CN102732730B - Recovery method for vanadium component in selective catalytic reduction denitration catalyst - Google Patents
Recovery method for vanadium component in selective catalytic reduction denitration catalyst Download PDFInfo
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- CN102732730B CN102732730B CN2012102202969A CN201210220296A CN102732730B CN 102732730 B CN102732730 B CN 102732730B CN 2012102202969 A CN2012102202969 A CN 2012102202969A CN 201210220296 A CN201210220296 A CN 201210220296A CN 102732730 B CN102732730 B CN 102732730B
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- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 title claims abstract description 48
- 229910052720 vanadium Inorganic materials 0.000 title claims abstract description 42
- 239000003054 catalyst Substances 0.000 title claims abstract description 40
- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000010531 catalytic reduction reaction Methods 0.000 title claims abstract description 15
- 238000011084 recovery Methods 0.000 title abstract description 8
- 238000005868 electrolysis reaction Methods 0.000 claims abstract description 64
- 239000000243 solution Substances 0.000 claims abstract description 42
- 239000011259 mixed solution Substances 0.000 claims abstract description 15
- 239000002699 waste material Substances 0.000 claims abstract description 15
- 239000007787 solid Substances 0.000 claims abstract description 13
- 238000001914 filtration Methods 0.000 claims abstract description 9
- 150000003863 ammonium salts Chemical class 0.000 claims abstract description 7
- 239000012266 salt solution Substances 0.000 claims abstract description 7
- 238000000926 separation method Methods 0.000 claims abstract description 6
- 230000005611 electricity Effects 0.000 claims description 16
- 239000002585 base Substances 0.000 claims description 15
- NWJUARNXABNMDW-UHFFFAOYSA-N tungsten vanadium Chemical compound [W]=[V] NWJUARNXABNMDW-UHFFFAOYSA-N 0.000 claims description 15
- 238000002156 mixing Methods 0.000 claims description 10
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 9
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 8
- 239000008151 electrolyte solution Substances 0.000 claims description 8
- 238000006722 reduction reaction Methods 0.000 claims description 8
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims description 7
- 239000003637 basic solution Substances 0.000 claims description 6
- 238000001556 precipitation Methods 0.000 claims description 6
- 238000001354 calcination Methods 0.000 claims description 5
- 238000010298 pulverizing process Methods 0.000 claims description 5
- HUCVOHYBFXVBRW-UHFFFAOYSA-M caesium hydroxide Chemical compound [OH-].[Cs+] HUCVOHYBFXVBRW-UHFFFAOYSA-M 0.000 claims description 4
- CPRMKOQKXYSDML-UHFFFAOYSA-M rubidium hydroxide Chemical compound [OH-].[Rb+] CPRMKOQKXYSDML-UHFFFAOYSA-M 0.000 claims description 4
- 239000011780 sodium chloride Substances 0.000 claims description 4
- 235000011114 ammonium hydroxide Nutrition 0.000 claims description 2
- 238000006243 chemical reaction Methods 0.000 abstract description 5
- 230000008901 benefit Effects 0.000 abstract description 4
- 239000003513 alkali Substances 0.000 abstract 1
- 238000010304 firing Methods 0.000 abstract 1
- WKXHZKXPFJNBIY-UHFFFAOYSA-N titanium tungsten vanadium Chemical compound [Ti][W][V] WKXHZKXPFJNBIY-UHFFFAOYSA-N 0.000 abstract 1
- 239000000126 substance Substances 0.000 description 10
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 4
- 239000003546 flue gas Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- PSDQQCXQSWHCRN-UHFFFAOYSA-N vanadium(4+) Chemical compound [V+4] PSDQQCXQSWHCRN-UHFFFAOYSA-N 0.000 description 3
- 229910000287 alkaline earth metal oxide Inorganic materials 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000008929 regeneration Effects 0.000 description 2
- 238000011069 regeneration method Methods 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- GQPLMRYTRLFLPF-UHFFFAOYSA-N Nitrous Oxide Chemical class [O-][N+]#N GQPLMRYTRLFLPF-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 150000001342 alkaline earth metals Chemical class 0.000 description 1
- 229910052785 arsenic Inorganic materials 0.000 description 1
