CN102872690B - Device and method for recovering cyanogen through electric migration and recovering NH3 through oxidation - Google Patents
Device and method for recovering cyanogen through electric migration and recovering NH3 through oxidation Download PDFInfo
- Publication number
- CN102872690B CN102872690B CN201210394673.0A CN201210394673A CN102872690B CN 102872690 B CN102872690 B CN 102872690B CN 201210394673 A CN201210394673 A CN 201210394673A CN 102872690 B CN102872690 B CN 102872690B
- Authority
- CN
- China
- Prior art keywords
- hcn
- anode
- gas
- plate
- catalyst
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Water Treatment By Electricity Or Magnetism (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
- Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
Abstract
The invention discloses a device and method for recovering cyanogen through electric migration and recovering NH3 through oxidation. The device disclosed by the invention is composed of an electric waste gas treatment device, a cathode electric Fenton device and a carbon fluidized bed, wherein the electric waste gas treatment device is composed of an anode chamber and a cathode chamber which are separated by an ion-selective permeable membrane; and when voltages are applied to both ends of the device, waste gas enters the cathode chamber, is converted into the form of CN- and enters the anode chamber through an ion exchange membrane under the effect of electric migration, so that high-concentration HCN gas is obtained in the anode chamber and is absorbed by clear water in an HCN recovery storage tank to generate hydrocyanic acid, the hydrocyanic acid is oxidated into NH3 under the effect of a catalyst in the carbon fluidized bed, and NH3 is absorbed by acid in an absorption tank for reutilization. According to the device disclosed by the invention, HCN can be recovered from various kinds of cyanogen-containg waste gas (such as carbon fiber tail gas, allyl cyanide waste gas, calcium carbide furnace gas, coke oven gas, yellow phosphorus tail gas and the like) and can be synthesized into NH3 products.
Description
Technical field
The present invention relates to a kind of electric power migration and reclaim cyanogen/oxid-reclamatiom NH
3devices and methods therefor.
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 this method is faced with a large amount of chemical agent of consumption equally, and generation secondary pollution, can not recycle.For this, in the present invention, adopt electric driving method to carry out abdominal muscle purification to hydrogen cyanide waste gas, the hydrogen cyanide in waste gas is converted into hydrogen cyanide, and reclaims and be converted into NH under catalytic action
3, series connection absorption tower is to NH
3gAS ABSORPTION, transfers (NH to
4)
2sO
4, NH
4nO
3, NH
4cl and (NH
4)
3pO
4deng chemicals, make it containing cyanogen waste gas, to transfer high value-added product by poisonous and hazardous to.
Summary of the invention
The object of the invention is to overcome the deficiency of existing technology, provide a kind of electric power migration to reclaim cyanogen/oxid-reclamatiom NH
3devices and methods therefor.
Cyanogen/oxid-reclamatiom NH is reclaimed in electric power migration
3device comprise that exhaust gas centralized gas hood, pressure controller, electronic emission-control equipment, HCN reclaim storage tank, other gas processing devices, by-pass valve control, on-line monitoring device, charcoal fluid bed, fluid bed filler, air steel cylinder, air blast, tourie, spray liquid pool, sprinkling equipment, anode flow container, negative electrode flow container, neutralization pond, cathodic electricity Fenton device, the first dc source, electronic emission-control equipment comprises ion selectivity exchange membrane, anode chamber, cathode chamber, inertia filler, first anode plate, the first minus plate, electronic emission-control equipment body is separated into anode chamber with ion selectivity exchange membrane, cathode chamber, in anode chamber and cathode 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, exhaust gas centralized gas hood is connected with the cathode chamber of electronic emission-control equipment through pressure controller, top, anode chamber is reclaimed storage tank through pressure controller with HCN and is connected, HCN reclaims tank top through by-pass valve control, on-line monitoring device is connected with charcoal fluid bed bottom, air steel cylinder is connected with charcoal fluid bed through air blast, fluid bed outlet is connected with tourie through by-pass valve control, spray liquid pool is through by-pass valve control, on-line monitoring device and sprinkling equipment divide two-way, wherein, top, Yi Luyu anode chamber is connected, another road is connected with cathode chamber top, the outlet of cathode chamber top is connected with other gas treatment equipments, bottom, anode chamber is through on-line monitoring device, by-pass valve control is connected with anolyte tank top, anolyte pot bottom is connected with neutralization pond top through by-pass valve control, cathode chamber bottom is connected with catholyte tank top through on-line monitoring device, the water outlet of negative electrode flow container divides two-way, one tunnel is connected with neutralization pond top through by-pass valve control, another road is connected with cathodic electricity Fenton device top through by-pass valve control, neutralization pond is connected with spray liquid pool, in charcoal fluid bed, there is filler, cathodic electricity Fenton device comprises second plate plate, the second minus plate, the second dc source, second plate plate is connected with the positive pole of the second dc source, the second minus plate is connected with the second DC power cathode.
