Traditional Chinese medicine extraction energy-saving system and control method

Abstract

The invention relates to the technical field of traditional Chinese medicine extraction, in particular to a traditional Chinese medicine extraction energy-saving system and a control method. Comprising a steam generator, an extraction tank, a purified water tank, a duplex filter, a cooler, a heating coil, a pneumatic diaphragm valve, a heat exchanger, a check valve, a thermal static steam trap and a steam control unit. According to a pure steam direct heating mode, the added material water is correspondingly reduced according to the law of conservation of heat, the boiling time is shortened and the steam consumption is reduced according to the water inlet amount of the original process, a full-automatic control mode is adopted, the operation is simple, the waste of industrial steam is reduced, the consumption of cooling water is reduced, and the production cost is reduced. And the problem of steam pressure fluctuation is well solved in the operation process.

Description

Technical Field

[0001] The present invention relates to the technical field of traditional Chinese medicine extraction, and in particular to a traditional Chinese medicine extraction energy-saving system and a control method. Background Art

[0002] At present, the straight-cylinder extraction process of traditional Chinese medicine mainly uses industrial steam to heat the feed liquid. The steam condensate is discharged through the steam trap. After the feed liquid is heated to 98-100 degrees by high-pressure steam, the pressure is adjusted to low pressure, and the feed liquid begins to maintain a slightly boiling state. The time varies from 3 hours, 2 hours, and 1.5 hours, depending on the nature of the Chinese medicinal materials and the process.

[0003] In the slightly boiling state, since the industrial steam pressure is controlled manually, the boiler steam pressure fluctuates during use, and the steam pressure in the slightly boiling state fluctuates, but the minimum pressure for steam use must be maintained. This results in waste of industrial steam. At the same time, the pure steam generated in the slightly boiling state needs to be condensed and returned to the extraction tank. Due to the fluctuation of the steam pressure, the pure steam pressure generated in the extraction tank fluctuates. It still needs to be maintained within a stable range, resulting in a large amount of cooling water used, resulting in waste of industrial steam. The steam pressure of the structure of this application is more stable, which can Summary of the Invention

[0004] The purpose of the present invention is to provide an energy-saving system and control method for traditional Chinese medicine extraction, which reduces the waste of industrial steam and the amount of cooling water, and solves the problem of steam pressure fluctuation during operation.

[0005] To achieve the above-mentioned object, the present invention provides an energy-saving system for extracting traditional Chinese medicine, comprising a steam generator, an extraction tank, a purified water tank and a double filter are respectively connected on both sides of the steam generator, a cooler is provided on the top of the extraction tank, a heating coil is provided inside, and a pneumatic diaphragm valve is provided on the top;

[0006] One side of the cooler is connected to a heat exchanger, which is provided with a chilled water delivery pipe and a chilled water output pipe, and can condense the purified water to 17°. The condensed purified water is then passed through the cooler to raise the purified water to 99°.

[0007] A check valve and a thermostatic steam trap are also provided on one side of the extraction tank;

[0008] A steam control unit is provided between the extraction tank and the steam generator.

[0009] Wherein, three temperature sensors are provided on the extraction tank, and a pressure sensor is provided on one side of the pneumatic mold isolation valve at the top thereof.

[0010] Wherein, the temperature sensor is provided on the auxiliary circuit of the cooler, and an oil-water separator is provided at the bottom.

[0011] Wherein, an angle seat regulating valve and the pneumatic diaphragm valve are sequentially arranged on the top of the heat exchanger from bottom to top, and the pneumatic diaphragm valve is connected to the conveying pipeline of purified water.

[0012] Wherein, the pneumatic diaphragm valve and the angle seat regulating valve are respectively provided on the chilled water delivery pipe.

[0013] Wherein, the steam control unit includes a pressure gauge, a pressure sensor, an angle seat regulating valve, a pneumatic diaphragm valve and a bypass stop valve.