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 description 1
- 229910001038 basic metal oxide Inorganic materials 0.000 description 1
- 150000003818 basic metals Chemical class 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000009849 deactivation Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000003837 high-temperature calcination Methods 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 230000007096 poisonous effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000002829 reductive effect Effects 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Landscapes
- Catalysts (AREA)
Abstract
The invention relates to a recovery method for the component of vanadium in a selective catalytic reduction denitration catalyst, which belongs to the technical field of catalyst recovery. The method comprises the following steps: smashing a waste vanadium-tungsten-titanium based catalyst, adding the smashed catalyst into an electrolytic bath for electrolysis so as to obtain negative electrode mixed liquor in the electrolytic bath, and carrying out filtration and separation on the negative electrode mixed liquor to obtain a vanadium-containing mixed solution; subjecting the vanadium-containing mixed solution to secondary electrolysis so as to obtain secondary electrolysis positive electrode mixed liquor; and adjusting the pH value of the positive electrode mixed liquor with an alkali solution, then reacting an ammonium salt solution with the positive electrode mixed liquor overnight so as to allow vanadium to be precipitated, carrying out filtration to obtain a white solid, and firing the white solid to obtain a recovered product, i.e., a pale yellow solid containing vanadium. The recovery method provided in the invention has the following advantages: the method can be carried out at normal temperature, reaction conditions are mild, an electrolytic reaction has good chemical reaction selectivity, and complete recovery of the component of vanadium can be realized substantially.
Description
Technical field
The present invention relates to a kind of method that denitrifying catalyst with selective catalytic reduction vanadium component reclaims, belong to the catalyst recovery technical field.
Background technology
Along with the control of national team's discharged nitrous oxides during " 12 " is more and more stricter, SCR (SCR) technology is widely used in the denitrating system of coal-burning power plant because of its efficient and reliable denitration performance.The cardinal principle of SCR technique is to spray into NH in the boiler emission flue gas
3Deng reductive agent, under the effect of catalyzer, the N harmless with the NOx generation in flue gas
2And H
2O。
The technological core of SCR technique is vanadium tungsten Ti-base catalyst, exists the active problem that descends in operational process.Cause the reason of catalyst deactivation to have a lot, the impact of existing operation condition, such as the dust in flue gas and temperature fluctuation meeting cause damage to catalyzer macroscopic view result, the effect of various poisonous and harmful chemical compositions in flue gas is also arranged, and wherein the toxic action that has of arsenic element, basic metal, alkaline-earth metal and metal oxide is the most obvious.
The processing of spent catalyst can be divided into regeneration and reclaim two portions.Catalyst regeneration is mainly can recover the catalyzer of denitration performance for some; For the spent catalyst that can't regenerate, the processing mode that has economic benefit most is exactly the metallic element that reclaims wherein, comprises the recovery of vanadium, tungsten, titanium elements.At present metallic element way of recycling commonly used is to add alkaline matter to carry out high-temperature calcination then to separate by operations such as water logging precipitations and obtain various metallic elements.
Summary of the invention
The purpose of this invention is to provide a kind of method that brand-new denitrifying catalyst with selective catalytic reduction vanadium component reclaims, not by the high temperature sodium roasting, have the advantage of certain saving energy in the vanadium component reclaims.
