脫硫聯(lián)鎖保護(hù)

1、國電宿遷熱電有限公司2×135MW機(jī)組煙氣脫硫工程運(yùn)行培訓(xùn)手冊北京國電龍?jiān)垂こ逃邢薰舅捱w分公司編 制： 校 對：審 核：批 準(zhǔn)：時間：2010年 02月目 錄第一章 系統(tǒng)概述及設(shè)備簡介································11.1 脫硫系統(tǒng)概

2、述··················································

3、;11.2工藝原理················································

4、83;······11.3脫硫吸收劑及副產(chǎn)品的性質(zhì)·······································2脫硫吸收劑的性質(zhì)&#

5、183;············································2脫硫副產(chǎn)品的性質(zhì)····

6、;·········································31.4工藝系統(tǒng)主要包括·······

7、;········································41.5脫硫系統(tǒng)簡介········&

8、#183;··········································4 煙氣系統(tǒng)簡介······

9、;···········································4預(yù)洗滌塔、吸收塔系統(tǒng)簡介····

10、3;·································5硫銨結(jié)晶脫水系統(tǒng)簡介···············

11、;···························6液氨儲存及蒸發(fā)系統(tǒng)簡述·····················

12、;··················6干燥機(jī)·······························&

13、#183;·······················6 工藝水系統(tǒng)簡介························

14、3;······················7事故漿罐和地坑系統(tǒng)簡介·························

15、3;·············7 控制系統(tǒng)簡介···································&#

16、183;·············7電氣系統(tǒng)簡介···································&

17、#183;·············8第二章 FGD系統(tǒng)的主要特性及規(guī)范·························102.1 FGD裝置主要技術(shù)經(jīng)濟(jì)指標(biāo)和保證值····&#

18、183;·························102.2煙氣系統(tǒng)·······················

19、;·······························112.3 SO2 吸收系統(tǒng)················

20、83;································122.4吸收塔硫銨排出泵規(guī)范···············

21、···························122.5吸收塔攪拌器規(guī)范·····················

22、;·························122.6氧化風(fēng)機(jī)規(guī)范·······················

23、···························132.7預(yù)洗滌塔攪拌器規(guī)范····················

24、3;·······················132.8排空系統(tǒng)規(guī)范·························

25、;·························132.9脫硫脫水系統(tǒng)規(guī)范······················

26、3;·······················143.0干燥系統(tǒng)規(guī)范·························

27、;·························143.1工藝水系統(tǒng)規(guī)范·······················

28、;·························153.2液氨供給系統(tǒng)規(guī)范······················

29、3;·······················15第三章 FGD聯(lián)鎖保護(hù)························

30、83;················163.1 FGD裝置聯(lián)鎖保護(hù)項(xiàng)目······························

31、3;···········163.2氨區(qū)儀表設(shè)定值清單····································&#

32、183;·······16第四章 煙氣系統(tǒng)········································

33、3;····214.1煙氣系統(tǒng)的檢查、啟動、停止及注意事項(xiàng)····························214.1.1 啟動前應(yīng)具備條件···········&

34、#183;·······························21煙氣系統(tǒng)啟動前的檢查················&

35、#183;······················214.1.3煙氣系統(tǒng)啟動順序························

36、3;··················214.1.4煙氣系統(tǒng)的檢查項(xiàng)目·····························

37、············204.1.5煙氣系統(tǒng)運(yùn)行中的注意事項(xiàng)···································

38、;204.1.6煙氣系統(tǒng)停止順序···········································204.1.7煙氣系統(tǒng)停運(yùn)后的注意事項(xiàng)·&

39、#183;·································204.2增壓風(fēng)機(jī)的檢查、啟動、停止及注意事項(xiàng)············&#

40、183;·················224.2.1增壓風(fēng)機(jī)啟動前應(yīng)具備的條件·····························

41、····224.2.2增壓風(fēng)機(jī)啟動前的檢查·······································23增壓風(fēng)機(jī)子組啟動順序··&

42、#183;····································23增壓風(fēng)機(jī)運(yùn)行中的檢查項(xiàng)目···········

43、;························24增壓風(fēng)機(jī)運(yùn)行中的注意事項(xiàng)·······················

44、83;···········24增壓風(fēng)機(jī)停止順序·····································

45、;······24增壓風(fēng)機(jī)停運(yùn)后應(yīng)注意的事項(xiàng)·································24第五章預(yù)洗滌塔系統(tǒng)······

