A drug concentration and drying device

Abstract

The present invention discloses a drug concentration and drying device, which relates to the technical field of drug production, and includes a first-effect evaporator, a first absorption heat pump, a second absorption refrigerator, a shaping mechanism and a drying chamber, wherein the first absorption heat pump is respectively connected to one end of the first-effect evaporator and the second absorption refrigerator through a pipeline, and the other end of the second absorption refrigerator is connected to a heating mechanism in the air duct of the drying chamber through a pipeline, and the drug stock solution enters the shaping mechanism and the drying chamber in sequence after being heated by the first-effect evaporator. The present invention can not only greatly reduce the large amount of steam consumed in the drug production process and reduce the consumption of fossil energy, but also utilize a large amount of low-temperature waste heat resources generated, and at the same time connect the downstream drug drying, greatly improve the utilization of energy in the drug production process, and reduce the production cost of the drug.

Description

Technical Field

[0001] The present invention relates to the technical field of pharmaceutical production, and particularly to a device for concentrating and drying drugs. Background Art

[0002] China is a large country in pharmaceutical production and consumption, with a very large pharmaceutical market scale. According to relevant data, the scale of China's pharmaceutical market will reach 120 billion US dollars in 2020 and may become the world's largest pharmaceutical consumer country. However, the overall pharmaceutical manufacturing industry in China is still in the middle and low-end stages, with relatively low technical content. A large amount of fossil energy is used for a long time in the production and manufacturing of pharmaceuticals, resulting in huge energy consumption. Therefore, energy conservation and cost reduction in the pharmaceutical industry are extremely urgent. Summary of the Invention

[0003] The object of the present invention is to provide a device for concentrating and drying drugs, which can not only greatly reduce the large amount of steam consumed in the drug production process, reduce the consumption of fossil energy, but also utilize a large amount of low-temperature waste heat resources generated, and at the same time connect the downstream drug drying, greatly improving the energy utilization in the drug production process and reducing the production cost of drugs.

[0004] To achieve the above object, the present invention provides the following solution:

[0005] The present invention provides a device for concentrating and drying drugs, including a first-effect evaporator, a first absorption heat pump, a second absorption chiller, a shaping mechanism and a drying chamber. The first absorption heat pump is respectively connected to one end of the first-effect evaporator and the second absorption chiller through pipelines. The other end of the second absorption chiller is connected to a heating mechanism in the air duct of the drying chamber through a pipeline. The drug stock solution is heated by the first-effect evaporator and then enters the shaping mechanism and the drying chamber in sequence.

[0006] Preferably, it further includes a first-effect steam heat exchanger, which is connected to the first-effect evaporator through a pipeline. The drug stock solution enters the first-effect evaporator after passing through the first-effect steam heat exchanger.

[0007] Preferably, the first absorption heat pump includes a first condenser, a first generator, a first absorber and a first evaporator. A driving heat source is introduced into the first generator to drive the first absorption heat pump to do work. The steam condensate inlet of the first absorber is connected to the first-effect evaporator through a pipeline. The steam condensate outlet of the first absorber is connected to the steam condensate inlet of the first condenser through a pipeline. The steam condensate outlet of the first condenser is connected to the first-effect evaporator through a pipeline. The secondary condensate inlet of the first evaporator is connected to the secondary condensate outlet of the first-effect steam heat exchanger through a pipeline. The secondary condensate outlet of the first evaporator is connected to the second absorption chiller through a pipeline.

[0008] Preferably, the first-effect evaporator includes a first-effect steam condensate outlet, a first-effect feed inlet, a first-effect hot condensate inlet, a first-effect secondary steam outlet, a first-effect secondary steam extraction inlet, and a first-effect liquid outlet. The first-effect feed inlet is communicated with the first-effect steam heat exchanger through a pipeline. The first-effect steam condensate outlet is communicated with the steam condensate inlet of the first absorber through a pipeline. The first-effect hot condensate inlet is communicated with the steam condensate outlet of the first condenser through a pipeline. The first-effect liquid outlet is communicated with the shaping mechanism through a pipeline. The steam generated in the first-effect evaporator is discharged through the first-effect secondary steam outlet. The first-effect secondary steam outlet is respectively communicated with the first-effect secondary steam extraction inlet and the steam inlet of the first-effect steam heat exchanger through pipelines.

