathode chamber top is connected with other gas treatment equipments through pressure controller; Bottom, electronic emission-control equipment anode chamber is connected with the anolyte entrance of cathodic electricity Fenton device through on-line monitoring device, anode flow container, by-pass valve control, and electronic emission-control equipment cathode chamber bottom is connected with the catholyte entrance of cathodic electricity Fenton device through on-line monitoring device, negative electrode flow container, by-pass valve control; Negative electrode flow container is connected with spray liquid storage tank through by-pass valve control, neutralization pond, by-pass valve control; Spray liquid storage tank is divided into two-way after by-pass valve control, on-line monitoring device, and a road is connected with electrokinetic process exhaust device cathode chamber through by-pass valve control, spray head, and another road is connected with electrokinetic process exhaust device anode chamber through by-pass valve control, spray head; Containing Fe
2+naOH solution tank NaOH is through the Fe of by-pass valve control and cathodic electricity Fenton device
2+solution entrance is connected; Gas cylinder is connected with cathodic electricity Fenton bottom of device entrance through air blast, (NH
4)
2cO
3reclaiming storage tank is connected with the outlet of cathodic electricity Fenton bottom of device through by-pass valve control.
Described inertia filler is one or more in convex-concave trenches openings porcelain ball, active porcelain ball, Pored ceramic ball, micropore porcelain ball, accumulation of heat porcelain ball, grinding porcelain ball, three shape porous porcelains, resin extender.
Described first anode plate and the material of second plate plate are graphite, active carbon fiber felt, active carbon fiber fabrics and conducting metal or metal oxide, on conducting metal or metal oxide, are coated with PbO
2, RuO
2, IrO
2, TiO
2, MnO
2in at least one; The material of the first minus plate is stainless steel electrode, graphite, active carbon fiber felt, active carbon fiber fabrics and conducting metal or metal oxide, on conducting metal or metal oxide, is coated with PbO
2, RuO
2, IrO
2, TiO
2, MnO
2in at least one; The material of the second minus plate 15 is Activated Carbon Fiber Electrodes, graphite electrode, graphite gas-diffusion electrode, active carbon gas-diffusion electrode, multiple-wall carbon nanotube electrode; Netted, the poroid or wire grid shape of being shaped as of battery lead plate.
Described containing Fe
2+solution in NaOH solution tank NaOH can be ferrous sulfate, frerrous chloride, ferrous nitrate.
In described HCN absorption plant, be provided with clear water; Described ion selectivity exchange membrane is homogeneous-phase anion exchange film or out-phase anion-exchange membrane.
The method of the liquid phase electricity Fenton oxidation HCN of described device is that electronic emission-control equipment produces direct current more than 20V, impels a large amount of H of generation in anode chamber
+, forming acid atmosphere, cathode chamber produces a large amount of OH
-, form alkaline atmosphere; In exhaust gas centralized gas hood containing after cyanogen waste gas absorbs by spray liquid in electronic emission-control equipment 3, cyanogen PH in cathode chamber is greater than and under 13 strong alkaline conditions, more than 99% is converted into CN
-then under electro ultrafiltration, move, through anion-exchange membrane, enter anode chamber, and at PH, be less than under 2 highly acid atmosphere and generate pure HCN gas, the HCN gas generating enters HCN and reclaims storage tank by clear water absorption generation hydrogen cyanide solution, hydrogen cyanide solution enters cathodic electricity Fenton oxidation device, adopts cathodic electricity Fenton device to be oxidized to NH
3and CO
2, realize (NH
4)
2cO
3reclaim, process is: O
2+ 2H
++ 2e → H
2o
2; Fe
2++ H
2o
2→ OH+OH
-+ Fe
3+; HCN+OH → NH
3+ CO
2; Fe
3++ e
-→ Fe
2+, the NH that oxidation generates
3and CO
2be converted into (NH
4)
2cO
3product, finally enters (NH
4)
2cO
3reclaiming storage tank recycles; Spray liquid in described spray liquid storage tank is for containing NaCl, Na
2sO
4, Na
3pO
4, Na
2hPO
4, NaNO
3in at least one brackish water, salt content is 0.01%-10%, can carry out intermittence and spray-absorption HCN continuously; The anolyte and the catholyte that through electronic emission-control equipment, produce are drawn, enter respectively anode flow container, negative electrode flow container, anode flow container passes into cathodic electricity Fenton oxidation device by by-pass valve control control and carries out electric Fenton oxidation reaction, liquid storage in negative electrode flow container, a part enters neutralization pond neutralization, neutralizer is for supplementing the spray liquid in spray pond, and another part passes into cathodic electricity Fenton oxidation device by by-pass valve control control and carries out electric Fenton oxidation reaction; Fe
2+solution in NaOH solution tank NaOH passes into electric Fenton oxidation device under the control of by-pass valve control; Described spray head is the spiral spray assembly of wing, and spray liquid tangentially disperses to form tiny cloud point, and HCN is dissolved in and in these cloud points, forms efficient absorption efficiency.
