Water source heat pump drying system
By optimizing the refrigeration cycle and warm water treatment in the water tank of the water source heat pump drying system, the drying process is improved, solving the problems of high energy consumption and low efficiency in cement production, and achieving energy-saving and efficient drying results.
Patent Information
- Application Number
- CN202423297228.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2025-12-05
- Estimated Expiration
- 2034-12-31
AI Technical Summary
The existing steam drying method in cement production is energy-intensive, has low drying efficiency, and causes serious environmental pollution. High-temperature heating leads to energy waste, and excessive humidity affects heat transfer efficiency.
The water source heat pump drying system uses a combination of a refrigeration cycle loop, a preheating evaporation loop, a preheating air loop, and a cooling and dehumidification loop to preheat, dehumidify, and raise the temperature of the drying air using warm water in the water tank, thus optimizing the drying process.
It achieves energy conservation, improves drying efficiency, reduces humidity, ensures consistent drying temperature, and solves the problem of mismatched energy demand.
Smart Images
Figure CN223636510U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the field of drying device, concretely is a water source heat pump drying system. BACKGROUND
[0002] At present, steam drying method is widely used in cement production process, and the moisture in the cement raw material is removed in the drying chamber. First, steam drying method usually needs a large amount of fuel (such as natural gas, coal, etc.) to generate steam, which not only leads to high energy cost, but also brings significant carbon dioxide emission, which causes great burden to the environment. Secondly, the drying chamber is usually in a closed environment during the drying process, and the drying efficiency of the cement raw material is inhibited due to high humidity. The environment with too high humidity will reduce the heat transfer efficiency, resulting in unsatisfactory drying effect. In addition, the heat generated by the steam drying technology is generally supplied to the drying chamber by direct heating method. Although this high-temperature heating can effectively remove the moisture, due to the high heating temperature, it often leads to waste of energy. In summary, the existing heat pump drying system has the problems of poor drying effect and high energy consumption. SUMMARY
[0003] In order to overcome the defects in the prior art, the utility model embodiment provides a water source heat pump drying system, which is used to solve one or more of the above problems.
[0004] The embodiment of the present application discloses a water source heat pump drying system, which comprises a drying chamber, a drying air loop for circulating drying air in the drying chamber, a refrigeration cycle loop for heating the air loop, a water tank connected with a preheating evaporation loop, a preheating air loop and a cooling and dehumidifying loop, wherein the cooling and dehumidifying loop is used for cooling and dehumidifying the drying air in the drying air loop, the preheating evaporation loop is used for preheating the drying air in the drying air loop, and the preheating evaporation loop is used for increasing the temperature of the refrigerant in the refrigeration cycle loop.
[0005] Further, the drying air loop comprises a heat exchanger, a preheater and a condenser arranged in sequence along the circulating direction of the drying air.
[0006] Further, the refrigeration cycle loop is connected with the condenser, the refrigeration cycle loop is used for circulating and conveying refrigerant into the condenser, and the refrigeration cycle loop comprises a throttling valve, an evaporator and a compressor arranged in sequence.
[0007] Further, the preheating evaporation loop is connected with the evaporator, and the preheating evaporation loop further comprises an evaporation water pump.
[0008] Further, the preheating air circuit is in communication with the preheater, and the preheating air circuit further comprises a preheating water pump.
[0009] Further, the cooling and dehumidifying circuit is in communication with the heat exchanger, and the cooling and dehumidifying circuit further comprises a heat exchange water pump.
[0010] Further, the drying chamber is two, and the two drying chambers are respectively located on the two sides of the water tank.
[0011] Further, the water in the water tank is warm water with a temperature of 55-65 DEG C.
[0012] The beneficial effects of the present application are as follows:
[0013] 1. The water in the water tank is exchanged with the drying air in the drying air circuit before drying, so as to preheat the drying air in the drying chamber, thereby achieving the effect of saving energy consumption.
[0014] 2. The water in the water tank preheats the refrigeration cycle circuit, so that the evaporation temperature is increased, and the temperature of the refrigerant is also increased, thereby greatly shortening the temperature rising speed of the drying air in the drying chamber.
[0015] 3. The temperature and humidity of the drying air are reduced by the cooling and dehumidifying circuit, and then the preheater and the condenser are used for heating and sending back to the drying chamber, thereby accelerating the drying efficiency.
[0016] 4. The water in the water tank is cooled in part and heated in part during the flow process, so that the water in the water tank can maintain a consistent temperature, thereby solving the problem of mismatching of energy requirements in different drying stages.
[0017] In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the following preferred embodiments are described in detail below, and the accompanying drawings are described as follows. BRIEF DESCRIPTION OF DRAWINGS
[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.
[0019] Figure 1 is a structure schematic view of a water source heat pump drying system in the first embodiment of the present application;
[0020] Figure 2is a use state diagram of the water source heat pump drying system under the first embodiment in the embodiment of the utility model,
[0021] Figure 3 is another use state diagram of the water source heat pump drying system under the first embodiment in the embodiment of the utility model,
[0022] Figure 4 is a structure schematic diagram of the water source heat pump drying system under the second embodiment in the embodiment of the utility model,
[0023] Figure 5 is a use state diagram of the water source heat pump drying system under the second embodiment in the embodiment of the utility model,
[0024] The above figure's reference numerals: 1, drying chamber;2, drying air loop;21, heat exchanger;22, preheater;23, condenser;3, refrigeration cycle loop;31, throttling valve;32, evaporator;33, compressor;4, water tank;5, preheating evaporation loop;51, evaporative water pump;6, preheating air loop;61, preheating water pump;7, cooling and dehumidifying loop;71, heat exchange water pump. Specific implementation
[0025] The technical scheme in the embodiments of the utility model will be described clearly and completely below in conjunction with the drawings in the embodiments of the utility model, obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor are within the protection scope of the utility model.
[0026] As Figures 1 to 5 Described, a water source heat pump drying system of the embodiment, comprising:
[0027] Drying chamber 1, the drying chamber 1 is communicated with the drying air loop 2 for the drying air in its inside to flow, the both ends of the drying air loop 2 are communicated with the drying chamber 1, so that the drying air realizes the heat exchange effect with the outside via the drying air loop 2.
[0028] Refrigeration cycle loop 3, the refrigeration cycle loop 3 is used to heat the air loop, so that the temperature of the drying air in the drying air loop 2 can be improved, so that the drying air meets the drying temperature needs in the drying chamber 1.
[0029] A water tank 4 is in communication with the preheating evaporation circuit 5, the preheating air circuit 6 and the cooling and dehumidifying circuit 7 respectively, and water in the water tank 4 is used to dehumidify and cool the high-temperature drying air and to heat the drying air and the refrigerant in a low-temperature state. Preferably, the water in the water tank 4 is at a temperature of 55-65°C, so that the effects of cooling the high-temperature air and heating the low-temperature air and refrigerant can be achieved simultaneously.
[0030] The cooling and dehumidifying circuit 7 is used to cool and dehumidify the drying air in the drying air circuit 2, and the preheating evaporation circuit 5 is used to preheat the drying air in the drying air circuit 2 and to increase the temperature of the refrigerant in the refrigeration cycle circuit 3.
[0031] Specifically, the drying air circuit 2 comprises, in sequence along the flow direction of the drying air, a heat exchanger 21, a preheater 22 and a condenser 23. Thus, the drying air flowing out of the drying chamber 1 can be cooled and dehumidified by the heat exchanger 21 and then heated by the condenser 23, so that the drying air entering the drying chamber 1 meets the temperature requirements for drying. In addition, the preheater 22 can preheat the low-temperature drying air at the beginning of drying, so as to accelerate the drying air to reach the drying temperature.
