CN104242556A - Air cooler for nuclear power steam turbine generators - Google Patents
Air cooler for nuclear power steam turbine generators Download PDFInfo
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- CN104242556A CN104242556A CN201410492204.1A CN201410492204A CN104242556A CN 104242556 A CN104242556 A CN 104242556A CN 201410492204 A CN201410492204 A CN 201410492204A CN 104242556 A CN104242556 A CN 104242556A
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- tube sheet
- water
- air cooler
- water outlet
- nuclear power
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Abstract
The invention discloses an air cooler for nuclear power steam turbine generators. The air cooler comprises a shell, a water inlet pipe plate and a water outlet pipe plate are respectively fixed at two ends of the shell, and a plurality of cooling fins are fixed on cooling pipes; the air cooler further comprises a cathodic current protection unit which comprises a direct-current power supply and an adjustable resistor, the negative electrode of the direct-current power supply is connected with the cooling fins, cooling pipe sleeves among the cooling fins are contacted with one another to be electrically connected, a positive electrode of the direct-current power supply is connected to the water inlet pipe plate or the water outlet pipe plate, the cooling fins close to the water inlet pipe plate or the water outlet pipe plate are contacted with the water inlet pipe plate or the water outlet pipe plate to form a circuit, and the adjustable resistor is serially connected in the circuit. By the arrangement, the air cooler can adapt to cool nuclear power steam turbine generator sets in marine atmospheric environment, the air cooler is high in corrosion resistance, capable of reducing electrochemical corrosion and long in service life.
Description
Technical field
The present invention relates to a kind of air cooler, refer to a kind of nuclear power turbo generator air cooler especially.
Background technology
Day by day exhausted along with ore dyestuffs such as coal, oil, natural gases, wind energy, solar energy, underground heat equal energy source have that total amount is limited, skewness and the problem such as energy density is low, nuclear power becomes new forms of energy first-selected in China " 12 " planning.Aerial cooler is the key equipment of turbo generator in nuclear power station.Its performance quality directly has influence on stability and the efficiency of generating set.Consider safely etc. based on water resources, energy-conservation and nuclear power apparatus, China again use or the newly-built nuclear power station overwhelming majority is based upon coastal region and is medium with seawater, cool nuclear island, the hydrogen of turbo generator inner loop of conventional island system and air by heat exchange method, and stator, rotor around core assembly.And seawater is the coolant that corrosivity is very serious, in order to improve the corrosion resistance of sheet assemble aerial cooler, what conventional Air flow adopted is that CuNi30 cooling water pipe and CuZnSn/HSn62-1 tube sheet reach etch-proof effect.And the corrosion that CuNi30 and HSn62-1 tube sheet also occurs in various degree is in the seawater present.Cause nuclear power pipe and hydroecium to produce to reveal.Cause generator insulating to puncture, maintenance workload is large, and useful life is short.Some are so at present also had cooling water pipe to be changed into titanium pipe costly; titanium is the metal with strong deactivation tendency; a kind of stable oxidizability diaphragm can be generated rapidly in atmosphere with in oxidizability or neutral aqueous solution; even if because some reason film is destroyed; also can automatically recover rapidly, titanium also has good corrosion resistance to most of compatibility.Titanium has excellent corrosion resistance to most of salting liquid.But because nuclear power station surrounding environment is generally in high temperature, in the highly-saline naval air environment of high humidity.Under naval air environment, not only air humidity is large, and containing sodium chloride particle, these sodium chloride particles can in above equipment and steel structure surface precipitation, when air humidity is large, metal surface has water membrane to form (generally thick at 20-300um), moisture film has dissolved the sodium chloride particle on the equipment that is deposited in and steel structure surface, form a kind of environment being referred to as micro-seawater, this corrosion process meets electrochemical corrosion rule in electrolyte, naval air environment is serious for the corrosion of metal structure and equipment as can be seen here, there is the existence of Cl-simultaneously, titanium steel composite board in such circumstances, titanium pipe and red copper fin corrosion liquid can not be escaped by luck.
Summary of the invention
Technical problem to be solved by this invention is: provide a kind of nuclear power turbo generator air cooler, this air cooler can adapt to the cooling to nuclear power turbine-generator unit under style atmospheric environment, this air cooler corrosion resistance is strong, can reduce electrochemical corrosion, improves useful life.
