CN102338591B - Automatic deicing device of natural draft cooling tower and deicing method thereof - Google Patents
Automatic deicing device of natural draft cooling tower and deicing method thereof Download PDFInfo
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- CN102338591B CN102338591B CN 201010239369 CN201010239369A CN102338591B CN 102338591 B CN102338591 B CN 102338591B CN 201010239369 CN201010239369 CN 201010239369 CN 201010239369 A CN201010239369 A CN 201010239369A CN 102338591 B CN102338591 B CN 102338591B
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- operated valve
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Abstract
The invention provides an automatic deicing device of a natural draft cooling tower. A circulation water tower supply pipeline is connected with a pipeline pump, the pipeline pump is connected with a deicing header, the deicing header is arranged along a cooling tower; at least one standpipe is arranged on the deicing header, the front end of each standpipe is provided with a deicing pipe, the deicing pipes are arranged along the upper edge of an air inlet of the cooling tower, a spray nozzle is arranged on each deicing pipe, and a water inlet electric valve is arranged between the circulation water tower supply pipeline and the pipeline pump; a deicing pipe electric valve is arranged on each standpipe, the water inlet electric valve, the pipeline pump and the deicing pipe electric valvesare all connected with a PLC (programmable logical controller), wherein an input end of the PLC controller is connected with an electronic thermometer. The invention has the following advantages: 1, with less investment and low operating cost, the cooling tower in a cold region can be prevented from freezing and the safe operation of the unit can be ensured; 2, the running and stop of the deicing device can be automatically controlled, thus the automation level of the power plant can be improved.
Description
Technical field
The present invention relates to a kind of device that has automation ice, is a kind of device that is used for the thermal power plant cooling tower antifreezing.
Background technology
It is a more scabrous problem that the thermal power plant cooling tower freezes; Various aspects such as itself and meteorological condition, the method for operation, antifreeze facility all have relation; Show from the experience of power plant's design for many years, operation; Single antifreezing measures all do not play effect preferably, and the technology of using at present has following several aspect:
Inner peripheral water distribution: during the water distribution system design, consider to realize the inner peripheral water distribution, strengthen peripheral spray density during winter, enclose water distribution in the stoppage in transit, increase the air intake resistance of tower, improve temperature in the tower, play the anti-freeze effect of part.This mode is one of basic ice control, can not prevent fully to freeze.
Antifreeze pipeline: along cooling tower air inlet upper limb, establish circulating line at air duct inwall (or outer wall), on pipeline, open flat hole at a certain distance, can form water curtain winter at the air inlet place, plays to reduce entering tower air capacity, plays the anti-freeze effect of part.The water curtain that this mode forms is very unobvious on anti-icing effect, and investment is bigger.
Shunt valve: directly get into pond of cooling tower picking out shunt valve, make hot water, after circulating water temperature is elevated to 15 ℃, whole recirculated waters are switched on vertical shaft or the anti-frozen pipe without liquid distribution from circulation jellyfish pipe.This mode is one of basic ice control, frequently switches big valve, brings potential safety hazard to operation.
Deep bead: cold season is the suspension deep bead in whole air inlet border, along with temperature, water temperature and wind direction change, and the number of plies of adjustment deep bead, suspension orientation and scope.This mode, investment is high, manually-operated fully, workload is huge.
It is anti-icing that present large cooling column adopts inner peripheral water distribution, shunt valve, deep bead at severe cold area, and cold district adopts inner peripheral water distribution, shunt valve to come anti-icing.It is huge that practice shows that the former invests, complicated operation; The anti-icing weak effect of the latter, severe patient have brought huge ice cube to fall and have blocked the consequence that the cooling tower discharge outlet causes shutdown.
Summary of the invention
For solving the anti-ice problem of cooling tower, the present invention proposes a kind of brand-new winterization system that has the automation ice production apparatus, cooperate inner peripheral water distribution and shunt valve, can solve the ice formation issues of cooling tower effectively, to guarantee the safe operation of power plant.
