CN106247311A - Leak out monitoring device, leak out automatic blowing-out device and economizer - Google Patents
Leak out monitoring device, leak out automatic blowing-out device and economizer Download PDFInfo
- Publication number
- CN106247311A CN106247311A CN201610876813.6A CN201610876813A CN106247311A CN 106247311 A CN106247311 A CN 106247311A CN 201610876813 A CN201610876813 A CN 201610876813A CN 106247311 A CN106247311 A CN 106247311A
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- China
- Prior art keywords
- sensor
- economizer
- shoot door
- blower fan
- alarm
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
- F22D1/00—Feed-water heaters, i.e. economisers or like preheaters
- F22D1/02—Feed-water heaters, i.e. economisers or like preheaters with water tubes arranged in the boiler furnace, fire tubes, or flue ways
- F22D1/12—Control devices, e.g. for regulating steam temperature
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Examining Or Testing Airtightness (AREA)
- Alarm Systems (AREA)
Abstract
The present invention relates to field of boilers, especially relate to one leak out monitoring device, leak out automatic blowing-out device and economizer.Monitoring device of leaking out includes sensor and alarm；Sensor and alarm signal connect.The automatic blowing-out device that leaks out includes blower fan, controller and sensor；Controller connects respectively at blower fan and sensor signal.Economizer includes economizer body, sensor, controller and blower fan；Sensor is fixedly installed at the shoot door of economizer body, for monitoring the sealing state of shoot door；Blower fan is arranged on one end of the breather line of economizer body, for providing ventilation drive to breather line；Controller is connected with sensor and blower fan signal respectively.Monitoring device that what the present invention passed through leak out, leak out automatic blowing-out device and economizer, simple in construction, easy to use and flexible, low cost, and effect is obvious, it is possible to eliminate hidden danger of leaking out in time, stops security incident and occurs, it is ensured that safe operation of the boiler.
Description
Technical field
The present invention relates to field of boilers, especially relate to one leak out monitoring device, leak out automatic blowing-out device and save coal
Device.
Background technology
Economizer is mounted to the boiler back end ductwork bottom a kind of device for recovery waste heat, it is possible to boiler feedwater added
Heat becomes the heating surface of the saturation water under drum pressure.Owing to it absorbs the heat of low-temperature flue gas, reduce the exhaust gas temperature of flue gas,
Save the energy, improve efficiency, so referred to as economizer.
Primarily serving the purpose of of economizer:
1, absorb the heat of low-temperature flue gas, reduce exhaust gas temperature, reduce flue gas loss, save fuel.
2, first heat at economizer before entering drum due to feedwater, therefore decrease the heat absorption fed water at heating surface, can
To replace, with economizer, the evaporating heating surface that part cost is higher.
3, feed temperature improves, and enters drum and will reduce wall temperature difference, and thermal stress reduces accordingly, extends drum and uses the longevity
Life.
Economizer is to absorb the waste heat in boiler, and therefore, boiler smoke, during temperature reduces, has flue dust and is detained
In economizer.
In the middle of boiler operatiopn, deashing personnel are when clearing up economizer dust stratification, and occasional forgets to close shoot door or clearly
Ash door such as is not closed completely at the situation, and so may result in economizer seriously leaks out, and boiler draft ability declines, and now aerator is still
At normal air feed, will result in the distinguished and admirable serious diseases of boiler internal, form potential safety hazard.
Summary of the invention
It is an object of the invention to provide monitoring device of leaking out, leak out automatic blowing-out device and economizer, existing to solve
Technical problem present in technology.
The monitoring device of leaking out that the present invention provides, it includes sensor and alarm；
Described sensor and described alarm signal connect.
Further, described sensor is displacement transducer, range sensor or pressure transducer.
Present invention also offers one to leak out automatic blowing-out device, it includes blower fan, controller and sensor；
Described controller connects respectively at described blower fan and described sensor signal.
Further described sensor is displacement transducer, range sensor or pressure transducer.
Further, described controller is also associated with alarm.
Further, described alarm is audible-visual annunciator.
Present invention also offers a kind of economizer, it includes economizer body, sensor, alarm and blower fan；
Described sensor is fixedly installed at the shoot door of described economizer body, for monitoring the sealing of described shoot door
State；
Described alarm is connected with described sensor signal；
Described blower fan is arranged on one end of the breather line of described economizer body, for providing logical to described breather line
Aerodynamic force.
