CN202092508U - On-line monitoring system for direct air cooling platform temperature field - Google Patents
On-line monitoring system for direct air cooling platform temperature field Download PDFInfo
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- CN202092508U CN202092508U CN2011201919034U CN201120191903U CN202092508U CN 202092508 U CN202092508 U CN 202092508U CN 2011201919034 U CN2011201919034 U CN 2011201919034U CN 201120191903 U CN201120191903 U CN 201120191903U CN 202092508 U CN202092508 U CN 202092508U
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Abstract
An on-line monitoring system for a direct air cooling platform temperature field comprises bus temperature sensors, bus cables and bus controllers, wherein the bus temperature sensors are arranged at inlets of air cooling radiator units of air cooling radiators, and are connected with one of the bus controllers via one of the bus cable; and at least one bus temperature sensor is arranged at outlets of the air cooling radiator units of the air cooling radiators, and is connected with one of the bus controllers via at least one bus cable. The on-line monitoring system provided by the utility model has the advantages that the dust accumulation severity of the air cooling radiators can be timely judged, the optimized cleaning scheme can be formulated, the occurrence of hot air recirculation is monitored in advance and the recirculation ratio is calculated ahead of time, and the economy and the safety of the air cooling operation are improved.
Description
Technical field
The utility model relates to a kind of online monitoring system, particularly relates to a kind of online monitoring system that is applicable to thermal power plant's direct air cooling system air cooling platform.
Background technology
Thermal power plant's Direct Air-cooled Unit obtains in the north widely applying in recent years, and single-machine capacity also develops into 600,000 kilowatts from several ten thousand kilowatts, even a gigawatt, has accumulated valuable operation experiences in the engineering practice, and the control technology of air cooling system is increasingly mature.
But according to the ruuning situation of present Direct Air-cooled Unit, the operation of direct air cooling system control also has many outstanding technical problems to need to be resolved hurrily.The air cooling heat radiator out temperature in Direct Air-Cooled power plant is not measured.Though air cooling heat radiator is huge, complicated, but it is a heat exchanger after all, theory, heat-transfer mechanism according to heat exchanger, the measurement of cold and hot fluid out temperature is the basis of heat exchanger operation, adjustment, heat exchange effect assessment, do not have these data, the evaluation of heat exchanger operational effect can only be to estimate according to further feature.Though thermal power plant's Direct Air-cooled Unit has accumulated a cover experience through groping for many years at present, makes production management normally to move.But can not monitor the change of temperature field of air cooling platform in real time, then can not in time carry out antifreeze, the air cooling heat radiator superficial dust monitoring of air cooling heat radiator and improve unit the kurtosis summer ability of meeting, solve big wind effect and hot air reflux causes unit tripping problem etc.These problems can not be properly settled, and will have a strong impact on the security and the economy of air cooling system operation.So the air cooling heat radiator out temperature is implemented monitoring to be very important.
The utility model content
The purpose of this utility model is to provide a kind of field bus technique FCS that utilizes to prevent that air cooling heat radiator adverse current tube bank from freezing, in time monitoring air cooling heat radiator superficial dust degree and real-time judge hot air reflux, thereby improves the security of unit operation and the Direct Air-Cooled platform temperature field online monitoring system of economy.
The purpose of this utility model is implemented by following technical scheme, a kind of Direct Air-Cooled platform temperature field online monitoring system, it comprises the bus type temperature sensor, bus cable and bus control unit, wherein be provided with a described bus type temperature sensor in each air cooling heat radiator unit inlet of air cooling heat radiator, be provided with at least one described bus type temperature sensor in each exit, air cooling heat radiator unit of air cooling heat radiator, wherein the described bus type temperature sensor at each air cooling heat radiator unit inlet place of air cooling heat radiator is connected with described bus control unit by a described bus cable, and the described bus type temperature sensor in each exit, air cooling heat radiator unit of air cooling heat radiator is connected with described bus control unit by other at least one described bus cable.Be that described bus type temperature sensor is measured each air cooling heat radiator unit turnover of air cooling heat radiator, mouthful air themperature respectively, then by described bus cable with temperature data uploading to described bus control unit, form Direct Air-Cooled platform temperature field by each air cooling heat radiator unit import and export air real time temperature, the temperature field data are analyzed, handled by described bus control unit software.
Described bus type temperature sensor adopts the field bus communication agreement of standard, is exclusively used in the outside air temperature measured sensor.
