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n 1,000 fans from 致謝第 35 頁 (共 32 頁)home and abroad gathered for lessons from 20 leading practitioners of the ancient Indian regimen, from June 1721. Yoga is to India what perhaps tai chi is to China. Many countries other than India and China, also held the first World Yoga Day on June 21, after the United Nations last year agreed to Indian Prime Minister Narendra Modi39。s Pink Revolution, an annual campaign that seeks to raise awareness and funds for breast cancer research, the hotel recently announced. A major sponsor of the campaign for three years in a row, Conrad Macao has pledged to donate a portion of its proceeds to the fund, including those collected from selling its popular bear and rubber duck merchandise, in limited pink editions. Pink is the theme for floral arrangements and decorations in the hotel in October. In addition, on Fridays that month, members of the management and staff will add something pink to their uniforms, regular s and handwritten guest cards. Breast cancer is the most prevalent type of cancer among women in Hong Kong and is also of significant concern in Macao and around the world, regardless of age, general manager Bede Barry said in a statement. The hotel has enlisted the support of a number of international and local celebrities to help drive the cause, including South Korean actor Jung Suk Won. This year, a lucky guest who stays at the hotel during the campaign and also donates money for the cause will win a necklace specially designed by Arte Madrid, a Spanish jewelry brand. Women should strive to balance quality of work and life, and have children at a young age. As a doctor I see much suffering because of this imbalance. Xiao Ying, 36, works for a large law firm. Her job means lots of travel, a heavy caseload and a large number of meetings, so her schedule is hectic. She has been pregnant twice, but had abortions on both occasions because she felt her busy, highpressure career wasn39。s annual National Day for Eye Care, the China Youth Development ServiceCenter and Zhejiang Medicine, a leading listed Chinese pharmaceutical pany, jointlyannounced the kickoff of the about one month, a questionnaire piled by top eye care medical experts in China willbe distributed through multiple online partners, including , as well asthrough offline survey events held in universities, middle schools and primary schools acrossthe report will be released based on the survey statistics and analysis, and most importantly,guidelines for parents and youth on how to care for the eyes and prevent myopia — agrowing problem in China39。正所謂萬事開頭難,通過與同學們的討論,我找到了一種絕處逢生的感覺,有了頭緒和思路之后設(shè)計就顯得水到渠成了。