In described charcoal fluid bed, be provided with filler, filler is one or more in straw charcoal or coconut husk charcoal, filler Surface mulch one deck catalyst, one or more in metallic catalyst, metal oxide catalyst, complex compound catalyst, rare earth catalyst, molecular sieve catalyst of catalyst, metal in described metallic catalyst is Cu, Ni, Pt, Fe, and the oxide in metal oxide catalyst is ZrO
2, TiO
2, WO
3, Al
2o
3, Fe
2o
3, complex compound catalyst is polyvinyl siloxane-platinum complex, titanium chelate, molecular sieve catalyst is natural zeolite, aluminum phosphate.
In described HCN absorption plant, be provided with clear water; In tourie, be provided with sulfuric acid, nitric acid, hydrochloric acid or phosphoric acid; Ion selectivity exchange membrane is homogeneous-phase anion exchange film or out-phase anion-exchange membrane.
Described first anode plate and the material of second plate plate are graphite, active carbon fiber felt, active carbon fiber fabrics and are coated with PbO
2, RuO
2, IrO
2, TiO
2, MnO
2in at least one conducting metal or metal oxide, the material of the first minus plate (24) is stainless steel electrode, graphite, active carbon fiber felt, active carbon fiber fabrics and is coated with PbO
2, RuO
2, IrO
2, TiO
2, MnO
2in at least one conducting metal or metal oxide, the material of the second minus plate 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 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.
Cyanogen/oxid-reclamatiom NH is reclaimed in electric power migration
3method be: electronic emission-control equipment produces direct current more than 20V, impels in anode chamber and to produce a large amount of H
+, form acid atmosphere, pH≤1.0, cathode chamber produces a large amount of OH
-, form alkaline atmosphere, pH>=14.0; In exhaust gas centralized gas hood containing after cyanogen waste gas absorbs by spray liquid in electronic emission-control equipment, cyanogen more than 99% is converted into CN in cathode chamber
-then under electro ultrafiltration, move, through anion-exchange membrane, enter anode chamber, and generate pure HCN gas, the HCN gas generating enters HCN and reclaims storage tank, by clear water, absorbed and generate hydrogen cyanide, hydrogen cyanide solution enters charcoal fluid bed, oxidized generation NH under the effect of the catalyst in charcoal fluid bed
3, the catalyst on the filler in charcoal fluid bed can be accelerated to be oxidized HCN and generate NH
3, improve and process ability and the recovery NH that HCN pollutes
3efficiency, reaction equation is
, the NH of generation
3enter tourie, the acid being absorbed in tank absorbs, and is converted into (NH
4)
2sO
4, NH
4cl or (NH
4)
3p
3o
4product; Initial spray liquid in spray liquid pool 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%, carry out the HCN intermittently or in the continuous electronic emission-control equipment of spray-absorption, spray head is the spiral spray assembly of wing, spray liquid tangentially disperses to form tiny cloud point, HCN is dissolved in and in these cloud points, forms efficient absorption efficiency, the anolyte producing in electronic emission-control equipment and catholyte are drawn, enter respectively anode flow container, negative electrode flow container, liquid storage in anode flow container and negative electrode flow container enters neutralization pond neutralization, and neutralizer is for supplementing the spray liquid in spray pond; Low concentration residual after electronic emission-control equipment is processed is containing CN
-solution enters electric Fenton device, by CN
-be converted into CO
2.