According to technical scheme provided by the invention, a kind of method that denitrifying catalyst with selective catalytic reduction vanadium component reclaims, step is as follows:
(1) pulverize: get waste and old vanadium tungsten Ti-base catalyst and be crushed to 200 ~ 300 orders;
(2) electrolysis: get electrolyzer, all add the strong electrolytic solution of the anti-reduction of 2 ~ 10mol/L in the positive and negative polarities electrolyzer, the waste and old vanadium tungsten Ti-base catalyst of getting step (1) pulverizing adds in the electrolyzer negative pole, and the control electrolytic current density is 60 ~ 100mA/cm
2Carrying out constant-current electrolysis or controlling electrolysis voltage is that 2 ~ 6V carries out constant-potential electrolysis;
(3) separate: after the power taking solution in electrolyzer the negative pole mixed solution carry out filtering separation with Büchner funnel, obtain containing the mixing solutions of vanadium mass concentration 10% ~ 18%;
(4) re-electrolysis: again get another electrolyzer, contain the vanadium mixing solutions what the electrolyzer positive pole added step (3) to separate to obtain, negative pole adds the strong electrolytic solution of the anti-reduction of 2 ~ 10mol/L, and the control electrolytic current density is 60 ~ 100mA/cm
2Carrying out constant-current electrolysis or controlling electrolysis voltage is that 2 ~ 6V carries out constant-potential electrolysis;
(5) aftertreatment: getting the anodal mixed solution of gained after step (4) re-electrolysis, to be adjusted to pH with the basic solution of mass concentration 10% ~ 50% be 10 ~ 12, then use the precipitation of spending the night of the ammonium salt solution of 120 ~ 300g/L, filtration obtains white solid, after 450 ~ 690 ℃ of calcination 1 ~ 5h, the product after being recycled contains the faint yellow solid of vanadium.
During step (2) electrolysis, required electrolysis electricity Q (Ah) calculates according to the amount that contains vanadium in the waste and old vanadium tungsten Ti-base catalyst that adds, and calculating formula is as follows:
Q(Ah)=0.32×m×V
2O
5%(Ah)；
Wherein, m is the quality of waste and old vanadium tungsten Ti-base catalyst, and unit is g; V
2O
5% contains V in spent catalyst
2O
5Mass percentage content, unit is 1.
The chemical equation of electrolysis is as follows:
Anodal: 2H
2O-4e-〉 4H
++ O
2↑;
Negative pole: V
2O
5+ 6H
++ 2e-〉 2VO
2++ 3H
2O, VO
2++ 2H
++ e-〉 V
3++ H
2O。
The required electrolysis electricity Q of step (4) re-electrolysis (Ah) obtains according to the cubage of vanadium in positive solution in electrolyzer (IV), and calculating formula is as follows:
Q(Ah)=0.58×m×V(IV)%(Ah)；
Wherein, m is the quality of electrolyzer positive solution, and unit is g; V(IV) % is V(IV in the electrolyzer positive solution) mass percentage content, unit is 1.
The chemical equation of electrolysis is as follows:
Anodal: 2VO
2++ 3H
2O-2e-〉 V
2O
5+ 6H
+, V
3++ H
2O-e-〉 VO
2++ 2H
+
Negative pole: 2H
++ 2e-〉 H
2↑.
The concentration of the strong electrolytic solution of described anti-reduction is 3 ~ 5mol/L.The strong electrolytic solution of described anti-reduction is Na
2SO
4, K
2SO
4, NaNO
3, KNO
3, NaCl, KCl or H
2SO
4Solution.
The described basic solution mass concentration of step (5) is 10% ~ 50%.Described basic solution is ammoniacal liquor, KOH, RbOH, CsOH or NaOH solution.
The described ammonium salt solution concentration of step (5) is 120 ~ 300g/L.Described ammonium salt solution is NH
4Cl, NH
4NO
3Or (NH
4)
2SO
4Solution.
The present invention has following advantage: the present invention can operate at normal temperatures, and reaction conditions is comparatively gentle, and electrolytic reaction has selectivity of chemical equation preferably, and basically can accomplish the recovery fully of vanadium component.
