KR20160051234A - seawater electrolyer not using acid cleaning - Google Patents
seawater electrolyer not using acid cleaning Download PDFInfo
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- KR20160051234A KR20160051234A KR1020140150828A KR20140150828A KR20160051234A KR 20160051234 A KR20160051234 A KR 20160051234A KR 1020140150828 A KR1020140150828 A KR 1020140150828A KR 20140150828 A KR20140150828 A KR 20140150828A KR 20160051234 A KR20160051234 A KR 20160051234A
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Abstract
Description
우리나라 화력발전 및 원자력발전소에서는 대부분 해수를 복수기의 냉각수로 사용하고 있다. Most thermal power plants and nuclear power plants in Korea use seawater as cooling water for condensers.
복수기의 냉각수로 사용하는 해수에 서식하고 있는 해양생물인 담치류 및 해조류는 해수 취수구나 복수기내부에 부착하여 유로 저항증가, 유량감소 및 전열면의 열전달을 방해하여 열교환기의 효율을 저하시키거나, 부식을 촉진하는등의 많은 문제를 발생시킨다.The marine organisms such as mussels and seaweed, which are inhabited in the seawater used as the cooling water of the condenser, are attached to the seawater inlet or the condenser to reduce the efficiency of the heat exchanger by interfering with the flow resistance increase, And promotes corrosion.
따라서, 발전소에서는 해수 냉각수계통에 해양생물의 부착을 방지하기 위해서 해수를 전기분해하여 차아염소산소다(NaOCl)를 생산하는 해수전해설비를 사용한다. Therefore, the power plant uses seawater electrolysis equipment to produce seawater sodium hypochlorite (NaOCl) by electrolyzing seawater to prevent marine life from attaching to the seawater coolant system.
차아염소산소다는 강한 살충및 살균력을 가지고 있는 물질로서 약간의 주입으로도 해수 냉각계통에 해양생물의 부착을 방지하는데 매우 우수한 효과를 나타낸다.Sodium hypochlorite is a powerful insecticide and germicidal material and has a very good effect in preventing the attachment of marine life to the seawater cooling system even with a slight injection.
해수 전해설비에서 해수 전기분해 화학적 반응은 Anode(+극)에서 염소(Cl2)가 발생하고 Cathode(-극)에서는 수산화마그네슘[Mg(OH)2]과 수산화나트륨(NaOH)을 생성시키는데 이중 수산화나트륨이 염소와 반응하여 차아염소산소다(NaOCl)를 생산하고, 불용성인 수산화마그네슘은 cathode에 부착하여 전해효율 저하, 전극파손등의 여러가지 문제점을 발생시키므로 주기적으로 산세정을 실시하여 제거하고 있다.The seawater electrolytic chemical reaction in seawater electrolytic facilities generates chlorine (Cl 2 ) at the anode (+ pole) and magnesium hydroxide [Mg (OH) 2 ] and sodium hydroxide (NaOH) at the cathode Sodium is reacted with chlorine to produce sodium hypochlorite (NaOCl), and insoluble magnesium hydroxide is adhered to the cathode to cause various problems such as deterioration of electrolytic efficiency and electrode breakage, so it is periodically removed by acid cleaning.
따라서, 본 발명은 해수전기분해 설비 cathode에 부착한 수산화마그네슘을 전극의 극성을 변환하여 제거하는 산세정이 불필요한 해수전해조의 구조에 관한 발명이다.
Accordingly, the present invention relates to a structure of a seawater electrolytic cell in which magnesium hydroxide attached to a cathode of a seawater electrolysis facility is not required to remove acid by converting the polarity of the electrode.