For realizing above-mentioned purpose, the present invention adopts following technical scheme:
A kind of cooling stack automation ice production apparatus is connecting tubing pump on the tower pipeline on the recirculated water, and the female pipe of tubing pump connectionization ice is changed the female pipe of ice and laid along cooling tower; On the female pipe of describedization ice at least one standpipe is set, the front end setting ice pipe of every standpipe is changed the ice pipe and is installed along cooling tower air inlet upper limb, changes on the ice pipe shower nozzle is set; And the water inlet electrically operated valve is being set between tower pipeline and the tubing pump on the described recirculated water; Setting ice pipe electrically operated valve on every standpipe; Described water inlet electrically operated valve, tubing pump and change ice pipe electrically operated valve all are connected with the PLC controller, and the input of said PLC controller connects electronic thermometer.
Describedization ice pipe is an arc ice pipe.
Be connected with at least one short tube on the arc ice pipe, the end of short tube is a shower nozzle.
Described shower nozzle is the duck shower nozzle.
Be connected with bypass valve on the female pipe of describedization ice, bypass valve communicates with pond of cooling tower.
Between described tubing pump and the female pipe of change ice, also be provided with the second water inlet electrically operated valve.
A kind of cooling stack automation ice method of utilizing above-mentioned thawing apparatus and implementing, it may further comprise the steps:
1. electronic thermometer is implemented to gather environment temperature, and the environment temperature that uses is sent in the PLC controller;
2. the PLC controller compares ambient temperature value that collects and setting value, and when being higher than setting value as if ambient temperature value, the PLC controller is failure to actuate; If when ambient temperature value was lower than setting value, the PLC controller sent control instruction to the electrically operated valve of intaking, tubing pump and change ice pipe electrically operated valve;
3. described water inlet electrically operated valve is opened according to control instruction, and tubing pump starts, and the change ice pipe electrically operated valve that is positioned on the every standpipe is opened in order in succession, and recirculated water penetrates through shower nozzle, melts the small-sized silver thaw of having formed.
4. it also comprise step, and after changing the ice end, the bypass valve on the female pipe of being connected ice is opened, and the water in the standpipe is entered pond of cooling tower.
Adopt the present invention of technique scheme, have the following advantages:
1 is less in investment, under the less situation of running cost, prevented freezing of cold district cooling tower, guaranteed the safe operation of unit.
The operation of 2 Automatic Control thawing apparatus with stop, having improved the automatization level of power plant.
3 through PLC control sequence unlatchingization ice pipe, can significantly reduce the water yield that is used for anti-icingization ice, has reduced the investment of changing the female pipe of ice, changing the ice pipe.
4 through PLC control sequence unlatchingization ice pipe, can significantly reduce the water yield that is used for anti-icingization ice, has reduced the capacity of tubing pump, has practiced thrift operating cost.
Description of drawings
Fig. 1 is overall structure figure of the present invention;
Fig. 2 is the control system diagram among the present invention;
Fig. 3 is a control flow chart of the present invention.
The specific embodiment
Like Fig. 1, shown in Figure 2, on tower pipeline 1 on the recirculated water, connect tubing pump 2, the female pipe 3 of tubing pump 2 connectionization ice; Change the female pipe 3 of ice and around cooling tower, lay, many standpipes 4 are set, the front end setting ice pipe 5 of every standpipe 4 on the female pipe 3 of change ice; Changing ice pipe 5 installs along cooling tower air inlet upper limb; On the change ice pipe 5 shower nozzle 6 can be set directly, also can on change ice pipe 5, be connected with at least one short tube 11, the end of short tube 11 is provided with shower nozzle 6; Shower nozzle 6 is a preferred forms with the duck shower nozzle, and the duck shower nozzle is a technology well known to those of ordinary skill in the art.
Need to prove that above-mentioned change ice pipe 5 is a preferred forms with arc ice pipe; About adjacent standpipe 4 spacing 50m, adjacent short tube 11 spacing 0.5m, and the quantity of standpipe 4 that is provided with and short tube 11 all can set according to the needs of reality, can think five, six or even more a plurality of.