Described bus cable adopts the Shielded Twisted Pair copper core cable or adopts optical fiber.
Described optical fiber adopts multimode fibre or single-mode fiber.
Described bus control unit is the DPU of Direct Air-Cooled control system DCS, built-in bus protocol chip or add the bus protocol communication module.
When the bus protocol of bus type temperature sensor and bus control unit not simultaneously, connect on the described bus cable of described bus type temperature sensor and described bus control unit and also be provided with protocol converter.
Advantage of the present utility model is: 1, utilize the air cooling platform temperature field data computation that records to go out the best temperature rise value and the vacuum values of Air-cooled Unit or air cooling heat radiator unit, for operation adjustment provides foundation, realize the air cooling blower fan energy-saving run; 2, utilize air cooling platform temperature field data computation to go out the end difference of Air-cooled Unit or local air cooling heat radiator unit,, formulate optimized cleaning program according to the dust stratification order of severity of each unit side difference situation of change judgement air cooling heat radiator; 3, can judge whether to have taken place hot air reflux and hot air reflux rate size thereof by air cooling platform temperature field data, in time grasp the flow field and change.Particularly the calculating of hot air reflux rate can shift to an earlier date the order of severity of reacting the hot air reflux generation quantitatively, on DCS, report to the police, in time remind the operations staff before having influence on steam turbine operation, in time to make a response, intervene in advance, carry out foreseeability and regulate, avoid shutting down, the generation of security incidents such as blowing out or removal of load; 4, northern area cold in winter, indivedual air cooling heat radiators part of causing easily in service freezes.Can predict in advance that according to the real time data in air cooling platform temperature field where organizing air cooling heat radiator exists the possibility of freezing, and to take corresponding antifreeze control and regulation measure, stops transport adverse current blower fan reversing etc. as air cooling blower fan; 5, in the Direct Air-Cooled robot control system(RCS) setting value of back pressure normally by the load of unit and environment temperature decision.But the setting value of back pressure can not fully be reacted the influence of air cooling platform change of temperature field to the unit back pressure among the conventional DCS, can optimize the back pressure set value of DCS control system according to the real time data in air cooling platform temperature field; 6, regulate corresponding frequency conversion fan rotating speed according to the out temperature variation tendency of every group of air cooling heat radiator unit; To satisfy the back pressure set value better; When 7, normally moved winter, the upper end in adverse current air cooling heat radiator tube bank may frosting (water vapour becomes the loose ice particle that forms when solid-state), and this is that surfusion appears in the condensable material existence owing to this position has not.If this situation continues for some time, may cause the upper end in the tube bank of adverse current air cooling heat radiator to be stopped up gradually, hinder the not extraction of condensable material.Utilize the real time data in air cooling platform temperature field to optimize the improvements program of adverse current air cooling heat radiator tube bank, with prevent can not condensate appearance, prevent that the air cooling heat radiator tube bank from freezing.
Description of drawings
Fig. 1 is the Direct Air-Cooled temperature field online monitoring system schematic diagram of a row air cooling heat radiator in the 300MW Direct Air-cooled Unit of bus type temperature sensor employing PROFIBUS-DP bussing technique.
Fig. 2 is the Direct Air-Cooled temperature field online monitoring system schematic diagram of a row air cooling heat radiator in the 300MW Direct Air-cooled Unit of bus type temperature sensor employing PROFIBUS-PA bussing technique.
Air cooling heat radiator unit 1, air cooling heat radiator 2, air cooling heat radiator unit outlet 3, air cooling heat radiator unit inlet 4, bus type temperature sensor 5, bus cable 6, DCS bus control unit 7, DP PA linker 8.
The specific embodiment
Embodiment 1: be the concrete arrangement of example explanation Direct Air-Cooled platform temperature field online monitoring system with the 300MW Direct Air-cooled Unit.Every 300MW Direct Air-cooled Unit is totally 6 row air cooling heat radiators 2, and every row air cooling heat radiator 2 is totally 5 air cooling heat radiator unit 1.