Present invention also offers a kind of economizer, it includes economizer body, sensor, controller and blower fan；
Described sensor is fixedly installed at the shoot door of described economizer body, for monitoring the sealing of described shoot door
State；
Described blower fan is arranged on one end of the breather line of described economizer body, for providing logical to described breather line
Aerodynamic force；
Described controller is connected with described sensor and described blower fan signal respectively.
Further, described sensor is pressure transducer；
Described pressure transducer is arranged between described shoot door and described economizer body.
Further, described sensor is displacement transducer or range sensor；
Described sensor is fixedly installed on described economizer, and is arranged on described shoot door turning away from described shoot door
One end of moving axis.
Monitoring device of leaking out that the present invention provides, leak out automatic blowing-out device and economizer, by setting fixing for sensor
Putting at shoot door, by the sensor monitoring to the sealing of shoot door, when shoot door does not seal, alarm is reported
Alert or controller controls blower fan and quits work, so that staff can find the situation of shoot door in time, and then by deashing
Door reseals, and has reached the final purpose sealing shoot door.Monitoring device of leaking out that the present invention provides, leak out automatically
Blowing-out device and economizer, simple in construction, easy to use and flexible, low cost, effect is obvious, it is possible to eliminate hidden danger of leaking out in time,
Stop security incident to occur, it is ensured that safe operation of the boiler.
Accompanying drawing explanation
In order to be illustrated more clearly that the specific embodiment of the invention or technical scheme of the prior art, below will be to specifically
In embodiment or description of the prior art, the required accompanying drawing used is briefly described, it should be apparent that, in describing below
Accompanying drawing is some embodiments of the present invention, for those of ordinary skill in the art, before not paying creative work
Put, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
The schematic diagram of the monitoring device of leaking out that Fig. 1 provides for the embodiment of the present invention；
The schematic diagram of the automatic blowing-out device that leaks out that Fig. 2 provides for the embodiment of the present invention；
The structural representation of the economizer that Fig. 3 provides for the embodiment of the present invention；
The structural representation of the another kind of economizer that Fig. 4 provides for the embodiment of the present invention.
Structure schematic diagram；
Reference:
1: economizer body 2: pressure transducer 3: shoot door
4: displacement transducer
Detailed description of the invention
Below in conjunction with accompanying drawing, technical scheme is clearly and completely described, it is clear that described enforcement
Example is a part of embodiment of the present invention rather than whole embodiments.Based on the embodiment in the present invention, ordinary skill
The every other embodiment that personnel are obtained under not making creative work premise, broadly falls into the scope of protection of the invention.
In describing the invention, it should be noted that term " " center ", " on ", D score, "left", "right", " vertically ",
Orientation or the position relationship of the instruction such as " level ", " interior ", " outward " they are based on orientation shown in the drawings or position relationship, merely to
Be easy to describe the present invention and simplifying describe rather than instruction or the hint device of indication or element must have specific orientation,
With specific azimuth configuration and operation, therefore it is not considered as limiting the invention.
Additionally, term " first ", " second ", " the 3rd " are only used for describing purpose, and it is not intended that instruction or hint phase
To importance.
In describing the invention, it should be noted that unless otherwise clearly defined and limited, term " is installed ", " phase
Even ", " connection " should be interpreted broadly, for example, it may be fixing connection, it is also possible to be to removably connect, or be integrally connected；Can
To be mechanical connection, it is also possible to be electrical connection；Can be to be joined directly together, it is also possible to be indirectly connected to by intermediary, Ke Yishi
The connection of two element internals.For the ordinary skill in the art, can understand that above-mentioned term is at this with concrete condition
Concrete meaning in invention.
As shown in Figure 1, the invention provides one and leak out monitoring device, it includes sensor and alarm；
Described sensor and described alarm signal connect.
The monitoring device of leaking out of the present invention, in use, is arranged on sensor near shoot door 3, utilizes sensor
Being monitored the sealing of shoot door 3, after deashing end-of-job, if shoot door 3 does not seal, Sensor monitoring is to sealing
Time not, by signal transmission to alarm, reported to the police by alarm, and then remind staff that shoot door 3 carries out weight
New closedown, until the effect sealed can be reached.
It is preferred embodiment that described sensor is displacement transducer 4, range sensor or pressure transducer 2.
The kind of sensor has a variety of, and in the present embodiment, sensor is displacement transducer 4, range sensor or pressure
Force transducer 2.
When sensor is displacement transducer 4 or range sensor, sensor is arranged on economizer, and is arranged on deashing
Door 3 is away from one end of its rotary shaft, and when shoot door 3 is closed, when it is not reaching to set sealing station, Sensor monitoring is not
To shoot door 3, and then carry out alert process.
