Vacuum Evaporation(bay hơi chân khô

Vacuum Evaporation(bay hơi chân không). In this process, dilute(loãng) sulfuric acid is maintained (duy trì)at the boiling temperature under vacuum by indirect heating (gia nhiệt gián tiếp)with steam. The vapors evolved are recondensed almost completely in a downstream cooling system so that, apart from insignificant amounts of inert gases desorbed from the acid, there is no gaseous effluent. Other dissolved volatile impurities that may be present, especially in organic- contaminated acids, can generally be condensed as well. Heavily contaminated acids containing inorganic substances, which tend to deposit solids during evaporation, are effectively concentrated in forced- circulation evaporators, whereas for comparatively pure spent acids a natural circulation system may be adequate [128]. Evaporators of this type are satisfactory for concentrating dilute sulfuric acid to 70 – 80 % [129].

Kết quả (Anh) 1:

Vacuum Evaporation (vacuum evaporation). In this process, dilute sulfuric acid (diluted) is maintained (maintenance) at the boiling temperature under vacuum by indirect heating (indirect heat) with steam. The vapors are recondensed evolved almost completely in a downstream cooling system so that, apart from insignificant amounts of inert gases desorbed from the acid, there is no gaseous effluent. Other dissolved volatile impurities that may be present, especially in organic-contaminated acids, can generally be condensed as well. Heavily contaminated acids containing inorganic solids ', which tend to deposit the work during evaporation, are effectively concentrated in forced-circulation evaporators, whereas for comparatively pure spent acids a natural circulation system may be adequate [128]. Evaporators of this type are satisfactory for concentrating dilute sulfuric acid to 70-80% [129].

Kết quả (Anh) 2:

Vacuum Evaporation (vacuum evaporation). In this process, dilute (diluted) sulfuric acid is maintained (maintain) at the boiling temperature under vacuum by indirect heating (indirect heat) with steam. The vapors are recondensed almost completely evolved in a downstream cooling system than that, apart from insignificant tiền of inert Gases desorbed from the acid, có gaseous effluent. Other volatile impurities dissolved có be present, print Especially organic- contaminated acids, can be condensed Generally as well. Heavily contaminated acids containing inorganic substances, mà Tend to deposit solids khi evaporation, are effectively concentrated forced- print circulation evaporators, for comparatively pure còn spent a natural amino lẽ adequate circulation system [128]. Evaporators of this type are satisfactory for concentrating dilute sulfuric acid to 70-80% [129].