Described conducting metal or metal oxide coated have PbO
2, RuO
2, IrO
2, TiO
2, MnO
2in at least one the preparation method of conducting metal be, by PbO
2, RuO
2, IrO
2, TiO
2, MnO
2in at least one is coated on conducting metal, sintering 6 h at 200-300 ℃ of left and right temperature.
Compared with prior art, the present invention has the following advantages:
Low concentration CN
-adopt electric Fenton device by CN
-be converted into NH
3and CO
2, realize HCN zero-emission and recovery (NH
4)
2cO
3.
Accompanying drawing explanation
Fig. 1 is the apparatus structure schematic diagram that electric Fenton purifies remaining HCN;
Fig. 2 is that Fenton purifies remaining HCN Method And Principle figure;
In figure: exhaust gas centralized gas hood 1, pressure controller 2, electronic emission-control equipment 3, HCN reclaim storage tank 4, gas demister 5, spray liquid storage tank 6, by-pass valve control 7, on-line monitoring device 8, anolyte collecting pit 10, negative electrode flow container 11, contain Fe
2+naOH solution tank NaOH 12, cathodic electricity Fenton device 13, gas cylinder 18, air blast 19, (NH
4)
2cO
3reclaim storage tank 20, other emission-control equipments 21, neutralization pond 22, ion selectivity exchange membrane 23, cathode chamber 24, anode chamber 25, inertia filler 26, in anode chamber, be provided with first anode plate 28, the first dc source 29.
The specific embodiment
As shown in Figure 1, the device of liquid phase method electricity Fenton oxidation HCN comprises that exhaust gas centralized gas hood 1, pressure controller 2, electronic emission-control equipment 3, HCN reclaim storage tank 4, gas demister 5, spray liquid storage tank 6, by-pass valve control 7, on-line monitoring device 8, anolyte collecting pit 10, negative electrode flow container 11, contain Fe
2+naOH solution tank NaOH 12, cathodic electricity Fenton device 13, gas cylinder 18, air blast 19, (NH
4)
2cO
3reclaim storage tank 20, other emission-control equipments 21, neutralization pond 22, electronic emission-control equipment 3 comprises spray head 9, amberplex 23, cathode chamber 24, anode chamber 25, inertia filler 26, the first minus plate 27, first anode plate 28, the first dc source 29, electronic emission-control equipment 3 bodies are separated into cathode chamber 24 with ion selectivity exchange membrane 23, anode chamber 25, in cathode chamber 24He anode chamber 25, be filled with inertia filler 26, in anode chamber, be provided with first anode plate 28, first anode plate 28 is connected with the first dc source 29 positive poles, in cathode chamber, be provided with the first minus plate 27, the first minus plate 27 is connected with the first dc source 29 negative poles, in cathodic electricity Fenton device 13, be filled with conducting medium 17, cathodic electricity Fenton device 13 is provided with second plate plate 14 and the second minus plate 15, second plate plate 14 is connected with the positive pole of the second dc source 16, and the second minus plate 15 is connected with the negative pole of the second dc source 16, exhaust gas centralized gas hood 1 is connected with electronic emission-control equipment 3 cathode chambers through pressure controller 2, emission-control equipment 3 tops, anode