Concentrator based on vapor thermal gain technology

Abstract

A concentrator based on a vapor thermal gain technology comprises a raw liquid preheating section, a first-effect concentration section, a second-effect concentration section and a vacuum system, wherein a raw material medicine liquid is input from a raw liquid inlet of a plate heat exchanger, enters the first-effect concentration section and the second-effect concentration section after being preheated and is concentrated under the cooperation of the vacuum system. The concentrator is simple in structure and low in first-period investment cost, operates stably and has no motion parts except the vacuum system, so that long-term stable operation of the concentrator is guaranteed; the heat transfer effect is good, the flow speed of the medicine liquid in heater tubes is high, tube blockage is avoided, and gain heat transfer is realized; the maintenance cost is low, heaters can be detached for cleaning, and maintenance is convenient and easy; the target concentration is not limited, and the concentration of a traditional Chinese medicine extraction liquid can reach the target concentration once; the foam problem is effectively solved, the producing amount of foam can be controlled and the problem that foam carries the medicine liquid away can be solved; the noise is low and the energy saving effect is remarkable.

Description

technical field [0001] The invention relates to the technical field of traditional Chinese medicine extraction and concentration, in particular to a concentration device based on steam heat gain technology. Background technique [0002] With the continuous development of the medical economy, traditional medicine plays an increasingly important role in the national health industry. The demand for Chinese patent medicines purified from natural medicines is increasing day by day. To make traditional Chinese medicine preparations, most Chinese medicinal materials need to undergo extraction, concentration, purification and other process operations; the concentration process of Chinese medicine extracts is one of the most energy-consuming chemical operation units. First, it accounts for about 60% to 70% of the total energy consumption. Although the traditional Chinese medicine extract concentration technology and equipment have been continuously improved and innovated, some progr...

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Problems solved by technology

However, there are some common problems in the application of MVR technology to the concentration process of traditional Chinese medicine extracts, which limits its popularization and application in this field, such as: (1) The initial investment is high, and the evaporation capacity of imported compressors per 1 ton The average price of the unit is around 600,000 RMB; (2) The specific gravity of concentration cannot reach the target concentration, and it is difficult to increase the specific gravity of the concentrated liquid after using MVR technology to 1.05. Usually, it is still necessary to use traditional double-effect or multi-effect concentrators. Further concentration will increase the cost invisibly; (3) The maintenance cost is high, the steam compressor contains high-speed moving parts, it is difficult to ensure the long-term stable operation of the machine, once the steam compressor fails, not only the maintenance cost is high, but also the shutdown will Cause losses; (4) The blockage of the heater tubes, due to the relatively low circulation speed of the liquid medicine between the evaporator and the heater, the liquid medicine in the heater tubes is heated for a long time to cause adhesion problems, which not only leads to heat transfer The thermal resistance becomes larger, and the tubes are easily blocked, resulting in the inability to concentrate; (5) the noise is large, and the noise generated by the mechanical steam compressor far exceeds the noise limit requirements of GMP for pharmaceutical workshops; (6) the foam problem, some traditional Chinese medicine extracts Contains saponin components, these components tend to produce a large amount of foam when the water is heated and evaporated, not only taking away the liquid medicine and causing losses, but also adhering to the condenser to affect the heat transfer effect

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