此外,還配有安全裝置、表計及完成不同生產(chǎn)工藝作用的內(nèi)件。由標準橢圓封頭 50 液化石油氣儲罐設(shè)計第 28 頁(共 32 頁) (35)2()iDHh??有 h=HD i / 4=6902600/4=40mm故 A≤(L+2h)=(8500+240)=1716mm由于接管比較多,所以固定支座位于儲罐接管較多的左端。雙鞍座中一個支座為固定支座,另一個鞍座為滑動支座。得對應墊片尺寸如下:圖 9 墊片表 11 墊片尺寸管口名稱 公稱直徑DN(mm)內(nèi)徑D1(mm)外徑D2(mm)厚度δ(mm)液位計口 32 82 3放氣管 80 120 142 3人孔 500 530 575 3安全閥 80 120 142 3排污口 80 120 142 3液相出口 80 120 142 3液相進口 80 120 142 3氣相管 20 61 3壓力表口 20 61 3溫度計口 20 61 350 液化石油氣儲罐設(shè)計第 24 頁(共 32 頁) 螺栓(螺柱)的選擇 根據(jù)密封所需壓緊力大小計算螺栓載荷,選擇合適的螺柱材料。根據(jù)《壓力容器與化工設(shè)備實用手冊》P N= 時,可選接管公稱通徑DN=80mm。?1F?儲罐的安全泄放量為: (25)????安全閥額定排量可按下式計算: (26)doMGCPAXZT?式中:——安全閥的額定排量, kg/h;G——安全閥的排放壓力(絕對) , MPa;dP——安全閥的排氣溫度, K;T——介質(zhì)的分子量, ;M/gmol——安全閥的排氣面積, ;oA2——氣體的特性系數(shù);X8 安全閥和液面計選型第 17 頁 (共 32 頁)已知丙烷的絕熱指數(shù) ,? (27) 1 ()()? ?? ???全啟式安全閥的公稱直徑與流道直徑如下表 所示。53012m?對接管,按 GB/150 標準, , ,則t[]=185aMP?[]=185atP?1%.tntC??? ?[]mi{,}i{,1trf?開孔直徑接管計算厚度 (13)?????????接管有效厚度 (14)????開孔所需要的補強面積 22(1)???(15) 有效補強范圍確定如下有效補強寬度 (16)22(1) m??????外側(cè)有效補強高度 (17)1min{,30}in{,30}??內(nèi)側(cè)有效補強高度 2i,nthd??(1).6[]???50 液化石油氣儲罐設(shè)計第 14 頁(共 32 頁)在有效補強范圍以內(nèi),殼體的多余補強面積為 (18) 1()2()1eet rABdf????? ??在有效補強范圍以內(nèi),接管的多余補強面積為 (19) 2122()()ettrettrAhfhCf????????在有效補強范圍內(nèi),焊縫面積為 (焊縫腰高 取較薄板22314A???的厚度) 。T? (8)()2TiePD????式中: ——試驗壓力下的筒壁周向薄膜應力, ;T? aMP ——試驗壓力, ;PMPa ——圓筒內(nèi)直徑, ;iDm ——圓筒的有效厚度, ;e?水壓試驗下的筒壁周向薄膜應力圓筒的有效厚度 (9) 128016enCm?????50 液化石油氣儲罐設(shè)計第 10 頁(共 32 頁) 所以筒體壁厚滿足水壓試驗時的強度要求。P 靜(max) =ρgh max≤ρgD=580= a 可以忽略不記。.%5e????6 壁厚設(shè)計第 7 頁 (共 32 頁)6 壁厚設(shè)計 各項參數(shù)(1)設(shè)計溫度 T=50℃。因此,不需要設(shè)保溫層。取其大致比例如下:表 1 液化石油氣成分組成成分 異辛烷 乙烷 丙烷 異丁烷正丁烷異戊烷正戊烷乙炔各成分百分比 2對于設(shè)計溫度下各成分的飽和蒸氣壓力如下:表 2 各溫度下各組分的飽和蒸汽壓飽和蒸汽壓力,MPa溫度,℃ 異辛烷乙烷 丙烷 異丁烷 正丁烷 異戊烷 正戊烷 乙炔25 0 020 0 00 0 020 0 050 0 7 設(shè)計溫度 根據(jù)本設(shè)計工藝要求,使用地點為荊州市的室外,用途為液化石油氣儲配站工作溫度為20—48℃,介質(zhì)為易燃易爆的氣體。它適用于小型分配油庫、農(nóng)村油庫、城市加油站、部隊野戰(zhàn)油庫或企業(yè)附屬油庫。液化石油氣貯罐是盛裝液化石油氣的常用設(shè)備, 常溫貯罐一般有兩種形式: 球形貯罐和圓筒形貯罐。大型油罐一般采用屈服強490MPa 級的鋼材。然而,由于液化石油氣具有易燃易爆的特性,熱和明火有燃燒爆炸的危險。本次設(shè)計中綜合考慮經(jīng)濟性、實用性、安全可靠性等。 50 液化石油氣儲罐設(shè)計第 2 頁(共 32 頁)2 選題背景 題目來源:隨著我國經(jīng)濟社會的全面發(fā)展,能源行業(yè)亦面臨著巨大的發(fā)展空間。由于它具有承受較高的正壓和負壓的能力,有利于減少油品的蒸發(fā)損耗,也減少了發(fā)生火災的危險性。3 方案論證 根據(jù)本次設(shè)計的儲罐容量為 50 立方米,而且使用地點問湖北荊州,設(shè)此儲罐在液化石油氣加氣站使用。為保證正常工作,對設(shè)計溫度留一定的富裕量。所以有 Pc= =。根據(jù) GB1501998 表 41,選用筒體材料為低合金鋼 16MnR(鋼材標準為 GB6654)[σ] t=185MPa。而當鋼材的厚度負偏差不大于 ,且不超過名義厚度的6%時,負偏差可以忽略不計,故取 C1=0,C=C 1+C2=2+0 =2。()(601) sPDMPaMa?? ?????????.[]??????7 開孔補強和人孔的設(shè)計第 11 頁 (共 32 頁) 封頭最小壁厚校核:因為: (11) % iCDm??????因此選擇名義厚度為 20mm 的封頭厚度滿足要求。坡口, 時,補強圈50NDm?外徑 ,所以所需要的補強圈的厚度284Dm? ????8 安全閥和液面計選型第 15 頁 (共 32 頁) (21)?????考慮到腐蝕裕量和鋼板厚度負偏差,取補強圈的名義厚度 。查表得液化石油氣在此條件下的壓縮系數(shù)為 。根據(jù)各接管公稱通徑,查表 44 得各法蘭的尺寸。查《鋼制管法蘭、墊