It is to say, when opening shoot door 3 and carrying out deashing process, alarm begins to carry out alert operation, works as deashing
After completing, and shoot door 3 is carried out seal close after, alarm just can be sounded all clear, with prompting seal shoot door 3 worked
Become.
When sensor is pressure transducer 2, pressure transducer 2 is arranged between economizer and shoot door 3, and it can be
It is fixed on economizer, it is also possible to be integrally fixed on shoot door 3, as long as it can sense between economizer and shoot door 3
Pressure.
When shoot door 3 is opened, when pressure that pressure transducer 2 monitors is inadequate, by pressure signal transmission to alarm,
Reported to the police by alarm；After ashman completes, when shoot door 3 is closed, if sealing effectiveness is preferable, it is possible to both reach
During fixed seal pressure, the pressure signal transmission that pressure transducer 2 monitors is to alarm, and then makes alarm stop alarm；
After ashman completes, when shoot door 3 is closed, sealing effectiveness is inadequate, the pressure signal that now pressure transducer 2 will monitor
Passing to alarm, alarm equipment alarm, to point out staff to be re-closing off shoot door 3 so that it is reach set sealing property.
It is to say, use pressure transducer 2 identical with displacement transducer 4 and range sensor, it is all to open
During shoot door 3, alarm is persistently reported to the police, till shoot door 3 seals and closes.
It is pointed out that in the present embodiment, sensor is range sensor, displacement transducer 4 or pressure transducer
2, but it is not limited solely to above-mentioned several sensor, and it can also is that other kinds of sensor, as long as it can be by passing
The sealing of shoot door 3 newly can be monitored by sensor.
Present invention also offers one to leak out automatic blowing-out device, as in figure 2 it is shown, it includes blower fan, controller and sensing
Device；
Described controller connects respectively at described blower fan and described sensor signal.
In the present embodiment, it is provided that the principle of the automatic blowing-out device that leaks out identical, all with above-mentioned air leak test device
Being to be monitored the sealing of shoot door 3 by sensor, except for the difference that, in the present embodiment, monitoring shoot door 3 does not has
During sealing, sensor, by signal propagation controller, controls blower fan blowing-out by controller, and then whole economizer can not be entered
Row work, till shoot door 3 is sealed by staff again, and then reaches to point out shoot door 3 not have Packed work
With.
Preferred embodiment for described sensor be displacement transducer 4, range sensor or pressure transducer 2.
Sensor in the present embodiment is identical with the sensor set-up mode leaked out in monitoring device, and it all can be arranged
For displacement transducer 4, range sensor or pressure transducer 2, and position is set and duty is the most identical.
In like manner, the sensor in the present embodiment can also be other kinds of sensor, as long as it can monitor shoot door 3
Sealing state, and the sealing state of shoot door 3 can be passed to controller, make controller that blower fan to be controlled.
It is preferred embodiment to be also associated with alarm on described controller.
In the present embodiment, alarm is set on the controller, by the setting of alarm, when the sealing of shoot door 3
Can not, when blower fan quits work, the warning utilizing alarm is shoot door 3 to point out the out-of-work reason of blower fan, and then
Avoid owing to blower fan quits work its duty checking other parts, and then decrease the repair time.
It is preferred embodiment that described alarm is audible-visual annunciator.
In the present embodiment, alarm is set to audible-visual annunciator, uses sound and light to report to the police the most simultaneously.
In the present embodiment, the state of the shoot door 3 by monitoring, alarm can be made under the effect of controller
Send the suggestion voice such as " Men Wei fastens ", " door is not turned off ", meanwhile, utilize lighting effects, form corresponding text prompt, in order to
In to shoot door 3 maintenance of machine.
Present invention also offers a kind of economizer, as shown in Figure 3 and Figure 4, it includes economizer body 1, sensor, warning
Device and blower fan；
Described sensor is fixedly installed at the shoot door 3 of described economizer body 1, for monitoring described shoot door 3
Sealing state；
Described alarm is connected with described sensor signal；
Described blower fan is arranged on one end of the breather line of described economizer body 1, for providing to described breather line
Ventilation drive.
After economizer in the present embodiment is by reporting to the police, manual blowing-out, detects shoot door 3, really afterwards
When not sealing, carry out resealing process.
