CN112731991A - Power station water pipeline temperature control method - Google Patents
Power station water pipeline temperature control method Download PDFInfo
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- CN112731991A CN112731991A CN202011478265.4A CN202011478265A CN112731991A CN 112731991 A CN112731991 A CN 112731991A CN 202011478265 A CN202011478265 A CN 202011478265A CN 112731991 A CN112731991 A CN 112731991A
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- pipeline
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- electric heating
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/19—Control of temperature characterised by the use of electric means
- G05D23/30—Automatic controllers with an auxiliary heating device affecting the sensing element, e.g. for anticipating change of temperature
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L53/00—Heating of pipes or pipe systems; Cooling of pipes or pipe systems
- F16L53/30—Heating of pipes or pipe systems
- F16L53/35—Ohmic-resistance heating
- F16L53/38—Ohmic-resistance heating using elongate electric heating elements, e.g. wires or ribbons
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K11/00—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00
- G01K11/32—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using changes in transmittance, scattering or luminescence in optical fibres
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Automation & Control Theory (AREA)
- Pipe Accessories (AREA)
Abstract
The invention discloses a temperature control method for a water conveying pipeline of a power station, which comprises the following steps: carrying out temperature data monitoring and acquisition on the water pipeline periodically by using a distributed temperature monitoring mode, and counting the acquired temperature data to obtain the current temperature of the pipeline; inquiring the electric heating band-pass and power-off state of the pipeline: when the pipeline electric heating belt is in an electrified heating state, inquiring whether the heating time of the pipeline electric heating belt meets the set heating duration, if not, continuing monitoring and collecting temperature data, and if so, closing heating and continuing collecting; when the electric heating belt of the pipeline is in a power-off unheated state, comparing the obtained current temperature of the pipeline with a set temperature threshold value, and if the obtained current temperature of the pipeline is higher than the set temperature threshold value, continuing to collect the current temperature; if the heating time is less than the preset heating time, inquiring the corresponding heating time and starting the pipeline electric heating belt to start heating, and closing and continuing to collect the heating time meeting the set heating time. The invention can control the temperature of the water delivery pipeline of the power station in real time and realize the intelligent heat preservation function of the water delivery pipeline.
Description
Technical Field
The invention relates to a temperature control method for a water delivery pipeline of a power station, and belongs to the technical field of automatic monitoring of power stations.
Background
In the rapid development process of urban science and technology, various pipeline facilities (infrastructures including oil and gas pipelines, water pipes, power grids and the like) are distributed everywhere in a city and are continuously concentrated and expanded, but due to the fact that detection cost is high, maintenance cost is limited, detection means is lack, detection difficulty is high, detection personnel are in shortage, monitoring of pipelines is mostly lack, or detection surfaces are insufficient, accidents are frequent, and great loss is caused to urban economy, social stability and public safety.
At present, the main method adopted by domestic power station water pipelines in the aspect of temperature control is to lay a self-temperature-limiting electric heating belt along the power station water pipelines, simultaneously lay a single-point temperature measuring device on each water pipeline, and adopt heat-insulating cotton as a peripheral cold-proof material at the periphery of each water pipeline. And after the water pipe enters a cold season, the self-temperature-limiting electric heating band switches of all the pipelines are turned on to electrify the electric heating bands, so that the electric heating bands are always kept in an electrified heating state, and the function of heat preservation of the water pipe of the power station is achieved. This approach suffers mainly from several disadvantages:
1. the actual temperature condition of the water delivery pipeline cannot be comprehensively reflected by single-point temperature measurement, because the water delivery pipeline of the power station has a certain length, the average length is more than 10 meters, the single-point temperature measurement can only reflect the temperature condition of a temperature measurement point of the pipeline, the temperature condition outside the temperature measurement point of the pipeline cannot be reflected, and the temperature measurement data of the pipeline is dispersed, so that an accurate judgment basis cannot be provided for power plant maintenance personnel;
2. the temperature management and control mode is automatic, intelligent and weak, and because the power station water pipeline distributes comparatively dispersedly and adopts the single-point temperature measurement mode, need adopt the manual work to patrol and examine the mode and carry out the heat preservation investigation to water pipeline, the operational aspect of the electric heat tape of all pipelines of inspection of frequent inspection, whether normal work is gone up to the heating tape through modes such as touch.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a temperature control method for a water pipeline of a power station, which can realize all-weather real-time distributed temperature monitoring for the water pipeline of the power station for 24 hours and can automatically power on/off a pipeline electric heating belt according to monitored temperature data so as to realize the heat preservation function of the water pipeline of the power station.
