鍋爐系統(tǒng)外文翻譯

1、<p><b>　　鍋爐系統(tǒng)</b></p><p><b>　　1 冷凝器</b></p><p><b>　　1.1 簡(jiǎn)介</b></p><p>　　歐堡生產(chǎn)的冷凝器是用直管和一個(gè)外部密封浮頭組成的管殼式冷凝器。這種冷凝器主要用作廢氣鍋爐，蒸汽加熱或洗艙海水加熱器的轉(zhuǎn)儲(chǔ)冷凝器/冷卻

2、器排水。并取得權(quán)威船級(jí)社批準(zhǔn)。 </p><p>　　溫度計(jì)，排水閥，空氣閥，壓力表的安裝設(shè)計(jì)為½“BSP內(nèi)螺紋安裝。這些組件可能是指定的。而蒸汽或水的控制設(shè)備是可選的。 </p><p>　　1.2 安裝空間要求 </p><p>　　安裝時(shí)必須有足夠的空間供作清洗，檢查或更換管的插入與撤出。 冷凝器必須安置在水平并穩(wěn)定的表面。</p>

3、<p><b>　　1.3 存儲(chǔ) </b></p><p>　　如果冷凝器在安裝前要閑置一段時(shí)間，應(yīng)存放在干燥的儲(chǔ)藏室里。如果儲(chǔ)藏室潮濕，冷凝器必須放在裝有硅膠的包裝袋子里。為了避免破壞，建議冷凝器放在原包裝中。 </p><p>　　冷凝器已經(jīng)在交付前做過(guò)液壓試驗(yàn)。試驗(yàn)中所用測(cè)試媒質(zhì)含有一定的數(shù)額抗腐蝕保護(hù)物質(zhì)。 </p><p>

4、;　　當(dāng)冷凝器需閑置的時(shí)間較長(zhǎng)，建議使用指定產(chǎn)品作為防腐蝕物質(zhì)</p><p><b>　　1.4 安裝 </b></p><p>　　冷凝器設(shè)計(jì)為垂直或水平安裝。在水平安裝的情況下，蒸汽噴嘴必須朝上，而冷凝水出口噴嘴朝下。 </p><p>　　如果是垂直安裝冷凝器，蒸汽入口和海水出口端必須朝上。排水和空氣排放閥必須安裝在冷凝器在最低和最高

5、點(diǎn)的中間線的位置。 </p><p>　　任何選擇性的控制設(shè)備必須根據(jù)具體指示安裝。 </p><p>　　步驟A：將冷凝器安裝在水平平面上。 </p><p>　　步驟B：鉆基礎(chǔ)固定螺栓孔。 </p><p>　　步驟C：將螺栓放入孔中并擰緊。 </p><p><b>　　連接冷凝器 </b>

6、</p><p>　　步驟D：移除所有的塞子和盲板，然后再連接冷凝器。 </p><p>　　步驟E：在連接中確保沒(méi)有雜質(zhì)進(jìn)入。 </p><p>　　步驟F：管道連接起來(lái)，確保從管道和冷凝器之間沒(méi)有強(qiáng)制力的產(chǎn)生。 </p><p><b>　　1.5 調(diào)試 </b></p><p>　　啟動(dòng)前

7、要確保所有連接都牢固地?cái)Q緊是很重要的。同樣重要的是，冷凝器和連接管道空氣要徹底排出。 </p><p>　　步驟A：如果裝有安全閥，必須加以調(diào)整到最大設(shè)計(jì)壓力或較低。 </p><p>　　步驟B：法蘭螺栓要擰緊。擰緊法蘭螺栓時(shí)始終使用扭矩扳手。 </p><p>　　步驟C：運(yùn)行一小時(shí)，停止冷凝器，并重新擰緊所有螺栓。 </p><p>　

8、　步驟D：?jiǎn)?dòng)階段，冷凝器的兩邊都要排出空氣，必須認(rèn)真仔細(xì)的檢查回路的泄漏。</p><p><b>　　1.6 性能 </b></p><p>　　冷凝器性能須附和傳熱計(jì)算表規(guī)定的要求。，保持指定的蒸汽壓力特別重要，因?yàn)閴毫档涂赡軐?dǎo)致進(jìn)口速度過(guò)大，將會(huì)使其產(chǎn)生噪音并損害冷凝器，而較低的壓力下會(huì)降低熱性能。通常，有效評(píng)估冷凝器性能的方法是通過(guò)監(jiān)測(cè)評(píng)估冷凝水出口溫度

