CN112556303A - Cooling water circulation system - Google Patents
Cooling water circulation system Download PDFInfo
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- CN112556303A CN112556303A CN202010982174.8A CN202010982174A CN112556303A CN 112556303 A CN112556303 A CN 112556303A CN 202010982174 A CN202010982174 A CN 202010982174A CN 112556303 A CN112556303 A CN 112556303A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D31/00—Other cooling or freezing apparatus
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D17/00—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
- F25D17/02—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating liquids, e.g. brine
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D29/00—Arrangement or mounting of control or safety devices
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Abstract
The invention discloses a cooling water circulation system, which solves the technical problems of high energy consumption, large sewage discharge amount and environmental pollution of the existing cooling water circulation system inside and outside a tunnel. The invention comprises a water inlet unit, a heat exchange unit and a drainage unit which are connected in sequence, wherein an internal refrigeration cycle and an external refrigeration cycle are arranged among the water inlet unit, the heat exchange unit and the drainage unit, the internal refrigeration cycle is positioned in a construction site, the external refrigeration cycle is positioned outside the construction site, and the water inlet unit, the heat exchange unit, the drainage unit, the internal refrigeration cycle and the external refrigeration cycle form a closed loop system and are all connected with an upper computer. The invention can complete the high-efficiency heat exchange inside and outside the tunnel, so that the tunnel is cool and is more suitable for the high-efficiency work of tunnel equipment and personnel; the sewage discharge is effectively reduced; the electric energy loss caused by long-term invalid operation of the water inlet pump and the water discharge pump is avoided, and the high efficiency and the stability of the whole system can be automatically maintained; the construction use area outside the tunnel is reduced.
Description
Technical Field
The invention relates to the technical field of cooling systems, in particular to a cooling water circulation system.
Background
The cooling water circulation system is a water supply system for cooling water to exchange heat, reduce the temperature and recycle. The principle of the system is that water is used as a cooling medium and is a cooling water system which is recycled and mainly comprises cooling equipment, a water pump and a pipeline. After cold water flows through production equipment (often called heat exchange equipment such as a heat exchanger, a condenser and a reactor) needing cooling, the temperature rises, and if the cold water is discharged immediately, the cold water is used only once (called a direct-current cooling water system); the temperature of the heating cold water flowing through the cooling equipment is reduced again, the heating cold water can be pumped back to the production equipment for reuse, the consumption of the cold water can be greatly reduced, and the consumption can be saved by over 95 percent. The cooling water accounts for about 70% of the industrial water consumption, so that the cooling water circulation system plays a role in saving a large amount of industrial water.
The existing cooling water circulation system inside and outside the tunnel comprises a water inlet unit, a heat exchange unit and a water drainage unit, and has the following serious defects: (1) because the temperature difference between the cooling water inside and outside the tunnel is small, a large amount of cooling water needs to be conveyed into the tunnel outside the tunnel. Namely, the cooling water with small temperature difference and large flow is continuously supplied, so that the water resource can not be fully utilized, and the waste of the electric power resource used by water inlet is caused; (2) due to the fact that the one-way hole external cooling water is adopted to enter water, a large amount of cooling water is discharged together with sewage after entering the sewage tank, water resources are wasted, a large amount of water needs to be precipitated in a three-level mode outside the hole, and water discharged after the precipitation in the three-level mode can pollute surface water sources outside the hole.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a cooling water circulation system, which solves the technical problems of high energy consumption, large sewage discharge amount and environmental pollution of the existing cooling water circulation systems inside and outside the tunnel.
