The invention relates to an improved PSA process. The PSA process is provided with at least three adsorption towers, and a heat pump system is arranged in the adsorption tower. The gasification temperature of the working liquid of the heat pump is 35 \u2103 ~ 70 \u2103, wherein when the adsorption tower is in the adsorption process, the adsorbent releases heat, the liquid temperature in the heat pump increases, and the liquid is in the gasification process. Therefore, the adsorbent heat is transmitted to the heat pump to make the adsorption The temperature rise range of the adsorbent meets the process requirements. The gas from the heat pump is automatically sent to the adsorption tower in the desorption state. In the adsorption tower in the desorption state, the adsorbent absorbs heat, and the gas in the heat pump is cooled in the liquefaction process. The heat pump transfers heat to the adsorbent, so that the temperature drop range of the adsorbent meets the process requirements. The PSA process is the process of adsorption and desorption changes, so, The circulation mode of the heat pump is synchronous with the adsorption tower, and the temperature change of the adsorbent bed is less than that of the non heat pump system.
【技术实现步骤摘要】
一种带热泵系统的变压吸附工艺
本专利技术涉及化工、节能、环保领域,是一种有效提高吸附剂效率,减少能量消耗的方法。
技术介绍
对于变压吸附过程,不设立冷却与加热系统,吸附过程,吸附热使吸附剂温升高,不利于吸附剂吸附更多的吸附质,而解吸过程,吸附质吸热,吸附剂温度降低,不利于吸附剂中吸附质解吸,因此,单位吸附剂吸附解吸量的差值远低于等温吸附与解吸过程,吸附剂使用效率降低。对于吸附过程大量放热的变压吸附分离工艺,通常的方法是在吸附塔中设立冷却系统和加热系统。然而冷却与加热系统的设立,热流体与冷流体的频繁更换,不利于吸附剂接近等温吸附过程,变压吸附循环时间加长,仍然不利于吸附剂使用效率的提高。热泵的工作原理是在设定的温度范围内,液体通过气化带走热量,而气体通过液化散发热量。气体吸附过程的发热与解吸过程的吸热同时在两个或两个以上不同的吸附塔中进行,总的吸附热与解吸热接近。
技术实现思路
变压吸附过程,为了解决吸附过程热量的移走与解吸过程热量的供给,工艺至少设置3个以上吸附塔。在吸附塔中设立热 ...
【技术保护点】
1.一种改进的变压吸附工艺,其特征在于:变压吸附工艺至少设置3个以上吸附塔,在吸附塔中设立热泵系统,热泵的工作液气化温度为35℃~70℃,其中吸附塔在处于吸附过程时,吸附剂放热,热泵内液体温度升高,液体处于气化过程,由此,吸附剂传热给热泵,使吸附剂的温度升高幅度符合工艺要求,热泵送出的气体自动送入处于解吸状态的吸附塔,解吸状态的吸附塔中,吸附剂吸热,热泵内气体被冷却处于液化过程,热泵传热给吸附剂,使吸附剂的温度降低幅度符合工艺要求;变压吸附过程是吸附与解吸变化的过程,由此,热泵的循环工作方式与吸附塔同步,吸附剂床层温度变化比无热泵系统减少。/n
【技术特征摘要】
1.一种改进的变压吸附工艺,其特征在于:变压吸附工艺至少设置3个以上吸附塔,在吸附塔中设立热泵系统,热泵的工作液气化温度为35℃~70℃,其中吸附塔在处于吸附过程时,吸附剂放热,热泵内液体温度升高,液体处于气化过程,由此,吸附剂传热给热泵,使吸附剂的温度升高幅度符合工艺要...
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