9、或海水出口溫度。如果冷凝水溫度過(guò)高或海水出口溫度過(guò)低，要么是冷凝器需要清洗或操作參數(shù)不正確。需要檢查其工作條件，并采取適當(dāng)?shù)募m正行動(dòng)，以使性能恢復(fù)所要求的水平。 </p><p>　　1.7 在關(guān)閉期間的保護(hù) </p><p>　　在關(guān)閉期間發(fā)生的腐蝕，主要是由于氧氣的存在。如果存在非蒸餾水，如堿性或海水在冷凝器中，就很容易發(fā)生腐蝕。然而，即使在完全放空的情況下，冷凝器接觸到殘留的冷凝水

10、仍然會(huì)造成腐蝕。因此，當(dāng)停止工作時(shí)，應(yīng)當(dāng)通過(guò)使用淡水沖洗海水端，并仔細(xì)在兩端泄放以保護(hù)冷凝器，</p><p>　　如果冷凝器需在一個(gè)較長(zhǎng)時(shí)期的停止工作 ， 尤其是在寒冷的冬季 。必須小心清空。打開(kāi)空氣閥口并檢查堵塞情況。 </p><p>　　1.8 維護(hù)和清潔 </p><p>　　冷凝器應(yīng)定期清理，每十二個(gè)月或當(dāng)沒(méi)有其他原因的情況下而輸出下降的時(shí)候，應(yīng)將內(nèi)部

11、的管子移出清潔。</p><p>　　步驟A：檢查是否有水在收集箱或管子中。 </p><p>　　步驟B：將內(nèi)部管束取出后，用有壓力的液體進(jìn)行外部清洗</p><p>　　步驟3：將管束的上蓋移除后，使用酸性的液體從內(nèi)部進(jìn)行清潔，表面的雜質(zhì)可以用軟質(zhì)尼龍刷去除。但很重要的一點(diǎn)是進(jìn)行機(jī)械清除時(shí)不要破壞管子的表面。</p><p>　　步驟D：

12、安全閥必須每年都要檢查其設(shè)置點(diǎn)是否正確。</p><p>　　1.9 拆卸和重裝管束 </p><p>　　當(dāng)需要將管束從冷凝器中取出時(shí) ，必須拆除海水連接頭，拆下蒸汽進(jìn)口處的水箱，松下其他水箱的連接螺栓需要利用水箱中的頂升螺栓將水箱和管架連接用的緊固O(píng)形圈拉開(kāi)。在拉出管束前，應(yīng)使用帶狀材料纏繞保護(hù)管架箱浮動(dòng)端的表面。由于管束和包裝表面容易損傷，一定要輕拿輕放。</p>&

13、lt;p>　　檢查管束，水箱和外殼是否遭到破壞或過(guò)度磨損，進(jìn)行必要的維修和清洗后，重新組裝冷凝器。在水箱浮動(dòng)端的環(huán)槽中安裝新的O形圈，并涂耐熱硅潤(rùn)滑脂，使安裝更容易，并可以增加墊材的使用壽命。然后將管束裝入管架中，在插入管束前，管架始終要用包裝材料保護(hù)。使抗沖擊板塊正對(duì)蒸汽噴嘴的沖擊是十分重要的，不然可能會(huì)因?yàn)楣茏颖贿^(guò)度侵蝕而發(fā)生故障。安裝末端水箱。取下管架浮動(dòng)端的包裝帶，輕輕地將浮動(dòng)端水箱滑上。這是極為重要的板塊正面臨沖擊的蒸汽

