CN201707752U - Fire alarm device of air preheater - Google Patents
Fire alarm device of air preheater Download PDFInfo
- Publication number
- CN201707752U CN201707752U CN2010202032358U CN201020203235U CN201707752U CN 201707752 U CN201707752 U CN 201707752U CN 2010202032358 U CN2010202032358 U CN 2010202032358U CN 201020203235 U CN201020203235 U CN 201020203235U CN 201707752 U CN201707752 U CN 201707752U
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- Prior art keywords
- temperature
- infrared temperature
- programmable logic
- logic controller
- thermopair
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
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- Fire-Detection Mechanisms (AREA)
Abstract
The utility model relates to the field of fire alarm devices for boilers, in particular to a fire alarm device of an air preheater, and comprises a temperature detector, an alarm device (2), a programmable controller (3), a touch screen (4), an intermediate relay (5), a motor (6), a gear actuator (7), a rotary arm (8) and a pneumatic dedusting device (9) and is characterized in that an infrared temperature probe (11), a thermocouple (12), the touch screen (4) and the intermediate relay (5) are all connected with the programmable controller (3); the intermediate relay (5) is respectively connected with the alarm device (2), the motor (6) and the pneumatic dedusting device (9); the motor (6) is connected with the rotary arm (8) through the gear actuator (7); and the infrared temperature probe (11) is fixed onto the rotary arm (8). The fire alarm device of an air preheater has the advantages of simple structure, high sensitivity and accurate alarm.
Description
Technical field
The utility model relates to the fire alarm equipment field that is used for boiler, is specially a kind of air preheater fire alarm installation.
Background technology
Air preheater is to utilize fume afterheat to improve to enter the equipment of boiler furnace air themperature, and present modal type is a swinging, and it is to utilize flue gas and air alternately to add hot-air by heating surface, makes air obtain heating to improve temperature on the one hand; The flue gas exhaust gas temperature is descended to improve the utilization factor of fume afterheat.During use, air preheater slowly rotates, smoke inlet and air intake are constant, flue gas and air enter the fume side and the air side of air preheater respectively by smoke inlet and air intake, flue gas is discharged the heat transferred heating surface after entering fume side again from exhanst gas outlet, heating surface is metal heat radiator, absorbed the be rotated down to air side of the heat radiator of flue gas heat at air preheater, with the heat transferred air, the air of process preheating enters boiler furnace from air out.Air preheater rotates a circle and promptly finishes heat interchange between flue gas and the air.The air preheater of Generator Set boiler, experience shows at the scene, most of air preheaters on fire, at first be to take place at regional area, cause that by imperfect combustion fuel fire on the heated element that is deposited on air preheater inside this is confirmed that by experiment laboratory examination also proves, if when the focus that is burning made the heated element temperature rise to more than 700 ℃, these focuses can cause components made of steel on fire.In operational process,, need install alarm additional in order to prevent fire burns.But present boiler fire alarm installation mostly is the temperature alarming that adopts infrared sensor to survey simply, lacks the measuring and calculating to the variation of ambient temperature situation, exists the problem that susceptibility is poor, rate of false alarm is high.
The utility model content
In order to overcome the defective of prior art, a kind of fire alarm equipment of simple in structure, highly sensitive, the boiler accurately and timely of reporting to the police is provided, the utility model discloses a kind of air preheater fire alarm installation.
The utility model reaches goal of the invention by following technical solution:
A kind of air preheater fire alarm installation, comprise hygrosensor, warning device, Programmable Logic Controller, touch-screen, auxiliary reclay, motor, gear driver, spiral arm and wind-force dust arrester, its structure is: hygrosensor adopts infrared temperature-test sensor and thermopair, warning device comprises employing pilot lamp and hummer, the signal output part of infrared temperature-test sensor and thermopair all is connected with Programmable Logic Controller by order wire, touch-screen all is connected with Programmable Logic Controller by order wire with auxiliary reclay, auxiliary reclay also connects warning device respectively by order wire, motor and wind-force dust arrester, motor connects spiral arm by gear driver, and drive spiral arm by gear driver and make shuttle-scanning, spiral arm is finished used time of shuttle-scanning and is sampling period of infrared temperature-test sensor, air preheater used time that rotates a circle is sampling period of thermopair, infrared temperature-test sensor is fixed on the spiral arm, and the wind-force dust arrester is located at the probe lens top of infrared temperature-test sensor.