46、83;···································255.1預(yù)洗滌塔系統(tǒng)的檢查、啟動、停止及注意事項(xiàng)··········&#

47、183;···········255.1.1啟動前的系統(tǒng)檢查····································

48、;·······255.1.2啟動順序·········································

49、··········255.1.3預(yù)洗滌塔系統(tǒng)的檢查項(xiàng)目·····································

50、255.1.4預(yù)洗滌塔運(yùn)行中的注意事項(xiàng)···································26 預(yù)洗滌塔系統(tǒng)停止··········

51、·································26第六章 吸收塔系統(tǒng)···············&

52、#183;···························266.1吸收塔系統(tǒng)的檢查、啟動、停止及注意事項(xiàng)··················&

53、#183;·······26啟動前的系統(tǒng)檢查········································

54、83;··26吸收塔啟動順序·············································26吸收塔系

55、統(tǒng)的檢查項(xiàng)目·······································27吸收塔運(yùn)行中的注意事項(xiàng)········

56、;·····························27吸收塔停止順序···················&#

57、183;·························286.2循環(huán)泵的檢查、啟動、停止與注意事項(xiàng)····················

58、3;········28啟動前的檢查········································&#

59、183;······28循環(huán)泵啟動順序··········································

60、;···28 循環(huán)泵運(yùn)行中的注意事項(xiàng)·····································29停止順序······

61、83;············································29循環(huán)泵停運(yùn)后的注意事項(xiàng)···&#

62、183;·································296.3氧化風(fēng)機(jī)的檢查、啟動、停止與注意事項(xiàng)············

63、83;··············29啟動前的檢查··································&

64、#183;············29氧化風(fēng)機(jī)啟動步驟···································

65、83;·······30氧化風(fēng)機(jī)運(yùn)行中的注意事項(xiàng)···································30氧化風(fēng)機(jī)停止步驟及氧化風(fēng)機(jī)停運(yùn)后的注意事項(xiàng)·&#

66、183;···············30氧化風(fēng)機(jī)停運(yùn)后的注意事項(xiàng)································

67、···306.4除器的啟動、停止與注意事項(xiàng)·····································30除霧器沖洗啟動程控步序·····

68、;································30除霧器系統(tǒng)運(yùn)行中的注意事項(xiàng)···············&#

69、183;·················31除霧器沖洗停止程控步序······························&

70、#183;······316.5一級除霧器沖洗的啟動、停止·····································31一級除霧器沖洗啟動程控步序

71、3;································316.6硫銨漿液排出泵的檢查、啟動、停止與注意事項(xiàng)·············&#

72、183;········31硫銨漿液排出泵啟動前的檢查·································31硫銨漿液排出泵啟動順序···

73、3;·································32硫銨漿液排出泵運(yùn)行中的注意事項(xiàng)··············

74、;···············32硫銨漿液排出泵停止順序································

75、3;····32硫銨漿液排出泵停運(yùn)后的注意事項(xiàng)·····························326.7pH計(jì)沖洗的啟動、停止···········&

76、#183;·······························33啟動順序·················&

77、#183;·································33停止順序···············&

78、#183;···································33第七章 液氨存儲及供給系統(tǒng)···········

79、3;···············337.1液氨轉(zhuǎn)動設(shè)備的啟停及注意事項(xiàng)卸料壓縮機(jī)啟停及注意事項(xiàng)·····························

80、83;··········37 液氨泵啟停及注意事項(xiàng)·····································&#

81、183;······38廢水泵啟停及注意事項(xiàng)·········································&#

82、183;· 397.2系統(tǒng)啟動試運(yùn)前閥門位置·············································

83、83;·397.3系統(tǒng)啟動前應(yīng)具備的條件········································ 457.4卸氨前的氮?dú)庵脫Q···

84、83;···········································457.4. 1首次卸氨前氮?dú)庵脫Q···

85、3;···············································457.5首次卸氨或檢修后卸氨操

86、作步驟···································467.6液氨儲罐間的倒罐操作步驟···········

87、3;···························497.7液氨蒸發(fā)及送氨管路進(jìn)氨前進(jìn)行氮?dú)庵脫Q···················

88、;·········507.8蒸發(fā)器投運(yùn)、停運(yùn)步驟······································&#

89、183;·····517.9氨區(qū)設(shè)備運(yùn)行維護(hù)及檢查·········································52第八

90、章 工藝水系統(tǒng)··········································408.1工藝水系統(tǒng)的檢查、啟動、停止及注意事項(xiàng)···

91、;·······················40工藝水系統(tǒng)啟動前的檢查························

92、3;············40工藝水系統(tǒng)啟動順序····································

93、;·····40工藝水系統(tǒng)的檢查項(xiàng)目·······································40工藝水系統(tǒng)運(yùn)行中的注意事項(xiàng)·&#

94、183;·······························41工藝水系統(tǒng)停止順序················

95、83;························41工藝水系統(tǒng)停運(yùn)注意事項(xiàng)·······················&#

96、183;·············41第九章 事故漿罐··································

97、3;··········419.1啟動前的檢查······································

98、;············419.2事故漿液泵啟動····································

99、;············419.3事故漿液泵停止····································

100、;············41第十章 硫銨脫水系統(tǒng)····································

101、;··4210.1 旋流器··············································&

102、#183;········42 設(shè)備安裝········································

103、··········42 設(shè)備調(diào)試·······································

104、;···········42 設(shè)備操作、故障診斷與維護(hù)··································4310.2 離心機(jī)

105、3;·················································

106、3;····44安裝時注意事項(xiàng)············································4

107、4 操作與使用················································44 離心

108、機(jī)的維護(hù)與保養(yǎng)········································47 常見故障和排除方法·······

109、;·································4910.3干燥機(jī)···············&#

110、183;·······································51 生產(chǎn)操作前的準(zhǔn)備工作········&

111、#183;·····························51 干燥機(jī)的啟動、運(yùn)行··················&

112、#183;······················52 停機(jī)操作及停機(jī)順序·························&

113、#183;··············52 緊急停機(jī)··································

114、················52 主機(jī)保養(yǎng)維修································

115、83;·············52 事故分析及解決措施··································

116、83;·····5210.4 包裝機(jī)···········································

117、;············53 操作使用方法····································&#

118、183;·········53 常見故障及維修······································

119、3;·····54第十一章 FGD整套裝置啟動與停止·························5511.1 FGD整套啟動前條件·············

120、3;·····························5511.2 整套啟動前的檢查··················&

121、#183;·························5611.3 整套啟動程序······················

122、························5611.4、FGD裝置的停止程序·······················&

123、#183;···················57第十二章 轉(zhuǎn)動機(jī)械的運(yùn)行····························

124、;·······5812.1轉(zhuǎn)動機(jī)械啟動前的檢查········································&

125、#183;5812.2轉(zhuǎn)動機(jī)械的運(yùn)行和維護(hù)·········································5812.3電動機(jī)的運(yùn)行···

126、83;·············································58電動機(jī)啟動前的檢查··

127、3;·····································59電動機(jī)的運(yùn)行和維護(hù)···········

128、;·····························59電動機(jī)啟動間隔時間···················

129、·····················59第十三章 FGD系統(tǒng)的運(yùn)行和維護(hù)··························

130、5913.1總則················································

131、3;········5913.2 FGD運(yùn)行維護(hù)·······································&#

132、183;·········6013.3 FGD輔機(jī)的運(yùn)行符合規(guī)定·····································&

133、#183;·6013.4在下列情況下必須緊急停機(jī)·····································6013.5FGD各系統(tǒng)運(yùn)行注意事項(xiàng)·····&

134、#183;·································6113.6 冬季脫硫系統(tǒng)運(yùn)行注意事項(xiàng)及防凍措施············&

135、#183;··············62第十四章 脫硫系統(tǒng)緊停條件及設(shè)備異常、故障處理······6314.1 事故處理原則·······················

136、;··························6314.2 脫硫系統(tǒng)綜合保護(hù)動作處理····················

137、3;················6314.3 發(fā)生下列情況之一時，將緊急停運(yùn)脫硫裝置························6414.4 脫硫裝置緊急停運(yùn)操作程序規(guī)定··

138、;·······························6414.5 煙氣系統(tǒng)·················

139、····································6414.6 吸收塔系統(tǒng)············

140、·······································6514.7 運(yùn)行中發(fā)現(xiàn)下列情況，應(yīng)立即停止電動機(jī)運(yùn)行······

141、83;···············6514.8 發(fā)生火災(zāi)時的處理································

142、·············6614.9 增壓風(fēng)機(jī)故障的現(xiàn)象、原因及處理································6614.10循

143、環(huán)泵全停的現(xiàn)象、原因及處理·································6714.11 工藝水中斷的現(xiàn)象、原因及處理···········&

