A dynamic boiling point-saturated vapor pressure tester for Chinese medicine extracts

Abstract

The invention discloses a dynamic boiling point-saturated vapor pressure measuring instrument for Chinese medicine extracts, comprising a vacuum pump, the vacuum pump being connected to a No. 1 vacuum buffer tank and a No. 2 vacuum buffer tank through pipelines, the No. 1 vacuum buffer tank and the No. 2 vacuum buffer tank being connected through pipelines, and the No. 2 vacuum buffer tank being sequentially connected to a drying tower, a condenser and a heating boiler through pipelines. The invention is based on the dynamic boiling point-saturated vapor pressure correlation theory, and can realize the detection of different boiling points and the corresponding saturated vapor pressures of Chinese medicine extracts under different concentration conditions.

Description

Technical Field

[0001] The invention relates to the technical field of a concentration process of a traditional Chinese medicine extract, and in particular to a dynamic boiling point-saturated vapor pressure measuring instrument for a traditional Chinese medicine extract. Background Art

[0002] Traditional Chinese medicine manufacturing is an important part of my country's pharmaceutical industry and has been written into the strategic plan of "Made in China 2025". The goal of improving its processing and manufacturing level has risen to the height of national strategy. The modernization of traditional Chinese medicine technology has important significance in the overall economic and social development. However, at present, the quality of traditional Chinese medicine products between batches in my country's traditional Chinese medicine manufacturing industry is generally uneven, and adverse reactions of traditional Chinese medicine are often reported in the newspapers. The main reason for the fluctuation of the efficacy and quality of traditional Chinese medicine is the instability of the product quality during the extraction process of traditional Chinese medicine.

[0003] The concentration process of traditional Chinese medicine is a key link in the quality control of traditional Chinese medicine. The concentration of traditional Chinese medicine is the process of evaporating the solvent of the traditional Chinese medicine extract under the action of external heating to obtain a high-concentration traditional Chinese medicine extract. In this process, the boiling point-saturated vapor pressure of the traditional Chinese medicine extract will change with the increase of the solid content concentration in the solution, and the evolution trend of these two key physical parameters directly affects the regulation of the process control process of traditional Chinese medicine concentration.

[0004] At present, the research on boiling point-saturated vapor pressure in the process of traditional Chinese medicine concentration is relatively backward, which cannot fully guide the research and development of traditional Chinese medicine concentration production process and actual engineering needs.

[0005] Therefore, designing and providing a device that can detect the boiling point-saturated vapor pressure of traditional Chinese medicine extracts is a technical problem that needs to be solved urgently in the field of traditional Chinese medicine production. Summary of the invention

[0006] The purpose of the present invention is to overcome the deficiencies in the prior art and to provide a dynamic boiling point-saturated vapor pressure measuring instrument for Chinese medicine extracts. Based on the dynamic boiling point-saturated vapor pressure correlation theory, the instrument can detect different boiling points and their corresponding saturated vapor pressures of Chinese medicine extracts under different concentration conditions.

[0007] The objectives of the present invention are achieved through the following technical solutions.

[0008] A dynamic boiling point-saturated vapor pressure measuring instrument for a traditional Chinese medicine extract comprises a vacuum pump, wherein the vacuum pump is respectively connected to a No. 1 vacuum buffer tank and a No. 2 vacuum buffer tank through pipelines, the No. 1 vacuum buffer tank and the No. 2 vacuum buffer tank are connected through pipelines, and the No. 2 vacuum buffer tank is sequentially connected to a drying tower, a condenser and a heating boiler through pipelines.

[0009] A vacuum valve is arranged on the pipeline connecting the vacuum pump with the first vacuum buffer tank and the second vacuum buffer tank.

[0010] The No. 1 vacuum buffer tank is connected to a No. 1 vacuum pressure reducing valve and a No. 1 pressure gauge at the top, and is connected to a No. 1 drain valve at the bottom through a pipeline.

[0011] A No. 2 pressure gauge is installed on the top of the No. 2 vacuum buffer tank, and a No. 2 drain valve is connected to the bottom through a pipeline.

[0012] A No. 2 vacuum pressure reducing valve is arranged on the pipeline connecting the No. 1 vacuum buffer tank and the No. 2 vacuum buffer tank.

[0013] A No. 3 pressure gauge is provided on the pipeline connecting the drying tower and the condenser.

[0014] The heating boiler is equipped with a temperature gauge.