[0014] Among them, a Chinese medicine extraction control method is applicable to the Chinese medicine extraction energy-saving system, comprising the following steps:

[0015] After the Chinese medicine is added into the extraction tank, a certain amount of purified water is injected according to the process requirements and the feed port is closed;

[0016] According to the design requirements, pure steam that meets the requirements of the pharmacopoeia is used for heating, and the pressure is controlled at 0.25Mpa. At this time, the pure steam heats the material-water mixture in the extraction tank through the outer heating coil of the extraction tank. After condensation, the pure steam flows into the extraction tank through the pipeline and serves as a supplement for the feed liquid.

[0017] As the temperature of the material-water mixture rises to between 98° and 100°, the temperature sensor transmits a signal, and the pure steam pressure is automatically adjusted to 0.02Mpa, and a constant temperature micro-boiling state begins. The constant temperature timing begins, and the control system automatically times the time according to the process requirements;

[0018] The extraction tank enters a constant temperature and slightly boiling state. Purified water and chilled water for cooling work simultaneously to ensure that the pure steam generated in the slightly boiling state is cooled to 99°C and refluxed into the extraction tank. The chilled water cools the purified water to 17°C. The purified water cools the pure steam generated in the slightly boiling state, and the purified water temperature rises from 17°C to 99°C. At this time, the purified water at 99°C is added to the extraction tank as feed water.

[0019] When the constant temperature and micro-boiling time ends, the extraction work is completed and the system stops working;

[0020] After 5 minutes of shutdown, open the pneumatic valve to the duplex filter, and the water will enter the next process after being filtered.

[0021] The energy-saving system for extracting traditional Chinese medicine of the present invention adopts pure steam generated by a steam generator for heating. The condensed water after condensation of the pure steam flows back into the extraction tank, thereby reducing the waste of steam and water and achieving the effect of saving energy. During the extraction process, the pure steam in the extraction tank is kept in a slightly boiling state by two parts. One part first uses a control system to control the cooling water to cool the purified water and keep it at about 10 degrees. Then, the cooled purified water is used to cool the pure steam generated in the extraction tank to between 98 and 100 degrees. The cooled purified water is replenished back into the extraction tank as feed water, making full use of the heat of the steam in the slightly boiling state. The pure steam in the slightly boiling state of the second part adopts a PLC intelligent control system to ensure the pressure stability of the pure steam, reduce the waste of steam, thereby reducing the waste of industrial steam, and at the same time reduce the amount of cooling water used, thus solving the problem of steam pressure fluctuation during operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art.

[0023] Figure 1 It is a working principle diagram of the energy-saving system for extracting traditional Chinese medicine of the present invention.

[0024] Figure 2 It is a structural schematic diagram of the steam control unit of the present invention.

[0025] Figure 3 The present invention is a flow chart of a traditional Chinese medicine extraction control method.

[0026] Figure 1: Steam generator 1; steam control unit 2; temperature sensors 3, 8, 17, 18, 20; extraction tank 4; check valve 5; thermostatic steam trap 6; duplex filter 7; coolers 9, 10; pneumatic diaphragm valves 11, 16, 21; flow meter 12; heat exchanger 13; angle seat regulating valves 14, 15; oil-water separator 19; pressure sensor 22; system chilled water 23; chilled water inlet pipe 231; chilled water outlet pipe 232; heating coil 24; purified water tank 25; delivery pipeline 26. DETAILED DESCRIPTION

[0027] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0028] like Figure 1 and Figure 2 As shown, Figure 1 This is the working principle diagram of the Chinese medicine extraction energy-saving system. Figure 2Schematic diagram of the structure of a steam control unit 2. The present invention provides an energy-saving system for extracting traditional Chinese medicine, comprising a steam generator 1, an extraction tank 4, a purified water tank 25, a duplex filter 7, a cooler (9, 10), a heating coil 24, a pneumatic diaphragm valve (11, 16, 21), a heat exchanger 13, a check valve 5, a thermostatic steam trap 6, and a steam control unit 2. The above-mentioned solution reduces the waste of industrial steam and the amount of cooling water used, and effectively solves the problem of steam pressure fluctuation during operation. It can be understood that the above-mentioned solution can reduce the waste of industrial steam and the amount of cooling water used.