Compared with prior art, the present invention has the following advantages:
1) stable without interruption purification, containing cyanogen waste gas, is reclaimed cyanogen, for commercial Application simultaneously continuously;
2) neutralizer can supplement spray liquid, forms circulation;
3), by changing waste into resources utilization, reclaim the HCN in waste gas, as the raw material of producing Inorganic Ammonium (ammonium sulfate, ammonium chloride, ammonium phosphate etc.);
4) low concentration CN
-adopt electric Fenton device by CN
-be converted into CO
2, realize cyanogen zero-emission.
Accompanying drawing explanation
Fig. 1 is that cyanogen/oxid-reclamatiom NH is reclaimed in electric power migration
3apparatus structure schematic diagram;
Fig. 2 is that cyanogen/oxid-reclamatiom NH is reclaimed in electric power migration
3method And Principle figure;
In figure: exhaust gas centralized gas hood 1, pressure controller 2, electronic emission-control equipment 3, HCN reclaims storage tank 4, other gas processing devices 5, by-pass valve control 6, on-line monitoring device 7, charcoal fluid bed 8, fluid bed filler 9, air steel cylinder 10, air blast 11, tourie 12, spray liquid pool 13, sprinkling equipment 14, anode flow container 15, negative electrode flow container 16, neutralization pond 17, cathodic electricity Fenton device 18, ion selectivity exchange membrane 19, inertia filler 20, anode chamber 21, cathode chamber 22, first anode plate 23, the first minus plate 24, the first dc source 25, second plate plate 26, the second minus plate 27, the second dc source 28.
The specific embodiment
As shown in Figure 1, cyanogen/oxid-reclamatiom NH is reclaimed in electric power migration
3device comprise exhaust gas centralized gas hood 1, pressure controller 2, electronic emission-control equipment 3, HCN reclaims storage tank 4, other gas processing devices 5, by-pass valve control 6, on-line monitoring device 7, charcoal fluid bed 8, fluid bed filler 9, air steel cylinder 10, air blast 11, tourie 12, spray liquid pool 13, sprinkling equipment 14, anode flow container 15, negative electrode flow container 16, neutralization pond 17, cathodic electricity Fenton device 18, ion selectivity exchange membrane 19, inertia filler 20, anode chamber 21, cathode chamber 22, first anode plate 23 and second plate plate 26, the first minus plate 24 and the second minus plate 27, the first dc source 25 and the second dc source 28, electronic emission-control equipment 3 comprises ion selectivity exchange membrane 19, anode chamber 21, cathode chamber 22, inertia filler 20, first anode plate 23, the first minus plate 24, electronic emission-control equipment 3 bodies are separated into anode chamber 21 with ion selectivity exchange membrane 19, cathode chamber 22, in anode chamber 21 and cathode chamber 22, be filled with inertia filler 20, in anode chamber 21, be provided with first anode plate 23, first anode plate 23 is connected with the first dc source 25 positive poles, in cathode chamber 22, be provided with the first minus plate 24, the first minus plate 24 is connected with the first dc source 25 negative poles, exhaust gas centralized gas hood 1 is connected with the cathode chamber 22 of electronic emission-control equipment 3 through pressure controller 2, 21 tops, anode chamber are reclaimed storage tank 4 through pressure controller 2 with HCN and are connected, HCN reclaims storage tank 4 tops through by-pass valve control 6, on-line monitoring device 7 is connected with charcoal fluid bed 6 bottoms, air steel cylinder 10 is connected with charcoal fluid bed 8 through air blast 11, fluid bed 8 outlets are connected with tourie 12 through by-pass valve control 6, spray liquid pool 13 is through by- pass valve control 6, 14 minutes two-way of on-line monitoring device 7 and sprinkling equipment, wherein, 22 tops, Yi Luyu anode chamber are connected, another road is connected with cathode chamber 22 tops, cathode chamber 24 top outlets are connected with other gas treatment equipments 5, 21 bottoms, anode chamber are through on-line monitoring device 7, by-pass valve control 6 is connected with anode flow container 15 tops, anode flow container 15 bottoms are connected with neutralization pond 16 tops through by-pass valve control 6, cathode chamber 22 bottoms are connected with negative electrode flow container 16 tops through on-line monitoring device 7, negative electrode flow container 16 goes out moisture two-way, one tunnel is connected with neutralization pond 15 tops through by-pass valve control 6, another road is connected with cathodic electricity Fenton device 18 tops through by-pass valve control 6, neutralization pond 17 is connected with spray liquid pool 13, in charcoal fluid bed 8, there is filler 9, cathodic electricity Fenton device 18 comprises second plate plate 26, the second minus plate 27, the second dc source 28, second plate plate 26 is connected with the positive pole of the second dc source 28, the second minus plate 27 is connected with the second dc source 28 negative poles.