14、噴嘴，否則可能會(huì)失敗，使用法蘭螺栓確保無(wú)偏斜地固定水箱后，裝上管子并鎖緊螺絲。</p><p>　　墊片表面要清潔并防止損壞，每拆下一個(gè)接頭都要更換新的墊片。應(yīng)當(dāng)盡量使用原裝墊片和墊圈，并保證安裝牢固緊密。</p><p>　　需始終使用扭力扳手上緊法蘭螺栓。</p><p>　　運(yùn)行冷凝器一個(gè)小時(shí)，停止，然后上緊法蘭螺栓。</p><p>

15、　　對(duì)接頭的緊密性進(jìn)行壓力實(shí)驗(yàn)。</p><p>　　在運(yùn)行期間，對(duì)冷凝器進(jìn)行小心的泄放，并對(duì)循環(huán)回路進(jìn)行檢查是否漏泄。</p><p><b>　　1.10 備件 </b></p><p>　　訂貨時(shí)請(qǐng)注明零件的冷凝器（在銘牌上）的序列號(hào)。需要備件的進(jìn)一步信息，請(qǐng)聯(lián)系歐堡工業(yè)。</p><p><b>　　

16、2 化學(xué)定量泵</b></p><p><b>　　2.1 簡(jiǎn)介 </b></p><p>　　化學(xué)定量泵是由微處理器控制的電磁定量泵。該泵能夠準(zhǔn)確顯示液體化學(xué)品加藥壓力管道系統(tǒng)中的流量，并能進(jìn)行容器的打開(kāi)和關(guān)閉?；瘜W(xué)定量泵的主要組成部分包括操作面板，電源端，液源腔 </p><p>　　該泵的工作原理是液端定量膜由微處理器控制

17、作動(dòng)的電磁鐵驅(qū)動(dòng)，形成脈沖作用在化學(xué)液體上，這就引起吸口端 ，液體腔和排出端之間產(chǎn)生壓力差。這個(gè)壓力差將引起吸口和出口的自動(dòng)閥開(kāi)啟或關(guān)閉，從而供應(yīng)化學(xué)液體。 </p><p>　　泵的容量（供給速度）取決于行程長(zhǎng)度和行程率。沖程長(zhǎng)度使用行程長(zhǎng)度調(diào)節(jié)旋鈕在0％和100％間調(diào)節(jié)。最佳劑量是設(shè)置在30％和100％行程的長(zhǎng)度。行程率10%和100％之間使用的多功能開(kāi)關(guān)進(jìn)行步進(jìn)調(diào)節(jié)，每級(jí)為10%。但在外部模式中，行程率是由

18、電信號(hào)控制的。</p><p><b>　　2.2 安全 </b></p><p>　　在安裝，調(diào)試，運(yùn)行，維護(hù)和修理期間必須始終應(yīng)遵守遵循以下安全原則</p><p>　　請(qǐng)注意，泵的設(shè)計(jì)不適合用于：</p><p>　　（1）氣體化學(xué)物質(zhì)或懸浮固體和容易爆炸的危險(xiǎn)場(chǎng)所。</p><p>　　

19、（2）在緊急情況下的泵應(yīng)立即關(guān)閉。斷開(kāi)電源的電源線。 </p><p>　?。?）在任何時(shí)候都應(yīng)該能夠方便地進(jìn)行操作和管理。附近不能有障礙 </p><p>　?。?）水泵和外圍設(shè)備只有合格和有授權(quán)的維修人員才能對(duì)其進(jìn)行維修和管理。 </p><p>　?。?）當(dāng)做有關(guān)泵的工作時(shí)，首先要斷開(kāi)電源</p><p>　　（6）在做有關(guān)泵的工作前，

20、必須泄放出口管路上的壓力液體，放空液腔中的液體，并沖洗干凈。 </p><p>　　（7）務(wù)必閱讀化學(xué)品安全數(shù)據(jù)。 </p><p>　　（8）處理危險(xiǎn)或未知的化學(xué)物質(zhì)，務(wù)必穿上防護(hù)服時(shí)</p><p>　　（9）如果排出管被封鎖，切勿讓定量泵運(yùn)轉(zhuǎn)，因?yàn)檫@可能會(huì)導(dǎo)致排出管道破裂。</p><p><b>　　2.3 安裝</

