CN201306931Y - Direct air-cooling condenser with function on controlling the opening and closing of air inlet channel under heat exchange tube bundle - Google Patents
Direct air-cooling condenser with function on controlling the opening and closing of air inlet channel under heat exchange tube bundle Download PDFInfo
- Publication number
- CN201306931Y CN201306931Y CNU2008202166694U CN200820216669U CN201306931Y CN 201306931 Y CN201306931 Y CN 201306931Y CN U2008202166694 U CNU2008202166694 U CN U2008202166694U CN 200820216669 U CN200820216669 U CN 200820216669U CN 201306931 Y CN201306931 Y CN 201306931Y
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- tube bundle
- air
- rotating shaft
- heat
- exchanging tube
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Abstract
The utility model discloses a direct air-cooling condenser with the function on controlling the opening and closing of an air inlet channel under a heat exchange tube bundle, which comprises an air cylinder (10), an air cooling heat exchange tube bundle (7), a tube bundle support frame (8) and an air cooling platform (9), and is characterized in that an air shield which is used for controlling the opening and closing of the air inlet channel of the air cooling heat exchange tube bundle (7) is arranged under the air cooling heat exchange tube bundle (7); the air shield comprises a control drive system (1), a guide rail, a guide rail support frame (2) and an air shield plate (3), wherein the control drive system (1) comprises a rotating shaft (1.2) and a steel cable (1.3); or the air shield comprises a control drive system (1), a pull rod, a pull rod support frame (4) and a plurality of air shield blades (5). The utility model can reduce the capital cost and run more economically.
Description
(1) technical field
The utility model relates to a kind of direct air cooled condenser, is applicable to the heat power station and the turbine direct air cooled condenser system of water scarcity.
(2) background technology
It is made up of the direct air cooled condenser system heat-exchanging tube bundle, blower fan group, steel platform, windbreak, jet chimney, condensing water conduit, vacuum lead, water ring vacuum pump (stream-jet ejector) and electric control system.Direct air cooled condenser is dried by the tube bank of blower fan heat exchanging, and the steam that generator/turbine is come is condensed into water in heat-exchanging tube bundle, moves in design load with the steady pressure jar that keeps sending out control group/turbine unit.But at northern area, when unit is in winter operation, particularly during winter underload or winter unit starting operation, steam load is lower than unit and designs minimum antifreeze load.At this moment, even blower fan is all stopped transport, but air cooling tubes condenser generally is in tens meters high places, because the effect such as wind of pulling out of device such as windbreak, the above wind speed of 0.4m/s is still arranged between air cooling heat-exchanging tube bundle fin, and environment temperature is far below 0 ℃ at this moment, and heat transfer temperature difference is big, and steam flow is very little, after steam enters in the heat-transfer pipe, just condensed fully on following current tube bank top, its condensate water is in deadweight effect lower edge tube wall flows downward process, again constantly and the cool ambient air heat exchange, its degree of supercooling constantly increases, finally in tube bank bottom or the tube bank header frozen of condensing, even, cause serious consequence with the heat-transfer pipe bursting by freezing.
At present, prevent that air cooling tubes condenser from freezing the employing measure and mainly containing: determine that the minimum antifreeze load of tube bank, the suitable K/D of employing are provided with separation valve door than (concurrent-countercurrent tube bank quantity ratio) structure, VFC rotation speed of fan, jet chimney.Wherein more effectively separation valve door is set at jet chimney, when unit load less than design during antifreeze load, suitable valve-off, the operation of cut-out heat-sink unit, to import in the vapor collection in the residue heat-sink unit, increase also makes these unit heat exchange loads be higher than minimum antifreeze load, prevents that effectively air cooling tubes condenser from freezing the generation of situation, ensures the normal operation of Air-cooled Unit.But the steam isolating door costs an arm and a leg and utilization rate is not high, is example with the 2X600MW unit, and general design has 16 row air cooling heat exchange units, according to factory site winter temperature difference, is provided with 8～14 steam isolating doors, and total price is more than ten million yuan.But valve wherein over half only used in unit winter starting operation the same day, and other several years even time decades all are in idle state.
(3) summary of the invention
The purpose of this utility model is to overcome above-mentioned deficiency, and a kind of direct air cooled condenser that reduces cost of investment, the more economical heat-exchanging tube bundle of operation below band control air intake passage switching function is provided.