[0009] Preferably, it further includes at least one second-effect steam heat exchanger. Each of the second-effect steam heat exchangers is communicated with each other through a pipeline and is also communicated with the first-effect steam heat exchanger through a pipeline. The original drug solution sequentially passes through each of the second-effect steam heat exchangers and the first-effect steam heat exchanger and then enters the first-effect evaporator.

[0010] Preferably, at least one second-effect evaporator is communicated on the pipeline between the first-effect evaporator and the shaping mechanism. The second-effect evaporator includes a second-effect steam condensate outlet, a second-effect liquid outlet, a second-effect hot condensate inlet, a second-effect secondary steam outlet, a second-effect secondary steam extraction inlet, and a second-effect feed inlet. The second-effect feed inlet is communicated with the first-effect liquid outlet through a pipeline. The second-effect liquid outlet is communicated with the shaping mechanism through a pipeline. The second-effect hot condensate inlet is communicated with the steam condensate outlet of the first condenser through a pipeline. The second-effect steam condensate outlet is communicated with the first-effect steam condensate outlet and then is communicated with the steam condensate inlet of the first absorber. The steam generated in the second-effect evaporator is discharged through the second-effect secondary steam outlet. One second-effect secondary steam outlet is respectively communicated with one second-effect secondary steam extraction inlet and the steam inlet of one second-effect steam heat exchanger through pipelines.

[0011] Preferably, a first condensate pump is arranged on the pipeline between the first-effect steam condensate outlet and the steam condensate inlet of the first absorber, and a second condensate pump is arranged on the pipeline between the second-effect steam condensate outlet and the steam condensate inlet of the first absorber.

[0012] Preferably, the second absorption refrigerating machine includes a second generator, a second condenser and a second absorber. A driving heat source is introduced into the second generator to drive the second absorption refrigerating machine to do work. The secondary steam condensate inlet of the second absorber is communicated with the secondary steam condensate outlet of the first evaporator through a pipeline. The secondary steam condensate outlet of the second absorber is communicated with the secondary steam condensate inlet in the second condenser through a pipeline. The secondary steam condensate outlet of the second condenser is communicated with the secondary steam condensate inlet of the heating mechanism through a pipeline. After the secondary steam condensate is heated to a set temperature by passing through the second absorber and the second condenser in sequence, it enters the heating mechanism to heat the incoming air in the air duct.

[0013] Preferably, the second absorption refrigerating machine further includes a second evaporator. A cooling mechanism is arranged upstream of the heating mechanism in the air duct. A fan is arranged between the cooling mechanism and the heating mechanism. A condensate pan for storing condensate water is arranged below the cooling mechanism. A circulating cooling medium passes through the second evaporator. The circulating cooling medium inlet of the second evaporator is communicated with the circulating cooling medium outlet of the cooling mechanism through a pipeline. The circulating cooling medium outlet of the second evaporator is communicated with the circulating cooling medium inlet of the cooling mechanism through a pipeline.

[0014] Preferably, the drying chamber further includes an air outlet, a plurality of conveyor belts and a finished product outlet. The air outlet is arranged downstream of the finished product outlet and is used for discharging wet air. The plurality of conveyor belts are arranged in layers and are used for conveying medicines. The finished product outlet is located at the end of the conveyor belt.

[0015] The present invention has achieved the following technical effects compared with the prior art:

[0016] When the drug concentration and drying device of the present invention works, the drug stock solution is concentrated by the first-effect evaporator and then enters the shaping mechanism and the drying chamber in sequence. The steam condensate in the first-effect evaporator exchanges heat with the drug stock solution and then enters the first absorption heat pump to be heated and then enters the first-effect evaporator again. The steam generated by the heat exchange between the drug stock solution and the steam condensate in the first-effect evaporator enters the second absorption refrigerating machine to increase in temperature and finally enters the heating mechanism in the air duct to heat the air in the air duct. The heated air is introduced into the drying chamber to dry the drug. The first absorption heat pump and the second absorption refrigerating machine work in a cycle, improving the energy utilization rate and achieving the effect of reducing the production cost of the drug. Description of the Drawings

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings required in the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0018] Figure 1 Structural schematic diagram of the drug concentration and drying device of the present invention;

[0019] Figure 2 Structural schematic diagram of the first-effect evaporator in the present invention;

[0020] Figure 3 Structural schematic diagram of the second-effect evaporator in the present invention;

[0021] Wherein: 1 - first-effect evaporator, 2 - second-effect evaporator, 3 - condensate pump one, 4 - condensate pump two, 5 - first-effect steam heat exchanger, 6 - second-effect steam heat exchanger, 7 - shaping mechanism, 8 - drying chamber, 9 - fan, 10 - first absorption heat pump, 11 - first condenser, 12 - first generator, 13 - first absorber, 14 - first evaporator, 15 - cooling mechanism, 16 - heating mechanism, 17 - condensate pan, 20 - second absorption chiller, 21 - second generator, 22 - second condenser, 23 - second evaporator, 24 - second absorber, 101 - first-effect steam condensate outlet, 102 - first-effect feed inlet, 103 - first-effect hot condensate inlet, 104 - first-effect secondary steam outlet, 105 - first-effect secondary steam extraction inlet, 106 - first-effect liquid outlet, 201 - second-effect steam condensate outlet, 202 - second-effect liquid outlet, 203 - second-effect hot condensate inlet, 204 - second-effect secondary steam outlet, 205 - second-effect secondary steam extraction inlet, 206 - second-effect feed inlet. Detailed implementation manners

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0023] The object of the present invention is to provide a drug concentration and drying device, which can not only greatly reduce the large amount of steam consumed in the drug production process, reduce the consumption of fossil energy, but also utilize the large amount of low-temperature waste heat resources generated, and at the same time connect the downstream drug drying, greatly improving the energy utilization in the drug production process and reducing the production cost of drugs.

[0024] To make the above objects, features, and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0025] As Figures 1 - 3 shown: This embodiment provides a drug concentration and drying device, including a first-effect evaporator 1, a first absorption heat pump 10, a second absorption chiller 20, a shaping mechanism 7, and a drying chamber 8. The first absorption heat pump 10 is respectively connected to one end of the first-effect evaporator 1 and the second absorption chiller 20 through pipelines. The other end of the second absorption chiller 20 is connected to a heating mechanism 16 in the air duct of the drying chamber 8 through a pipeline. The drug stock solution enters the shaping mechanism 7 and the drying chamber 8 in sequence after being heated by the first-effect evaporator 1. When the drug concentration and drying device of this embodiment works, the drug stock solution is concentrated by the first-effect evaporator 1 and then enters the shaping mechanism 7 and the drying chamber 8 in sequence. The steam condensate in the first-effect evaporator 1 exchanges heat with the drug stock solution and then enters the first absorption heat pump 10 to be heated and then enters the first-effect evaporator 1 again. The steam generated by the heat exchange between the drug stock solution and the steam condensate in the first-effect evaporator 1 enters the second absorption chiller 20 to increase in temperature, and finally enters the heating mechanism 16 in the air duct to heat the air in the air duct. The heated air is introduced into the drying chamber 8 to dry the drug. The first absorption heat pump 10 and the second absorption chiller 20 work in a cycle, improving the energy utilization rate and achieving the effect of reducing the production cost of drugs.

[0026] This embodiment further includes a first-effect steam heat exchanger 5. The first-effect steam heat exchanger 5 is connected to the first-effect evaporator 1 through a pipeline. The drug stock solution enters the first-effect evaporator 1 after passing through the first-effect steam heat exchanger 5.

[0027] In this embodiment, the first absorption heat pump 10 includes a first condenser 11, a first generator 12, a first absorber 13, and a first evaporator 14. A driving heat source is introduced into the first generator 12 to drive the first absorption heat pump 10 to do work. The steam condensate inlet of the first absorber 13 is connected to the first-effect evaporator 1 through a pipeline. The steam condensate outlet of the first absorber 13 is connected to the steam condensate inlet of the first condenser 11 through a pipeline. The steam condensate outlet of the first condenser 11 is connected to the first-effect evaporator 1 through a pipeline. The secondary condensate inlet of the first evaporator 1 is connected to the secondary condensate outlet of the first-effect steam heat exchanger 5 through a pipeline. The secondary condensate outlet of the first evaporator 1 is connected to the second absorption chiller 20 through a pipeline.