Described air preheater fire alarm installation, its structure is: its amplitude range of shuttle-scanning that motor is done by gear driver drive spiral arm is 180 °, the infrared temperature-test sensor that is fixed on the spiral arm has 4, be arranged to a row of horizontal direction, thermopair has 3, is located at air out place, air in place and the gas approach place of air preheater respectively.
Described air preheater fire alarm installation, its structure is: when the temperature that records when the probe of infrared temperature probe surpasses 50 ℃～55 ℃, by the enforcement water cooling of Controlled by Programmable Controller to infrared temperature-test sensor, when the temperature that records when infrared temperature probe surpasses 150 ℃～200 ℃, pilot lamp flicker and buzzer call by the Controlled by Programmable Controller warning device, when the temperature that records when thermopair surpasses 400 ℃, by the pilot lamp flicker and the buzzer call of Controlled by Programmable Controller warning device.
Described air preheater fire alarm installation, its structure is:
Thermopair adopts " thermal efficiency " algorithm to predict the generation of fire, and concrete grammar is: the temperature that thermopair records is done following calculating through Programmable Logic Controller, establish thermopair at the air out place, the temperature that records of air in place and gas approach place is respectively T
1, T
2And T
3, the medial temperature at the air out place that thermopair recorded in a sampling period is
Order:
Wherein C is [0.5,1.5] interval interior constant, gets 1.2 usually, and as if the θ ' that all has any θ greater than the last cycle in continuous two sampling periods, then the pilot lamp of Controlled by Programmable Controller indicating alarm device glimmers and buzzer call.
Infrared temperature-test sensor adopts " focus " algorithm to carry out fire prediction, concrete grammar is: when the difference that detects the same point temperature when infrared temperature probe in two sampling periods surpasses 50 ℃, by the pilot lamp flicker and the buzzer call of Controlled by Programmable Controller warning device.
When the utility model uses, the utility model is installed in the air preheater of boiler, comprehensive utilization infrared temperature-test sensor and thermopair detect near the temperature the heated element, and the signal that records is sent to Programmable Logic Controller handles, just often show near the temperature value that each measuring point of air preheater is.When high temperature or temperature jump situation occurring, carry out sound, light warning on the spot, Programmable Logic Controller also can be charged to it automatically internal memory and can show, and has power-down protection.When temperature occurring and surpass the temperature extremes value of setting in the air preheater and be the superhigh temperature situation, to carry out sound, light warning again, the utility model can be reserved the remote alarms interface simultaneously, by this interface alerting signal is delivered to power plant's automatic fire alarm system and reports to the police.In order to guarantee reliability service of the present utility model, the utility model also has self-diagnostic function.When Programmable Logic Controller did not receive any input signal, meeting was sound, light is reported to the police indication, and this signal will be delivered to central station of floating dock so that in time handle simultaneously.
The utlity model has simple in structure, highly sensitive, the advantage accurately of reporting to the police, thereby the abnormal condition that can in time find air preheater is got rid of disaster hidden-trouble.
Description of drawings
Fig. 1 is a connection diagram of the present utility model, and among the figure, arrow is represented to connect with order wire, and solid line is represented mechanical connection;
Fig. 2 is that motor is looked synoptic diagram by the master that gear driver drive spiral arm makes infrared temperature-test sensor carry out the structure of scanning motion in the utility model;
Fig. 3 is that motor drives the schematic top plan view that spiral arm makes the structure of infrared temperature-test sensor execution scanning motion by gear driver in the utility model;
Fig. 4 is the synoptic diagram of the structure of the utility model middle gear driver, spiral arm, wind-force dust arrester and infrared temperature-test sensor.
Embodiment
Below further specify the utility model by specific embodiment.