The purpose of this utility model is achieved in that the direct air cooled condenser of a kind of heat-exchanging tube bundle below band control air intake passage switching function, comprise air duct, air cooling heat-exchanging tube bundle, tube bundle support frame and air cooling platform, the abat-vent of control air cooling heat-exchanging tube bundle air intake passage switching is installed below described air cooling heat-exchanging tube bundle.
The direct air cooled condenser of the utility model heat-exchanging tube bundle below band control air intake passage switching function, described abat-vent comprises control-driven system, guide rail and guide rail supporting frame and deep bead, control-driven system comprises rotating shaft and wirerope, described guide rail and guide rail supporting frame have two, be symmetrically arranged, rotating shaft also has two, the front and back symmetric arrangement, the deep bead both sides place in the guide rail of guide rail and guide rail supporting frame, deep bead one end is connected with wirerope, the other end is also fixed in a rotating shaft, wirerope is also fixed in another rotating shaft, control-driven system is installed on the tube bundle support frame under the air cooling heat-exchanging tube bundle, and rotating shaft becomes horizontal installation, and two guide rails and guide rail supporting frame are vertical with rotating shaft to be installed on the tube bundle support frame.
The direct air cooled condenser of the utility model heat-exchanging tube bundle below band control air intake passage switching function, described abat-vent comprises control-driven system, pull bar and pull bar bracing frame and the some blades that keep out the wind, some blade order of keeping out the wind are arranged and are linked into an integrated entity by pull bar, the pull bar two ends are connected with an end of two wireropes respectively, the other end of two wireropes is also fixed in two rotating shafts respectively, control-driven system is installed on the tube bundle support frame under the air cooling heat-exchanging tube bundle, rotating shaft becomes horizontal installation, and two pull bars and bracing frame thereof are vertical with rotating shaft to be installed on the tube bundle support frame.
Compare with conventional art, the utility model technology has the following advantages:
1, reduces cost of investment
With Air-cooled Unit heat exchange unit air intake passage sealing, can reduce the minimum antifreeze safe load of unit to greatest extent, when guaranteeing unit safety operation, can reduce the use amount (even can) of steam isolating door, to reduce cost of investment.Sending out the control group with the 2X600MW air cooling is example, at cold district, cost-saved more than 10,000,000 yuans.
2, operation is more economical
Conventional art, a steam isolating door of installation is closed, and just cut off a row heat exchange unit, and every row heat exchange unit is made up of several fan units, can bring the excessive problem of unit load adjusting range, is unfavorable for the economical operation of unit.Use the utility model technology, abat-vent is installed on each fan unit, and abat-vent can enter DCS control, can only cut off the air intake passage of certain fan unit as required, the load adjusting range that is about to unit controls to the fan unit rank, improves the economy of unit operation.
To sum up, when unit winter operation, particularly underload or startup operation, block by of the air intake passage sealing of control abat-vent the proper proportion heat exchange unit, guaranteeing that heat-exchanging tube bundle is calm passes through, thereby under the situation of not destroying system, significantly reduces the heat exchange effect of heat-exchanging tube bundle, the minimum antifreeze load of unit is reduced to minimum level, guarantee in the power plant safety operation, the use amount of minimizing steam isolating (even can), cost of investment reduced greatly.
(4) description of drawings
Fig. 1 is abat-vent structure one schematic diagram in the utility model.
Fig. 2 is the operation principle schematic diagram of abat-vent among Fig. 1.
Abat-vent structure two intentions in Fig. 3 utility model.
The operation principle schematic diagram of Fig. 4 Fig. 3 abat-vent.
Fig. 5 is the utility model is installed abat-vent structure one scheme below the air cooling tubes condenser heat-exchanging tube bundle a schematic diagram.Among the figure, air intake passage is closed fully.
Fig. 6 is the described scheme air intake passage of a Fig. 5 opening schematic diagram.
Fig. 7 is the utility model is installed abat-vent structure two schemes below the air cooling tubes condenser heat-exchanging tube bundle a schematic diagram.
Fig. 8 is the described scheme air intake passage of a Fig. 7 opening schematic diagram.
