CN212786392U - Micro-positive pressure cooling system for converter station of offshore flexible direct current transmission project - Google Patents
Micro-positive pressure cooling system for converter station of offshore flexible direct current transmission project Download PDFInfo
- Publication number
- CN212786392U CN212786392U CN202021697250.2U CN202021697250U CN212786392U CN 212786392 U CN212786392 U CN 212786392U CN 202021697250 U CN202021697250 U CN 202021697250U CN 212786392 U CN212786392 U CN 212786392U
- Authority
- CN
- China
- Prior art keywords
- pressure
- fresh water
- module
- seawater
- heat exchanger
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Abstract
The utility model relates to a pressure-fired cooling system for marine flexible direct current transmission engineering convertor station. The heat exchanger I is arranged between the seawater circulation module and the fresh water circulation module, and the heat exchanger II is arranged between the fresh water circulation module and the heating equipment circulation cooling module; the fresh water circulating module is connected with a pressure instrument II for collecting fresh water operating pressure F2 in the fresh water circulating module, and the heating equipment circulating cooling module is connected with a pressure instrument III for collecting cooling liquid operating pressure F3 in the heating equipment circulating cooling module and a pressure pump II for increasing the cooling liquid operating pressure; the pressure instrument II, the pressure instrument III and the pressure pump II are all electrically connected with the control module, and the control module controls the action of the pressure pump II according to the fresh water operation pressure F2 and the cooling liquid operation pressure F3 obtained by the pressure instrument II and the pressure instrument III, so that F3 is more than F2. The utility model is suitable for a direct current transmission field.
Description
Technical Field
The utility model relates to a pressure-fired cooling system for marine flexible direct current transmission engineering convertor 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 heating 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, the conductivity of seawater is generally about 50000 mu s/cm, the conductivity of fresh water is about 5-20 mu s/cm, and the conductivity of a cold cooling medium of a converter valve is generally required to be less than 0.5 mu s/cm. 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. And, because the seawater has complex composition and strong corrosiveness, the seawater is not suitable for being directly used for cooling various equipment of the convertor station.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is: aiming at the existing problems, the micro-positive pressure cooling system for the converter station of the offshore flexible direct current transmission project is provided to ensure the normal operation of equipment.
The utility model adopts the technical proposal that: the utility model provides a pressure-fired cooling system for marine flexible direct current transmission engineering converter station which characterized in that: the heat exchanger I for heat exchange between the seawater circulation module and the fresh water circulation module is arranged between the seawater circulation module and the fresh water circulation module, and the heat exchanger II for heat exchange between the fresh water circulation module and the heating equipment circulation cooling module is arranged between the fresh water circulation module and the heating equipment circulation cooling module;
the heating equipment circulating cooling module is connected with a pressure instrument III for acquiring the operating pressure F3 of cooling liquid in the heating equipment circulating cooling module and a pressure pump II for increasing the operating pressure of the cooling liquid;
the pressure instrument II, the pressure instrument III and the pressure pump II are all electrically connected with the control module, and the control module controls the pressure pump II to act according to the fresh water operation pressure F2 and the cooling liquid operation pressure F3 obtained by the pressure instrument II and the pressure instrument III so as to ensure that F3 is greater than F2.
The seawater circulation module is connected with a pressure instrument I for collecting seawater operation pressure F1 in the seawater circulation module, and the fresh water circulation module is connected with a pressure pump I for increasing fresh water operation pressure;
the pressure instrument I and the pressure pump I are electrically connected with the control module, and the control module controls the action of the pressure pump I according to the seawater operating pressure F1 and the fresh water operating pressure F2 acquired by the pressure instrument I and the pressure instrument II so as to ensure that F2 is greater than F1.
F3 is 10-15% larger than F2; f2 is 10-15% larger than F1.
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 water delivery pipe connected with a seawater filter and the pressure instrument I, 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 the fresh water pipeline I is provided with a water pump I, a booster pump I and a pressure instrument II.
And a valve is connected to the fresh water pipeline I.
