CN103994678A - Direct air cooling unit capable of preventing tube bundles from being frozen and effectively removing accumulated dust - Google Patents
Direct air cooling unit capable of preventing tube bundles from being frozen and effectively removing accumulated dust Download PDFInfo
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- CN103994678A CN103994678A CN201410249795.XA CN201410249795A CN103994678A CN 103994678 A CN103994678 A CN 103994678A CN 201410249795 A CN201410249795 A CN 201410249795A CN 103994678 A CN103994678 A CN 103994678A
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- support
- tube bundles
- heat transmission
- flow heat
- tube bank
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Abstract
The invention relates to a direct air cooling unit capable of preventing tube bundles from being frozen and effectively removing accumulated dust, and belongs to the technical field of energy and power. The direct air cooling unit comprises a steam inlet, spray pipes, spray nozzles, a heating device and the like. The steam inlet is formed in the top end of a support and connected with the direct flow heat transmission tube bundles and the back flow heat transmission tube bundles. The direct flow heat transmission tube bundles are arranged in the middle of the support, and the back flow heat transmission tube bundles are arranged on the two sides of the support. Condensate headers are arranged at the bottom end of the support and connected with the direct flow heat transmission tube bundles and the back flow heat transmission tube bundles. The heating device is fixed onto the back flow heat transmission tube bundles, the spray pipes are fixedly connected to the lower portion of the support, the spray nozzles are arranged on the spray pipes, and the spray pipes on the lower portion of the support and the spray nozzles can clean gaps between the tube bundles to prevent sand and dust from accumulating between the bundles; in the environment of severe winter, the heating device can be used for heating the back flow heat transmission tube bundles to prevent non-condensable gas mass regions in the back flow heat transmission tube bundles from becoming cold gradually, and therefore the problems that the non-condensable gas mass regions are too cold and freezing is caused are avoided.
Description
Technical field
The invention belongs to energy source and power technical field, relate in particular to a kind of Direct Air-cooled Unit of freezing and effectively removing dust stratification that prevents from restraining.
Background technology
Air cooling technique is extensive as the water-deficient area development of the rich coal of northern China, the key technology of high parameter coal fired power generation unit, under the support energetically of national relevant policies, has obtained development rapidly.Direct air cooled condenser adopts air to replace water to turbine discharge, to carry out cooling as cooling medium, therefore environmental change meeting significantly affects the operation characteristic of direct air cooling system, in western China, the dust and sand weather frequency of occurrences is high, easily cause air cooling tube bank dust stratification, and the weather of winter severe cold may make air cooling system occur tube bank bursting by freezing phenomenon.The problems referred to above are all the direct air cooling system problems that may occur in service, if can not solve in time, will affect unit safety operation.
Direct Air-cooled Unit is in the past comprised of steam-distributing pipe, following current unit, adverse current unit, solidifying water manifold, pumped vacuum systems and condensate line, and concurrent-countercurrent tube bank is centralized arrangement respectively, forms suitable, the adverse current fan unit concentrated.Water vapour enters following current by steam-distributing pipe distribution and restrains, after heat exchange, the solidifying water manifold of most of steam condensation Cheng Shuijing is discharged by condensate line, remaining steam enters adverse current tube bank, and water recovery is discharged by condensate line by solidifying water manifold, and on-condensible gas is discharged by vacuum system.But when unit operation, because heating surface bank is respectively managed steam flow maldistribution, each fan unit air quantity skewness, fan unit middle part air quantity is large, the reasons such as partition wall place, both sides air quantity is little, the driving force of heat transfer of each fan unit middle part heat-transfer pipe is strengthened, steam flow is increased, cause velocity in pipes to increase, make to conduct heat and strengthen, and the steam flow of several adverse current tube banks of limit row reduces, velocity in pipes reduces, coordinate pipe outer because air quantity is little, and form convolution eddy current in the tube bank of blower fan partition wall corner, the energy loss that causes air-supply, the reduction that is accompanied by wind speed declines heat-transfer effect, the quantity of steam condensing in pipe declines, and cause the incoagulable gas being mingled with in steam to gather, further variation makes to conduct heat, the Pressure Drop of limit row's several tubes is larger than middle heat-transfer pipe, in limit comb several tubes Lower Half, form low-pressure area, on-condensible gas is in this local gathering, and it is basically identical in solidifying water manifold internal pressure, cause again uncooled part steam in intervalve to blow back into limit comb several tubes, incoagulable gas is mixed between two strands of steam and cannot gets rid of like this, at northern area, because environment temperature is very low, the condensate water of limit comb several tubes top condensation will be cooled to cold gradually while flowing through these cold incoagulable gas group regions that lack steam, As time goes on will freeze, finally cause circulation passage in pipe to stop up, when serious, will cause tube bank bursting by freezing, consequence is serious, and above-mentioned Direct Air-cooled Unit can not solve dust stratification problem between tube bank and tube bank.