For solving the problems of the technologies described above, technical scheme of the present invention is: a kind of nuclear power turbo generator air cooler, comprise housing, the two ends of housing are fixed with into water tube sheet and water outlet tube sheet respectively, some cooling water pipes are fixed with between two tube sheets, the arranged outside of described tube sheet has into water cover and water cover, this water inlet cover constitutes intake chamber with water inlet tube sheet, water cover and water outlet tube sheet constitute water-supplying chamber, the two ends of described cooling water pipe are communicated with water-supplying chamber with intake chamber respectively, each cooling water pipe is all fixed with some fin, air cooler also comprises cathode current protective device, this cathode current protective device comprises DC power supply and adjustable resistance, the negative pole of this DC power supply is connected with one of them fin, electrically connected by the realization that contacts of the cooling pipe box on fin between each fin, the positive pole of described DC power supply is connected to into water tube sheet or water outlet tube sheet, the fin of close water inlet tube sheet or water outlet tube sheet contacts with water inlet tube sheet or water outlet tube sheet and realizes loop, described adjustable resistance is series in circuit.
As the preferred scheme of one, in described intake chamber, be also fixed with spelter.
As the preferred scheme of one, described water inlet cover is provided with flow guiding inclined plate with the place of company of water inlet tube sheet.
As the preferred scheme of one, described water inlet tube sheet is titanium steel composite board, and this influent side is titanium layer, and land side is steel layer.
As the preferred scheme of one, described water outlet tube sheet is titanium steel composite board, and this water outlet tube sheet water outlet side is titanium layer, and the land side of water outlet tube sheet is steel layer.
As the preferred scheme of one, vertical shockproof supporting bracket is also fixed with in described housing, this shockproof supporting bracket is provided with several are convenient to that cooling water pipe passes through hole, each cooling water pipe one_to_one corresponding runs through through hole by described shockproof supporting bracket support, and described shockproof supporting bracket is in the middle part of cooling water pipe.
As the preferred scheme of one, the hole internal fixtion that passes of described shockproof supporting bracket has shockproof gum cover, and described cooling water pipe is installed in shockproof gum cover.
After have employed technique scheme, effect of the present invention is: because air cooler also comprises cathode current protective device, this cathode current protective device comprises DC power supply and adjustable resistance, the negative pole of this DC power supply is connected with one of them fin, electrically connected by the realization that contacts of the cooling pipe box on fin between each fin, the positive pole of described DC power supply is connected to into water tube sheet or water outlet tube sheet, the fin of close water inlet tube sheet or water outlet tube sheet contacts with water inlet tube sheet or water outlet tube sheet and realizes loop, described adjustable resistance is series in circuit, so each fin is all connected in circuit, so can effectively prevent titanium and steel plate, titanium pipe and fin (copper sheet) because of caused by the extremely defect of titanium own difference between current corrode, in potential difference corrosion impressed current system between fin and titanium pipe, voltage 8-9V, protective current 10-15A, red copper fin current potential keeps between-0.85-0.95V scope.Same in above environment, copper radiating rib and titanium cooling water pipe contact site, major part is linear contact lay mode; there is potential difference corrosion in fin and titanium pipe, fin and titanium Guan Jun are in the cathode protection device of impressed current, and its potential difference is reduced; reduce extent of corrosion, improve useful life.
Again owing to being also fixed with spelter in described intake chamber, when this normally works, protect hydroecium in the mode of sacrificial anode spelter, especially the corrosion in weld seam and iron contamination region.
Again because described water inlet cover is provided with flow guiding inclined plate with the place of company of water inlet tube sheet, this structure can make even flow field, reduces back bending place flow resistance.
Again because described water inlet tube sheet is titanium steel composite board, this influent side is titanium layer, and land side is steel layer, effectively prevents seawater aqueous corrosion, and steel layer ensures the intensity of tube sheet.
Again owing to being also fixed with vertical shockproof supporting bracket in described housing, this shockproof supporting bracket is provided with several are convenient to that cooling water pipe passes through hole, each cooling water pipe one_to_one corresponding runs through through hole by described shockproof supporting bracket support, and described shockproof supporting bracket is in the middle part of cooling water pipe.The hole internal fixtion that passes of described shockproof supporting bracket has shockproof gum cover, and described cooling water pipe is installed in shockproof gum cover.Like this, in the vibrations that action of high-speed airflow and generator operation produce, titanium cooling water pipe and shockproof supporting bracket easily occur wear and tear and collide, and adopt shockproof glue based nested structure effectively can prevent generation of wearing and tearing, and shockproof supporting bracket can effective supporting titanium cooling water pipe.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the present invention is further described.