본 발명은 산세정을 하지 않는 절전형 해수전해설비 구조에 관한 것으로 해수전해설비의 구조에서 문제점은 해수전해설비를 운전하면 음극(cathode)에서 부반응으로 다음식(5)와 같이 부도체인 수산화마그네슘[Mg(OH)2]이 부착되어 해수의 흐름을 방해, 해수전해설비의 효율저하, 전극(electrode)의 수명을 단축 및 합선에 의한 전극 파손등의 사고가 발생한다 The present invention relates to a power-saving type sea water electrolytic unit structure that does not perform acid cleaning, and a problem in the structure of a sea water electrolytic unit is that when a seawater electrolytic unit is operated, a magnesium hydroxide [Mg (OH) 2 ] is adhered to the surface of the water to interfere with the flow of the seawater, the efficiency of the seawater electrolytic facility is reduced, the life of the electrode is shortened, and the electrode breakage due to the short circuit occurs
Anode 주반응 Anode main reaction
2Cl- Cl2 + 2e- --------------------(1) 2Cl - Cl 2 + 2e - (1)
Cathode 주반응Cathode main reaction
2Na+ + 2e- 2Na -------------------(2) 2H2O + 2Na 2NaOH + H2 -----------(3) 2Na + + 2e - 2Na 2H 2 O + 2Na 2 NaOH + H 2 ----------- (3) )
종합반응Total reaction
Cl2 + 2NaOH NaOCl + NaCl + H2O -----(4) Cl 2 + 2 NaOH NaOCl + NaCl + H 2 O ----- (4)
Cathode 부반응 Cathode side reaction
2NaOH + MgCl2 Mg(OH)2+ NaCl-----(5) 2NaOH + MgCl 2 Mg (OH) 2 + NaCl ----- (5)
따라서, 기존의 해수전해설비는 수산화마그네슘등의 cathode 전극의 부착물을 제거하기 위하여 산세정을 주기적으로 실시한다.Therefore, in the conventional seawater electrolytic apparatus, acid cleaning is periodically performed to remove deposits of a cathode such as magnesium hydroxide.
산세정을 주기적으로 자주 실시하면 anode표면에 coating된 백금족화합물을 손상시키고, 전극의 수명단축되며 전해효율이 저하되고, 운전유지비가 증가한다. Periodic frequent acid cleaning will damage the platinum group compounds coated on the anode surface, shortening the lifetime of the electrode, lowering the electrolytic efficiency and increasing the operation maintenance cost.
기존의 발전소에서 사용하는 해수전해설비의 양극(anode)은 티탄판에 루테늄, 로듐, 파라듐, 오스뮴, 이리듐, 백금등의 백금족화합물들을 혼합하여 coating 열처리하여 사용하고 있으며, 음극(cathode)은 hastelloy C-276, 티탄판 및 SUS L316등의 합금강을 사용하고 있다. The anode of the seawater electrolytic facility used in the existing power plant is made by mixing the titanium plate with platinum group compounds such as ruthenium, rhodium, palladium, osmium, iridium, platinum and coating heat treatment. The cathode is used as Hastelloy C-276, titanium plate, and SUS L316.
기존의 특허(등록NO.10-0663332)에서는 anode와 cathode을 모두 티탄판을 사용한 선박 밸러스트수 전해살균시스템에서 anode 와 cathode을 일정한 주기로 극성을 변환시켜 수산화마그네슘의 부착을 해결하였다.
In the existing patent (Registration No. 10-0663332), in the ballast water electrolytic sterilization system using the titanium plate for both the anode and the cathode, the polarity of the anode and the cathode was changed at regular intervals to solve the adhesion of magnesium hydroxide.
본발명은 산세정을 하지않는 절전형 해수전해조 구조에 관한 기술로서 해수전해조의 전기분해 효율을 높게 하기 위하여 anode은 티탄판에 백금족 금속화합물을 혼합한 용액을 coating후 열처리를 한 전극을 사용하고, cathde은 해수 및 수소취화에 강한 hastelloy C-276 또는 SUS L316판을 전극으로 사용하는 전해조에서 음극에 부착한 수산화마그네슘을 산세정을 하지 않고 제거하는 기술의 발명이다.The present invention relates to a power-saving type seawater electrolytic cell structure which does not perform acid pickling. In order to increase the electrolysis efficiency of an electrolytic cell, an anode is coated with a solution of a mixture of a platinum group metal compound and a titanium plate, Is an invention of a technique for removing magnesium hydroxide adhering to a negative electrode without acid washing in an electrolytic cell using a Hastelloy C-276 or SUS L316 plate resistant to seawater and hydrogen embrittlement as an electrode.
기존의 특허(등록NO.10-0663332) 방법에 따라 전극의 극성을 변환하여 운전시 anode가 백금족 금속으로 coating된 전극인 경우 anode 전극를 cathode 전극으로 극성을 변화시키면, 극성이 변환된 전극(cathode)에서 환원반응이 일어나 수소가 발생하고 티탄판에 coating된 백금족 금속산화물이 탈리되어 anode 전극의 수명이 단축된다. When the polarity of the electrode is changed according to the existing patent (Registration No. 10-0663332) and the anode is coated with the platinum group metal during operation, when the anode electrode is changed to the cathode electrode, The reduction reaction occurs, hydrogen is generated, and the platinum group metal oxide coated on the titanium plate is removed, shortening the life of the anode electrode.