Reference numeral among the figure:
Control-driven system 1
Guide rail and guide rail supporting frame 2
Pull bar and pull bar bracing frame 4
Windbreak 6
Air cooling heat-exchanging tube bundle 7
Tube bundle support frame 8
Blower fan 11
Drive motors 1.1
Rotating shaft 1.2
Wirerope 1.3
Control appliance 1.4
Positioner 1.5
Pull bar bracing frame 4.1.
(5) specific embodiment
Referring to Fig. 1, abat-vent structure one described in the utility model mainly is made up of control-driven system 1, guide rail and guide rail supporting frame 2 and deep bead 3.Control-driven system 1 mainly is made up of drive motors 1.1, rotating shaft 1.2, wirerope 1.3 and control appliance 1.4 etc.Described guide rail and guide rail supporting frame 2 have two, are symmetrically arranged, and rotating shaft 1.2 also has two, the front and back symmetric arrangement, and two rotating shafts 1.2 link to each other with two drive motors 1.1 respectively, and drive motors 1.1 links to each other with control appliance 1.4.Described deep bead 3 is made by non-ventilating materials such as canvas, sheet irons.Deep bead 3 both sides place in the guide rail of guide rail and guide rail supporting frame 2, and deep bead 3 one ends are connected with wirerope 1.3, and the other end is also fixed in a rotating shaft 1.2, and wirerope 1.3 is also fixed in another rotating shaft 1.2.During use, move, reach the purpose of passage between unlatching/sealing two guide rail supporting frames by the guide rail of drive system pulling deep bead along guide rail supporting frame 2.And when air intake passage was opened, deep bead all twisted in the rotating shaft, as shown in Figure 2.
Referring to Fig. 3, abat-vent structure two described in the utility model, different with structure one is that this abat-vent mainly is made up of control-driven system 1, pull bar and pull bar the bracing frame 4 and some blades 5 that keep out the wind etc.Wherein control-driven system 1 is identical with structure one.Control-driven system 1 mainly is made up of positioner 1.5, rotating shaft 1.2, wirerope 1.3 and control appliance 1.4 etc.Described pull bar and pull bar bracing frame 4 have two, are symmetrically arranged, and rotating shaft 1.2 also has two, the front and back symmetric arrangement, and two rotating shafts 1.2 link to each other with two positions controller 1.5 respectively, and positioner 1.5 links to each other with control appliance 1.4.The described blade 5 of keeping out the wind is made by non-ventilating materials such as sheet irons, and some blades 5 orders of keeping out the wind are arranged and linked into an integrated entity by pull bar.The pull bar two ends are connected with an end of two wireropes 1.3 respectively, and the other end of two wireropes 1.3 is also fixed in two rotating shafts 1.2 respectively.During use, by control-driven system pulling pull bar, make the blade flip-flop movement that keeps out the wind, one-tenth level or vertical shape shown in Fig. 3,4, reach the purpose of passage between unlatching/sealing two pull bar bracing frames.
Scheme one: abat-vent structure one is installed below the air cooling tubes condenser heat-exchanging tube bundle
Referring to Fig. 5, Fig. 5 has provided the schematic diagram that abat-vent (structure one) scheme is installed below the air cooling tubes condenser heat-exchanging tube bundle.This direct air cooled condenser that has control air intake passage switching function mainly is made up of air cooling heat-exchanging tube bundle 7, tube bundle support frame 8, blower fan 11, air duct 10, air cooling platform 9 and abat-vent (structure one).
Referring to Fig. 5～6, described abat-vent (structure one) control-driven system 1 is installed on the tube bundle support frame 8 under the air cooling heat-exchanging tube bundle 7,1.2 one-tenth horizontal installations of rotating shaft.Two guide rails and guide rail supporting frame 2 and rotating shaft 1.2 vertical being installed on the tube bundle support frame 8.When the antifreeze operation of Air-cooled Unit little load in winter, move along guide rail by control-driven system pulling deep bead, tube bank air intake surface between two guide rail supporting frames is all covered, reach the purpose of sealing air intake passage.Because air intake passage is closed, eliminated the effect such as wind of pulling out of windbreak, between the heat-exchanging tube bundle above the abat-vent, pass through, thereby significantly reduce the heat exchange effect of heat-exchanging tube bundle with calm, the antifreeze load of unit minimum is reduced to minimum level.When the air cooling blower fan startup, when Air-cooled Unit need be pressed the normal duty operation, drive system pulling deep bead moved and rolls up along guide rail and is placed in the rotating shaft, promptly opens the air intake passage of blower fan, guaranteed that blower fan system normally moves and the normal heat exchange of heat-exchanging tube bundle.
