CN106643200A - High-back-pressure condenser - Google Patents
High-back-pressure condenser Download PDFInfo
- Publication number
- CN106643200A CN106643200A CN201610854696.3A CN201610854696A CN106643200A CN 106643200 A CN106643200 A CN 106643200A CN 201610854696 A CN201610854696 A CN 201610854696A CN 106643200 A CN106643200 A CN 106643200A
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- Prior art keywords
- condenser
- plate
- tube
- water chamber
- tube sheet
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28B—STEAM OR VAPOUR CONDENSERS
- F28B1/00—Condensers in which the steam or vapour is separate from the cooling medium by walls, e.g. surface condenser
- F28B1/02—Condensers in which the steam or vapour is separate from the cooling medium by walls, e.g. surface condenser using water or other liquid as the cooling medium
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28B—STEAM OR VAPOUR CONDENSERS
- F28B9/00—Auxiliary systems, arrangements, or devices
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The invention relates to a high-back-pressure condenser. A throat expansion section and a shell expansion section of the condenser are both provided with reinforcing plate sets and protective covers, so that a corrugated pipe used in the condenser is not damaged by external force. A water chamber of the condenser adopts an all-arc water chamber, so that internal eddy current and eddy current dead areas in the water chamber are improved, and cooling water entering a cooling pipe of the condenser is uniform in flowing speed. Compared with a traditional water chamber, materials are largely saved, the machining difficulty is reduced, and the machining cost is reduced. A heat exchange pipe of the condenser adopts a novel pipe distributing mode on a middle pipe plate, so that a pipe speed airflow flowing speed is uniform without eddy currents, the shell side steam resistance is low, and the heat transfer coefficient of the condenser is high.
Description
Technical field
The present invention relates to field of heat exchangers, more particularly to a kind of high back pressure condenser.
Background technology
At present, China's power system remains high energy consumption industry, and the energy-saving of power system is China's energy-saving and emission-reduction
Important channel.And cogeneration of heat and power is one of energy-saving important channel of power system, the wherein energy-saving effect of high back pressure heat supply
It is the most notable.Condensing-type unit, high back pressure heat supply heats heat supply network recirculated water by improving low pressure (LP) cylinder exhaust steam pressure and exhaust temperature
Reach heat supply purpose.
Existing bank of condenser pipes design condensing effect is undesirable or even there is vortex dead band, and shell-side flow resistance is excessive and is subcooled
Degree is big, and vapour locking is uneven, there is transregional flowing, and Numerical heat transfer coefficient is undesirable, and the steam flow that there is not homocoagulation degree is mutually blended
Even gas leakage, there is that tube bank arrangement is not compact enough to make that investment substantially increases and retrofitted unit cannot be adopted because shell structure is size-constrained
With.
The raising of low pressure (LP) cylinder exhaust steam pressure and temperature causes temperature in condenser higher, due to cooling tube and case material not
Together, bigger thermal expansion difference can be produced between the two, and produced stress is also bigger.If using existing condenser, condenser
Housing and cooling tube and in front and back hydroecium will be deformed or damage.In order to avoid thermal expansion brings in high back pressure condenser
Hidden danger, takes the mode for installing corrugated-type expansion joint additional, it is ensured that condenser is more safe and reliable.The ripple of currently common corrugated-type expansion joint
Line pipe all it is exposed outside, without any safeguard measure, and low intensity, transport is easy to damage bellows when installing.
Traditional hydroecium is flat cover.Flat cover hydroecium inside molded line is not enough smoothed, and is easily spelled in flat cover and hydroecium housing
Meet place to produce vortex and be vortexed dead band, unit efficiency and economy are had a negative impact.The ordinary carbon steel that traditional hydroecium is selected
The structure of material and flat cover, can cause coverboard thickness excessive for the design of high back pressure condenser water box, and waste of materials, increase adds
The problems such as work difficulty and processing cost.The design of traditional hydroecium widens gusset and integrally strengthens on hydroecium surface, not only wasted material but also
So that processing transport extremely inconvenience.Traditional Non-Destructive Testing to hydroecium welding point cannot ensure that high back pressure condenser water box is welded
The quality of joint.
Material, the thickness of coverboard, housing splicing welding joint and flat cover and housing that traditional flat cover hydroecium is used due to it
The stress concentration of overlapping part weld seam so that it cannot meet the pressure-bearing demand of high back pressure condenser water box at all.
