電廠全廠失電工況潤(rùn)滑油冷卻

1、電廠全廠失電工況潤(rùn)滑油冷卻電廠blackout工況潤(rùn)滑油冷卻方式 全廠失電工況，循環(huán)水中斷，開式冷卻水泵和閉式冷卻水泵停止運(yùn)行，轉(zhuǎn)子惰轉(zhuǎn)造成潤(rùn)滑油溫持續(xù)上升。需要提供額外冷卻水源防止供油油溫超過60，防止轉(zhuǎn)子低轉(zhuǎn)速下油膜減薄造成磨損。 During black out, circulating cooling water will be cut down and operation of OCCW and TCS pump will stop, coasting down of turbine rotor will cause temperature increase of lube oil.

2、 So additional cooling water is needed to defense oil temperature at outlet of oil cooler exceed 60.電廠blackout工況潤(rùn)滑油冷卻方式 目前廠家的意見是全廠失電期間，通過柴油發(fā)電機(jī)帶一臺(tái)TCS泵運(yùn)行，減少潤(rùn)滑油溫上升。 TCS泵功率較大，為380KW，影響了 柴油發(fā)電機(jī)設(shè)計(jì)負(fù)荷。電廠業(yè)主認(rèn)為可以使用一臺(tái)專用小功率冷卻泵冷卻潤(rùn)滑油，該泵可通過就地柴油機(jī)驅(qū)動(dòng)，請(qǐng)廠家和設(shè)計(jì)院考慮可行性。 Opinion of manufacture is that operating one TCS pump b

3、y Diesel Generator, to decrease temperature uprise of lube oil. Power of TCS pump is more bigger value, it will affect design power of DG. owner think can use an additional little power cooling pump to cool lube oil, which will connected to a onsite Diesel engine to make sure this pump will be opera

4、ting during blackout . 電廠blackout工況潤(rùn)滑油冷卻方式 業(yè)主已提出初步方案，在全廠停電工況下，通過手動(dòng)操作，轉(zhuǎn)啟專用冷卻水泵對(duì)潤(rùn)滑油進(jìn)行冷卻。 該初步方案已進(jìn)一步細(xì)化，見方案1： Owner have provide preliminary case, during blackout condition, through manual operating, rotating the cooling pump to cool lube oil. The preliminary case has detailed additionally, details in ca

5、se 1.電廠blackout工況潤(rùn)滑油冷卻方式 方案1：在全廠失電工況，手動(dòng)關(guān)閉冷油器出入口冷卻水閥門V3024A(V3024B)、 V3023A(V3023B)和V1032閥門；手動(dòng)開啟閥門a，啟動(dòng)專用冷卻水泵，開啟閥門b1(b2)，c1(c2)和d，使冷卻水流過冷油器。 during black out, closing inlet and outlet cooling water valve V3024A(V3024B),V3023A(V3023B) and V1032 of oil cooler by operator, manual opening valve a, operati

6、ng special cooling pump, open valve b1(b2)，c1(c2) and d，make cooling water across oil cooler.電廠blackout工況潤(rùn)滑油冷卻方式方案1優(yōu)點(diǎn)：利用CST水位和凝汽器間的高度差、壓力差減少冷卻水泵的揚(yáng)程。如通過水力計(jì)算確認(rèn)可行，冷卻系統(tǒng)可不使用冷卻水泵。Advantage:Through elevation deference and pressure deference between water level of CST and condenser to decrease outlet pressu

7、re of cooling pump.If confirm after hydraulic calculation, cooling pump maybe cancel in cooling system. 方案1缺點(diǎn)：需要操作的閥門較多。在全廠失電情況下，有誤操作的可能。冷卻水在進(jìn)入凝汽器前，因壓力降低，有汽化的可能。Disadvantage:Valve should operating is much bigger. during black out, existing error operating.Before cooling water into condenser, cooling

8、 water maybe boiling because pressure decrease.電廠blackout工況潤(rùn)滑油冷卻方式 方案2：在全廠失電工況，手動(dòng)關(guān)閉冷油器出口冷卻水閥門V3024A(V3024B)，手動(dòng)開啟閥門c1(c2)和閥門d。使TCS系統(tǒng)存水流過冷油器。通過TCS水箱和凝汽器間的高度差保證冷卻水流速。 During black out, manual closing outlet cooling water valve V3024A(V3024B) of oil cooler, manual opening valve c1(c2) and valve d. Makin

9、g existing water in TCS system across oil cooler. Through elevation deference between water level of TCS surge tank and condenser to ensure velocity of cooling water.電廠blackout工況潤(rùn)滑油冷卻方式方案2優(yōu)點(diǎn)：冷卻系統(tǒng)不需安裝冷卻水泵，專用管道閥門少。在全廠失電情況下，操作員的 操作少。Advantage:It doesnt need to set cooling water pump, special tube and v

10、alve is little. during blackout condition, 方案2缺點(diǎn)：TCS膨脹水箱存水20m3在10分鐘后即已排空，排空后冷卻水流速快速下降?？赏ㄟ^增加TCS膨脹水箱容積解決該問題。冷卻水在進(jìn)入凝汽器前，因壓力降低，有汽化的可能。冷油器中冷卻水流速低，換熱效果差。Disadvantage:Existing water 20m3 in TCS Surge Tank will empty in 10min, after TCS Surge Tank empty, velocity of cooling water will decrease rapidly. The

11、question can Before cooling water into condenser, cooling water maybe boiling because pressure decrease.電廠blackout工況潤(rùn)滑油冷卻方式 方案3：增設(shè)一臺(tái)小功率專用TCS泵與現(xiàn)有三臺(tái)TCS泵并聯(lián)，專用TCS泵揚(yáng)程、流量小于現(xiàn)有TCS泵。將專用TCS泵與柴油發(fā)電機(jī)相連。在全廠失電情況下，通過專用泵保證冷油器的冷卻。 A dedicated TCS pump with less power will be added in parallel with current three TCS p

12、ump. Head and flow of this dedicated TCS pump is less than the current TCS pump. This dedicated TCS pump will be connected with DG. During blackout, this pump will be responsible for cooling oil cooler.電廠blackout工況潤(rùn)滑油冷卻方式 方案4：在一臺(tái)冷油器入口閥門V3023A前后加裝管道，安設(shè)一臺(tái)管道泵。在全廠失電情況下，關(guān)閉入口閥門V3023A ，開啟閥門a和b。轉(zhuǎn)啟管道泵，通過TCS系

13、統(tǒng)管路存水冷卻潤(rùn)滑油。 Plan 4: Pipes will be added before and after oil cooler inlet valve V3023A and pump is designed on this pipe line. During blackout, V3023A will be closed and valve a and b will open. The added pump will startup and residual water in TCS pipes is used to cool lube oil.電廠blackout工況潤(rùn)滑油冷卻方式 方案4優(yōu)點(diǎn)： 充分利用TCS系統(tǒng)存水冷卻潤(rùn)滑油，系統(tǒng)變動(dòng)少，風(fēng)險(xiǎn)小。 方案4缺點(diǎn)： 管道泵需要重新設(shè)計(jì)、采購，其進(jìn)度和運(yùn)行性能不能保證。 缺少布置管道泵的空間。 Advantages of Plan 4 Full use of residual water to coo