21、b></p><p>　　2.3.1 一般安裝 </p><p>　　化學(xué)定量泵通常預(yù)裝在化工罐上。因此該泵安裝或更換的地方必須遵守以下安裝注意事項(xiàng)： </p><p>　?。?）化學(xué)定量泵必須位于一個(gè)環(huán)境溫度在-10 C至+45之間，在非冷凝的情況下相對(duì)濕度不超過(guò)92%的環(huán)境中</p><p>　　（2）泵的泵腳必須牢固地安裝在牢固

22、的基準(zhǔn)座上，泵運(yùn)行時(shí)不能震動(dòng) </p><p>　?。?）啟動(dòng)和運(yùn)行時(shí)不得超過(guò)其最大允許壓力。這種泵的最大吸高為2 mmWC，最大工作壓力為16巴。例如由于化學(xué)物質(zhì)供應(yīng)系統(tǒng)的位置，導(dǎo)致運(yùn)行壓力超標(biāo)的情況下，在出口端必須安裝一個(gè)安全閥，多余的液體回到吸口 </p><p>　?。?）吸入和排出閥必須安裝在垂直位置。 </p><p>　?。?）其管子必須具備這樣的要求

23、，即如果需要，允許將泵和液腔拆開(kāi)，在安裝時(shí)不能產(chǎn)生應(yīng)力和彎曲，所以只有原裝的產(chǎn)品才能達(dá)到這種尺寸要求。 </p><p>　　（6）吸入管應(yīng)呈上升趨勢(shì)并盡可能短以防止氣泡的形成。 </p><p>　?。?）由于在底部有化學(xué)品的沉淀和雜質(zhì)，底閥的位置要高于它們的位置。 </p><p>　　（8）連接到供應(yīng)系統(tǒng)的出口管的止回閥必須上緊。</p><

24、;p>　　2.3.2 電氣安裝 </p><p>　　該泵是和主電源的連接通過(guò)主電源線。如果泵連接到電源時(shí)與感應(yīng)元件并聯(lián)，必須對(duì)他們進(jìn)行電器隔離，防止開(kāi)關(guān)斷開(kāi)時(shí)產(chǎn)生的沖擊造成損害。</p><p><b>　　2.4 操作</b></p><p>　　這個(gè)化學(xué)定量泵的操作面板配有支持泵的設(shè)置和運(yùn)作操作開(kāi)關(guān)，接線端子，和指示器。 <

25、;/p><p>　　該泵可通過(guò)手動(dòng)操作控制或外部控制。如果泵僅需要手動(dòng)操作模式時(shí)將不會(huì)提供可選的終端接到“外部控制”。當(dāng)泵需要是通過(guò)“外部控制”和/或“浮動(dòng)開(kāi)關(guān)”控制時(shí)，必須提供可選的終端</p><p><b>　　外部控制。</b></p><p>　　“在化學(xué)品罐中裝有測(cè)量液位的浮動(dòng)開(kāi)關(guān)，它能夠提供液位信號(hào)到泵。由于液位的變化需要安裝兩個(gè)浮動(dòng)

26、開(kāi)關(guān)到接線端子。同時(shí)泵也需要進(jìn)一步安裝故障監(jiān)測(cè)繼電器用于低水位報(bào)警。 </p><p>　　以下為泵操作指令的完整描述。如果化學(xué)計(jì)量泵包括零件或功能，不是用于定量供應(yīng)系統(tǒng)，這些指令可以忽略。 </p><p>　　2.5 泵的基本信息</p><p>　　2.5.1 行程長(zhǎng)度調(diào)節(jié)旋鈕 </p><p>　　行程長(zhǎng)度可以在0％和100通過(guò)調(diào)

27、節(jié)沖程長(zhǎng)度調(diào)節(jié)旋鈕進(jìn)行連續(xù)性的調(diào)節(jié)。在技術(shù)上只有再現(xiàn)性在調(diào)整范圍30％至100％可行。 </p><p>　　2.5.2 多功能開(kāi)關(guān) </p><p>　　多功能開(kāi)關(guān)用來(lái)選擇操作模式和設(shè)置行程率。下面的操作模式是供多功能開(kāi)關(guān)選擇的模式： </p><p><b>　　停止。 </b></p><p><b>