Summary of the invention
In order to solve the problems of the technologies described above, the invention provides a kind of Direct Air-cooled Unit of freezing and effectively removing dust stratification that prevents from restraining, comprise steam inlet, following current heating surface bank, countercurrent heat-transfer tube bank, solidifying water manifold, blower fan, jet pipe, nozzle, heater, support, steam inlet, solidifying water manifold, following current heating surface bank and countercurrent heat-transfer tube bank are fixed on support, steam inlet is located at cantilever tip, and tube bank is connected with countercurrent heat-transfer with following current heating surface bank, following current heating surface bank is located at support centre position, countercurrent heat-transfer tube bank is located at position, support both sides, solidifying water manifold is located at support bottom, and tube bank is connected with countercurrent heat-transfer with following current heating surface bank, heater is fixed in countercurrent heat-transfer tube bank, heater is entwined around countercurrent heat-transfer tube bank by a resistance wire, the outer wrap insulate body of resistance wire, jet pipe is fixedly connected under support, jet pipe is provided with several nozzles, blower fan is located under support.
Beneficial effect of the present invention is: the jet pipe that support below arranges can clean tube bank and the gap between tube bank with nozzle, effectively prevents the fouling phenomenon that occurs when many because of dust and sand weather, the carrying out smoothly of assurance heat transfer; Under severe winter environment, the upper heater arranging of countercurrent heat-transfer tube bank, can prevent that in countercurrent heat-transfer tube bank, freeze in incoagulable gas region to countercurrent heat-transfer tube bank heating, and pipeline is resulted in blockage.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is part-structure schematic diagram of the present invention.
The specific embodiment
Below in conjunction with accompanying drawing, the present invention will be further described:
In figure, 1, steam inlet, 2, following current heating surface bank, 3, countercurrent heat-transfer tube bank, 4, solidifying water manifold, 5, blower fan, 6, jet pipe, 7, nozzle, 8, heater, 9, support.
As Fig. 1, shown in Fig. 2, steam inlet 1, solidifying water manifold 4, following current heating surface bank 2 and countercurrent heat-transfer tube bank 3 are fixed on support 9, steam inlet 1 is located at support 9 tops and is connected with countercurrent heat-transfer tube bank 3 with following current heating surface bank 2, following current heating surface bank 2 is located at support 9 centre positions, countercurrent heat-transfer tube bank 3 is located at support 9 positions, both sides, solidifying water manifold 4 is located at support 9 bottoms and is connected with countercurrent heat-transfer tube bank 3 with following current heating surface bank 2, heater 8 is fixed in countercurrent heat-transfer tube bank 3, heater 8 is entwined around countercurrent heat-transfer tube bank 3 by a resistance wire, outer wrap insulate body, jet pipe 6 is fixedly connected on support 9 times, jet pipe 6 is provided with several nozzles 7, blower fan 5 is located at support 9 times.
