Evaporative vacuum drainer

Abstract

The invention relates to an evaporative vacuum drainer, which comprises a vacuum chamber, a balance chamber, a hollow sink-and-float device, a vacuum valve set and a balance valve set, wherein an evaporator heating chamber connector is formed on the vacuum chamber; the balance chamber is positioned under the vacuum chamber; an air inlet pipe and a water outlet are arranged on the balance chamber;the upper half part of the sink-and-float device is positioned in the vacuum chamber; the lower half part of the sink-and-float device is positioned in the balance chamber; the vacuum valve set is arranged at the upper half part of the sink-and-float device; the balance valve set is arranged at the lower half part of the sink-and-float device; when the sink-and-float device floats upwards, the vacuum valve set is opened and the balance valve set is closed; and when the sink-and-float device sinks, the vacuum valve set is closed and the balance valve set is opened. The evaporative vacuum drainer has the advantages that the evaporated condensate water can be drained out of a system at vacuum state without the help of an external energy resource.

Description

technical field [0001] The invention relates to an evaporation device, in particular to an evaporation vacuum drainer. Background technique [0002] In order to reduce energy consumption and reduce pollution, many evaporating and concentrating devices that used to be boiled in large pots have been changed into multi-effect evaporating devices. [0003] In the multi-effect evaporator, the shell side of the last effect heating chamber is often in a negative pressure state. Therefore, in order to discharge steam condensed water, foreign methods are currently used in China to pump the condensed water with a vacuum pump 18, such as figure 1 . In foreign countries, the amount of water pumped is automatically controlled by the instrument. Domestic manufacturers basically do not use automatic control devices, resulting in either excessive suction and steam being taken away as water, resulting in increased steam consumption, or insufficient suction and drainage, resulting in water ...

AI Technical Summary

Problems solved by technology

However, the small evaporator does not have an automatic control system itself, so it is not very suitable to use a set of automatic control system for vacuum drainage.

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