Fig. 1 is the structural representation of the embodiment of the present invention;
Fig. 2 is the structural representation of the cathode current protective device of the embodiment of the present invention;
Fig. 3 is the structural representation of the shockproof supporting bracket of the embodiment of the present invention;
Fig. 4 is the structural representation of the intake chamber of the embodiment of the present invention;
In accompanying drawing: 1. housing; 2. intake chamber; 3. water inlet pipe; 4. outlet pipe; 5. water-supplying chamber; 6. cooling water pipe; 7. fin; 71. lamellar bodies; 72. cooling pipe boxes; 8. DC power supply; 9. adjustable resistance; 10. shockproof supporting bracket; 11. shockproof gum covers; 12. flow guiding inclined plates; 13. water inlet tube sheets; 131. titanium layer; 132. steel layer; 14. water outlet tube sheets.
Embodiment
Below by specific embodiment, the present invention is described in further detail.
As shown in Figures 1 to 4, a kind of nuclear power turbo generator air cooler, comprise housing 1, the two ends of housing 1 are fixed with into water tube sheet 13 and water outlet tube sheet 14 respectively, be fixed with some cooling water pipes 6 between two tube sheets, the arranged outside of described tube sheet has into water cover and water cover, and this water inlet cover constitutes intake chamber 2 with water inlet tube sheet 13, water cover and water outlet tube sheet 14 constitute water-supplying chamber 5, are also fixed with spelter in described intake chamber 2.Described water inlet cover is provided with flow guiding inclined plate 12 with the place of company of water inlet tube sheet 13.Described water inlet tube sheet 13 is titanium steel composite board, and this influent side is titanium layer 131, and land side is steel layer 132.Described water outlet tube sheet 14 is titanium steel composite board, and this water outlet tube sheet 14 water outlet side is titanium layer 131, and the land side of water outlet tube sheet 14 is steel layer 132.The inner surface of described water inlet cover and water cover can arrange titanium layer 131 equally.
The two ends of described cooling water pipe 6 are communicated with water-supplying chamber 5 with intake chamber 2 respectively, and each cooling water pipe 6 is all fixed with some fin 7, and this fin 7 comprises lamellar body 71 and cooling pipe box 72.Air cooler also comprises cathode current protective device; this cathode current protective device comprises DC power supply 8 and adjustable resistance 9; the negative pole of this DC power supply 8 is connected with one of them fin 7; electrically connected by the realization that contacts of the cooling pipe box 72 on fin 7 between each fin 7; the positive pole of described DC power supply 8 is connected to into water tube sheet 13 or water outlet tube sheet 14; the fin 7 of close water inlet tube sheet 13 or water outlet tube sheet 14 contacts with water inlet tube sheet 13 or water outlet tube sheet 14 and realizes loop, and described adjustable resistance 9 is series in circuit.Vertical shockproof supporting bracket 10 is also fixed with in described housing 1, this shockproof supporting bracket 10 is provided with several are convenient to that cooling water pipe 6 passes through hole, each cooling water pipe 6 one_to_one corresponding runs through and is supported by described shockproof supporting bracket 10 through hole, and described shockproof supporting bracket 10 is in the middle part of cooling water pipe 6.The hole internal fixtion that passes of described shockproof supporting bracket 10 has shockproof gum cover 11, and described cooling water pipe 6 is installed in shockproof gum cover 11.This shockproof gum cover 11 is silica gel material.
Operation principle of the present invention is: titanium and steel form galvanic corrosion, and electrochemical reaction occurs for it:
Anode (steel pipe plate) Fe → Fe
2++ 2e
Negative electrode (titanium pipe) 2H
20+2e → H
2+ 2OH
-
The evolving hydrogen reaction that negative electrode occurs will destroy the passivating film of titanium, and causes hydrogen to infiltrate Titanium base formation TiH
2and catalysis.When just Hydrogen Brittleness Phenomena occurring during three conditions below external world's adjustment meets.