In described charcoal fluid bed 8, be provided with filler 9, filler is one or more in straw charcoal or coconut husk charcoal, filler Surface mulch one deck catalyst, one or more in metallic catalyst, metal oxide catalyst, complex compound catalyst, rare earth catalyst, molecular sieve catalyst of catalyst, metal in described metallic catalyst is Cu, Ni, Pt, Fe, and the oxide in metal oxide catalyst is ZrO
2, TiO
2, WO
3, Al
2o
3, Fe
2o
3, complex compound catalyst is polyvinyl siloxane-platinum complex, titanium chelate, molecular sieve catalyst is natural zeolite, aluminum phosphate.
In described HCN absorption plant 4, be provided with clear water; In tourie 12, be provided with sulfuric acid, nitric acid, hydrochloric acid or phosphoric acid; Ion selectivity exchange membrane 19 is homogeneous-phase anion exchange film or out-phase anion-exchange membrane.
Described first anode plate 23 and the material of second plate plate 26 are graphite, active carbon fiber felt, active carbon fiber fabrics and are coated with PbO
2, RuO
2, IrO
2, TiO
2, MnO
2in at least one conducting metal or metal oxide, the material of the first minus plate 24 is stainless steel electrode, graphite, active carbon fiber felt, active carbon fiber fabrics and is coated with PbO
2, RuO
2, IrO
2, TiO
2, MnO
2in at least one conducting metal or metal oxide, the material of the second minus plate 27 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 inertia filler 20 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.
As shown in Figure 2, put electric power migration and reclaim cyanogen/oxid-reclamatiom NH
3method be: electronic emission-control equipment 3 produces direct current more than 20V, impels a large amount of H of the interior generation in anode chamber 21
+, form acid atmosphere, pH≤1.0, cathode chamber 22 produces a large amount of OH
-, form alkaline atmosphere, pH>=14.0, in exhaust gas centralized gas hood 1 containing after cyanogen waste gas absorbs by spray liquid in electronic emission-control equipment 3, cyanogen more than 99% is converted into CN in cathode chamber 22
-then under electro ultrafiltration, move, through anion-exchange membrane 19, enter anode chamber 21, and generate pure HCN gas, the HCN gas generating enters HCN and reclaims storage tank 4, by clear water, absorbed and generate hydrogen cyanide, hydrogen cyanide solution enters charcoal fluid bed 8, oxidized generation NH under the effect of the catalyst in charcoal fluid bed 8
3, the catalyst on the filler in charcoal fluid bed 8 can be accelerated to be oxidized HCN and generate NH
3, improve and process ability and the recovery NH that HCN pollutes
3efficiency, reaction equation is
, the NH of generation
3enter tourie 12, the acid being absorbed in tank 12 absorbs, and is converted into (NH
4)
2sO
4, NH
4cl or (NH
4)
3p
3o
4product, initial spray liquid in spray liquid pool 13 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%, carry out the HCN intermittently or in the continuous electronic emission-control equipment 3 of spray-absorption, the spiral spray assembly that spray head 14 is wing, spray liquid tangentially disperses to form tiny cloud point, HCN is dissolved in and in these cloud points, forms efficient absorption efficiency, the anolyte and the catholyte that in electronic emission-control equipment 3, produce are drawn, enter respectively anode flow container 15, negative electrode flow container 16, liquid storage in anode flow container 15 and negative electrode flow container 16 enters neutralization pond 17 neutralizations, neutralizer is for supplementing the spray liquid in spray pond 13, low concentration residual after electronic emission-control equipment 3 is processed is containing CN
-solution enters electric Fenton device 18, by CN
-be converted into CO
2.
