Lithium bromide cold water circulation system
By designing a lithium bromide cold water circulation system and utilizing components such as a self-regulating pressure valve for demineralized water replenishment and a cold water discharge valve, the problems of unstable cold water pressure and flow were solved, thus achieving stable operation and energy saving of the lithium bromide unit.
Patent Information
- Application Number
- CN202520028219.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-07
- Publication Date
- 2025-12-12
- Estimated Expiration
- 2035-01-07
AI Technical Summary
In existing lithium bromide chilled water systems, unstable chilled water pressure can easily lead to crystallization or high power consumption in the unit, and unstable chilled water flow may cause leakage risks, affecting the stable operation of the equipment.
A lithium bromide cold water circulation system was designed, including a cold water pump, a demineralized water makeup pipe, and inlet and outlet pipes for the cold water pump. The system achieves stable control of the cold water pressure through components such as a self-regulating pressure valve for the demineralized water makeup and a cold water discharge valve. The load is adjusted by a thermometer and a heat source inlet regulating valve to ensure that the cold water temperature is within a suitable range.
Stable control of cold water pressure and temperature was achieved, leakage at the sealing surface was avoided, and the stable operation of the lithium bromide unit was ensured, resulting in energy saving and consumption reduction.
Smart Images
Figure CN223663538U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to water circulation equipment, specifically a lithium bromide cold water circulation system. Background Technology
[0002] In chemical production, there are numerous heat exchange and refrigeration requirements. Around 10°C, most refrigeration uses lithium bromide refrigeration units. To ensure stable operation of these units, a stable chilled water circulation system is necessary. Low chilled water pressure and flow rate can cause crystallization in the unit, while high pressure leads to high power consumption and increased leakage risk. Therefore, both excessively high and low chilled water pressure can affect the stable operation of the unit. Simultaneously, changes in external cooling load cause fluctuations in chilled water temperature, affecting the stability of the lithium bromide unit and the cooling facilities.
[0003] Therefore, ensuring stable lithium bromide cooling water pressure and meeting water quality standards, and avoiding low or excessive pressure due to cooling water flow or pipeline leakage, which could lead to leakage at the sealing surface, is a pressing technical problem that needs to be solved. Summary of the Invention
[0004] The technical objective of this invention is to provide a lithium bromide cold water circulation system to address how to ensure stable lithium bromide cold water pressure and meet water quality standards, and to avoid problems such as low or excessive pressure due to cold water flow or pipeline leakage, which could lead to leakage at the sealing surface.
[0005] The technical task of this utility model is achieved in the following manner: a lithium bromide cold water circulation system includes a cold water pump inlet pipe, a cold water pump, and a cold water pump outlet pipe. One end of the cold water pump inlet pipe is connected to the cold water pump inlet end, and the cold water pump outlet end is connected to one end of the cold water pump outlet pipe. A lithium bromide chiller unit is installed at the other end of the cold water pump outlet pipe. A lithium bromide cold water outlet pipe is installed at the outlet end of the lithium bromide chiller unit. One end of the lithium bromide cold water outlet pipe is connected to the lithium bromide chiller unit, and a lithium bromide cooler is installed at the other end of the lithium bromide cold water outlet pipe. The lithium bromide cooler is connected to the other end of the cold water pump inlet pipe.
[0006] A demineralized water supply pipe is installed at one end of the cold water pump inlet pipe near the cold water pump, and a demineralized water supply self-standing pressure stabilizing valve is installed on the demineralized water supply pipe.
[0007] A displacement drain pipe is installed at the end of the cold water pump inlet pipe near the lithium bromide cooler, and a cold water discharge valve is installed on the displacement drain pipe.
[0008] Preferably, the demineralized water supply pipeline is equipped with a demineralized water supply main pressure gauge.
[0009] More preferably, a cold water pump inlet valve is provided on the cold water pump inlet pipe, and the cold water pump inlet valve is located between the connection point of the demineralized water makeup pipe and the cold water pump inlet pipe and the connection point of the replacement drainage pipe and the cold water pump inlet pipe.
[0010] More preferably, a chilled water pump outlet valve is provided at the end of the chilled water pump outlet pipe near the chilled water pump, and a chilled water pump outlet pressure gauge and a lithium bromide chiller inlet flow meter are sequentially provided at the end of the chilled water pump outlet pipe near the lithium bromide chiller unit.
[0011] More preferably, the lithium bromide refrigeration unit is equipped with a heat source inlet pipe.
[0012] More preferably, a heat source inlet regulating valve is provided on the heat source inlet pipe.
[0013] More preferably, a temperature gauge is installed at the end of the lithium bromide chilled water outlet pipe near the lithium bromide refrigeration unit.
[0014] More preferably, a cold water pressure gauge is installed at the end of the lithium bromide cold water outlet pipe near the lithium bromide cooler.
[0015] The lithium bromide cold water circulation system of this invention has the following advantages:
[0016] (I) This utility model overcomes the problem of low or excessive pressure caused by low cold water flow or pipeline leakage, which in turn leads to leakage of the sealing surface. It ensures stable pressure and water quality of the lithium bromide cooling water system. At the same time, it can adjust the load of the lithium bromide unit in a timely manner when the external cooling load changes and fluctuates, so as to achieve energy saving and consumption reduction while ensuring the stable operation of the lithium bromide device.
[0017] (II) The circulating chilled water of this utility model absorbs cold energy and is cooled down by the lithium bromide unit. After heat exchange by the lithium bromide cooler, the temperature rises. After being pressurized by the chilled water pump, it is sent to the lithium bromide unit for the next chilled water cycle. During normal production, the inlet and outlet pressures of the chilled water pump are kept stable by balancing the water replenishment and drainage pressures, so as to ensure the stable operation of the lithium bromide unit.
[0018] (III) This utility model ensures the stability of the inlet pressure of the cold water pump through a self-standing pressure stabilizing valve for demineralized water replenishment;
[0019] (iv) This utility model uses a cold water drain valve to drain water and reduce pressure when the pressure in the cold water pipeline is too high, thereby reducing the risk of leakage at the sealing surface and stabilizing the operation of the device.
[0020] (v) This utility model adjusts the lithium bromide load in a timely manner according to the temperature change of the thermometer to ensure the cold water temperature index and achieve the purpose of energy saving, consumption reduction and stability.
[0021] Therefore, this utility model has the characteristics of reasonable design, simple structure, easy processing, small size, convenient use, and multiple uses, and thus has great value for promotion and use. Attached Figure Description
[0022] The present invention will be further described below with reference to the accompanying drawings.
[0023] Appendix Figure 1 This is a schematic diagram of a lithium bromide cold water circulation system.
[0024] In the diagram: 1. Cold water pump inlet pipe; 2. Demineralized water makeup main pipe pressure gauge; 3. Demineralized water makeup self-standing pressure regulating valve; 4. Cold water pump inlet pressure gauge; 5. Cold water pump; 6. Cold water pump outlet valve; 7. Cold water pump outlet pipe; 8. Cold water pump outlet pressure gauge; 9. Lithium bromide chiller unit; 10. Lithium bromide cold water outlet pipe; 11. Cold water pressure gauge; 12. Lithium bromide cooler; 13. Cold water pump inlet pipe valve; 14. Cold water discharge valve; 15. Lithium bromide chiller unit inlet flow meter; 16. Heat source inlet regulating valve; 17. Thermometer; 18. Demineralized water makeup pipe; 19. Heat source inlet pipe; 20. Displacement drainage pipe. Detailed Implementation
[0025] The following detailed description of a lithium bromide cold water circulation system of the present invention is based on the accompanying drawings and specific embodiments.
[0026] In the description of this utility model, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0027] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0028] Example:
[0029] As attached Figure 1 As shown, this embodiment provides a lithium bromide chilled water circulation system, the structure of which includes a chilled water pump inlet pipe 1, a chilled water pump 5, and a chilled water pump outlet pipe 7. One end of the chilled water pump inlet pipe 1 is connected to the inlet end of the chilled water pump 5, and the outlet end of the chilled water pump 5 is connected to one end of the chilled water pump outlet pipe 7. A lithium bromide chiller unit 9 is installed at the other end of the chilled water pump outlet pipe 7. A lithium bromide chilled water outlet pipe 10 is installed at the outlet end of the lithium bromide chiller unit 9. One end of the lithium bromide chilled water outlet pipe 10 is connected to the lithium bromide chiller unit 9. Unit 9 is connected to the cold water pump. A lithium bromide cooler 12 is installed at the other end of the lithium bromide cold water outlet pipe 10. The lithium bromide cooler 12 is connected to the other end of the cold water pump inlet pipe 1. A demineralized water makeup pipe 18 is installed at the end of the cold water pump inlet pipe 1 near the cold water pump 5. A demineralized water makeup pipe 3 is installed on the demineralized water makeup pipe 18. A displacement drain pipe 20 is installed at the end of the cold water pump inlet pipe 1 near the lithium bromide cooler 12. A cold water discharge valve 14 is installed on the displacement drain pipe 20.
[0030] In this embodiment, a demineralized water supply pipe 18 is equipped with a demineralized water supply main pipe pressure gauge 2.
[0031] In this embodiment, a cold water pump inlet pipe valve 13 is installed on the cold water pump inlet pipe 1. The cold water pump inlet pipe valve 13 is located between the connection between the demineralized water replenishment pipe 18 and the cold water pump inlet pipe 1 and the connection between the replacement drainage pipe 20 and the cold water pump inlet pipe 1.
[0032] In this embodiment, a chilled water pump outlet valve 6 is installed at the end of the chilled water pump outlet pipe 7 near the chilled water pump 5, and a chilled water pump outlet pressure gauge 8 and a lithium bromide chiller inlet flow meter 15 are installed sequentially at the end of the chilled water pump outlet pipe 7 near the lithium bromide chiller unit 9.
[0033] In this embodiment, the lithium bromide refrigeration unit 9 is equipped with a heat source inlet pipe 19, and a heat source inlet regulating valve 16 is installed on the heat source inlet pipe 19.
[0034] In this embodiment, a thermometer 17 is installed at one end of the lithium bromide chilled water outlet pipe 10 near the lithium bromide refrigeration unit 9.
[0035] In this embodiment, a cold water pressure gauge 11 is installed at one end of the lithium bromide cold water outlet pipe 10 near the lithium bromide cooler 12.
[0036] In this embodiment, demineralized water is supplied to the cold water pump inlet pipe 1 through the demineralized water supply pipe 18 and the demineralized water supply self-regulating pressure valve 3. After being pressurized by the cold water pump 5, the cold water flows into the cold water inlet of the lithium bromide refrigeration unit 9 through the cold water pump outlet valve 6 and the cold water pump outlet pipe 7. The cold water absorbs the cooling capacity of the lithium bromide refrigeration unit 9 to lower its temperature, and then flows into the cold water inlet pipe of the lithium bromide cooler 12 through the lithium bromide refrigeration unit outlet pipe 10. After the cold water is heated by heat exchange through the heat exchanger wall, its temperature is increased, and then it flows into the cold water pump inlet pipe 1 through the cold water pump inlet pipe valve 13, where the cold water begins the next round of refrigeration cycle.
[0037] During operation, if the temperature gauge 17 exceeds the set target, the load of the lithium bromide input heat source is adjusted via the heat source inlet regulating valve 16 to ensure that the chilled water temperature of the lithium bromide chiller unit 9 is within 10±2℃. This prevents improper heat input from causing the lithium bromide chiller unit 9 to overload and consume excessive heat, or to underload and fail to meet the production cooling capacity requirements.
[0038] During normal production operation, leaks or seepage in the chilled water system pipelines or equipment, or unqualified water discharge, cause low chilled water pressure and low flow rate in the lithium bromide chiller unit 9. Demineralized water is replenished by the demineralized water replenishment self-regulating pressure valve 3 to stabilize the pressure of the chilled water pump inlet pipeline 1 and achieve the target of stabilizing the chilled water system pressure of the lithium bromide chiller unit 9.
[0039] The pressure before replenishing the demineralized water is monitored by pressure gauge 2 on the demineralized water replenishment main pipe. Under normal operation, pressure gauge 2 on the demineralized water replenishment main pipe is usually higher than pressure gauge 4 at the inlet of the cold water pump, maintaining a certain pressure difference of 0.4MPa-0.5MPa. Pressure gauge 4 at the inlet of the cold water pump is stable between 0.2-0.25MPa.
[0040] Before starting the chilled water pump 5, the inlet valve 13 of the chilled water pump must be fully opened and the outlet valve 6 of the chilled water pump must be fully closed. After the chilled water pump 5 starts and operates normally, the outlet valve 6 of the chilled water pump is opened. The pressure gauge 8 of the outlet pipe of the chilled water pump and the inlet flow meter 15 of the lithium bromide chiller unit are monitored to establish a stable chilled water system circulation for the lithium bromide chiller unit 9.
[0041] When the temperature gauge 17 shows a temperature higher than 12℃, adjust the opening of the heat source inlet regulating valve 16 to increase the heat input of the lithium bromide chiller unit 9. After increasing the cooling load of the lithium bromide chiller unit 9, the chilled water temperature will gradually decrease to the control target.
[0042] When the temperature gauge 17 shows below 8℃, adjust the opening of the heat source inlet regulating valve 16 to reduce the heat input of the lithium bromide chiller unit 9. After reducing the cooling load of the lithium bromide chiller unit 9, the chilled water temperature is gradually adjusted to the control target.
[0043] When the water quality cannot meet the production requirements or the system needs to be emptied for maintenance during long-term operation, the outlet cold water after heat exchange by the lithium bromide cooler 13 is replaced and discharged through the cold water discharge valve 14.
[0044] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.
Claims
1. A lithium bromide cold water circulation system, characterized in that, It includes a chilled water pump inlet pipe, a chilled water pump, and a chilled water pump outlet pipe. One end of the chilled water pump inlet pipe is connected to the chilled water pump inlet end, and the chilled water pump outlet end is connected to one end of the chilled water pump outlet pipe. A lithium bromide chiller unit is installed at the other end of the chilled water pump outlet pipe. A lithium bromide chilled water outlet pipe is installed at the outlet end of the lithium bromide chiller unit. One end of the lithium bromide chilled water outlet pipe is connected to the lithium bromide chiller unit, and a lithium bromide cooler is installed at the other end of the lithium bromide chilled water outlet pipe. The lithium bromide cooler is connected to the other end of the chilled water pump inlet pipe. A demineralized water supply pipe is installed at one end of the cold water pump inlet pipe near the cold water pump, and a demineralized water supply self-standing pressure stabilizing valve is installed on the demineralized water supply pipe. A displacement drain pipe is installed at the end of the cold water pump inlet pipe near the lithium bromide cooler, and a cold water discharge valve is installed on the displacement drain pipe.
2. The lithium bromide cold water circulation system according to claim 1, characterized in that, The desalination water supply pipeline is equipped with a desalination water supply main pressure gauge.
3. The lithium bromide cold water circulation system according to claim 1 or 2, characterized in that, A cold water pump inlet valve is installed on the cold water pump inlet pipe. The cold water pump inlet valve is located between the connection point of the demineralized water makeup pipe and the cold water pump inlet pipe and the connection point of the replacement drainage pipe and the cold water pump inlet pipe.
4. The lithium bromide cold water circulation system according to claim 3, characterized in that, A chilled water pump outlet valve is installed at the end of the chilled water pump outlet pipe near the chilled water pump, and a chilled water pump outlet pressure gauge and a lithium bromide chiller inlet flow meter are installed sequentially at the end of the chilled water pump outlet pipe near the lithium bromide chiller unit.
5. The lithium bromide cold water circulation system according to claim 4, characterized in that, The lithium bromide refrigeration unit is equipped with a heat source inlet pipe.
6. The lithium bromide cold water circulation system according to claim 5, characterized in that, A heat source inlet regulating valve is installed on the heat source inlet pipe.
7. The lithium bromide cold water circulation system according to claim 6, characterized in that, A thermometer is installed at one end of the lithium bromide chilled water outlet pipe near the lithium bromide refrigeration unit.
8. The lithium bromide cold water circulation system according to claim 7, characterized in that, A cold water pressure gauge is installed at one end of the lithium bromide cold water outlet pipe near the lithium bromide cooler.