CN110719720A - Offshore platform flexible direct-current converter valve external cooling system adopting seawater cooling - Google Patents
Offshore platform flexible direct-current converter valve external cooling system adopting seawater cooling Download PDFInfo
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- CN110719720A CN110719720A CN201911009412.0A CN201911009412A CN110719720A CN 110719720 A CN110719720 A CN 110719720A CN 201911009412 A CN201911009412 A CN 201911009412A CN 110719720 A CN110719720 A CN 110719720A
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/20218—Modifications to facilitate cooling, ventilating, or heating using a liquid coolant without phase change in electronic enclosures
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/003—Constructional details, e.g. physical layout, assembly, wiring or busbar connections
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/20218—Modifications to facilitate cooling, ventilating, or heating using a liquid coolant without phase change in electronic enclosures
- H05K7/20263—Heat dissipaters releasing heat from coolant
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/20218—Modifications to facilitate cooling, ventilating, or heating using a liquid coolant without phase change in electronic enclosures
- H05K7/20272—Accessories for moving fluid, for expanding fluid, for connecting fluid conduits, for distributing fluid, for removing gas or for preventing leakage, e.g. pumps, tanks or manifolds
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Abstract
The invention discloses an offshore platform flexible direct current converter valve external cooling system adopting seawater cooling, which comprises: the main circulating cooling loop adopts deionized water as a circulating medium, is connected with the flexible direct-current converter valve and is used for circularly cooling the flexible direct-current converter valve; the intermediate circulation cooling loop is connected to the main circulation cooling loop, adopts fresh water as a circulation medium and is used for carrying out circulation heat exchange on the deionized water in the main circulation cooling loop so as to reduce the temperature of the deionized water; the secondary circulation cooling loop is connected to the intermediate circulation cooling loop, adopts seawater as a circulation medium and is used for carrying out circulation heat exchange on the fresh water in the intermediate circulation cooling loop so as to reduce the temperature of the fresh water; therefore, the technical problems that the seawater corrosion strength is high, more marine organisms exist, the power electronic device in the flexible direct current converter valve cannot be cooled, and the use cost is relatively high are solved.
Description
Technical Field
The invention relates to the technical field of external cooling systems, in particular to an external cooling system of a flexible direct-current converter valve of an offshore platform, which is cooled by seawater.
Background
The offshore wind power has the characteristics of abundant resources, high power generation utilization time, no land occupation and suitability for large-scale development; china is a big ocean country, has 300-ten thousand square kilometers of sea area and 18000 kilometers of sea shore line, and with the development of deep sea wind power technology, more offshore wind energy resources can be utilized; the flexible direct-current power transmission has the advantages of small occupied area, compact structure, modular structure, easiness in construction, small environmental influence, flexibility in control, no limitation of transmission distance and the like, and has obvious advantages in the aspect of offshore wind farm access;
in the flexible direct current transmission technology, the adopted converter element is a bidirectional controllable power electronic device which can be controlled to be switched on and switched off, and the converter element is typically an Insulated Gate Bipolar Transistor (IGBT), and because the device can generate huge heat in the operation process of the flexible direct current converter valve, a cooling system is required to dissipate heat of the flexible direct current converter valve in order to ensure the normal operation of the flexible direct current converter valve;
the conventional cooling system of the flexible direct current converter valve generally adopts deionized water, has the defects of large water supplement amount and the like, and the deionized water resource of the offshore platform is extremely valuable, so that the manufacturing cost of the cooling system is greatly increased if fresh water is adopted for cooling; however, due to the characteristics of high seawater corrosion strength, more marine organisms and the like, seawater cannot be directly introduced into the flexible direct current converter valve, and the special advantages of seawater cooling can be exerted to the maximum extent only by solving the corresponding technical difficulties.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide the external cooling system for the flexible direct current converter valve of the offshore platform, which is cooled by adopting seawater, so as to solve the technical problems that the seawater corrosion strength is high, more marine organisms exist, the external cooling system cannot be used for cooling power electronic devices in the flexible direct current converter valve, and the use cost is relatively high in the prior art.