In use, sensor is arranged near shoot door 3, utilizes sensor that the sealing of shoot door 3 is carried out
Monitoring, after deashing end-of-job, if shoot door 3 does not seal, when Sensor monitoring to sealing is inadequate, gives report by signal transmission
Alert device, is reported to the police by alarm, and then reminds staff to be re-closing off shoot door 3, until can reach
To the effect sealed.
Meanwhile, the setting of sensor, can be displacement transducer 4, range sensor or pressure transducer 2, and it is specifically pacified
Holding position, can be adjusted according to concrete type, has reached optimal monitoring effect.
Present invention also offers a kind of economizer, as shown in Figure 3 and Figure 4, it includes economizer body 1, sensor, control
Device and blower fan；
Described sensor is fixedly installed at the shoot door 3 of described economizer body 1, for monitoring described shoot door 3
Sealing state；
Described blower fan is arranged on one end of the breather line of described economizer body 1, for providing to described breather line
Ventilation drive；
Described controller is connected with described sensor and described blower fan signal respectively.
The principle of economizer in the present embodiment is identical with above-mentioned economizer, is all to shoot door 3 by sensor
Sealing be monitored, except for the difference that, in the present embodiment, monitor shoot door 3 when not sealing, signal is passed by sensor
Pass controller, control blower fan blowing-out by controller, and then whole economizer can not be operated, until staff's weight
Till newly being sealed by shoot door 3, and then reach to point out shoot door 3 not have Packed effect.
It is preferred embodiment that described sensor is pressure transducer 2；
Described pressure transducer 2 is arranged between described shoot door 3 and described economizer body 1.
In the present embodiment, sensor is pressure transducer 2, and pressure transducer 2 is fixedly installed on economizer, and one
End is arranged between shoot door 3 and economizer body 1, and the other end stretches out outside shoot door 3, is connected with controller, it is possible to effectively
By the pressure transmission between shoot door 3 and economizer body 1 to controller, and then the seal pressure set by controller is come
The sealing of shoot door 3 is monitored.
It is preferred embodiment that described sensor is displacement transducer 4 or range sensor；
Described sensor is fixedly installed on described economizer, and is arranged on described shoot door 3 away from described shoot door 3
One end of rotary shaft.
In the present embodiment, sensor is displacement transducer 4 or range sensor, displacement transducer 4 or range sensor
It is fixedly installed on economizer body 1, and is arranged on shoot door 3 one end away from its rotary shaft, it is possible to shoot door 3 and province's coal
Distance between device body 1 is monitored, and when its distance is not zero, sealing property is inadequate, and controller controls blower fan blowing-out, report
Alert device is reported to the police simultaneously.
Monitoring device of leaking out that the present invention provides, leak out automatic blowing-out device and economizer, by setting fixing for sensor
Putting at shoot door 3, by the sensor monitoring to the sealing of shoot door 3, when shoot door 3 does not seal, alarm enters
Row is reported to the police or controller controls blower fan and quits work, so that staff can find the situation of shoot door 3 in time, and then will
Shoot door 3 reseals, and has reached the final purpose sealing shoot door 3.The monitoring device of leaking out of present invention offer, leakage
Wind automatic blowing-out device and economizer, simple in construction, easy to use and flexible, low cost, effect is obvious, it is possible to eliminates in time and leaks out
Hidden danger, stops security incident and occurs, it is ensured that safe operation of the boiler.
Last it is noted that various embodiments above is only in order to illustrate technical scheme, it is not intended to limit；To the greatest extent
The present invention has been described in detail by pipe with reference to foregoing embodiments, it will be understood by those within the art that: it depends on
So the technical scheme described in foregoing embodiments can be modified, or the most some or all of technical characteristic is entered
Row equivalent；And these amendments or replacement, do not make the essence of appropriate technical solution depart from various embodiments of the present invention technology
The scope of scheme.
Claims (10)
1. a monitoring device of leaking out, it is characterised in that include sensor and alarm；
Described sensor and described alarm signal connect.
Detection device the most according to claim 1, it is characterised in that described sensor is displacement transducer, Distance-sensing
Device or pressure transducer.
3. the automatic blowing-out device that leaks out, it is characterised in that include blower fan, controller and sensor；
Described controller connects respectively at described blower fan and described sensor signal.
The automatic blowing-out device that leaks out the most according to claim 3, it is characterised in that described sensor be displacement transducer,
Range sensor or pressure transducer.
The automatic blowing-out device that leaks out the most according to claim 3, it is characterised in that be also associated with on described controller reporting to the police
Device.
The automatic blowing-out device that leaks out the most according to claim 5, it is characterised in that described alarm is audible-visual annunciator.