(1) the PH > 12 of solution
(2) temperature > 80 DEG C
(3) mechanism that can produce hydrogen must be had.
Impressed cathodic current is protected, and in the potential difference corrosion impressed current system between fin 7 and titanium pipe, voltage 8-9V, protective current 10-15A, red copper fin 7 current potential keeps between-0.85-0.95V scope.Although generator system does not have magnetic field shielding device, always there is leakage field phenomenon, when magnetization phenomenon is extended on aerial cooler, just exacerbate the generation potential difference corrosion phenomenon between different materials.Therefore, the prismatic iron setting up 20X20 in the windward side of sheet assemble aerial cooler is slipped through the net, and with armoured magnetic field, reduces the formation of high potential between different materials.
Claims (7)
1. a nuclear power turbo generator air cooler, comprise housing, the two ends of housing are fixed with into water tube sheet and water outlet tube sheet respectively, some cooling water pipes are fixed with between two tube sheets, the arranged outside of described tube sheet has into water cover and water cover, this water inlet cover constitutes intake chamber with water inlet tube sheet, water cover and water outlet tube sheet constitute water-supplying chamber, the two ends of described cooling water pipe are communicated with water-supplying chamber with intake chamber respectively, each cooling water pipe is all fixed with some fin, it is characterized in that: air cooler also comprises cathode current protective device, this cathode current protective device comprises DC power supply and adjustable resistance, the negative pole of this DC power supply is connected with one of them fin, electrically connected by the realization that contacts of the cooling pipe box on fin between each fin, the positive pole of described DC power supply is connected to into water tube sheet or water outlet tube sheet, the fin of close water inlet tube sheet or water outlet tube sheet contacts with water inlet tube sheet or water outlet tube sheet and realizes loop, described adjustable resistance is series in circuit.
2. a kind of nuclear power turbo generator air cooler as claimed in claim 1, is characterized in that: be also fixed with spelter in described intake chamber.
3. a kind of nuclear power turbo generator air cooler as claimed in claim 2, is characterized in that: described water inlet cover is provided with flow guiding inclined plate with the place of company of water inlet tube sheet.
4. a kind of nuclear power turbo generator air cooler as claimed in claim 3, it is characterized in that: described water inlet tube sheet is titanium steel composite board, this influent side is titanium layer, and land side is steel layer.
5. a kind of nuclear power turbo generator air cooler as claimed in claim 4, is characterized in that: described water outlet tube sheet is titanium steel composite board, and this water outlet tube sheet water outlet side is titanium layer, and the land side of water outlet tube sheet is steel layer.
6. a kind of nuclear power turbo generator air cooler as claimed in claim 5, it is characterized in that: in described housing, be also fixed with vertical shockproof supporting bracket, this shockproof supporting bracket is provided with several are convenient to that cooling water pipe passes through hole, each cooling water pipe one_to_one corresponding runs through through hole by described shockproof supporting bracket support, and described shockproof supporting bracket is in the middle part of cooling water pipe.
7. a kind of nuclear power turbo generator air cooler as claimed in claim 6, is characterized in that: the hole internal fixtion that passes of described shockproof supporting bracket has shockproof gum cover, and described cooling water pipe is installed in shockproof gum cover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410492204.1A CN104242556B (en) | 2014-09-24 | 2014-09-24 | Air cooler for nuclear power steam turbine generators |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410492204.1A CN104242556B (en) | 2014-09-24 | 2014-09-24 | Air cooler for nuclear power steam turbine generators |
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| Publication Number | Publication Date |
|---|---|
| CN104242556A true CN104242556A (en) | 2014-12-24 |
| CN104242556B CN104242556B (en) | 2017-04-19 |
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|---|---|---|---|
| CN201410492204.1A Active CN104242556B (en) | 2014-09-24 | 2014-09-24 | Air cooler for nuclear power steam turbine generators |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107086743A (en) * | 2017-05-22 | 2017-08-22 | 哈尔滨电气动力装备有限公司 | HTGR nuclear power factory owner's cooling blower motor of oil lubrication |
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Cited By (1)
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| CN107086743A (en) * | 2017-05-22 | 2017-08-22 | 哈尔滨电气动力装备有限公司 | HTGR nuclear power factory owner's cooling blower motor of oil lubrication |
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| Publication number | Publication date |
|---|---|
| CN104242556B (en) | 2017-04-19 |
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