中塑资讯

news center

  • 行业资讯

    当前位置: 网站首页 > 中塑资讯 > 行业资讯

    • 吸收塔和吸附塔的区别?
    • 本站编辑:湖北中塑环保科技有限公司发布日期:2022-03-16 10:33 浏览次数:

    吸收塔是采用低挥发或不挥发性溶剂对VOCs进行吸收,再利用VOCs和吸收剂物理性质的差异进行分离。

    含VOCs的气体自吸收塔底部进入塔内,在上升过程中与来自塔顶的吸收剂逆流接触,净化后的气体由塔顶排出。

    吸收VOCs的吸收剂通过热交换器后,进入汽提塔顶部,在温度高于吸收温度或压力低于吸收压力的条件下解吸。解吸后的吸收剂经过溶剂冷凝器冷凝后回到吸收塔。解吸出的VOCs气体经过冷凝器、气液分离器后以较纯的VOCs气体离开汽提塔,被回收利用。

    吸附塔是用多孔性固体物质处理流体混合物时,流体中的某一组分或某些组分可被吸表面并浓集其上,此现象称为吸附。吸附处理废气时,吸附的对象是气态污染物,气固吸附。被吸附的气体组分称为吸附质,多孔固体物质称为吸附剂。

    固体表面吸附了吸附质后,一部被吸附的吸附质可从吸附剂表面脱离,此现附。而当吸附进行一段时间后,由于表面吸附质的浓集,使其吸附能力明显下降而吸附净化的要求,此时需要采用一定的措施使吸附剂上已吸附的吸附质脱附,以协的吸附能力,这个过程称为吸附剂的再生。

    因此在实际吸附工程中,正是利用吸附一再生一再吸附的循环过程,达到除去废气中污染物质并回收废气中有用组分。

    The absorption tower uses low volatile or nonvolatile solvent to absorb VOCs, and then uses the difference of physical properties between VOCs and absorbent for separation.

    The gas containing VOCs enters the tower from the bottom of the absorption tower, contacts with the absorbent from the tower top countercurrent in the rising process, and the purified gas is discharged from the tower top.

    After passing through the heat exchanger, the absorbent absorbing VOCs enters the top of the stripper and desorbs when the temperature is higher than the absorption temperature or the pressure is lower than the absorption pressure. The desorbed absorbent returns to the absorption tower after being condensed by the solvent condenser. After passing through the condenser and gas-liquid separator, the desorbed VOCs gas leaves the stripper as pure VOCs gas and is recycled.

    Adsorption tower is a phenomenon that a component or some components in the fluid can be absorbed and concentrated on the surface when the fluid mixture is treated with porous solid substances. This phenomenon is called adsorption. When treating waste gas by adsorption, the object of adsorption is gaseous pollutants and gas-solid adsorption. The adsorbed gas component is called adsorbate, and the porous solid material is called adsorbent.

    After the adsorbate is adsorbed on the solid surface, a part of the adsorbate can be separated from the adsorbent surface. When the adsorption is carried out for a period of time, due to the concentration of surface adsorbate, its adsorption capacity decreases significantly, and the requirements of adsorption purification, at this time, certain measures need to be taken to desorb the adsorbate on the adsorbent to improve the adsorption capacity. This process is called adsorbent regeneration.

    Therefore, in the actual adsorption engineering, the circular process of adsorption regeneration and repeated adsorption is used to remove the pollutants in the waste gas and recover the useful components in the waste gas.

    2-1Z404150J8.jpg

    返回顶部