The invention specifically adopts the following technical scheme to solve the technical problems:
a temperature control method for a water conveying pipeline of a power station comprises the following steps:
carrying out temperature data monitoring and acquisition on the water pipeline periodically by using a distributed temperature monitoring mode, and counting the acquired temperature data to obtain the current temperature of the pipeline;
inquiring the electric heating band-pass and power-off state of the pipeline:
when the pipeline electric heating belt is in an electrified heating state, inquiring whether the heating time of the pipeline electric heating belt meets the set heating time, if not, continuing to perform distributed temperature data monitoring and acquisition on the water pipeline according to the period, and if so, turning off the pipeline electric heating belt to heat and continuing to perform distributed temperature data monitoring and acquisition on the water pipeline according to the period;
when the pipeline electric heating belt is in a power-off unheated state, comparing the obtained current pipeline temperature with a set temperature threshold value, and if the current pipeline temperature is higher than the set temperature threshold value, continuously carrying out distributed temperature data monitoring and acquisition on the water pipeline periodically; if the current temperature of the pipeline is lower than a set temperature threshold value, inquiring corresponding heating time length and starting a pipeline electric heating belt to start heating, judging the heating time length after the pipeline electric heating belt is heated, and when the heating time length meets the set heating time length, closing the pipeline electric heating belt to heat and continuously carrying out distributed temperature data monitoring and acquisition on the water pipeline according to a period; otherwise, when the heating time of the pipeline electric heating belt does not meet the set heating time, the distributed temperature data monitoring and acquisition of the water pipeline is continuously carried out according to the period.
Further, as a preferred technical solution of the present invention: the method for monitoring the distributed temperature comprises the steps of adopting a temperature monitoring optical fiber and a temperature monitoring instrument, wherein the temperature monitoring optical fiber is arranged on the water pipeline and is connected with the temperature monitoring instrument.
Further, as a preferred technical solution of the present invention: in the method, the period is timed according to hours or minutes.
By adopting the technical scheme, the invention can produce the following technical effects:
the temperature control method for the water conveying pipeline of the power station is based on a distributed temperature monitoring technology and an electric heating band-pass/power-off technology, real-time control on the temperature of the water conveying pipeline of the power station is completed, all-weather real-time distributed temperature monitoring for 24 hours can be realized by combining the processes of threshold setting, electric heating band heating control and the like, meanwhile, automatic power-on/power-off can be carried out on the electric heating band according to the monitored temperature data, the intelligent heat preservation function of the water conveying pipeline of the power station is realized, and therefore the manual efficiency, automation and intelligent level of the power station are improved. The invention has strong practicability and can be applied to various fields of petroleum, natural gas, water transmission, power grids and the like.
Drawings
Fig. 1 is a schematic flow chart of a temperature control method for a water pipeline of a power station.
FIG. 2 is a schematic diagram of the arrangement of the electric heating belt of the pipeline in the invention.
Wherein the reference numerals explain: 1-water pipeline, 2-pipeline electric heating band and 3-temperature monitoring optical fiber.
Detailed Description
The following describes embodiments of the present invention with reference to the drawings.