The heating equipment circulating cooling module is provided with a cooling liquid pipeline I which is communicated with the output end of the hot side of the heat exchanger II and the input end of the heating equipment radiator, and a cooling liquid pipeline II which is communicated with the output end of the heating equipment radiator and the input end of the hot side of the heat exchanger II, wherein the pressure instrument III is arranged on the cooling liquid pipeline I, and the water pump II and the booster pump II are arranged on the cooling liquid pipeline II.
The seawater circulation module also comprises a marine organism prevention device and a seawater filter.
The utility model has the advantages that: the utility model discloses a sea water circulation module and fresh water circulation module have utilized the heat transfer of sea water and fresh water, effectively cool off each equipment that generates heat of offshore platform. The utility model discloses the regional of well sea water flow is located outside refrigerated part, and only accounts for less partly to whole cooling system, and fresh water is great in the shared 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 utility model discloses control coolant liquid operating pressure F3 is greater than fresh water operating pressure F2, and fresh water operating pressure F2 is greater than sea water operating pressure F1, even pipeline or plate heat exchanger are corroded and take place the seepage, also can ensure in a period that the coolant of high conductivity can not the seepage get into the coolant of low conductivity in, has kept the safety of core equipment. Time is strived for early warning and overhauling of the equipment, and reliability of the system is improved.
Drawings
Fig. 1 is a schematic structural diagram of the embodiment.
In the figure: 1. a seawater pump set; 2. a marine growth prevention device; 3. a heat exchanger I; 5. a heat exchanger II; 6-1, a water pump I; 6-2, a water pump II; 7. a converter valve; 8. a transformer; 9. an air conditioner; 10-1, a pressure instrument I; 10-2, a pressure instrument II; 10-3, a pressure instrument III; 11-1, a pressure pump I; 11-2, a pressure pump II; 12. and (4) a valve.
Detailed Description
As shown in fig. 1, the embodiment is a micro-positive pressure cooling system for a converter station of an offshore flexible direct current transmission project, and the micro-positive pressure cooling system comprises a seawater circulation module, a fresh water circulation module and a heating equipment circulation cooling module, wherein a heat exchanger i is arranged between the seawater circulation module and the fresh water circulation module, and a heat exchanger ii is arranged 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 and a marine organism prevention device, a water suction port of the seawater pump set is located at a certain distance below the sea level, a water outlet of the seawater pump set is communicated with a cold side input end of a heat exchanger I through a water delivery pipe, a cold side output end of the heat exchanger I is connected into the sea through a water outlet pipe, and a pressure instrument I is arranged on the water delivery pipe.
Prevent marine life device in this embodiment adopts the sodium hypochlorite generator, and the sea water gets into prevents marine life device, and the device produces sodium hypochlorite through the electrolysis sea water, carries sea water pump package suction port department, guarantees that all pipeline sections of sea water circulating unit, parts do not receive the marine life influence.
The fresh water circulation module in the embodiment is provided with a fresh water pipeline I and a fresh water pipeline II, one end of the fresh water pipeline I is communicated with the hot side output end of the heat exchanger I, the other end of the fresh water pipeline I is communicated with the cold side input end of the heat exchanger II through a valve, and the fresh water pipeline I is provided with a water pump I, a pressure pump I and a pressure instrument II; 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.
The circulating cooling module of the heating equipment in the embodiment is provided with a cooling liquid pipeline I which is communicated with the output end of the heat side of the heat exchanger II and the input end of a radiator of the heating equipment (a transformer, a converter valve and an air conditioner), and a cooling liquid pipeline II which is communicated with the output end of the radiator of the heating equipment and the input end of the heat side of the heat exchanger II, wherein the cooling liquid pipeline I is provided with a pressure instrument III, and the cooling liquid pipeline II is provided with a water pump II and a booster.