The technical scheme for realizing the purpose of the invention is as follows: an offshore platform flexible DC converter valve external cooling system using seawater cooling, comprising:
the main circulating cooling loop adopts deionized water as a circulating medium, is connected with the flexible direct-current converter valve and is used for circularly cooling the flexible direct-current converter valve;
the intermediate circulation cooling loop is connected to the main circulation cooling loop, adopts fresh water as a circulation medium and is used for carrying out circulation heat exchange on the deionized water in the main circulation cooling loop so as to reduce the temperature of the deionized water;
and the secondary circulation cooling loop is connected to the intermediate circulation cooling loop, adopts seawater as a circulation medium and is used for carrying out circulation heat exchange on the fresh water in the intermediate circulation cooling loop so as to reduce the temperature of the fresh water.
Further: the main circulation cooling circuit includes: the first circulation loop is connected to the flexible direct current converter valve and used for circularly cooling the flexible direct current converter valve;
the first purification branch is connected to the first circulation loop and used for purifying the deionized water;
the first water replenishing branch is connected to the first purification branch and used for replenishing deionized water;
wherein the first circulation loop comprises: the two first circulating pumps are connected to a first pipeline, and inlets of the first circulating pumps are connected with the flexible direct-current converter valves through the first pipeline; the inlet of the first filter is connected with the outlet of the first circulating pump through the second pipeline, and the outlet of the first filter is connected with the flexible direct-current converter valve through a third pipeline;
the first purification branch comprises: two deionized resin tanks connected to a fourth pipeline, and the inlet of the deionized resin tank is connected to the third pipeline through the fourth pipeline; the two nitrogen pressure stabilizing tanks are sequentially connected to a fifth pipeline and are connected with the outlet of the deionized resin tank and the first pipeline through the fifth pipeline; the first nitrogen bottle is connected to one of the nitrogen pressure stabilizing tanks, and the two nitrogen pressure stabilizing tanks are also connected through an intermediate communication pipeline;
the first water replenishing branch comprises: the first water replenishing pump is used for sucking deionized water; the first water storage tank is connected to the outlet of the first water replenishing pump through a sixth pipeline; and the second water replenishing pump is connected to the outlet of the first water storage tank through a seventh pipeline and is connected with the fourth pipeline through the seventh pipeline.
Further: the intermediate circulation cooling circuit includes: an inlet and an outlet on one side of the first plate heat exchanger are connected to the second pipeline and used for exchanging heat between the fresh water in the intermediate circulation cooling loop and the deionized water in the main circulation cooling loop;
the inlet of the second circulating pump is connected with the outlet of the other side of the first plate heat exchanger through an eighth pipeline, and the outlet of the second circulating pump is connected with the inlet of the other side of the first plate heat exchanger through a ninth pipeline to form a fresh water circulating loop;
the second water replenishing branch is connected to the eighth pipeline;
wherein, the second moisturizing branch road includes: the third water replenishing pump is used for pumping fresh water; the fresh water pressure stabilizing tank is connected to the outlet of the third water replenishing pump through a tenth pipeline and is connected with the eighth pipeline; and the second nitrogen bottle is connected to the fresh water pressure stabilizing tank.
Further: the secondary circulation cooling circuit includes: an inlet and an outlet at one side of the second plate heat exchanger are connected to the ninth pipeline and are used for exchanging heat between the fresh water in the intermediate circulation cooling loop and the seawater in the secondary circulation cooling loop;
the outlet of the seawater pump is connected to the inlet at the other side of the second plate heat exchanger through an eleventh pipeline;
a second filter connected to the eleventh line;
and the twelfth pipeline is connected to the outlet on the other side of the second plate heat exchanger and discharges the seawater subjected to heat exchange into the sea.