[0028] In this embodiment, the first-effect evaporator 1 includes a first-effect steam condensate outlet 101, a first-effect feed inlet 102, a first-effect hot condensate inlet 103, a first-effect secondary steam outlet 104, a first-effect secondary steam extraction inlet 105, and a first-effect liquid outlet 106. The first-effect feed inlet 102 is connected to the first-effect steam heat exchanger 5 through a pipeline. The first-effect steam condensate outlet 101 is connected to the steam condensate inlet of the first absorber 13 through a pipeline. The first-effect hot condensate inlet 103 is connected to the steam condensate outlet of the first condenser 11 through a pipeline. The first-effect liquid outlet 106 is connected to the shaping mechanism 7 through a pipeline. The steam generated in the first-effect evaporator 1 is discharged through the first-effect secondary steam outlet 104. The first-effect secondary steam outlet 104 is respectively connected to the first-effect secondary steam extraction inlet 105 and the steam inlet of the first-effect steam heat exchanger 5 through pipelines.

[0029] This embodiment further includes at least one second-effect steam heat exchanger 6, which is one in this embodiment. The second-effect steam heat exchanger 6 is connected to the first-effect steam heat exchanger 5 through a pipeline. The drug stock solution sequentially passes through the second-effect steam heat exchanger 6 and the first-effect steam heat exchanger 5 and then enters the first-effect evaporator 1. The second-effect steam heat exchanger 6 and the first-effect steam heat exchanger 5 have the same function, both of which are used to preheat the drug stock solution.

[0030] In this embodiment, at least one second-effect evaporator 2 is connected to the pipeline between the first-effect evaporator 1 and the shaping mechanism 7. There is one in this embodiment. The second-effect evaporator 2 includes a second-effect steam condensate outlet 201, a second-effect liquid outlet 202, a second-effect hot condensate inlet 203, a second-effect secondary steam outlet 204, a second-effect secondary steam extraction inlet 205, and a second-effect feed inlet 206. The second-effect feed inlet 206 is connected to the first-effect liquid outlet 106 through a pipeline. The second-effect liquid outlet 202 is connected to the shaping mechanism 7 through a pipeline. The second-effect hot condensate inlet 203 is connected to the steam condensate outlet of the first condenser 11 through a pipeline. The second-effect steam condensate outlet 201 is connected to the first-effect steam condensate outlet 101 through a pipeline and then connected to the steam condensate inlet of the first absorber 13. The steam generated in the second-effect evaporator 2 is discharged through the second-effect secondary steam outlet 204. The second-effect secondary steam outlet 204 is respectively connected to the second-effect secondary steam extraction inlet 205 and the steam inlet of the second-effect steam heat exchanger 6 through pipelines.

[0031] In this embodiment, a first condensate pump 3 is provided on the pipeline between the first-effect steam condensate outlet 101 and the steam condensate inlet of the first absorber 13, and a second condensate pump 4 is provided on the pipeline between the second-effect steam condensate outlet 201 and the steam condensate inlet of the first absorber 13. Both the first condensate pump 3 and the second condensate pump 4 are used for the pressure of the steam condensate in the pipeline.

[0032] In this embodiment, the second absorption chiller 20 includes a second generator 21, a second condenser 22, and a second absorber 24. A driving heat source is introduced into the second generator 21 to drive the second absorption chiller 20 to do work. The secondary steam condensate inlet of the second absorber 24 is communicated with the secondary steam condensate outlet of the first evaporator 14 through a pipeline. The secondary steam condensate outlet of the second absorber 24 is communicated with the secondary steam condensate inlet in the second condenser 22 through a pipeline. The secondary steam condensate outlet of the second condenser 22 is communicated with the secondary steam condensate inlet of the heating mechanism 16 through a pipeline. After the secondary steam condensate is heated to a set temperature by passing through the second absorber 24 and the second condenser 22 in sequence, it enters the heating mechanism 16 to heat the incoming air in the air duct.

