Heater structure in plate-type falling film evaporator

Abstract

The invention discloses a heater structure in a plate-type falling film evaporator, which reasonably uses heat to ensure evaporation effect. The heater structure comprises an upper heater and a lower heater in the shell of the evaporator, wherein the length radio of upper heating plates forming the upper heater to lower heating plates forming the lower heater is 5.5-6.0:4.5-4.0. The heater structure is suitable for plate-type falling film evaporators.

Description

technical field [0001] The invention relates to a plate type falling film evaporator, in particular to a heater structure in the plate type falling film evaporator. Background technique [0002] An upper heater and a lower heater are arranged in the shell of a common plate-type falling film evaporator, and the length of the upper heating plate constituting the upper heater is equal to the length of the lower heating plate constituting the lower heater. The heater of this structure The disadvantage is: since the evaporating solution is fed with a low boiling point, the upper heater not only has to undertake the evaporation of the solution, but also must bear the temperature of the solution first, and the heat required is larger than that of the lower heater. Relatively speaking, the lower heater needs The heat of the plate type falling film evaporator is smaller than that of the upper heater, so the ordinary plate falling film evaporator does not make good use of the heat, an...

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Problems solved by technology

[0002] An upper heater and a lower heater are arranged in the housing of a common plate type falling film evaporator, and the length of the upper heating plate constituting the upper heater is equal to the length of the lower heating plate constituting the lower heater. The heater of this structure The disadvantage is: since the evaporating solution is fed with a low boiling point, the upper heater not only has to undertake the evaporation of the solution, but also must bear the temperature of the solution first, and the heat required is larger than that of the lower heater. Relatively speaking, the lower heater needs The heat is smaller than that of the upper heater, so the ordinary plate falling film evaporator does not make good use of the heat, and cannot guarantee the temperature of the solution on the entire longitudinal section of the evaporator and the heat required for evaporation, and it is difficult to ensure the evaporation effect

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