And the present invention is provided with water inlet electrically operated valve 7 between tower pipeline 1 on the recirculated water and tubing pump 2, between tubing pump 2 and the female pipe 3 of change ice, also is provided with the second water inlet electrically operated valve 13.And setting ice pipe electrically operated valve 8 on every standpipe 4, wherein, water inlet electrically operated valve 7, the second water inlet electrically operated valve 13, tubing pump 2 and change ice pipe electrically operated valve 8 all are connected with PLC controller 9, and the input of PLC controller 9 connects electronic thermometer 10.
Simultaneously, the present invention is connected with bypass valve 12 on the female pipe 3 of change ice, and bypass valve 12 communicates with pond of cooling tower.Like this, after the present invention stops transport, can open bypass valve 12 automatically, and the water in the standpipe 4 is entered pond of cooling tower automatically.
Operation principle of the present invention is:
Introduction pipe on the tower pipeline 1 boosts through tubing pump 2 from the cooling-tower circulating water, and the recirculated water after boosting is transported in the standpipe 4 through changing the female pipe 3 of ice, and final recirculated water penetrates through shower nozzle 6, melts the small-sized silver thaw of having formed.Through programme-control, the change ice pipe around the cooling tower can penetrate current in proper order, has reduced change frozen water amount, has saved the bore of the female pipeline of bottom ice and the bore of top ice pipe, has also reduced pressure demand, and investment economizes.
As shown in Figure 3, a kind of cooling stack automation ice method of utilizing above-mentioned thawing apparatus and implementing, it may further comprise the steps:
1. electronic thermometer 10 is implemented to gather environment temperature, and the environment temperature that uses is sent in the PLC controller 9;
2. PLC controller 9 compares ambient temperature value that collects and setting value, and when being higher than setting value as if ambient temperature value, PLC controller 9 is failure to actuate; When if ambient temperature value is lower than setting value, PLC controller 9 sends control instruction to the electrically operated valve 7 of intaking, tubing pump 2 and changes ice pipe electrically operated valve 8;
3. described water inlet electrically operated valve 7 is opened according to control instruction; Tubing pump 2 starts, and the change ice pipe electrically operated valve 8 that is positioned on the every standpipe 4 is opened in order in succession, and recirculated water penetrates through shower nozzle 6; Melt the small-sized silver thaw of having formed, reach the purpose that prevents that cooling tower from freezing.In addition, be connected with bypass valve 12, then after the present invention stops transport, open bypass valve 12 automatically, the water in the standpipe 4 is entered pond of cooling tower automatically if change on the female pipe 3 of ice.
Need to prove; Step 3. in, change ice pipe electrically operated valve 8 and open in succession in order and be meant: after first is changed ice pipe electrically operated valve 8 and opens, postpone to close after 5-10 minute; Then change the 8 unlatching back delays of ice pipe electrically operated valve for second, change ice pipe electrically operated valve 8 until last and close.Can decide above-mentioned time delay according to the weather of locality and the degree of freezing, and can be in 5 minutes, 6 minutes, 7 minutes, 8 minutes, 9 minutes, 10 minutes any one.
Claims (3)
1. cooling stack automation ice method of utilizing cooling stack automation ice production apparatus and implementing; Wherein this device is specially: tower pipeline (1) is gone up and is connected tubing pump (2) on recirculated water; The female pipe of tubing pump (2) connectionization ice (3) is changed the female pipe of ice (3) and is laid along cooling tower; On the female pipe of describedization ice (3) at least one standpipe (4) is set, the front end setting ice pipe (5) of every standpipe (4) is changed ice pipe (5) and is installed along cooling tower air inlet upper limb, changes on the ice pipe (5) shower nozzle (6) is set; And water inlet electrically operated valve (7) is set between tower pipeline (1) on the described recirculated water and tubing pump (2); Setting ice pipe electrically operated valve (8) on every standpipe (4); Described water inlet electrically operated valve (7), tubing pump (2) and change ice pipe electrically operated valve (8) all are connected with PLC controller (9); The input of said PLC controller (9) connects electronic thermometer (10), it is characterized in that this method may further comprise the steps:
1. electronic thermometer (10) is implemented to gather environment temperature, and the environment temperature that collects is sent in the PLC controller (9);
2. PLC controller (9) compares ambient temperature value that collects and setting value, and when being higher than setting value as if ambient temperature value, PLC controller (9) is failure to actuate; When if ambient temperature value is lower than setting value, PLC controller (9) sends control instruction to the electrically operated valve of intaking (7), tubing pump (2) and changes ice pipe electrically operated valve (8);
3. described water inlet electrically operated valve (7) is opened according to control instruction, and tubing pump (2) starts, and the change ice pipe electrically operated valve (8) that is positioned on the every standpipe (4) is opened in order in succession, and recirculated water penetrates through shower nozzle (6), melts the small-sized silver thaw of having formed.