[0033] In this embodiment, the driving heat sources introduced into the first generator 12 and the second generator 21 are steam or high-temperature water.

[0034] In this embodiment, the second absorption chiller 20 further includes a second evaporator 23. A cooling mechanism 15 is arranged upstream of the heating mechanism 16 in the air duct. A fan 9 is arranged between the cooling mechanism 15 and the heating mechanism 16. A condensate pan 17 for storing condensate is arranged below the cooling mechanism 15. A circulating cooling medium is passed through the second evaporator 23. The circulating cooling medium inlet of the second evaporator 23 is communicated with the circulating cooling medium outlet of the cooling mechanism 15 through a pipeline. The circulating cooling medium outlet of the second evaporator 23 is communicated with the circulating cooling medium inlet of the cooling mechanism 15 through a pipeline. In this embodiment, the circulating cooling medium is cooling water.

[0035] In this embodiment, the drying chamber 8 further includes an air outlet, a plurality of conveyor belts, and a finished product outlet. The air outlet is arranged downstream of the finished product outlet and is used to discharge the wet air. The plurality of conveyor belts are arranged in layers and are used to convey the medicines. The finished product outlet is located at the end of the conveyor belt.

[0036] When the drug concentration and drying device of this embodiment is working, the original drug solution is first preheated successively through the double-effect steam heat exchanger 6 and the single-effect steam heat exchanger 5, and then enters the single-effect evaporator 1 through the single-effect feed port 102. After heat exchange with the hot condensate entering through the single-effect hot condensate inlet 103 in the single-effect evaporator 1, the original drug solution after primary concentration enters the double-effect steam heat exchanger 6 through the single-effect liquid outlet 106 and the double-effect feed port 206 for heat exchange again. The original drug solution after secondary concentration flows out through the double-effect liquid outlet 202 and enters the shaping mechanism 7 for processing and shaping, and then enters the drying chamber 8; the hot condensate after heat exchange with the original drug solution in the single-effect evaporator 1 flows out through the single-effect steam condensate outlet 101, and the hot condensate after heat exchange with the original drug solution in the double-effect evaporator 2 flows out through the double-effect steam condensate outlet 201. The condensate water flowing out from the single-effect steam condensate outlet 101 and the double-effect steam condensate outlet 201 jointly flows into the steam condensate inlet of the first absorber 13 of the first absorption heat pump 10, the steam condensate outlet of the first absorber 13, the steam condensate inlet of the first condenser 11, and the steam condensate outlet of the first condenser 11 in sequence. The series connection of the first absorber 13 and the first condenser 11 raises the steam condensate to the set temperature and then respectively passes it into the single-effect hot condensate inlet 103 of the single-effect evaporator 1 and the double-effect hot condensate inlet 203 of the double-effect evaporator 2. The setting of the first absorption heat pump 10 improves the energy utilization rate and reduces the steam consumption; the secondary steam generated during the primary concentration of the original drug solution in the single-effect evaporator 1 flows out through the single-effect secondary steam outlet 104 and is divided into two paths. One path flows back into the single-effect evaporator 1 through the single-effect secondary steam extraction inlet 105 for heating and concentrating the original drug solution, and the other path enters the single-effect steam heat exchanger 5 through the pipeline for preheating the original drug solution; the secondary steam generated during the secondary concentration of the original drug solution in the double-effect evaporator 2 flows out through the double-effect secondary steam outlet 204 and is divided into two paths. One path flows back into the double-effect evaporator 2 through the double-effect secondary steam extraction inlet 205 for heating and concentrating the original drug solution, and the other path enters the double-effect steam heat exchanger 6 through the pipeline for preheating the original drug solution;The secondary steam entering the first-effect steam heat exchanger 5 and the second-effect steam heat exchanger 6 exchanges heat with the drug stock solution and forms steam condensate, which jointly enters the first evaporator 14 of the first absorption heat pump 10 through a pipeline. After the secondary steam condensate introduced into the first evaporator 14 absorbs the waste heat of the first generator 12, it successively passes through the secondary steam condensate inlet of the second absorber 24, the secondary steam condensate outlet of the second absorber 24, the secondary steam condensate inlet in the second condenser 22, and the secondary steam condensate outlet in the second condenser 22, and then enters the heating mechanism 16. After the secondary steam condensate is heated to the set temperature successively passing through the second absorber 24 and the second condenser 22, it enters the heating mechanism 16 to heat the incoming air in the air duct. A circulating cooling medium is passed through the evaporator, and the evaporator is connected to the cooling mechanism 15. The air introduced at the air duct inlet exchanges heat with the cooling mechanism 15, condensing the steam in the air into water droplets and dripping into the condensate pan 17, that is, the cooling mechanism 15 dehumidifies the air in the air duct, and the heating mechanism 16 heats the dehumidified air, thereby reducing the amount of steam required to heat and shape the drug.