The content of the invention
It is an object of the invention to：Unreasonable for above-mentioned existing bank of condenser pipes arrangement, corrugated-type expansion joint is easily damaged
Bad, condenser water box is unsatisfactory for highback pumping chamber requirement, so as to cause the unconspicuous problem of the energy-saving effect of condenser, the present invention
Propose a kind of high back pressure condenser.
The technical solution used in the present invention is as follows：
A kind of high back pressure condenser, comprising condenser shell 3 and the condenser throat 2 being connected on condenser shell 3, coagulates
Vapour device housing 3 is externally connected with condenser front end-plate pipe and condenser rear end tube sheet, and intermediate plate pipe 25 is fixed with condenser shell,
Characterized in that, condenser throat 2 is connected with the corrugated-type expansion joint 7 with protection device, the condenser front end-plate Guan Shangyou
Full arc shape front water chamber 4, is connected with hydroecium 5 after full arc shape on the tube sheet of the condenser rear end, hydroecium 5 and condenser shell after full arc shape
Corrugated-type expansion joint 7 between body 3 has protection device, has tube bank on the sagging plate 25 in condenser shell 3.
A kind of described high back pressure condenser, the full arc container that the housing 10 of hydroecium is welded into for curved plate, full arc
Describe that device is welded to connect the full arc water chamber of composition with banding flange, manhole 11, the one end of manhole 11 are provided with the full arc water chamber
It is welded on full arc water chamber, the other end is cover plate for manhole, there is air vent 12 on full arc water chamber.
A kind of described high back pressure condenser, the bellows 13 is connected with deflector A14 and deflector B15, deflector
Reinforcing plate group A16, reinforcing plate group B17 and protective cover 18 are fixed with A14, deflector B15.
A kind of described high back pressure condenser, the tube bundle region top of the condenser sagging plate is divided into tube sheet center line
Symmetrical both sides, are all made up of per side M shapes tube bundle region 19, the M shapes tube bundle region downside, are provided with inverted triangle tube bundle region 20, institute
The tortuous tube bank 21 in condenser sagging plate tube sheet face bottom is stated with regard to the symmetrical arrangement of tube sheet center line.Outside the bottom of tube sheet face
Lateral curvature bending area under control 22 is symmetrical with regard to tube sheet face center line, and air cooling zone both sides tube bundle region 23 is with regard to tube sheet face center line or so
It is arranged symmetrically.
In sum, as a result of above-mentioned technical proposal, the invention has the beneficial effects as follows：
A kind of high back pressure condenser is compensated because housing and heat exchange tube material are inconsistent using the corrugated-type expansion joint of peculiar pattern
The swollen difference brought, it is ensured that the safe operation of condenser.The forward and backward hydroecium of the high back pressure condenser adopts " yurt " type full arc
Shape hydroecium, compare common hydroecium not only the high pressure-bearing property of structural strength it is good and also by arrange specific pattern reinforcement, reinforcing ring
So that hydroecium case material thickness is thick unlike common hydroecium, it is cost-effective.Simultaneously full arc water chamber compares common hydroecium streamline
Smooth not hide silt without vortex, Rubber Ball Recover Rate of Condenser Cleaning System is high, and recirculated water water resistance is little.The high back pressure condenser is using new
Type piping mode, the piping mode has that heat exchange efficiency is high, vapour lock is little, the low advantage of condensate undercooling, and its steam flow flow field is equal
Even uniform without vortex, heat load distribution, the coefficient of heat transfer can improve the coefficient of heat transfer more than 20% than common stringing scheme, compare HE
The high 10%-20% of I calculated values, unit energy-saving effect is obvious.High back pressure heat supply is by improving low pressure (LP) cylinder exhaust steam pressure and steam discharge temperature
Degree, heating heat supply network recirculated water reaches heat supply purpose.As a result of the combination of above-mentioned technical proposal, the energy-conservation of high back pressure condenser
Effect is clearly.
Description of the drawings
Fig. 1 is high back pressure condenser outline drawing of the present invention；
Fig. 2 is the front view of highback pumping chamber；
Fig. 3 is corrugated-type expansion joint partial enlarged drawing；
Fig. 4 is corrugated-type expansion joint front view；
Fig. 5 is the sectional view in corrugated-type expansion joint A-A faces
Fig. 6 is tube sheet schematic diagram；
Mark in figure：1- condenser throats expand successively, 2- condenser throats, 3- condenser shells, 4- front water chambers, after 5-
Hydroecium, 6- evacuation tracheaes, 7- corrugated-type expansion joints, 8- condenser bearings, hydroecium bearing after 9-, 10- hydroecium housings, 11- manholes,
12- air vents, 13- bellowss, 14- deflector A, 15- deflector B, 16- reinforcing plate groups A, 17- reinforcing plate groups B, 18- protections
Cover, 19-M shape tube bundle regions, 20- inverted triangle tube bundle regions, the tortuous tube bank in 21- tube sheets face bottom, 22- tube sheets face lower outside complications are curved
Area under control, 23- air cooling zones both sides tube bundle region, 24- air cooling zones, 25- sagging plates.
