CN106338365A - Coal dust conveying device leakage monitoring and early warning device and method - Google Patents
Coal dust conveying device leakage monitoring and early warning device and method Download PDFInfo
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- CN106338365A CN106338365A CN201610683080.4A CN201610683080A CN106338365A CN 106338365 A CN106338365 A CN 106338365A CN 201610683080 A CN201610683080 A CN 201610683080A CN 106338365 A CN106338365 A CN 106338365A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/002—Investigating fluid-tightness of structures by using thermal means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
- G01M3/28—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds
- G01M3/2807—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds for pipes
- G01M3/2815—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds for pipes using pressure measurements
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/38—Investigating fluid-tightness of structures by using light
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Abstract
The invention discloses a coal dust conveying device leakage monitoring and early warning device and method. The leakage monitoring and early warning device comprises distributed temperature sensitive optical fibers which are wound and adhered on the external wall of a conveying steel pipe. The conveying steel pipe is externally wrapped by a heat insulation layer and a protective sleeve. The conveying steel pipe is divided into multiple continuous monitoring areas along the axis. The protective sleeve in each monitoring area is externally provided with a jacket. The two ends of the jacket stretch into the protective sleeve and the heat insulation layer and then are connected with the conveying steel pipe in an adhesive way. The jacket and the external wall of the conveying steel pipe form an enclosed pressure detection cavity. In the pressure detection cavity, an optical fiber grating vibration sensor is arranged on the external wall of the conveying steel pipe, and an optical pressure sensor is installed in the heat insulation layer. Leakage of the coal dust conveying device caused by holes or cracks at the early stage of leakage can be accurately judged and early warning can be performed, leakage of the coal dust conveying device caused by friction of the coal dust in conveying can also be accurately judged and the leakage points can be accurately captured and located and early warning can be performed so that safe production of enterprises can be ensured.
Description
Technical field
The present invention relates to a kind of leakage monitoring prior-warning device of pulverized coal conveying device and method, espespecially a kind of monitoring and early warning
The equipment whether leaking for the pulverized coal conveying device in coal liquifaction/gas technique and method.
Background technology
For coal liquifaction/gas industry, safety in production is the cardinal task of enterprise.During execution coal liquifaction/gas technique, raw coal will
First pass through belt conveyor and deliver to run coal bin, make, after grinding, be dried, sorting, the coal that particle diameter is at 63 microns to 500 microns
Coal dust is delivered to pulverized coal warehouse using low-pressure nitrogen by powder, then is delivered to reaction unit by high pressure nitrogen.Current is air conveying
The maximum transmission capacity of circuit pulverized coal conveying device may be up to 160 tons/bar/hour.In actual enforcement, a large amount of pulverized coal particles
Ceaselessly can be rubbed in high speed conveying way the inwall of pulverized coal conveying device, accumulation over time, particularly coal dust conveying dress
Put the lower wall surface of inwall, the curved wall of bending part is easily worn through, thus causing leakage of pulverized coal, with air be mixed to form flammable
Naked light easily initiation fire is run into after thing, or even blast, lead to pernicious safety responsibility accident to occur.
In the industry coal dust is conveyed all using high temperature inert hot gas as delivery vehicles at present, and the coal dust along heat tracing property
Conveyer device is equipped with supporting heat-insulation layer.From practical operation it is found that due to the presence of heat-insulation layer, pulverized coal conveying device is because of mill
When damaging early period of origination leakage, the safety inspection personnel of line walking are difficult to find with perusal, in addition this manual inspection side
Not only safety cannot be guaranteed formula, also drastically influence the production efficiency of enterprise, and for ensureing production safety, factory generally adopts
The method of stop production to overhaul, carries out ultrasonic inspection with ultrasonic reflectoscope along pipeline, but this mode efficiency is low, workload is big, real
When property is poor.
Some enterprises to monitor leakage of pulverized coal situation using traditional point type pressure transducer at present, but from actual enforcement
Can see, because pulverized coal conveying device is longer, occur the position of leakage to have very big randomness, therefore this technology cannot
Leakage is monitored, and can only detect after leakage occurs, lack pre-alerting ability.