chamber are connected with the HCN solution entrance of cathodic electricity Fenton device 13 through pressure controller 2, HCN recovery storage tank 4, by-pass valve control 7, electronic emission-control equipment 3 cathode chamber tops are connected with other gas treatment equipments 21 through pressure controller 2, electronic emission-control equipment 3 bottoms, anode chamber are connected with the anolyte entrance of cathodic electricity Fenton device 13 through on-line monitoring device 8, anode flow container 10, by-pass valve control 7, and electronic emission-control equipment 3 cathode chamber bottoms are connected with the catholyte entrance of cathodic electricity Fenton device 13 through on-line monitoring device 8, negative electrode flow container 11, by-pass valve control 7, negative electrode flow container 11 is connected with spray liquid storage tank 6 through by-pass valve control 7, neutralization pond 22, by-pass valve control 7, spray liquid storage tank 6 is divided into two-way after by-pass valve control 7, on-line monitoring device 8, and a road is through by-pass valve control 7, spray head 9 and electrokinetic process exhaust device 3 cathode chambers 24, and another Lu Yilu is through by-pass valve control 7, spray head 9 and electrokinetic process exhaust device 3 anode chambers 25, containing Fe
2+naOH solution tank NaOH 12 is the Fe with cathodic electricity Fenton device 13 through by-pass valve control 7
2+solution entrance is connected, gas cylinder 18 is connected with cathodic electricity Fenton device 13 bottom inlets through air blast 19, (NH
4)
2cO
3reclaiming storage tank 20 is connected with cathodic electricity Fenton device 13 outlet at bottoms through by-pass valve control 7.Entrance 1 is HCN solution entrance, and entrance 2 is anolyte entrance, and entrance 3 is catholyte entrance, and entrance 4 is Fe
2+solution entrance.
Inertia filler 26 is one or more in convex-concave trenches openings porcelain ball, active porcelain ball, Pored ceramic ball, micropore porcelain ball, accumulation of heat porcelain ball, grinding porcelain ball, three shape porous porcelains, resin extender.
The material of first anode plate 28 and second plate plate 14 is graphite, active carbon fiber felt, active carbon fiber fabrics and conducting metal or metal oxide, on conducting metal or metal oxide, is coated with PbO
2, RuO
2, IrO
2, TiO
2, MnO
2in at least one; The material of the first minus plate 27 is stainless steel electrode, graphite, active carbon fiber felt, active carbon fiber fabrics and conducting metal or metal oxide, on conducting metal or metal oxide, is coated with PbO
2, RuO
2, IrO
2, TiO
2, MnO
2in at least one; The material of the second minus plate 15 is Activated Carbon Fiber Electrodes, graphite electrode, graphite gas-diffusion electrode, active carbon gas-diffusion electrode, multiple-wall carbon nanotube electrode; Netted, the poroid or wire grid shape of being shaped as of battery lead plate.
Containing Fe
2+solution in NaOH solution tank NaOH 12 can be ferrous sulfate, frerrous chloride, ferrous nitrate.
In HCN absorption plant 4, be provided with clear water; Ion selectivity exchange membrane 23 is homogeneous-phase anion exchange film or out-phase anion-exchange membrane.
