CN104242556B - Air cooler for nuclear power steam turbine generators - Google Patents
Air cooler for nuclear power steam turbine generators Download PDFInfo
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- CN104242556B CN104242556B CN201410492204.1A CN201410492204A CN104242556B CN 104242556 B CN104242556 B CN 104242556B CN 201410492204 A CN201410492204 A CN 201410492204A CN 104242556 B CN104242556 B CN 104242556B
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- tube sheet
- water
- air cooler
- water inlet
- water outlet
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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, particularly relates to a kind of nuclear power steam turbine generator air cooler.
Background technology
With the increasingly depleted of the Ore dyestuff such as coal, oil, natural gas, wind energy, solar energy, underground heat equal energy source presence it is total
Limited, skewness and the low problem of energy density are measured, nuclear power becomes new forms of energy first-selected in China " 12 " planning.Air
Cooler is the key equipment of steam turbine generator in nuclear power station.Its performance quality directly influences the stability and effect of generating set
Rate.Considered based on water resource, energy-conservation and nuclear power apparatus safety etc., China uses again or newly-built nuclear power station is most sets up
In coastal region and with sea water as medium, cooled down inside nuclear island, the steam turbine generator of conventional island system by heat exchange method
The hydrogen and air of circulation, and stator, rotor around core assembly.And sea water is the very serious cooling medium of corrosivity, in order to
The corrosion resistance of sheet assemble air cooler is improved, conventional air cooling uses CuNi30 cooling tubes and CuZnSn/
HSn62-1 tube sheets reach etch-proof effect.And also there is different degrees of corrosion in the seawater in CuNi30 and HSn62-1 tube sheets
Now.Nuclear power pipe and hydroecium is caused to produce leakage.Generator insulating is caused to puncture, maintenance workload is big, and service life is short.Right mesh
Front also to have some that cooling tube is changed into titanium tube costly, titanium is the metal with strong deactivation tendency, in atmosphere and oxygen
The property changed can be quickly generated a kind of stable oxidisability protecting film in neutral aqueous solution, even if because some reason films are broken
It is bad, also rapidly can recover automatically, titanium is to most of compatible also with good corrosion resistance.Titanium has to most of saline solution
Excellent corrosion resistance.But because nuclear power station surrounding is typically in high temperature, in the highly-saline naval air environment of high humidity.
Under naval air environment, not only air humidity is big, and containing Sodium Chloride particle, these sodium chloride particles can be in above equipment
With steel structure surface precipitation, when air humidity is big, metal surface has water membrane to form (typically thick in 20-300um), moisture film
The sodium chloride particle on the equipment of being deposited in and steel structure surface has been dissolved, a kind of environment for being referred to as micro- sea water, this corruption has been formed
Erosion process meets electrochemical corrosion rule in electrolyte, it can be seen that naval air environment is for the corrosion of metal structure and equipment
It is serious, while there is the presence of Cl-, titanium steel composite board in such circumstances, titanium tube and red copper fin corrosion liquid can not
Escape by luck.
The content of the invention
The technical problem to be solved is：A kind of nuclear power steam turbine generator air cooler is provided, the air cooler can
Cooling under to adapt to style atmospheric environment to nuclear power turbine-generator unit, the air cooler corrosion resistance is strong, can reduce electrochemistry
Corrosion, improves service life.
To solve above-mentioned technical problem, the technical scheme is that：A kind of nuclear power steam turbine generator air cooler, including
Housing, being respectively fixed at two ends with into water tube sheet and water outlet tube sheet for housing, is fixed with some cooling tubes between two tube sheets, described
It is provided with into water cover on the outside of water inlet tube sheet, on the outside of water outlet tube sheet water cover is provided with, the water inlet cover is constituted with water inlet tube sheet
Intake chamber, water cover constitutes water-supplying chamber with water outlet tube sheet, and the two ends of the cooling tube connect respectively with intake chamber and water-supplying chamber
Logical, if being respectively and fixedly provided with dry tablet fin on each cooling tube, air cooler also includes cathode current protection device, the cathode current protection
Device includes DC source and adjustable resistance, and the negative pole of the DC source is connected with one of fin, between each fin
Electrically connected by the realization that contacts of the cooling pipe box on fin, the positive pole of the DC source is connected to into water tube sheet or water outlet
Tube sheet, the fin near water inlet tube sheet or water outlet tube sheet is contacted and realizes loop with water inlet tube sheet or water outlet tube sheet, described adjustable
Resistant series are in circuit.
Used as a kind of preferred scheme, the water inlet interior is further fixed on spelter.
Used as a kind of preferred scheme, the water inlet cover is provided with flow guiding inclined plate with the junction of water inlet tube sheet.
Used as a kind of preferred scheme, the water inlet tube sheet is titanium steel composite board, and the influent side of the water inlet tube sheet is titanium layer,
Land side is steel layer.
Used as a kind of preferred scheme, the water outlet tube sheet is titanium steel composite board, and the water outlet tube sheet water outlet side is titanium layer, is gone out
The land side of water tube plate is steel layer.
As a kind of preferred scheme, vertical shockproof gripper shoe is further fixed in the housing, in the shockproof gripper shoe
Be provided with that several are easy to that cooling tube passes through through hole, each cooling tube is corresponded and run through through hole by the shockproof gripper shoe
Support, middle part of the shockproof gripper shoe in cooling tube.
Used as a kind of preferred scheme, the shockproof gripper shoe is fixed with shockproof gum cover, the cooling tube through in hole
It is installed in shockproof gum cover.
After employing above-mentioned technical proposal, the effect of the present invention is：Because air cooler also includes cathode current protection device,
The cathode current protection device includes DC source and adjustable resistance, and the negative pole of the DC source connects with one of fin
Connect, electrically connected by the realization that contacts of the cooling pipe box on fin between each fin, the positive pole connection of the DC source
In water inlet tube sheet or water outlet tube sheet, the fin near water inlet tube sheet or water outlet tube sheet contacts real with water inlet tube sheet or water outlet tube sheet
Existing loop, the adjustable resistance is series in circuit, then each fin is all connected in circuit, then can effectively prevent titanium
With steel plate, titanium tube and fin (copper sheet) because of the difference between current corrosion caused by the defect of titanium pole itself, between fin and titanium tube
Potential difference corrosion impressed current system in, voltage 8-9V, protective current 10-15A, red copper fin current potential holding -0.85-
Between 0.95V scopes.In the same environment more than, copper radiating rib and titanium cooling tube contact site, major part is linear contact lay mode,
There is potential difference corrosion in fin and titanium tube, fin is in the cathode protection device of impressed current with titanium tube so as to electricity
Potential difference is reduced, and reduces extent of corrosion, improves service life.
Again because the water inlet interior is further fixed on spelter, during the normal work, protected in the way of sacrificial anode spelter
Hydroecium, especially weld seam and the corrosion in iron contamination region.
Again due to being provided with flow guiding inclined plate at the company of the water inlet cover and water inlet tube sheet, the structure can make even flow field,
Reduce flow resistance at back bending.
Again because the water inlet tube sheet is titanium steel composite board, the influent side is titanium layer, and land side is steel layer, effectively prevents sea
Water aqueous corrosion, steel layer ensures the intensity of tube sheet.
Again due to being further fixed on vertical shockproof gripper shoe in the housing, several are provided with just in the shockproof gripper shoe
In cooling tube pass through through hole, each cooling tube is corresponded to run through through hole and supported by the shockproof gripper shoe, described shockproof
Middle part of the gripper shoe in cooling tube.The shockproof gripper shoe is fixed with shockproof gum cover through in hole, and the cooling tube installs
In shockproof gum cover.So, the vibrations for producing in action of high-speed airflow and generator operation, titanium cooling tube and shockproof gripper shoe
Easily there is abrasion collision, can effectively prevent abrasion from occurring using shockproof glue nested structure, and shockproof gripper shoe can effectively support titanium
Cooling tube.
Description of the drawings
With reference to the accompanying 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 protection device of the embodiment of the present invention；
Fig. 3 is the structural representation of the shockproof gripper shoe 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 tube；7. fin；
71. lamellar bodies；72. cooling pipe boxes；8. DC source；9. adjustable resistance；10. shockproof gripper shoe；11. shockproof gum covers；12. water conservancy diversion are oblique
Plate；13. water inlet tube sheets；131. titanium layer；132. steel layer；14. water outlet tube sheets.
Specific 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 steam turbine generator air cooler, including housing 1, the two ends of housing 1 are fixed respectively
Have into water tube sheet 13 and water outlet tube sheet 14, some cooling tubes 6 are fixed between two tube sheets, the outside of the water inlet tube sheet is arranged
Have into water cover, on the outside of water outlet tube sheet water cover is provided with, the water inlet cover constitutes intake chamber 2, water cover with water inlet tube sheet 13
Constitute in water-supplying chamber 5, the intake chamber 2 with water outlet tube sheet 14 and be further fixed on spelter.The water inlet cover and water inlet tube sheet 13
Junction is provided with flow guiding inclined plate 12.The water inlet tube sheet 13 is titanium steel composite board, and the influent side of the water inlet tube sheet 13 is titanium layer
131, land side is steel layer 132.The water outlet tube sheet 14 is titanium steel composite board, and the water outlet side of water outlet tube sheet 14 is titanium layer 131, is gone out
The land side of water tube plate 14 is steel layer 132.The inner surface of the water inlet cover and water cover can equally arrange titanium layer 131.