Further: further comprising: and the sodium hypochlorite generator is connected to the inlet of the seawater pump and is used for sterilization and disinfection.
By adopting the technical scheme, the invention has the following beneficial effects: compared with the related technology, the offshore platform flexible direct-current converter valve external cooling system adopting seawater cooling is provided with a main circulating cooling loop, an intermediate circulating cooling loop and a secondary circulating cooling loop; the main circulating cooling loop is directly connected with the flexible direct current converter valve and can cool the power electronic devices in the flexible direct current converter valve; the intermediate circulation cooling loop can perform heat exchange and cooling on the main circulation cooling loop, and can play a role in blocking and protecting, so that once seawater leaks, the main circulation cooling loop is prevented from being corroded when the seawater is directly contacted with the main circulation cooling loop; the secondary circulation cooling loop can directly utilize seawater to carry out heat exchange and cooling on the intermediate circulation cooling loop, so that the cooling effect of the main circulation cooling loop is favorably ensured, the seawater can be fully utilized, the consumption of fresh water is relatively reduced, and the use cost is reduced; therefore, the technical problems that the seawater corrosion strength is high, more marine organisms exist at the same time, the power electronic device in the flexible direct current converter valve cannot be cooled, and the use cost is relatively high are solved, the seawater can be utilized, the temperature in a cooling system is reduced, the use amount of fresh water is reduced, the use cost is reduced, and the seawater-cooling type direct current converter valve is beneficial to wide popularization.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment of the present invention;
FIG. 2 is a schematic diagram of the main circulation cooling circuit in an embodiment of the present invention;
FIG. 3 is a schematic diagram of an intermediate circulation cooling circuit in an embodiment of the present invention;
FIG. 4 is a schematic diagram of a secondary cooling loop in an embodiment of the present invention;
in the figure: 10. a main circulation cooling loop, 11, a first circulation loop, 111, a first circulation pump, 112, a first filter, 12, a first purification branch, 121, a deionized resin tank, 122, a nitrogen pressure stabilizing tank, 123, a first nitrogen gas cylinder, 13, a first water replenishing branch, 131, a first water replenishing pump, 132, a first water storage tank, 133, a second water replenishing pump, 20, an intermediate circulation cooling loop, 21, a first plate heat exchanger, 22, a second circulation pump, 23, a second water replenishing branch, 231, a third water replenishing pump, 232, a fresh water pressure stabilizing tank, 233, a second nitrogen gas cylinder, 30, a secondary circulation cooling loop, 31, a second plate heat exchanger, 32, a sea water pump, 33, a second filter, 34, a sodium hypochlorite generator, 40, a flexible direct current converter valve, 51, a first pipeline, 52, a second pipeline, 53, a third pipeline, 54, a fourth pipeline, 55, a fifth pipeline, 56. sixth line, 57 seventh line, 58 eighth line, 59 ninth line, 510 tenth line, 511 eleventh line, 512 twelfth line.