Content of the invention
It is an object of the invention to provide a kind of leakage monitoring prior-warning device of pulverized coal conveying device and method, this device and
On the one hand method not only accurately can be sentenced to whether pulverized coal conveying device occurs leakage to make because of hole or crack at the leakage initial stage
Disconnected, also whether leakage can be occurred to make accurate judgement because of coal dust friction in transit pulverized coal conveying device, and to leakage
Point is made accurate seizure and is positioned, and can guarantee the safety in production of enterprise well, on the other hand, also can be to pulverized coal conveying device
Weak part is realized prediction and is positioned, and formulating stopping production maintenance project for enterprise provides foundation.
To achieve these goals, present invention employs technical scheme below:
A kind of leakage monitoring prior-warning device of pulverized coal conveying device it is characterised in that: it includes being spaced coiling and being pasted onto
Distributed temperature sensing optical fiber on the whole outer wall of conveying steel pipe, is coated with outside the conveying steel pipe being provided with distributed temperature sensing optical fiber successively
Heat-insulation layer, protective case, conveying steel pipe marks off continuously some monitored areas along axis, wherein: the guarantor in each monitored area
It is provided with one layer of jacket, the two ends of jacket are closely bonded with conveying steel pipe after stretching into protective case and heat-insulation layer outside sheath, so that folder
Form airtight pressure detecting cavity between gram corresponding conveying steel pipe outer wall, be in the conveying steel in pressure detecting cavity
Pipe outer wall is provided with least one optical fiber raster vibration sensor, and is in installation inside the heat-insulation layer in pressure detecting cavity
There are at least one optical pressure sensor, distributed temperature sensing optical fiber, optical fiber raster vibration sensor, optical pressure sensor and letter
Number processing meanss are connected.
Described jacket is made up of the high intensity macromolecule resin material of instantaneous photocuring.
When arranging multiple described optical fiber raster vibration sensor in a described monitored area, all described fiber gratings
Vibrating sensor is uniform on described conveying steel pipe outer wall.
Described distributed temperature sensing optical fiber is equally spaced wound on described conveying steel pipe outer wall, to convey steel described in real-time monitoring
Along the temperature field on conveying steel pipe length direction outside pipe.
The leakage monitoring method for early warning that a kind of leakage monitoring prior-warning device based on described pulverized coal conveying device is realized, its
It is characterised by, it includes step:
Described optical fiber raster vibration sensor in described distributed temperature sensing optical fiber and each described monitored area and institute
State optical pressure sensor and feed back detection signal to described signal processing apparatus in real time, by described signal processing apparatus to detection letter
Number carry out Treatment Analysis and judge, wherein:
When the pressure signal that the described optical pressure sensor of a certain monitored area feeds back to changes, show this prison
The described conveying steel pipe surveyed in region occurs in that hole or crack, or will have occurred and that leakage, then described signal processing device
Put and send early warning signal；
When the vibration signal characteristics that the described optical fiber raster vibration sensor of a certain monitored area feeds back to change,
Show that the described conveying steel pipe in this monitored area or will have occurred and that leakage, then described signal processing apparatus send early warning
Signal, and described signal processing apparatus are sentenced further according to the temperature signal that described distributed temperature sensing optical fiber feeds back to
Disconnected: when the temperature field of position a certain in this monitored area also changes, then the position that temperature field changes is judged as letting out
Leak source, described signal processing apparatus send alarm signal.
Further, set when the pressure signal that the described optical pressure sensor of a certain monitored area feeds back to exceedes
During the large change of constant-pressure difference, show that this monitored area leaks, then described signal processing apparatus send warning
Signal.
Further, when the vibration signal characteristics that the described optical fiber raster vibration sensor of a certain monitored area feeds back to are sent out
Life exceedes the large change setting vibration difference, or the temperature field of a certain position in a certain monitored area exceedes setting
During the large change of temperature gap, show that this monitored area leaks, described signal processing apparatus send alarm signal.