Adopt a kind of electric power migration as shown in Figure 1 to reclaim cyanogen/oxid-reclamatiom NH
3device reclaim carbon fiber containing the HCN in cyanogen waste gas.In waste gas, HCN concentration is 30mg/m
3, flow is 100m
3/ h, the time of staying is 10min, through electric power, migration is reclaimed with purification and can be obtained containing reclaiming storage tank at HCN after the device of cyanogen waste gas the HCN gas that purity is 98%-99.5%, the clear water being reclaimed in storage tank by HCN absorbs generation hydrogen cyanide, under the effect of the metal oxide catalyst of hydrogen cyanide in coconut husk charcoal fluid bed, is oxidized to pure NH
3, in tourie, having concentration is 75%～78% H
2sO
4, finally can obtain purity is more than 98.5% (NH
3)
2sO
4.In the gas discharging after cathodic electricity Fenton device is processed, the content of HCN is lower than 0.05mg/Nm
3, well below HCN GB maximum permissible concentration, be 0.3mg/Nm
3.Wherein, electronic emission-control equipment is of a size of 3m*4m*10m, and anode is titanium plating ruthenium mesh electrode, and negative electrode is the netted electrode of stainless steel, and inertia filler is active porcelain ball.
In embodiment 2, adopt two groups of electronic emission-control equipments series connection to reclaim the HCN in calcium carbide furnace gas, operating procedure, that HCN reclaims principle is identical with embodiment 1.In waste gas, HCN concentration is 2.45g/m
3, flow is 1000m
3/ h, furnace gas divides two-way to enter the electronic emission-control equipment of two-stage, and the time of staying is 20min, and through electric power, cyanogen/oxid-reclamatiom NH is reclaimed in migration
3device after, at HCN, reclaim storage tank and can obtain the HCN gas that purity is 97%-98.5%, by HCN, reclaimed clear water in storage tank and absorb and generate hydrogen cyanide, under the effect of the nonmetal oxide catalyst of hydrogen cyanide in straw charcoal fluid bed, be oxidized to pure NH
3, in tourie, having concentration is 90%～93% H
2sO
4, the more than 99.9% (NH that finally can obtain purity and be
3)
2sO
4.In the gas discharging after cathodic electricity Fenton device is processed, the content of HCN is lower than 0.25mg/Nm
3, lower than HCN GB maximum permissible concentration, be 0.3mg/Nm
3.Wherein, every grade of electronic emission-control equipment is of a size of 5m*4m*10m, and anode is titanium plating ruthenium mesh electrode, and negative electrode is the netted electrode of stainless steel, and inertia filler is active porcelain ball.
In embodiment 3, adopt two groups of electronic emission-control equipments series connection to reclaim the HCN in calcium carbide furnace gas, operating procedure, that HCN reclaims principle is identical with embodiment 1.In waste gas, HCN concentration is 2.45g/m
3, a minute two-way enters the electronic emission-control equipment of two-stage, and through electric power, migration is reclaimed and is purified containing after the device of cyanogen waste gas, and HCN clean gas contacts with HCl absorption liquid is reverse, through electric power migration recovery hydrogen cyanide, prepares NH
4after the device of Cl, in products pot, can obtain the NH that purity is 97%-98.5%
4cl product.
