【正文】 Lesson74 Out of the limelight 舞臺之外Little boys who play truant from school are unimaginative. A quiet day39。s son, Donald, also set up a world record. Like his father, he was driving a car called Bluebird. his father39。Lesson72 A car called Bluebird “藍(lán)鳥”汽車Lesson71 A famous clock 一個著名的大鐘 Red for danger 危險的紅色 he said, in a mournful voice,39。 I continued driving and after some time, the examiner tapped loudly. Though the sound could be heard clearly, it took me a long time to react. I suddenly pressed the brake pedal hard and we were both thrown forward. The examiner looked at me sadly. 39。I was being tested for a driving licence for the third time. I had been asked to drive in heavy traffic and had done so successfully. After having been instructed to drive out of town, I began to acquire confidence. Sure that I had passed, I was almost beginning to enjoy my test. The examiner must have been pleased with my performance, for he smiled and said, 39。s always plenty to read in the 39。 he answered.39。 Then I39。but I39?！?Not at all,39。Would you mind my ing with you ?39。 I39。 No, not at all,39。 I was just wondering how to spend the morninguntil I saw you. You39。Hullo, Elizabeth,39。 I said. 39。39。Lesson68 Persistent 糾纏不休Haroun Tazieff the Polish scientist, has spent his lifetime studying active volcanoes and deep caves in all parts of the world. In 1948, he went to lake Kivu in the Congo to observe a new volcano which he later named Kituro. Tazieff was able to set up his camp very close to the volcano while it was erupting violently. Though he managed to take a number of brilliant photographs, he could not stay near the volcano for very long. He noticed that a river of liquid rock was ing towards him. It threatened to surround him pletely, but Tazieff managed to escape just in time. He waited until the volcano became quiet and he was able to return two days later. This time, he managed to climb into the mouth of Kituro so that he could take photographsThe Hatheld Puffin is a modern aeroplane, but its designer, Mr John Wimpenny, is finding it difficult to get it off the ground. The reason for this is that this plane is also a bicycle. Its pilot has to pedal hard to get it into the air. After Mr Wimpenny had the plane built, it was tested thoroughly. In 1961, it was the first manpowered aircraft to fly half a mile. While being flown by a champion amateur cyclist in 1963, the plane crashed on an airfield. Since then, Mr Wimpenny has had it rebuilt. He has had the length of the wings increased so that they now measure 93 feetalmost as long as those of a Dakota. Many people have shown interest in this new and unusual sport. But though air cyclists may learn how to fly over short distances, and may, eventually, even get across the English Channel, it is doubtful whether they will ever cycle across the Atlantic.so it was fortunate that we didn39。Jumbo must weigh a few tons,39。guard of honour39。Last Christmas, the circus owner, Jimmy Gates, decided to take some presents to a children39。7. 