[0015] Compared with the prior art, the technical solution of the present invention has the following beneficial effects:

[0016] (1) In the present invention, the heating boiler can be loaded with a relatively large amount of Chinese medicine extract. Compared with the static method for determining boiling point-saturated vapor pressure, the present device can effectively avoid the detection error caused by the lack of overall representativeness of the sampling concentration due to the small amount of solution detected;

[0017] (2) In the present invention, a double vacuum buffer tank - vacuum degree double-stage buffer adjustment system is adopted, which can effectively achieve the stability of the vacuum degree of the equipment and avoid the phenomenon that the vacuum degree fluctuates greatly during the detection process and is difficult to effectively adjust;

[0018] (3) In the present invention, the same vacuum pump is used to provide a vacuum source for the dual vacuum buffer tanks at the same time, thereby ensuring that the vacuum degree in the system will not fluctuate greatly due to the working characteristics of the pump itself, and also reducing equipment costs and avoiding equipment waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the present invention.

[0020] Figure numerals: 1 vacuum pump; 2 vacuum valve; 3 No. 2 vacuum pressure regulating valve; 4 No. 1 pressure gauge; 5 No. 2 pressure gauge; 6 No. 1 vacuum buffer tank; 7 No. 1 drain valve; 8 No. 2 vacuum buffer tank; 9 No. 2 drain valve; 10 drying tower; 11 thermometer; 12 No. 3 pressure gauge; 13 condenser; 14 heating boiler; 15 No. 1 vacuum regulating valve. DETAILED DESCRIPTION

[0021] The present invention will be further described below in conjunction with the accompanying drawings.

[0022] In order to make the purpose and features of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are further described below in conjunction with the accompanying drawings. It should be noted that the drawings are all in a very simplified form and use inaccurate ratios, which are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present invention.

[0023] The dynamic boiling point-saturated vapor pressure measuring instrument for Chinese medicine extract of the present invention, as a device for detecting the boiling point-saturated vapor pressure of Chinese medicine extract, can realize the detection of different boiling points and the corresponding saturated vapor pressure of Chinese medicine extract under different concentration conditions based on the dynamic boiling point-saturated vapor pressure correlation theory.

[0024] like Figure 1 As shown, the dynamic boiling point-saturated vapor pressure measuring instrument of Chinese medicine extract of the present invention comprises a vacuum pump 1, a drying tower 10, a condenser 13 and a heating boiler 14. The vacuum pump 1 is connected to the No. 1 vacuum buffer tank 6 and the No. 2 vacuum buffer tank 8 through a pipeline, and a vacuum valve 2 is installed on the pipeline. The No. 1 vacuum buffer tank 6 is connected to the No. 1 vacuum pressure-reducing valve 15 and the No. 1 pressure gauge 4 at the top, and the No. 1 drain valve 7 is connected to the bottom through a pipeline. The No. 1 vacuum buffer tank 6 and the No. 2 vacuum buffer tank 8 are connected through a pipeline, and the No. 2 vacuum pressure-reducing valve 3 is installed on the pipeline. The No. 2 vacuum buffer tank 8 is installed with a No. 2 pressure gauge 5 at the top, and the No. 2 drain valve 9 is connected to the bottom through a pipeline. The No. 2 vacuum buffer tank 8 is connected to the drying tower 10 through a pipeline, and the drying tower 10 is connected to the condenser 13 through a pipeline, and a No. 3 pressure gauge 12 is installed on the pipeline. The condenser 13 is connected to the heating boiler 14 through a pipeline, and the heating boiler 14 is equipped with a thermometer 11.

[0025] In the process of using the device to detect the boiling point-saturated vapor pressure of the Chinese medicine extract, first add a certain amount of the Chinese medicine extract into the heating boiler 14 so that the thermometer 11 can be fully immersed in the Chinese medicine extract, close the No. 1 drain valve 7, the No. 2 drain valve 9, the No. 1 vacuum pressure relief valve 15 and the No. 2 vacuum pressure relief valve 3, open the vacuum valve 2, power on the vacuum pump 1, evacuate the air in the equipment until the pressure displayed by all the pressure gauges in the equipment reaches the minimum, pass the coolant into the condenser 13 until the condenser 13 works stably, turn on the heating boiler 14, and when the Chinese medicine extract in the heating boiler 14 begins to boil, reduce the heating power so that the steam condensation reflux liquid can slowly drip back into the heating equipment. , maintain the heating power unchanged, record the boiling temperature of the solution and the number on the No. 3 pressure gauge 12 at this time, the pressure reading is the saturated vapor pressure of this solution at the boiling point temperature, gradually increase the No. 1 vacuum air pressure relief valve 15 and the No. 2 vacuum air pressure relief valve 3 to increase the equipment pressure. In this process, maintain the No. 1 pressure gauge 4 reading higher than the No. 2 pressure gauge 5 reading. In this adjustment process, ensure that the No. 3 pressure gauge 12 reading is gradually increased according to the 3kpa pressurization process. After each pressurization, maintain a period of time until the solution boils again until its temperature gauge reading is stable. Record the boiling point temperature of the solution and the reading of the No. 3 pressure gauge 12 under different pressure conditions respectively, and you can get the saturated vapor pressure of the solution under different boiling point temperature conditions.