The method of liquid phase electricity Fenton oxidation HCN is: electronic emission-control equipment 3 produces direct current more than 20V, impels a large amount of H of the interior generation in anode chamber 25
+, forming acid atmosphere, cathode chamber 24 produces a large amount of OH
-, form alkaline atmosphere; In exhaust gas centralized gas hood 1 containing after cyanogen waste gas absorbs by spray liquid in electronic emission-control equipment 3, cyanogen is greater than and under 13 strong alkaline conditions, more than 99% is converted into CN at the interior PH of cathode chamber 25
-then under electro ultrafiltration, move, through anion-exchange membrane 26, enter anode chamber 24, and at PH, be less than under 2 highly acid atmosphere and generate pure HCN gas, the HCN gas generating enters HCN and reclaims storage tank 4 by clear water absorption generation hydrogen cyanide solution, hydrogen cyanide solution enters cathodic electricity Fenton oxidation device 13, adopts cathodic electricity Fenton device to be oxidized to NH
3and CO
2, realize (NH
4)
2cO
3reclaim, process is: O
2+ 2H
++ 2e → H
2o
2; Fe
2++ H
2o
2→ OH+OH
-+ Fe
3+; HCN+OH → NH
3+ CO
2; Fe
3++ e
-→ Fe
2+, the NH that oxidation generates
3and CO
2be converted into (NH
4)
2cO
3product, finally enters (NH
4)
2cO
3reclaiming storage tank 20 recycles; Spray liquid in described spray liquid storage tank 6 is for containing NaCl, Na
2sO
4, Na
3pO
4, Na
2hPO
4, NaNO
3in at least one brackish water, salt content is 0.01%-10%, can carry out intermittence and spray-absorption HCN continuously; The anolyte and the catholyte that through electronic emission-control equipment 3, produce are drawn, enter respectively anode flow container 10, negative electrode flow container 11, anode flow container 10 passes into cathodic electricity Fenton oxidation device 13 by by-pass valve control 7 controls and carries out electric Fenton oxidation reaction, liquid storage in negative electrode flow container 11, a part enters neutralization pond 22 neutralizations, neutralizer is for supplementing the spray liquid in spray pond 6, and another part passes into cathodic electricity Fenton oxidation device 13 by by-pass valve control 7 controls and carries out electric Fenton oxidation reaction; Fe
2+solution in NaOH solution tank NaOH 12 passes into electric Fenton oxidation device under the control of by-pass valve control 7; The spiral spray assembly that described spray head 9 is wing, spray liquid tangentially disperses to form tiny cloud point, and HCN is dissolved in and in these cloud points, forms efficient absorption efficiency.
By PbO
2, RuO
2, IrO
2, TiO
2, MnO
2in at least one is coated on conducting metal, at 200-300 ℃ of left and right temperature, sintering 6 h prepare conducting metal or metal oxide.
embodiment 1
Adopt the device Treatment of Carbon of a kind of liquid phase method electricity Fenton oxidation HCN as shown in Figure 1 containing the HCN in cyanogen waste gas.In waste gas, HCN concentration is 90mg/m
3, through electric power, migration is reclaimed and is purified containing after the device of cyanogen waste gas CN
-in electric Fenton oxidation device, be oxidized to (NH
4)
2cO
3reclaim through recrystallization and can obtain the product into 96.6%-98.7%.
embodiment 2
In embodiment 2, adopt to adopt two groups of electronic emission-control equipments series connection to reclaim the HCN in calcium carbide furnace gas, operating procedure, principle are identical with embodiment 1.In waste gas, HCN concentration is 2.45g/m
3, through electric power, migration is reclaimed and is purified containing after cyanogen exhaust device CN
-in electric Fenton oxidation device, be oxidized to (NH
4)
2cO
3reclaim through recrystallization and can obtain the product into 97%-98.5%.
Claims (6)
1. a device of liquid phase method electricity Fenton oxidation HCN, is characterized in that comprising that exhaust gas centralized gas hood (1), pressure controller (2), electronic emission-control equipment (3), HCN reclaim storage tank (4), gas demister (5), spray liquid storage tank (6), by-pass valve control (7), on-line monitoring device (8), anolyte collecting pit (10), negative electrode flow container (11), contain Fe
2+naOH solution tank NaOH (12), cathodic electricity Fenton device (13), gas cylinder (18), air blast (19), (NH
4)
2cO