In the embodiment, a pressure instrument I, a pressure pump I, a pressure instrument II, a valve, a pressure pump II, a pressure instrument III and the like are connected with a control module through circuits, the control module respectively obtains seawater operating pressure F1 in a seawater circulation module, fresh water operating pressure F2 in the fresh water circulation module and cooling liquid operating pressure F3 in a heating equipment circulating cooling module through the pressure instruments I, II and III, and by controlling the pressure pump I and the pressure pump II, the F2 is ensured to be 10-15% larger than F1, and the F3 is ensured to be 10-15% larger than F2. When the monitored pressure value is lower than the lower limit of the set value, starting a corresponding pressurizing pump to pressurize; and when the monitored pressure value is higher than the upper limit of the set value, the corresponding booster pump is stopped to ensure that the whole system is in a micro-positive pressure state.
The cooling method of this example is as follows:
carrying out first heat exchange on cooling liquid in the heating equipment circulating cooling module and cooled equipment to obtain high-temperature cooling liquid;
the high-temperature cooling liquid and the low-temperature fresh water of the fresh water circulation module perform secondary heat exchange, 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-mentioned embodiment is only used for explaining the utility model concept, and not to the limit of the utility model protection, and all utilize this concept to be right the utility model discloses carry out insubstantial change, all shall fall into the scope of protection of the utility model.
Claims (8)
1. The utility model provides a pressure-fired cooling system for marine flexible direct current transmission engineering converter station which characterized in that: the heat exchanger I (3) for heat exchange between the seawater circulation module and the fresh water circulation module is arranged between the seawater circulation module and the fresh water circulation module, and the heat exchanger II (5) for heat exchange between the fresh water circulation module and the heating equipment circulation cooling module is arranged between the fresh water circulation module and the heating equipment circulation cooling module;
the fresh water circulating module is connected with a pressure instrument II (10-2) used for collecting fresh water operating pressure F2 in the fresh water circulating module, and the heating equipment circulating cooling module is connected with a pressure instrument III (10-3) used for collecting cooling liquid operating pressure F3 in the heating equipment circulating cooling module and a booster pump II (11-2) used for increasing the cooling liquid operating pressure;
the pressure instrument II (10-2), the pressure instrument III (10-3) and the pressure pump II (11-2) are electrically connected with the control module, and the control module controls the pressure pump II (11-2) to act according to the fresh water operation pressure F2 and the cooling liquid operation pressure F3 obtained by the pressure instrument II (10-2) and the pressure instrument III (10-3) so as to ensure that F3 is greater than F2.
2. The micro-positive pressure cooling system for the converter station of the offshore flexible direct current transmission project according to claim 1, characterized in that: the seawater circulation module is connected with a pressure instrument I (10-1) used for collecting seawater operation pressure F1 in the seawater circulation module, and the fresh water circulation module is connected with a pressure pump I (11-1) used for increasing fresh water operation pressure;
the pressure instrument I (10-1) and the pressure pump I (11-1) are electrically connected with the control module, and the control module controls the pressure pump I (11-1) to act according to the seawater operating pressure F1 and the fresh water operating pressure F2 acquired by the pressure instrument I (10-1) and the pressure instrument II (10-2) so as to ensure that F2 is greater than F1.
3. The micro-positive pressure cooling system for the offshore flexible direct current transmission engineering converter station according to claim 2, characterized in that: f3 is 10-15% larger than F2; f2 is 10-15% larger than F1.
4. The micro-positive pressure cooling system for the offshore flexible direct current transmission engineering converter station according to claim 2 or 3, 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 water delivery pipe connected with a seawater filter and the pressure instrument I (10-1), and a cold side output end of the heat exchanger I (3) is connected into the sea through a water outlet pipe.
5. The micro-positive pressure cooling system for the offshore flexible direct current transmission engineering converter station according to claim 2 or 3, 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 (5), and a fresh water pipeline II which is communicated with a cold side output end of the heat exchanger II (5) and a hot side input end of the heat exchanger I (3), wherein the fresh water pipeline I is provided with a water pump I (6-1), a booster pump I (11-1) and a pressure instrument II (10-2).
6. The micro-positive pressure cooling system for the converter station of the offshore flexible direct current transmission project according to claim 5, characterized in that: and the fresh water pipeline I is connected with a valve (12).