Detailed Description
In order that the present invention may be more readily and clearly understood, there shall now be described in detail the present invention with reference to the following examples taken in conjunction with the accompanying drawings;
the invention relates to an offshore platform flexible direct current converter valve external cooling system adopting seawater cooling, which solves the technical problems that the seawater corrosion strength is high, more marine organisms exist at the same time, the system cannot be used for cooling power electronic devices in a flexible direct current converter valve, and the use cost is relatively high in the related technology, achieves the positive effects of utilizing seawater, reducing the temperature in a cooling system, reducing the use amount of fresh water and reducing the use cost, and has the following general idea:
the first embodiment is as follows:
as shown in fig. 1, 2, 3, 4; an offshore platform flexible DC converter valve external cooling system using seawater cooling, comprising:
the main circulating cooling loop 10 adopts deionized water as a circulating medium, is connected with the flexible direct current converter valve 40, and is used for circularly cooling the flexible direct current converter valve 40;
the intermediate circulation cooling loop 20 is connected to the main circulation cooling loop 10, adopts fresh water as a circulation medium, and is used for performing circulation heat exchange on the deionized water in the main circulation cooling loop 10 to reduce the temperature of the deionized water;
the secondary circulation cooling loop 30 is connected to the intermediate circulation cooling loop 20, adopts seawater as a circulation medium, and is used for performing circulation heat exchange on the fresh water in the intermediate circulation cooling loop 20 to reduce the temperature of the fresh water;
specifically, in practice, the main circulation cooling circuit 10, the intermediate circulation cooling circuit 20, and the sub circulation cooling circuit 30 are provided; the main circulation cooling loop 10 is directly connected with the flexible direct current converter valve 40 and can cool the power electronic devices in the flexible direct current converter valve 40; the intermediate circulation cooling loop 20 can perform heat exchange and temperature reduction on the main circulation cooling loop 10, and can also play a role in blocking and protecting, so that when seawater directly contacts the main circulation cooling loop 10, once the seawater leaks, the main circulation cooling loop 10 is corroded, and the flexible direct current converter valve 40 is corroded; the secondary circulation cooling loop 30 can directly utilize seawater to perform heat exchange and cooling on the intermediate circulation cooling loop 20, so that the cooling effect of the main circulation cooling loop 10 is ensured, the seawater can be fully utilized, the consumption of fresh water is relatively reduced, and the use cost is reduced; the technical problems that the seawater corrosion strength is high, more marine organisms exist at the same time, the seawater corrosion resistance is not used for cooling power electronic devices in the flexible direct current converter valve 40, and the use cost is relatively high are solved, and the technical effects that the seawater can be utilized, the temperature in a cooling system is reduced, the use amount of fresh water is reduced, and the use cost is reduced are achieved;
the following is a detailed description of the respective constituent elements and the connection relationship:
specifically, as shown in fig. 1 and 2, the main circulation cooling circuit 10 includes: the first circulation loop 11 is connected to the flexible direct current converter valve 40 and used for circularly cooling the flexible direct current converter valve 40;
the first purification branch 12 is connected to the first circulation loop 11 and is used for purifying deionized water;
the first water replenishing branch 13 is connected to the first purifying branch 12 and is used for replenishing deionized water;
wherein the first circulation loop 11 comprises: two first circulation pumps 111 connected to the first pipeline 51, and an inlet of the first circulation pump 111 is connected to the flexible dc converter valve 40 through the first pipeline 51; two first filters 112 connected to the second pipeline 52, wherein the inlet of the first filter 112 is connected to the outlet of the first circulation pump 111 through the second pipeline 52, and the outlet of the first filter 112 is connected to the flexible dc converter valve 40 through the third pipeline 53;