[0029] In this embodiment, the steam generator 1 can be powered by gas, electricity, or fuel oil to generate pure steam.

[0030] Preferably, the steam generator 1 is connected to both sides with an extraction tank 4, a purified water tank 25 and a duplex filter 7, respectively. The top of the extraction tank 4 is provided with a cooler (9, 10), a heating coil 24 is provided inside, and a pneumatic diaphragm valve 21 is provided on the top; pure steam is directly condensed in the outer heating coil 24, and after condensation, it enters the extraction tank 4 through the thermostatic steam trap 6 and the check valve 5. The purified water and chilled water for cooling work simultaneously, and through the heat exchanger 13, the chilled water will be able to condense the purified water to 17°. The chilled water enters the heat exchanger 13 from the outside through the chilled water inlet pipe 231, and at the same time enters the heat exchanger 13 through the delivery pipe 26 at the top of the purified water tank 25.

[0031] One side of the cooler (9, 10) is connected to a heat exchanger 13, and a chilled water delivery pipe 231 and a chilled water output pipe 232 are provided on the heat exchanger 13. The purified water can be condensed to 17°, and the condensed purified water is then passed through the cooler (9, 10) to raise the purified water temperature to 99°; when the purified water temperature is 17°, it enters the cooler (9, 10) through a pipeline, and the purified water is again raised to 99° in the cooler (9, 10) (the rise to 99° here is the heat generated by the steam in the extraction tank 4), and finally the purified water at 99° is added to the extraction tank 4 as a feed liquid. The pure steam generated in the slightly boiling state in the extraction tank 4 is cooled to 99 degrees by purified water and then flows back into the extraction tank 4 and is also cooled by the coolers (9, 10). Specifically, the steam generated in the slightly boiling state in the extraction tank 4 enters the coolers (9, 10) through a pipeline, is then cooled to 99 degrees by the low-temperature purified water in the coolers (9, 10), and then flows back into the extraction tank 4 through a pipeline. That is, the purified water is condensed to 17 degrees in the heat exchanger 13, and the 17-degree purified water condenses the steam generated in the extraction tank 4 to 99 degrees and flows back to the extraction tank 4. The purpose of raising the purified water to 99 degrees is to achieve temperature compliance and energy saving. The purified water is then raised to 99 degrees in the coolers (9, 10) and flows back into the extraction tank 4, cooling the steam generated in the extraction tank 4 and then flowing back into the extraction tank 4.

[0032] A check valve 5 and a thermostatic steam trap 6 are also provided on one side of the extraction tank 4; this structure is used for reflux coordination.

[0033] A steam control unit 2 is provided between the extraction tank 4 and the steam generator 1. After the preparatory work is completed, the equipment starts the heating program. The pneumatic diaphragm valve on the steam control unit 2 opens, and the angle seat regulating valve begins to adjust the pure steam inlet pressure to the design pressure (2 kg). As the temperature signal transmitted by the temperature sensor 3 in the extraction tank 4 reaches 101 degrees according to the set temperature (101 degrees), the angle seat regulating valve adjusts to the pure steam pressure to enter the micro-boiling mode (the pressure is adjusted to 0.2 kg) and begins to enter the micro-boiling mode regularly. The time is determined according to the process.

[0034] Preferably, three temperature sensors (3, 8, 20) are provided on the extraction tank 4, and a pressure sensor 22 is provided on one side of the pneumatic isolating valve 21 at the top thereof.

[0035] Preferably, the temperature sensor 18 is provided on the auxiliary circuit of the cooler (9, 10), and an oil-water separator 19 is provided at the bottom.