7. The micro-positive pressure cooling system for the converter station of the offshore flexible direct current transmission project according to claim 1, characterized in that: the heating equipment circulating cooling module is provided with a cooling liquid pipeline I which is communicated with the heat side output end of the heat exchanger II (5) and the heat side input end of the heating equipment radiator, and a cooling liquid pipeline II which is communicated with the heat side output end of the heating equipment radiator and the heat side input end of the heat exchanger II (5), wherein the pressure instrument III (10-3) is arranged on the cooling liquid pipeline I, and a water pump II (6-2) and a booster pump II (11-2) are arranged on the cooling liquid pipeline II.
8. The micro-positive pressure cooling system for the converter station of the offshore flexible direct current transmission project according to claim 1, characterized in that: the seawater circulation module also comprises a marine organism prevention device (2) and a seawater filter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021697250.2U CN212786392U (en) | 2020-08-14 | 2020-08-14 | Micro-positive pressure cooling system for converter station of offshore flexible direct current transmission project |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021697250.2U CN212786392U (en) | 2020-08-14 | 2020-08-14 | Micro-positive pressure cooling system for converter station of offshore flexible direct current transmission project |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212786392U true CN212786392U (en) | 2021-03-23 |
Family
ID=75052579
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021697250.2U Active CN212786392U (en) | 2020-08-14 | 2020-08-14 | Micro-positive pressure cooling system for converter station of offshore flexible direct current transmission project |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212786392U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111867340A (en) * | 2020-08-14 | 2020-10-30 | 中国电建集团华东勘测设计研究院有限公司 | Micro-positive pressure cooling system for converter station of offshore flexible direct current transmission project |
-
2020
- 2020-08-14 CN CN202021697250.2U patent/CN212786392U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111867340A (en) * | 2020-08-14 | 2020-10-30 | 中国电建集团华东勘测设计研究院有限公司 | Micro-positive pressure cooling system for converter station of offshore flexible direct current transmission project |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203394709U (en) | Waste heat conversion system | |
| CN212344356U (en) | Public cooling system for converter station of offshore flexible direct current transmission project | |
| CN212786392U (en) | Micro-positive pressure cooling system for converter station of offshore flexible direct current transmission project | |
| CN101517795A (en) | Method and device for operating fuel cell used together with condenser | |
| CN203134898U (en) | Heat exchanging system of megawatt-grade redox flow battery | |
| CN201230256Y (en) | Cooling machine for wind power electricity generation current transformer | |
| CN202707412U (en) | Cooling water heat recovery preheating system for air compressor | |
| CN110886629A (en) | System and method for realizing thermoelectric decoupling by using photo-thermal | |
| CN116202128B (en) | Method for heating by utilizing compressed air energy storage compression heat waste heat | |
| CN111867340A (en) | Micro-positive pressure cooling system for converter station of offshore flexible direct current transmission project | |
| CN114381756B (en) | Hydrogen production device by water electrolysis | |
| CN112983575B (en) | High-flow steam extraction and heat supply steam turbine system | |
| CN204851350U (en) | Utilize living water heating system of power plant's exhaust steam waste heat | |
| CN206071749U (en) | A kind of marine generator waste heat cyclic utilization system | |
| CN111918534A (en) | Public cooling system for converter station of offshore flexible direct current transmission project | |
| CN209926904U (en) | Oxidation steam heat transfer system | |
| CN114060110A (en) | Bypass heating heat cascade utilization system and method capable of supplying black start power supply | |
| CN215675801U (en) | Heat pump unit with solar auxiliary heating function | |
| CN217952703U (en) | Air energy water heating equipment with low energy consumption | |
| CN214094443U (en) | High-efficient flash vessel exhaust steam recovery plant surely arranges based on energy multilevel utilization | |
| JP5297690B2 (en) | Heat utilization system | |
| CN220931094U (en) | Low-temperature waste heat power generation device | |
| CN211901170U (en) | Circulating structure of hydraulic motor and hydraulic station | |
| CN216110641U (en) | Unfreezing and antifreezing system for plateau water well | |
| CN214664352U (en) | High-flow steam extraction and heat supply system of steam turbine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |