電解槽極化條件下的運(yùn)行-中英對照

電解槽在停車極化條件下的繼續(xù)運(yùn)行
在電解槽的初次吹掃和沖洗完成后，電解槽停車跳閘后大約30 分鐘，在接近于正常的工作溫度條件下，繼續(xù)對電解槽進(jìn)料，以防重新啟動(dòng)電解槽。電解槽的停車條件，參閱前一章節(jié)內(nèi)容。如果電解槽的停車操作導(dǎo)致長時(shí)間脫機(jī) （大于6小時(shí)）或者準(zhǔn)備進(jìn)行維修，裝置必須進(jìn)行冷卻處理準(zhǔn)備排水。
3.2.6.1停車后的進(jìn)料
當(dāng)電解槽停車后，滲透作用會(huì)導(dǎo)致水發(fā)生凈調(diào)動(dòng)，從陽極室轉(zhuǎn)移到陰極室。這樣，如果陽極室沒有引如新鮮鹽水，鹽水濃度增加到鹽析條件，鹽水水位在室內(nèi)下降，大約每個(gè)小時(shí)暴露離子膜頂部1厘米。滲透水穿過離子膜后侵蝕強(qiáng)度也隨之降低。在達(dá)到表格3.2里規(guī)定的下限之前，必須采取措施強(qiáng)化侵蝕力。
因此，在停車和極化期間，應(yīng)該繼續(xù)保持對電解槽的進(jìn)料，流速控制在3 kA/m，相當(dāng)于正常的操作的比率（以防重新開車）。這樣有助于保持陽極液室處于淹沒狀態(tài)，以及使陽極液和陰極液的濃度變化減到最小。
鹽水的流失只能允許一小段時(shí)間（一到兩個(gè)小時(shí)）。流體必須儲(chǔ)存，保證不發(fā)生鹽析狀況，液位的水平不下降將離子膜頂部暴露在氣體中。允許較長時(shí)間的堿液流失現(xiàn)象 （12個(gè)小時(shí)），在電解槽允許的下限。鹽水和堿液泵送系統(tǒng)必須具有足夠的可靠性，確保不違反上述條件。
3.2.6.2溫度控制    
如果在迅速重新開車時(shí)，電解槽的液體溫度沒有到達(dá)要求，可允許冷卻，但是溫度不得低于55 C。不過，極化條件下的溫度不得低于75C（如果陽極液室里有氯氣或者次氯酸鹽成分時(shí)，操作必須繼續(xù)進(jìn)行）�？梢酝ㄟ^加熱器/冷卻器，將鹽水和堿液控制在合適的溫度，。
3.2.7 電解槽冷卻和排水
如果在延長期內(nèi)進(jìn)行停車，或者，如果如果電解槽要求進(jìn)行維護(hù)，必須進(jìn)行冷卻和排水。即使只有一個(gè)單元槽進(jìn)行拆卸，整個(gè)電解槽必須排干里面的水。
電解槽必須在低于45 C的條件下進(jìn)行冷卻，防止在排水進(jìn)行之前，離子膜受到損害。為了使操作時(shí)間減小到最少，必須安裝冷卻鹽水和堿液原料供應(yīng)的設(shè)備。
在冷卻期間，一旦溫度低于75 C，必須關(guān)閉極化整流器，繼續(xù)提供冷卻鹽水和堿液給電解槽，控制輸出溫度不低于45 C。在強(qiáng)制冷卻和除污期間，鹽水和堿液必須在足夠在可接受時(shí)間內(nèi)，按照規(guī)定流體速率提供到電解槽。最小流速是：
-鹽水0.16 m3/hr每個(gè)單元槽
-堿液0.22 m3/hr每個(gè)單元槽
一旦除污流程完成 （以氣體測試確認(rèn)） 單元槽輸入排空吹掃氣體，確保沒有出現(xiàn)真空情況和過大的壓差。
隨后，立即關(guān)閉吹掃氣體，防止暴露在外的離子膜變干。同時(shí)完成電解槽的隔離。 在隔離條件下，在電解槽的兩側(cè)的一個(gè)小型對外開口保持開

啟，允許將產(chǎn)生過高的壓力或者不同壓力排到大氣中。
Electrolyzer in parking polarization conditions
In electrolytic cell,  completion of the initial purging and flushing electrolyser may stop tripping after about 30 minutes.

Under the condition of close to normal operating temperature, the cell feed shall continue to restart the electrolysis in case slot. Stop condition of electrolyzer shall refer to see  previous section. If the electrolyser stop operation, leading t offline for a long time (more than 6 hours) or prepare for maintenance, equipment must be cooled the reason for drainage.
Feed after parking
When parking cell osmosis will cause a net transfer of the water, moving from the anode chamber to the cathode chamber. So, if there is no lead anode chamber, such as fresh and salt water, brine concentration increased to salting out conditions,
Brine water level drop indoors, about every hour exposure of ionic membrane 1 cm at the top. After the infiltration of water through the ionic membrane erosion intensity is reduced. In table 3.2 rules, before the lower limit of will
Measures should be taken to strengthen erosion force.
During parking and polarization, and should, therefore, to maintain the feed of electrolyzer, velocity of flow control in 3 kA/m, equivalent to the ratio of normal operation (in case to drive). This helps to keep Anolyte chamber in submerged condition, and make the concentration of the liquid anode and cathode liquid changes to a minimum.
The loss of salt water can only allow a short period of time (one to two hours). Fluid must be stored to ensure not occur salting out status, the level of the liquid level drops in ionic membrane at the top of the exposure to the gas. allow
Xu long (12 hours), alkali erosion phenomenon in electrolyzer allowable limit. Saline and alkaline pumping system must have enough reliability, make sure that does not violate the above conditions.
Temperature control. If when driving in a rapidly to liquid temperature of the electrolytic cell did not reach requirement, can allow cooling, but the temperature is not less than 55  C. However, under the condition of polarization temperature is not less than 75  C ( If the anolyte chamber with chlorine or hypochlorite composition, operation must continue). Can through the heater/cooler, saline and alkaline control at the right temperature,.
Cell cooling and drainage
If within the extended period for parking, or, if if asking for cell maintenance, must be for cooling and drainage. Even if

only one unit tank to remove, the whole electrolytic tank must be drained
The inside of the water.
Electrolytic cell must be conducted under the condition of less than 45  C cooling, prevent the drainage, ionic membrane damage. In order to reduce operating time to a minimum, you must install the cooling salt water and lye
Raw material supply of equipment.
During cooling, once the temperature is below 75  C, must be closed polarization rectifier, continue to provide cooling saline and alkaline cell, control output temperature is not lower than 45  C.
During forced cooling and decontamination, saline and alkaline must be sufficient in an acceptable time, fluid rate according to the regulation provides to the electrolytic cell. The minimum flow velocity is:
Brine is 0.16 m3 / hr each unit slots
0.22 m3 / hr each unit slot - caustic
Once the decontamination process completes (confirmed by gas testing) input unit trough emptying purge gas, make sure there

are no vacuum condition and large pressure difference.
Then, immediately close the purge gas, prevent exposed ionic membrane drying. At the same time to isolate the electrolytic cell. Under the condition of isolation, on both sides of the electrolytic cell stay open a small opening to foreign allows you to produce high pressure or different discharge into the atmosphere.

2014.8.30