Specific embodiment
All features disclosed in this specification, in addition to mutually exclusive feature and/or step, can be with any
Mode is combined.
The present invention is elaborated with reference to Fig. 1, Fig. 3, Fig. 6.
As shown in figure 1, a kind of high back pressure condenser, comprising condenser shell 3 and the condensing being connected on condenser shell 3
Device throat 2, condenser shell 3 is externally connected with condenser front end-plate pipe and condenser rear end tube sheet, is fixed with condenser shell
Intermediate plate pipe 25, it is characterised in that condenser throat 2 is connected with the corrugated-type expansion joint 7 with protection device, before the condenser
There is full arc shape front water chamber 4 on end plate pipe, hydroecium 5 after full arc shape is connected with the tube sheet of the condenser rear end, hydroecium 5 after full arc shape
There is protection device with the corrugated-type expansion joint 7 between condenser shell 3, have tube bank on the sagging plate 25 in condenser shell 3.
The hydroecium, for steels for pressure vessel use, preferred hydroecium material is pressure vessel Q345R steel to the material for adopting,
By split welding manufacture into the full arcuate structure for being similar to " yurt " shape, its two ends is welded by herringbone weld seam, and according to
Different operating modes selectes thickness of shell.Connecting plate is fixedly connected with banding flange.Reinforcement is installed additional in the region of stress concentration of hydroecium
Muscle is ensureing its pressure-bearing property and intensity；Improve to the Non-Destructive Testing grade of hydroecium welding point to guarantee with reference to pressure container standard
Quality of weld joint.
It is located on the herringbone weld seam at four angles of housing in front water chamber upper shell reinforcement, to herringbone weld seam
Reinforced.Two ends and middle part on full arc water chamber housing respectively arrange an annular gusset.Hanger is arranged on hydroecium shell
On body.Water inlet pipe and drainpipe are welded on the top of hydroecium housing, and gusset is provided with plus strengthened between hydroecium housing and water inlet pipe,
And flase floor is set in water inlet pipe porch, reinforcement gusset is provided between hydroecium housing and drainpipe.In being provided with the middle of hydroecium
Space bar, arranges central dividing plate reinforcement at reinforcing plate, and one end of central dividing plate 25 connects with the inwall of the hydroecium housing 10
Connect, the other end is fixedly connected with connecting plate.Connecting plate is fixedly connected with banding flange.25 points of central dividing plate on hydroecium housing 10
In the two chambers for separating, a manhole 5, convenient maintenance are respectively set.One air vent is set on the housing of the offside of water inlet pipe 8
12.A kind of described hydroecium for high back pressure condenser, the herringbone commissure at four angles of full arc water chamber housing is provided with
Housing reinforcement.The medium position of hydroecium inwall is provided with longitudinal bracing pipe 1.
It is located on the herringbone weld seam at four angles of housing in rear hydroecium upper shell reinforcement, to herringbone weld seam
Reinforced.Two ends and middle part on full arc water chamber housing respectively arrange an annular gusset, the middle position of hydroecium inwall
Install three longitudinal bracing pipes.And manhole is set on hydroecium housing.In one end of hydroecium, air vent 12 is set.
As shown in figure 3, a kind of high back pressure condenser corrugated-type expansion joint, including the deflector that side is connected with bellows 13
A-14, the deflector B-15 that side is connected with bellows, located at the inner sleeve of the open side of bellows 13, connects between inner sleeve and deflector
Inner sleeve cushion block is connected to, temporary support bar, side connection reinforcement plate group A-16 of bellows 13 are connected between the both sides of expansion joint
Side, the side of bellows opposite side connection reinforcement plate group B-17, reinforcing plate group A-16 is connected with deflector A-14, reinforcing plate
Group B-17 is connected with deflector B-15, temporary support plate side connection deflector A-14, temporary support plate opposite side connection water conservancy diversion
Plate B-15.The opposite side of reinforcing plate group A-16 is welded on high back pressure condenser shell, the opposite side welding of reinforcing plate group B-17
In reinforcing plate group.Protective cover 18 is welded in any one group of reinforcing plate group, the position of protective cover be located at reinforcing plate group A-16 and
Position between reinforcing plate group B-17, the unwelded side of protective cover 18 extends beyond the side reinforcing plate group near bellows one
The edge of side.
A kind of novel pipe laying mode as shown in Figure 6, heat exchanger tube is connected through the pore of sagging plate with two ends tube sheet, changes
Heat pipe can be expanded joint or expansion joint welding with the connection of two ends tube sheet.
Tube bank is arranged on condenser sagging plate 25, and the tube sheet bottom of condenser sagging plate 25 is centered on axis
Position is provided with air cooling zone 24, and the tube bundle region top of the condenser sagging plate 25 is divided into symmetrical both sides with tube sheet center line,
All it is made up of M shapes tube bundle region 19 per side, the downside of the M shapes tube bundle region 19 is provided with inverted triangle tube bundle region 20, in the condenser
Between the tortuous tube bank 22 in tube sheet tube sheet face bottom with regard to the symmetrical arrangement of tube sheet center line.
Tube sheet face lower outside complications bend pipe area 22 is symmetrical with regard to tube sheet face center line, air cooling zone both sides tube bundle region 23
It is symmetrically arranged with regard to tube sheet face center line.Horizontal air cooling zone steam baffle C, air cooling zone side are provided with the top of air cooling zone to be had
Air cooling zone steam baffle B, opposite side has air cooling zone steam baffle A, and air cooling zone steam baffle B is with tube bank center line into 37 ° of angles, air cooling zone gear
Vapour plate C is with tube bank center line into 37 ° of angles, and three air cooling zone steam baffles cause air cooling zone to constitute a tapered region, empty
Cold-zone 12 constitutes tapered air cooling tube bundle region with the tube bank on air cooling zone.The air cooling zone gear vapour of the upper level of tapered air cooling tube bundle region
Plate C20 is provided with an evacuation tracheae 10.Stainless steel steam baffle is provided with tapered air cooling tube bundle region, stainless steel steam baffle is arranged on
Between condenser front end tube sheet and condenser rear end tube sheet, stainless steel steam baffle is shaped as waveform.
Enclosed by stainless steel steam baffle and air cooling zone steam baffle A and air cooling zone steam baffle B on condenser sagging plate 25
Into region in be provided with air cooling through flow hole, air cooling through flow hole arranged for interval in rectangular area, its quantity is that air cooling zone is arranged
Pipe number total amount 3%-5%.Restrain on condenser sagging plate 25 piping mode be up and down to point cooling water two-tube-pass or
It is cooling water single tube journey.
When restrain on condenser sagging plate 25 piping mode be up and down to point cooling water two-tube-pass when, condenser intervalve
The tube sheet of plate 25 middle part arranges upper strata porous drip water plate and lower floor's porous drip water plate, and drenches in upper strata porous drip water plate and lower floor's porous
A point journey steam baffle is provided with the outside of water plate.
In the condenser, steam turbine discharge steam between the outermost heat exchange tube of bank of condenser pipes enter it is new
Piping mode is restrained, and steam is cooled in upper bundle and condensation causes steam flow rate to decline rapidly, then in tube sheet " lotus seat
Shape " tube bundle region continues cooled and condenses, and then flows to tapered air cooling tube bundle region from the bottom of tapered air cooling tube bundle region and is entered one
Step is cooled, the evacuation tube on last remaining a small amount of tapered air cooling tube bundle region tops of vapour gas mixture Jing by vacuum pumped,
So that condenser maintains certain vacuum.Bank of condenser pipes can be up and down to point cooling water two-tube-pass, or a cooling
Water single tube journey.Described bank of condenser pipes for up and down to point cooling two-tube-pass when, up and down to point bank of condenser pipes tube sheet in
Portion is provided with upper and lower two-layer porous drip water plate to buffer upper bundle condensate washing away and deoxygenation to lower tube bundle, upper
Lower two-layer porous drip water plate outside is provided with point journey steam baffle to maintain steam streamline, it is to avoid flow perturbation occur.