28、　　外部。 </b></p><p>　　手動(dòng)（設(shè)置在10％的行程步進(jìn)率）。 </p><p>　　測(cè)試（自吸功能）。 </p><p><b>　　（1）停止 </b></p><p>　　“停止”功能使泵電源未斷開(kāi)也可以停用。</p><p><b>　　（2）外部 &l

29、t;/b></p><p>　　外部操作模式允許通過(guò)觸點(diǎn)或者半導(dǎo)體的外部模式操縱設(shè)備單獨(dú)調(diào)節(jié)其行程</p><p>　　“暫?！惫δ?，可以通過(guò)外部終端遠(yuǎn)程操作使泵停止。</p><p><b>　　（3）手動(dòng)操作</b></p><p>　　手動(dòng)操作模式通過(guò)多功能開(kāi)關(guān)對(duì)行程率進(jìn)行10％的步進(jìn)調(diào)整。 </p&g

30、t;<p><b>　?。?）測(cè)試 </b></p><p>　　“測(cè)試”功能檢查泵的自吸的功能。開(kāi)關(guān)設(shè)置在測(cè)試位時(shí)，多功能開(kāi)關(guān)“測(cè)試”是自動(dòng)的。 </p><p>　　2.5.3 LED指示燈 </p><p>　　運(yùn)行和錯(cuò)誤狀態(tài)通過(guò)操作面板上的三個(gè)指示燈顯示： </p><p>　　綠色LED指示燈，

31、操作顯示：此LED點(diǎn)亮?xí)r排出行程被激活。 </p><p>　　黃色的LED指示燈，報(bào)警指示燈：如果設(shè)備裝有浮動(dòng)開(kāi)關(guān)，LED燈亮?xí)r，表明液面低于第一觸發(fā)液面。 </p><p>　　紅色LED指示燈，故障指示燈：如果裝有浮子開(kāi)關(guān)，指示燈亮起來(lái)時(shí)說(shuō)明液位測(cè)量發(fā)生故障。它閃爍時(shí)表示未定義的運(yùn)行狀態(tài)</p><p><b>　　2.6 保養(yǎng).</b>

32、;</p><p>　　為確保化學(xué)定量泵工作安全和性能可靠，必須進(jìn)行定期保養(yǎng)。正常保養(yǎng)間隔為三個(gè)月。這是根據(jù)其運(yùn)行時(shí)間大約為30％時(shí)制定的。但在使用比較頻繁的情況下，保養(yǎng)周期應(yīng)縮短。進(jìn)行以下維護(hù)工作： </p><p>　　檢查泵短期運(yùn)行時(shí)進(jìn)給率是否正確。 </p><p>　　檢查排氣孔處的化學(xué)品是否滲流。 </p><p>　　檢查排出管

33、與液源端連接是否牢固。 </p><p>　　檢查排出和吸入閥是否牢固地固定。 </p><p>　　檢查液源端尤其是排氣孔處的水密性。 </p><p><b>　　檢查膜片是否損壞</b></p><p>　　檢查液源端的固定螺絲是否上緊。 </p><p>　　檢查泄放閥是否牢牢地固定到位。

34、 </p><p>　　檢查泄放功能是否正常運(yùn)行。 </p><p>　　檢查電氣接線有沒(méi)有破損。</p><p>　　Boiler System</p><p>　　1 Condenser</p><p>　　1.1 General description

35、 </p><p>　　Aalborg Industries' MD condensers are of the shell and tube type with straight tubes and an externally seale

36、d floating head. The MD condenser is primarily used as dump condenser/drain cooler for exhaust gas boilers, or as steam heated tank cleaning heater for sea water. The condensers are approved by major marine classificatio

37、n societies.</p><p>　　Thermometers, drain valve, air valve, and pressure gauge can be fitted on designated ½" BSP threads. These components may be supplied on request. Control equipment for either

38、steam or water is optional.</p><p>　　1.2 Installation space requirements</p><p>　　When mounting the condenser sufficient space must be allowed for withdrawal of the tube insert for cleaning, in

39、spection, or replacement purposes. The condenser must be placed on a level and stable surface.</p><p>　　1.3 Storage</p><p>　　If the condenser must be stored prior to the installation, it should

