【導讀】連續(xù)操作、中間加料、泡點回流。工藝流程圖和精餾塔裝配圖,編寫設計說明書.的確定、進料狀態(tài)等的確定。根據確定的方案，確。浮閥的流體力學演算、塔板的負荷性能，最后根據計算選擇合適的輔助設備。攔液或液泛等破壞操作的現象。消耗，從而降低操作費用。對于減壓精餾操作，過大的壓力降還將使整個系統(tǒng)無。法維持必要的真空度，最終破壞物系的操作。⑸耐腐蝕和不易堵塞，方便操作、調節(jié)和檢修。抓住主要矛盾，進行選型。板式塔在工業(yè)上最早使用的是泡罩塔。⑵處理能力大，比同塔徑的泡罩塔可增加10～15％。⑷壓降較低，每板壓力比泡罩塔約低30％左右。⑴塔板安裝的水平度要求較高，否則氣液接觸不勻。主要設備型式及其材質的選取等進行論述。⑹繪制精餾裝置工藝流程圖和精餾塔的設備圖。對于二元混合物的分離，應采用連續(xù)精。精餾是指由不同揮發(fā)度的組分所組成的混合液，在精餾塔中同時多次地。進行部分氣化和部分冷凝，使其分離成幾乎純態(tài)組分的過程。塔頂蒸汽冷凝回流

　　

【正文】 ttached, will move through the lower level of the atmosphere (the troposphere) where our daytoday weather lives. It will climb higher than the tip of Mount Everest ( miles/ kilometers), drifting even higher than the cruising altitude of mercial airliners ( miles/ kilometers) and into the stratosphere. As he crosses the boundary layer (called the tropopause),e can expect a lot of turbulence. We often close ourselves off when traumatic events happen in our lives。 instead of letting the world soften us, we let it drive us deeper into ourselves. We try to deflect the hurt and pain by pretending it doesn’t exist, but although we can try this all we want, in the end, we can’t hide from ourselves. We need to learn to open our hearts to the potentials of life and let the world soften us. 生活發(fā)生不幸時，我們常常會關上心門；世界不僅沒能慰藉我們，反倒使我們更加消沉。我們假裝一切仿佛都不曾發(fā)生，以此試圖忘卻傷痛，可就算隱藏得再好，最終也還是騙不了自己。既然如此，何不嘗試打開心門，擁抱生活中的各種可能，讓世界感化我們呢？ Whenever we start to let our fears and seriousness get the best of us, we should take a step back and reevaluate our behavior. The items listed below are six ways you can open your heart more fully and pletely. 當恐懼與焦慮來襲時，我們應該退后一步，重新反思自己的言行。下面六個方法有助于你更完滿透徹地敞開心扉。 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. 當生活 中出現痛苦的事情時，別再逃跑或隱藏痛苦，試著擁抱它吧；當悲傷來襲時，試著深呼吸，然后直面它。如果我們一味逃避生活中的悲傷，悲傷只會變得更強烈更真實 —— 悲傷原本只是稍縱即逝的情緒，我們卻固執(zhí)地耿耿于懷 By utilizing our breath we soften our experiences. If we dam them up, our lives will stagnate, but when we keep them flowing, we allow more newness and greater experiences to 。屏住呼吸，生活停滯；呼出呼吸，更多新奇與經歷又將拉開序幕。 2. Embrace the unfortable We all know what that twinge of anxiety feels like. We know how fear feels in our bodies: the tension in our necks, the tightness in our stomachs, etc. We can practice leaning into these feelings of disfort and let them show us where we need to ，也都感受過恐懼造成的生理反應：脖子僵硬、胃酸翻騰。其實，我們有能力面對這些痛苦的感受，從中領悟到出路。 The initial impulse is to run away — to try and suppress these feelings by not acknowledging them. When we do this, we close ourselves off to the parts of our lives that we need to experience most. The next time you have this feeling of being truly unfortable, do yourself a favor and lean into the feeling. Act in spite of the fear. 我們的第一反應總是逃避 —— 以為否認不安 情緒的存在就能萬事大吉，可這也恰好妨礙了我們經歷最需要的生活體驗。下次感到不安時，不管有多害怕，也請試著勇敢面對吧。 3. Ask your heart what it wants 傾聽內心 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?我們常對未來猶疑不定，反復考慮利弊直到身心俱疲。與其一味顧慮重重，不如從局外人的角度看待決策之事。 From: 化工原理課程設計 第 33 頁 共 29 頁 The supersonic descent could happen as early as Sunda. The weatheThe balloon will slowly drift to the edge of space at 120,000 feet (Then, I would assume, he will slowly step out onto something resembling an Olympic diving platform. Below, the Earth bees the concrete bottom of a swimming pool that he wants to land on, but not too hard. Still, he39。ll be traveling fast, so despite the distance, it will not be like diving into the deep end of a pool. It will be like he is diving into the shallow end. Skydiver preps for the big jump When he jumps, he is expected to reach the speed of sound 690 mph (1,110 kph) in less than 40 seconds. Like hitting the top of the water, he will begin to slow as he approaches the more dense air closer to Earth. But this will not be enough to stop him pletely. If he goes too fast or spins out of control, he has a stabilization parachute that can be deployed to slow him down. His team hopes it39。s not needed. Instead, he plans to deploy his 270squarefoot (25squaremeter) main chute at an altitude of around 5,000 feet (1,524 meters). In order to deploy this chute successfully, he will have to slow to 172 mph (277 kph). He will have a reserve parachute that will open automatically if he loses consciousness at mach speeds. Even if everything goes as planned, it won39。t. 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