Claims (6)
1. cyanogen/oxid-reclamatiom NH is reclaimed in an electric power migration
3device, it is characterized in that comprising exhaust gas centralized gas hood (1), pressure controller (2), electronic emission-control equipment (3), HCN reclaims storage tank (4), other gas treatment equipments (5), by-pass valve control (6), on-line monitoring device (7), charcoal fluid bed (8), fluid bed filler (9), air steel cylinder (10), air blast (11), tourie (12), spray liquid pool (13), sprinkling equipment (14), anode flow container (15), negative electrode flow container (16), neutralization pond (17), cathodic electricity Fenton device (18), the first dc source (25), electronic emission-control equipment (3) comprises ion selectivity exchange membrane (19), anode chamber (21), cathode chamber (22), inertia filler (20), first anode plate (23), the first minus plate (24), electronic emission-control equipment (3) for body ion selectivity exchange membrane (19) be separated into anode chamber (21), cathode chamber (22), in anode chamber (21) and cathode chamber (22), be filled with inertia filler (20), in anode chamber (21), be provided with first anode plate (23), first anode plate (23) is connected with the first dc source (25) is anodal, in cathode chamber (22), be provided with the first minus plate (24), the first minus plate (24) is connected with the first dc source (25) negative pole, exhaust gas centralized gas hood (1) is connected with the cathode chamber (22) of electronic emission-control equipment (3) through pressure controller (2), top, anode chamber (21) is reclaimed storage tank (4) through pressure controller (2) with HCN and is connected, HCN reclaims storage tank (4) top through by-pass valve control (6), on-line monitoring device (7) is connected with charcoal fluid bed (8) bottom, air steel cylinder (10) is connected with charcoal fluid bed (8) through air blast (11), fluid bed (8) outlet is connected with tourie (12) through by-pass valve control (6), spray liquid pool (13) is through by-pass valve control (6), on-line monitoring device (7) and sprinkling equipment (14) minute two-way, wherein, top, Yi Luyu anode chamber (22) is connected, another road is connected with cathode chamber (22) top, the outlet of cathode chamber top is connected with other gas treatment equipments (5), bottom, anode chamber (21) is through on-line monitoring device (7), by-pass valve control (6) is connected with anode flow container (15) top, anode flow container (15) bottom is connected with neutralization pond (17) top through by-pass valve control (6), cathode chamber (22) bottom is connected with negative electrode flow container (16) top through on-line monitoring device (7), negative electrode flow container (16) goes out moisture two-way, one tunnel is connected with neutralization pond (17) top through by-pass valve control (6), another road is connected with cathodic electricity Fenton device (18) top through by-pass valve control (6), neutralization pond (17) is connected with spray liquid pool (13), in charcoal fluid bed (8), there is filler (9), cathodic electricity Fenton device (18) comprises second plate plate (26), the second minus plate (27), the second dc source (28), second plate plate (26) is connected with the positive pole of the second dc source (28), the second minus plate (27) is connected with the second dc source (28) negative pole.
2. cyanogen/oxid-reclamatiom NH is reclaimed in a kind of electric power migration according to claim 1
3device, it is characterized in that being provided with filler (9) in described charcoal fluid bed (8), filler is one or more in straw charcoal or coconut husk charcoal, filler Surface mulch one deck catalyst, one or more in metallic catalyst, metal oxide catalyst, complex compound catalyst, rare earth catalyst, molecular sieve catalyst of catalyst, metal in described metallic catalyst is Cu, Ni, Pt, Fe, and the oxide in metal oxide catalyst is ZrO
2, TiO
2, WO
3, Al
2o
3, Fe
2o
3, complex compound catalyst is polyvinyl siloxane-platinum complex, titanium chelate, molecular sieve catalyst is natural zeolite, aluminum phosphate.
3. cyanogen/oxid-reclamatiom NH is reclaimed in a kind of electric power migration according to claim 1
3device, it is characterized in that described HCN reclaims in storage tank (4) to be provided with clear water; Tourie is provided with sulfuric acid, nitric acid, hydrochloric acid or phosphoric acid in (12); Ion selectivity exchange membrane (19) is homogeneous-phase anion exchange film or out-phase anion-exchange membrane.
4. cyanogen/oxid-reclamatiom NH is reclaimed in a kind of electric power migration according to claim 1
3device, it is characterized in that described first anode plate (23) and the material of second plate plate (26) are graphite, active carbon fiber felt, active carbon fiber fabrics and are coated with PbO
2, RuO
2, IrO
2, TiO
2, MnO
2in at least one conducting metal or metal oxide, the material of the first minus plate (24) is stainless steel electrode, graphite, active carbon fiber felt, active carbon fiber fabrics and is coated with PbO
2, RuO
2, IrO
2, TiO
2, MnO
2in at least one conducting metal or metal oxide, the material of the second minus plate (27) 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.