따라서, 본 발명은 anode는 티탄판에 백금족 금속산화물이 coating된 전극을 사용하고, cathode는 hastelloy C-276 또는 SUS L316판을 전극으로 사용하는 경우 anode전극에서 백금족 금속산화물의 탈리를 방지하면서, 산세정을 실시하지 않아도 수산화마그네슘이 부착하는 문제를 해결하는 발명이다. Accordingly, in the present invention, when an anode is coated with a platinum group metal oxide on a titanium plate and a cathode is used as an electrode on hastelloy C-276 or SUS L316 plate, This invention solves the problem that magnesium hydroxide adheres even without washing.
본 발명은 해수전해조에서 염소가스를 발생시키는 anode전극은 염소과전압을 낮추어 전해효율를 향상시키기 위하여 티탄판에 백금족 금속산화물이 coating된 전극이며, cathode는 hastelloy C-276 또는 SUS L316판 전극을 사용하는 해수전해조에서 산세정을 하지 않고 연속 운전하기 위하여 그림 1과 같이 cathode 전극을 2개조로 분리하여 제작하고, 정류기에서 각 조별로 전기를 공급할수 있도록 제어장치를 부착한다.In the present invention, an anode electrode for generating chlorine gas in a seawater electrolytic cell is an electrode in which a platinum group metal oxide is coated on a titanium plate to improve electrolytic efficiency by lowering chlorine overvoltage, and the cathode is a sea water electrode using hastelloy C-276 or SUS L316 plate electrode In order to operate continuously without washing the acid in the electrolytic cell, the cathode electrode is separated into two groups as shown in Fig. 1, and a control unit is attached so that electricity can be supplied to each group in the rectifier.
해수를 전기분해하여 차아염소산소다를 생산하는 해수전해조에 있어서 cathode전극에 수산화마그네슘의 부착을 방지할수 있어 기존의 해수전해조에서 실시하던 산세정을 하지 않으므로서 경제적 절약과 환경오염을 방지하는 효과가 있다.In the seawater electrolytic cell producing sodium hypochlorite by electrolysis of seawater, magnesium hydroxide can be prevented from adhering to the cathode electrode, and it is effective to prevent economical saving and environmental pollution because it does not carry out acid cleaning which was performed in the existing seawater electrolytic cell .
또한, 해수전해조의 cathode 젼극에 수산화마그네슘의 부착방지를 하기위하여 기존에 개발된 운전방법인 anode 전극과 cathode 전극을 모두 티탄판을 사용하고 단순히 극성을 변환하여 운전시 cathode의 수산화 마그네슘의 부착은 방지할수 있으나, 이 기존방법은 전해효율이 매우 낮아 화력발전소와 같이 많은 량의 차아염소산소다를 필요로 하는 곳에는 사용할수 없으며, 전해효율을 높이기 위하여 anode전극을 티탄판에 백금족금속 산화물을 coating한 전극을 사용하고. cathode전극의 구조를 변경하여, 전극의 극성을 변환하여 수산화마그네슘을 제거해도 anode전극에 coating된 백금족산화물의 탈리현상이 발생하지 않는 해수전해조의 발명이다. In addition, in order to prevent the adhesion of magnesium hydroxide to the cathode electrode of the seawater electrolyzer, both the anode electrode and the cathode electrode, which have been conventionally developed, use a titanium plate and simply convert the polarity to prevent adhesion of magnesium hydroxide However, this conventional method has a very low electrolytic efficiency and can not be used in a place where a large amount of sodium hypochlorite is required as in the case of a thermal power plant. In order to increase the electrolysis efficiency, an anode electrode is formed on a titanium plate coated with a platinum group metal oxide Use. it is an invention of a seawater electrolytic cell in which the structure of the cathode electrode is changed so that the separation of the platinum group oxide coated on the anode electrode does not occur even if the magnesium hydroxide is removed by changing the polarity of the electrode.
[도 1]은 해수전해조의 일반적인 도면이다.
[도 2]는 cathode 전극에 부착된 수산화마그네슘을 탈리시키는 공정 도면이다.
[도 3]은 cathod e전극에 부착된 수산화마그네슘을 탈리시키는 공정 도면이다. [Figure 1] is a general view of a seawater electrolyzer.
[Fig. 2] is a process drawing for desorbing magnesium hydroxide adhered to a cathode electrode.
