Smart metering device for condensation rate of traditional Chinese medicine concentrating equipment condensate

Abstract

A smart metering device for the condensation rate of a traditional Chinese medicine concentrating equipment condensate, comprises a control module, a first metering tank, a second metering tank, a condensate collecting pipe, a differential pressure liquid level gauge, a conveying pump and a mass flow meter, wherein the first metering tank is in communication with the second metering tank through the condensate collecting pipe, and is connected to the inlet of the conveying pump through the condensate collecting pipe; the differential pressure liquid level gauge is used for detecting the liquidlevel of the condensate; the outlet of the conveying pump is connected with the mass flow meter; the conveying pump is driven by a variable-frequency motor.

Description

technical field [0001] The invention relates to a condensation rate metering device for pharmaceutical production. Background technique [0002] In the production process of Chinese patent medicine, it is necessary to concentrate the medicinal material extract. It is necessary to accurately control the volume of the remaining medicinal liquid in the concentration of the medicinal liquid. Since the state of the medicinal liquid changes greatly when the concentration end point is approaching, it is difficult to accurately judge the concentration end point by using a conventional metering tank to calculate the volume of the distillate. [0003] In order to avoid the damage of heat-resistant active ingredients in traditional Chinese medicine and to improve the concentration efficiency, the method of decompression concentration is generally adopted in the process of concentrating Chinese medicine liquid. In this case, affected by the vacuum degree in the equipment, the method of ...

AI Technical Summary

Problems solved by technology

The condensation rate of the condensate can be used to judge the end point of the concentration, but since the solvents of the traditional Chinese medicine extract are mostly mixed solvents with a large water content (such as ethanol with a content of 30% to 70%), when the end point of the concentration is approaching, the amount of evaporation often decreases. The condensate flow rate is much smaller than its peak flow rate. Due to the limitation of the measuring range and working principle of the conventional Coriolis force mass flowmeter, when the flow rate is too small, the measurement accuracy will inevitably deteriorate (reference - working conditions for flowmeter measurement The impact of accuracy, Jia Weibin et al., Proceedings of the Fourth National Petroleum and Chemical Industry Instrument and Automation Technology Exchange Symposium, 2005), and the change of gas and temperature in the condensate will also affect the measurement accuracy, resulting in the use of Conventional methods are difficult to accurately measure the flow of condensate. Therefore, in the prior art, it is generally impossible to monitor the entire concentration process of the traditional Chinese medicine extract through accurate online detection of the condensation rate. The concentration end point can only be judged based on experience, resulting in low accuracy and concentration. Fluid quality is unstable

[0005] In view of the particularity of the concentration and extraction of traditional Chinese medicine extracts, at present, it is difficult to accurately detect the evaporation rate of solvents in the process of traditional Chinese medicine concentration. Problems to be solved in technology

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