The technical scheme of the invention is realized as follows: the cooling water circulation system comprises a water inlet unit, a heat exchange unit and a drainage unit which are sequentially connected, wherein the water inlet unit is used for supplying cold water with relatively low temperature to the heat exchange unit, the temperature of the cold water in the heat exchange unit is increased after heat exchange with a place or equipment needing cooling is completed, and the cold water is discharged through the drainage unit after the temperature of the cold water is increased. An inner refrigeration cycle and an outer refrigeration cycle are arranged among the water inlet unit, the heat exchange unit and the drainage unit, the inner refrigeration cycle is located in a construction site, the outer refrigeration cycle is located outside the construction site, and the water inlet unit, the heat exchange unit, the drainage unit, the inner refrigeration cycle and the outer refrigeration cycle form a closed-loop system and are all connected with an upper computer. The internal refrigeration cycle and the external refrigeration cycle are matched with each other, and the cold water with the increased temperature is cooled twice and then recycled. The warm water with the temperature increased after heat exchange with a place or equipment needing temperature reduction is directly connected with the internal refrigeration cycle or the external refrigeration cycle, although the temperature is higher than that of inlet water, the water volume is larger, and the temperature difference is smaller during refrigeration, so that the heat carried by the warm water is as much, and the warm water can be reliably cooled by the internal refrigeration cycle or the external refrigeration cycle.
Furthermore, the internal refrigeration cycle is arranged between the heat exchange unit and the water discharge unit, and the external refrigeration cycle is arranged between the water discharge unit and the water inlet unit, so that the whole water cycle is simple and reasonable in arrangement, and the phenomenon that the temperature of cold water rises in the process of conveying the overlong pipeline to reduce the heat exchange efficiency is avoided.
Further, the external refrigeration cycle comprises an external cold water tank connected with the water inlet unit and the water drainage unit, the external cold water tank is connected with an external cold water unit, and the external cold water unit is connected with the upper computer. The outer cold water tank is used for supplying cold water to the water inlet unit and receiving water discharged by the water discharging unit, and the water chilling unit refrigerates water in the outer cold water tank so as to cool the water discharged by the water discharging unit and supply the cooled water to the water inlet unit.
Furthermore, the external water chilling unit is a screw water chilling unit, a vortex water chilling unit or a centrifugal water chilling unit and is connected with a cooling tower, namely the water chilling unit adopts a water-cooled structure.
Furthermore, the external cold water unit is connected with the external cold water tank through a circulating pipeline, a circulating water pump and a first flow meter are arranged on the circulating pipeline, the circulating water pump brings heat of return water in the external cold water tank to the external cold water unit for cooling, and the circulating water pump and the first flow meter are both connected with an upper computer. And if the first flow meter detects no flow, the upper computer controls the circulating water pump and the water cooling unit to stop.
Further, the water inlet unit comprises a water inlet pipe with one end connected with the outer cold water tank, the other end of the water inlet pipe is connected with the inner cold water tank, a first liquid level sensor connected with the upper computer is arranged in the inner cold water tank, a water inlet pump connected with the upper computer is arranged on the water inlet pipe, the water inlet pump is connected with a water inlet pump water inlet pressure sensor or/and a water inlet pump outlet pressure sensor connected with the upper computer, and an electric ball valve connected with the upper computer is arranged on the water inlet pipe between the water inlet pump and the inner cold water tank. When the liquid level that detects interior cold water tank when first level sensor crosses lowly, the host computer control electric ball valve is opened, then intake pump outlet pressure sensor detects the pressure drop in the pipeline, and the host computer control intake pump starts in order to maintain the pressure that the host computer set for, and electric ball valve closes after the liquid level of interior cold water tank reaches the host computer and sets for the height. After the electric ball valve is closed, the pressure of the pressure sensor at the outlet of the water inlet pump is maintained stable, and the upper computer controls the water inlet pump to be closed. The control of the water inlet pump is related to the pressure, when the pressure is reduced, the water inlet pump is started to supplement cold water into the internal cold water tank, and when the pressure is stable, the water inlet pump is stopped.
Furthermore, be provided with into water pneumatic tank between intake pump and the electric ball valve, the effect of the pneumatic tank of intaking is, has a small amount of leaking when the pipeline, also can maintain the stable pressure of pipeline, avoids the frequent start-up of intake pump.