Embodiment 1
A kind of air preheater fire alarm installation comprises hygrosensor, warning device 2, Programmable Logic Controller 3, touch-screen 4, auxiliary reclay 5, motor 6, gear driver 7, spiral arm 8 and wind-force dust arrester 9, and as shown in Figure 1, concrete structure is:
Hygrosensor adopts 4 infrared temperature- test sensors 11 and 3 thermopairs 12, and warning device 2 comprises pilot lamp and hummer,
The signal output part of infrared temperature-test sensor 11 and thermopair 12 all is connected with Programmable Logic Controller 3 by order wire, touch-screen 4 all is connected with Programmable Logic Controller 3 by order wire with auxiliary reclay 5, auxiliary reclay 5 also connects warning device 2 respectively by order wire, motor 6 and wind-force dust arrester 9, as Fig. 2～shown in Figure 4, motor 6 connects spiral arm 8 by gear driver 7, and drive spiral arms 8 by gear driver 7 and make shuttle-scanning, its amplitude range is 180 °, infrared temperature-test sensor 11 is fixed on the spiral arm 8, be arranged to a row of horizontal direction, wind-force dust arrester 9 is located at the probe lens top of infrared temperature- test sensor 11, and 3 thermopairs 12 are located at the air out place of air preheater respectively, air in place and gas approach place.Spiral arm 8 is finished used time of shuttle-scanning and is sampling period of infrared temperature-test sensor 11, and air preheater used time that rotates a circle is sampling period of thermopair 12.Among Fig. 1, arrow is represented to connect with order wire, and solid line is represented mechanical connection.
When the temperature that records when the probe of infrared temperature probe 11 surpasses 50 ℃～55 ℃, by the enforcement water cooling of Programmable Logic Controller 3 controls to infrared temperature-test sensor 11, when the temperature that records when infrared temperature probe 11 surpasses 150 ℃～200 ℃, pilot lamp flicker and buzzer call by Programmable Logic Controller 3 control warning devices 2, when the temperature that records when thermopair 12 surpasses 400 ℃, by the pilot lamp flicker and the buzzer call of Programmable Logic Controller 3 control warning devices 2.
Thermopair adopts " thermal efficiency " algorithm to predict the generation of fire, concrete grammar is: the temperature that thermopair 12 records is done following calculating through Programmable Logic Controller 3, establish thermopair 12 at the air out place, the temperature that records of air in place and gas approach place is respectively T
1, T
2And T
3, the medial temperature at the air out place that thermopair 12 recorded in a sampling period is
Order:
Wherein C is [0.5,1.5] interval interior constant, gets 1.2 usually, and as if the θ ' that all has any θ greater than the last cycle in continuous two sampling periods, then the pilot lamp of Programmable Logic Controller 3 control indicating alarm devices 2 glimmers and buzzer call,
Infrared temperature-test sensor adopts " focus " algorithm to carry out fire prediction, concrete grammar is: when the difference that detects the same point temperature when infrared temperature probe 11 in two sampling periods surpasses 50 ℃, by the pilot lamp flicker and the buzzer call of Programmable Logic Controller 3 control warning devices 2.
Claims (4)
1. air preheater fire alarm installation, comprise hygrosensor, warning device (2), Programmable Logic Controller (3), touch-screen (4), auxiliary reclay (5), motor (6), gear driver (7), spiral arm (8) and wind-force dust arrester (9), it is characterized in that:
Hygrosensor adopts infrared temperature-test sensor (11) and thermopair (12), and warning device (2) comprises employing pilot lamp and hummer,
The signal output part of infrared temperature-test sensor (11) and thermopair (12) all is connected with Programmable Logic Controller (3) by order wire, touch-screen (4) all is connected with Programmable Logic Controller (3) by order wire with auxiliary reclay (5), auxiliary reclay (5) also connects warning device (2), motor (6) and wind-force dust arrester (9) respectively by order wire
Motor (6) connects spiral arm (8) by gear driver (7), and drive spiral arm (8) by gear driver (7) and make shuttle-scanning, spiral arm (8) is finished used time of shuttle-scanning and is sampling period of infrared temperature-test sensor (11), air preheater used time that rotates a circle is sampling period of thermopair (12), infrared temperature-test sensor (11) is fixed on the spiral arm (8), and wind-force dust arrester (9) is located at the probe lens top of infrared temperature-test sensor (11).
2. air preheater fire alarm installation as claimed in claim 1 is characterized in that:
Its amplitude range of shuttle-scanning that motor (6) is done by gear driver (7) drive spiral arm (8) is 180 °,
The infrared temperature-test sensor (11) that is fixed on the spiral arm (6) has 4, is arranged to a row of horizontal direction,
Thermopair (12) has 3, is located at air out place, air in place and the gas approach place of air preheater respectively.