144、#183;·····················6714.12 鍋爐排煙SO2濃度超出FGD系統(tǒng)允許值的現(xiàn)象、原因及處理········6814.13 380v電源中斷處理···········&

145、#183;································6814.14 儀用空氣系統(tǒng)故障的處理··············

146、························6914.15轉(zhuǎn)動機(jī)械的故障處理·······················&#

147、183;··················7014.16液氨泄露的事故處理····························

148、3;············· 81第一章 系統(tǒng)概述及設(shè)備簡介1.1 脫硫系統(tǒng)概述國電宿遷熱電有限公司2×135MW機(jī)組煙氣脫硫工程由北京國電龍?jiān)喘h(huán)保工程有限公司以特許經(jīng)營的方式建設(shè)，南京龍?jiān)喘h(huán)保有限公司負(fù)責(zé)本項(xiàng)目的施工，設(shè)計(jì)由雙方共同完成。國電宿遷熱電有限公司位于宿遷市南偏東距市中心14km處，京杭大運(yùn)河南岸，洋北鎮(zhèn)西側(cè)，距洋北鎮(zhèn)中心1.5km。廠址位于城市規(guī)劃區(qū)之外，北側(cè)為徐莊及京杭大運(yùn)河南岸大堤和河灘，南靠宿遷至洋北鎮(zhèn)的公路，西側(cè)靠近蔡溝村，東側(cè)隔灌

149、溉排洪渠為趙莊。本工程項(xiàng)目是為機(jī)組配備一套氨法脫硫工藝系統(tǒng)，兩爐一塔配置，不設(shè)換熱器，凈煙氣從塔頂煙囪（直徑5米，高度90m）排放，脫硫率不低于95。工藝系統(tǒng)主要包括：液氨儲運(yùn)系統(tǒng)、煙氣系統(tǒng)、二氧化硫吸收系統(tǒng)、工藝水系統(tǒng)、硫銨脫水系統(tǒng)等，按2×135MW燃煤機(jī)組在BMCR 工況下進(jìn)行設(shè)計(jì)。1.2脫硫系統(tǒng)工作原理鍋爐來高溫?zé)煔饨?jīng)增壓風(fēng)機(jī)增壓后進(jìn)入預(yù)洗滌塔，經(jīng)洗滌、降溫至50-60后進(jìn)入吸收塔，吸收塔上部布置有三層漿液噴淋層，煙氣自下而上與噴淋液逆流接觸反應(yīng)，生成的NH4SO3 落入吸收塔底部漿池。氧化空氣經(jīng)氧化噴槍注入吸收塔漿池，對中間產(chǎn)物進(jìn)行強(qiáng)制氧化生成脫硫副產(chǎn)品硫銨（NH4）2SO

150、4。經(jīng)吸收劑洗滌脫硫后的凈煙氣，通過除霧器除去大部分水滴后排入大氣。吸收塔循環(huán)液經(jīng)循環(huán)泵輸送至吸收段，與煙氣中的二氧化硫反應(yīng)形成亞硫銨溶液，落入吸收塔漿池后被鼓入的空氣氧化成硫銨溶液。硫銨溶液經(jīng)吸收塔排出泵送入預(yù)洗滌塔，洗滌高溫?zé)煔猓篃煔鉁囟冉档?0-60，經(jīng)濃縮泵循環(huán)噴淋，反復(fù)吸收氧化，最后形成固含量約5%的硫銨溶液去中和箱。在中和箱中加入氣氨和氧化空氣，調(diào)節(jié)pH值到56之間，再經(jīng)硫銨旋流泵送至一級旋流器中進(jìn)行濃縮，使底流固含量提高到20%-30%左右，一級旋流溢流液返回預(yù)洗滌塔。底流進(jìn)入料液箱經(jīng)硫銨料液泵送入二級旋流器中進(jìn)行濃縮，二次分離后二級旋流溢流返回中和箱，底流硫銨漿液固含量約為4

151、0，進(jìn)入離心機(jī)進(jìn)行液固分離，得到的硫銨固體含水率3%的濕物料，經(jīng)螺旋輸送機(jī)直接進(jìn)入干燥機(jī)進(jìn)行干燥，干燥后硫銨含水量在1.0%以下，硫銨成品進(jìn)入料斗，經(jīng)計(jì)量包裝，送入倉庫。1.3脫硫吸收劑及副產(chǎn)品的性質(zhì)脫硫吸收劑的性質(zhì)本工程采用氨氣為脫硫劑，運(yùn)輸和儲存采用液氨。氨的性質(zhì)如下：性狀：氨為無色、有刺激性惡臭氣體。在適當(dāng)壓力下可以液化，同時放出大量的熱量。當(dāng)壓力降低時則汽化，同時吸收周圍大量的熱。氨有毒，空氣中最高允許濃度為30mg/m3。氨蒸汽與空氣混合物的爆炸極限為16-25%（最易引燃濃度17%）。氨極易溶于水（在20水中溶解度34%），氨的水溶液呈堿性，0.1mol/L水溶液的PH值為11.1

