Evaporative performance of Single Tube and Multi Tube Falling Film Evaporator Prototypes for Molten Butter: An Experimental Study

A calandria liquid distributor device was designed for horizontal falling film evaporation. The guide plate was introduced in this, which is easy to manufacture and can effectively reduce splash phenomenon. This paper studies the liquid distribution from the relation between distributive unwell-distributed coefficient and liquid flux of distributor tube and distributor hole. The result showed that the distributive unwell-distributed coefficient of in liquid distributor was decreased along with accretion of liquid flux, as apposed to homogeneous perforated. The unwell-distributed hole coefficient of distributor tube No.0 was increased along with accretion of flux, as apposed to distributor tube No.1 and distributor tube No.2.

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Application of Desiccant Technology for Concentrating Liquid Foods - Experimental Investigation

International Journal of Food Engineering ◽

10.2202/1556-3758.1102 ◽

2007 ◽

Vol 3 (5) ◽

Author(s):

Palanichamy Gandhidasan ◽

Habib I. Abualhamayel

Keyword(s):

Flow Rate ◽

Evaporation Rate ◽

Food Concentration ◽

Falling Film ◽

Liquid Food ◽

Liquid Desiccant ◽

Transfer Resistance ◽

Single Tube ◽

Film Evaporator ◽

Liquid Foods

A single tube, stainless steel, liquid desiccant falling film evaporator was built and tested with the calcium chloride solution as the liquid desiccant to concentrate liquid foods. Experiments were conducted in the above setup with sugar solutions as the liquid food. To minimize water vapor mass transfer resistance, non-condensibles were removed from the system by a vacuum pump. No steam was used to drive this evaporator.The liquid food was heated to about 48ºC when the ambient temperature was 40ºC. The single tube double falling film evaporator was tested to determine the effect of desiccant concentration, temperature, and flow rate on the evaporation rate. The effect of liquid food concentration, temperature, and flow rate on evaporation rate was also studied. An uncertainty and error analysis for the experimental data was performed. It was demonstrated that liquid desiccants could provide enough energy, through heat of absorption, to evaporate a liquid food in a falling film evaporator with vapor transfer lines.

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Proposal for modernization of Robert evaporators

Sugar Industry ◽

10.36961/si25908 ◽

2020 ◽

pp. 51-54

Author(s):

Hans Joachim Praus

Keyword(s):

Falling Film ◽

Film Evaporator ◽

Heating Steam

It is proposed to convert existing Robert evaporators into Trebor evaporators. Trebor evaporators work as falling film evaporators with the well-known thermal and technological advantages. When converting a Robert evaporator into a Trebor evaporator, the heating steam inlet and the vapour outlet as well as the condensate drain remain in their original positions. If necessary, the positions of the juice inlet and outlet nozzles are changed, and two additional nozzles and a circulation juice pump are required. These changes are cheaper than installing a new falling film evaporator.

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