激活觸發(fā)跳閘-中英對照
激活聯(lián)合整流器跳閘系統(tǒng).
5.2.9 其它可選擇的跳閘系統(tǒng)
取決于程序和特定因素，以下故障模式使其對應(yīng)相關(guān)跳閘系統(tǒng)或成為必要或值得擁有。
1. 進(jìn)料側(cè)鹽水槽液面低位（近于零）可以用來啟動所有聯(lián)合低/無流量鹽水進(jìn)料跳閘系統(tǒng)。
2. 對于多用型電解槽電解車間，室內(nèi)氯氣高壓能用來啟動所有聯(lián)合整流器跳閘系統(tǒng)。
3. 對于多用型電解槽電解車間，室內(nèi)氫氣高壓能用來啟動所有聯(lián)合整流器跳閘系統(tǒng)。
4. 氯氣壓縮機(jī)跳閘能用來啟動所有聯(lián)合整流器跳閘系統(tǒng)。
5. 全儀表氣源故障能夠用來啟動所有聯(lián)合整流器跳閘系統(tǒng)。
5.3 重要安全警報(bào)
此章將會對電解槽可靠安全的運(yùn)行所需的警報(bào)作詳述，標(biāo)有“重要”的為必備警報(bào)。其他標(biāo)記為“可選”的為推薦，但不是最重要的，其所包含的功能一般就具體情況具體而定。
5.3.1每個電解槽上的高壓警報(bào)（可選）
該警報(bào)隨單元槽使用時間和情況可進(jìn)行調(diào)節(jié)，對于單個電解槽出現(xiàn)的問題可提供早期預(yù)警，設(shè)定值應(yīng)在電解槽電壓最大載入值上加0.05伏特，視電解槽內(nèi)單元槽數(shù)量增加而增加。
5.3.2每個單元槽上的高壓警報(bào)（可選）
該警報(bào)的信號賴在兩種單元槽電壓測量裝置（詳情見于有關(guān)跳閘的章節(jié)），單元槽電壓既能夠通過使用單元槽電壓測量儀來測量，也能在沒有自動電壓監(jiān)測系統(tǒng)的情況下，通過比較一個分框架里兩組單元槽的電壓來獲得。關(guān)于此種供選擇的系統(tǒng)的設(shè)定詳情見下文：
(i) 單個單元槽測量裝置警報(bào)的設(shè)定能隨單個單元槽的使用時間和情況進(jìn)行調(diào)節(jié)。設(shè)定值應(yīng)在單元槽電壓最大載入值之上0.25伏特。
(ii) 電壓對比裝置比較包括一個電解槽內(nèi)相等數(shù)量的單元槽的兩組電壓。裝置設(shè)定根據(jù)單元槽的使用時間和情況進(jìn)行調(diào)節(jié)，使得在正常運(yùn)行條件下，兩組之間相對電壓為零伏特。通�？梢圆捎糜步泳�的單臂電橋回路，但該性能也可以在DCS內(nèi)運(yùn)行。該電壓偏離警報(bào)設(shè)定應(yīng)為+/-0.25伏特，一組單元槽的最大數(shù)為10。
5.3.3 電解槽進(jìn)料側(cè)鹽水和進(jìn)料側(cè)堿液高溫警報(bào)（重要）
進(jìn)料側(cè)鹽水和堿液溫度的測量和報(bào)警，設(shè)定在最大允許值溫度，且符合電解槽和塑料管道系統(tǒng)的限制，設(shè)定值應(yīng)為89℃，如果使用了共同熱交換器來控制進(jìn)料溫度，那單用報(bào)警器監(jiān)測共同進(jìn)料溫度就可以了。
Trip Actions
Activates associated rectifier trip system.
5.2.9 Other Optional Trip Systems
Depending upon the process and specific factors it might be desirable / necessary that the following failure modes provide inputs to the relevant trip systems.
1. Low low level in brine feed tank (close to empty) can be used to initiate all associated low / no flow brine feed trip systems.
2. High cellroom chlorine pressure for a multi Electrolyser cellroom could be used to initiate all the associated rectifier trip systems.
3. High cellroom hydrogen pressure for a multi Electrolyser cellroom could be used to initiate all the associated rectifier trip systems.
4. Chlorine compressor trip could be used to initiate all associated rectifier trip systems.
5. Complete instrument air failure could be used to initiate all associated rectifier trip systems.
5.3 Essential Alarms
Alarms required for reliable and safe operation of Electrolysers are detailed in this section. Those labelled ‘essential’ must be provided. Others labelled ‘optional’ are recommended, but not considered essential. Their inclusion is generally decided on a case by case basis.
5.3.1 High voltage on each Electrolyser (optional)
This alarm is adjustable with module age/condition and will give early warning of an individual Electrolyser problem. The setting should be the maximum load Electrolyser voltage plus 0.05 volts multiplied by the number of modules in the Electrolyser.
5.3.2 High voltage for each module (optional)
The signal for this alarm can come from one of two types of module voltage measurement device (see section on trips for further information). Module voltage can either be measured directly using a module voltage scanning instrument, or if there is no automatic voltage monitoring system, it can be inferred from a comparison of voltages across two groups of modules in the pack. Details of the settings for the alternative systems are provided below:
(i) Individual module scanning device alarm setting can be adjusted for individual module age/condition. Setting should be 0.25 volts above maximum load module voltage.
(ii) Voltage comparison device compares voltages of two blocks comprising an equal number of modules within an Electrolyser. The setting of the device is adjusted for module age/condition such that at normal operating conditions the relative voltage of the two blocks is zero volts. Typically a hard wired Wheatstone Bridge circuit will be used for this duty but this function could also be performed within a DCS. The voltage deviation alarm should be set at +/- 0.25 volts, and the maximum number of modules in one block is 10.
5.3.3 Feed brine and feed caustic high temperature to Electrolyser (essential)
Measurement and alarm on Electrolyser feed brine and caustic temperatures, set at maximum allowable temperature consistent with Electrolyser and plastic pipework limits. Setting should be 89C. If common heat exchangers are used to control feed temperatures, single alarm on common feeds will suffice.
2014.8.18