[0032] Specifically, the refrigeration cycle circuit 3 is in communication with the condenser 23, and the refrigeration cycle circuit 3 is used to circulate and deliver the refrigerant to the condenser 23. The refrigeration cycle circuit 3 comprises, in sequence, a throttling valve 31, an evaporator 32 and a compressor 33, and the refrigeration cycle circuit 3 circulates the refrigerant, so that the flow of the refrigerant is controlled by the throttling valve 31, the low-temperature and low-pressure refrigerant is converted into high-temperature and high-pressure refrigerant by the compressor 33, then the high-temperature and high-pressure refrigerant is introduced into the condenser 23, the refrigerant in the condenser 23 is cooled by heat exchange, and the drying air around the condenser 23 is heated, so that the drying air reaches the drying temperature, and the cooled refrigerant is further cooled by the evaporator 32.
[0033] Specifically, the preheating evaporation circuit 5 is in communication with the evaporator 32, and the preheating evaporation circuit 5 further comprises an evaporating water pump 51, which is used to control the preheating of the evaporator 32 by water in the preheating evaporation circuit 5, so that the evaporator 32 can quickly reach the working temperature during operation.
[0034] Specifically, the preheated air circuit 6 is connected to the preheater 22. The preheated air circuit 6 also includes a preheated water pump 61, which is used to control the water in the preheated air circuit 6 to preheat the preheater 22. This allows the preheater 22 to preheat the drying air in the drying air circuit 2 during operation, thereby accelerating the drying air to reach the drying temperature.
[0035] Specifically, the cooling and dehumidification circuit 7 is connected to the heat exchanger 21. The cooling and dehumidification circuit 7 also includes a hot water pump 71, which is used to control the water in the cooling and dehumidification circuit 7 to cool the heat exchanger 21. Thus, during operation, the heat exchanger 21 can cool the drying air located in the drying air circuit 2, and at the same time cool the moisture in the drying air to a liquid state, thereby achieving the effect of dehumidifying and cooling the drying air.
[0036] Specifically, there are two drying chambers 1, which are located on both sides of the water tank 4. That is, by combining the above-mentioned circuits and devices with one water tank 4, the effect of processing the two drying chambers 1 at the same time can be achieved.
[0037] Example 1:
[0038] like Figures 1 to 3 As shown, in this embodiment, there is one water tank 4 and one drying chamber 1, and the water temperature in the water tank 4 is 60°C.
[0039] During the work process, such as Figure 2 As shown, the throttling valve 31, the evaporating water pump 51, and the hot water exchange pump 71 are all in the closed state, with only the preheating water pump 61 open. The drying gas in the drying chamber 1 is at a low temperature at this time. The drying air in the drying air circuit 2 exchanges heat with the water in the water tank 4 through the preheater 22, thereby raising the temperature of the drying air in the drying chamber 1 to 50°C. Then, as... Figure 3 As shown, the evaporation water pump 51 is turned on, causing the water in the water tank 4 to preheat the evaporator 32, which in turn causes the temperature of the refrigerant flowing through the condenser 23 to rise rapidly, quickly raising the temperature of the drying air in the drying chamber 1 to 80°C. Then, the heat exchange water pump 71 is turned on, causing the drying air in the drying air circuit 2 to flow through the heat exchanger 21, thereby dehumidifying and cooling the drying air. The drying air then passes through the preheater 22 and condenser 23 for further heating, reaching the required drying temperature before entering the drying chamber 1. Throughout this process, because part of the water cools down while the other part heats up, the temperature of the water tank 4 is maintained at around 60°C, allowing for reuse.
[0040] Example 2:
[0041] like Figures 4 to 5As shown, in the present embodiment, the water tank 4 is one, the drying chamber 1 is two, and the water temperature in the water tank 4 is 60℃.
