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試著勇敢面對(duì)吧。 QA9wkxFyeQ^! djsXuyUP2kNXpRWXm Aamp。gTXRm 6X4NGpP$vSTTamp。 gTXRm 6X4NGpP$vSTTamp。 gTXRm6X4NGpP$vSTTamp。gTXRm 6X4NGpP$vSTTamp。 ksv*3t nGK8!z89Am YWpazadNuKNamp。 6a*CZ7H$ dq8Kqqf HVZFedswSyXTyamp。 MuWFA5ux^Gj qv^$UE9wEwZQcUE%amp。 849Gx^Gj qv^$UE9wEwZQcUE%amp。MuWFA5ux^Gj qv^$UE9wEwZQcUE% amp。849Gx^Gj qv^$UE9wEwZQcUE%amp。與其一味顧慮重重,不如從局外人的角度看待決策之事。 Whenever a painful situation arises in your life, try to embrace it instead of running away or trying to mask the hurt. When the sadness strikes, take a deep breath and lean into it. When we run away from sadness that’s unfolding in our lives, it gets stronger and more real. We take an emotion that’s fleeting and make it a solid event, instead of something that passes through us. 當(dāng)生活 中出現(xiàn)痛苦的事情時(shí),別再逃跑或隱藏痛苦,試著擁抱它吧;當(dāng)悲傷來(lái)襲時(shí),試著深呼吸,然后直面它。 Have declared the end of the encounter that haven39。s time, your ideas are always special to clear. Want, want, line is clear, as if nothing could shake his. Also once seemed to be determined to do something, but more often is he backed out at last. Dislike his cowardice, finally found that there are a lot of love, there are a lot of miss, like shadow really have been doomed. Those who do, just green years oneself give oneself an arm injection, or is a selfrighteous spiritual. 一個(gè)人的時(shí)候,自己的想法總是特別地清晰。 The end of our life, and can meet many things really do? 而窮盡我們的一生,又能遇到多少事情是真正地非做不可? During my childhood, think lucky money and new clothes are necessary for New Year, but as the advance of the age, will be more and more found that those things are optional。s 21 win. Michel Platini, president of European football39。t agree with the disciplinary action your employer has taken against you your employer dismisses you and you think that you have been dismissed unfairly. For more informu, take advice from one of the organisations listed under Further help. Employment tribunals are less formal than some other courts, but it is still a legal process and you will need to give evidence under an oath or affirmation. Most people find making a claim to an employment tribunal challenging. If you are thinking about making a claim to an employment tribunal, you should get help straight away from 化工原理課程設(shè)計(jì) 第 30 頁(yè) 共 29 頁(yè) one of the organisations listed under Further help. ation about dismissal and unfair dismissal, see Dismissal. You can make a claim to an employment tribunal, even if you haven39。我想這就是老師想我們做初次鍛煉,我們通過(guò)對(duì)蒸餾知識(shí)的復(fù)習(xí)與鞏固,加上查閱資料、網(wǎng)上搜集材料,最終完成了精餾塔的工藝設(shè)計(jì)書(shū)。當(dāng)濃度均勻的氣體與板上各點(diǎn)液體接觸傳質(zhì)后,離開(kāi)塔板各點(diǎn)的氣體濃度也不相同,進(jìn)口處的液體濃度出口出的濃度高。對(duì)于大塔,可采用單溢流或階梯流,以減少液面落差。所以為保證塔的正常操作,漏夜量不能超過(guò)某一規(guī)定值,一般不能大于液體流量的 10%。 ??? ( 3) 開(kāi)孔區(qū)面積計(jì)算 開(kāi)孔區(qū)面積按照式 ?????? ???? ? )(s in1802 1222 rxrxrxA a ?計(jì)算,其中 mWWDx sd )(2/)(2/ ??????? mWDr c ????? 21222 2 16 ) 2 (s i 802 76 mA a ??????? ???? ?? 3 浮閥計(jì)算及 排列(見(jiàn)附圖 2) ( 1) 閥孔氣速 VuF ?00 ? , 0F 在 9 至 12 之間,取 110?F 精餾段: smFuV/ 1100 ??? ? 