Scheme two: abat-vent structure two is installed below the air cooling tubes condenser heat-exchanging tube bundle
Referring to Fig. 7, Fig. 7 has provided the schematic diagram that abat-vent (structure two) scheme is installed below the air cooling tubes condenser heat-exchanging tube bundle.This direct air cooled condenser that has control air intake passage switching function mainly is made up of air cooling heat-exchanging tube bundle 7, tube bundle support frame 8, blower fan 11, air duct 10, air cooling platform 9 and abat-vent (structure two).
Equally, referring to Fig. 7～8, described abat-vent (structure two) control-driven system 1 is installed on the tube bundle support frame 8 under the air cooling heat-exchanging tube bundle 7, and rotating shaft becomes horizontal installation.Two pull bars and bracing frame thereof and rotating shaft 1.2 vertical being installed on the tube bundle support frame 8.When the antifreeze operation of Air-cooled Unit little load in winter, by drive system pulling pull bar, make some blades that keep out the wind all change into and restrain the air intake surface parallel shape, thereby the tube bank air intake surface between two bracing frames is all covered, reach the purpose of sealing air intake passage.Equally,, eliminated the effect such as wind of pulling out of windbreak, between the heat-exchanging tube bundle above the abat-vent, passed through, thereby significantly reduced the heat exchange effect of heat-exchanging tube bundle, the antifreeze load of unit minimum has been reduced to minimum level with calm because air intake passage is closed.When air cooling blower fan starts; when Air-cooled Unit need be pressed the normal duty operation, drive system pulling pull bar, the blade that will keep out the wind all changes into and restrains the air intake surface vertical configuration; promptly open the air intake passage (as Fig. 8) of blower fan, guarantee the normal heat exchange of normal operation of blower fan system and heat-exchanging tube bundle.
Above-mentioned two scheme drive system manual operations at the scene, electric operating, steam-operating operation also can insert control signal unit DCS and participate in control.
Manual operation is achieved in that for structure one, referring to Fig. 1, as long as the wirerope that pulling is connected with deep bead just can drag deep bead, reaches the purpose of passage between unlatching/sealing two pull bar bracing frames; For structure two, referring to Fig. 2, same as long as pulling is kept out the wind the pull bar of blade, rotate and the keep out the wind angle of blade of conversion, can reach the purpose of passage between unlatching/sealing two pull bar bracing frames equally.
Electric operating is achieved in that for structure one, referring to Fig. 1, start drive motors rotating shaft is rotated, thereby the wirerope that pulling is connected with deep bead just can drag deep bead, reaches the purpose of passage between unlatching/sealing two pull bar bracing frames; For structure two, referring to Fig. 2, start electronic positioner rotating shaft is rotated, the pull bar of blade thereby pulling is kept out the wind rotates and the keep out the wind angle of blade of conversion, reaches the purpose of passage between unlatching/sealing two pull bar bracing frames.
Pneumatic operation is achieved in that for structure one, referring to Fig. 1, change abat-vent into rotation that pneumatic actuation equipment is realized rotating shaft by drive motors, thereby the wirerope that pulling is connected with deep bead just can drag deep bead, reaches the purpose of passage between unlatching/sealing two pull bar bracing frames; For structure two, referring to Fig. 2, same changes abat-vent into realized rotating shaft by air-operated positioner rotation by electronic positioner, the pull bar of blade thereby pulling is kept out the wind, rotate and the keep out the wind angle of blade of conversion, reach the purpose of passage between unlatching/sealing two pull bar bracing frames.
Control signal is inserted unit DCS participation control to be achieved in that referring to Fig. 1,2, the switching signal of the drive unit of abat-vent is inserted Air-cooled Unit DCS control system, during unit operation, as required, by the monitor coagulation coolant-temperature gage, vacuumize operational factor such as temperature and judge whether to reduce certain heat exchange unit heat exchange load, the operation of remote control control abat-vent solves unit preventing freeze in winter problem.
