Constant-temperature linkage water supply system for zone melting furnace

Abstract

The utility model discloses a constant-temperature linkage water supply system for a zone melting furnace. The constant-temperature linkage water supply system comprises the zone melting furnace, a closed water cooling tower and a multi-connected air cooling heat pump module, a water inlet of the closed water-cooling tower is connected with a water-cooling tower water inlet valve, and a water outlet of the closed water-cooling tower is connected with a water-cooling tower water outlet valve; the multi-connected air-cooled heat pump module comprises at least one air-cooled heat pump, a water inlet of the air-cooled heat pump is connected with an air-cooled heat pump water inlet valve, and a water outlet of the air-cooled heat pump is connected with an air-cooled heat pump water outlet valve; the water outlet of the zone melting furnace is connected with the water inlet end of the water cooling tower water inlet valve through a pipeline; the water inlet end of the air cooling heat pump water inlet valve is connected with the water outlet end of the water cooling tower water inlet valve; the water outlet end of the air-cooled heat pump water outlet valve is connected to the water inlet of the zone melting furnace; a first bypass valve is arranged between the water inlet end of the water cooling tower water inlet valve and the water outlet end of the water cooling tower water outlet valve; a second bypass valve is arranged between the water inlet end of the air-cooled heat pump water inlet valve and the water outlet end of the air-cooled heat pump water outlet valve.

Description

Technical Field

[0001] The utility model relates to the field of constant temperature water supply systems, in particular to a constant temperature linkage water supply system for a zone melting furnace. Background Art

[0002] In granular silicon projects, the granular silicon furnace, phosphorus detection furnace, and zone melting polymerizer are key production equipment, collectively referred to as the zone melting furnace. They play a vital role in the granular silicon production process. The granular silicon furnace is used to produce granular silicon using the silane fluidized bed method, the phosphorus detection furnace is used to detect the phosphorus content in the silicon material, and the zone melting polymerizer is used for further processing and purification of the silicon material.

[0003] These critical production equipment are used frequently and require large quantities of cooling water to ensure their normal operation. Therefore, the granular silicon project has a high demand for a continuous supply of 20°C circulating cooling water year-round.

[0004] Existing technologies typically use simple air-cooled heat pump units, water-cooled units, or closed cooling towers as cooling equipment. Under current process and climatic conditions, these methods suffer from high energy consumption and the inability to stably control cooling water temperature. Furthermore, a single cooling method cannot meet the year-round cooling requirements of regions like Inner Mongolia, where temperatures range from -25°C to 40°C year-round.

[0005] In addition, simply using air-cooled heat pump units or water-cooled units is generally arranged outdoors on the roof. Given the distinct four seasons and cold winters in the north, it is necessary to build a matching unit factory and auxiliary heating measures, which will increase investment costs.

[0006] The information disclosed in this background technology section is only intended to increase the understanding of the overall background of the present invention and should not be regarded as an admission or any form of suggestion that the information constitutes the prior art already known to ordinary technicians in this field. Utility Model Content

[0007] Purpose of the utility model: The technical problem to be solved by the utility model is to provide a constant temperature linkage water supply system for a zone furnace in response to the shortcomings of the existing technology, which can provide stable circulating cooling water throughout the year, while having lower energy consumption and lower investment cost.

[0008] To solve the above-mentioned technical problems, the present invention discloses a constant temperature linked water supply system for a zone furnace, comprising a zone furnace, a closed water cooling tower, and a multi-connected air-cooled heat pump module. The water inlet of the closed water cooling tower is connected to a water cooling tower water inlet valve, and the water outlet is connected to a water cooling tower water outlet valve. The multi-connected air-cooled heat pump module comprises at least one air-cooled heat pump, the water inlet of the air-cooled heat pump being connected to an air-cooled heat pump water inlet valve, and the water outlets being respectively connected to air-cooled heat pump water outlet valves. The water outlet of the zone furnace is connected to the water inlet of the water cooling tower water inlet valve via a pipeline. The water inlet of the air-cooled heat pump water inlet valve is connected to the water outlet of the water cooling tower water inlet valve. The water outlet of the air-cooled heat pump water outlet valve is connected to the water inlet of the zone furnace. A first bypass valve is provided between the water inlet of the water cooling tower water inlet valve and the water outlet of the water cooling tower water outlet valve. A second bypass valve is provided between the water inlet end of the air-cooled heat pump water inlet valve and the water outlet end of the air-cooled heat pump water outlet valve.