The invention has the advantage that
Leakage monitoring prior-warning device of the present invention and method are safe and reliable to operation, sensitivity of detection and accuracy high it can be ensured that
Enterprise safety operation.One aspect of the present invention can pass through optical pressure sensor at the leakage initial stage, in the very first time, coal dust is conveyed
Whether device occurs leakage to make accurate judgement early warning because of hole or crack, and the accumulation with data, can pass through
Fusion to distributed temperature sensing data and pipe vibration data, to judge the weak part of conveying steel pipe, so that user
Enough time is had to carry out reasonable parking maintenance, it is to avoid to take hastily to stop in emergency during a large amount of leakage and cause unnecessary loss, separately
On the one hand, whether the present invention can occur leakage to make accurate judgement because of coal dust friction in transit pulverized coal conveying device,
And leakage point is made with accurate seizure and positions, send early warning, warning, so that user can be targetedly to pulverized coal conveying device
Carry out on-call maintenance, maintenance used time is greatly reduced, effectively increases work efficiency.
Being mainly characterized by of the present invention deploys a number of high intensity, resistant to elevated temperatures in pulverized coal conveying device outermost
Resin jacket, to monitor that coal dust leaks in time, and the protection due to jacket, coal dust will not leak in air, from
And make factory have time enough to be stopped in an orderly manner, it is to avoid the loss causing because stopping in emergency.
Brief description
Fig. 1 is the composition schematic diagram of leakage monitoring prior-warning device of the present invention.
Specific embodiment
As shown in figure 1, leakage monitoring prior-warning device of the present invention is for defeated in pulverized coal conveying device by nitrogen to coal dust
During sending, whether a part or will have occurred and that leakage is monitored and early warning, warning.Traditional pulverized coal conveying device
Including conveying steel pipe 60, conveying steel pipe 60 is coated with heat-insulation layer 70, and heat-insulation layer 70 is coated with protective case 80, and coal dust is in conveying
Transmission is realized by nitrogen in steel pipe 60.
As schemed, leakage monitoring prior-warning device of the present invention includes compartment of terrain at a certain distance and is wound around coiling and is pasted onto conveying steel
Distributed temperature sensing optical fiber 20 on the whole outer wall of pipe 60, is provided with and coats successively outside the conveying steel pipe 60 of distributed temperature sensing optical fiber 20
There are heat-insulation layer 70, protective case 80 (heat-insulation layer 70 and protective case 80 belongs to it is well known that technology), conveying steel pipe 60 is along its axis
(i.e. along conveying steel pipe length direction) marks off continuously some monitored areas (sectional region), wherein: each monitoring
Be provided with one layer of jacket 50 outside protective case 80 in region, the two ends of jacket 50 stretch into after protective case 80 and heat-insulation layer 70 with conveying
Steel pipe 60 outer wall closely bonds, so that forming airtight pressure detecting chamber between the corresponding conveying steel pipe of jacket 50 60 outer wall
Body, such as Fig. 1, pressure detecting cavity assumes the bag-shaped of two edge sealings, will be coated with the conveying steel pipe of heat-insulation layer 70 and protective case 80
60 wrap up, and conveying steel pipe 60 outer wall being in pressure detecting cavity tightens to be sticked has at least one optical fiber raster vibration to pass
Be provided with inside sensor 30, and the heat-insulation layer 70 being in pressure detecting cavity at least one optical pressure sensor 40 (
Here, optical pressure sensor 40 does not reside on conveying steel pipe 60 outer wall), distributed temperature sensing optical fiber 20, optical fiber raster vibration
Sensor 30, optical pressure sensor 40 signal port respectively be used for determining whether leakage, leakage point and send early warning, report
The corresponding signal port of alert signal processing apparatus 10 is connected.
In actual design, jacket 50 is made up of the high intensity macromolecule resin material (existing material) of instantaneous photocuring,
Generally by photocuring, high intensity, high adhesion macromolecular patch field fabrication, this resin material and steel tubing have very
Strong degree of adhesion, pressure up to 6mpa.Jacket 50 can bear the pressure producing during conveying steel pipe 60 leakage and not let out coal dust
Drain in air.
In the present invention, between each monitored area it is in continuous state, to realize whole pulverized coal conveying device is carried out comprehensively
Monitoring, and in actual enforcement, the bending part of conveying steel pipe 60 should correspond to one monitored area of design, is that emphasis monitoring is right
As.
