CN201942756U - Diffusion electrode alkaline making device - Google Patents
Diffusion electrode alkaline making device Download PDFInfo
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- CN201942756U CN201942756U CN201020698711.8U CN201020698711U CN201942756U CN 201942756 U CN201942756 U CN 201942756U CN 201020698711 U CN201020698711 U CN 201020698711U CN 201942756 U CN201942756 U CN 201942756U
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- oxygen
- diffusion electrode
- system alkali
- electrode system
- air chamber
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Abstract
The utility model relates to a diffusion electrode alkaline making device which mainly comprises the positive electrode of an ionic membrane electrolyser and the negative electrode of the ionic membrane electrolyser, wherein one or more gas chambers and one or more liquid chambers are arranged at one side of the negative electrode of the ionic membrane electrolyser, oxygen is delivered towards the gas chambers, an oxygen cathode diffusion electrode is arranged between the gas chambers and the liquid chambers, and oxygen and H2O are converted into OH- for entering the catholyte chambers and producing NaOH in the catholyte chambers under the action of the oxygen cathode diffusion electrode; and simultaneously, no H2 is separated out from the negative electrode of the ionic membrane electrolyser. For the negative electrode of the alkaline making device, due to the existence of chemical reaction that 2H2O plus 1/2O2 plus 2e equal to 2OH-, the decomposition voltage is reduced by 1.22V, and electricity can be saved by more than 56 percent according to estimation of standard potential.
Description
Technical field
The utility model relates to a kind of system alkali device, especially relates to a kind of system alkali device that uses the oxygen cathode diffusion electrode.
Background technology
Chlorine industry is produced caustic soda and chlorine by electrolytic saltwater, and by-product hydrogen is the basic chemical industry primary industry that occupies critical role in national economy simultaneously.Present domestic system alkali has diaphragm process and ionic membrane method, and power consumption cost accounts for 60% in the production cost, says in a sense, and reducing power consumption is the deciding factor that improves the chlor-alkali industry economic benefit.
Specifically, chlor-alkali plant is produced 1 ton of caustic soda, and the hydrogen of 0.886 ton of chlorine of by-product and more than 1200 cubic metre need consume 2500 electric degrees approximately, is the electricity-eating tiger in the chemical industry, and will eat up 20% of chemical industry electricity consumption every year.For many years, people once by improving barrier film, improved electric groove structure, transform graphite anode as metal anode.Adopt the quadruple effect evaporation technology, and improve approach such as production management level and make total energy consumption descend 30%.But fundamentally, the huge current consumption of chlorine industry is determined by its chemical reaction itself.This just tells us will realize the energy-conservation significantly of chlorine industry, must change its electrochemical reaction, thereby reduce its theoretical decomposition voltage, reaches purpose of saving.As everyone knows, the main electrochemical reaction of chlor-alkali production is at present:
2NaCl+2H
2O＝2NaOH+H
2↑+Cl
2↑
At anode: 2Cl
--2e=Cl
2Φ ° of Cl
2/ Cl
-=1.359 volts
At negative electrode: 2H
2O+2e=H
2↑+2OH
-Φ ° of H
2O/OH
-=-0.828 volt
So, its theoretical decomposition voltage: E °=Φ ° sun-Φ ° the moon
E °=1.359 volts-(0.828 volt)=2.187 volts
If the total reaction of electrode process is changed into:
2NaCl+H
2O+1/2O
2＝2NaOH+Cl
2↑
At anode: 2Cl
--2e=Cl
2↑ Φ ° of Cl
2/ Cl
-=1.359 volts
At negative electrode: 2H
2O+1/2O
2+ 2e=2OH
-Φ ° of H
2O/OH
-=0.391 volt
So, its theoretical decomposition voltage: V=Φ ° sun-Φ ° the moon
-0.391 volt=0.968 volt of V=1.359 volt
Find out that from above-mentioned two kinds of electrode processes their anodic process does not become, negative electrode is decomposed into hydrogen and hydroxide radical by original water under the electric energy effect, changes into water and airborne oxygen effect and generates hydroxide radical, makes it no longer produce hydrogen.Obviously, improved electrode process has only just reduced by 1.22 volts by one of theoretical decomposition voltage.By the standard potential estimation, can economize on electricity 56%.
But, also do not have to occur the good diffusion electrode system alkali device that above-mentioned theory is directly applied to actual production in the prior art.
Summary of the invention
The utility model has designed a kind of diffusion electrode system alkali device, and it is excessive that the technical problem of its solution is that domestic system alkali has diaphragm process and ionic membrane method to expend power supply, do not meet the requirement of current low-carbon environment-friendly.
In order to solve the technical problem of above-mentioned existence, the utility model has adopted following scheme:
A kind of diffusion electrode system alkali device, mainly comprise the anode of ion-exchange membrane electrolyzer and the negative electrode of ion-exchange membrane electrolyzer, negative electrode one side at described ion-exchange membrane electrolyzer is provided with one or more air chambers and one or more liquid chamber, to described air chamber delivering oxygen, be provided with the oxygen cathode diffusion electrode between described air chamber and the described liquid chamber, described oxygen is following and H by the effect of described oxygen cathode diffusion electrode
2O changes OH together into
-Enter catholyte compartment, thereby generate NaOH at described catholyte compartment, the negative electrode at described ion-exchange membrane electrolyzer does not have H simultaneously
2Separate out.