[0026] Although the functions and working processes of the present invention have been described above in conjunction with the accompanying drawings, the present invention is not limited to the above-mentioned specific functions and working processes. The above-mentioned specific implementation methods are merely illustrative rather than restrictive. Under the guidance of the present invention, ordinary technicians in this field can also make many forms without departing from the scope of protection of the purpose of the present invention and the claims, which are all within the protection of the present invention.

Claims

1. A determination method based on a dynamic boiling point-saturated vapor pressure determination instrument for a Chinese medicine extract, the dynamic boiling point-saturated vapor pressure determination instrument for a Chinese medicine extract comprising a vacuum pump (1), the vacuum pump (1) being connected to a No. 1 vacuum buffer tank (6) and a No. 2 vacuum buffer tank (8) respectively through pipelines, and a vacuum valve (2) being arranged on the pipelines; a No. 1 vacuum pressure relief valve (15) and a No. 1 pressure gauge (4) being connected to the upper part of the No. 1 vacuum buffer tank (6), the No. 1 vacuum buffer tank (6) and the No. 2 vacuum buffer tank (8) being connected through pipelines, and a No. 2 vacuum pressure relief valve (15) being arranged on the pipelines; 3); a No. 2 pressure gauge (5) is installed on the top of the No. 2 vacuum buffer tank (8); the No. 2 vacuum buffer tank (8) is connected to a drying tower (10), a condenser (13) and a heating boiler (14) in sequence through pipelines; a No. 3 pressure gauge (12) is provided on the pipeline connecting the drying tower (10) and the condenser (13); the heating boiler (14) is installed with a temperature gauge (11); the bottom of the No. 1 vacuum buffer tank (6) is connected to a No. 1 drain valve (7) through a pipeline; the bottom of the No. 2 vacuum buffer tank (8) is connected to a No. 2 drain valve (9) through a pipeline, characterized in that: In the process of detecting the boiling point-saturated vapor pressure of the Chinese medicine extract, a certain amount of the Chinese medicine extract is first added to the heating boiler (14), so that the thermometer (11) is fully immersed in the Chinese medicine extract, the No. 1 drain valve (7), the No. 2 drain valve (9), the No. 1 vacuum pressure relief valve (15) and the No. 2 vacuum pressure relief valve (3) are closed, the vacuum valve (2) is opened, the vacuum pump (1) is powered on and started, and the air is evacuated until the pressure displayed on all pressure gauges reaches the minimum, the coolant is passed into the condenser (13) until the condenser (13) works stably, and the heating boiler (14) is turned on. When the Chinese medicine extract in the heating boiler (14) begins to boil, the heating power is reduced so that the steam condenses and the reflux liquid slowly drips back into the heating device. The heating power is maintained unchanged. The boiling temperature of the solution and the reading of the No. 3 pressure gauge (12) are recorded. The pressure reading is the saturated vapor pressure of the solution at the boiling point temperature. The No. 1 vacuum pressure reducing valve (15) and the No. 2 vacuum pressure reducing valve (3) are gradually increased to increase the pressure of the equipment. During this process, the reading of the No. 1 pressure gauge (4) is maintained higher than the reading of the No. 2 pressure gauge (5). During this adjustment process, it is ensured that the reading of the No. 3 pressure gauge (12) gradually increases according to the 3 kpa pressure increase process. After each pressure increase, it is maintained for a period of time until the solution boils again until the temperature gauge reading is stable. The boiling point temperature of the solution and the reading of the No. 3 pressure gauge (12) under different pressure conditions are recorded respectively, so that the saturated vapor pressure of the solution under different boiling point temperature conditions is obtained.

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