Embodiment
Embodiment 1
(1) pulverize: get waste and old vanadium tungsten Ti-base catalyst and be crushed to 200 ~ 300 orders;
(2) electrolysis: get electrolyzer, all add the H of 4mol/L in the positive and negative polarities electrolyzer
2SO
4Solution, the waste and old vanadium tungsten Ti-base catalyst of getting step (1) pulverizing adds in the electrolyzer negative pole, and the control electrolytic current density is 80mA/cm
2Carry out constant-current electrolysis;
The chemical equation of electrolysis is as follows:
Anodal: 2H
2O-4e-〉 4H
++ O
2↑;
Negative pole: V
2O
5+ 6H
++ 2e〉2VO
2++ 3H
2O, VO
2++ 2H
++ e〉V
3++ H
2O；
Electrolysis electricity can calculate according to vanadium (V) content in electrolyzer negative pole mixed solution, calculates electrolysis electricity Q (Ah)=32Ah by following formula:
Q (Ah)=0.32 * m * V
2O
5% (Ah), wherein, m=10000g; V
2O
5%=1%;
(3) separate: negative pole mixed solution filtering separation in electrolyzer after the power taking solution obtains containing the mixing solutions of vanadium mass concentration 12%;
(4) re-electrolysis: again get another electrolyzer, contain the vanadium mixing solutions what the electrolyzer positive pole added step (3) to separate to obtain, negative pole adds the H of 4mol/L
2SO
4Solution, the control electrolytic current density is 80mA/cm
2Carry out constant-current electrolysis;
The chemical equation of electrolysis is as follows:
Anodal: 2VO
2++ 3H
2O-2e-〉 V
2O
5+ 6H
+, V
3++ H
2O-e-〉 VO
2++ 2H
+
Negative pole: 2H
++ 2e-〉 H
2↑;
Electrolysis electricity can calculate according to vanadium (IV) content in the electrolyzer positive solution, calculates electrolysis electricity Q (Ah)=55.68Ah by following formula:
Q (Ah)=0.58 * m * V (IV) % (Ah), wherein, m=800g; V(IV) %=12%;
(5) aftertreatment: get and use 120g/LNH after the anodal mixed solution 10%NaOH of gained solution is regulated pH to 11 after step (4) re-electrolysis
4The precipitation of spending the night of Cl solution is filtered and is obtained white solid, and after 450 ℃ of calcinations, the product after being recycled contains the faint yellow solid of vanadium, wherein contains 58% vanadium (V) component.
Embodiment 2
(1) pulverize: get waste and old vanadium tungsten Ti-base catalyst and be crushed to 200 ~ 300 orders;
(2) electrolysis: get electrolyzer, all add the NaNO of 5mol/L in the positive and negative polarities electrolyzer
3Solution, the waste and old vanadium tungsten Ti-base catalyst of getting step (1) pulverizing adds in the electrolyzer negative pole, and the control electrolytic current density is 100mA/cm
2Carry out constant-current electrolysis;
The chemical equation of electrolysis is as follows:
Anodal: 2H
2O-4e-〉 4H
++ O
2↑;
Negative pole: V
2O
5+ 6H
++ 2e-〉 2VO
2++ 3H
2O, VO
2++ 2H
++ e-〉 V
3++ H
2O；
Electrolysis electricity can calculate according to vanadium (V) content in electrolyzer negative pole mixed solution, calculates electrolysis electricity Q (Ah)=48Ah by following formula:
Q (Ah)=0.32 * m * V
2O
5% (Ah), wherein, m=10000g; V
2O
5%=1.5%;
(3) separate: negative pole mixed solution filtering separation in electrolyzer after the power taking solution obtains containing the mixing solutions of vanadium mass concentration 18%;
(4) re-electrolysis: again get another electrolyzer, contain the vanadium mixing solutions what the electrolyzer positive pole added step (3) to separate to obtain, negative pole adds the NaNO of 5mol/L
3Solution, the control electrolytic current density is 100mA/cm
2Carry out constant-current electrolysis;
The chemical equation of electrolysis is as follows:
Anodal: 2VO
2++ 3H
2O-2e-〉 V
2O
5+ 6H
+, V
3++ H
2O-e-〉 VO
2++ 2H
+
Negative pole: 2H
++ 2e-〉 H
2↑;
Electrolysis electricity can calculate according to vanadium (IV) content in the electrolyzer positive solution, calculates electrolysis electricity Q (Ah)=83.52Ah by following formula:
Q(Ah)=0.58×m×V(IV)%(Ah)，m=800g；V（IV）%=18%；
(5) aftertreatment: get and use 120g/LNH after the anodal mixed solution 10%KOH of gained solution is regulated pH to 11 after step (4) re-electrolysis
4NO
3The solution precipitation of spending the night is filtered and is obtained white solid, and after 450 ℃ of calcinations, the product after being recycled contains the faint yellow solid of vanadium, wherein contains 58% vanadium (V) component.