A kind of Direct Air-Cooled platform temperature field online monitoring system, it comprises bus type temperature sensor 5, bus cable 6 and DCS bus control unit 7, each air cooling heat radiator unit inlet 4 at every row air cooling heat radiator 2 is provided with 1 bus type temperature sensor 5, export 3 left sides in each air cooling heat radiator unit of every row air cooling heat radiator 2 and be provided with 1 bus type temperature sensor 5, export 3 right sides in each air cooling heat radiator unit of every row air cooling heat radiator 2 and be provided with 1 bus type temperature sensor 5, wherein, bus type temperature sensor 5 at each air cooling heat radiator unit inlet 4 place of every row air cooling heat radiator 2 is connected with DCS bus control unit 7 by import department's bus cable 6, the bus type temperature sensor 5 that exports 3 right sides in each air cooling heat radiator unit of every row air cooling heat radiator 2 is connected with DCS bus control unit 7 by an outlet right side bus cable 6, and the bus type temperature sensor 5 that exports 3 left sides in each air cooling heat radiator unit of every row air cooling heat radiator 2 is connected with DCS bus control unit 7 by an outlet left side bus cable 6.
Like this, 6,1 300MW Direct Air-cooled Unit of every row air cooling heat radiator 2 three bus cables of needs need 18 bus cables 6 altogether.
The bus type temperature sensor 5 of each air cooling heat radiator unit inlet and outlet left and right sides is measured each air cooling heat radiator unit import and export air themperature respectively, then by bus cable 6 with temperature data uploading to DCS bus control unit 7, form Direct Air-Cooled platform temperature field by each air cooling heat radiator unit import and export air real time temperature, the temperature field data are analyzed, handled by DCS bus control unit software.
Bus type temperature sensor 5 adopts the field bus communication agreement-PROFIBUS-DP bussing technique of standard.
DCS bus control unit 7 is the DPU of Direct Air-Cooled control system DCS, and built-in bus protocol chip adopts the PROFIBUS-DP bussing technique.
Bus type temperature sensor 5 is identical with the bus protocol of DCS bus control unit 7, and bus cable 6 is directly connected on the DCS bus control unit 7.
Embodiment 2: be the concrete arrangement of example explanation Direct Air-Cooled temperature field online monitoring system with the 300MW Direct Air-cooled Unit.Every 300MW Direct Air-cooled Unit is totally 6 row air cooling heat radiators 2, and every row air cooling heat radiator 2 is totally 5 air cooling heat radiator unit 1.
A kind of Direct Air-Cooled platform temperature field online monitoring system, it comprises bus type temperature sensor 5, bus cable 6 and DCS bus control unit 7, each air cooling heat radiator unit inlet 4 at every row air cooling heat radiator 2 is provided with 1 bus type temperature sensor 5, export 3 right sides in each air cooling heat radiator unit of every row air cooling heat radiator 2 and be provided with 1 bus type temperature sensor 5, wherein, bus type temperature sensor 5 at each air cooling heat radiator unit inlet 4 place of every row air cooling heat radiator 2 is connected with DCS bus control unit 7 by import department's bus cable 6, the bus type temperature sensor 5 that exports 3 right sides in each air cooling heat radiator unit of every row air cooling heat radiator 2 is connected with DCS bus control unit 7 by an outlet right side bus cable 6, import department's bus cable 6 with export right side bus cable 6 be provided with DP PA linker 10.
Like this, every row air cooling heat radiator 2 need 6,1 300MW Direct Air-cooled Unit of two bus cables need altogether 6, six DP of 12 bus cables PA linker 10.
The bus type temperature sensor 5 on each air cooling heat radiator unit inlet and outlet right side is measured each air cooling heat radiator unit import and export air themperature respectively, then by bus cable 6 with temperature data uploading to DCS bus control unit 7, form Direct Air-Cooled platform temperature field by each air cooling heat radiator unit import and export air real time temperature, the temperature field data are analyzed, handled by DCS bus control unit software.
Bus type temperature sensor 5 adopts the PROFIBUS-PA bussing techniques, by DP PA linker 10 convert the PROFIBUS-DP bussing technique to, adopt then bus cable 6 with data upload to DCS bus control unit 7.
DCS bus control unit 7 is the DPU of Direct Air-Cooled control system DCS, and built-in bus protocol chip adopts the PROFIBUS-DP bussing technique.