3reclaim storage tank (20), other emission-control equipments (21), neutralization pond (22), electronic emission-control equipment (3) comprises spray head (9), ion selectivity exchange membrane (23), cathode chamber (24), anode chamber (25), inertia filler (26), the first minus plate (27), first anode plate (28), the first dc source (29), electronic emission-control equipment (3) for body ion selectivity exchange membrane (23) be separated into cathode chamber (24), anode chamber (25), in cathode chamber (24) and anode chamber (25), be filled with inertia filler (26), in anode chamber, be provided with first anode plate (28), first anode plate (28) is connected with the first dc source (29) is anodal, in cathode chamber, be provided with the first minus plate (27), the first minus plate (27) is connected with the first dc source (29) negative pole, in cathodic electricity Fenton device (13), be filled with conducting medium (17), cathodic electricity Fenton device (13) is provided with second plate plate (14) and the second minus plate (15), second plate plate (14) is connected with the positive pole of the second dc source (16), and the second minus plate (15) is connected with the negative pole of the second dc source (16), exhaust gas centralized gas hood (1) is connected with electronic emission-control equipment (3) cathode chamber through pressure controller (2), spray liquid storage tank (6) is divided into two-way through by-pass valve control (7), on-line monitoring device after (8), one tunnel is connected with electrokinetic process exhaust device (3) cathode chamber (24) through by-pass valve control (7), spray head (9), and another road is connected with electrokinetic process exhaust device (3) anode chamber (25) through by-pass valve control (7), spray head (9), emission-control equipment (3) top, anode chamber is connected with cathodic electricity Fenton device (13) HCN solution entrance through pressure controller (2), HCN recovery storage tank (4), by-pass valve control (7), electronic emission-control equipment (3) cathode chamber top is connected with other gas treatment equipments (21) through pressure controller (2), bottom, electronic emission-control equipment (3) anode chamber is connected with cathodic electricity Fenton device (13) anolyte entrance through on-line monitoring device (8), anode flow container (10), by-pass valve control (7), and electronic emission-control equipment (3) cathode chamber bottom is connected with cathodic electricity Fenton device (13) catholyte entrance through on-line monitoring device (8), negative electrode flow container (11), by-pass valve control (7), negative electrode flow container (11) is connected with spray liquid storage tank (6) through by-pass valve control (7), neutralization pond (22), by-pass valve control (7), containing Fe
2+naOH solution tank NaOH (12) is through by-pass valve control (7) and cathodic electricity Fenton device (13) Fe
2+solution entrance is connected, gas cylinder (18) is connected with cathodic electricity Fenton device (13) bottom inlet through air blast (19), (NH
4)
2cO
3reclaiming storage tank (20) is connected with cathodic electricity Fenton device (13) outlet at bottom through by-pass valve control (7).
2. the device of a kind of liquid phase method electricity Fenton oxidation HCN according to claim 1, is characterized in that described inertia filler (26) is one or more in active porcelain ball, Pored ceramic ball, micropore porcelain ball, accumulation of heat porcelain ball, grinding porcelain ball, three shape porous porcelains, resin extender.
3. the device of a kind of liquid phase method electricity Fenton oxidation HCN according to claim 1, it is characterized in that described first anode plate (28) and the material of second plate plate (14) are graphite, active carbon fiber felt, active carbon fiber fabrics, conducting metal or metal oxide, on conducting metal or metal oxide, be coated with PbO
2, RuO
2, IrO
2, TiO
2, MnO
2in at least one; The material of the first minus plate (27) is graphite, active carbon fiber felt, active carbon fiber fabrics, conducting metal or metal oxide, on conducting metal or metal oxide, is coated with PbO
2, RuO
2, IrO
2, TiO
2, MnO
2in at least one; The material of the second minus plate (15) is Activated Carbon Fiber Electrodes, graphite electrode, active carbon gas-diffusion electrode, multiple-wall carbon nanotube electrode; Netted, the poroid or wire grid shape of being shaped as of battery lead plate.
4. the device of a kind of liquid phase method electricity Fenton oxidation HCN according to claim 1, is characterized in that the described Fe that contains
2+naOH solution tank NaOH is provided with solution in (12), and solution is ferrous sulfate, frerrous chloride or ferrous nitrate.
5. the device of a kind of liquid phase method electricity Fenton oxidation HCN according to claim 1, is characterized in that being provided with clear water in described HCN recovery storage tank (4); Ion selectivity exchange membrane (23) is homogeneous-phase anion exchange film or out-phase anion-exchange membrane.