the first purification branch 12 comprises: two deionized resin tanks 121 connected to the fourth piping 54, and inlets of the deionized resin tanks 121 connected to the third piping 53 through the fourth piping 54; two nitrogen surge tanks 122 connected in sequence to a fifth pipe 55, connected to the outlet of the deionizing resin tank 121 through the fifth pipe 55, and connected to the first pipe 51; the first nitrogen cylinder 123 is connected to one of the nitrogen pressure stabilizing tanks 122, and the two nitrogen pressure stabilizing tanks 122 are also connected through a middle communicating pipeline;
the first refill branch 13 includes: a first water replenishing pump 131 for sucking deionized water; a first water storage tank 132 connected to an outlet of the first water replenishing pump 131 through a sixth pipeline 56; and a second water replenishing pump 133 connected to an outlet of the first water storage tank 132 through a seventh pipe 57, and connected to the fourth pipe 54 through the seventh pipe 57;
in implementation, the first circulation pump 111 is a horizontal end-suction centrifugal pump, which is used for sucking and conveying deionized water, so that the deionized water can circulate in the main circulation cooling loop 10, and one is used and the other is standby;
the number of the first filters 112 is two, one is used and one is spare, and the existing technology of a filtering device for preventing water hammer impact, such as Chinese patent with the application number of CN201520528990.6, can be adopted, and the filtering device is connected with the second pipeline 52 through a water inlet pipe and connected with a water collecting output pipe and the third pipeline 53, so that the filtering of deionized water is realized;
the number of the deionized resin tanks 121 is two, one is used and one is spare, the prior art of a multilayer deionized resin tank with the patent subject name of CN201821698983.0 can be adopted, the deionized water in the main circulation cooling loop 10 is purified by connecting the fourth pipeline 54 with the inlet of the deionized resin tank 121 and connecting the fifth pipeline 55 with the outlet of the deionized resin tank 121, so that pure water with lower conductivity is obtained, the cooling effect is improved, and the probability of damaging the flexible direct current converter valve 40 is reduced;
the number of the nitrogen pressure stabilizing tanks 122 is 2, one is used and one is spare, and the prior art of a high-level nitrogen pressure stabilizing system for a water cooling system of a high-voltage direct-current transmission converter valve can be adopted, wherein the Chinese patent application number is CN201220417046. X; the first nitrogen cylinder 123 adopts the structure in the prior art, and is used for stabilizing the pressure of the main circulation cooling loop 10 under the combined action of the first nitrogen cylinder and the nitrogen pressure stabilizing tank 122, so that the stability is better; those skilled in the art, having reviewed the disclosure of the present invention, will be able to directly and unambiguously know how to set up the nitrogen surge tank 122 and the first nitrogen cylinder 123 without any creative effort;
the first water replenishing pump 131 is a vertical centrifugal pump, and is used for pumping and delivering deionized water so that the deionized water can be replenished into the first water storage tank 132;
the first water storage tank 132 is a vertical water storage tank for temporarily storing deionized water;
the second water replenishing pump 133 is a vertical centrifugal pump, and is configured to pump and deliver deionized water, so that the deionized water can be replenished into the main circulation cooling circuit 10, and the deionized water in the main circulation cooling circuit 10 is prevented from being cut off;
the deionized water is enabled to circulate in the main circulation cooling loop 10 through the first circulation pump 111, cooling the power electronics in the flexible direct current converter valve 40;
specifically, as shown in fig. 1 and 3, the intermediate circulation cooling circuit 20 includes: an inlet and an outlet on one side of the first plate heat exchanger 21 are connected to the second pipeline 52, and are used for exchanging heat between the fresh water in the intermediate circulation cooling loop 20 and the deionized water in the main circulation cooling loop 10;
two second circulation pumps 22, wherein inlets of the second circulation pumps 22 are connected with outlets on the other side of the first plate heat exchanger 21 through eighth pipelines 58, and outlets of the second circulation pumps 22 are connected with inlets on the other side of the first plate heat exchanger 21 through ninth pipelines 59, so as to form a fresh water circulation loop;
the second water replenishing branch 23 is connected to the eighth pipeline 58;
wherein, the second water replenishing branch 23 includes: a third make-up water pump 231 for pumping fresh water; a fresh water surge tank 232 connected to an outlet of the third water replenishing pump 231 through a tenth pipe 510, and connected to the eighth pipe 58; and a second nitrogen bottle 233 connected to the fresh water surge tank 232;