Further, described air chamber mainly is made up of described oxygen cathode diffusion electrode, lath and gusset, and described lath and described gusset are fixedly connected on the cathode disc.
Further, constitute described liquid chamber by the negative electrode pad between described cathode diffusion electrode and the ionic membrane.
Further, oxygen enters adapter and is installed in the top of electrolyzer as oxygen inlet tube, and described oxygen enters and is distributed with many apertures in the adapter, and oxygen is evenly distributed to one or more air chambers by the aperture that described oxygen enters adapter.
Further, oxygen flows out takes over the bottom that is installed in electrolyzer, and remaining oxygen flows out to take over by described oxygen and flows out one or more air chambers.
The buffering net and the spacer screen of support and electric action further, have been set between described oxygen cathode diffusion electrode and the described air chamber.
Further, described buffering net is formed by nickel wire establishment back rolling, and spots weld on the described spacer screen.
Further, described spacer screen is drawn by the nickel plate and forms, and spots weld behind the flanging all around on the described air chamber framework.
Further, described cathode diffusion electrode is fixed on the described cathode disc by resin tower glue, and resin tower glue plays sealing function, and described air chamber and described liquid chamber are separated.
Further, the oxygen purity of carrying to described air chamber is at least more than 94%.
This diffusion electrode system alkali device is compared with tradition system alkali device, has following beneficial effect: the negative electrode of the system alkali device in the utility model is owing to exist 2H
2O+1/2O
2+ 2e=2OH
-Chemical reaction, thereby make decomposition voltage just reduce by 1.22 volts, by the standard potential estimation, can economize on electricity more than 56%.
Description of drawings
Fig. 1 is the main TV structure figure of the utility model diffusion electrode system alkali device;
Fig. 2 is that bowing of the utility model diffusion electrode system alkali device cutd open figure;
Fig. 3 is the sectional side elevation of the utility model diffusion electrode system alkali device;
Fig. 4 is the structural representation of the single air chamber of the utility model diffusion electrode system alkali device;
Fig. 5 is the reinforcing plate structure synoptic diagram of the utility model diffusion electrode system alkali device.
Description of reference numerals:
The 1-air chamber; The 2-liquid chamber; The 3-lath; The 4-gusset; The 5-spacer screen; 6-cushions net; 7-oxygen cathode diffusion electrode; 8-oxygen enters adapter; 9-oxygen flows out to be taken over; The 10-ionic membrane; 11-negative electrode pad; The 12-cathode disc.
Embodiment
Below in conjunction with Fig. 1 to Fig. 5, the utility model is described further:
A kind of diffusion electrode system alkali device, mainly comprise the anode of ion-exchange membrane electrolyzer and the negative electrode of ion-exchange membrane electrolyzer, negative electrode one side at ion-exchange membrane electrolyzer is provided with one or more air chambers 1 and one or more liquid chamber 2, to air chamber 1 delivering oxygen, the oxygen purity of carrying to described air chamber 1 is at least more than 94%.Be provided with oxygen cathode diffusion electrode 7 between air chamber 1 and the liquid chamber 2, oxygen acts on down and H by oxygen cathode diffusion electrode 7
2O changes OH together into
- Enter catholyte compartment 2, thereby generate NaOH at catholyte compartment 2, the negative electrode at ion-exchange membrane electrolyzer does not have H simultaneously
2Separate out.
The total reaction of this electrode process is changed into:
2NaCl+H
2O+1/2O
2＝2NaOH+Cl
2↑
At anode: 2Cl
--2e=Cl
2↑ Ф ° of Cl
2/ Cl
-=1.359 volts
At negative electrode: 2H
2O+1/2O
2+ 2e=2OH
-Φ ° of H
2O/OH
-=0.391 volt
So, its theoretical decomposition voltage: V=Φ ° of positive Φ ° the moon
-0.391 volt=0.968 volt of V=1.359 volt
Therefore, only 1.22 volts have just been reduced by one of theoretical decomposition voltage.By the standard potential estimation, can economize on electricity 56%.
Constitute liquid chamber 2 by negative electrode pad 11 between cathode diffusion electrode 7 and the ionic membrane 10.The buffering net 6 and the spacer screen 5 of support and electric action have been set between oxygen cathode diffusion electrode 7 and the air chamber 1.Buffering net 6 is formed by nickel wire establishment back rolling, and spots weld on the spacer screen 5.Spacer screen 5 is drawn by the nickel plate and forms, and spots weld behind the flanging all around on air chamber 1 framework.The characteristics of oxygen cathode diffusion electrode 7 are not produce hydrogen on negative electrode, and oxygen changes hydroxide ion into by oxygen cathode diffusion electrode 7 and enters catholyte compartment 2, thereby generate caustic soda at catholyte compartment 2, greatly reduce bath voltage.