40、 be in a dry storage room. If the storage room is damp, the condenser must be wrapped together with bags of silica gel. To avoid damages it is recommend that the condenser is stored in the original packing.</p>&l

41、t;p>　　The condenser has been hydrostatically tested before delivery. The used test medium contains a certain amount of corrosion protection . </p><p>　　When the condenser is kept in storage for an extende

42、d period of time, it is recommend to use Castrol Rustilo Aqua 2 as protection against corrosion.</p><p>　　1.4 installation</p><p>　　The condenser is designed for either vertical or horizontal i

43、nstallation. In case of horizontal installation the steam inlet nozzle must face upwards, and the condensate outlet nozzle face downwards.</p><p>　　If the condenser is mounted vertically, the steam inlet and

44、 sea water outlet end must face upwards. Drain and air vent valves must be mounted according to the orientations of the condenser e.g. lowest and highest ½" thread position on the shell.</p><p>　　A

45、ny optional control equipment must always be installed according to specific instructions.</p><p>　　STEP A：Place the condenser on a level and plane surface.</p><p>　　STEP B：Drill the holes for t

46、he foundation bolts.</p><p>　　STEP C：Place the bolts into the holes and tighten up.</p><p>　　Connecting the condenser</p><p>　　STEP D：Remove all plugs and blind flanges before conne

47、cting the condenser.</p><p>　　STEP E：Ensure that no impurities are present in the connection</p><p>　　STEP F：Set up the pipe connections and make sure that no forces from the piping are transfer

48、red to the condenser</p><p>　　1.5 Commissioning</p><p>　　Before start-up it is important to make sure that all connections are securely tightened. It is equally important that the condenser and

49、 the connecting pipes are thoroughly air-vented.</p><p>　　STEP A：If a safety valve is fitted it must be adjusted to maximum design pressure or lower.</p><p>　　STEP B：Tighten all main flange bolt

50、s . Always use a torque wrench when tightening the flange bolts.</p><p>　　STEP C：Operate the condenser for one hour, stop, and retighten all bolts .</p><p>　　STEP D：Both sides of the condenser m

51、ust be carefully vented and the circuits carefully inspected for leakage during the whole start-up period.</p><p>　　1.6 Performance</p><p>　　The performance of the condenser is subject to the c

52、onditions specified in the heat transfer calculation sheet. It is particularly important that the steam pressure is maintained as specified, since lowering the pressure may cause excessive inlet velocity which may be bot

53、h noisy and harmful to the condenser, as well as the lower pressure will decrease the thermal performance. Usually it will be sufficient to evaluate the performance of the condenser by monitoring the outlet temperature o

54、f either</p><p>　　1.7 Conservation during shut down periods</p><p>　　Corrosion occurrences in shut down periods are mainly caused by oxygen. The corrosion occurs if non-distilled, alkaline or s

55、ea water remains in the condenser. However, even when fully emptied, the condenser is exposed to corrosion caused by water residues or condensation. Hence, when out of service, it should be protected against corrosion by

56、 flushing with fresh water on the sea water side and carefully draining of both sides.</p><p>　　If the condenser is out of service for an extended period of time – in particular during winter seasons with fr

57、ost – it must be carefully emptied. Open the air vent valve and check for clogging.</p><p>　　1.8 Maintenance and cleaning</p><p>　　The condenser should be cleaned regularly by removing the tube

58、 insert every twelve months or at any time there is a decrease in output not related to other causes.</p><p>　　STEP A：Check if any deposits have collected in the water boxes or in/on the tubes.</p>&l

59、t;p>　　STEP B：Cleaning of the tube bundle from the outside is carried out after removing the tube insert using a liquid jet </p><p>　　STEP C：Cleaning of the tube bundle from the inside is carried out after

60、 removing the cover by flushing the tubes with e.g. citric acid. To remove scales or impurities a soft nylon brush can be used, but it is very important not to damage the tube surface during mechanical cleaning.</p>

61、;<p>　　STEP D：Once every year the safety valve must be checked for correct set point. </p><p>　　1.9 Dismantling and reassembling of the tube bundle</p><p>　　When the tube bundle must be