in implementation, the number of the first plate heat exchangers 21 is two, one for one, and the other for one, such as chinese patent application No. cn201610462616.x, the subject name of which is the heat exchange plate for the plate heat exchanger and the prior art of the plate heat exchanger, so that the deionized water in the main circulation cooling loop 10 and the fresh water in the intermediate circulation cooling loop 20 exchange heat by convection, thereby ensuring the heat exchange effect;
the second circulating pump 22 is a horizontal end-suction centrifugal pump and is used for pumping and conveying fresh water, so that the fresh water can circulate in the intermediate circulation cooling loop 20 and can be used for standby;
through the second circulating pump 22, fresh water can circulate in the intermediate circulation cooling loop 20 to exchange heat and cool deionized water in the main circulation cooling loop 10, so that the deionized water in the main circulation cooling loop 10 can better cool power electronic devices in the flexible direct current converter valve 40, and can also play a role in blocking and protecting, so that when seawater is directly contacted with the main circulation cooling loop 10, once the seawater leaks, the main circulation cooling loop 10 can be corroded, and when the seawater is serious, the flexible direct current converter valve 40 can be corroded;
the third water replenishing pump 231 adopts a vertical centrifugal pump for pumping and conveying fresh water, so that the fresh water can be replenished into the fresh water surge tank 232;
the fresh water pressure stabilizing tank 232 and the second nitrogen bottle 233 act together to realize water supplement and pressure stabilization for the intermediate circulation cooling loop 20, and the stability is better, and the prior art of the high-level nitrogen pressure stabilizing system for the high-voltage direct current transmission converter valve water cooling system can be adopted, for example, the Chinese patent application number is CN201220417046. X; those skilled in the art, having the benefit of this disclosure, will be able to directly and unambiguously know how to arrange the fresh water surge tank 232 and the second nitrogen cylinder 233 without any inventive effort;
specifically, as shown in fig. 1 and 4, the secondary circulation cooling circuit 30 includes: an inlet and an outlet on one side of the second plate heat exchanger 31 are connected to the ninth pipeline 59, and are used for exchanging heat between the fresh water in the intermediate circulation cooling loop 20 and the seawater in the secondary circulation cooling loop 30;
a seawater pump 32 submerged in the seawater, wherein an outlet of the seawater pump 32 is connected to an inlet on the other side of the second plate heat exchanger 31 through an eleventh pipeline 511;
the number of the second filters 33 is two, one for one, and the other for one, which can adopt the prior art of the Chinese patent application number of CN201320803846.X with the subject name of a seawater automatic filter device, is connected to the eleventh pipeline 511, so as to realize the purpose of primarily filtering the impurities in the seawater;
a sodium hypochlorite generator 34 connected to the inlet of the seawater pump for sterilization;
a twelfth pipeline 512 connected to the outlet on the other side of the second plate heat exchanger 31 for introducing the heat-exchanged seawater into the sea;
in implementation, the number of the second plate heat exchangers 31 is two, one is used and one is spare, and for example, the chinese patent application No. cn201610462616.x, the subject name of which is the heat exchange plate for the plate heat exchanger and the prior art of the plate heat exchanger, can be adopted, so that the fresh water in the intermediate circulation cooling loop 20 and the seawater in the secondary circulation cooling loop 30 exchange heat in a convection manner, thereby ensuring the heat exchange effect; the material is titanium alloy;
the seawater pump 32 adopts a submersible axial-flow pump, is made of duplex stainless steel, and is used for pumping and conveying seawater so that the seawater circulates in the secondary circulation cooling loop 30;
the second filter 33 is in the form of a multi-filter column and is made of duplex stainless steel;
the sodium hypochlorite generator 34 adopts a common structure in the prior art, such as GB/T12176, and by inserting electrodes into saline seawater, the seawater between the two electrodes is electrolyzed to generate sodium hypochlorite solution under a certain voltage, so as to achieve the purpose of disinfecting the water body, and after seeing the disclosure of the invention, a person skilled in the art can directly and unambiguously know how to arrange the sodium hypochlorite generator 34 without creative labor;