Furthermore, the heat exchange unit comprises a main heat exchange device connected with the inner cold water tank through a cold water pump, and the cold water pump can convey cold water in the inner cold water tank to the main heat exchange device to cool the main heat exchange device. The main heat exchange equipment returns to the main heat exchange equipment through the heat exchange circulating water tank, the heat exchange circulating water pump and the secondary heat exchange equipment in sequence and then is connected with the internal refrigeration cycle. I.e. the heat exchange unit is also a circulation unit.
Furthermore, the internal refrigeration cycle comprises an internal cooling water unit connected with the main heat exchange device, the refrigerator can carry out primary cooling on the water subjected to heat exchange, and the water outlet end of the internal cooling water unit is connected with the external refrigeration cycle through a drainage unit so as to carry out secondary cooling in the external refrigeration cycle through the drainage unit instead of directly discharging the water outside in the traditional mode. An electronic water treatment instrument is arranged between the inner cooling water unit and the main heat exchange equipment, so that the scale of a heat exchanger in the inner cooling water unit can be effectively reduced, and high-efficiency heat exchange is ensured.
Furthermore, the inner cooling water unit is a screw type water chilling unit, a vortex type water chilling unit or a centrifugal type water chilling unit and is connected with an air cooler, and the air cooler is arranged in a ventilation pipeline provided with a primary fan and a secondary fan.
Furthermore, the drainage unit comprises a cache water tank connected with the water outlet end of the inner cooling water unit, the cache water tank is connected with the outer cooling water tank through a drainage pipe, and a second liquid level sensor connected with the upper computer is arranged in the cache water tank. The drain pipe is provided with a drain pump connected with the upper computer, the drain pump is connected with a drain pump water inlet pressure sensor or/and a drain pump outlet pressure sensor connected with the upper computer, and a drain air pressure tank is arranged between the drain pump and the external cold water tank. The upper computer controls the starting and stopping of the drainage pump according to the real-time monitoring of the second liquid level sensor on the cache water tank, and controls the running power of the drainage pump in real time according to the monitoring of the drainage pump inlet pressure sensor or the drainage pump outlet pressure sensor on the drainage pipe pressure.
Furthermore, the circulating water pump, the water inlet pump, the cold water pump, the drainage pump and the heat exchange circulating water pump are all connected with the upper computer, at least one of the circulating water pump, the water inlet pump, the cold water pump, the drainage pump and the heat exchange circulating water pump is a variable frequency water pump, and the upper computer can automatically control the circulating water pump and can also ensure that the whole system can operate efficiently, energy-saving and stably.
Furthermore, the heat exchange unit and the internal refrigeration cycle are arranged in a long-distance tunnel with a large diameter, the external refrigeration cycle is arranged outside the tunnel, the tunnel driving equipment of the heat exchange unit is connected, and the diameter of a pipeline outside the tunnel is larger than that of a pipeline inside the tunnel.
The invention forms a closed loop system by adopting the internal refrigeration cycle, the external refrigeration cycle and the heat exchange unit, effectively improves the temperature difference of the cooling water entering and exiting the tunnel, compared with the traditional open system, the invention can use less cooling water when taking away the same heat, thereby completing the high-efficiency heat exchange inside and outside the tunnel, and leading the tunnel to be cool and more suitable for the high-efficiency work of tunnel equipment and personnel; the sewage discharge is effectively reduced, and the pollution to the environment is reduced; the electric energy loss caused by long-term invalid operation of the water inlet pump and the water discharge pump is avoided, and the high efficiency and the stability of the whole system are automatically maintained by adopting the variable-frequency constant-pressure water pump; and a three-stage sedimentation tank is not needed, so that the construction use area outside the tunnel is reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention, the drawings that are needed in the description of the embodiments will be briefly described below, and fig. 1-3 will be combined to form a complete drawing of the present invention. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.
FIG. 1 is a schematic diagram of an external refrigeration cycle and a portion of a water inlet unit of the present invention;
FIG. 2 is a schematic diagram of a portion of the water inlet unit, internal refrigeration cycle and water discharge unit of the present invention;
FIG. 3 is a schematic view of a heat exchange unit of the present invention;
in the figure; 1-heat exchange circulating water pump; 2-secondary heat exchange equipment; 3-heat exchange circulation water tank; 4-primary heat exchange equipment; 5-a water-draining air pressure tank; 6-a drainage one-way valve; 7-drain pump outlet pressure sensor; 8, draining the pump; 9-a water inlet pressure sensor of a drainage pump; 10-a buffer water tank; 11-internal cold water tank; 12-a cold water pump; 13-an inner cooling water unit; 14-electronic water treatment instrument; 15-air cooler; 16-a secondary air fan; 17-an out-of-tunnel pipeline; 19-a primary air fan; 20-water inlet air pressure tank; 21-water inlet one-way valve; 22-inlet pump outlet pressure sensor; 23-a water inlet pump; 24-a water inlet pressure sensor of a water inlet pump; 25-a cooling tower; 26-a cooling tower circulating water pump; 27-a second flow meter; 28-external water chiller; 29-a first flow meter; 30-a circulating water pump; 31-a protective shed; 32-protective shed heat dissipation port; 33-an electric ball valve; 34-a first level sensor; 35-an external cold water tank; 36-second liquid level sensor.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive effort based on the embodiments of the present invention, are within the scope of the present invention.
Embodiment 1, a cooling water circulation system, includes water inlet unit, heat exchange unit and the drainage unit that links to each other in proper order, and water inlet unit is used for supplying the lower cold water of relative temperature to heat exchange unit, and the temperature rose after cold water in the heat exchange unit and the place or equipment that need the cooling accomplished heat exchange, and the cold water is discharged through the drainage unit after the temperature rose.
An inner refrigeration cycle and an outer refrigeration cycle are arranged among the water inlet unit, the heat exchange unit and the drainage unit, the inner refrigeration cycle is located in a construction site, the outer refrigeration cycle is located outside the construction site, and the water inlet unit, the heat exchange unit, the drainage unit, the inner refrigeration cycle and the outer refrigeration cycle form a closed-loop system and are all connected with an upper computer. The internal refrigeration cycle and the external refrigeration cycle are matched with each other, and the cold water with the increased temperature is cooled twice and then recycled. The warm water with the temperature increased after heat exchange with a place or equipment needing temperature reduction is directly connected with the internal refrigeration cycle or the external refrigeration cycle, although the temperature is higher than that of inlet water, the water volume is larger, and the temperature difference is smaller during refrigeration, so that the heat carried by the warm water is as much, and the warm water can be reliably cooled by the internal refrigeration cycle or the external refrigeration cycle.
Preferably, as shown in fig. 1-3, the inner refrigeration cycle is arranged between the heat exchange unit and the water discharge unit, and the outer refrigeration cycle is arranged between the water discharge unit and the water inlet unit, so that the arrangement of the whole water cycle is simple and reasonable, and the problems that the redundant pipelines are overlong and the heat exchange efficiency is reduced due to the temperature rise of cold water in the process of conveying the overlong pipelines are avoided.
Specifically, as shown in fig. 1, the external refrigeration cycle includes an external cold water tank 35 connected to the water inlet unit and the water discharge unit, the external cold water tank 35 is connected to an external cold water unit 28, and the external cold water unit 28 is connected to an upper computer. The outer cold water tank 35 is used for supplying cold water to the water inlet unit and receiving water discharged from the water discharge unit, and the water chilling unit 28 chills the water in the outer cold water tank 35 so as to cool the water discharged from the water discharge unit and supply the cooled water to the water inlet unit again.
The external water chilling unit 28 is a screw water chilling unit, a vortex water chilling unit or a centrifugal water chilling unit and is connected with a cooling tower 25, namely the water chilling unit 28 adopts a water-cooled structure. The external water chilling unit 28 is preferably a screw water chilling unit, the screw water chilling unit is connected with the external water chilling tank 35 through a circulating pipeline, a circulating water pump 30 and a first flowmeter 29 which are connected with an upper computer are arranged on the circulating pipeline, and the circulating water pump 30 brings heat of return water in the external water chilling tank 35 to an evaporator of the screw water chilling unit for cooling. When the first flowmeter 29 detects that there is no flow, the upper computer controls the circulating water pump 30 and the water chiller unit 28 to stop.
A circulating pipeline is arranged between the cooling tower 25 and a condenser of the screw type water chilling unit, a second flowmeter 27 and a cooling tower circulating water pump 26 are arranged on the circulating pipeline, and heat brought by circulation of the circulating water pump 30 is diffused to the atmosphere through the cooling tower 25 and a circulating water pool in the cooling tower by the cooling tower circulating water pump 26. The outer cold water tank 35, the outer cold water unit 28 and the cooling tower 25 are all arranged in the protective shed 31, and the top of the protective shed 31 is provided with a protective shed heat dissipation port 32 corresponding to the cooling tower 25 and a circulating water pool in the cooling tower.
As shown in fig. 1 and 2, the water inlet unit includes a water inlet pipe having one end connected to an external cold water tank 35, the other end of the water inlet pipe is connected to an internal cold water tank 11, a first liquid level sensor 34 connected to an upper computer is provided in the internal cold water tank 11, and a water inlet pump 23 connected to the upper computer is provided on the water inlet pipe. The water inlet pump 23 is connected with a water inlet pump inlet pressure sensor 24 and a water inlet pump outlet pressure sensor 22 which are connected with an upper computer, and an electric ball valve 33 and a water inlet one-way valve 21 which are connected with the upper computer are arranged on a water inlet pipe between the water inlet pump 23 and the inner cooling water tank 11. When the first liquid level sensor 34 detects that the liquid level of the inner cold water tank 11 is too low, the upper computer controls the electric ball valve 33 to be opened, the pressure sensor 22 at the outlet of the water inlet pump detects the pressure reduction in the pipeline, the upper computer controls the water inlet pump 23 to be started to maintain the pressure set by the upper computer, and the electric ball valve 33 is closed until the liquid level of the inner cold water tank 11 reaches the set height of the upper computer. After the electric ball valve 33 is closed, the pressure of the inlet pump outlet pressure sensor 22 is maintained stable, and the upper computer controls the inlet pump 23 to be closed. That is, the control of the feed pump 23 is pressure-dependent, and when the pressure drops, the feed pump 23 is activated to supply cold water to the cold water tank 11, and when the pressure is stabilized, the feed pump 23 is stopped.
Further, a water inlet air pressure tank 20 is arranged between the water inlet pump 23 and the electric ball valve 33, and the water inlet air pressure tank 20 is used for maintaining stable pressure of the pipeline when a small amount of water leaks from the pipeline, so that frequent starting of the water inlet pump 23 is avoided. The water inlet air pressure tank 20, the water inlet check valve 21, the water inlet pump outlet pressure sensor 22, the water inlet pump 23 and the water inlet pump inlet pressure sensor 24 are all arranged in the protective shed 31.
As shown in fig. 2 and 3, the heat exchange unit includes a main heat exchange device 4 connected to an internal cold water tank 11 through a cold water pump 12, and the cold water pump 12 can deliver cold water in the internal cold water tank 11 to the main heat exchange device 4 to cool the main heat exchange device 4. The main heat exchange equipment 4 returns to the main heat exchange equipment 4 through the heat exchange circulating water tank 3, the heat exchange circulating water pump 1 and the secondary heat exchange equipment 2 in sequence and then is connected with the internal refrigeration cycle, namely, the heat exchange unit is also a circulating unit.
As shown in fig. 2, the internal refrigeration cycle includes an internal cooling water unit 13 connected to the main heat exchange device 4, the refrigerator 13 can perform primary cooling on the heat-exchanged water, and a water outlet end of the internal cooling water unit 13 is connected to the external refrigeration cycle through a water drainage unit, so as to perform secondary cooling in the external refrigeration cycle through the water drainage unit, instead of directly discharging the water outside in the conventional manner. An electronic water treatment instrument 14 is arranged between the inner cooling water unit 13 and the main heat exchange equipment 4, so that scale formation of a heat exchanger in the inner cooling water unit 13 can be effectively reduced, and efficient heat exchange is guaranteed.
Further, the inner cooling water unit 13 is a screw type water chiller, a scroll type water chiller or a centrifugal type water chiller and is connected with an air cooler 15, the air cooler 15 is installed in a ventilation pipeline provided with a primary fan 19 and a secondary fan 16, and the air cooler 15 carries out air heat dissipation on the inner cooling water unit 13. The ventilation pipeline can play a role in radiating the inner cooling water unit 13 and can ventilate and radiate a construction site.
As shown in fig. 2 and fig. 1, the drainage unit includes a buffer water tank 10 connected to the water outlet end of the inner cooling water unit 13, the buffer water tank 10 is connected to the outer cooling water tank 35 through a drainage pipe, and a second liquid level sensor 36 connected to an upper computer is disposed in the buffer water tank 10. The drain pipe is provided with a drain pump 8 connected with the upper computer, the drain pump 8 is connected with a drain pump water inlet pressure sensor 9 and a drain pump outlet pressure sensor 7 connected with the upper computer, a drain air pressure tank 5 is arranged between the drain pump 8 and the external cold water tank 35, and a drain check valve 6 is arranged between the drain pump 8 and the drain air pressure tank 5. The upper computer controls the start and stop of the drainage pump 8 according to the real-time monitoring of the second liquid level sensor 36 on the cache water tank 10, and controls the running power of the drainage pump 8 in real time according to the monitoring of the drainage pump inlet pressure sensor 9 and the drainage pump outlet pressure sensor 7 on the drainage pipe pressure.
Furthermore, the circulating water pump 30, the cooling tower circulating water pump 26, the water inlet pump 23, the cold water pump 12, the drainage pump 8 and the heat exchange circulating water pump 1 are all connected with the upper computer and are frequency conversion water pumps, and when the upper computer performs automatic control on the frequency conversion water pumps, the whole system can be guaranteed to run efficiently, energy-saving and stably.
The other structure of this embodiment is the same as embodiment 1.
Nothing in this specification is intended to be exhaustive of all conventional and well known techniques.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (13)
1. The utility model provides a cooling water circulation system, includes consecutive water inlet unit, heat exchange unit and drainage unit, its characterized in that: an inner refrigeration cycle and an outer refrigeration cycle are arranged among the water inlet unit, the heat exchange unit and the drainage unit, the inner refrigeration cycle is located in a construction site, the outer refrigeration cycle is located outside the construction site, and the water inlet unit, the heat exchange unit, the drainage unit, the inner refrigeration cycle and the outer refrigeration cycle form a closed-loop system and are all connected with an upper computer.
2. The cooling water circulation system according to claim 1, wherein: the inner refrigeration cycle is arranged between the heat exchange unit and the water discharge unit, and the outer refrigeration cycle is arranged between the water discharge unit and the water inlet unit.
3. The cooling water circulation system according to claim 2, wherein: the external refrigeration cycle comprises an external cold water tank (35) connected with the water inlet unit and the water discharge unit, the external cold water tank (35) is connected with an external cold water unit (28), and the external cold water unit (28) is connected with an upper computer.
4. The cooling water circulation system according to claim 3, wherein: the external water chilling unit (28) is a screw water chilling unit, a vortex water chilling unit or a centrifugal water chilling unit and is connected with a cooling tower (25).
5. The cooling water circulation system according to claim 3 or 4, wherein: the external water chilling unit (28) is connected with the external cold water tank (35) through a circulating pipeline, a circulating water pump (30) and a first flow meter (29) are arranged on the circulating pipeline, and the circulating water pump (30) and the first flow meter (29) are both connected with the upper computer.
6. The cooling water circulation system according to claim 5, wherein: the water inlet unit comprises a water inlet pipe with one end connected with an outer cold water tank (35), the other end of the water inlet pipe is connected with an inner cold water tank (11), a first liquid level sensor (34) connected with an upper computer is arranged in the inner cold water tank (11), a water inlet pump (23) connected with the upper computer is arranged on the water inlet pipe, the water inlet pump (23) is connected with a water inlet pump inlet water pressure sensor (24) or/and a water inlet pump outlet pressure sensor (22) connected with the upper computer, and an electric ball valve (33) connected with the upper computer is arranged on the water inlet pipe between the water inlet pump (23) and the inner cold water tank (11).
7. The cooling water circulation system according to claim 6, wherein: and a water inlet air pressure tank (20) is arranged between the water inlet pump (23) and the electric ball valve (33).
8. The cooling water circulation system according to claim 7, wherein: the heat exchange unit comprises a main heat exchange device (4) connected with an inner cooling water tank (11) through a cold water pump (12), and the main heat exchange device (4) returns to the main heat exchange device (4) through a heat exchange circulating water tank (3), a heat exchange circulating water pump (1) and a secondary heat exchange device (2) in sequence and then is connected with an internal refrigeration cycle.
9. The cooling water circulation system according to claim 8, wherein: the internal refrigeration cycle comprises an internal cooling water unit (13) connected with the main heat exchange equipment (4), an electronic water treatment instrument (14) is arranged between the internal cooling water unit (13) and the main heat exchange equipment (4), and the water outlet end of the internal cooling water unit (13) is connected with a water drainage unit.
10. The cooling water circulation system according to claim 9, wherein: the inner cooling water unit (13) is a screw type water chilling unit, a vortex type water chilling unit or a centrifugal type water chilling unit and is connected with an air cooler (15), and the air cooler (15) is arranged in a ventilation pipeline provided with a primary fan (19) and a secondary fan (16).
11. The cooling water circulation system according to claim 9 or 10, wherein: the drainage unit comprises a buffer water tank (10) connected with the water outlet end of the inner cooling water unit (13), a second liquid level sensor (36) connected with an upper computer is arranged in the buffer water tank (10), the buffer water tank (10) is connected with an outer cooling water tank (35) through a drainage pipe, a drainage pump (8) connected with the upper computer is arranged on the drainage pipe, the drainage pump (8) is connected with a drainage pump water inlet pressure sensor (9) or/and a drainage pump outlet pressure sensor (7) connected with the upper computer, and a drainage air pressure tank (5) is arranged between the drainage pump (8) and the outer cooling water tank (35).
12. The cooling water circulation system according to claim 10, wherein: the circulating water pump (30), the water inlet pump (23), the cold water pump (12), the drainage pump (8) and the heat exchange circulating water pump (1) are all connected with the upper computer, and at least one of the circulating water pump, the cold water pump and the heat exchange circulating water pump is a variable frequency water pump.
13. The cooling water circulation system according to claim 11, wherein: the heat exchange unit and the internal refrigeration cycle are arranged in a long-distance tunnel with a large diameter, the external refrigeration cycle is arranged outside the tunnel, the heat exchange unit is connected with tunneling equipment, and the diameter of an external tunnel pipeline (18) is larger than that of an internal tunnel pipeline (17).
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| CN202010982174.8A CN112556303A (en) | 2020-09-17 | 2020-09-17 | Cooling water circulation system |
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| CN202010982174.8A CN112556303A (en) | 2020-09-17 | 2020-09-17 | Cooling water circulation system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114593547A (en) * | 2022-02-15 | 2022-06-07 | 中铁工程装备集团有限公司 | A kind of non-stop driving cooling system and non-stop driving cooling method of roadheader |
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Cited By (2)
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| CN114593547A (en) * | 2022-02-15 | 2022-06-07 | 中铁工程装备集团有限公司 | A kind of non-stop driving cooling system and non-stop driving cooling method of roadheader |
| CN114593547B (en) * | 2022-02-15 | 2025-02-28 | 中铁工程装备集团有限公司 | Non-stop tunneling cooling system and non-stop tunneling cooling method for tunnel boring machine |
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