When Direct Air-cooled Unit is worked, water vapour is distributed and is entered following current heating surface bank 2 by steam inlet 1, after heat exchange, the solidifying water manifold 4 of most of steam condensation Cheng Shuijing is discharged, remaining incoagulable gas enters countercurrent heat-transfer tube bank 3, and countercurrent heat-transfer tube bank 3 arranges heater 8 and can effectively prevent that countercurrent heat-transfer from restraining and when the condensate water of 3 top condensations flows through incoagulable gas group region, freeze phenomenon; It is clean that the setting of jet pipe 6 and nozzle 7 will be carried out injection water to the gap between tube bank, while preventing that sand and dust are more, between making tube bank and restraining, results in blockage, cause air drag to increase, heat transfer deterioration, has guaranteed no-sundries, dust stratification between tube bank and tube bank, and unit is normally moved.
By embodiment, to of the present invention, have been described in detail above, but described content is only preferred embodiment of the present invention, can not be considered to for limiting practical range of the present invention.All equalization variations of doing according to the present patent application scope and improvement etc., within all should still belonging to patent covering scope of the present invention.
Claims (1)
1. one kind prevents from restraining the Direct Air-cooled Unit of freezing and effectively remove dust stratification, comprise steam inlet (1), following current heating surface bank (2), countercurrent heat-transfer tube bank (3), solidifying water manifold (4), blower fan (5), support (9), steam inlet (1), solidifying water manifold (4), following current heating surface bank (2) and countercurrent heat-transfer tube bank (3) are fixed on support (9), described steam inlet (1) is located at support (9) top and is connected with countercurrent heat-transfer tube bank (3) with following current heating surface bank (2), described following current heating surface bank (2) is located at support (9) centre position, described countercurrent heat-transfer tube bank (3) is located at support (9) position, both sides, described solidifying water manifold (4) is located at support (9) bottom and is connected with countercurrent heat-transfer tube bank (3) with following current heating surface bank (2), described blower fan (5) is located under support (9), it is characterized in that: described heater (8) is fixed in countercurrent heat-transfer tube bank (3), heater (8) is entwined around countercurrent heat-transfer tube bank (3) by a resistance wire, the outer wrap insulate body of resistance wire, described jet pipe (6) is fixedly connected under support (9), jet pipe (6) is provided with several nozzles (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410249795.XA CN103994678A (en) | 2014-06-07 | 2014-06-07 | Direct air cooling unit capable of preventing tube bundles from being frozen and effectively removing accumulated dust |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410249795.XA CN103994678A (en) | 2014-06-07 | 2014-06-07 | Direct air cooling unit capable of preventing tube bundles from being frozen and effectively removing accumulated dust |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103994678A true CN103994678A (en) | 2014-08-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410249795.XA Pending CN103994678A (en) | 2014-06-07 | 2014-06-07 | Direct air cooling unit capable of preventing tube bundles from being frozen and effectively removing accumulated dust |
Country Status (1)
| Country | Link |
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| CN (1) | CN103994678A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108645238A (en) * | 2018-07-03 | 2018-10-12 | 江苏中伟机械制造有限公司 | Condensed water active retracting device |
| CN111397389A (en) * | 2020-03-20 | 2020-07-10 | 太原理工大学 | Prevent frozen direct air cooling system of power plant of tube bank |
| CN111406003A (en) * | 2017-11-28 | 2020-07-10 | 株式会社电装 | Air conditioner for seat |
-
2014
- 2014-06-07 CN CN201410249795.XA patent/CN103994678A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111406003A (en) * | 2017-11-28 | 2020-07-10 | 株式会社电装 | Air conditioner for seat |
| CN108645238A (en) * | 2018-07-03 | 2018-10-12 | 江苏中伟机械制造有限公司 | Condensed water active retracting device |
| CN111397389A (en) * | 2020-03-20 | 2020-07-10 | 太原理工大学 | Prevent frozen direct air cooling system of power plant of tube bank |
| CN111397389B (en) * | 2020-03-20 | 2021-07-27 | 太原理工大学 | Prevent frozen direct air cooling system of power plant of tube bank |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140820 |
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| WD01 | Invention patent application deemed withdrawn after publication |