Claims (6)
1. Direct Air-Cooled platform temperature field online monitoring system, it is characterized in that, it comprises the bus type temperature sensor, bus cable and bus control unit, wherein be provided with a described bus type temperature sensor in each air cooling heat radiator unit inlet of air cooling heat radiator, be provided with at least one described bus type temperature sensor in each exit, air cooling heat radiator unit of air cooling heat radiator, wherein the described bus type temperature sensor at each air cooling heat radiator unit inlet place of air cooling heat radiator is connected with described bus control unit by a described bus cable, and the described bus type temperature sensor in each exit, air cooling heat radiator unit of air cooling heat radiator is connected with described bus control unit by other at least one described bus cable.
2. a kind of Direct Air-Cooled platform temperature according to claim 1 field online monitoring system is characterized in that, described bus type temperature sensor adopts the field bus communication agreement of standard, is exclusively used in the outside air temperature measured sensor.
3. a kind of Direct Air-Cooled platform temperature according to claim 1 field online monitoring system is characterized in that, described bus cable adopts the Shielded Twisted Pair copper core cable or adopts optical fiber.
4. a kind of Direct Air-Cooled platform temperature according to claim 3 field online monitoring system is characterized in that, described optical fiber adopts multimode fibre or single-mode fiber.
5. a kind of Direct Air-Cooled platform temperature according to claim 1 field online monitoring system is characterized in that described bus control unit is the DPU of Direct Air-Cooled control system DCS, built-in bus protocol chip or add the bus protocol communication module.
6. according to any described a kind of Direct Air-Cooled platform temperature field of claim 1-5 online monitoring system, it is characterized in that, when the bus protocol of bus type temperature sensor and bus control unit not simultaneously, connect on the described bus cable of described bus type temperature sensor and described bus control unit and also be provided with protocol converter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201919034U CN202092508U (en) | 2011-05-31 | 2011-05-31 | On-line monitoring system for direct air cooling platform temperature field |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201919034U CN202092508U (en) | 2011-05-31 | 2011-05-31 | On-line monitoring system for direct air cooling platform temperature field |
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| CN2011201919034U Expired - Fee Related CN202092508U (en) | 2011-05-31 | 2011-05-31 | On-line monitoring system for direct air cooling platform temperature field |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103940257A (en) * | 2014-03-21 | 2014-07-23 | 中科诺维(北京)科技有限公司 | Temperature control system of air cooling condenser |
| CN104296593A (en) * | 2014-07-11 | 2015-01-21 | 大唐阳城发电有限责任公司 | Calculation method, judgment method and system for cleanliness of air cooling heat sink |
| CN108362136A (en) * | 2018-01-30 | 2018-08-03 | 华北电力科学研究院有限责任公司 | A kind of air cooling system control method and equipment |
| CN111957637A (en) * | 2020-07-16 | 2020-11-20 | 中国神华能源股份有限公司国华电力分公司 | Flushing method, flushing device and flushing system |
-
2011
- 2011-05-31 CN CN2011201919034U patent/CN202092508U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103940257A (en) * | 2014-03-21 | 2014-07-23 | 中科诺维(北京)科技有限公司 | Temperature control system of air cooling condenser |
| CN103940257B (en) * | 2014-03-21 | 2015-12-30 | 中科诺维(北京)科技有限公司 | Air-cooling island temperature control system |
| CN104296593A (en) * | 2014-07-11 | 2015-01-21 | 大唐阳城发电有限责任公司 | Calculation method, judgment method and system for cleanliness of air cooling heat sink |
| CN108362136A (en) * | 2018-01-30 | 2018-08-03 | 华北电力科学研究院有限责任公司 | A kind of air cooling system control method and equipment |
| CN111957637A (en) * | 2020-07-16 | 2020-11-20 | 中国神华能源股份有限公司国华电力分公司 | Flushing method, flushing device and flushing system |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: INNER MONGOLIA ELECTRIC POWER SURVEY DESIGN INSTIT Free format text: FORMER NAME: INNER MONGOLIA ELECTRICAL POWER INVESTIGATE AND DESIGN INSTITUTE |
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| CP01 | Change in the name or title of a patent holder |
Address after: 010020 the Inner Mongolia Autonomous Region Hohhot City Xilin Road No. 209 Patentee after: INNER MONGOLIA ELECTRIC POWER SURVEY & DESIGN INSTITUTE CO., LTD. Address before: 010020 the Inner Mongolia Autonomous Region Hohhot City Xilin Road No. 209 Patentee before: Inner Mongolia Electric Power Survey Design Institute |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111228 Termination date: 20200531 |
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| CF01 | Termination of patent right due to non-payment of annual fee |