[0037] In this embodiment, the steam condensate from the first-effect evaporator 1 and the second-effect evaporator 2 successively passes through the absorber and the condenser of the first absorption heat pump 10 and is heated and then introduced into the first-effect evaporator 1 and the second-effect evaporator 2 to generate steam. Part of the secondary steam generated by the first-effect evaporator 1 and the second-effect evaporator 2 is introduced into the first-effect steam heat exchanger 5 and the second-effect evaporator 2 to preheat the drug stock solution, and then the temperature decreases. Then it flows into the first evaporator 14 of the first absorption heat pump 10 to release heat and the temperature continues to decrease. Then it successively flows into the second absorber 24 and the second condenser 22 of the second absorption chiller 20 to absorb heat and the temperature increases. Finally, it flows into the heating mechanism 16 in the air duct to heat the incoming air and then flows out of the system. At the same time, the cooling medium introduced into the second absorption chiller 20 releases heat and cools down in the second evaporator 23 and then flows into the cooling mechanism 15 in the air duct to cool and dehumidify the incoming air and then returns to the second evaporator 23 to complete the cooling cycle. The first absorber 13 and the first condenser 11 of the first absorption heat pump 10 are used to heat the condensate generated by the first-effect evaporator 1 and the second-effect evaporator 2. The first evaporator 14 of the first absorption heat pump 10 heats the condensate generated after the secondary steam is condensed by being connected in series with the second absorber 24 and the second condenser 22 of the second absorption chiller 20. By the combined use of the first absorption heat pump 10 and the second absorption chiller 20, not only the waste heat of the condensate generated after the secondary steam is condensed is fully recovered, reducing the loss of low-temperature heat sources, but also the steam required for drug concentration can be generated, improving the energy utilization rate, reducing the energy consumption during the drug concentration process, with obvious energy-saving and cost-reducing effects, achieving the effect of reducing the production cost of drugs.

[0038] In this specification, specific examples are used to illustrate the principles and implementation manners of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention; at the same time, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation manners and application scopes. In summary, the content of this specification should not be construed as a limitation on the present invention.

Claims

1. A drug concentration and drying device, characterized in that: It comprises a first-effect evaporator, a first absorption heat pump, a second absorption refrigerator, a shaping mechanism and a drying chamber, wherein the first absorption heat pump is connected to one end of the first-effect evaporator and the second absorption refrigerator respectively through pipelines, and the other end of the second absorption refrigerator is connected to a heating mechanism in the air duct of the drying chamber through a pipeline, and the drug stock solution enters the shaping mechanism and the drying chamber in sequence after being heated by the first-effect evaporator; It also includes a first-effect steam heat exchanger, which is connected to the first-effect evaporator through a pipeline, and the drug stock solution enters the first-effect evaporator after passing through the first-effect steam heat exchanger; The first absorption heat pump comprises a first condenser, a first generator, a first absorber and a first evaporator, a driving heat source is introduced into the first generator to drive the first absorption heat pump to do work, a steam condensate inlet of the first absorber is connected to the first-effect evaporator through a pipeline, a steam condensate outlet of the first absorber is connected to the steam condensate inlet of the first condenser through a pipeline, a steam condensate outlet of the first condenser is connected to the first-effect evaporator through a pipeline, a secondary condensate inlet of the first evaporator is connected to the secondary condensate outlet of the first-effect steam heat exchanger through a pipeline, and a secondary condensate outlet of the first evaporator is connected to the second absorption refrigeration machine through a pipeline; The first-effect evaporator comprises a first-effect steam condensate outlet, a first-effect feed inlet, a first-effect hot condensate inlet, a first-effect secondary steam outlet, a first-effect secondary steam extraction inlet and a first-effect feed liquid outlet, the first-effect feed inlet is connected to the first-effect steam heat exchanger through a pipeline, the first-effect steam condensate outlet is connected to the steam condensate inlet of the first absorber through a pipeline, the first-effect hot condensate inlet is connected to the steam condensate outlet of the first condenser through a pipeline, the first-effect feed liquid outlet is connected to the shaping mechanism through a pipeline, the steam generated in the first-effect evaporator is discharged through the first-effect secondary steam outlet, and the first-effect secondary steam outlet is respectively connected to the first-effect secondary steam extraction inlet and the steam inlet of the first-effect steam heat exchanger through pipelines; The second absorption refrigerator comprises a second generator, a second condenser and a second absorber. A driving heat source is introduced into the second generator to drive the second absorption refrigerator to do work. The secondary steam condensate inlet of the second absorber is connected to the secondary steam condensate outlet of the first evaporator through a pipeline. The secondary steam condensate outlet of the second absorber is connected to the secondary steam condensate inlet of the second condenser through a pipeline. The secondary steam condensate outlet of the second condenser is connected to the secondary steam condensate inlet of the heating mechanism through a pipeline. After the secondary steam condensate is heated to a set temperature by passing through the second absorber and the second condenser in sequence, it enters the heating mechanism to heat the incoming air in the air duct.

2. The drug concentration and drying device according to claim 1, characterized in that: It also includes at least one second-effect steam heat exchanger, each of which is connected to the first-effect steam heat exchanger through a pipeline, and the drug stock solution passes through each of the second-effect steam heat exchangers and the first-effect steam heat exchanger in turn and then enters the first-effect evaporator.

3. The drug concentration and drying device according to claim 2, characterized in that: At least one second-effect evaporator is connected to the pipeline between the first-effect evaporator and the shaping mechanism, and the second-effect evaporator includes a second-effect steam condensate outlet, a second-effect feed liquid outlet, a second-effect hot condensate inlet, a second-effect secondary steam outlet, a second-effect secondary steam extraction inlet and a second-effect feed inlet. The second-effect feed inlet is connected to the first-effect feed liquid outlet through a pipeline, the second-effect feed liquid outlet is connected to the shaping mechanism through a pipeline, the second-effect hot condensate inlet is connected to the steam condensate outlet of the first condenser through a pipeline, the second-effect steam condensate outlet is connected to the first-effect steam condensate outlet through a pipeline, and then connected to the steam condensate inlet of the first absorber, the steam generated in the second-effect evaporator is discharged through the second-effect secondary steam outlet, and the second-effect secondary steam outlet is respectively connected to the second-effect secondary steam extraction inlet and the steam inlet of the second-effect steam heat exchanger through a pipeline.

4. The drug concentration and drying device according to claim 3, characterized in that: A condensate pump 1 is provided on the pipeline between the first-effect steam condensate outlet and the steam condensate inlet of the first absorber, and a condensate pump 2 is provided on the pipeline between the second-effect steam condensate outlet and the steam condensate inlet of the first absorber.

5. The drug concentration and drying device according to claim 1, characterized in that: The second absorption refrigeration machine also includes a second evaporator, a cooling mechanism is arranged upstream of the heating mechanism in the air duct, a fan is arranged between the cooling mechanism and the heating mechanism, a condensate pan for storing condensed water is arranged below the cooling mechanism, a circulating cooling medium passes through the second evaporator, the circulating cooling medium inlet of the second evaporator is connected to the circulating cooling medium outlet of the cooling mechanism through a pipeline, and the circulating cooling medium outlet of the second evaporator is connected to the circulating cooling medium inlet of the cooling mechanism through a pipeline.

6. The drug concentration and drying device according to claim 1, characterized in that: The drying chamber also includes an air outlet, a plurality of conveyor belts and a finished product outlet. The air outlet is arranged downstream of the finished product outlet and is used to discharge humid air. The plurality of conveyor belts are arranged in layers and are used to convey medicines. The finished product outlet is located at the end of the conveyor belts.

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