2. cooling stack automation ice method according to claim 1; It is characterized in that: step 3. in; Describedization ice pipe electrically operated valve (8) is opened in succession in order and is meant: after first changes ice pipe electrically operated valve (8) unlatching; Postpone to close after 5-10 minute, then change ice pipe electrically operated valve (8) unlatching back delay for second, change ice pipe electrically operated valve (8) until last and close.
3. cooling stack automation ice method according to claim 1 and 2; It is characterized in that: 4. it also comprise step; After changing the ice end, the bypass valve (12) on the female pipe of being connected ice (3) is opened, and the water in the standpipe (4) is entered pond of cooling tower.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010239369 CN102338591B (en) | 2010-07-29 | 2010-07-29 | Automatic deicing device of natural draft cooling tower and deicing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010239369 CN102338591B (en) | 2010-07-29 | 2010-07-29 | Automatic deicing device of natural draft cooling tower and deicing method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102338591A CN102338591A (en) | 2012-02-01 |
| CN102338591B true CN102338591B (en) | 2012-12-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010239369 Expired - Fee Related CN102338591B (en) | 2010-07-29 | 2010-07-29 | Automatic deicing device of natural draft cooling tower and deicing method thereof |
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| Country | Link |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1136839A (en) * | 1994-09-07 | 1996-11-27 | 法国电气公司 | Wet air cooling tower comprising anti-freeze device |
| CN200946990Y (en) * | 2006-08-09 | 2007-09-12 | 周自平 | Cooling tower with antifreezing function |
| CN101762206A (en) * | 2009-12-29 | 2010-06-30 | 中冶南方工程技术有限公司 | Automatic deicing control method of cooling tower fan |
| CN201740452U (en) * | 2010-07-29 | 2011-02-09 | 河南省电力勘测设计院 | Automatic thawing device of natural ventilation cooling tower |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003194482A (en) * | 2001-12-25 | 2003-07-09 | Jfe Engineering Kk | Air-cooled steam condenser |
-
2010
- 2010-07-29 CN CN 201010239369 patent/CN102338591B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1136839A (en) * | 1994-09-07 | 1996-11-27 | 法国电气公司 | Wet air cooling tower comprising anti-freeze device |
| CN200946990Y (en) * | 2006-08-09 | 2007-09-12 | 周自平 | Cooling tower with antifreezing function |
| CN101762206A (en) * | 2009-12-29 | 2010-06-30 | 中冶南方工程技术有限公司 | Automatic deicing control method of cooling tower fan |
| CN201740452U (en) * | 2010-07-29 | 2011-02-09 | 河南省电力勘测设计院 | Automatic thawing device of natural ventilation cooling tower |
Non-Patent Citations (1)
| Title |
|---|
| JP特開2003-194482A 2003.07.09 |
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| CN102338591A (en) | 2012-02-01 |
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Address after: No. 212 zhongzhongxi Road, Zhengzhou, Henan Province, 450007 Co-patentee after: Qiu Cheng Patentee after: China Electric Power Construction Group Henan electric survey and Design Institute Co., Ltd. Address before: No. 212 zhongzhongxi Road, Zhengzhou, Henan Province, 450007 Co-patentee before: Qiu Cheng Patentee before: Hennan Electric Power Survey & Design Institute |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121212 Termination date: 20190729 |