[0009] Specifically, it includes a water pump unit, which is arranged on a pipeline connecting the water outlet of the zone furnace and the water inlet end of the water cooling tower water inlet valve.

[0010] Specifically, the water pump unit includes a plurality of water pumps connected in parallel, and a control valve is provided at the water inlet and the water outlet of each water pump.

[0011] Furthermore, it also includes a buffer water tank, which is arranged on the pipeline connecting the water outlet of the zone furnace and the water inlet end of the water cooling tower inlet valve and is located between the zone furnace and the water pump unit.

[0012] Furthermore, a first valve is respectively provided at the water inlet and the water outlet of the buffer water tank.

[0013] Specifically, a circulating cooling water supply pipe is connected to the top of the buffer water tank, and a first water supply valve for controlling the on-off of the circulating cooling water supply pipe is provided on the circulating cooling water supply pipe.

[0014] Specifically, the closed water cooling tower is connected to a water supply pipeline, and a second water supply valve is provided on the water supply pipeline.

[0015] Specifically, the closed water cooling tower is connected to a drainage pipeline, and a drainage valve is provided on the drainage pipeline.

[0016] Furthermore, the system further includes a controller, to which the closed water-cooling tower, the air-cooled heat pump, the air-cooled heat pump water inlet valve, the air-cooled heat pump water outlet valve, the water-cooling tower water inlet valve, the water-cooling tower water outlet valve, the first bypass valve, and the second bypass valve are electrically connected. The controller controls the start and stop of the closed water-cooling tower and the air-cooled heat pump, and the disconnection and connection of the air-cooled heat pump water inlet valve, the air-cooled heat pump water outlet valve, the water-cooling tower water inlet valve, the water-cooling tower water outlet valve, the first bypass valve, and the second bypass valve according to the ambient temperature.

[0017] Specifically, the system includes a temperature sensor for measuring ambient temperature, and the temperature sensor is electrically connected to the controller.

[0018] Beneficial effects:

[0019] 1. The utility model is installed in series with a multi-connected air-cooled heat pump module and a closed cooling tower, and can switch between spring and autumn mode, summer mode and winter mode according to the outdoor ambient temperature. In spring and autumn mode, the multi-connected air-cooled heat pump module cools alone; in winter mode, the closed cooling tower cools alone; in summer mode, the two are connected in series and cool simultaneously. This ensures the stable and continuous operation of the circulating cooling water system and meets the continuous and stable operation requirements of the district furnace throughout the year. In addition, the closed cooling tower is used to cool down the ambient temperature in winter, while the year-round air-cooled heat pump is deactivated. This not only reduces the use time of the air-cooled heat pump throughout the year and reduces the total energy consumption of the system, but also reduces investment costs by eliminating the need to build a factory building and heating measures to prevent the air-cooled heat pump from freezing in winter.

[0020] 2. The system of the present invention can be configured to use solenoid valves for each valve, and control the start and stop of the closed water cooling tower and the air-cooled heat pump, as well as the disconnection and conduction of the air-cooled heat pump water inlet valve, the air-cooled heat pump water outlet valve, the water cooling tower water inlet valve, the water cooling tower water outlet valve, the first bypass valve and the second bypass valve according to the ambient temperature through a controller to intelligently switch between different operating modes. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, and the above and / or other advantages of the present invention will become more apparent.

[0022] Figure 1 A structural schematic diagram of a constant temperature linkage water supply system for a zone furnace in spring and autumn modes is provided in an embodiment of the present utility model.