As shown in fig. 1, the invention relates to a temperature control method for a water pipeline of a power station, which specifically comprises the following steps:
firstly, starting temperature control, utilizing a distributed temperature monitoring mode to periodically monitor and collect temperature data of a water pipeline, and counting the collected temperature data after the temperature data of the pipeline is collected every time to obtain the current temperature of the pipeline;
then, inquiring the electric heating band-pass and power-off state of the pipeline:
1. when the pipeline electric heating belt is in an electrified heating state, inquiring whether the heating time of the pipeline electric heating belt meets the set heating time T, if the heating time of the pipeline electric heating belt does not meet the set heating time T, continuing to perform distributed temperature data monitoring and acquisition on the water pipeline according to the period, and if so, turning off the pipeline electric heating belt to complete heating and continuing to perform distributed temperature data monitoring and acquisition on the water pipeline according to the period;
2. when the pipeline electric heating belt is in a power-off unheated state, comparing the obtained current pipeline temperature with a set temperature threshold value D, and if the current pipeline temperature is higher than the set temperature threshold value D, continuously carrying out distributed temperature data monitoring and acquisition on the water pipeline according to a period; if the current temperature of the pipeline is lower than a set temperature threshold value D, inquiring corresponding heating time length and starting a pipeline electric heating belt to start heating, judging the heating time length after the pipeline electric heating belt is heated, and when the heating time length meets a set heating time length T, closing the pipeline electric heating belt to heat to finish heating and continuously carrying out distributed temperature data monitoring and acquisition on the water pipeline according to a period; otherwise, when the heating time of the pipeline electric heating belt does not meet the set heating time, the distributed temperature data monitoring and acquisition of the water pipeline is continuously carried out according to the period.
As shown in fig. 2, in the method, preferably, a temperature monitoring optical fiber 3 and a temperature monitoring instrument are adopted in a distributed temperature monitoring manner, the temperature monitoring optical fiber is arranged on the water pipeline and connected with the temperature monitoring instrument, and a pipeline electric heating belt 2 is arranged in the water pipeline 1, so as to perform distributed temperature collection. And, in the method, the period is timed in hours or minutes.
Specifically, the distributed temperature acquisition of the temperature monitoring optical fiber 3 is performed by adopting a distributed optical fiber temperature monitoring instrument based on raman scattering or brillouin scattering technology, the temperature monitoring instrument is generally additionally arranged in a machine room on-duty cabinet, the temperature monitoring optical fiber 3 laid in the water pipeline is connected to the instrument, the temperature monitoring instrument can perform distributed acquisition on the temperature data of the water pipeline through the temperature monitoring optical fiber 3, and the acquired distributed temperature data is stored and reported to be used as a judgment basis for controlling the electric heating band switch of the pipeline.
The process according to the invention will now be illustrated by way of a specific example. The specific embodiment is as follows:
step 1: as shown in fig. 2, the pipeline heating zone and the temperature monitoring optical fiber are arranged, the temperature monitoring optical fiber is connected with the temperature monitoring instrument, after the temperature control is started, the measurement period of the distributed temperature monitoring is set to 5min, the temperature data of the water pipeline is monitored and collected every 5min, the collected temperature data is stored and analyzed, and the monitored temperature of the current pipeline of the water pipeline is 3 ℃.
Step 2: and (3) judging that the current pipeline electric heating belt is in a non-energized heating state, setting a temperature threshold value D to be 10 ℃, comparing the current pipeline temperature of 3 ℃ with the set temperature threshold value of 10 ℃, and entering the step 3 if the comparison result shows that the current pipeline temperature of 3 ℃ is lower than the threshold value of 10 ℃.
And step 3: setting the heating time T to be 2 h; meanwhile, inquiring corresponding heating duration through a temperature threshold D and starting a pipeline electric heating belt for heating, and entering step 4.
And 4, step 4: recording the heating time length of the current pipeline electric heating belt as T1, comparing the heating time length with 2h of the set heating time length T, if the heating time length T1 is lower than 2h of the set heating time length T, returning to the step 1 for execution, if the heating time length T1 is not less than T, closing the pipeline electric heating belt for heating, continuing returning to the step 1, monitoring and collecting temperature data of the water pipeline according to periods, and finishing real-time control of the temperature of the water pipeline of the power station.