152、。理化常數(shù)：分子式：NH3 ， 分子量：17.03 ， 相對密度：0.7714g/l，沸點(diǎn)： -33.5 ， 熔點(diǎn)：-77.7， 自燃點(diǎn)：651 ， 爆炸極限：15.7-27.4%， 蒸汽密度：0.6 ， 最易引燃濃度：17%，產(chǎn)生最大爆炸壓力的濃度：22.5% ， 最大爆炸壓力：0.485MPa，臨界溫度：132.5， 臨界壓力：112.5 大氣壓蒸汽壓：-33.6時為1大氣壓 ；4.70為5個大氣壓、25.7時為10個大氣壓、50.1為20大氣壓。危險(xiǎn)特性：氨氣外逸會危及人畜健康與生命。遇水則變?yōu)橛懈g性的氨水，盛裝在密閉容器內(nèi)受熱后壓力增大，空氣中氨濃度達(dá)15.7-27.4%時，遇火星會

153、引起爆炸。有油類存在時，會增加燃燒危險(xiǎn)，氣態(tài)氨有強(qiáng)烈的刺激氣味，低濃度的氨對眼睛及上呼吸道粘膜有刺激作用，高濃度的氨可引起水腫甚至窒息昏迷。操作時，應(yīng)注意安全生產(chǎn)。侵入途徑：氨主要經(jīng)呼吸道吸入。對粘膜和皮膚有堿性刺激及腐蝕作用，可造成組織溶解性壞死。高濃度時可引起反射性呼吸停止和心臟停搏。臨床表現(xiàn)：急性中毒：短期內(nèi)吸入大量氨氣后可出現(xiàn)流淚、咽痛、聲音嘶啞、咳嗽、痰帶血絲、胸悶、呼吸困難，可伴有頭暈、頭痛、惡心、嘔吐、乏力等，可出現(xiàn)紫紺、眼結(jié)膜及咽部充血及水腫、呼吸率快、肺部羅音等。嚴(yán)重者可發(fā)生肺水腫、急性呼吸窘迫綜合癥，喉水腫痙攣或支氣管粘膜脫落致窒息，還可并發(fā)氣胸、縱膈氣腫、胸部X線檢查呈支

154、氣管炎、支氣管周圍炎、肺炎或肺水腫表現(xiàn)。血?dú)夥治鍪緞用}血氧分壓降低。眼接觸液氨或高濃度氨氣可引起灼傷，嚴(yán)重者可發(fā)生角膜穿孔。皮膚接觸液氨可致灼傷。中毒處理：吸入者應(yīng)迅速脫離現(xiàn)場，至空氣新鮮處，維持呼吸功能。臥床靜息。及時觀察血?dú)夥治黾靶夭縓線片變化。給對癥、支持治療。誤服者給飲牛奶，有腐蝕癥狀時忌洗胃。眼污染后立即用流動清水或涼開水沖洗至少10分鐘。皮膚污染時立即脫去污染的衣著，用流動清水沖洗至少30分鐘。本工程用液氨和氨氣，要注意日常安全檢查，防患于未然。脫硫副產(chǎn)品的性質(zhì)本工藝的脫硫產(chǎn)品為硫酸銨，其性質(zhì)如下：硫酸銨為無色晶體，分子量M=132.13，密度P=1769Kg/m3,熔點(diǎn)mp=23

155、5.硫銨飽和溶液的性質(zhì)：沸點(diǎn)bp=108.9;硫酸銨的溶解度：溫度2030406080100溶解度g/100g水75.4078.081.088.095.3103.3可見，硫銨的溶解度隨溫度略有增加，但變化很小，因此硫銨結(jié)晶都以蒸發(fā)結(jié)晶、飽和結(jié)晶為主，較少采用降溫結(jié)晶的辦法。硫酸銨產(chǎn)品標(biāo)準(zhǔn)：GB535-95項(xiàng)目指 標(biāo) %優(yōu)等品一等品合格品外觀白色結(jié)晶，無可見機(jī)械雜質(zhì)無可見機(jī)械雜質(zhì)氮(N)含量(以干基計(jì))21.021.020.5水分（H2O） 0.20.31.0游離酸（H2SO4）0.030.050.2鐵(Fe)含量 0.007-砷（As）含量 0.00005-重金屬（以Pb計(jì)）含量 0.005-