Claims (4)
1. a kind of high back pressure condenser, comprising condenser shell (3) and the condenser throat being connected on condenser shell (3)
(2), condenser shell (3) is externally connected with condenser front end-plate pipe and condenser rear end tube sheet, condenser shell (3) and is fixed with
Intermediate plate pipe (25), it is characterised in that condenser throat (2) is connected with the corrugated-type expansion joint (7) with protection device, described solidifying
There is full arc shape front water chamber (4) on vapour device front end-plate pipe, hydroecium (5) after full arc shape are connected with the tube sheet of the condenser rear end, entirely
Corrugated-type expansion joint (7) after arc between hydroecium (5) and condenser shell (3) with protection device, in condenser shell (3)
Sagging plate has tube bank on (25).
2. a kind of high back pressure condenser according to claim 1, it is characterised in that the housing (10) of hydroecium is curved plate
The full arc container being welded into, full arc container is welded to connect the full arc water chamber of composition with banding flange, on the full arc water chamber
Manhole (11) is provided with, manhole (11) one end is welded on full arc water chamber, and the other end is cover plate for manhole, is had on full arc water chamber
Air vent (12).
3. a kind of high back pressure condenser according to claim 1, it is characterised in that the bellows (13) is connected with water conservancy diversion
Plate A (14) and deflector B (15), on deflector A (14), deflector B (15) reinforcing plate group A (16), reinforcing plate group B are fixed with
And protective cover (18) (17).
4. a kind of high back pressure condenser according to claim 1, it is characterised in that the condenser sagging plate (25)
Tube bundle region top is divided into symmetrical both sides with tube sheet center line, is all made up of M shape tube bundle regions (19) per side, the M shapes tube bank
Area downside, is provided with inverted triangle tube bundle region (20), the tortuous tube bank (21) in condenser sagging plate (25) the tube sheet face bottom with regard to
The symmetrical arrangement of tube sheet center line.Tube sheet face lower outside complications bend pipe area (22) is right with regard to tube sheet face center line or so
Claim, air cooling zone (24) both sides tube bundle region (23) are symmetrically arranged with regard to tube sheet face center line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610854696.3A CN106643200B (en) | 2016-09-27 | 2016-09-27 | A kind of high back pressure condenser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610854696.3A CN106643200B (en) | 2016-09-27 | 2016-09-27 | A kind of high back pressure condenser |
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| Publication Number | Publication Date |
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| CN106643200A true CN106643200A (en) | 2017-05-10 |
| CN106643200B CN106643200B (en) | 2018-07-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610854696.3A Active CN106643200B (en) | 2016-09-27 | 2016-09-27 | A kind of high back pressure condenser |
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| Country | Link |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109341369A (en) * | 2018-09-21 | 2019-02-15 | 东方电气集团东方汽轮机有限公司 | It is a kind of laterally into the condenser of vapour |
| CN111054716A (en) * | 2019-12-27 | 2020-04-24 | 洛阳隆盛科技有限责任公司 | Printed board water cleaning structure and method |
| CN114251952A (en) * | 2021-12-01 | 2022-03-29 | 东方电气集团东方汽轮机有限公司 | Flow guide structure and flow guide method for condenser |
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| CN203731885U (en) * | 2014-01-21 | 2014-07-23 | 青岛捷能高新技术有限责任公司 | Condenser with internal drainage expansion device |
| CN204787891U (en) * | 2015-07-02 | 2015-11-18 | 德阳活力热能机电有限公司 | Heat supply network peak condenser |
| CN204881228U (en) * | 2015-07-02 | 2015-12-16 | 青州凯能热动设备有限公司 | Condenser |
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| JPS57144887A (en) * | 1981-03-03 | 1982-09-07 | Toshiba Corp | Water condenser |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109341369A (en) * | 2018-09-21 | 2019-02-15 | 东方电气集团东方汽轮机有限公司 | It is a kind of laterally into the condenser of vapour |
| CN109341369B (en) * | 2018-09-21 | 2020-06-23 | 东方电气集团东方汽轮机有限公司 | Condenser with lateral steam inlet |
| CN111054716A (en) * | 2019-12-27 | 2020-04-24 | 洛阳隆盛科技有限责任公司 | Printed board water cleaning structure and method |
| CN114251952A (en) * | 2021-12-01 | 2022-03-29 | 东方电气集团东方汽轮机有限公司 | Flow guide structure and flow guide method for condenser |
| CN114251952B (en) * | 2021-12-01 | 2023-07-18 | 东方电气集团东方汽轮机有限公司 | Flow guiding structure and flow guiding method for condenser |
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| Publication number | Publication date |
|---|---|
| CN106643200B (en) | 2018-07-20 |
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