[Fig. 3] is a process drawing for desorbing magnesium hydroxide adhered to the cathode electrode.
본발명에서는 해수전해조의 전극을 anode는 1개 모듈, cathode는 2개모듈의 총 3개모듈로 구성된 전극을 사용하여 운전중에 수산화마그네슘을 제거하기 위한 산세정을 하지않는 해수전해조의 구조와 운전방법에 관한 것이다.
In the present invention, the structure and operation method of a sea water electrolytic cell which does not carry out pickling to remove magnesium hydroxide during operation by using an electrode composed of three modules including an anode module of one module and a cathode module of two modules .
[실시예 1][Example 1]
[그림 1]에서 해수전해조 anode전극Ａ는 1개조로 제작하고 정류기ⓔ에서 전기선 ①를 통하여 + 전기를 공급 또는 차단할수 있는 제어장치를 부착하고, cathode는 [그림1]의 전극Ｂ, 전극Ｃ와 같이 2개조로 제작하여, 정류기ⓔ에서 ②, ③의 2개의 전기선에 －전기를 동시에 공급하거나 ②전기선에 ＋전기, ③전기선에 －전기 또는 ②전기선에 －전기, ③전기선에 ＋전기를 공급하도록 제어장치를 부착한다.
In Figure 1, the anode electrode A of the seawater electrolytic cell is manufactured in a single unit, and a control device which can supply or shut off + electricity is attached through the electric wire ① in the rectifier, and the cathode is connected to the electrodes B and C ② to supply electricity to two electric wires of ② and ③ at rectifier ⓔ or ② to supply + electricity to electric wire, ③ to electric wire or electricity to ② electric wire, and to electric wire to ③ electric wire Attach the control unit.
[실시예 2][Example 2]
차아염소산소다를 생산하기 위한 운전방법은 [그림 1]에서 전극Ａ를 anode 전극으로 하고, 전극 Ｂ,Ｃ를 Cathode 전극으로 하는 운전방법이다.
In order to produce sodium hypochlorite, the operation method is as shown in Fig. 1, where electrode A is the anode electrode and electrodes B and C are the cathode electrodes.
[실시예 3][Example 3]
차아염소산소다를 생산하기 위한 [실시예 2]방법으로 장기간 운전하면 [그림 1]에서 전극Ａ와 전극Ｂ,Ｃ사이의 전압계ⓥ의 전압은 상승한다.
When the apparatus is operated for a long time by the method of [Embodiment 2] for producing sodium hypochlorite, the voltage of the voltmeter between the electrode A and the electrodes B and C rises.
[실시예 4][Example 4]
예를 들어 전극Ａ와 전극Ｂ,Ｃ사이의 전압계ⓥ의 최고전압을 4V로 설정하고 운전하여 전압이 4V에 도달하면 [그림 2]와 같이 자동으로 정류기ⓔ의 ①전선의 전원을 차단시키는 제어장치를 부착하여 전기를 차단하고 ②전선에 ＋전기를 공급하고 ③전기선에 －전기를 공급하도록 제어장치를 부착하여 운전하면 Ｂ전극에 부착된 수산화마그네슘은 탈리된다.
For example, when the maximum voltage of the voltmeter between the electrode A and the electrodes B and C is set to 4 V and the voltage reaches 4 V, the controller 1 automatically turns off the power of the rectifier ⓔ as shown in [Figure 2] , The electricity is shut off, ② the electricity is supplied to the electric wire, and ③ the controller is attached to the electric wire so that the magnesium hydroxide attached to the B electrode is removed.
[실시예 5][Example 5]
[그림 3]과 같이 정류기ⓔ의 ①전선의 전원을 차단시키고 ②전선에 －전기를 공급하고 ③ 전기선에 ＋전기를 공급하도록 제어장치를 부착하여 운전하면 Ｃ전극에 부착된 수산화 마그네슘은 탈리된다.
As shown in [Figure 3], when the controller of the rectifier ⓔ is disconnected from the power supply, ② the electricity is supplied to the wire, and the controller is installed to supply electricity to the electricity line, the magnesium hydroxide attached to the C electrode is desorbed.