The two ends of the cooling tube 6 connect respectively with intake chamber 2 and water-supplying chamber 5, if being respectively and fixedly provided with dry tablet on each cooling tube 6
Fin 7, the fin 7 includes lamellar body 71 and cooling pipe box 72.Air cooler also includes cathode current protection device, the negative electrode electricity
Stream protection device includes DC source 8 and adjustable resistance 9, and the negative pole of the DC source 8 is connected with one of fin 7, respectively
Electrically connected by the realization that contacts of the cooling pipe box 72 on fin 7 between fin 7, the positive pole connection of the DC source 8
In water inlet tube sheet 13 or water outlet tube sheet 14, the fin 7 near water inlet tube sheet 13 or water outlet tube sheet 14 tube sheet 13 or goes out with intaking
Loop is realized in the contact of water tube plate 14, and the adjustable resistance 9 is series in circuit.It is further fixed in the housing 1 vertical shockproof
Gripper shoe 10, be provided with that several are easy to that cooling tube 6 passes through in the shockproof gripper shoe 10 through hole, a pair of each cooling tube 6 one
Should be through being supported by the shockproof gripper shoe 10 through hole, the shockproof gripper shoe 10 is in the middle part of cooling tube 6.It is described shockproof
Gripper shoe 10 is fixed with shockproof gum cover 11 through in hole, and the cooling tube 6 is installed in shockproof gum cover 11.The shockproof gum cover 11
For silica gel material.
The present invention operation principle be：Titanium constitutes galvanic corrosion with steel, and it occurs electrochemical reaction：
Anode (steel pipe plate) Fe → Fe2++2e
Negative electrode (titanium tube) 2H20+2e→H2+2OH-
The evolving hydrogen reaction that negative electrode occurs will destroy the passivating film of titanium, and cause hydrogen to penetrate into Titanium base and form TiH2And urge
Change.Hydrogen Brittleness Phenomena may occur when extraneous regulation meets three below condition.
(1) the PH ＞ 12 of solution
(2) 80 DEG C of temperature ＞
(3) there must be the mechanism that can produce hydrogen.
Impressed cathodic current is protected, in the potential difference corrosion impressed current system between fin 7 and titanium tube, voltage 8-
9V, protective current 10-15A, the current potential of red copper fin 7 is kept between -0.85-0.95V scopes.Although generator system does not have magnetic field screen
Device is covered, but leakage field phenomenon always occurs, when magnetization phenomenon is extended on air cooler, just exacerbated between different materials
Generation potential difference corrosion phenomenon.Therefore, the prismatic ferrum for setting up 20X20 in the windward side of sheet assemble air cooler is slipped through the net, to shield
Magnetic field is covered, the formation of high potential between different materials is reduced.
Claims (7)
1. a kind of nuclear power steam turbine generator air cooler, including housing, housing is respectively fixed at two ends with into water tube sheet and water outlet
Tube sheet, is fixed with some cooling tubes between two tube sheets, be provided with the outside of the water inlet tube sheet into water cover, outside water outlet tube sheet
Side is provided with water cover, and the water inlet cover constitutes intake chamber with water inlet tube sheet, and water cover constitutes water-supplying chamber with water outlet tube sheet, institute
The two ends for stating cooling tube connect respectively with intake chamber and water-supplying chamber, if being respectively and fixedly provided with dry tablet fin on each cooling tube, its feature
It is：Air cooler also includes cathode current protection device, and the cathode current protection device includes DC source and adjustable resistance, should
The negative pole of DC source is connected with one of fin, is contacted reality by the cooling pipe box on fin between each fin
Now electrically connect, the positive pole of the DC source is connected to into water tube sheet or water outlet tube sheet, near water inlet tube sheet or water outlet tube sheet
Fin is contacted and realizes loop with water inlet tube sheet or water outlet tube sheet, and the adjustable resistance is series in circuit.
2. a kind of nuclear power steam turbine generator air cooler as claimed in claim 1, it is characterised in that：The water inlet is indoor also solid
Surely there is spelter.
3. a kind of nuclear power steam turbine generator air cooler as claimed in claim 2, it is characterised in that：The water inlet cover and water inlet
The junction of tube sheet is provided with flow guiding inclined plate.
4. a kind of nuclear power steam turbine generator air cooler as claimed in claim 3, it is characterised in that：The water inlet tube sheet is titanium
Steel composite board, the influent side of the water inlet tube sheet is titanium layer, and land side is steel layer.
5. a kind of nuclear power steam turbine generator air cooler as claimed in claim 4, it is characterised in that：The water outlet tube sheet is titanium
Steel composite board, the 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 steam turbine generator air cooler as claimed in claim 5, it is characterised in that：Also fix in the housing
Have vertical shockproof gripper shoe, be provided with that several are easy to that cooling tube passes through in the shockproof gripper shoe through hole, each cooling tube
Correspond to run through through hole and supported by the shockproof gripper shoe, middle part of the shockproof gripper shoe in cooling tube.
7. a kind of nuclear power steam turbine generator air cooler as claimed in claim 6, it is characterised in that：The shockproof gripper shoe
Shockproof gum cover is fixed with through in hole, the cooling tube 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 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104242556A CN104242556A (en) | 2014-12-24 |
| CN104242556B true CN104242556B (en) | 2017-04-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410492204.1A Active CN104242556B (en) | 2014-09-24 | 2014-09-24 | Air cooler for nuclear power steam turbine generators |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107086743B (en) * | 2017-05-22 | 2023-03-28 | 哈尔滨电气动力装备有限公司 | Oil-lubricated main cooling fan motor of high-temperature gas cooled reactor nuclear power plant |
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| CN104242556A (en) | 2014-12-24 |
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