[0023] Figure 2 for Figure 1 The schematic diagram of the structure of the constant temperature linkage water supply system for the district furnace in summer mode is shown;

[0024] Figure 3 for Figure 1 The diagram shows the structure of the constant temperature linkage water supply system for the district furnace in winter mode.

[0025] Description of the accompanying drawings:

[0026] 1. Zone furnace; 2. Closed water-cooling tower; 21. Water-cooling tower inlet valve; 22. Water-cooling tower outlet valve; 23. Water supply pipeline; 24. Second water supply valve; 25. Drain pipeline; 26. Drain valve; 3. Air-cooled heat pump; 31. Air-cooled heat pump inlet valve; 32. Air-cooled heat pump outlet valve; 4. First bypass valve; 5. Second bypass valve; 6. Water pump unit; 61. Water pump; 62. Control valve; 7. Buffer water tank; 8. Circulating cooling water supply pipe; 9. First water supply valve; 10. First valve; 11. Second valve. DETAILED DESCRIPTION

[0027] Example 1

[0028] The utility model provides a constant temperature linkage water supply system for a zone melting furnace, which can be a granular silicon furnace, a phosphorus detection furnace, or a zone melting polymerization instrument. The constant temperature linkage water supply system of the utility model can provide cooling water at a stable temperature to the zone melting furnace at all times of the year, and has lower energy consumption and lower investment costs.

[0029] See also Figure 1 The system includes a zone furnace 1, a closed water cooling tower 2, and a multi-split air-cooled heat pump module. The water inlet of the closed water cooling tower 2 is connected to a water cooling tower water inlet valve 21, and the water outlet is connected to a water cooling tower water outlet valve 22. The multi-split air-cooled heat pump module includes at least one air-cooled heat pump 3, the water inlet of the air-cooled heat pump 3 is connected to an air-cooled heat pump water inlet valve 31, and the water outlets are respectively connected to air-cooled heat pump water outlet valves 32. The water outlet of the zone furnace 1 is connected to the water inlet end of the water cooling tower water inlet valve 21 through a pipeline. The water outlet end of the water cooling tower water inlet valve 21 is connected to the water inlet end of the air cooling heat pump water inlet valve 31. The water outlet end of the air cooling heat pump water outlet valve 32 is connected to the water inlet of the zone furnace 1. A first bypass valve 4 is provided between the water inlet end of the water cooling tower water inlet valve 21 and the water outlet end of the water cooling tower water outlet valve 22. A second bypass valve 5 is provided between the water inlet end of the air-cooled heat pump water inlet valve 31 and the water outlet end of the air-cooled heat pump water outlet valve 32 .

[0030] Specifically, one end of the first bypass valve 4 is connected to the water inlet of the water-cooling tower inlet valve 21, and the other end is connected to the water outlet of the water-cooling tower outlet valve 22. One end of the second bypass valve 5 is connected to the water inlet of the air-cooled heat pump inlet valve 31, and the other end is connected to the water outlet of the air-cooled heat pump outlet valve 32.

[0031] A closed water cooling tower is a device that cools a fluid. The fluid exchanges heat and mass with the air flowing through it, causing the temperature of the fluid to drop. Closed water cooling towers have two operating modes: air cooling and air cooling combined with spraying.

[0032] The utility model arranges an air-cooled unit and a closed cooling tower to be installed in series. According to the change of outdoor ambient temperature, by adjusting the opening and closing states of the first bypass valve 4, the second bypass valve 5, the water-cooling tower inlet valve 21, the water-cooling tower outlet valve 22, the air-cooled heat pump inlet valve 31 and the air-cooled heat pump outlet valve 32, as well as the opening and closing states of the closed water-cooling tower 2 and the multi-connected air-cooled heat pump module, the operating mode can be switched to form a plurality of different circulating cooling water loops. The air-cooled heat pump 3 can cool the circulating cooling water alone, and the closed water-cooling tower 2 can cool the circulating cooling water alone. The two can also be connected in series to cool the circulating cooling water at the same time, thereby achieving the continuous and stable operation requirements of the zone furnace throughout the year while reducing energy consumption.

[0033] It should be understood that the quality standard of the circulating cooling water should avoid causing corrosion and blockage of the pipes in the zone furnace equipment and avoid introducing metal impurities. The circulating cooling water is preferably desalted water.

[0034] For details, see Figure 1 The constant temperature linkage water supply system for the zone furnace includes a water pump unit 6, which is arranged on a pipeline connecting the water outlet of the zone furnace 1 and the water inlet end of the water cooling tower inlet valve 21.

[0035] For details, see Figure 1 The water pump unit 6 includes a plurality of water pumps 61 connected in parallel, and a control valve 62 is provided at the water inlet and the water outlet of each water pump 61 .

[0036] In this embodiment, a plurality of water pumps 61 connected in parallel are provided so that at least one water pump 61 can be in an inactive state for standby use.

[0037] In some embodiments, see Figure 1 The constant temperature linkage water supply system for the zone furnace also includes a buffer water tank 7, which is arranged on the pipeline connecting the water outlet of the zone furnace 1 and the water inlet end of the water cooling tower inlet valve 21 and is located between the zone furnace 1 and the water pump unit 6.

[0038] The top of the buffer water tank 7 is connected to a circulating cooling water supply pipe 8, which is equipped with a first water supply valve 9 for controlling the on / off flow of the circulating cooling water supply pipe 8. When the liquid level in the buffer water tank 7 falls below a set value, the first water supply valve 9 is opened to replenish the buffer water tank 7 with circulating cooling water.

[0039] In some embodiments, see Figure 1 The closed water cooling tower 2 is connected to a water supply pipe 23, which is provided with a second water supply valve 24. When the closed water cooling tower 2 is short of cooling water, the second water supply valve 24 can be opened to supply cooling water to the closed water cooling tower 2. This cooling water is the cold source used to cool the circulating cooling water in the closed cooling tower.

[0040] In some embodiments, see Figure 1 The closed water cooling tower 2 is connected to a drainage pipe 25, and a drainage valve 26 is provided on the drainage pipe 25. When the closed water cooling tower 2 can meet the requirements by only using fan cooling, the cooling water in the closed water cooling tower 2 can be discharged through the drainage valve 26.

[0041] In some embodiments, see Figure 1 The water inlet and outlet of the buffer water tank 7 are respectively provided with a first valve 10 that can be opened and closed. When the buffer water tank 7 needs to be repaired or modified, the system can be isolated by closing the first valve 10, which is convenient for repairing the buffer water tank 7.

[0042] In some embodiments, see Figure 1 A second valve 11 is installed at the water inlet of the zone furnace 1. When the zone furnace needs maintenance, the equipment can be isolated by closing the second valve 11 to facilitate maintenance. When the system is in normal use, the first valve 10 and the second valve 11 are in a normally open state.

[0043] The first bypass valve 4, the second bypass valve 5, the first water supply valve 9, the first valve 10, the second valve 11, the second water supply valve 24 and the drain valve 26 are all solenoid valves, and manual valves may also be used.

[0044] In some embodiments, the heat pump inlet valve 31, the air-cooled heat pump outlet valve 32, the water-cooling tower inlet valve 21, the water-cooling tower outlet valve 22, the first bypass valve 4, and the second bypass valve 5 are all solenoid valves. The constant temperature linkage water supply system for the zone furnace also includes a controller that controls the disconnection and conduction of the air-cooled heat pump inlet valve 31, the air-cooled heat pump outlet valve 32, the water-cooling tower inlet valve 21, the water-cooling tower outlet valve 22, the first bypass valve 4, and the second bypass valve 5 according to the ambient temperature to switch the system's operating mode. Specifically, the system includes a temperature sensor for measuring the ambient temperature, which is electrically connected to the controller. This temperature sensor is not shown in the figure.

[0045] The constant temperature linkage water supply system for the zone melting furnace provided by the present invention has at least three working modes, namely spring and autumn mode, summer mode and winter mode. The present invention can switch the working mode of the system according to the ambient temperature to ensure the provision of stable 20°C cooling water at all times throughout the year. For example, if the outdoor ambient temperature is greater than 25°C, the workload of the zone melting furnace for pulling polycrystalline / single crystal rods is large, and the temperature of the process water after passing through the equipment is greater than 20°C, the summer mode is used to reduce the process water temperature to 20°C through an air-cooled heat pump; if the outdoor ambient temperature is less than 15°C, the winter mode is used to reduce the process water temperature to 20°C through the water cooling and air cooling functions of a closed cooling tower; if the outdoor ambient temperature is within the range of 15°C to 25°C, the spring and autumn mode is used. The two methods are connected in series to solve the problem of excessively high external temperature and the inability of a single cooling device to control the temperature to 20°C.

[0046] by Figure 1 Taking the constant temperature linkage water supply system for the zone furnace as an example, which includes three air-cooled heat pumps 3, the working status of each component of the system in three modes is explained.

[0047] If you are in spring and autumn mode, see Figure 1 The closed water-cooling tower 2 is closed, while the zone furnace 1, buffer water tank 7, and three air-cooled heat pumps 3 are all open. The water-cooling tower inlet valve 21, water-cooling tower outlet valve 22, second bypass valve 5, first water supply valve 9, second water supply valve 24, and drain valve 26 are all closed. The air-cooled heat pump inlet valve 31, air-cooled heat pump outlet valve 32, first bypass valve 4, and first valve 10 are all open.

[0048] If in summer mode, see Figure 2 The closed water-cooling tower 2, zone furnace 1, buffer water tank 7, and three air-cooled heat pumps 3 are all open. The first bypass valve 4, second bypass valve 5, first water supply valve 9, second water supply valve 24, and drain valve 26 are all closed. The air-cooled heat pump inlet valve 31, air-cooled heat pump outlet valve 32, water-cooling tower inlet valve 21, water-cooling tower outlet valve 22, and first valve 10 are all open.

[0049] Compared with direct cooling through the air-cooled heat pump 3, which has a large temperature difference and high energy consumption, pre-cooling through the closed water-cooling tower 2 has a small temperature difference and low energy consumption of the air-cooled heat pump 3.

[0050] If in winter mode, see Figure 3 The closed water cooling tower 2 is open, while the zone furnace 1, buffer water tank 7, and three air-cooled heat pumps 3 are closed. The air-cooled heat pump inlet valve 31, air-cooled heat pump outlet valve 32, first bypass valve 4, first water supply valve 9, second water supply valve 24, and drain valve 26 are all closed. The water-cooling tower inlet valve 21, water-cooling tower outlet valve 22, second bypass valve 5, and first valve 10 are all open.

[0051] In winter mode, the system primarily operates with a closed cooling tower, eliminating the use of air-cooled heat pumps. During winter, when outside temperatures are low, the system controls the flow of cold air by adjusting the closed cooling tower's fan power, fully utilizing the cold air to meet the cooling requirements of the cooling water system, thereby reducing the system's overall energy consumption. Furthermore, since the air-cooled heat pumps are deactivated in winter, there's no need for building or heating facilities to protect the air-cooled heat pumps from freezing, thus reducing investment costs.

[0052] This utility model provides a concept and method for a constant temperature linked water supply system for a zone furnace. There are many specific methods and approaches for implementing this technical solution. The above is only a preferred embodiment of the utility model. It should be noted that those skilled in the art may make various improvements and modifications without departing from the principles of the utility model, and such improvements and modifications should also be considered within the scope of protection of the utility model. Any components not specified in this embodiment may be implemented using existing technologies.

Claims

1. A constant temperature linkage water supply system for a zone furnace, characterized in that: The invention comprises a zone melting furnace (1), a closed water cooling tower (2) and a multi-connected air-cooling heat pump module; the water inlet of the closed water cooling tower (2) is connected to a water cooling tower water inlet valve (21), and the water outlet is connected to a water cooling tower water outlet valve (22); the multi-connected air-cooling heat pump module comprises at least one air-cooling heat pump (3), the water inlet of the air-cooling heat pump (3) is connected to an air-cooling heat pump water inlet valve (31), and the water outlet is respectively connected to an air-cooling heat pump water outlet valve (32); the water outlet of the zone melting furnace (1) is connected to the water cooling tower water inlet valve (21) through a pipeline. The water inlet end of the air-cooled heat pump water inlet valve (31) is connected to the water outlet end of the water-cooling tower water inlet valve (21); the water outlet end of the air-cooled heat pump water outlet valve (32) is connected to the water inlet of the zone furnace (1); a first bypass valve (4) is provided between the water inlet end of the water-cooling tower water inlet valve (21) and the water outlet end of the water-cooling tower water outlet valve (22); a second bypass valve (5) is provided between the water inlet end of the air-cooled heat pump water inlet valve (31) and the water outlet end of the air-cooled heat pump water outlet valve (32).

2. The constant temperature linkage water supply system for a zone melting furnace according to claim 1, characterized in that: It comprises a water pump unit (6), and the water pump unit (6) is arranged on a pipeline connecting the water outlet of the zone furnace (1) and the water inlet end of the water cooling tower water inlet valve (21).

3. The constant temperature linkage water supply system for a zone melting furnace according to claim 2, characterized in that: The water pump unit (6) comprises a plurality of water pumps (61) connected in parallel, and a control valve (62) is provided at the water inlet and the water outlet of each water pump (61).

4. The constant temperature linkage water supply system for a zone melting furnace according to claim 3, characterized in that: It also includes a buffer water tank (7), which is arranged on a pipeline connecting the water outlet of the zone furnace (1) and the water inlet end of the water cooling tower water inlet valve (21) and is located between the zone furnace (1) and the water pump unit (6).

5. The constant temperature linkage water supply system for a zone melting furnace according to claim 4, characterized in that: A first valve (10) is also provided at the water inlet and the water outlet of the buffer water tank (7).

6. The constant temperature linkage water supply system for a zone melting furnace according to claim 4, characterized in that: The top of the buffer water tank (7) is connected to a circulating cooling water supply pipe (8), and a first water supply valve (9) for controlling the on-off of the circulating cooling water supply pipe (8) is provided on the circulating cooling water supply pipe (8).

7. The constant temperature linkage water supply system for a zone melting furnace according to claim 1, characterized in that: The closed water cooling tower (2) is connected to a water supply pipeline (23), and a second water supply valve (24) is provided on the water supply pipeline (23).

8. The constant temperature linkage water supply system for a zone melting furnace according to claim 1, characterized in that: The closed water cooling tower (2) is connected to a drainage pipeline (25), and a drainage valve (26) is provided on the drainage pipeline (25).

9. The constant temperature linkage water supply system for a zone melting furnace according to claim 1, characterized in that: The constant temperature linkage water supply system for the zone furnace also includes a controller, wherein the closed water cooling tower (2), the air cooling heat pump (3), the air cooling heat pump water inlet valve (31), the air cooling heat pump water outlet valve (32), the water cooling tower water inlet valve (21), the water cooling tower water outlet valve (22), the first bypass valve (4) and the second bypass valve (5) are respectively electrically connected to the controller; the controller controls the start and stop of the closed water cooling tower (2) and the air cooling heat pump (3) and the cut-off and conduction of the air cooling heat pump water inlet valve (31), the air cooling heat pump water outlet valve (32), the water cooling tower water inlet valve (21), the water cooling tower water outlet valve (22), the first bypass valve (4) and the second bypass valve (5) according to the ambient temperature.

10. The constant temperature linkage water supply system for a zone melting furnace according to claim 9, characterized in that: A temperature sensor for measuring ambient temperature is included, and the temperature sensor is electrically connected to the controller.

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