ⓐ Place Cell Box
ⓑ Distributor Bar
ⓒ O-Ring/small
ⓓ Plastic Retainer Strip ⓔ Rectifier ⓗ Spacer Strip
ⓙSpacer Button
ⓚ Anode
ⓛ Cathode
ⓜ Spacer Ring
ⓝ Retainer Bar
ⓞ Titanium Nut
ⓟ Large O-Ring
ⓠAcrylic Cover ⓡWasher
ⓢ Cover Bolt ⓣ Nut
ⓤ 3 Brass Nut
ⓥVoltmeter ⓦH-frameBraceⒶ Place Cell Box ⓑ Distributor Bar ⓒ O-Ring / small
Ⓓ Plastic Retainer Strip ⓔ Rectifier ⓗ Spacer Strip
ⒿSpacer Button ⓚ Anode ⓛ Cathode
Ⓜ Spacer Ring ⓝ Retainer Bar ⓞ Titanium Nut
Ⓟ Large O-Ring ⓠAcrylic Cover ⓡWasher
Ⓢ Cover Bolt ⓣ Nut ⓤ 3 Brass Nut
ⓋVoltmeter H-frameBrace
Claims (5)
anode 전극은 티탄판에 백금족금속을 coating한 전극이며, cathode전극은 hastelloy C-276 SUS L316 또는 티탄판으로 제작된 해수전해조이다. In claim 1
The anode electrode is a titanium plate coated with a platinum group metal and the cathode electrode is a hastelloy C-276 SUS L316 or a titanium plate.
해수전해조의 Cathode전극을 짝수번호 전극과 홀수번호 전극으로 2개 module로 구분하여 제작하여 전기를 각각의 모듈에 공급할수 있는 제어장치가 부착된 해수전해조이다.In claim 1
It is a seawater electrolytic cell equipped with a control device that can divide the cathode electrode of the seawater electrolytic cell into two modules with an even number electrode and an odd number electrode and supply electricity to each module.
해수전해조 cathode 전극에 부착된 수산화마그네슘을 제거하기 위한 운전방법은 2개조로 분리하여 전원을 공급하도록 제작된 cathode 전극을 단독으로 전기분해조가 구성되도록 전원을 ,전기를 공급하여 cathode전극을 , 극성을 변환 운전하여 cathode에 부착된 수산화마그네슘을 제거하는 운전방법이다. In claim 3
The operation method for removing magnesium hydroxide adhered to the cathode of the seawater electrolytic cell is as follows. A cathode electrode, which is separated and supplied with power, And the magnesium hydroxide attached to the cathode is removed by a conversion operation.
정류기ⓔ에서 anode전극과 cathode에 전압측정기를 부착하여 전해조의 전압이 setting 값에 도달하면 자동으로 차아염소산소다 생산 모드에서 cathode에 부착된 수산화마그네슘을 제거하는 모드로 전환하는 시스템으로 제작된 해수전해조이다.
In claim 4
When the voltage of the electrolyzer reaches the set value by attaching the voltage measuring device to the anode electrode and the cathode at the rectifier, the seawater electrolyzer converts the mode to the mode of removing the magnesium hydroxide attached to the cathode in the sodium hypochlorite production mode automatically .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020140150828A KR20160051234A (en) | 2014-11-03 | 2014-11-03 | seawater electrolyer not using acid cleaning |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020140150828A KR20160051234A (en) | 2014-11-03 | 2014-11-03 | seawater electrolyer not using acid cleaning |
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| Publication Number | Publication Date |
|---|---|
| KR20160051234A true KR20160051234A (en) | 2016-05-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1020140150828A KR20160051234A (en) | 2014-11-03 | 2014-11-03 | seawater electrolyer not using acid cleaning |
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| Country | Link |
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| KR (1) | KR20160051234A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106011918A (en) * | 2016-07-11 | 2016-10-12 | 青岛双瑞海洋环境工程股份有限公司 | Seawater-electrolysis chlorine producing electrolytic bath used for resisting manganese pollution |
| KR20190073676A (en) * | 2017-12-19 | 2019-06-27 | 인천대학교 산학협력단 | Seawater splitting electrode, Method for manufacturing the same, and seawater splitting apparatus |
-
2014
- 2014-11-03 KR KR1020140150828A patent/KR20160051234A/en not_active Application Discontinuation
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106011918A (en) * | 2016-07-11 | 2016-10-12 | 青岛双瑞海洋环境工程股份有限公司 | Seawater-electrolysis chlorine producing electrolytic bath used for resisting manganese pollution |
| KR20190073676A (en) * | 2017-12-19 | 2019-06-27 | 인천대학교 산학협력단 | Seawater splitting electrode, Method for manufacturing the same, and seawater splitting apparatus |
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