Heat energy utilization system for daily chemical product generation line

Abstract

The utility model relates to the technical field of heat energy utilization, in particular to a heat energy utilization system for a daily chemical product generating line, the daily chemical product generating line comprises a cold water tank capable of storing low-temperature water, a refrigerating machine for providing cooling capacity for the low-temperature water and a hot water tank capable of storing high-temperature water, and the heat energy utilization system comprises a heat pump. The heat pump is provided with a compressor, a condenser, a throttling valve and an evaporator, the compressor, the condenser, the throttling valve and the evaporator are in fluid communication in sequence and form an inner circulation loop allowing a circulation medium to flow, and the condenser is in fluid communication with the hot water tank and forms a first loop allowing high-temperature water to flow circularly. The condenser is used for heat exchange between high-temperature water and a circulating medium, the evaporator is in fluid communication with the refrigerating machine and forms a second loop for circulating flowing of the heat transfer medium, and the evaporator is used for heat exchange between the heat transfer medium and the circulating medium. The heat energy utilization system can improve the heat energy utilization rate of the daily chemical product generation line and reduce the steam consumption at the same time.

Description

Technical Field

[0001] The utility model relates to the technical field of heat energy utilization, in particular to a heat energy utilization system for a daily chemical product production line. Background Art

[0002] A daily chemical product production line refers to a series of automated or semi-automated production equipment and machinery for producing daily chemical products (such as personal care products, cosmetics, cleaning products, etc.). These production lines usually include multiple processes such as raw material processing, mixing, formulation, filling, encapsulation, label attachment, packaging, and inspection.

[0003] When the daily chemical product production line is in production operation, it needs to use low-temperature water at 3 - 5°C and high-temperature water at 90°C simultaneously. For this reason, a cold water tank for storing low-temperature water, a refrigerator, and a hot water tank for temporarily storing high-temperature water are configured on the production line. The refrigerator maintains the temperature of the low-temperature water by transferring part of the heat of the low-temperature water outwards. In the traditional daily chemical product production line, the above-mentioned part of the heat is finally directly discharged into the ambient air through a cooling tower. At the same time, the traditional daily chemical product production line uses direct steam heating to transfer heat to the high-temperature water, and its heat energy utilization rate needs to be further improved. Summary of the Utility Model

[0004] In order to solve the technical problem that the heat energy utilization rate of the above-mentioned traditional daily chemical product production line needs to be further improved, the purpose of the utility model is to provide a heat energy utilization system for a daily chemical product production line.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions: A heat energy utilization system for a daily chemical product production line, the daily chemical product production line includes a cold water tank for storing low-temperature water, a refrigerator for providing cold energy for the low-temperature water, and a hot water tank for storing high-temperature water. The heat energy utilization system includes a heat pump, the heat pump has a compressor, a condenser, a throttle valve, and an evaporator. The compressor, the condenser, the throttle valve, and the evaporator are sequentially fluidly connected and form an internal circulation loop for the circulating medium to flow. The condenser is fluidly connected to the hot water tank and forms a first loop for the high-temperature water to circulate. The condenser supplies the high-temperature water to exchange heat with the circulating medium. The evaporator is fluidly connected to the refrigerator and forms a second loop for the heat transfer medium to circulate. The evaporator supplies the heat transfer medium to exchange heat with the circulating medium.

[0006] In the above technical solution, preferably, the heat energy utilization system further includes a hot water storage tank for temporarily storing the heat transfer medium. The refrigerator is fluidly connected to the hot water storage tank and forms a third loop for the heat transfer medium to circulate. The hot water storage tank is fluidly connected to the evaporator and forms a fourth loop for the heat transfer medium to circulate.

[0007] In the above preferred solution, further preferably, the heat energy utilization system further includes at least one electromagnetic valve disposed between the hot water storage tank and the chiller and capable of blocking the third circuit. A thermometer is disposed on the hot water storage tank. The at least one electromagnetic valve is signal-connected to the thermometer and the heat pump to selectively block the third circuit based on the feedback of the thermometer and the heat pump.

[0008] In the above preferred solution, further preferably, the hot water storage tank is filled with a heat storage medium.

[0009] In the above technical solution, preferably, the heat energy utilization system further includes a solar water heater. The hot water tank is in fluid communication with the solar water heater to form a fifth circuit for high-temperature water circulation.

[0010] Compared with the prior art, the heat energy utilization system provided by the technical solution of the present invention recovers the heat transferred outward by the chiller through the heat pump and transfers this part of the heat to the high-temperature water, while improving the heat energy utilization rate of the daily chemical product production line and reducing the steam usage. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the system of the daily chemical product production line provided by the present invention;

[0012] Figure 2 It is a schematic diagram of the system with the same heat energy utilization provided by the present invention.