In actual design, when arranging multiple optical fiber raster vibration sensor 30 in a monitored area, all optical fiber
Grating vibration sensor 30 is uniform on conveying steel pipe 60 outer wall.For a monitored area, in it, multiple optics pressures can be installed
Force transducer 40, but there is cost raising, function waste.
In the present invention, optical pressure sensor 40 itself is not charged, and using safety, it can be in real-time perception jacket 50
Pressure.Distributed temperature sensing optical fiber 20 is distributed temperature measuring device, and it is equally spaced wound on conveying steel pipe 60 outer wall, with real-time
Along the temperature field on conveying steel pipe length direction outside monitoring conveying steel pipe 60, can be to each portion of whole conveying steel pipe 60 outer wall
The temperature of position is detected.Optical fiber raster vibration sensor 30 can real-time detection conveying steel pipe 60 Vibration Condition.
In the present invention, distributed temperature sensing optical fiber 20, optical fiber raster vibration sensor 30, optical pressure sensor 40 are this
The well-known devices in field and device, signal processing apparatus 10 are technology known in the art, therefore their concrete structure is not at this
In describe in detail.
Based on the invention described above leakage monitoring prior-warning device, the invention allows for a kind of leakage prison of pulverized coal conveying device
Survey method for early warning, it comprises the steps:
Optical fiber raster vibration sensor 30 in distributed temperature sensing optical fiber 20 and each monitored area and optical pressure pass
Sensor 40 feeds back, to signal processing apparatus 10, the detection signal that each measurement obtains, in real time by signal processing apparatus 10 to each detection
Signal carries out Treatment Analysis and judges, wherein:
When the pressure signal that the optical pressure sensor 40 of a certain monitored area feeds back to changes, show this monitoring
Conveying steel pipe 60 in region occurs in that hole or crack, or will have occurred and that leakage, and then signal processing apparatus 10 send
Early warning signal.
And further, when the pressure signal that the optical pressure sensor 40 of a certain monitored area feeds back to occurs suddenly to surpass
Cross the large change (i.e. compared with normal pressure value, exceeding suddenly the change of set pressure differential value) of set pressure differential value
When, show that this monitored area leaks, then signal processing apparatus 10 send alarm signal.
Vibration signal (frequency of vibration or the vibration wave feeding back to when the optical fiber raster vibration sensor 30 of a certain monitored area
Shape etc.) feature when changing, shows that the conveying steel pipe 60 in this monitored area or will have occurred and that leakage, then at signal
Reason device 10 sends early warning signal, and signal processing apparatus 10 are in this monitored area according to distributed temperature sensing optical fiber 20
The temperature signal that partial feedback returns is determined whether: when the temperature field of position a certain in this monitored area also changes,
The position that then temperature field changes is judged as leakage point, that is, catch and oriented leakage point, thus signal processing apparatus
10 send alarm signal.
And further, when the vibration signal characteristics that the optical fiber raster vibration sensor 30 of a certain monitored area feeds back to are dashed forward
The large change so exceeding setting vibration difference (i.e. compared with normal vibration value, exceedes suddenly setting vibration difference
Change), or the temperature field of a certain position in a certain monitored area exceedes suddenly the larger change of design temperature difference
When changing (change i.e. compared with normal temperature value, exceeding suddenly design temperature difference), show that this monitored area occurs
Leakage, signal processing apparatus 10 send alarm signal.
The implementation principle of the present invention is described below.