7. an economizer, it is characterised in that include economizer body, sensor, alarm and blower fan；
Described sensor is fixedly installed at the shoot door of described economizer body, for monitoring the sealing shape of described shoot door
State；
Described alarm is connected with described sensor signal；
Described blower fan is arranged on one end of the breather line of described economizer body, for providing ventilation dynamic to described breather line
Power.
8. an economizer, it is characterised in that include economizer body, sensor, controller and blower fan；
Described sensor is fixedly installed at the shoot door of described economizer body, for monitoring the sealing shape of described shoot door
State；
Described blower fan is arranged on one end of the breather line of described economizer body, for providing ventilation dynamic to described breather line
Power；
Described controller is connected with described sensor and described blower fan signal respectively.
Economizer the most according to claim 8, it is characterised in that described sensor is pressure transducer；
Described pressure transducer is arranged between described shoot door and described economizer body.
Economizer the most according to claim 8, it is characterised in that described sensor is displacement transducer or Distance-sensing
Device；
Described sensor is fixedly installed on described economizer, and is arranged on the described shoot door rotary shaft away from described shoot door
One end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610876813.6A CN106247311B (en) | 2016-10-08 | 2016-10-08 | The automatic blowing-out device that leaks out for economizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610876813.6A CN106247311B (en) | 2016-10-08 | 2016-10-08 | The automatic blowing-out device that leaks out for economizer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106247311A true CN106247311A (en) | 2016-12-21 |
| CN106247311B CN106247311B (en) | 2019-11-15 |
Family
ID=57612380
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610876813.6A Expired - Fee Related CN106247311B (en) | 2016-10-08 | 2016-10-08 | The automatic blowing-out device that leaks out for economizer |
Country Status (1)
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|---|---|
| CN (1) | CN106247311B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103670515A (en) * | 2013-12-26 | 2014-03-26 | 中国矿业大学 | Underground coal mine air-door fault early warning system |
| CN104132437A (en) * | 2014-08-14 | 2014-11-05 | 上海嘉成轨道交通安全保障系统股份公司 | Air inlet mechanism of air purification system and control method |
| CN204479245U (en) * | 2015-03-11 | 2015-07-15 | 北京哈宜节能环保科技开发有限公司 | A kind of H type low-level (stack-gas) economizer leak detecting device |
| CN204591750U (en) * | 2015-05-04 | 2015-08-26 | 亿昇(天津)科技有限公司 | The real-time measuring and adjustation device of a kind of blower wheel air gap |
| CN205117781U (en) * | 2015-11-06 | 2016-03-30 | 江西尚朋电子科技有限公司 | Kiln fan trouble autoalarm |
| CN105987789A (en) * | 2015-02-03 | 2016-10-05 | 林海鸥 | Leak detection device for waste heat recovery heat exchanger |
| CN206322701U (en) * | 2016-10-12 | 2017-07-11 | 重庆中科渝芯电子有限公司 | A kind of semiconductor device with extension modulator zone |
-
2016
- 2016-10-08 CN CN201610876813.6A patent/CN106247311B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103670515A (en) * | 2013-12-26 | 2014-03-26 | 中国矿业大学 | Underground coal mine air-door fault early warning system |
| CN104132437A (en) * | 2014-08-14 | 2014-11-05 | 上海嘉成轨道交通安全保障系统股份公司 | Air inlet mechanism of air purification system and control method |
| CN105987789A (en) * | 2015-02-03 | 2016-10-05 | 林海鸥 | Leak detection device for waste heat recovery heat exchanger |
| CN204479245U (en) * | 2015-03-11 | 2015-07-15 | 北京哈宜节能环保科技开发有限公司 | A kind of H type low-level (stack-gas) economizer leak detecting device |
| CN204591750U (en) * | 2015-05-04 | 2015-08-26 | 亿昇(天津)科技有限公司 | The real-time measuring and adjustation device of a kind of blower wheel air gap |
| CN205117781U (en) * | 2015-11-06 | 2016-03-30 | 江西尚朋电子科技有限公司 | Kiln fan trouble autoalarm |
| CN206322701U (en) * | 2016-10-12 | 2017-07-11 | 重庆中科渝芯电子有限公司 | A kind of semiconductor device with extension modulator zone |
Non-Patent Citations (1)
| Title |
|---|
| 董泳，张辉等: "回转式空气预热器非接触式漏风控制系统", 《热能动力工程》 * |
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| CN106247311B (en) | 2019-11-15 |
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