Lithium bromide solution concentration solar preheating system
By using a solar collector and condenser coil circulation loop, and utilizing R123 refrigerant phase change heat absorption medium to preheat the lithium bromide solution, the problem of high power consumption during the concentration process of lithium bromide solution is solved, achieving rapid preheating and energy-saving effects for the lithium bromide solution.
Patent Information
- Application Number
- CN202423250741.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-27
- Publication Date
- 2025-11-25
- Estimated Expiration
- 2034-12-27
AI Technical Summary
In the current production of lithium bromide solutions, the high energy consumption of electric heating during the solution concentration process leads to high economic costs.
The system employs a circulating loop consisting of solar collectors and condenser coils, using R123 refrigerant as the heat absorption medium. During the heat absorption and release process, a phase change occurs, and the lithium bromide solution is preheated by solar energy, thereby reducing energy consumption.
Rapid preheating of lithium bromide solution was achieved, reducing energy consumption during the concentration process and achieving the goal of energy conservation and emission reduction.
Smart Images
Figure CN223596220U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a lithium bromide solution concentrated solar energy preheating system. BACKGROUND
[0002] The lithium bromide solution is very widely used in various central air conditioners, heat pumps and humidifying units, and plays a vital role in maintaining the normal operation of these systems. In the production or regeneration of lithium bromide solution, a necessary link is solution concentration.
[0003] At present, the solution concentration operation in the production of lithium bromide solution mainly adopts the mature vacuum heating concentration method. In this process, the heating and temperature rising of lithium bromide solution become the main link of energy consumption, and the electric heating as the widely used temperature rising means at present has large energy consumption, resulting in high economic cost. UTILITY MODEL CONTENT
[0004] The main purpose of the utility model is to provide a lithium bromide solution concentrated solar energy preheating system to solve the problems in the above background technology.
[0005] The purpose of the utility model can be achieved by adopting the following technical scheme:
[0006] A lithium bromide solution concentrated solar energy preheating system, comprising a solar heat collecting plate, a heat exchange cylinder and a liquid storage barrel, a condensing coil is arranged in the heat exchange cylinder, the solar heat collecting plate and the condensing coil are connected to form a solar heat collecting circulation loop, the heat exchange cylinder and the liquid storage barrel are connected to form a lithium bromide solution circulation loop, a liquid adding pipe is arranged between the solar heat collecting plate and the condensing coil, and R123 refrigerant is filled in the liquid adding pipe.
[0007] Preferably, refrigerant inlet pipes and refrigerant outlet pipes are arranged on the two sides of the solar heat collecting plate, refrigerant inlet pipes and refrigerant outlet pipes are arranged at the two ends of the condensing coil, the refrigerant outlet pipe is connected with the refrigerant inlet pipe, and the refrigerant outlet pipe is connected with the refrigerant inlet pipe.
[0008] Preferably, the liquid adding pipe is arranged between the refrigerant outlet pipe and the refrigerant inlet pipe, and a refrigerant circulating pump is arranged between the liquid adding pipe and the refrigerant outlet pipe.
[0009] Preferably, a pressure sensor is arranged between the liquid adding pipe and the refrigerant inlet pipe.
[0010] Preferably, a suction pump is arranged between the refrigerant outlet pipe and the refrigerant inlet pipe.
[0011] Preferably, the upper and lower sides of the heat exchange cylinder are respectively provided with a heat exchange liquid inlet pipe and a heat exchange liquid outlet pipe, the upper and lower sides of the liquid storage barrel are respectively provided with a solution liquid inlet pipe and a solution liquid outlet pipe, the solution liquid outlet pipe is connected with the heat exchange liquid inlet pipe, and the heat exchange liquid outlet pipe is connected with the solution liquid inlet pipe.
[0012] Preferably, a solution circulating pump is arranged between the heat exchange liquid outlet pipe and the solution liquid inlet pipe.
[0013] Preferably, first and second temperature sensors are arranged on the heat exchange cylinder and the liquid storage barrel respectively.
[0014] Preferably, the solar heat collecting plate is provided with four pieces, and the four pieces of solar heat collecting plates are communicated through a heat collecting pipe, and a third temperature sensor is arranged on the heat collecting pipe.
[0015] The beneficial technical effects of the utility model are as follows:
[0016] The preheating system provided by the utility model uses R123 refrigerant as a heat absorption medium, can generate phase change in the heat absorption process, converts from liquid phase to gas phase, thereby can absorb a large amount of heat, the gas phase R123 refrigerant which has absorbed a large amount of heat enters the condensing coil, after meeting the lithium bromide solution, also generates phase change in the heat release process, converts from gas phase to liquid phase, thereby can release a large amount of heat, makes the lithium bromide solution be able to be preheated quickly, reduces the electric energy used in the concentration process due to heating, reaches the purpose of reducing cost and increasing efficiency. BRIEF DESCRIPTION OF DRAWINGS
[0017] Figure 1 The drawings show the structure of the embodiment of the utility model.
[0018] In the drawings: 1, solar heat collecting plate; 2, heat exchange cylinder; 3, liquid storage barrel; 4, condensing coil; 5, liquid adding pipe; 6, refrigerant liquid inlet pipe; 7, refrigerant gas outlet pipe; 8, refrigerant gas inlet pipe; 9, refrigerant liquid outlet pipe; 10, refrigerant circulating pump; 11, pressure sensor; 12, air pump; 13, heat exchange liquid inlet pipe; 14, heat exchange liquid outlet pipe; 15, solution liquid inlet pipe; 16, solution liquid outlet pipe; 17, solution circulating pump; 18, first temperature sensor; 19, second temperature sensor; 20, heat collecting pipe; 21, third temperature sensor. DETAILED DESCRIPTION
[0019] In order to make the skilled person in the art more clear and definite the technical scheme of the utility model, the utility model is described in further detail below in combination with embodiments and drawings, but the embodiment of the utility model is not limited to this.
[0020] For example, Figure 1As shown, the lithium bromide solution concentration solar preheating system provided by the embodiment includes a solar heat collecting plate 1, a heat exchange cylinder 2, and a liquid storage barrel 3. The heat exchange cylinder 2 is provided with a condensing coil 4. The solar heat collecting plate 1 is connected with the condensing coil 4 to form a solar heat collecting circulation loop. The heat exchange cylinder 2 and the liquid storage barrel 3 are connected to form a lithium bromide solution circulation loop. The solar heat collecting plate 1 and the condensing coil 4 are provided with a liquid adding pipe 5. The liquid adding pipe 5 is filled with R123 refrigerant.
[0021] The solar heat collecting plate 1 is vacuumized so that only the filled R123 refrigerant exists in the solar heat collecting plate 1. After passing through the solar heat collecting plate 1, the R123 refrigerant absorbs a large amount of heat and changes from liquid to gas. Then, the gaseous R123 refrigerant enters the condensing coil 4, releases a large amount of heat, changes from gas to liquid, and returns to the solar heat collecting plate 1 to absorb heat. In the heat exchange cylinder 2, there is lithium bromide solution from the liquid storage barrel 3. The lithium bromide solution absorbs a large amount of heat released by the gaseous R123 refrigerant, and the temperature rises. The lithium bromide solution with a rising temperature returns to the liquid storage barrel 3 to mix with the heated lithium bromide solution. The above steps are repeated until the lithium bromide solution is preheated to the required temperature.
[0022] The R123 refrigerant is used as the heat absorbing medium, which can produce phase change in the heat absorbing and releasing process, thereby absorbing and releasing a large amount of heat. The heat absorbing and releasing capacity is about 400 times that of a medium without phase change capacity, so that the lithium bromide solution can be quickly preheated.
[0023] After the 50% concentration lithium bromide solution is preheated from 20°C to 70°C, about 30 kilocalories of heat per kilogram of solution can be saved in the subsequent concentration process, thereby achieving the purposes of cost reduction, efficiency increase, energy saving, and emission reduction.
