Closed solution dehumidification air conditioning system for capsule drying process

Abstract

The utility model relates to capsule production field discloses a closed solution dehumidification air conditioning system for capsule drying process, including heat pump unit, solution regeneration unit, heat recovery unit, pre -dehumidification unit, solution dehumidification unit and temperature regulating unit, heat pump unit includes compressor, auxiliary radiator, condenser, expansion valve and evaporator, solution regeneration unit includes solution regeneration tower, regeneration pump and hot water heater, pre -dehumidification unit includes pre -cooling dehumidifier, solution dehumidification unit includes solution dehumidification tower, dehumidification pump and cold water cooler, temperature regulating unit includes thermostat, the utility model uses air closed type circulation processing, uses return air and regenerates solution, adopts the heat pump unit of hot and cold water same, and the operating condition energy efficiency is higher, and cold water is as system air dehumidification cold source, and hot water can assist solution regeneration in addition to satisfying drying line heat demand, reduces solution regeneration energy consumption, the system cost is low, and the operating energy consumption is low, and the economy is good, and the energy -conserving effect is remarkable.

Description

Technical Field

[0001] This utility model relates to the field of capsule production, specifically a closed-loop solution dehumidification air conditioning system for capsule drying process. Background Technology

[0002] Capsules are typically made of gelatin or other materials and filled with pharmaceuticals, nutrients, or food ingredients. During the production process, capsules undergo a drying process to remove moisture, ensuring their stability and integrity during storage and use. Production lines typically use circulating hot air to dry the capsules and are equipped with air heaters.

[0003] In existing technologies, heat-driven solution dehumidifiers are generally used. These dehumidifiers typically use cold water for dehumidification and fresh air to regenerate the solution. The heat source for regeneration is steam, and the heat source for heating the circulating air in the production line is electricity, hot water, or steam. These systems generally use lithium chloride solution, which is expensive, and the overall energy consumption of the system is high, resulting in poor economic efficiency. Summary of the Invention

[0004] The technical problem to be solved by this utility model is to overcome the above-mentioned technical defects and provide a closed-loop solution dehumidification air conditioning system for capsule drying process.

[0005] To solve the above problems, the technical solution of this utility model is: a closed-loop solution dehumidification air conditioning system for capsule drying process, including a heat pump unit, a solution regeneration unit, a heat recovery unit, a pre-dehumidification unit, a solution dehumidification unit and a temperature control unit, wherein the heat pump unit provides a cold source and a heat source for the system and provides a heat source for the drying line;

[0006] The heat pump unit is used to simultaneously produce cold water and hot water, including a compressor, an auxiliary radiator, a condenser, an expansion valve, and an evaporator. The produced cold water is used as a cold source for system air dehumidification, and the hot water is used as a heat source for solution regeneration, air supply temperature control, and production line drying. Excess heat is discharged by the auxiliary radiator. The condenser is provided with a hot water supply end and a hot water return end, and the evaporator is provided with a cold water supply end and a cold water return end.

[0007] A solution regeneration unit includes a solution regeneration tower, a regeneration pump connected to the bottom of the solution regeneration tower, the regeneration pump conveying the solution at the bottom of the tower to the top spray, and a hot water heater connected to the output end of the regeneration pump;

[0008] The heat recovery unit includes a heat recovery cooler and a heat recovery heater. The heat recovery cooler and the heat recovery heater are respectively disposed on one side of the solution regeneration unit and the solution dehumidification unit. The heat recovery cooler recovers the heat of the air after solution regeneration and transfers it to the heat recovery heater for preheating the air after solution dehumidification.

[0009] The pre-dehumidification unit includes a pre-cooling dehumidifier, which performs preliminary pre-cooling and dehumidification of the air;

[0010] The solution dehumidification unit includes a solution dehumidification tower, the bottom of which is connected to a dehumidification pump. The dehumidification pump delivers the solution at the bottom of the tower to the top spray, and the output end of the dehumidification pump is connected to a cold water cooler.

[0011] The temperature control unit includes a temperature controller, which is located on one side of the heat recovery heater to heat the air.

[0012] The system's airflow includes a fresh air inlet located on one side of the pre-cooling dehumidifier, an exhaust outlet located on one side of the thermostat, a drying line located between the exhaust outlet and the thermostat, and a return air path between the fresh air inlet and the exhaust outlet. The return air path passes through the solution regeneration tower and the heat recovery cooler. The airflow includes a fresh air valve at the fresh air inlet, a return air valve at the return air path, and an exhaust valve at the exhaust outlet. The airflow ratios can be adjusted as needed.

[0013] Furthermore, the hot water heater is connected to the hot water supply end and the hot water return end of the heat pump unit.

[0014] Furthermore, the pre-cooling dehumidifier is connected to the cold water supply end and the cold water return end of the heat pump unit.

