Device for heating ultrapure water by utilizing heat recovery of air compressor
By designing a device that uses air compressor heat recovery and heating ultrapure water, the problems of insufficient heat energy utilization and complex control system in the prior art are solved, the full utilization of heat energy and the simplification of the control system are achieved, the investment cost is reduced and the effective working time of the equipment is increased.
Patent Information
- Application Number
- CN202421525843.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-28
- Publication Date
- 2025-05-30
- Estimated Expiration
- 2034-06-28
AI Technical Summary
In the prior art, thermal energy utilization is insufficient and control systems are complex, resulting in waste of resources and increased investment costs.
A device for heating ultrapure water using an air compressor heat recovery is designed, including an air compressor, a primary heat exchanger, a secondary heat exchanger, an ultrapure water pump, an ultrapure water tank, an internal circulation cooling system and an external circulation cooling system. The heat is absorbed and the ultrapure water is preheated through a two-stage plate heat exchanger.
It realizes full utilization of thermal energy, simplifies the control system, reduces investment costs, and increases the effective working time of the equipment.
Smart Images
Figure CN222926047U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to an ultra-pure water heating device, in particular to a device for heating ultra-pure water by using the heat recovery of an air compressor. Background Technique
[0002] In large-scale factory projects, the heat recovery system of the overhead air compressor is considered during the implementation process. Because 15% of the electric energy consumed by the air compressor is converted into the potential energy of compressed air, and 85% is released to the outside in the form of heat energy, the overall conversion efficiency is relatively low. Through the secondary utilization of waste heat by the heat energy recovery system, 80% of the waste heat can be utilized. The recovered heat energy can be used for the bathing of employees, the heating of central air conditioners, and the heating of raw water in the pure water station, achieving secondary utilization and being beneficial to energy conservation and emission reduction, which has also formed a consensus in the industry. There are mainly two problems at the present stage:
[0003] 1. The heat energy utilization is not sufficient. For example, the bathing of employees is not continuous, the heating of the central air conditioner is not needed after the heating season, and the heating of the raw water in the pure water station is not needed after the winter. Second, the discharged concentrated water is also heated, which is an ineffective heating.
[0004] 2. The control system is complex. Because it is necessary to consider both the maximum utilization of heat energy and the stability of the air compressor, and consider the mutual standby and switching of various cooling methods, the control system needs to be made more complex, and at the same time, the investment cost will also increase. Content of the Utility Model
[0005] The technical problem to be solved by the utility model is: in order to overcome the deficiencies existing in the prior art, a device for heating ultra-pure water by using the heat recovery of an air compressor is provided.
[0006] The technical solution adopted by the utility model to solve its technical problems is: a device for heating ultra-pure water by using the heat recovery of an air compressor, including an air compressor, a primary heat exchanger, a secondary heat exchanger, an ultra-pure water pump, an ultra-pure water tank, an internal circulation cooling system and an external circulation cooling system.
[0007] The internal circulation cooling system includes a cooling buffer water tank and a first cooling water pump. The outlet of the cooling buffer water tank is connected to the inlet of the first cooling water pump. The external circulation cooling system includes a cooling water tower and a second cooling water pump. The outlet of the cooling water tower is connected to the inlet of the second cooling water pump.
[0008] The outlets of the first cooling water pump and the second cooling water pump are both connected to the inlet on the heat exchange side of the primary heat exchanger. The outlet on the heat exchange side of the primary heat exchanger is connected to the inlet on the side to be heat exchanged of the secondary heat exchanger. The outlet on the side to be heat exchanged of the secondary heat exchanger is connected to the inlet of the cooling buffer water tank and the inlet of the cooling water tower.
[0009] The heat-exchanged side of the primary heat exchanger is connected to the air compressor. The inlet of the heat-exchanged side of the secondary heat exchanger is connected to the outlet of the ultra-pure water pump. The inlet of the ultra-pure water pump is connected to the outlet of the ultra-pure water tank. The outlet of the heat-exchanged side of the secondary heat exchanger is connected to the user end.
[0010] Furthermore, the internal circulation cooling system further includes a first valve and a third valve. The first valve is arranged on the connecting pipe between the outlet of the first cooling water pump and the inlet of the heat-exchanged side of the primary heat exchanger. The third valve is arranged on the connecting pipe between the outlet of the heat-exchanged side of the secondary heat exchanger and the inlet of the cooling buffer tank.
[0011] Furthermore, the first valve and the third valve are electric control valves and are electrically connected to the PLC controller.
[0012] Furthermore, the external circulation cooling system further includes a second valve and a fourth valve. The second valve is arranged on the connecting pipe between the outlet of the second cooling water pump and the inlet of the heat-exchanged side of the primary heat exchanger. The fourth valve is arranged on the connecting pipe between the outlet of the heat-exchanged side of the secondary heat exchanger and the inlet of the cooling water tower.
[0013] Furthermore, the second valve and the fourth valve are electric control valves and are electrically connected to the PLC controller.
[0014] Furthermore, the internal circulation cooling system further includes a temperature sensor, and the temperature sensor is electrically connected to the PLC controller.
[0015] Furthermore, the temperature sensor is arranged on the connecting pipe between the outlet of the first cooling water pump and the inlet of the heat-exchanged side of the primary heat exchanger.
[0016] Furthermore, the quantity ratio of the air compressor, the primary heat exchanger, and the secondary heat exchanger is 1:1:1.
[0017] Furthermore, the ultra-pure water pump is electrically connected to the PLC controller.
[0018] The beneficial effects of the present utility model are as follows: A device for heating ultra-pure water by using the heat recovery of an air compressor according to the present utility model changes the utilization mode of the recovered heat energy, uses the heat energy for preheating the ultra-pure water required by the solar cell production line, and absorbs the heat into the ultra-pure water through two-stage plate heat exchangers. Only when both two-stage plate heat exchangers leak will the pollutants in the air compressor be brought into the ultra-pure water, and this situation is almost impossible to occur;
[0019] The starting temperature of the ultrapure water required by the workshop machines is 60°C. According to calculations, the required heat far exceeds the heat that can be provided by heat recovery. Therefore, the thermal energy can be fully utilized, and there is no problem of the recovered heat having nowhere to go. Since the heat required by the pure water far exceeds the heat that can be provided by heat recovery, the control method of heat recovery is relatively simple, reducing the investment cost. The control of the water temperature in the workshop used to rely entirely on electric heating to raise the water temperature. Now, through the heat recovery system, the pure water is preheated. Although it cannot reach the required 60°C, it raises the basic water temperature of the pure water, and a large amount of electric energy can be saved in the workshop electric heating. At the same time, the standby time of the machines waiting for the water temperature to rise is saved, and the effective working time of the equipment is increased.
[0020] In summary, the utility model has the characteristics of reasonable design, simple structure, full utilization of thermal energy and easy control. Brief Description of the Drawings
[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings described below are only some embodiments recorded in this application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.
[0022] Figure 1 It is a process schematic diagram of the present utility model. Detailed Embodiments
[0023] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the protection scope of the present utility model.
[0024] Figure 1 A device for heating ultrapure water using the heat recovery of an air compressor as shown includes an air compressor, a primary heat exchanger, a secondary heat exchanger, an ultrapure water pump, an ultrapure water tank, an internal circulation cooling system, and an external circulation cooling system. The air compressor is connected to the heat-exchanged side of the primary heat exchanger. The inlet of the heat-exchanged side of the primary heat exchanger is respectively connected to the outlets of the first cooling water pump and the second cooling water pump. The outlet of the heat-exchanged side of the primary heat exchanger is connected to the inlet of the heat-exchanged side of the secondary heat exchanger. The outlet of the heat-exchanged side of the secondary heat exchanger is connected to the inlet of the cooling buffer tank and the inlet of the cooling water tower. The inlet of the heat-exchanged side of the secondary heat exchanger is connected to the outlet of the ultrapure water pump. The inlet of the ultrapure water pump is connected to the outlet of the ultrapure water tank. The outlet of the heat-exchanged side of the secondary heat exchanger is connected to the user end.
[0025] The internal circulation cooling system includes a cooling buffer water tank, a first cooling water pump, a first valve and a third valve. The outlet of the cooling buffer water tank is connected to the inlet of the first cooling water pump. The outlet of the first cooling water pump is connected to the inlet of the first valve. The outlet of the first valve is connected to the inlet of one side of the primary heat exchanger for heat exchange. The outlet of one side of the primary heat exchanger for heat exchange is connected to the inlet of one side of the secondary heat exchanger to be heat-exchanged. The outlet of one side of the secondary heat exchanger to be heat-exchanged is connected to the inlet of the third valve. The outlet of the third valve is connected to the inlet of the cooling buffer water tank;
[0026] The external circulation cooling system includes a cooling water tower, a second cooling water pump, a second valve and a fourth valve. The outlet of the cooling water tower is connected to the inlet of the second cooling water pump. The outlet of the second cooling water pump is connected to the inlet of the second valve. The outlet of the second valve is connected to the inlet of one side of the primary heat exchanger for heat exchange. The outlet of one side of the primary heat exchanger for heat exchange is connected to the inlet of one side of the secondary heat exchanger to be heat-exchanged. The outlet of one side of the secondary heat exchanger to be heat-exchanged is connected to the inlet of the fourth valve. The outlet of the fourth valve is connected to the inlet of the cooling water tower; There is a part of the common pipeline between the internal circulation cooling system and the external circulation cooling system.
[0027] The quantity ratio of the air compressor, the primary heat exchanger and the secondary heat exchanger is 1:1:1. For example, if there are five air compressors, the corresponding number of primary heat exchangers is five, and the number of secondary heat exchangers is also five. The numbers of the first valve, the second valve, the third valve and the fourth valve remain unchanged, and the numbers of the first cooling water pump and the second cooling water pump also remain unchanged.
[0028] A temperature sensor is arranged in the pipeline where the outlet of the first valve is connected to the inlet of one side of the primary heat exchanger for heat exchange. The first valve, the second valve, the third valve, the fourth valve, the first cooling water pump, the second cooling water pump and the ultra-pure water pump are all connected to the PLC controller,
[0029] When the temperature detected by the temperature sensor is lower than the preset value, it indicates that the heat is insufficient. The PLC controller opens the first valve, the third valve, the first cooling water pump and the ultra-pure water pump, and closes the second valve, the fourth valve and the second cooling water pump to enable the internal circulation cooling system;
[0030] When the temperature detected by the temperature sensor is higher than the preset value, it indicates that the heat is excessive. The PLC controller opens the second valve, the fourth valve, the second cooling water pump, the cooling water tower and the ultra-pure water pump, and closes the first valve, the third valve and the first cooling water pump to enable the external circulation cooling system.
[0031] The above are only the preferred specific embodiments of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution and the inventive concept of the present utility model, makes equivalent substitutions or changes, and all should be covered within the protection scope of the present utility model.
Claims
1. A device for heating ultrapure water by utilizing heat recovery from an air compressor, characterized in that: Including air compressor, primary heat exchanger, secondary heat exchanger, ultrapure water pump, ultrapure water tank, internal circulation cooling system and external circulation cooling system, The internal circulation cooling system includes a cooling buffer water tank and a first cooling water pump, the outlet of the cooling buffer water tank is connected to the inlet of the first cooling water pump, and the external circulation cooling system includes a cooling water tower and a second cooling water pump, the outlet of the cooling water tower is connected to the inlet of the second cooling water pump, The outlet of the first cooling water pump and the outlet of the second cooling water pump are both connected to the inlet of the heat exchange side of the primary heat exchanger, the outlet of the heat exchange side of the primary heat exchanger is connected to the inlet of the heat exchanged side of the secondary heat exchanger, and the outlet of the heat exchanged side of the secondary heat exchanger is connected to the inlet of the cooling buffer water tank and the inlet of the cooling water tower; The heat exchanged side of the primary heat exchanger is connected to the air compressor, the inlet of the heat exchange side of the secondary heat exchanger is connected to the outlet of the ultrapure water pump, the inlet of the ultrapure water pump is connected to the outlet of the ultrapure water tank, and the outlet of the heat exchange side of the secondary heat exchanger is connected to the user end.
2. The device for heating ultrapure water by utilizing heat recovery from an air compressor according to claim 1, characterized in that: The internal circulation cooling system also includes a first valve and a third valve. The first valve is arranged on a connecting pipe between the outlet of the first cooling water pump and the inlet of the heat exchange side of the first heat exchanger, and the third valve is arranged on a connecting pipe between the outlet of the heat exchange side of the second heat exchanger and the inlet of the cooling buffer water tank.
3. The device for heating ultrapure water by utilizing heat recovery from an air compressor according to claim 2, characterized in that: The first valve and the third valve are electrically controlled valves electrically connected to a PLC controller.
4. The device for heating ultrapure water by utilizing heat recovery from an air compressor according to claim 1, characterized in that: The external circulation cooling system also includes a second valve and a fourth valve. The second valve is arranged on a connecting pipe between the outlet of the second cooling water pump and the inlet of the heat exchange side of the first heat exchanger, and the fourth valve is arranged on a connecting pipe between the outlet of the heat exchange side of the second heat exchanger and the inlet of the cooling water tower.
5. The device for heating ultrapure water by utilizing heat recovery from an air compressor according to claim 4, characterized in that: The second valve and the fourth valve are electrically controlled valves electrically connected to the PLC controller.
6. The device for heating ultrapure water by utilizing heat recovery from an air compressor according to claim 1, characterized in that: The internal circulation cooling system also includes a temperature sensor, which is electrically connected to the PLC controller.
7. The device for heating ultrapure water by utilizing heat recovery from an air compressor according to claim 6, characterized in that: The temperature sensor is arranged on a connecting pipe between the outlet of the first cooling water pump and the inlet of the heat exchange side of the primary heat exchanger.
8. The device for heating ultrapure water by utilizing heat recovery from an air compressor according to claim 1, characterized in that: The quantity ratio of the air compressor, the primary heat exchanger and the secondary heat exchanger is 1:1:
1.
9. The device for heating ultrapure water by utilizing heat recovery from an air compressor according to claim 1, characterized in that: The ultrapure water pump is electrically connected to the PLC controller.