62、pulled from the condenser, the sea water connections must be dismantled and the water boxes at the steam inlet removed. Loosen the bolts for the other water box and use the jacking bolts in the water box to pull the wate

63、r box off the tight O-ring fitting with the tube sheet. Protect the floating end tube sheet packing surface with a wrap of tape before pulling the bundle. Handle the bundle and water boxes with care, since both tubes and

64、 packing surfaces can be damage</p><p>　　Inspect the tube bundle, water boxes and the shell for damage and excessive wear, make necessary repairs and cleaning and reassemble the condenser. Fit new O-rings to

65、 the floating end water box gasket grooves and grease with heat resistant silicone grease to ease the mounting and increase the gasket life time. Mount the bundle in the shell and remember to protect the packing surface

66、of the tube sheet before inserting the bundle. It is extremely important that the impingement plate is facing the </p><p>　　Gasket surfaces must be cleaned and protected against damage. New gaskets should be

67、 fitted every time a connection has been dismantled. To ensure a tight fit only original spares should be used when replacing the gaskets and O-rings.</p><p>　　Always use a torque wrench when tightening the

68、flange bolts.</p><p>　　Operate the condenser for one hour, stop, and retighten all bolts </p><p>　　A pressure test should be carried out to prove tight joints.</p><p>　　Both sides o

69、f the condenser must be carefully vented and the circuits carefully inspected for leakage during the whole start-up period.</p><p>　　1.10 Spare parts</p><p>　　When ordering spare parts please s

70、tate the serial number of the condenser (located on the nameplate). For spare parts and further information please contact Aalborg Industries.</p><p>　　2 Chemical dosing pump</p><p>　　2.1 Gene

71、ral</p><p>　　The chemical dosing pump is a microprocessor controlled solenoid metering pump. The pump offers highly accurate reproducible metering in the dosing of liquid chemicals in pressurised pipe system

72、s, and into open and closed containers. The main components of the chemical dosing pump are the operating panel, power end, and liquid end..</p><p>　　The working principle of the pump is that chemical feed o

73、ccurs as a result of pulsed deflections of the dosing diaphragm within the liquid end, which causes pressure differentiation between the suction side, liquid end cavity, and discharge side. The pressure differentiation c

74、auses the suction and discharge self-acting valves to open and close, resulting in chemical feed. The dosing diaphragm is driven by an electromagnet, which is stimulated and controlled by a microprocessor.</p><

75、;p>　　The pump capacity (feed rate) is determined by the stroke length and stroke rate. The stroke length is set between 0% and 100% using the stroke length adjustment knob. Optimum dosing reproducibility is achieved b

76、y setting the stroke length between 30% and 100%. The stroke rate adjustable in 10% steps between 0% and 100% using the multifunction switch. However, in "external" operating mode the stroke rate is controlled

77、by electrical signals.</p><p>　　2.2 Safety</p><p>　　The following safety guide lines must always be observed during installation, commissioning, operation, maintenance, and repair: </p>

78、<p>　　（1）Please note that the pump is not designed for:Use with gaseous chemicals or suspended solids and in explosion-hazardous locations.</p><p>　?。?）In emergency cases the pump should be switched off

79、 immediately. Disconnect the power cable from the power supply.</p><p>　?。?）The pump must be accessible at all times for both operation and servicing. Access must not be obstructed in any way.</p><

80、;p>　?。?）The pumps and peripherals must be serviced and repaired by qualified and authorised persons only.</p><p>　　（5）Before working on a pump always disconnect the mains power.</p><p>　?。?）B

81、efore working on a pump always de-pressurise the discharge line, empty the liquid end, and rinse out.</p><p>　?。?）Always read the chemical safety data.</p><p>　?。?）Always wear protective clothin

82、g when handling hazardous or unknown chemicals.</p><p>　　（9）Never allow the metering pump to operate if the discharge line is blocked, as this can result in a rupture of the discharge line.</p><p&

83、gt;　　2.3 Installation</p><p>　　2.3.1 general Installation</p><p>　　The chemical dosing pump is normally pre-mounted a chemical tank. However, in case that the pump must be mounted elsewhere or

84、 replaced please observe the following general installation notes </p><p>　?。?）The chemical dosing pump must be located in an environment with ambient temperature between -10C to +45C and a maximum permissib