Embodiment 3
(1) pulverize: get waste and old vanadium tungsten Ti-base catalyst and be crushed to 200 ~ 300 orders;
(2) electrolysis: get electrolyzer, all add the NaCl solution of 3mol/L in the positive and negative polarities electrolyzer, the waste and old vanadium tungsten Ti-base catalyst of getting step (1) pulverizing adds in the electrolyzer negative pole, and the control electrolytic current density is 60mA/cm
2Carry out constant-current electrolysis;
The chemical equation of electrolysis is as follows:
Anodal: 2H
2O-4e-〉 4H
++ O
2↑;
Negative pole: V
2O
5+ 6H
++ 2e-〉 2VO
2++ 3H
2O, VO
2++ 2H
++ e-〉 V
3++ H
2O；
Electrolysis electricity can calculate according to vanadium (V) content in electrolyzer negative pole mixed solution, calculates electrolysis electricity Q (Ah)=16Ah by following formula:
Q (Ah)=0.32 * m * V
2O
5% (Ah), wherein, m=10000g; V
2O
5%=0.5%;
(3) separate: negative pole mixed solution filtering separation in electrolyzer after the power taking solution obtains containing the mixing solutions of vanadium mass concentration 10%;
(4) re-electrolysis: again get another electrolyzer, contain the vanadium mixing solutions what the electrolyzer positive pole added step (3) to separate to obtain, negative pole adds the NaCl solution of 3mol/L, and the control electrolytic current density is 60mA/cm
2Carry out constant-current electrolysis;
The chemical equation of electrolysis is as follows:
Anodal: 2VO
2++ 3H
2O-2e-〉 V
2O
5+ 6H
+, V
3++ H
2O-e-〉 VO
2++ 2H
+
Negative pole: 2H
++ 2e-〉 H
2↑;
Electrolysis electricity can calculate according to vanadium (IV) content in the electrolyzer positive solution, calculates electrolysis electricity Q (Ah)=46.4Ah by following formula:
Q(Ah)=0.58×m×V(IV)%(Ah)，m=800g；V（IV）%=10%；
(5) aftertreatment: get after step (4) re-electrolysis the anodal mixed solution of gained and use 120g/L(NH after regulating pH to 11 with strong aqua
4)
2SO
4The solution precipitation of spending the night is filtered and is obtained white solid, and after 450 ℃ of calcinations, the product after being recycled contains the faint yellow solid of vanadium, wherein contains 45% vanadium (V) component.
Claims (9)
1. the method that reclaims of a denitrifying catalyst with selective catalytic reduction vanadium component is characterized in that step is as follows:
(1) pulverize: get waste and old vanadium tungsten Ti-base catalyst and be crushed to 200～300 orders;
(2) electrolysis: get electrolyzer, all add the strong electrolytic solution of the anti-reduction of 2～10mol/L in the positive and negative polarities electrolyzer, the waste and old vanadium tungsten Ti-base catalyst of getting step (1) pulverizing adds in the electrolyzer negative pole, and the control electrolytic current density is 60～100mA/cm
2Carrying out constant-current electrolysis or controlling electrolysis voltage is that 2～6V carries out constant-potential electrolysis;
(3) separate: after the power taking solution in electrolyzer the negative pole mixed solution carry out filtering separation with Büchner funnel, obtain containing the mixing solutions of vanadium mass concentration 10%～18%;
(4) re-electrolysis: again get another electrolyzer, contain the vanadium mixing solutions what the electrolyzer positive pole added step (3) to separate to obtain, negative pole adds the strong electrolytic solution of the anti-reduction of 2～10mol/L, and the control electrolytic current density is 60～100mA/cm
2Carrying out constant-current electrolysis or controlling electrolysis voltage is that 2～6V carries out constant-potential electrolysis;
(5) aftertreatment: getting the anodal mixed solution of gained after step (4) re-electrolysis, to be adjusted to pH with the basic solution of mass concentration 10%～50% be 10～12, then with the precipitation of spending the night of the ammonium salt solution of 120～300g/L, filtration obtains white solid, after 450～690 ℃ of calcination 1～5h, the product after being recycled contains the faint yellow solid of vanadium.