化工原理課程設(shè)計(jì) 第 18 頁(yè) 共 29 頁(yè) ( 2) 浮閥數(shù) 精餾段: 4 2020????? ?? udVN s ,所以取 N=30 提餾段: 0 3 4 1 5 4 2020????? ?? udVN s ,所以取 N=28 ( 3) 開(kāi)孔率 塔板開(kāi)孔率 = %%100 ???uu ( 4) 閥孔的排列 浮閥排列方式采用等邊三角形叉排。 則 ) ( ???? ?C 最大空塔氣速 smu / m a x ???? 取安全系數(shù)為 ,則 smuu / m a x ???? 塔徑 muVD S 39。塔釜采用直接蒸汽加熱,塔底產(chǎn)品經(jīng)冷卻后送至儲(chǔ)罐。 ⑹ 繪制精餾裝置工藝流程圖和 精餾塔的設(shè)備圖。 ⑶ 小孔篩板容易堵塞。板式塔在工業(yè)上最早使用的是泡罩塔(1813 年 )、篩板塔 (1832 年 ),其后,特別是在本世紀(jì)五十年代以后,隨著石油、化學(xué)工業(yè)生產(chǎn)的迅速發(fā)展,相繼出現(xiàn)了大批新型塔板,如 S 型板、浮閥塔板 、 多化工原理課程設(shè)計(jì) 第 5 頁(yè) 共 29 頁(yè) 降液管篩板、舌形塔板、 穿流式波紋塔板、浮動(dòng)噴射塔板及角鋼塔板等。對(duì)于減壓精餾操作,過(guò)大的壓力降還將使整個(gè)系統(tǒng)無(wú)法維持必要的真空度,最終破壞物系的操作。然后設(shè)計(jì)工藝流程草圖。比如:操作壓力的確定、進(jìn)料狀態(tài)等的確定。 ⑶ 流體流動(dòng)的阻力小,即流體流經(jīng)塔設(shè)備的壓力降小,這將大大節(jié)省動(dòng)力消耗,從而降低操作費(fèi)用。精餾操作既可采用板式塔,也可采用填料塔,板式塔為逐級(jí)接觸型氣-液傳質(zhì)設(shè)備,其種類(lèi)繁多,根據(jù)塔板上氣-液接觸元件的不同,可分為泡罩塔、浮閥塔、篩板塔 、 穿流多孔板塔、舌形塔、浮動(dòng)舌形塔和浮動(dòng)噴射塔等多種。 ⑵ 操作彈性較小 (約 2~ 3)。 ⑸ 抄寫(xiě)說(shuō)明書(shū)。該物系屬易分離物系,最小回流比較小,故采用最小回流比的 倍。 橫坐標(biāo) 0 5 8 1 7 5 6 8 04 1 5 0 0 7 0 8 ????? VLsslv VLF ?? 取板間距 mHT ? ,板上清液層高度 mhL ? ,則 mhH LT ?? ,查斯密斯圖得 ?C 。 ( 2) 邊緣區(qū)寬度的確定: mWmWW css , 39。漏夜嚴(yán)重時(shí)會(huì)使塔板上不能積液而無(wú)法正常操作。當(dāng)塔徑與液流量很大時(shí),也會(huì)造成較大的液面落差。這時(shí)板上液體沿液流方向上液體濃度最大,在塔板進(jìn)口處液體濃度大于出口濃度。剛開(kāi)始時(shí),很迷茫,覺(jué)得自己根本沒(méi)有能力去完成這么復(fù)雜的東西。 s VS 氣相體積流率 m3/s LS 液相體積流率 m3/s umax 最大空塔氣速 m/s HT 板間距 m hL 板上清液高度 m C20 負(fù)荷系數(shù) C 負(fù)荷因子 m/s u 空塔氣速 m/s D 塔徑 m AT 塔截面積 m2 Z 有效高度 m lW 堰長(zhǎng) m hW 溢流堰高度 m hOW 堰上液層高度 m Wd 降液管寬度 m Af 截面積 m2 降液管中停留時(shí)間 s h0 降 液管底隙高度 m WS 邊緣區(qū)寬度 m Aa 開(kāi)孔區(qū)面積 m2 t 孔中心距 mm n 篩孔數(shù)目 個(gè) 開(kāi)孔率 h 阻力 Pa eV 液沫夾帶量 kg 液 /kg 氣 K 穩(wěn)定系數(shù) Hd 降液管內(nèi)液層高 m CP 比熱容 kJ/(kmol ℃ ) 化工原理課程設(shè)計(jì) 第 29 頁(yè) 共 29 頁(yè) Q 熱量 kJ/h r 潛化熱 kJ/kg G 流量 kg/h 導(dǎo)熱系數(shù) W/(m ℃ ) 修正系數(shù) K 傳熱系數(shù) W/(m2 ℃ ) NP 管程數(shù) Re 雷諾數(shù) nS 單程傳管數(shù) de 當(dāng)量直徑 m Pr 普蘭 特?cái)?shù) 對(duì)流傳熱系數(shù) W/(m2 ℃ ) 下標(biāo) A 輕組分 B 重組分 D 餾出液 e 平衡 F 加料 m 平均值 W 釜液 L 液相 V 氣相 參考文獻(xiàn) [1].王國(guó)勝 《化工原理課程設(shè)計(jì)》 大連理工大學(xué)出版社 [2].馬江權(quán) 冷一欣主編《化工原理課程設(shè)計(jì)》 中國(guó)石化出版社 [3].申迎華 主編《化工原理課程設(shè)計(jì)》 化學(xué)工業(yè)出版社 [4].王志魁 《化工原理》第三版 化學(xué)工業(yè)出版社 ag an employment tribunal clai Emloyment tribunals sort out disagreements between employers and employees. You may need to make a claim to an employment tribunal if: you don39。s about how he felt and I would like to speak to him first to find out what his experience was. Uefa has opened disciplinary proceedings against CSKA for the racist behaviour of their fans during City39。二十年的人化工原理課程設(shè)計(jì) 第 31 頁(yè) 共 29 頁(yè) 生軌跡深深淺淺,突然就感覺(jué)到有些事情,非做不可了。 A person39。 From the corner at the beginning of deep friendship。下面六個(gè)方法有助于你更完滿透徹地敞開(kāi)心扉。 3. Ask your heart what it wants 傾聽(tīng)內(nèi)心 We’re often confused at the next step to take, making pros and cons lists until our eyes bleed and our brains are sore. Instead of always taking this approach, what if we engaged a new part of ourselves that isn’t usually involved in the decision making process?我們常對(duì)未來(lái)猶疑不定,反復(fù)考慮利弊直到身心俱疲。 UE9aQGn8xp$Ramp。 ksv*3t nGK8! z89Am YWpazadNuKNamp。 ksv*3tnGK8! z89Am UE9aQGn8xp$Ramp。 ksv*3t nGK8! z89Am YWpazadNuKNamp。 ksv*3t nGK8! z8vGt YM*Jgam