Claims (7)
1, a kind of direct air cooled condenser of heat-exchanging tube bundle below band control air intake passage switching function, comprise air duct (10), air cooling heat-exchanging tube bundle (7), tube bundle support frame (8) and air cooling platform (9), it is characterized in that: the abat-vent that control air cooling heat-exchanging tube bundle (7) air intake passage switching is installed in described air cooling heat-exchanging tube bundle (7) below.
2, the direct air cooled condenser of a kind of heat-exchanging tube bundle according to claim 1 below band control air intake passage switching function, it is characterized in that: described abat-vent comprises control-driven system (1), guide rail and guide rail supporting frame (2) and deep bead (3), control-driven system (1) comprises rotating shaft (1.2) and wirerope (1.3), described guide rail and guide rail supporting frame (2) have two, be symmetrically arranged, rotating shaft (1.2) also has two, the front and back symmetric arrangement, deep bead (3) both sides place in the guide rail of guide rail and guide rail supporting frame (2), deep bead (3) one ends are connected with wirerope (1.3), the other end is gone up and is fixed around a rotating shaft (1.2), wirerope (1.3) is gone up and is fixed around another rotating shaft (1.2), described control-driven system (1) is installed on the tube bundle support frame (8) under the air cooling heat-exchanging tube bundle (7), rotating shaft (1.2) becomes horizontal installation, and two guide rails and guide rail supporting frame (2) are vertical with rotating shaft (1.2) to be installed on the tube bundle support frame (8).
3, the direct air cooled condenser of a kind of heat-exchanging tube bundle according to claim 1 below band control air intake passage switching function, it is characterized in that: described abat-vent comprises control-driven system (1), pull bar and pull bar bracing frame (4) and the some blades that keep out the wind (5), some blades that keep out the wind (5) order is arranged and is linked into an integrated entity by pull bar, the pull bar two ends are connected with an end of two wireropes (1.3) respectively, the other end of two wireropes (1.3) is gone up and is fixed around two rotating shafts (1.2) respectively, described control-driven system (1) is installed on the tube bundle support frame (8) under the air cooling heat-exchanging tube bundle (7), rotating shaft becomes horizontal installation, and two pull bars and bracing frame thereof are vertical with rotating shaft (1.2) to be installed on the tube bundle support frame (8).
4, the direct air cooled condenser of a kind of heat-exchanging tube bundle below band control air intake passage switching function according to claim 2, it is characterized in that: described control-driven system (1) also includes drive motors (1.1) or pneumatic actuation equipment, and described rotating shaft (1.2) links to each other with drive motors (1.1) or pneumatic actuation equipment.
5, the direct air cooled condenser of a kind of heat-exchanging tube bundle below band control air intake passage switching function according to claim 3, it is characterized in that: described control-driven system (1) also includes positioner (1.5), and described rotating shaft (1.2) links to each other with positioner (1.5).
6, according to the direct air cooled condenser of claim 2 or 4 described a kind of heat-exchanging tube bundle below band control air intake passage switching functions, it is characterized in that: described deep bead (3) is made by canvas or sheet iron.
7, according to the direct air cooled condenser of claim 3 or 5 described a kind of heat-exchanging tube bundle below band control air intake passage switching functions, it is characterized in that: the described blade that keeps out the wind (5) is made by sheet iron.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202166694U CN201306931Y (en) | 2008-11-12 | 2008-11-12 | Direct air-cooling condenser with function on controlling the opening and closing of air inlet channel under heat exchange tube bundle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202166694U CN201306931Y (en) | 2008-11-12 | 2008-11-12 | Direct air-cooling condenser with function on controlling the opening and closing of air inlet channel under heat exchange tube bundle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201306931Y true CN201306931Y (en) | 2009-09-09 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008202166694U Expired - Lifetime CN201306931Y (en) | 2008-11-12 | 2008-11-12 | Direct air-cooling condenser with function on controlling the opening and closing of air inlet channel under heat exchange tube bundle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201306931Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109729894A (en) * | 2019-03-13 | 2019-05-10 | 上海锦屹通信工程有限公司 | A kind of afforestation project plant protection device |
-
2008
- 2008-11-12 CN CNU2008202166694U patent/CN201306931Y/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109729894A (en) * | 2019-03-13 | 2019-05-10 | 上海锦屹通信工程有限公司 | A kind of afforestation project plant protection device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20090909 Effective date of abandoning: 20081112 |