[0013] Labels in the figure:

[0014] 10, cold water tank; 20, chiller; 30, cooling tower; 40, chemical reaction zone; 50, hot water tank; 60, steam supply module; 70, heat exchanger;

[0015] 11, compressor; 12, condenser; 13, expansion valve; 14, evaporator;

[0016] 2, hot water storage tank; 21, electromagnetic valve; 22, thermometer;

[0017] 3, solar water heater; 4, hot water pump. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] To describe in detail the technical content, structural features, achieved objectives and functions of the present application, the technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings in the embodiments of the present application.

[0019] In this application, spatial relative terms such as "under", "below", "beneath", "lower", "above", "upper", "on", "higher", "side" (e.g., as in "side wall") are used to describe the relationship of one element to another (other) element as shown in the drawings. The spatial relative terms are intended to include different orientations of the device in use, operation, and / or manufacture in addition to the orientation depicted in the drawings. For example, if the device in the drawings is flipped, an element described as "under" or "beneath" another element or feature will then be positioned "above" the said other element or feature. Thus, the exemplary term "under" can include both the above and below orientations. In addition, the device can be positioned otherwise (e.g., rotated 90 degrees or at other orientations), and accordingly, the spatial relative descriptors used herein are to be interpreted.

[0020] The utility model provides a heat energy utilization system for a daily chemical product production line, and the heat energy utilization system aims to improve the heat energy utilization rate of the daily chemical product production line. For ease of description, a brief introduction to the daily chemical product production line is given below.

[0021] As Figure 1 shown, the daily chemical product production line has a cold water tank 10 for storing low-temperature water (3 - 5 °C), a refrigerator 20 for providing cold energy to the cold water tank, a cooling tower 30 for heat exchange with ambient air, and a plurality of chemical reaction zones 40. The cold water tank 10 is in fluid communication with the chemical reaction zone 40 to provide the necessary low-temperature water for production to the chemical reaction zone 40.

[0022] A first circuit for circulating low-temperature water is formed between the cold water tank 10 and the refrigerator 20, and a second circuit for circulating a heat transfer medium (generally water) is formed between the refrigerator 20 and the cooling tower 30. The refrigerator 20 transfers part of the heat of the low-temperature water from the cold water tank 10 to the heat transfer medium (i.e., provides cold energy to the low-temperature water), and then this part of the heat and the heat generated by the refrigerator 20 are transferred to the cooling tower 30 through the heat exchange medium, and finally directly discharged into the ambient air by the cooling tower 30. Among them, the cold energy provided to the cold water tank 10 includes the cold energy leaked during the storage of the low-temperature water in the cold water tank 10 and the cold energy required to cool the newly replenished normal-temperature water (generally treated tap water) to the low-temperature water. Since the above part of the heat is not utilized but directly discharged into the ambient air by the cooling tower 30, the heat utilization rate of the daily chemical product production line needs to be further improved.

[0023] In addition, the daily chemical product production line also requires high-temperature water at 90 °C as production water. Specifically, the daily chemical product production line has a hot water tank 50 for storing high-temperature water and a steam supply module 60 for heating the high-temperature water. The hot water tank 50 is in fluid communication with each chemical reaction zone 40 to supply the high-temperature water necessary for production to the chemical reaction zone 40. The steam supply module 60 provides heat to the high-temperature water through a heat exchanger 70 located between the hot water tank 50 and the chemical reaction zone 40 to ensure that the high-temperature water meets the temperature requirements when entering the chemical reaction zone 40.

[0024] Combined with Figure 2 , the heat energy utilization system provided by the present utility model can transfer part of the heat originally discharged into the ambient air by the cooling tower 30 to the high-temperature water, so as to improve the heat utilization rate of the daily chemical product production line and reduce the steam consumption.

[0025] Specifically, the heat energy utilization system at least includes a heat pump, and the heat pump includes a compressor 11, a condenser 12, an expansion valve 13 and an evaporator 14. The condenser 12 is in fluid communication with the hot water tank 50 and forms a third circuit for the high-temperature water to circulate between the condenser 12 and the hot water tank 50. The evaporator 14 is in fluid communication with the chiller 20 and forms a fourth circuit for the heat transfer medium to circulate between the chiller 20 and the evaporator 14.

[0026] The compressor 11, the condenser 12, the expansion valve 13 and the evaporator 14 are sequentially in fluid communication and form an internal circulation circuit for the circulating medium to circulate. The compressor 11 can compress the circulating medium fluid at high temperature and low pressure into a circulating medium fluid at high temperature and high pressure, and provide power for the circulating medium fluid to circulate in the circuit. The condenser 12 allows the circulating medium fluid to exchange heat with the high-temperature water as an external cold source, and makes the circulating medium fluid at high temperature and high pressure release heat to the outside and then transform into a circulating medium fluid at low temperature and high pressure. The expansion valve 13 can transform the circulating medium fluid at low temperature and high pressure into a circulating medium fluid at low temperature and low pressure through a throttling effect. Finally, the evaporator 14 allows the circulating medium fluid at low temperature and low pressure to exchange heat with the heat transfer medium as an external heat source here and transform into a circulating medium fluid at high temperature and low pressure. Thus, through the above cycle, the circulating medium transfers part of the heat of the external heat source to the external cold source, that is, recovers part of the heat originally discharged by the cooling tower 30 to the outside and uses it to heat the high-temperature water.

[0027] Furthermore, the heat pump starts only when the temperature of the high-temperature water in the hot water tank 50 drops to a certain critical point (such as 88 °C). During this period, the cooling tower 30 still directly discharges heat to the ambient air (that is, there is a problem of temporal mismatch between the cooling demand and the heat demand). For this reason, the present thermal energy utilization system is also equipped with a hot water storage tank 2 as an intermediate component. The hot water storage tank 2 is in fluid communication with the chiller 20 and forms a fifth circuit for the heat transfer medium to circulate. The evaporator 14 of the heat pump is in fluid communication with the hot water storage tank 2 and forms a sixth circuit for the heat transfer medium to circulate. During the operation of the heat pump, the temperature of the heat transfer medium in the hot water storage tank 2 continuously decreases; while during the period when the heat pump stops operating, the heat transfer medium coming from the chiller 20 continuously supplies the temperature of the medium in the hot water storage tank 2. Thus, a certain amount of heat can be temporarily stored in the hot water storage tank 2 to alleviate the problem of temporal mismatch between the cooling demand and the heat demand.

[0028] Still further, the hot water storage tank 2 is filled with a heat storage medium (the heat storage medium has a high heat capacity, high thermal conductivity and good thermal stability) to further increase the amount of heat that the hot water storage tank 2 can temporarily store.

[0029] Still further, to ensure the normal operation of the chiller 20 and prevent the chiller 20 from being unable to operate or even malfunctioning due to the too high return water temperature of the hot water storage tank 2 during the period when the heat pump stops. The present thermal energy utilization system is also equipped with a solenoid valve 21 disposed between the chiller 20 and the hot water storage tank 2 and a thermometer 22 disposed on the hot water storage tank 2. The solenoid valve 21 is located on the fifth circuit and blocks the fluid flow of the fifth circuit when closed. The solenoid valve 21 is simultaneously connected to the heat pump and the thermometer 22 on the hot water storage tank 2 in a signal connection, and the solenoid valve 21 can selectively block the fifth circuit based on the feedback of the heat pump and the thermometer 22. Specifically, the solenoid valve 21 is configured to close when the heat pump stops operating and the temperature in the hot water storage tank 2 reaches a critical temperature to block the fifth circuit.

[0030] Furthermore, the present thermal energy utilization system is also equipped with a solar water heater 3 and a hot water pump 4. The hot water tank 50, the hot water pump 4 and the solar water heater 3 are sequentially in fluid communication and form a seventh circuit for the high-temperature water to circulate. The solar water heater 3 can utilize solar energy to heat the high-temperature water to further reduce the amount of steam required by the daily chemical product production line.

[0031] The above embodiments are only for illustrating the technical concept and features of the present application, and the purpose is to enable those who are familiar with this technology to understand the content of the present application and implement it accordingly, and it cannot be used to limit the protection scope of the present application. Any equivalent changes or modifications made according to the spirit of the present application should be covered within the protection scope of the present application.

Claims

1. A heat energy utilization system for a daily chemical product production line, the daily chemical product production line comprising a cold water tank capable of storing low-temperature water, a refrigerator providing coldness for the low-temperature water, and a hot water tank capable of storing high-temperature water, characterized in that: The heat energy utilization system includes a heat pump, which has a compressor, a condenser, a throttle valve and an evaporator. The compressor, condenser, throttle valve and evaporator are fluidly connected in sequence and form an internal circulation loop for circulating medium. The condenser is fluidly connected to the hot water tank to form a first loop for circulating high-temperature water. The condenser provides heat exchange between high-temperature water and circulating medium. The evaporator is fluidly connected to the refrigerator to form a second loop for circulating heat transfer medium. The evaporator provides heat exchange between heat transfer medium and circulating medium.

2. The thermal energy utilization system according to claim 1, characterized in that: It also includes a hot water storage tank that can temporarily store heat transfer medium. The refrigerator is fluidly connected to the hot water storage tank to form a third circuit for circulating heat transfer medium. The hot water storage tank is fluidly connected to the evaporator to form a fourth circuit for circulating heat transfer medium.

3. The thermal energy utilization system according to claim 2, characterized in that: It also includes at least one solenoid valve disposed between the hot water storage tank and the refrigerator and capable of blocking the third circuit. The hot water storage tank is provided with a thermometer. The at least one solenoid valve signal connects the thermometer and the heat pump to selectively block the third circuit based on feedback from the thermometer and the heat pump.

4. The thermal energy utilization system according to claim 2, characterized in that: The hot water storage tank is filled with heat storage medium.

5. The thermal energy utilization system according to claim 1, characterized in that: It also includes a solar water heater. The hot water tank is fluidically connected to the solar water heater to form a fifth loop for circulating high-temperature water.

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