Oxygen enters adapter 8 by oxygen and oxygen flows out adapter 9 turnover air chambers 1.Oxygen enters to be taken over 8 and is installed in the top of electrolyzer as oxygen inlet tube, and oxygen enters to take on 8 and is distributed with many apertures, and oxygen enters by oxygen and takes over 8 aperture and be evenly distributed to one or more air chambers 1.Oxygen flows out the bottom that adapter 9 is installed in electrolyzer, and remaining oxygen flows out by oxygen takes over the one or more air chambers 1 of 9 outflows.The material that oxygen enters adapter 8 and oxygen outflow adapter 9 is SUS310S.
In conjunction with the accompanying drawings the utility model has been carried out exemplary description above; obvious realization of the present utility model is not subjected to the restriction of aforesaid way; as long as the various improvement of having adopted method design of the present utility model and technical scheme to carry out; or design of the present utility model and technical scheme are directly applied to other occasion without improving, all in protection domain of the present utility model.
Claims (10)
1. diffusion electrode system alkali device, mainly comprise the anode of ion-exchange membrane electrolyzer and the negative electrode of ion-exchange membrane electrolyzer, it is characterized in that: negative electrode one side at described ion-exchange membrane electrolyzer is provided with one or more air chambers (1) and one or more liquid chamber (2), to described air chamber (1) delivering oxygen, be provided with oxygen cathode diffusion electrode (7) between described air chamber (1) and the described liquid chamber (2), described oxygen acts on down and H by described oxygen cathode diffusion electrode (7)
2O changes OH together into
-Enter catholyte compartment (2), thereby generate NaOH at described catholyte compartment (2), the negative electrode at described ion-exchange membrane electrolyzer does not have H simultaneously
2Separate out.
2. according to the described diffusion electrode system alkali of claim 1 device, it is characterized in that: described air chamber (1) mainly is made up of described oxygen cathode diffusion electrode (7), lath (3) and gusset (4), and described lath (3) and described gusset (4) are fixedly connected on the cathode disc (12).
3. according to the described diffusion electrode system alkali of claim 2 device, it is characterized in that: constitute described liquid chamber (2) by negative electrode pad (11) between described cathode diffusion electrode (7) and the ionic membrane (10).
4. according to claim 1,2 or 3 described diffusion electrode system alkali devices, it is characterized in that: oxygen enters adapter (8) is installed in electrolyzer as oxygen inlet tube top, described oxygen enters in the adapter (8) and is distributed with many apertures, and oxygen is evenly distributed to one or more air chambers (1) by the aperture that described oxygen enters adapter (8).
5. according to the described diffusion electrode system alkali of claim 4 device, it is characterized in that: oxygen flows out takes over the bottom that (9) are installed in electrolyzer, and remaining oxygen flows out adapter (9) by described oxygen and flows out one or more air chambers (1).
6. according to the described diffusion electrode system alkali of claim 5 device, it is characterized in that: buffering net (6) and spacer screen (5) that support and electric action have been set between described oxygen cathode diffusion electrode (7) and the described air chamber (1).
7. according to the described diffusion electrode system alkali of claim 6 device, it is characterized in that: described buffering net (6) is formed by nickel wire establishment back rolling, and spots weld on the described spacer screen (5).
8. according to the described diffusion electrode system alkali of claim 7 device, it is characterized in that: described spacer screen (5) is drawn by the nickel plate and forms, and spots weld behind the flanging all around on described air chamber (1) framework.
9. according to any one described diffusion electrode system alkali device in the claim 1 to 3,5 to 8, it is characterized in that: described cathode diffusion electrode (7) is fixed on the described cathode disc (12) by resin tower glue, resin tower glue plays sealing function, and described air chamber (1) and described liquid chamber (2) are separated.
10. according to any one described diffusion electrode system alkali device in the claim 1 to 3,5 to 8, it is characterized in that: the oxygen purity of carrying to described air chamber (1) is at least more than 94%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020698711.8U CN201942756U (en) | 2010-12-28 | 2010-12-28 | Diffusion electrode alkaline making device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020698711.8U CN201942756U (en) | 2010-12-28 | 2010-12-28 | Diffusion electrode alkaline making device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201942756U true CN201942756U (en) | 2011-08-24 |
Family
ID=44470104
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201020698711.8U Expired - Lifetime CN201942756U (en) | 2010-12-28 | 2010-12-28 | Diffusion electrode alkaline making device |
Country Status (1)
| Country | Link |
|---|---|
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102031535A (en) * | 2010-12-28 | 2011-04-27 | 蓝星(北京)化工机械有限公司 | Diffusion electrode alkali producing device |
| EP3054034A1 (en) | 2015-02-06 | 2016-08-10 | Ginkgo Investments Limited | Amine-containing electrolyte for electrochemical devices |
-
2010
- 2010-12-28 CN CN201020698711.8U patent/CN201942756U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102031535A (en) * | 2010-12-28 | 2011-04-27 | 蓝星(北京)化工机械有限公司 | Diffusion electrode alkali producing device |
| EP3054034A1 (en) | 2015-02-06 | 2016-08-10 | Ginkgo Investments Limited | Amine-containing electrolyte for electrochemical devices |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110824 |
|
| CX01 | Expiry of patent term |