5. cyanogen/oxid-reclamatiom NH is reclaimed in a kind of electric power migration according to claim 1
3device, it is characterized in that described inertia filler (20) for convex-concave trenches openings porcelain ball, active porcelain ball, Pored ceramic ball, micropore porcelain ball, accumulation of heat porcelain ball, grind one or more in porcelain ball, three shape porous porcelains, resin extender.
6. cyanogen/oxid-reclamatiom NH is reclaimed in the electric power migration that a use is installed as claimed in claim 1
3method, it is characterized in that electronic emission-control equipment (3) produces direct current more than 20V, impel and produce a large amount of H in anode chamber (21)
+, form acid atmosphere, pH≤1.0, cathode chamber (22) produces a large amount of OH
-, form alkaline atmosphere, pH>=14.0; In exhaust gas centralized gas hood (1) containing after cyanogen waste gas absorbs by spray liquid in electronic emission-control equipment (3), cyanogen more than 99% is converted into CN in cathode chamber (22)
-then under electro ultrafiltration, move, through anion-exchange membrane (19), enter anode chamber (21), and generate pure HCN gas, the HCN gas generating enters HCN and reclaims storage tank (4), by clear water, absorbed and generate hydrogen cyanide, hydrogen cyanide solution enters charcoal fluid bed (8), oxidized generation NH under the effect of the catalyst in charcoal fluid bed (8)
3, the catalyst on the filler in charcoal fluid bed (8) can be accelerated to be oxidized HCN and generate NH
3, improve and process ability and the recovery NH that HCN pollutes
3efficiency, reaction equation is
, the NH of generation
3enter tourie (12), the acid being absorbed in tank (12) absorbs, and is converted into (NH
4)
2sO
4, NH
4cl or (NH
4)
3p
3o
4product, initial spray liquid in spray liquid pool (13) 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%, carry out the HCN intermittently or in the continuous electronic emission-control equipment of spray-absorption (3), the spiral spray assembly that sprinkling equipment (14) is wing, spray liquid tangentially disperses to form tiny cloud point, HCN is dissolved in and in these cloud points, forms efficient absorption efficiency, the anolyte and the catholyte that in electronic emission-control equipment (3), produce are drawn, enter respectively anode flow container (15), negative electrode flow container (16), liquid storage in anode flow container (15) and negative electrode flow container (16) enters neutralization pond (17) neutralization, neutralizer is for supplementing the spray liquid in spray liquid pool (13), low concentration residual after electronic emission-control equipment (3) is processed is containing CN
-solution enters electric Fenton device (18), by CN
-be converted into CO
2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210394673.0A CN102872690B (en) | 2012-10-17 | 2012-10-17 | Device and method for recovering cyanogen through electric migration and recovering NH3 through oxidation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210394673.0A CN102872690B (en) | 2012-10-17 | 2012-10-17 | Device and method for recovering cyanogen through electric migration and recovering NH3 through oxidation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102872690A CN102872690A (en) | 2013-01-16 |
| CN102872690B true CN102872690B (en) | 2014-05-07 |
Family
ID=47474337
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210394673.0A Active CN102872690B (en) | 2012-10-17 | 2012-10-17 | Device and method for recovering cyanogen through electric migration and recovering NH3 through oxidation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102872690B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107913595B (en) * | 2016-10-09 | 2019-12-10 | 中国石油化工股份有限公司 | Catalytic oxidation treatment method of cyanogen-containing waste gas |
| CN107913594B (en) * | 2016-10-09 | 2019-12-10 | 中国石油化工股份有限公司 | Method for removing cyanogen-containing waste gas |
| CN109621663A (en) * | 2018-12-26 | 2019-04-16 | 安徽欣冉碳纤维环保科技有限公司 | Pollutant handling arrangement and processing method in a kind of production of carbon fiber |