In conclusion, the method of the invention is based on the distributed temperature monitoring technology and the electric heating band-pass/power-off technology, completes the real-time control of the temperature of the water conveying pipeline of the power station, and can realize the intelligent heat preservation function of the water conveying pipeline, thereby improving the manual efficiency and the automation and intelligence level of the power station.
The embodiments of the present invention have been described in detail with reference to the drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.
Claims (3)
1. A temperature control method for a water conveying pipeline of a power station is characterized by comprising the following steps:
carrying out temperature data monitoring and acquisition on the water pipeline periodically by using a distributed temperature monitoring mode, and counting the acquired temperature data to obtain the current temperature of the pipeline;
inquiring the electric heating band-pass and power-off state of the pipeline:
when the pipeline electric heating belt is in an electrified heating state, inquiring whether the heating time of the pipeline electric heating belt meets the set heating time, if not, continuing to perform distributed temperature data monitoring and acquisition on the water pipeline according to the period, and if so, turning off the pipeline electric heating belt to heat and continuing to perform distributed temperature data monitoring and acquisition on the water pipeline according to the period;
when the pipeline electric heating belt is in a power-off unheated state, comparing the obtained current pipeline temperature with a set temperature threshold value, and if the current pipeline temperature is higher than the set temperature threshold value, continuously carrying out distributed temperature data monitoring and acquisition on the water pipeline periodically; if the current temperature of the pipeline is lower than a set temperature threshold value, inquiring corresponding heating time length and starting a pipeline electric heating belt to start heating, judging the heating time length after the pipeline electric heating belt is heated, and when the heating time length meets the set heating time length, closing the pipeline electric heating belt to heat and continuously carrying out distributed temperature data monitoring and acquisition on the water pipeline according to a period; otherwise, when the heating time of the pipeline electric heating belt does not meet the set heating time, the distributed temperature data monitoring and acquisition of the water pipeline is continuously carried out according to the period.
2. The power station water pipe temperature control method according to claim 1, characterized in that: the method for monitoring the distributed temperature comprises the steps of adopting a temperature monitoring optical fiber and a temperature monitoring instrument, wherein the temperature monitoring optical fiber is arranged on the water pipeline and is connected with the temperature monitoring instrument.
3. The power station water pipe temperature control method according to claim 1, characterized in that: in the method, the period is timed according to hours or minutes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011478265.4A CN112731991A (en) | 2020-12-15 | 2020-12-15 | Power station water pipeline temperature control method |
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| CN202011478265.4A CN112731991A (en) | 2020-12-15 | 2020-12-15 | Power station water pipeline temperature control method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114857501A (en) * | 2022-04-26 | 2022-08-05 | 上海应用技术大学 | Water pipeline heat tracing band temperature control and monitoring system and method thereof |
| CN114870316A (en) * | 2022-06-08 | 2022-08-09 | 山东高速建设管理集团有限公司 | Intelligent monitoring device and method for fire fighting pipeline in tunnel based on distributed optical fiber |
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| JP2001201406A (en) * | 2000-01-19 | 2001-07-27 | Mitsubishi Heavy Ind Ltd | Measurement method for refracory furnace temperature and device thereof using optical fiber |
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2020
- 2020-12-15 CN CN202011478265.4A patent/CN112731991A/en active Pending
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| JP2001201406A (en) * | 2000-01-19 | 2001-07-27 | Mitsubishi Heavy Ind Ltd | Measurement method for refracory furnace temperature and device thereof using optical fiber |
| KR101579440B1 (en) * | 2014-06-27 | 2015-12-23 | 린나이코리아 주식회사 | Correction method of gas boiler hot water temperature |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114857501A (en) * | 2022-04-26 | 2022-08-05 | 上海应用技术大学 | Water pipeline heat tracing band temperature control and monitoring system and method thereof |
| CN114870316A (en) * | 2022-06-08 | 2022-08-09 | 山东高速建设管理集团有限公司 | Intelligent monitoring device and method for fire fighting pipeline in tunnel based on distributed optical fiber |
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Application publication date: 20210430 |