[0042] In the working process, the two throttling valves 31, the two evaporative water pumps 51, and the two heat exchange water pumps 71 are in the closed state, only the two preheating water pumps 61 are opened, and the drying gas in the two drying chambers 1 is in a low-temperature state at this time. The drying air in the two drying air circuits 2 respectively passes through the two preheaters 22 and the water in the water tank 4 to exchange heat, so that the temperature of the drying air in the two drying chambers 1 rises to 50℃. Then, the two evaporative water pumps 51 are opened, so that the water in the water tank 4 preheats the two evaporators 32, so that the temperature of the refrigerant flowing through the two condensers 23 rises rapidly, and the temperature of the drying air in the two drying chambers 1 reaches 80℃ rapidly. Then, the two heat exchange water pumps 71 are opened, so that the drying air in the two drying air circuits 2 respectively flows through the two heat exchangers 21, thereby dehumidifying and cooling the drying air, and then the drying air respectively passes through the two preheaters 22 and the two condensers 23 to be heated, and when entering the two drying chambers 1, the drying temperature is also met. In the above entire process, due to the cooling of part of the water and the heating of another part of the water, the temperature of the water tank 4 is always maintained at about 60℃, so that it can be reused. Of course, the above-mentioned water pumps can also be opened at different times.
[0043] By the above structure, the following effects are achieved:
[0044] 1. By exchanging heat between the water in the water tank 4 and the drying air in the drying air circuit 2 before drying, the drying air in the drying chamber 1 is preheated, achieving the effect of saving energy.
[0045] 2. The water in the water tank 4 preheats the refrigeration cycle circuit 3, so that the evaporation temperature rises, and the temperature of the refrigerant also rises, thereby greatly shortening the heating speed of the drying air in the drying chamber 1.
[0046] 3. The temperature and humidity of the drying air are reduced by the cooling and dehumidifying circuit 7, and then heated by the preheater 22 and the condenser 23 and sent back to the drying chamber 1, thereby accelerating the drying efficiency.
[0047] 4. Part of the water in the water tank 4 is cooled, and another part of the water is heated, so that the temperature of the water in the water tank 4 is kept consistent, solving the problem of mismatching of energy demand in different stages of drying.
[0048] The principle and implementation mode of the present application are described by using specific examples, and the above examples are only used to help understand the method and core idea of the present application; meanwhile, for those skilled in the art, the specific implementation mode and application range will be changed according to the idea of the present application, and the above description should not be understood as a limitation on the present application.
Claims
1. A water source heat pump drying system, characterized by, Comprise: A drying chamber, which is communicated with a drying air circuit for circulating drying air inside the drying chamber, both ends of the drying air circuit are communicated with the drying chamber; A refrigeration cycle circuit for heating the air circuit; A water tank, which is respectively communicated with a preheating evaporation circuit, a preheating air circuit and a cooling and dehumidifying circuit; Among them, the cooling and dehumidifying circuit is used for cooling and dehumidifying the drying air in the drying air circuit, the preheating evaporation circuit is used for preheating the drying air in the drying air circuit, and the preheating evaporation circuit is used for increasing the temperature of the refrigerant in the refrigeration cycle circuit.
2. The water source heat pump drying system of claim 1, wherein, The drying air circuit comprises a heat exchanger, a preheater and a condenser arranged in sequence inside the drying air circulation direction.
3. The water source heat pump drying system of claim 2, wherein, The refrigeration cycle circuit is communicated with the condenser, the refrigeration cycle circuit is used for circulating and conveying refrigerant into the condenser, and the refrigeration cycle circuit comprises a throttle valve, an evaporator and a compressor arranged in sequence.
4. The water source heat pump drying system of claim 3, wherein, The preheating evaporation circuit is communicated with the evaporator, and the preheating evaporation circuit further comprises an evaporation water pump.
5. The water source heat pump drying system of claim 2, wherein, The preheating air circuit is communicated with the preheater, and the preheating air circuit further comprises a preheating water pump.
6. The water source heat pump drying system of claim 2, wherein, The cooling and dehumidifying circuit is communicated with the heat exchanger, and the cooling and dehumidifying circuit further comprises a heat exchange water pump.
7. The water source heat pump drying system of claim 1, wherein, The drying chamber is two, two drying chambers are respectively located on both sides of the water tank.
8. The water source heat pump drying system of claim 1, wherein, The water tank is 55~65℃ warm water.