Put into effect the lengthening of time with pulverized coal conveying device, and the tube wall of conveying steel pipe 60 is because of coal dust during transport
Constantly friction can be gradually thinning, leads to the heat conductivity at thinning position to increase, more heat transfer is transmitted to outside.When conveying steel pipe 60
When there is leakage, the coal dust leaking out and nitrogen can occur heat exchange with heat-insulation layer 70, break leakage point heat-insulation layer nearby
Uniformity of Temperature Field within 70, leads to local temperature change substantially, is now therefore permissible using distributed temperature sensing optical fiber 20
Accurately catch and position leakage point, but, conveying steel pipe 60 thinning but although thinning position when not yet there is leakage
Heat conductivity change, the temperature field within the corresponding heat-insulation layer 70 in thinning position changes, but the change in this temperature field
Change is fainter, and the noise of temperature signal is poor, is therefore used alone distributed temperature sensing optical fiber 20 to catch and to position
There is very big erroneous judgement in leakage point, and when causing tube wall thinning because of friction, the vibration performance of conveying steel pipe 60 can change,
So in the present invention, distributed temperature sensing optical fiber 20 is combined with optical fiber raster vibration sensor 30, come to conveying steel pipe 60
Whether generation leakage is judged.Specifically, when the tube wall of conveying steel pipe 60 is thinning, when leakage will occur, when optical fiber light
When grid vibrating sensor 30 detects the vibration performance of conveying steel pipe 60 with not thinning (vibration performance during normal pulverized coal conveying)
Difference, that is, when changing, in conjunction with the temperature signal (now temperature signal is obvious) of distributed temperature sensing optical fiber 20 detection, come
Judge the thinning position position of conveying steel pipe 60, catch and orient leakage point, then send warning.
Further, since the pressure within conveying steel pipe 60 is higher than outside, when conveying steel pipe 60 goes out because use time is long
When existing hole or crack, heat-insulation layer 70 pressure rise can be led to, the therefore present invention passes through to detect the pressure in heat-insulation layer 70, to reach
To the testing goal whether hole or crack to conveying steel pipe 60, and then prevent leakage occurs.Then, the present invention passes through light
Learn the Sensitive Detection means to pressure for the pressure transducer 40, at the leakage initial stage, just can be to conveying steel pipe 60 whether because of hole or split
Stitch and occur leakage to judge.When leakage or will be had begun to, send early warning, so that user has time enough to carry out
Rationally parking maintenance, it is to avoid stop in emergency and cause damage.
In the present invention, even if leaking, the design structure of the present invention also can ensure that coal dust and nitrogen will not be straight simultaneously
Connect and leak in air, but leak in the pressure detecting cavity that jacket 50 is formed, jacket 50 is high intensity macromolecular material,
There is higher compressive resistance, thus certain protection can be formed, to make user have the orderly parking maintenance of time enough, reducing
Unnecessary waste.
The invention has the advantage that
Leakage monitoring prior-warning device of the present invention and method are safe and reliable to operation, sensitivity of detection and accuracy high it can be ensured that
Enterprise safety operation.One aspect of the present invention can pass through optical pressure sensor at the leakage initial stage, in the very first time, coal dust is conveyed
Whether device occurs leakage to make accurate judgement early warning because of hole or crack, and the accumulation with data, can pass through
Fusion to distributed temperature sensing data and pipe vibration data, to judge the weak part of conveying steel pipe, so that user
Enough time is had to carry out reasonable parking maintenance, it is to avoid to take hastily to stop in emergency during a large amount of leakage and cause unnecessary loss, separately
On the one hand, whether the present invention can occur leakage to make accurate judgement because of coal dust friction in transit pulverized coal conveying device,
And leakage point is made with accurate seizure and positions, send early warning, warning, so that user can be targetedly to pulverized coal conveying device
Carry out on-call maintenance, maintenance used time is greatly reduced, effectively increases work efficiency.
The above is present pre-ferred embodiments and its know-why used, and comes for those skilled in the art
Say, without departing from the spirit and scope of the present invention, any based on the equivalent transformation on the basis of technical solution of the present invention,
Simple replacement etc. is obvious to be changed, and belongs within the scope of the present invention.
Claims (7)
1. a kind of pulverized coal conveying device leakage monitoring prior-warning device it is characterised in that: it includes being spaced coiling be pasted onto defeated
Send the distributed temperature sensing optical fiber on the whole outer wall of steel pipe, be provided with outside the conveying steel pipe of distributed temperature sensing optical fiber and be coated with guarantor successively
Warm layer, protective case, conveying steel pipe marks off continuously some monitored areas along axis, wherein: the protection in each monitored area
Set is outside to be provided with one layer of jacket, and the two ends of jacket are closely bonded with conveying steel pipe after stretching into protective case and heat-insulation layer, so that jacket
Form airtight pressure detecting cavity between corresponding conveying steel pipe outer wall, be in the conveying steel pipe in pressure detecting cavity
Outer wall is provided with least one optical fiber raster vibration sensor, and is in and is provided with inside the heat-insulation layer in pressure detecting cavity
At least one optical pressure sensor, distributed temperature sensing optical fiber, optical fiber raster vibration sensor, optical pressure sensor and signal
Processing meanss are connected.