the seawater is circulated in the secondary circulation cooling loop 30 through the seawater pump 32, the fresh water in the intermediate circulation cooling loop 20 can be subjected to heat exchange and cooling, the seawater can be recycled, and the use is very convenient;
specifically, as shown in fig. 1, 2, 3 and 4, the flexible dc converter valve 40 is a common structure in the prior art, and is not cumbersome;
the first pipeline 51, the second pipeline 52, the third pipeline 53, the fourth pipeline 54, the fifth pipeline 55, the sixth pipeline 56, the seventh pipeline 57, the eighth pipeline 58, the ninth pipeline 59, the tenth pipeline 510, the eleventh pipeline 511 and the twelfth pipeline 512 are all common structures in the prior art, and are assembled and welded through a straight pipe, a bent pipe and a flange, and then are combined, and each pipeline needs to be provided with at least one valve;
the working principle of the invention is as follows: in implementation, a main circulation cooling loop 10, an intermediate circulation cooling loop 20 and a secondary circulation cooling loop 30 are arranged; the main circulation cooling loop 10 is directly connected with the flexible direct current converter valve 40 and can cool the power electronic devices in the flexible direct current converter valve 40; the intermediate circulation cooling loop 20 can perform heat exchange and temperature reduction on the main circulation cooling loop 10, and can also play a role in blocking and protecting, so that when seawater directly contacts the main circulation cooling loop 10, once the seawater leaks, the main circulation cooling loop 10 is corroded, and the flexible direct current converter valve 40 is corroded; the secondary circulation cooling loop 30 can directly utilize seawater to perform heat exchange and cooling on the intermediate circulation cooling loop 20, so that the cooling effect of the main circulation cooling loop 10 is ensured, the seawater can be fully utilized, the consumption of fresh water is relatively reduced, and the use cost is reduced; therefore, the technical problems that the seawater corrosion strength is high, more marine organisms exist at the same time, the flexible direct current converter valve 40 cannot be used for cooling power electronic devices, and the use cost is relatively high are solved, the purposes that the seawater can be utilized, the temperature in a cooling system is reduced, the use amount of fresh water is reduced, and the technical effect of the use cost is reduced are achieved, the intermediate circulation cooling loop 20 plays a role in blocking, the flexible direct current converter valve 40 can be protected, once the seawater leaks when the seawater is directly contacted with the main circulation cooling loop 10, the main circulation cooling loop 10 can be corroded, the flexible direct current converter valve 40 is corroded, and the unexpected technical effect is generated.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", "front", "rear", and the like indicate orientations or positional relationships based on the positional relationships illustrated in the drawings, and are only for convenience in describing the present invention or simplifying the description, but do not indicate that a specific orientation must be provided; the operation procedures described in the embodiments are not absolute use steps, and may be adjusted accordingly when actually used.
Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs; the use of "first," "second," and the like in the description and in the claims is not intended to identify any order, quantity, or importance, but rather is used to distinguish one element from another, and similarly, the use of "a" or "an" and the like do not necessarily indicate a limitation of quantity, but rather indicate the presence of at least one of the elements, as determined by the context of the embodiment.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (5)
1. The utility model provides an adopt sea water refrigerated marine platform flexible direct current converter valve external cooling system which characterized in that includes:
the main circulating cooling loop (10) adopts deionized water as a circulating medium, is connected with the flexible direct-current converter valve (40) and is used for circularly cooling the flexible direct-current converter valve (40);
the intermediate circulation cooling loop (20) is connected to the main circulation cooling loop (10), adopts fresh water as a circulation medium and is used for performing circulation heat exchange on the deionized water in the main circulation cooling loop (10) to reduce the temperature of the deionized water;
and the secondary circulation cooling loop (30) is connected to the intermediate circulation cooling loop (20), adopts seawater as a circulation medium, and is used for performing circulation heat exchange on the fresh water in the intermediate circulation cooling loop (20) to reduce the temperature of the fresh water.
