CN101419024B - Direct air cooling steam condenser with air intake passage switching control function above wind pipe - Google Patents
Direct air cooling steam condenser with air intake passage switching control function above wind pipe Download PDFInfo
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- CN101419024B CN101419024B CN2008102350305A CN200810235030A CN101419024B CN 101419024 B CN101419024 B CN 101419024B CN 2008102350305 A CN2008102350305 A CN 2008102350305A CN 200810235030 A CN200810235030 A CN 200810235030A CN 101419024 B CN101419024 B CN 101419024B
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Abstract
The invention relates to a direct air-cooled condenser of which the upper part of a wind cylinder has the function of controlling the opening and closing of a wind inlet passage. The direct air-cooled condenser comprises a wind cylinder (10), an air-cooled heat exchange tube bundle (7), a tube bundle supporting frame (8) and an air-cooled platform (9). The direct air-cooled condenser is characterized in that the upper part of the wind cylinder (10) is provided with a wind retaining device for controlling the opening and closing of the wind inlet passage of the wind cylinder (10). A drive control system (1) is arranged on the air-cooled platform (9); two guide rails, a guide rail supporting frame (2) and a rotating shaft (1.2) of the drive control system (1) are vertically arranged on the air-cooled platform (9); and the distance between two guide rails and the guide rail supporting frame (2) is larger than the diameter of a wind outlet of the wind cylinder (10); or the control driving system (1) is arranged on the air-cooled platform (9); two pull rods, a pull rod supporting frame (4) and the rotating shaft (1.2) of the control driving system (1) are vertically arranged on the air-cooled platform (9), and the distance between the two pull rods and the pull rod supporting (4) is larger than the diameter of wind outlet of the wind cylinder (10). The direct air-cooled condenser can reduce investment cost and operate more economically.
Description
(1) technical field
The present invention relates to a kind of direct air cooled condenser, be 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 objective of the invention is to overcome above-mentioned deficiency, a kind of direct air cooled condenser that cost of investment, the more economical air duct of operation top have control air intake passage switching function that reduces is provided.
The object of the present invention is achieved like this: a kind of air duct top has the direct air cooled condenser of 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 duct air intake passage switching is installed above described air duct
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, described control-driven system is installed on the air cooling platform, the rotating shaft of two guide rails and guide rail supporting frame and control-driven system is vertically mounted on the air cooling platform, spacing between two guide rails and the guide rail supporting frame is greater than air duct air outlet diameter, described abat-vent can also comprise 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, described control-driven system is installed on the air cooling platform, the rotating shaft of two pull bars and pull bar bracing frame and control-driven system is vertically mounted on the air cooling platform, and the spacing between two pull bars and the pull bar bracing frame is greater than air duct air outlet diameter.
Compare with conventional art, the technology of the present invention 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 technology of the present invention, 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 among the present invention.
Fig. 2 is the operation principle schematic diagram of abat-vent among Fig. 1.
Abat-vent structure two intentions in Fig. 3 invention.
The operation principle schematic diagram of Fig. 4 Fig. 3 abat-vent.
Fig. 5 installs the schematic diagram of abat-vent structure one scheme for the present invention above the air cooling tubes condenser air duct.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 vertical view of Fig. 6.
Fig. 8 installs the schematic diagram of abat-vent structure two schemes for the present invention above the air cooling tubes condenser air duct.
Fig. 9 is the described scheme air intake passage of a Fig. 8 opening schematic diagram.
Figure 10 is the vertical view of Fig. 9.
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
Air duct air outlet outer 10.1.