| CN114011408A (en) * | 2021-09-23 | 2022-02-08 | 北京化工大学 | Process method for treating carbon fiber production process waste gas by using molecular sieve catalyst |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5594675A (en) * | 1979-01-15 | 1980-07-18 | Sumikin Coke Co Ltd | Method of processing drained water from coke production plant |
| JPH07116628A (en) * | 1993-10-26 | 1995-05-09 | Mitsubishi Heavy Ind Ltd | Incineration ash heat treatment equipment |
| WO1998049355A1 (en) * | 1997-04-28 | 1998-11-05 | Kaszas Savos Melania | Process and device for recovering raw materials from waste and residues |
| JP2010058063A (en) * | 2008-09-04 | 2010-03-18 | Chubu Electric Power Co Inc | Decomposition treatment method, decomposition treatment agent, and decomposition treatment device of fluoride gas |
-
2012
- 2012-10-17 CN CN201210394673.0A patent/CN102872690B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5594675A (en) * | 1979-01-15 | 1980-07-18 | Sumikin Coke Co Ltd | Method of processing drained water from coke production plant |
| JPH07116628A (en) * | 1993-10-26 | 1995-05-09 | Mitsubishi Heavy Ind Ltd | Incineration ash heat treatment equipment |
| WO1998049355A1 (en) * | 1997-04-28 | 1998-11-05 | Kaszas Savos Melania | Process and device for recovering raw materials from waste and residues |
| JP2010058063A (en) * | 2008-09-04 | 2010-03-18 | Chubu Electric Power Co Inc | Decomposition treatment method, decomposition treatment agent, and decomposition treatment device of fluoride gas |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102872690A (en) | 2013-01-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104743727B (en) | A kind of desulfurization wastewater cooperates with the System and method for of demercuration | |
| CN107235537B (en) | Electrochemical nitrogen and phosphorus removal method for sewage | |
| CN206069598U (en) | A kind of wiring board ammonia nitrogen waste water electrochemical reactor processes complexes | |
| CN102872690B (en) | Device and method for recovering cyanogen through electric migration and recovering NH3 through oxidation | |
| CN106186185B (en) | Method for preparing high-purity nickel salt by recycling industrial nickel-containing wastewater | |
| CN204550306U (en) | A kind of desulfurization wastewater works in coordination with the system of demercuration | |
| CN102872704B (en) | Device and method for purifying residual HCN (hydrogen cyanide) through electro-Fenton | |
| CN106396029A (en) | Arsenic removal method of SCR catalyst | |
| CN102895853B (en) | Device and method for electro-dynamic migration recovery and cyanogen-containing waste gas purification | |
| CN113023840A (en) | Method and reaction device for degrading organic wastewater | |
| CN102774934A (en) | Method for treating high-concentration ammonia nitrogen in metallurgical wastewater | |
| CN108726740A (en) | A kind of high sodium chloride waste water Zero discharge treatment method | |
| CN107662965A (en) | A kind of electrolysis unit and method for removing ammonia nitrogen in ammonia alkali waste water | |
| CN102872705B (en) | Device and method for carrying out electro-Fenton oxidization on HCN (hydrogen cyanide) by using liquid-phase method | |
| CN207738494U (en) | A kind of electrolysis unit removing ammonia nitrogen in ammonia alkali waste water | |
| CN109603464B (en) | Metallurgical waste gas treatment device | |
| CN102895854B (en) | Device for preparing silver cyanide (AgCN) by recovering hydrogen cyanide (HCN) through electrodynamic migration and method for device | |
| CN114524493B (en) | Ammonia recovery device and method for electrochemically treating nitrate wastewater | |
| CN111378984B (en) | Device and method for preparing chlorine and sodium hypochlorite by electrolyzing ammonium chloride wastewater | |
| CN102774933B (en) | Method for processing high-concentration ammonia nitrogen in rare earth wastewater | |
| CN202499779U (en) | Nickel-containing washing water treatment equipment | |
| CN205892820U (en) | System for ammonia nitrogen in electrolytic oxidation method processing ammonia nature copper chloride waste water | |
| CN202265446U (en) | Carbon electrode for waste water treatment | |
| CN205076931U (en) | No wastewater discharge's wet flue gas desulfurization system | |
| CN204816190U (en) | Indisputable carbon electrolysis flue gas denitration device is reinforceed to extra electric field |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |