CN212344356U - Public cooling system for converter station of offshore flexible direct current transmission project - Google Patents
Public cooling system for converter station of offshore flexible direct current transmission project Download PDFInfo
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- CN212344356U CN212344356U CN202021695863.2U CN202021695863U CN212344356U CN 212344356 U CN212344356 U CN 212344356U CN 202021695863 U CN202021695863 U CN 202021695863U CN 212344356 U CN212344356 U CN 212344356U
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Abstract
The utility model relates to a public cooling system for marine flexible direct current transmission engineering converter station. The utility model aims at providing a public cooling system for marine flexible direct current transmission engineering converter station to improve the reliability and the stability of whole converter station operation. The technical scheme of the utility model is that: a public cooling system for a converter station of an offshore flexible direct current transmission project is characterized in that: the heat exchanger comprises a seawater circulation module, a fresh water circulation module and a heating equipment circulating cooling module, wherein a plurality of heat exchangers I used for heat exchange between the seawater circulation module and the fresh water circulation module are arranged between the seawater circulation module and the fresh water circulation module, and a plurality of heat exchangers II used for heat exchange between the fresh water circulation module and the heating equipment circulating cooling module are arranged between the fresh water circulation module and the heating equipment circulating cooling module. The utility model is suitable for a direct current transmission field.
Description
Technical Field
The utility model relates to a public cooling system for marine flexible direct current transmission engineering converter station. The method is suitable for the field of direct current transmission.
Background
With the rapid development of new energy industry, the construction scale of offshore wind power is gradually enlarged, and the problem of transmitting the generated electric energy to a corresponding power utilization area is immediately faced. According to past experience, a traditional wind power transmission mode generally adopts a high-voltage alternating current grid-connected mode, but the mode is only limited to a small-scale offshore wind farm. With the development of offshore wind power into deep and far sea large-scale development, a high-voltage flexible direct-current transmission mode is more economical than a high-voltage alternating-current transmission mode, so that the construction of an offshore converter station for current conversion and voltage boosting is carried out at the same time.
Electric equipment such as a converter valve, a connecting transformer and the like of the offshore converter station can generate a large amount of heat (in ten thousand kW level) in the operation process, and timely and reliable cooling of various emission equipment is a basic premise for safe operation of the offshore converter station.
The offshore converter station is located in the open sea, the temperature of the seawater is relatively stable and inexhaustible, and the seawater is taken as a cooling water source according to local conditions, so that the offshore converter station has a very obvious cost advantage. However, seawater is complex in composition and highly corrosive, and is not suitable for direct cooling of various equipment of the converter station. If the seawater is directly used for heat exchange and cooling with the cooling medium in the heating equipment, once leakage occurs, the seawater with high conductivity enters the inner cooling circulation system with low conductivity, the normal operation of the equipment can be seriously influenced, and even the equipment is shut down or damaged.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is: in order to solve the existing problems, the public cooling system for the converter station of the offshore flexible direct current transmission project is provided, so that the operation reliability and stability of the whole converter station are improved.
The utility model adopts the technical proposal that: a public cooling system for a converter station of an offshore flexible direct current transmission project is characterized in that: the heat exchanger comprises a seawater circulation module, a fresh water circulation module and a heating equipment circulating cooling module, wherein a plurality of heat exchangers I used for heat exchange between the seawater circulation module and the fresh water circulation module are arranged between the seawater circulation module and the fresh water circulation module, and a plurality of heat exchangers II used for heat exchange between the fresh water circulation module and the heating equipment circulating cooling module are arranged between the fresh water circulation module and the heating equipment circulating cooling module.
The seawater circulation module is provided with a seawater pump set, a water suction port of the seawater pump set is positioned below the sea level, a water outlet of the seawater pump set is communicated with a cold side input end of the heat exchanger I through a seawater filter, and a cold side output end of the heat exchanger I is connected into the sea through a water outlet pipe.
The fresh water circulation module is provided with a fresh water pipeline I which is communicated with the hot side output end of the heat exchanger I and the cold side input end of the heat exchanger II, and a fresh water pipeline II which is communicated with the cold side output end of the heat exchanger II and the hot side input end of the heat exchanger I, wherein a centrifugal pump set is arranged on the fresh water pipeline I.
And the fresh water pipeline I is connected with a fresh water supplementing and pressure stabilizing device.
The air conditioner condensation heat exchanger is connected with the seawater circulation module to take seawater as a cold source; the air conditioner condensation heat exchanger is connected with the heat-generating equipment circulating cooling module to cool heat emitted to air by the electrical equipment as a heat source.
The seawater circulation module also comprises a marine organism prevention device.
The marine organism prevention device adopts a sodium hypochlorite generator.
The utility model has the advantages that: the heat transfer of seawater and fresh water is utilized by the seawater circulation module and the fresh water circulation module to effectively cool each heating device of the offshore platform. The area where the seawater flows is located in the external cooling part, but the seawater only occupies a small part of the whole cooling system, and the fresh water occupies a large proportion in the system. When the system runs by using fresh water, the corrosion to pipelines, valve accessories and the like is greatly reduced, the period of regular maintenance is obviously prolonged, the maintenance cost is reduced, the requirements on the materials of the pipes and the accessories under the condition of fresh water running are reduced, the optional range is enlarged, and the material cost is reduced. The temperature in the system is controlled by the starting quantity and frequency of the pump sets, is irrelevant to the temperature of the seawater, can keep stable temperature, is favorable for reducing mechanical abrasion and saves electric energy. When the temperature of the equipment is higher, the starting frequency and the number of the corresponding pump groups are properly increased; when the temperature of the equipment is lower, the frequency and the number of the starting of the corresponding pump sets are reduced so as to keep the temperature of the whole system stable within a certain range.
Drawings
Fig. 1 is a schematic structural diagram of the embodiment.
In the figure: 1. a seawater pump set; 2. a seawater filter; 3. a heat exchanger I; 4. an air conditioner condensing heat exchanger; 5. Fresh water supplement and pressure stabilization device; 6. a centrifugal pump set; 7. a heat exchanger II; 701. a valve cooled heat exchanger; 702. a transformer heat exchanger; 8. marine life prevention device.
Detailed Description
As shown in fig. 1, the present embodiment is a public cooling system for a converter station of an offshore flexible direct current transmission project, and the public cooling system includes a seawater circulation module, a fresh water circulation module, and a heating equipment circulation cooling module, wherein a plurality of heat exchangers i are disposed between the seawater circulation module and the fresh water circulation module, and a plurality of heat exchangers ii are disposed between the fresh water circulation module and the heating equipment circulation cooling module.
In the embodiment, the seawater circulation module is provided with a seawater pump set, a seawater filter and a marine organism prevention device, a water suction port of the seawater pump set is located a certain distance below the sea level, a water outlet of the seawater pump set is communicated with cold side input ends of 3 heat exchangers I after passing through the seawater filter, and cold side output ends of the heat exchangers I are connected into the sea through a water outlet pipe.
The marine organism preventing device in the embodiment adopts the sodium hypochlorite generator, partial seawater treated by the seawater filter enters the marine organism preventing device, the device generates sodium hypochlorite by electrolyzing seawater and conveys the sodium hypochlorite to the water suction port of the seawater pump set, and all pipe sections and parts of the seawater circulating unit are guaranteed not to be influenced by marine organisms.
The fresh water circulation module in the embodiment is provided with a fresh water pipeline I and a fresh water pipeline II, the fresh water pipeline I is communicated with a hot side output end of the heat exchanger I and a cold side input end of the heat exchanger II, and the fresh water pipeline I is provided with a centrifugal pump set; and the fresh water pipeline II is communicated with the cold measurement output end of the heat exchanger II and the hot side input end of the heat exchanger I.
In the embodiment, a fresh water supplementing and pressure stabilizing device is connected to the fresh water pipeline I, so that the stability of the middle fresh water circulating unit is ensured by supplementing fresh water and adjusting pipeline pressure, and the normal operation of the whole cooling system is further ensured.
In this embodiment, the heat exchanger ii includes a valve cooling heat exchanger and a transformer heat exchanger, and in this embodiment, the heat generating equipment circulating cooling module includes a deionized water pipeline i connected to a hot-side input end of the valve cooling heat exchanger, a deionized water pipeline ii connected to a hot-side output end of the valve cooling heat exchanger, a transformer oil pipeline i connected to a hot-side input end of the transformer heat exchanger, and a transformer oil pipeline ii connected to a hot-side output end of the transformer heat exchanger.
The embodiment also comprises an air conditioner condensing heat exchanger, wherein part of seawater treated by the seawater filter in the seawater circulation module enters the cold side input end of the air conditioner condensing heat exchanger, and the cold side output end of the air conditioner condensing heat exchanger is connected into the sea through a water outlet pipe; the air conditioner condensation heat exchanger is connected with the heating equipment circulating cooling module. When the ambient temperature is higher in summer, the air conditioner condensing heat exchanger takes seawater as a cold source and carries out refrigeration through an air conditioner system; when the ambient temperature is lower in winter, the condensing heat exchanger of the air conditioner takes the heat productivity of equipment as a heat source, and the air conditioning system heats and heats.
The cooling method of this example is as follows:
carrying out primary heat exchange on the deionized water and the transformer oil and cooled equipment to obtain high-temperature inner cooling water and high-temperature transformer oil;
the high-temperature inner cooling water and the high-temperature transformer oil respectively and simultaneously perform secondary heat exchange with the low-temperature fresh water of the middle fresh water circulation module, and the low-temperature fresh water is converted into high-temperature fresh water;
and performing third heat exchange between the high-temperature fresh water and the low-temperature seawater of the seawater circulation module to form high-temperature seawater, and discharging the high-temperature seawater into the sea.
The above embodiments are only used for explaining the inventive concept of the present invention, and not for limiting the protection of the claims of the present invention, and all the insubstantial modifications of the present invention using the inventive concept shall fall within the protection scope of the present invention.
Claims (7)
1. A public cooling system for a converter station of an offshore flexible direct current transmission project is characterized in that: the heat exchanger comprises a seawater circulation module, a fresh water circulation module and a heating equipment circulating cooling module, wherein a plurality of heat exchangers I (3) used for heat exchange between the seawater circulation module and the fresh water circulation module are arranged between the seawater circulation module and the fresh water circulation module, and a plurality of heat exchangers II (7) used for heat exchange between the fresh water circulation module and the heating equipment circulating cooling module are arranged between the fresh water circulation module and the heating equipment circulating cooling module.
2. The utility cooling system for an offshore flexible direct current transmission engineering converter station according to claim 1, characterized in that: the seawater circulation module is provided with a seawater pump set (1), a water suction port of the seawater pump set (1) is positioned below the sea level, a water outlet of the seawater pump set (1) is communicated with a cold side input end of the heat exchanger I (3) through a seawater filter (2), and a cold side output end of the heat exchanger I (3) is connected into the sea through a water outlet pipe.
3. The utility cooling system for an offshore flexible direct current transmission engineering converter station according to claim 1, characterized in that: the fresh water circulation module is provided with a fresh water pipeline I which is communicated with a hot side output end of the heat exchanger I (3) and a cold side input end of the heat exchanger II (7), and a fresh water pipeline II which is communicated with a cold side output end of the heat exchanger II (7) and a hot side input end of the heat exchanger I (3), wherein a centrifugal pump set (6) is arranged on the fresh water pipeline I.
4. The utility cooling system for an offshore flexible direct current transmission engineering converter station according to claim 3, characterized in that: and the fresh water pipeline I is connected with a fresh water supplementing and pressure stabilizing device (5).
5. The utility cooling system for an offshore flexible direct current transmission engineering converter station according to claim 1, characterized in that: the air conditioner condensing heat exchanger (4) is connected with the seawater circulating module to take seawater as a cold source; the air conditioner condensing heat exchanger (4) is connected with the heat-generating equipment circulating cooling module to cool heat dissipated to air by the electrical equipment as a heat source.
6. The utility cooling system for an offshore flexible direct current transmission engineering converter station according to claim 2, characterized in that: the seawater circulation module also comprises a marine organism prevention device (8).
7. The utility cooling system for an offshore flexible direct current transmission engineering converter station according to claim 6, characterized in that: the marine organism prevention device (8) adopts a sodium hypochlorite generator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021695863.2U CN212344356U (en) | 2020-08-14 | 2020-08-14 | Public cooling system for converter station of offshore flexible direct current transmission project |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021695863.2U CN212344356U (en) | 2020-08-14 | 2020-08-14 | Public cooling system for converter station of offshore flexible direct current transmission project |
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| CN212344356U true CN212344356U (en) | 2021-01-12 |
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| CN202021695863.2U Active CN212344356U (en) | 2020-08-14 | 2020-08-14 | Public cooling system for converter station of offshore flexible direct current transmission project |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114017859A (en) * | 2021-06-17 | 2022-02-08 | 广州高澜节能技术股份有限公司 | Multi-circulation cooling system adopting seawater for cooling |
-
2020
- 2020-08-14 CN CN202021695863.2U patent/CN212344356U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114017859A (en) * | 2021-06-17 | 2022-02-08 | 广州高澜节能技术股份有限公司 | Multi-circulation cooling system adopting seawater for cooling |
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