2. the method that reclaims of denitrifying catalyst with selective catalytic reduction vanadium component as claimed in claim 1, it is characterized in that: during step (2) electrolysis, required electrolysis electricity Q (Ah) calculates according to the amount that contains vanadium in the waste and old vanadium tungsten Ti-base catalyst that adds, and calculating formula is as follows:
Q(Ah)=0.32×m×V
2O
5%(Ah)；
Wherein, m is the quality of waste and old vanadium tungsten Ti-base catalyst, and unit is g; V
2O
5% contains V in spent catalyst
2O
5Mass percentage content, unit is 1.
3. the method that reclaims of denitrifying catalyst with selective catalytic reduction vanadium component as claimed in claim 1, it is characterized in that: the required electrolysis electricity Q of step (4) re-electrolysis (Ah) obtains according to the cubage of vanadium in positive solution in electrolyzer (IV), and calculating formula is as follows:
Q(Ah)=0.58×m×V(IV)%(Ah)；
Wherein, m is the quality of electrolyzer positive solution, and unit is g; V(IV) % is V(IV in the electrolyzer positive solution) mass percentage content, unit is 1.
4. the method that reclaims of denitrifying catalyst with selective catalytic reduction vanadium component as claimed in claim 1, it is characterized in that: the concentration of the strong electrolytic solution of described anti-reduction is 3～5mol/L.
5. the method that reclaims of denitrifying catalyst with selective catalytic reduction vanadium component as claimed in claim 4 is characterized in that: the strong electrolytic solution of described anti-reduction and be Na
2SO
4, K
2SO
4, NaNO
3, KNO
3, NaCl, KCl or H
2SO
4Solution.
6. the method that reclaims of denitrifying catalyst with selective catalytic reduction vanadium component as claimed in claim 1, it is characterized in that: the described basic solution mass concentration of step (5) is 10%～50%.
7. the method that reclaims of denitrifying catalyst with selective catalytic reduction vanadium component as claimed in claim 1, it is characterized in that: described basic solution is ammoniacal liquor, KOH, RbOH, CsOH or NaOH solution.
8. the method that reclaims of denitrifying catalyst with selective catalytic reduction vanadium component as claimed in claim 1, it is characterized in that: the described ammonium salt solution concentration of step (5) is 120～300g/L.
9. the method that reclaims of denitrifying catalyst with selective catalytic reduction vanadium component as claimed in claim 8, it is characterized in that: described ammonium salt solution is NH
4Cl, NH
4NO
3Or (NH
4)
2SO
4Solution.
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|---|---|---|---|
| CN2012102202969A CN102732730B (en) | 2012-06-28 | 2012-06-28 | Recovery method for vanadium component in selective catalytic reduction denitration catalyst |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102202969A CN102732730B (en) | 2012-06-28 | 2012-06-28 | Recovery method for vanadium component in selective catalytic reduction denitration catalyst |
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|---|---|
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| CN102732730B true CN102732730B (en) | 2013-11-06 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103966447B (en) * | 2014-05-20 | 2015-12-02 | 漯河兴茂钛业股份有限公司 | A kind of method of waste denitration catalyst comprehensive utilization |
| CN105177298B (en) * | 2015-10-19 | 2017-07-07 | 宁波大学 | A kind of method that vanadium oxide is reclaimed in the denitrating catalyst from failure |
| CN107970910A (en) * | 2016-10-25 | 2018-05-01 | 中国石油化工股份有限公司 | A kind of method that spent vanadium catalyst recycles |
| CN107419104B (en) * | 2017-07-24 | 2019-03-29 | 航天龙源(北京)环保科技发展有限公司 | The comprehensive recovering process of useless SCR denitration |
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