2. The marine platform flexible direct current converter valve external cooling system using seawater cooling according to claim 1, wherein: the main circulation cooling circuit (10) comprises: the first circulation loop (11) is connected to the flexible direct current converter valve (40) and is used for circularly cooling the flexible direct current converter valve (40);
the first purification branch (12) is connected to the first circulation loop (11) and is used for purifying deionized water;
the first water replenishing branch (13) is connected to the first purification branch (12) and is used for replenishing deionized water;
the first circulation loop (11) comprises: two first circulation pumps (111) connected to a first pipeline (51), and an inlet of the first circulation pump (111) is connected to the flexible direct current converter valve (40) through the first pipeline (51); and two first filters (112) connected to a second pipe (52), and the inlet of the first filter (112) is connected to the outlet of the first circulation pump (111) through the second pipe (52), and the outlet of the first filter (112) is connected to the flexible direct current converter valve (40) through a third pipe (53);
the first purification branch (12) comprises: two deionizing resin tanks (121) connected to a fourth piping (54), and an inlet of the deionizing resin tank (121) is connected to the third piping (53) through the fourth piping (54); two nitrogen pressure-stabilizing tanks (122) which are sequentially connected to a fifth pipeline (55) and connected with the outlet of the deionized resin tank (121) and the first pipeline (51) through the fifth pipeline (55); the first nitrogen bottle (123) is connected to one of the nitrogen pressure stabilizing tanks (122), and the two nitrogen pressure stabilizing tanks (122) are also connected through a middle communicating pipeline;
the first water replenishing branch (13) comprises: a first water replenishment pump (131) for suctioning deionized water; the first water storage tank (132) is connected to the outlet of the first water replenishing pump (131) through a sixth pipeline (56); and a second water replenishing pump (133) connected to an outlet of the first water storage tank (132) through a seventh pipe (57) and connected to the fourth pipe (54) through the seventh pipe (57).
3. The marine platform flexible direct current converter valve external cooling system using seawater cooling according to claim 2, wherein: the intermediate circulation cooling circuit (20) comprises: an inlet and an outlet at one side of the first plate heat exchanger (21) are connected to the second pipeline (52) and are used for exchanging heat between the fresh water in the intermediate circulation cooling loop (20) and the deionized water in the main circulation cooling loop (10);
two second circulating pumps (22), wherein inlets of the second circulating pumps (22) are connected with outlets on the other side of the first plate heat exchanger (21) through eighth pipelines (58), and outlets of the second circulating pumps (22) are connected with inlets on the other side of the first plate heat exchanger (21) through ninth pipelines (59) to form a fresh water circulating loop;
and a second water replenishing branch (23) connected to the eighth pipeline (58);
the second water replenishing branch (23) comprises: a third water replenishing pump (231) for pumping fresh water; a fresh water surge tank (232) connected to an outlet of the third water replenishing pump (231) through a tenth pipe (510) and connected to the eighth pipe (58); and the second nitrogen bottle (233) is connected to the fresh water pressure stabilizing tank (232).
4. The offshore platform flexible direct current converter valve external cooling system using seawater cooling according to claim 3, wherein: the secondary circulation cooling circuit (30) comprises: an inlet and an outlet at one side of the second plate heat exchanger (31) are connected to the ninth pipeline (59) and are used for exchanging heat between the fresh water in the intermediate circulation cooling loop (20) and the seawater in the secondary circulation cooling loop (30);
the seawater pump (32) is submerged in seawater, and the outlet of the seawater pump (32) is connected to the inlet of the other side of the second plate type heat exchanger (31) through an eleventh pipeline (511);
a second filter (33) connected to the eleventh line (511);
and a twelfth pipeline (512) which is connected to the outlet at the other side of the second plate heat exchanger (31) and discharges the seawater after heat exchange into the sea.
5. The offshore platform flexible direct current converter valve external cooling system using seawater cooling according to claim 4, wherein: further comprising: and the sodium hypochlorite generator (34) is connected to the inlet of the seawater pump (32) and is used for sterilization.
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| CN201911009412.0A CN110719720A (en) | 2019-10-23 | 2019-10-23 | Offshore platform flexible direct-current converter valve external cooling system adopting seawater cooling |
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| CN201911009412.0A CN110719720A (en) | 2019-10-23 | 2019-10-23 | Offshore platform flexible direct-current converter valve external cooling system adopting seawater cooling |
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| 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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Application publication date: 20200121 |