[0015] Furthermore, the chilled water cooler is connected to the chilled water supply end and the chilled water return end of the heat pump unit.

[0016] Furthermore, the output end of the dehumidification pump is connected to a solution heat recovery heat exchanger, and the output end of the regeneration pump is connected to the solution dehumidification tower via the solution heat recovery heat exchanger.

[0017] Furthermore, the thermostat is connected to the hot water supply end and the hot water return end of the heat pump unit.

[0018] The advantages of this invention compared to existing technologies are as follows: This invention uses a closed-loop air circulation system and a return air regeneration solution; it employs a heat pump unit with both cold and hot water output, resulting in high energy efficiency during operation; cold water serves as the system's air dehumidification cold source, while hot water, in addition to meeting the heat requirements of the drying line, can also assist in solution regeneration, reducing energy consumption during solution regeneration; it uses calcium chloride solution for dehumidification, which is inexpensive and readily available; the system has low cost, low operating energy consumption, excellent economic efficiency, and significant energy-saving effect. Attached Figure Description

[0019] Figure 1 This is a system architecture diagram of this utility model.

[0020] As shown in the figure: 11. Compressor; 12. Auxiliary radiator; 13. Condenser; 14. Expansion valve; 15. Evaporator;

[0021] 21. Solution regeneration tower; 22. Regeneration pump; 23. Hot water heater;

[0022] 31. Heat recovery cooler; 32. Heat recovery heater;

[0023] 41. Pre-cooling dehumidifier;

[0024] 51. Solution dehumidification tower; 52. Dehumidification pump; 53. Cold water cooler; 54. Solution heat recovery heat exchanger;

[0025] 61. Thermostat;

[0026] 71. Fresh air valve; 72. Exhaust air valve; 73. Return air valve. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0028] A closed-loop solution dehumidification air conditioning system for capsule drying process includes a heat pump unit, a solution regeneration unit, a heat recovery unit, a pre-dehumidification unit, a solution dehumidification unit, and a temperature control unit. The units are arranged in the following order along the airflow direction: Figure 1 As shown.

[0029] The heat pump unit includes a compressor 11, an auxiliary radiator 12, a condenser 13, an expansion valve 14, and an evaporator 15. It is used to simultaneously produce cold water and hot water. The cold water is used as a cold source for system air dehumidification, and the hot water is used as a heat source for solution regeneration, air supply temperature control, and production line drying. Excess heat is discharged by the auxiliary radiator 12.

[0030] The solution regeneration unit includes a solution regeneration tower 21, in which air and solution come into contact with each other in the packing material of the tower. The air removes moisture from the solution, and the solution is concentrated and regenerated. A regeneration pump 22 transports the solution from the bottom of the tower to the top spray. A hot water heater 23 uses hot water from the heat pump unit to heat the solution and increase the temperature of the sprayed solution.

[0031] The heat recovery unit includes a heat recovery cooler 31 and a heat recovery heater 32. The heat of the air after the solution is regenerated is recovered by the 31 and transferred to the heat recovery heater 32 for preheating of the dehumidified air.

[0032] The pre-dehumidification unit includes a pre-cooling dehumidifier 41, which introduces cold water prepared by the heat pump unit to perform preliminary pre-cooling and dehumidification of the air;

[0033] The solution dehumidification unit includes a solution dehumidification tower 51, in which air and solution come into contact with each other in the packing material, the air is dehumidified and the solution is diluted; a dehumidification pump 52, which transports the solution from the bottom of the tower to the top spray; a cold water cooler 53, which uses cold water from the heat pump unit to cool the solution and reduce the temperature of the sprayed solution; and a solution heat recovery heat exchanger 54, which recovers the heat exchanged between the dehumidification solution and the regeneration solution to reduce heat loss.

[0034] The temperature control unit, including thermostat 61, introduces hot water prepared by the heat pump unit to heat the air to meet the required air supply temperature.

[0035] The system's air duct includes a fresh air inlet located on one side of the pre-cooling dehumidifier 41, an exhaust outlet located on one side of the thermostat 61, a drying line located between the exhaust outlet and the thermostat 61, and a return air duct between the fresh air inlet and the exhaust outlet. The return air duct passes through the solution regeneration tower 21 and the heat recovery cooler 31. The air duct has a fresh air valve 71 at the fresh air inlet, a return air valve 73 at the return air duct, and an exhaust valve 72 at the exhaust outlet. The air volume ratio can be adjusted according to requirements.

[0036] The return air from the drying line first enters the solution regeneration tower 21. The solution at the bottom of the solution regeneration tower 21 is heated by hot water heater 23 and then sprayed, carrying away the moisture in the solution with the air. The regenerated air then enters the heat recovery cooler 31 for cooling, and the heat is transferred to the heat recovery heater 32. The air after the heat recovery cooler 31 is mixed with some fresh air. The mixed air passes through the pre-cooling dehumidifier 41 for preliminary cooling and dehumidification with cold water, and then passes through the solution dehumidification tower 51. The solution at the bottom of the solution dehumidification tower 51 is cooled by cold water cooler 53 and then sprayed. The air after the pre-cooling dehumidifier 41 undergoes further solution dehumidification to meet the required air humidity. It is then preheated by the heat recovery heater 32 and reheated by hot water in the thermostat 61 to regulate the temperature before being sent to the drying line. Calcium chloride solution is sufficient to meet the requirements for dehumidification. The dehumidification pump 52 and the regeneration pump 22 are branched off to provide interstage flow solution between the solution dehumidification tower and the solution regeneration tower to maintain concentration balance, and a solution heat recovery heat exchanger 54 is installed to reduce energy loss. The hot water temperature of the heat pump unit is mainly to meet the drying needs of the capsule production line. Generally, 45℃ hot water is sufficient. At this temperature, the heat pump unit operates with high energy efficiency. Excess heat from the hot water in the heat pump unit is discharged through I2.

[0037] This invention employs a closed-loop air circulation system. The return air first regenerates the solution, then sequentially passes through heat recovery for cooling, cold water pre-cooling and dehumidification, solution dehumidification, heat recovery for preheating, and reheat regulation before being fed into the drying line. The cold source for cold water pre-cooling and solution dehumidification, and the heat source for solution regeneration, reheat regulation, and the drying line, all originate from a heat pump unit with both cold and hot water outlets. The system has low cost and low energy consumption, and can meet dehumidification requirements using inexpensive calcium chloride solution, offering economic and energy-saving advantages.

[0038] The parts not disclosed in this utility model are all prior art, and their specific structures and working principles will not be described in detail.

[0039] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0040] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

[0041] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A closed-loop solution dehumidification air conditioning system for capsule drying process, characterized in that: It includes a heat pump unit, a solution regeneration unit, a heat recovery unit, a pre-dehumidification unit, a solution dehumidification unit, and a temperature control unit. The heat pump unit provides a cold source and a heat source for the system, and also provides a heat source for the drying line. A heat pump unit for simultaneously producing cold and hot water includes a compressor (11), an auxiliary radiator (12), a condenser (13), an expansion valve (14), and an evaporator (15). The condenser (13) is provided with a hot water supply end (131) and a hot water return end (132), and the evaporator (15) is provided with a cold water supply end (151) and a cold water return end (152). The solution regeneration unit includes a solution regeneration tower (21), the bottom of which is connected to a regeneration pump (22), which transports the solution at the bottom of the tower to the top spray, and the output end of the regeneration pump (22) is connected to a hot water heater (23). The heat recovery unit includes a heat recovery cooler (31) and a heat recovery heater (32). The heat recovery cooler (31) and the heat recovery heater (32) are respectively disposed on one side of the solution regeneration unit and the solution dehumidification unit. The heat recovery cooler (31) recovers the heat of the air after solution regeneration and transfers it to the heat recovery heater (32) for preheating the air after solution dehumidification. The pre-dehumidification unit includes a pre-cooling dehumidifier (41) for pre-cooling and dehumidifying the air; The solution dehumidification unit includes a solution dehumidification tower (51), the bottom of which is connected to a dehumidification pump (52), which transports the solution at the bottom of the tower to the top spray, and the output end of the dehumidification pump (52) is connected to a cold water cooler (53). The temperature control unit includes a temperature controller (61), which is located on one side of the heat recovery heater (32) to heat the air.

2. The closed-loop solution dehumidification air conditioning system for capsule drying process according to claim 1, characterized in that: The hot water heater (23) is connected to the hot water supply end (131) and the hot water return end (132) of the heat pump unit.

3. A closed-loop solution dehumidification air conditioning system for capsule drying process according to claim 2, characterized in that: The precooling dehumidifier (41) is connected to the cold water supply end (151) and the cold water return end (152) of the heat pump unit.

4. A closed-loop solution dehumidification air conditioning system for capsule drying process according to claim 3, characterized in that: The chilled water cooler (53) is connected to the chilled water supply end (151) and the chilled water return end (152) of the heat pump unit.

5. A closed-loop solution dehumidification air conditioning system for capsule drying process according to claim 4, characterized in that: A solution heat recovery heat exchanger (54) is connected between the output end of the dehumidification pump (52) and the solution regeneration tower (21), and the output end of the regeneration pump (22) and the solution dehumidification tower (51) are connected to the solution heat recovery heat exchanger (54).

6. A closed-loop solution dehumidification air conditioning system for capsule drying process according to claim 5, characterized in that: The thermostat (61) is connected to the hot water supply end (131) and the hot water return end (132) of the heat pump unit.

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