[0036] Preferably, an angle seat regulating valve 14 and the pneumatic diaphragm valve 11 are sequentially arranged on the top of the heat exchanger 13 from bottom to top, and the pneumatic diaphragm valve 11 is connected to the purified water delivery pipe 25. After the extraction tank 4 enters the micro-boiling mode, the pneumatic diaphragm valve 11 opens and purified water enters. The angle seat regulating valve 14 adjusts the amount of purified water inlet according to the set purified water flow rate. The angle seat regulating valve 14 is adjusted to the set flow rate through the feedback signal of the flow meter 12. The flow meter 12 is arranged between the angle seat regulating valve 14 and the pneumatic diaphragm valve 11. When the purified water control mode for cooling is started, the chilled water control mode is started at the same time. The pneumatic diaphragm valve 16 opens. According to the temperature (99 degrees) signal transmitted by the temperature sensor 18, the angle seat regulating valve 15 performs chilled water regulation.

[0037] Preferably, the pneumatic diaphragm valve 16 and the angle seat regulating valve 15 are respectively provided on the chilled water delivery pipe 231 .

[0038] Preferably, the steam control unit 2 includes a pressure gauge, a pressure sensor, an angle seat regulating valve, a pneumatic diaphragm valve and a bypass stop valve.

[0039] When using a traditional Chinese medicine extraction energy-saving system of the present invention, the chilled water condenses the purified water to 17 degrees through the cooperation of the heat exchanger 13, and the condensed purified water is then passed through the cooler (9, 10) to raise the purified water to 99 degrees (at this time, the purified water is raised to 99 degrees by lowering the temperature of the steam in the extraction tank 4) and is added to the extraction tank 4 as a feed liquid. The pure steam generated in the slightly boiling state in the extraction tank 4 is cooled to 99 degrees by the purified water (the steam generated by the extraction tank 4 enters the cooler (9, 10) through a pipeline, and the purified water is circulated, and the steam generated by the extraction tank 4 is cooled and refluxed into the extraction tank 4. The pneumatic valve flowing to the double filter 7 is opened, and the feed water enters the lower filter after filtration. The present invention uses pure steam for direct heating to reduce the high-temperature discharge of condensed water after industrial steam cooling. It saves industrial steam and raw water. The chilled water in the original constant temperature state is directly discharged back to the cooling tower. The purified water is cooled by chilled water and then cooled to the steam in a slightly boiling state, which reduces the heat loss of the pure steam in a slightly boiling state when chilled water is directly cooled, and achieves energy-saving effect. When the raw water is added, due to the use of pure steam for direct heating, according to the law of conservation of heat, the added raw water is reduced accordingly (calculated according to the water intake of the original process), which reduces the boiling time, reduces the steam consumption, and thus reduces the waste of industrial steam. At the same time, it reduces the consumption of cooling water, and solves the problem of steam pressure fluctuation during operation.

[0040] like Figure 3 As shown, Figure 3The present invention provides a flow chart of a Chinese medicine extraction control method, which is applicable to the Chinese medicine extraction energy-saving system, and includes the following steps:

[0041] S101: After the Chinese medicine is added into the extraction tank 4, a certain amount of purified water is injected according to the process requirements, and the feed port is closed;

[0042] S102: According to the design requirements, pure steam that meets the requirements of the pharmacopoeia is used for heating, and the pressure is controlled at 0.25 MPa. At this time, the pure steam passes through the outer heating coil 24 of the extraction tank 4 to heat the material-water mixture in the extraction tank 4. After condensation, the pure steam flows into the extraction tank 4 through the pipeline and serves as a supplement for the material liquid.

[0043] S103: As the temperature of the material-water mixture rises to between 98° and 100°, the temperature sensor transmits a signal, and the pure steam pressure is automatically adjusted to 0.02Mpa, and a constant temperature micro-boiling state begins. The constant temperature timing begins, and the control system automatically times the time according to the process requirements;

[0044] S104: The extraction tank 4 enters a constant temperature and slightly boiling state. The purified water and chilled water for cooling work simultaneously to ensure that the pure steam generated in the slightly boiling state is cooled to 99°C and refluxed into the extraction tank 4. The chilled water cools the purified water to 17°C. The purified water cools the pure steam generated in the slightly boiling state, and the temperature of the purified water rises from 17°C to 99°C. At this time, the purified water at 99°C is replenished into the extraction tank 4 as feed water.