85、le relative humidity of 92% non-condensing.</p><p>　?。?）The pump must be mounted with the pump foot resting on a firm horizontal base. Ensure that it is fastened into place firmly, and will not vibrate in op

86、eration.</p><p>　?。?）The maximum permissible priming and operating pressures must not be exceeded. For this type of pump the maximum priming lift is 2 mmWC and the maximum operating pressure is 16 barg. In c

87、ase that the operating pressure is exceeded, e.g. due to the position of the chemical feed into the feed system, the discharge side must be provided with a relief valve. The surplus chemicals should be led back to the c

88、hemical tank.</p><p>　?。?）Suction and discharge valves must be installed in a vertical position.</p><p>　　（5）The tubing should be attached in such a way that it allows lateral detachment of the

89、pump and liquid end, if necessary. The tubing must be free from stress and bends when fitted. Only original hoses with the correct dimensions should be used.</p><p>　　（6）The suction tubing should be as short

90、 as possible and rising in order to prevent air bubbles forming.</p><p>　　（7）The foot valve should be installed so that it hangs just above the bottom of the chemical tank. For chemicals with impurities or s

91、edimentation at the bottom, the foot valve should be positioned well above this layer.</p><p>　　（8）The check valve, which connects the discharge line to the feed water system, must be tightened properly.<

92、/p><p>　　2.3.2 Electrical installation</p><p>　　The pump is connected to the mains power supply by using the mains lead. If the pump is connected to the mains in parallel with inductive power con

93、sumers (e.g. solenoid valves, motors) it must be electrically isolated. This prevents damage caused by induction and voltage surges when switching off. illustrates the power element of the pump.</p><p>　　2.4

94、 operation </p><p>　　The operation panel of the chemical dosing pump is equipped with operation knobs/switches, connection terminals, and indicators, which support the operation and setting of the pump.<

95、;/p><p>　　The pump can be operated through manual control or external control. If the pump is intended only to operate in manual mode it will not be provided with the optional terminal connection "external

96、 control" 。 When the pump is intended to operate via "external control" and/or "float switch" the actual terminal connections must be provided.</p><p>　　The "Float switch&

97、quot; option provides information on the liquid level in the feed chemical tank, which is transmitted to the pump. This option requires the installation of a two-stage float switch and connection to the "float switc

98、h" terminal. The pump can, furthermore, be equipped with fault indicating relays for warning of low levels.</p><p>　　The following instruction for pump operation is described as a complete instruction.

99、If the chemical dosing pump includes parts or features, which are not provided for the actual dosing unit, the specified instructions should be disregarded.</p><p>　　2.5 Basic information for the pump</

100、p><p>　　2.5.1 Stroke length adjustment knob</p><p>　　The stroke length is continuously adjustable between 0% and 100% via the stroke length adjustment knob. Reproducibility is only technically pra

101、cticable in the adjustment range 30% to 100%.</p><p>　　2.5.2 Multifunction switch</p><p>　　The multifunction switch is used to select the operating mode and to set the stroking rate. The follow

102、ing operating modes are selected using the multifunction switch:</p><p><b>　　Stop.</b></p><p><b>　　External.</b></p><p>　　Manual (to set stroking rate in 10%

103、 steps).</p><p>　　Test (priming suction function).</p><p><b>　　（1）Stop</b></p><p>　　The "Stop" function allows the pump to be deactivated without disconnecting

104、 from the power supply.</p><p>　　（2）External</p><p>　　The "External" operating mode allows adjustment of individual strokes via the external operating mode terminal by means of contact

105、 or semi-conductor devices.</p><p>　　The "Pause" function can be used to operate a remote pump stop function via the external operating terminal.</p><p><b>　　（3）Manual</b>&

106、lt;/p><p>　　In the "Manual" operating mode the stroking rate is manually adjustable in 10% steps via the multifunction switch.</p><p><b>　　（4）Test</b></p><p>　　Th

107、e "Test" function checks the priming function of the pump. The switch setting "Test" on the multifunction switch is self-acting.</p><p>　　2.5.3 LED indicators</p><p>　　The o