(5) specific embodiment
Referring to Fig. 1, abat-vent structure one of the present invention 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 of the present invention, 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 above the air cooling tubes condenser air duct
Referring to Fig. 5, Fig. 5 has provided the schematic diagram that abat-vent structure one scheme is installed above the air cooling tubes condenser air duct.This has the direct air cooled condenser of 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. 5～7, the control-driven system 1 of described abat-vent (structure one) is installed on the air cooling platform 9.Two guide rails and guide rail supporting frame 2 are vertically mounted on the air cooling platform 9 with the rotating shaft 1.2 of control-driven system 1, and the spacing between two guide rails and the guide rail supporting frame 2 is greater than air duct 10 air outlet diameters.When the antifreeze operation of Air-cooled Unit little load in winter, move along guide rail by control-driven system pulling deep bead, the air duct outlet air 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, control-driven 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 above the air cooling tubes condenser air duct
Referring to Fig. 8, Fig. 8 has provided the schematic diagram that abat-vent structure two schemes are installed above the air cooling tubes condenser air duct.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. 8～10, the control-driven system 1 of described abat-vent (structure two) is installed on the air cooling platform 9.Two pull bars and pull bar bracing frame 4 are vertically mounted on the air cooling platform 9 with the rotating shaft 1.2 of control-driven system 1, and the spacing between two pull bars and the pull bar bracing frame 4 is greater than air duct 10 air outlet diameters.When the antifreeze operation of Air-cooled Unit little load in winter, by control-driven system pulling pull bar, it is horizontal that some blades that keep out the wind are all changed into, thereby the air duct outlet air surface between two bracing frames is all covered, and reaches 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 the air cooling blower fan startup, when Air-cooled Unit need be pressed the normal duty operation, control-driven system pulling pull bar, the blade that will keep out the wind all changes into vertical shape, promptly opens the air intake passage (as Fig. 9) of blower fan, guarantees that blower fan system normally moves and the normal heat exchange of 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 (6)
1. an air duct top has the direct air cooled condenser of controlling the 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 duct (10) air intake passage switching is installed in described air duct (10) top, 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 air cooling platform (9), two guide rails and guide rail supporting frame (2) are vertically mounted on the air cooling platform (9) with the rotating shaft (1.2) of control-driven system (1), and the spacing between two guide rails and the guide rail supporting frame (2) is greater than air duct (10) air outlet diameter.
2. an air duct top has the direct air cooled condenser of controlling the 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 duct (10) air intake passage switching is installed in described air duct (10) top, 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 air cooling platform (9), two pull bars and pull bar bracing frame (4) are vertically mounted on the air cooling platform (9) with the rotating shaft (1.2) of control-driven system (1), and the spacing between two pull bars and the pull bar bracing frame (4) is greater than air duct (10) air outlet diameter.
3. a kind of air duct according to claim 1 top has the direct air cooled condenser of control air intake passage switching function, 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.
4. a kind of air duct according to claim 2 top has the direct air cooled condenser of control air intake passage switching function, 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).
5. have the direct air cooled condenser of controlling the air intake passage switching function according to claim 1 or 3 described a kind of air duct tops, it is characterized in that: described deep bead (3) is made by canvas or sheet iron.
6. have the direct air cooled condenser of controlling the air intake passage switching function according to claim 2 or 4 described a kind of air duct tops, 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 |
|---|---|---|---|
| CN2008102350305A CN101419024B (en) | 2008-11-12 | 2008-11-12 | Direct air cooling steam condenser with air intake passage switching control function above wind pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102350305A CN101419024B (en) | 2008-11-12 | 2008-11-12 | Direct air cooling steam condenser with air intake passage switching control function above wind pipe |
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| Publication Number | Publication Date |
|---|---|
| CN101419024A CN101419024A (en) | 2009-04-29 |
| CN101419024B true CN101419024B (en) | 2010-12-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2008102350305A Active CN101419024B (en) | 2008-11-12 | 2008-11-12 | Direct air cooling steam condenser with air intake passage switching control function above wind pipe |
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| CN (1) | CN101419024B (en) |
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| CN101419024A (en) | 2009-04-29 |
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Owner name: SHUANGLIANG ECO-ENERGEY SYSTEMS CO.,LTD. Free format text: FORMER OWNER: SHUANGLIANG AIR CONDITIONING EQUIPMENT CO LTD, JIANGSU Effective date: 20100913 |
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Effective date of registration: 20100913 Address after: 214444 Jiangsu city of Jiangyin Province Li Town Road No. 1 West Applicant after: Shuangliang Energy Saving System Co., Ltd. Address before: 214444 Jiangsu city of Jiangyin Province Li Town Road No. 1 West Applicant before: Shuangliang Air Conditioning Equipment Co., Ltd., Jiangsu |
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