[0045] S105: When the constant temperature and micro-boiling time ends, the extraction work is completed and the system stops working;

[0046] S106: After 5 minutes of shutdown, the pneumatic valve to the double filter 7 is opened, and the water passes through the filter and enters the next process.

[0047] The above disclosure is merely one or more preferred embodiments of the present application and is not intended to limit the scope of the present application. A person skilled in the art will understand that all or part of the processes of the above embodiments and equivalent changes made in accordance with the claims of the present application are still within the scope of the present application.

Claims

1. A Chinese medicine extraction energy-saving system, comprising a steam generator, characterized in that: The two sides of the steam generator are connected to an extraction tank, a purified water tank and a double filter respectively. The top of the extraction tank is provided with a cooler, a heating coil is provided inside, and a pneumatic diaphragm valve is provided on the top; One side of the cooler is connected to a heat exchanger, which is provided with a chilled water delivery pipe and a chilled water output pipe, and can condense the purified water to 17°. The condensed purified water is then passed through the cooler to raise the purified water to 99°. A check valve and a thermostatic steam trap are also provided on one side of the extraction tank; A steam control unit is provided between the extraction tank and the steam generator.

2. The energy-saving system for extracting traditional Chinese medicine according to claim 1, characterized in that: The extraction tank is provided with three temperature sensors, and a pressure sensor is provided on one side of the pneumatic mold isolation valve at the top thereof.

3. The energy-saving system for extracting traditional Chinese medicine according to claim 2, characterized in that: The temperature sensor is provided on the auxiliary circuit of the cooler, and an oil-water separator is provided at the bottom.

4. The energy-saving system for extracting traditional Chinese medicine according to claim 3, characterized in that: An angle seat regulating valve and the pneumatic diaphragm valve are sequentially arranged on the top of the heat exchanger from bottom to top, and the pneumatic diaphragm valve is communicated with a conveying pipeline for purified water.

5. The Chinese medicine extraction energy-saving system according to claim 4, characterized in that : The pneumatic diaphragm valve and the angle seat regulating valve are respectively provided on the chilled water delivery pipe.

6. The energy-saving system for extracting traditional Chinese medicine according to claim 5, characterized in that: The steam control unit comprises a pressure gauge, a pressure sensor, an angle seat regulating valve, a pneumatic diaphragm valve and a bypass stop valve.

7. A Chinese medicine extraction control method, applicable to the Chinese medicine extraction energy-saving system according to any one of claims 1 to 6, characterized in that: The following steps are involved: After the Chinese medicine is added into the extraction tank, a certain amount of purified water is injected according to the process requirements and the feed port is closed; According to the design requirements, pure steam that meets the requirements of the pharmacopoeia is used for heating, and the pressure is controlled at 0.25Mpa. At this time, the pure steam heats the material-water mixture in the extraction tank through the outer heating coil of the extraction tank. After condensation, the pure steam flows into the extraction tank through the pipeline and serves as a supplement for the feed liquid. As the temperature of the material-water mixture rises to between 98° and 100°, the temperature sensor transmits a signal, and the pure steam pressure is automatically adjusted to 0.02Mpa, and a constant temperature micro-boiling state begins. The constant temperature timing begins, and the control system automatically times the time according to the process requirements; The extraction tank enters a constant temperature and slightly boiling state. Purified water and chilled water for cooling work simultaneously to ensure that the pure steam generated in the slightly boiling state is cooled to 99°C and refluxed into the extraction tank. The chilled water cools the purified water to 17°C. The purified water cools the pure steam generated in the slightly boiling state, and the purified water temperature rises from 17°C to 99°C. At this time, the purified water at 99°C is added to the extraction tank as feed water. When the constant temperature and micro-boiling time ends, the extraction work is completed and the system stops working; After 5 minutes of shutdown, open the pneumatic valve to the duplex filter, and the water will enter the next process after being filtered.

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