[0024] In the embodiment, as shown in the figure, Figure 1 The two sides of the solar heat collecting plate 1 are respectively provided with a refrigerant liquid inlet pipe 6 and a refrigerant gas outlet pipe 7. The two ends of the condensing coil 4 are respectively provided with a refrigerant gas inlet pipe 8 and a refrigerant liquid outlet pipe 9. The refrigerant gas outlet pipe 7 is connected with the refrigerant gas inlet pipe 8, and the refrigerant liquid outlet pipe 9 is connected with the refrigerant liquid inlet pipe 6. The liquid adding pipe 5 is arranged between the refrigerant liquid outlet pipe 9 and the refrigerant liquid inlet pipe 6. A refrigerant circulating pump 10 is arranged between the liquid adding pipe 5 and the refrigerant liquid outlet pipe 9, which ensures the continuous circulation of the R123 refrigerant in the system, helps to maintain the pressure balance and temperature control of the system, and ensures that the R123 refrigerant can effectively transfer heat between the solar heat collecting plate 1 and the condensing coil 4.
[0025] In the embodiment, as shown in the figure, Figure 1 A pressure sensor 11 is arranged between the liquid adding pipe 5 and the refrigerant liquid inlet pipe 6, which is used to monitor the pressure change of the R123 refrigerant in the system to avoid damage to the system caused by excessively high or low pressure.
[0026] In the embodiment, as shown in Figure 1 The suction pump 12 is arranged between the refrigerant outlet pipe 7 and the refrigerant inlet pipe 8 to extract the vacuum in the solar heat collecting plate 1, and only the R123 refrigerant exists in the interior, thereby ensuring the heat absorption effect.
[0027] In the embodiment, as shown in Figure 1 The heat exchange inlet pipe 13 and the heat exchange outlet pipe 14 are arranged on the upper and lower sides of the heat exchange cylinder 2 respectively, and the solution inlet pipe 15 and the solution outlet pipe 16 are arranged on the upper and lower sides of the solution storage barrel 3 respectively. The solution outlet pipe 16 is connected with the heat exchange inlet pipe 13, and the heat exchange outlet pipe 14 is connected with the solution inlet pipe 15, thereby ensuring that the lithium bromide solution can flow circularly between the solution storage barrel 3 and the heat exchange cylinder 2.
[0028] In the embodiment, as shown in Figure 1 The solution circulation pump 17 is arranged between the heat exchange outlet pipe 14 and the solution inlet pipe 15, and the first temperature sensor 18 and the second temperature sensor 19 are arranged on the heat exchange cylinder 2 and the solution storage barrel 3 respectively. After the lithium bromide solution in the heat exchange cylinder 2 absorbs the heat from the condensing coil 4, the lithium bromide solution is slowly heated. When the first temperature sensor 18 detects that the temperature rises to the set temperature, the solution circulation pump 17 is started to deliver the heated lithium bromide solution to the solution storage barrel 3, and at the same time, the cold lithium bromide solution in the solution storage barrel 3 is circulated to the heat exchange cylinder 2, so that a high temperature difference is always maintained, the heat exchange efficiency is increased, and the temperature of all the lithium bromide solution in the solution storage barrel is increased, thereby achieving the purpose of preheating.
[0029] In the embodiment, as shown in Figure 1 The solar heat collecting plate 1 is provided with four pieces, and the four pieces of the solar heat collecting plate 1 are communicated through the heat collecting pipe 20. The third temperature sensor 21 is arranged on the heat collecting pipe 20. When the third temperature sensor 21 detects that the temperature of the R123 refrigerant rises to the set temperature, the refrigerant circulation pump 10 is started to force the hot gaseous R123 refrigerant to enter the condensing coil 4. When the third temperature sensor 21 detects that the temperature is lower than the set temperature, it indicates that the hot R123 refrigerant has been completely delivered to the condensing coil 4. At this time, the refrigerant circulation pump 10 is closed. In this way, the solar heat is absorbed and transferred to the condensing coil 4.
[0030] In summary, in the embodiment, the preheating system provided in the embodiment uses the R123 refrigerant as the heat absorption medium, can generate phase change in the heat absorption process, and can convert from the liquid phase to the gas phase, thereby being able to absorb a large amount of heat. The gaseous R123 refrigerant which has absorbed a large amount of heat enters the condensing coil 4, meets the lithium bromide solution, and also generates phase change in the heat release process, and converts from the gas phase to the liquid phase, thereby being able to release a large amount of heat, so that the lithium bromide solution can be quickly heated and preheated, the electric energy used in the heating process in the concentration process is reduced, the purpose of reducing cost and increasing efficiency is achieved.
[0031] The above merely illustrates the further embodiments of the present application, but the protection scope of the present application is not limited thereto, any skilled in the art can make equivalent substitutions or changes according to the technical scheme and concept of the present application within the disclosed scope, which all belong to the protection scope of the present application.
Claims
1. A lithium bromide solution concentrated solar pre-heating system characterized by: Including solar heat collecting plate (1), heat exchange cylinder (2) and liquid storage bucket (3), the heat exchange cylinder (2) is provided with condensing coil (4), the solar heat collecting plate (1) is connected with condensing coil (4) and constitutes solar heat collecting circulation loop, the heat exchange cylinder (2) and liquid storage bucket (3) are connected and constitute lithium bromide solution circulation loop, the solar heat collecting plate (1) and condensing coil (4) are provided with liquid feeding pipe (5), the liquid feeding pipe (5) is filled with R123 refrigerant.
2. A lithium bromide solution concentrated solar preheating system according to claim 1, characterized in that: The both sides of the solar heat collecting plate (1) are respectively provided with refrigerant inlet pipe (6) and refrigerant outlet pipe (7), the both ends of the condensing coil (4) are respectively provided with refrigerant inlet pipe (8) and refrigerant outlet pipe (9), the refrigerant outlet pipe (7) is connected with the refrigerant inlet pipe (8), and the refrigerant outlet pipe (9) is connected with the refrigerant inlet pipe (6).
3. A lithium bromide solution concentrated solar preheating system according to claim 2, characterized in that: The liquid feeding pipe (5) is arranged between the refrigerant outlet pipe (9) and the refrigerant inlet pipe (6), and a refrigerant circulating pump (10) is arranged between the liquid feeding pipe (5) and the refrigerant outlet pipe (9).
4. A lithium bromide solution concentrated solar preheating system according to claim 3, characterized in that: The liquid feeding pipe (5) and the refrigerant inlet pipe (6) are provided with a pressure sensor (11).
5. A lithium bromide solution concentrated solar preheating system according to claim 2, characterized in that: The refrigerant outlet pipe (7) and the refrigerant inlet pipe (8) are provided with a suction pump (12).
6. A lithium bromide solution concentrated solar preheating system according to claim 1, characterized in that: The upper and lower sides of the heat exchange cylinder (2) are respectively provided with heat exchange inlet pipe (13) and heat exchange outlet pipe (14), and the upper and lower sides of the liquid storage bucket (3) are respectively provided with solution inlet pipe (15) and solution outlet pipe (16), the solution outlet pipe (16) is connected with the heat exchange inlet pipe (13), and the heat exchange outlet pipe (14) is connected with the solution inlet pipe (15).
7. A lithium bromide solution concentrated solar pre-heating system according to claim 6, characterized in that: The heat exchange outlet pipe (14) and the solution inlet pipe (15) are provided with a solution circulating pump (17).
8. A lithium bromide solution concentrated solar preheating system according to claim 1, characterized in that: The heat exchange cylinder (2) and the liquid storage bucket (3) are respectively provided with first temperature sensor (18) and second temperature sensor (19).
9. A lithium bromide solution concentrated solar preheating system according to claim 1, characterized in that: The solar heat collecting plate (1) is provided with four pieces, and the four pieces of solar heat collecting plate (1) are communicated through heat collecting pipe (20), and the heat collecting pipe (20) is provided with third temperature sensor (21).