156、水不溶物含量 0.01-注： 硫酸銨作農(nóng)業(yè)用時可不檢驗(yàn)鐵、砷、重金屬和不溶物含量等指標(biāo)。100%純度的硫銨的N含量21.2%，因此20.5%N含量相當(dāng)于硫銨純度為96.6%。1.4工藝系統(tǒng)主要包括：（1） 煙氣系統(tǒng)；（2） 預(yù)洗滌塔系統(tǒng)；（3） 吸收塔系統(tǒng)；（4） 工藝水供水系統(tǒng)；（5） 硫銨脫水系統(tǒng)（含硫銨干燥、包裝系統(tǒng)）；（6） 吸收劑（液氨）存儲、氣氨供應(yīng)系統(tǒng)；（7） 電氣、熱工控制系統(tǒng)（8） 其它（蒸汽系統(tǒng)、壓縮空氣系統(tǒng)、排放系統(tǒng)、取樣系統(tǒng)等）。主要化學(xué)反應(yīng)式如下：吸收反應(yīng)：SO2+H2O+XNH3=(NH4)XH2-X SO3氧化反應(yīng)：(NH4)XH2-XSO3+1/2O2 +(2-

157、X)NH3=(NH4)2SO4 1.5脫硫系統(tǒng)簡介1.5.1 煙氣系統(tǒng)簡介脫硫煙氣系統(tǒng)的主要作用是進(jìn)行脫硫裝置的投入和切除，為脫硫運(yùn)行提供煙氣通道。煙氣系統(tǒng)包括以下設(shè)備及其系統(tǒng)：煙道、原煙氣擋板門、出口煙氣擋板門、旁路擋板門、擋板門密封風(fēng)系統(tǒng)、增壓風(fēng)機(jī)及其輔助系統(tǒng)，非金屬補(bǔ)償器、預(yù)洗滌、脫硫塔。 當(dāng)脫硫系統(tǒng)停運(yùn)時，來自鍋爐吸風(fēng)機(jī)出口的煙氣，通過在吸風(fēng)機(jī)出口與煙囪之間的煙道上設(shè)置的旁路擋板門直接進(jìn)入煙囪。當(dāng)脫硫裝置運(yùn)行時，脫硫裝置原煙氣擋板門、增壓風(fēng)機(jī)出口煙氣擋板門打開，煙道旁路擋板門關(guān)閉，煙氣引入脫硫系統(tǒng)。煙氣經(jīng)過增壓風(fēng)機(jī)增壓進(jìn)入預(yù)洗滌塔降溫后進(jìn)入吸收塔，從吸收塔出來的凈煙氣進(jìn)入大氣。在正常運(yùn)行的情況下，煙氣系統(tǒng)將鍋爐燃燒產(chǎn)生的煙氣引入脫硫系統(tǒng)，在故障情況下，煙氣系統(tǒng)則將煙氣直接導(dǎo)入旁路煙道進(jìn)入煙囪，避免對脫硫系統(tǒng)造成損壞。為了克服脫硫裝置阻力，在脫硫系統(tǒng)上游熱端設(shè)置了一臺軸流式靜葉可調(diào)增壓風(fēng)機(jī)。預(yù)洗滌塔、吸收塔系統(tǒng)簡介煙氣經(jīng)增壓風(fēng)機(jī)進(jìn)入預(yù)洗滌塔，經(jīng)洗滌、降溫至50-60后進(jìn)入吸 收塔煙氣自下而上與噴淋液逆流接觸反應(yīng)，生成的NH4SO3 落入吸收塔底部漿池。為氧化吸收塔漿池內(nèi)的亞硫酸氨，設(shè)置了氧化空氣系統(tǒng)，本脫硫系統(tǒng)配有三臺氧化風(fēng)機(jī)。氧化空氣經(jīng)氧化噴槍注入吸收塔漿池，對中間產(chǎn)物進(jìn)行強(qiáng)制氧化生成脫硫副產(chǎn)品硫銨（NH4）2SO4。經(jīng)吸收劑洗滌脫硫后的凈煙氣，通過除霧器除去大部分水滴后