6. a method of the liquid phase electricity Fenton oxidation HCN that use is installed as claimed in claim 1, is characterized in that electronic emission-control equipment (3) produces direct current more than 20V, impels a large amount of H of generation in anode chamber (25)
+, forming acid atmosphere, cathode chamber (24) produces a large amount of OH
-, form alkaline atmosphere; In exhaust gas centralized gas hood (1) containing after cyanogen waste gas absorbs by spray liquid in electronic emission-control equipment (3), cyanogen pH in cathode chamber (24) is greater than and under 13 strong alkaline conditions, more than 99% is converted into CN
-then under electro ultrafiltration, move, through ion selectivity exchange membrane (23), enter anode chamber (25), and at pH, be less than under 2 highly acid atmosphere and generate pure HCN gas, the HCN gas generating enters HCN and reclaims storage tank (4) by clear water absorption generation hydrogen cyanide solution, hydrogen cyanide solution enters cathodic electricity Fenton oxidation device (13), adopts cathodic electricity Fenton device to be oxidized to NH
3and CO
2, realize (NH
4)
2cO
3reclaim, process is: O
2+ 2H
++ 2e → H
2o
2; Fe
2++ H
2o
2→ OH+OH
-+ Fe
3+; HCN+OH → NH
3+ CO
2; Fe
3++ e
-→ Fe
2+, the NH that oxidation generates
3and CO
2be converted into (NH
4)
2cO
3product, finally enters (NH
4)
2cO
3reclaiming storage tank (20) recycles; Spray liquid in described spray liquid storage tank (6) is for containing NaCl, Na
2sO
4, Na
3pO
4, Na
2hPO
4, NaNO
3in at least one brackish water, salt content is 0.01%-10%, can carry out intermittence and spray-absorption HCN continuously; The anolyte and the catholyte that through electronic emission-control equipment (3), produce are drawn, enter respectively anode flow container (10), negative electrode flow container (11), anode flow container (10) passes into cathodic electricity Fenton oxidation device (13) by by-pass valve control (7) control and carries out electric Fenton oxidation reaction, liquid storage in negative electrode flow container (11), a part enters neutralization pond (22) neutralization, neutralizer is for supplementing the spray liquid in spray liquid storage tank (6), and another part passes into cathodic electricity Fenton oxidation device (13) by by-pass valve control (7) control and carries out electric Fenton oxidation reaction; Fe
2+solution in NaOH solution tank NaOH (12) passes into electric Fenton oxidation device under the control of by-pass valve control (7); The spiral spray assembly that described spray head (9) is wing, spray liquid tangentially disperses to form tiny cloud point, and HCN is dissolved in and in these cloud points, forms efficient absorption efficiency.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210394692.3A CN102872705B (en) | 2012-10-17 | 2012-10-17 | Device and method for carrying out electro-Fenton oxidization on HCN (hydrogen cyanide) by using liquid-phase method |
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|---|---|---|---|
| CN201210394692.3A CN102872705B (en) | 2012-10-17 | 2012-10-17 | Device and method for carrying out electro-Fenton oxidization on HCN (hydrogen cyanide) by using liquid-phase method |
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| CN116081781B (en) * | 2023-04-06 | 2023-07-28 | 天津市环境保护技术开发中心设计所有限责任公司 | High-voltage cathode electro-Fenton catalytic oxidation sewage treatment device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1035958A (en) * | 1988-03-22 | 1989-10-04 | 浙江大学 | Contain the deep-purifying method of hydrogen cyanide tail gas and the preparation method of decyanation agent |
| US5968465A (en) * | 1996-04-23 | 1999-10-19 | Exxon Research And Engineering Co. | Process for removal of HCN from synthesis gas |
| CN101982221A (en) * | 2010-10-27 | 2011-03-02 | 西安交通大学 | Method for desorbing hydrogen cyanide in gaseous phase products obtained by performing chemical machining on coals |
Family Cites Families (1)
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| DE4319234A1 (en) * | 1993-06-09 | 1994-12-15 | Linde Ag | Process for the removal of HCN from gas mixtures and catalyst for the decomposition of HCN |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1035958A (en) * | 1988-03-22 | 1989-10-04 | 浙江大学 | Contain the deep-purifying method of hydrogen cyanide tail gas and the preparation method of decyanation agent |
| US5968465A (en) * | 1996-04-23 | 1999-10-19 | Exxon Research And Engineering Co. | Process for removal of HCN from synthesis gas |
| CN101982221A (en) * | 2010-10-27 | 2011-03-02 | 西安交通大学 | Method for desorbing hydrogen cyanide in gaseous phase products obtained by performing chemical machining on coals |
Non-Patent Citations (2)
| Title |
|---|
| JP特表平9-500319A 1997.01.14 |
| Terzic M.Oliver et al.Synthetic activated carbons for the removal of hydrogen cyanide from air.《Chemical Engineering and Processing》.2005,第44卷(第11期),第1181-1187页. * |
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