2. pulverized coal conveying device as claimed in claim 1 leakage monitoring prior-warning device it is characterised in that:
Described jacket is made up of the high intensity macromolecule resin material of instantaneous photocuring.
3. pulverized coal conveying device as claimed in claim 1 leakage monitoring prior-warning device it is characterised in that:
When arranging multiple described optical fiber raster vibration sensor in a described monitored area, all described optical fiber raster vibrations
Sensor is uniform on described conveying steel pipe outer wall.
4. pulverized coal conveying device as claimed in claim 1 leakage monitoring prior-warning device it is characterised in that:
Described distributed temperature sensing optical fiber is equally spaced wound on described conveying steel pipe outer wall, with conveying steel pipe described in real-time monitoring outside
Portion is along the temperature field on conveying steel pipe length direction.
5. a kind of leakage monitoring prior-warning device based on the pulverized coal conveying device any one of Claims 1-4 is realized
Leakage monitoring method for early warning is it is characterised in that it includes step:
Described optical fiber raster vibration sensor in described distributed temperature sensing optical fiber and each described monitored area and described light
Learn pressure transducer and feed back detection signal to described signal processing apparatus in real time, by described signal processing apparatus, detection signal is entered
Row Treatment Analysis and judge, wherein:
When the pressure signal that the described optical pressure sensor of a certain monitored area feeds back to changes, show this monitoring section
Described conveying steel pipe in domain occurs in that hole or crack, or will have occurred and that leakage, and then described signal processing apparatus are sent out
Go out early warning signal；
When the vibration signal characteristics that the described optical fiber raster vibration sensor of a certain monitored area feeds back to change, show
Described conveying steel pipe in this monitored area or will have occurred and that leakage, and then described signal processing apparatus send early warning letter
Number, and described signal processing apparatus are determined whether according to the temperature signal that described distributed temperature sensing optical fiber feeds back to:
When the temperature field of position a certain in this monitored area also changes, then the position that temperature field changes is judged as leaking
Point, described signal processing apparatus send alarm signal.
6. leakage monitoring method for early warning as claimed in claim 5 it is characterised in that:
When the pressure signal that the described optical pressure sensor of a certain monitored area feeds back to exceedes set pressure differential value
During large change, show that this monitored area leaks, then described signal processing apparatus send alarm signal.
7. leakage monitoring method for early warning as claimed in claim 5 it is characterised in that:
Shake when the vibration signal characteristics that the described optical fiber raster vibration sensor of a certain monitored area feeds back to exceed setting
The temperature field of a certain position in the large change of moment value, or a certain monitored area exceedes design temperature difference relatively
During big change, show that this monitored area leaks, described signal processing apparatus send alarm signal.
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| CN201610683080.4A CN106338365B (en) | 2016-08-18 | 2016-08-18 | A kind of the leakage monitoring prior-warning device and method of pulverized coal conveying device |
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| CN108721805A (en) * | 2018-05-22 | 2018-11-02 | 威特龙消防安全集团股份公司 | A kind of pulverized coal bin carbon dioxide inerting method and inerting system |
| CN108765891A (en) * | 2018-05-22 | 2018-11-06 | 威特龙消防安全集团股份公司 | A kind of fire-fighting method and system for pulverized coal preparation technique |
| CN108804739A (en) * | 2018-03-29 | 2018-11-13 | 大唐环境产业集团股份有限公司 | A kind of coal store inside coal temperature field computation method |
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| CN113295345A (en) * | 2021-05-08 | 2021-08-24 | 广西防城港核电有限公司 | Method for detecting leakage point of inner pipe of double-wall pipe |
| CN114704780A (en) * | 2022-03-31 | 2022-07-05 | 中海石油气电集团有限责任公司 | LNG long-distance conveying cold leakage online monitoring system and method |
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