設(shè)備及造價、性能、工作量清單 主要設(shè)備清單及造價估算序號名 稱金 額（元）說 明1污泥焚燒爐及輔機(jī)450000設(shè)計后定制制：蒸發(fā)量為3t/h，2熱干化系統(tǒng)及輔機(jī)1200000設(shè)計后自制3主換熱器50000設(shè)計后定制，換熱面積1000m24造粒機(jī)350000設(shè)計后自制5混捏機(jī)140000配套6濕污泥倉70000設(shè)計后自制7干粉倉40000設(shè)計后自制8濕污泥給料機(jī)80000配套9干粉給料機(jī)20000配套10混泥輸送機(jī)30000配套11循環(huán)風(fēng)機(jī)30000配套、消音器、變頻器12干污泥顆粒輸送機(jī)20000配套13干污泥顆粒倉40000設(shè)計后自制14尾氣二次風(fēng)噴口20000設(shè)計后自制15測溫系統(tǒng)40000配套16操作臺20000設(shè)計后定制17煙塵在線監(jiān)測儀200000合 計2800000 性能清單序號名 稱說 明1濕污泥處理能力40噸/日2石灰渣處理量1噸/日3耗汽，設(shè)計汽壓8bar，最低汽壓5 bar4稻殼粉消耗～（取決于干粉配比）5熱干化污泥產(chǎn)量～（取決于干粉配比）6產(chǎn)汽～（取決于干粉配比）7電耗每噸濕污泥消耗約30度電（取決于干粉配比與鍋爐負(fù)荷） 工作量清單序號名 稱說 明1方案設(shè)計已完成，待討論、批準(zhǔn)2工程設(shè)計項目確定后30個工作日3施工設(shè)計工程設(shè)計完成后30個工作日4設(shè)備制造工程設(shè)計完成后60個工作日5安裝調(diào)試50個工作日26Englishman, William Low. He suggested that a double railway tunnel should be built. This would solve the problem of ventilation, for if a train entered this tunnel, it would draw in fresh air behind it. Fortytwo years later a tunnel was actually begun. If, at the time, the British had not feared invasion, it would have been pleted. Recently, there has again been great interest in the idea of a Channel Tunnel. If it is built, it will connect Britain to Europe for the first time in history. 惡臭煙氣惡臭問題在解決二噁英問題的同時得以解決。關(guān)鍵問題是這種設(shè)計能否滿足二噁英的分解條件。這樣的配置以換熱器的設(shè)計來保證：在本項目中，特殊設(shè)計了循環(huán)風(fēng)系統(tǒng)的結(jié)構(gòu)和換熱器的的結(jié)構(gòu)，并且換熱器的換熱面積高達(dá)1000m2。 設(shè)備安全污泥熱干化的另外一個特別重要的核心問題是防止干燥劑發(fā)生爆炸事故。實驗室中，以稻殼粉為干粉，與中國宣紙集團(tuán)公司的提供的中水污泥的鮮污泥樣品混捏，結(jié)果表明比使用干污泥回流的防粘結(jié)性能更好。目前常見的技術(shù)手段是采用干污泥回流，這需要設(shè)置回流干泥的粉碎和輸送系統(tǒng)，對于本項目而言，處理量很小的條件下，配置干污泥回流系統(tǒng)不僅是系統(tǒng)復(fù)雜化增加初投資的問題，也嚴(yán)重影響到日常運行管理和系統(tǒng)的可靠性。 過程說明 尾氣尾氣作為鍋爐的二次風(fēng)使用，所含有害組分在爐膛內(nèi)完成分解和燃燒，是專利技術(shù)的一大特色，這樣的設(shè)計，節(jié)省了大量的乏氣凈化設(shè)備的投資，熱干化的總投資和運行費用都下降了一半以上，而且不會形成二次污染。 廉價的焚燒工藝熱干化后的“生物質(zhì)—污泥”顆粒直接在污泥焚燒鍋爐鏈條爐排上完成燃燒過程，具有燃燒溫度高（1200℃以上的火床燃燒溫度和1300℃以上的爐膛火焰中心溫度）、飛灰份額?。ㄐ∮?％，在所有的燃燒方式中具有最小的飛灰份額）等特殊優(yōu)點，有效的控制了二噁英和重金屬的排放，徹底做到了污泥處置無害化，大幅度降低了煙氣凈化系統(tǒng)投資及運營成本。 高效安全的熱干化工藝開發(fā)了過熱蒸汽干燥技術(shù)，惰性干燥劑徹底杜絕了安全隱患，同時以水蒸氣為干燥劑，還能減少傳質(zhì)阻力，極大地加快蒸發(fā)過程，在提高生產(chǎn)率的同時大幅度降低了熱干化成本。熱干化后的中水污泥顆粒可以直接作為污泥焚燒鍋爐的燃料使用，這部分燃料在污泥焚燒鍋爐中產(chǎn)出的飽和蒸汽，可以滿足干化熱源的需求。乏氣直接由乏氣風(fēng)機(jī)排出到污泥焚燒鍋爐爐膛，作為二次風(fēng)使用。對于中國宣紙集團(tuán)公司產(chǎn)出的中水污泥，基于以下兩點理由，該系統(tǒng)在經(jīng)濟(jì)上并不合理：一是污泥量太小，建設(shè)專用焚燒爐的單位處理量的初投資成本太高；二是系統(tǒng)復(fù)雜，對于小處理量而言，運行操作的人工費用不可接受。國內(nèi)有許多在燃煤鍋爐內(nèi)直接摻燒污泥的實施案例都證明了上述結(jié)論。 現(xiàn)有的技術(shù)路線評價目前對污泥進(jìn)行無害化處理，國內(nèi)外的普遍做法有兩類：在燃煤鍋爐內(nèi)摻燒，以及一體化焚燒。6. 中國宣紙集團(tuán)公司中水污泥焚燒系統(tǒng)方案設(shè)計 基礎(chǔ)數(shù)據(jù)中國宣紙集團(tuán)公司產(chǎn)出的中水污泥，經(jīng)過現(xiàn)場勘查、取樣、生產(chǎn)數(shù)據(jù)核實，通過數(shù)據(jù)匯總以及實驗室分析，基礎(chǔ)數(shù)據(jù)如下表：中國宣紙集團(tuán)公司中水污泥基礎(chǔ)數(shù)據(jù)匯總表樣品說明：4種樣品，2008年5月8日取自現(xiàn)場：1＃樣品：鮮濕中水污泥2＃樣品：露天放置1周的中水污泥3＃樣品：風(fēng)干中水污泥4＃樣品：石灰渣 1種樣品，實驗室制?。?＃樣品：由1＃樣品制取的空氣干燥基樣品序號名稱數(shù)據(jù)來源數(shù)據(jù) 11＃樣品含水率實驗室：五個平行試樣平均％22＃樣品含水率實驗室：五個平行試樣平均%33＃樣品含水率實驗室：五個平行試樣平均%45＃樣品：空氣干燥基水分實驗室分析%55＃樣品：空氣干燥基揮發(fā)分實驗室分析%65＃樣品：空氣干燥基灰分實驗室分析％75＃樣品：空氣干燥基低位發(fā)熱量實驗室分析11678kJ/kg85＃樣品：空氣干燥基比熱容實驗室分析 kJ/95＃樣品：空氣干燥基導(dǎo)熱系數(shù)實驗室分析 W/m.℃101＃樣品：表觀粘度實驗室分析 114＃樣品粒度實驗室分析12鮮濕中水污泥：日產(chǎn)量核實的生產(chǎn)