3. air preheater fire alarm installation as claimed in claim 1 or 2 is characterized in that:
When the temperature that records when the probe of infrared temperature probe (11) surpasses 50 ℃～55 ℃, by the enforcement water cooling of Programmable Logic Controller (3) control to infrared temperature-test sensor (11), when the temperature that records when infrared temperature probe (11) surpasses 150 ℃～200 ℃, pilot lamp flicker and buzzer call by Programmable Logic Controller (3) control warning device (2), when the temperature that records when thermopair (12) surpasses 400 ℃, by the pilot lamp flicker and the buzzer call of Programmable Logic Controller (3) control warning device (2).
4. air preheater fire alarm installation as claimed in claim 1 or 2 is characterized in that:
The temperature that thermopair (12) records is done following calculating through Programmable Logic Controller (3), establish thermopair (12) at the air out place, the temperature that records of air in place and gas approach place is respectively T
1, T
2And T
3, the medial temperature at the air out place that thermopair (12) recorded in a sampling period is
Order:
Wherein C is [0.5,1.5] interval interior constant, and as if the θ ' that all has any θ greater than the last cycle in continuous two sampling periods, then the pilot lamp of Programmable Logic Controller (3) control indicating alarm device (2) glimmers and buzzer call,
When the difference that detects the same point temperature when infrared temperature probe (11) in two sampling periods surpasses 50 ℃, by the pilot lamp flicker and the buzzer call of Programmable Logic Controller (3) control warning device (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202032358U CN201707752U (en) | 2010-05-24 | 2010-05-24 | Fire alarm device of air preheater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202032358U CN201707752U (en) | 2010-05-24 | 2010-05-24 | Fire alarm device of air preheater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201707752U true CN201707752U (en) | 2011-01-12 |
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ID=43444907
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202032358U Expired - Lifetime CN201707752U (en) | 2010-05-24 | 2010-05-24 | Fire alarm device of air preheater |
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| Country | Link |
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| CN (1) | CN201707752U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102243109A (en) * | 2011-06-28 | 2011-11-16 | 高明逊 | Metal wall temperature measurement system for rotary air preheater |
| CN102393262A (en) * | 2011-09-22 | 2012-03-28 | 上海市东方海事工程技术有限公司 | Air preheater optical fiber temperature on-line monitoring system and method |
| CN102784747A (en) * | 2012-07-16 | 2012-11-21 | 京东方科技集团股份有限公司 | High-temperature solidifying furnace |
| CN107590942A (en) * | 2017-09-22 | 2018-01-16 | 成都市精鹰科技有限公司 | One kind is based on array temperature test type fire alarm and detection method |
| US10753893B2 (en) * | 2018-01-26 | 2020-08-25 | Hamilton Sunstrand Corporation | Gear set health monitoring system |
-
2010
- 2010-05-24 CN CN2010202032358U patent/CN201707752U/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102243109A (en) * | 2011-06-28 | 2011-11-16 | 高明逊 | Metal wall temperature measurement system for rotary air preheater |
| CN102243109B (en) * | 2011-06-28 | 2013-03-13 | 高明逊 | Metal wall temperature measurement system for rotary air preheater |
| CN102393262A (en) * | 2011-09-22 | 2012-03-28 | 上海市东方海事工程技术有限公司 | Air preheater optical fiber temperature on-line monitoring system and method |
| CN102784747A (en) * | 2012-07-16 | 2012-11-21 | 京东方科技集团股份有限公司 | High-temperature solidifying furnace |
| CN102784747B (en) * | 2012-07-16 | 2014-12-10 | 京东方科技集团股份有限公司 | High-temperature solidifying furnace |
| CN107590942A (en) * | 2017-09-22 | 2018-01-16 | 成都市精鹰科技有限公司 | One kind is based on array temperature test type fire alarm and detection method |
| CN107590942B (en) * | 2017-09-22 | 2019-10-18 | 成都市精鹰科技有限公司 | One kind being based on array temperature test type fire alarm and detection method |
| US10753893B2 (en) * | 2018-01-26 | 2020-08-25 | Hamilton Sunstrand Corporation | Gear set health monitoring system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110112 |
|
| CX01 | Expiry of patent term |