CN108238383A - A kind of coal store low pressure CO2Local inerting guard method - Google Patents
A kind of coal store low pressure CO2Local inerting guard method Download PDFInfo
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- CN108238383A CN108238383A CN201810273597.5A CN201810273597A CN108238383A CN 108238383 A CN108238383 A CN 108238383A CN 201810273597 A CN201810273597 A CN 201810273597A CN 108238383 A CN108238383 A CN 108238383A
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- Prior art keywords
- inerting
- coal store
- controller
- valve
- low pressure
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D90/00—Component parts, details or accessories for large containers
- B65D90/22—Safety features
- B65D90/38—Means for reducing the vapour space or for reducing the formation of vapour within containers
- B65D90/44—Means for reducing the vapour space or for reducing the formation of vapour within containers by use of inert gas for filling space above liquid or between contents
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The invention discloses a kind of coal store low pressure CO2Local inerting guard method, including：Step 1, the hygrosensor of a certain inerting branch road or CO concentrations detectors send out alarm signal；Step 2, controller receives, and opens master control valve；Step 3, controller control opens selector valve, and start the work of air-heating type gasifier；Step 4, controller opens the corresponding subregion valve in inerting branch road, and calculating needs to spray into the CO inside coal store2Content, the pressure and flow of regulator and current-limiting apparatus are adjusted；Step 5, controller opens several nozzles of the inerting branch road injection apparatus simultaneously, to the corresponding area spray CO in coal store inside2；Step 6, after the completion of injection, controller closes injection apparatus, subregion valve, selector valve and master control valve successively.Beneficial effects of the present invention：Using low pressure CO2Localised protection is carried out to coal store inside flammable point as working media, reaches optimum efficiency, saves low pressure CO2Storage capacity and usage amount.
Description
Technical field
The present invention relates to coal store inerting protection technique field, in particular to a kind of coal store low pressure CO2Part is lazy
Change guard method.
Background technology
For the closed coal store of power plant it is commonly used be using nitrogen to coal store inside carry out inerting protection pattern,
In coal store inerting protection system front end installation nitrogen-making device, nitrogen is obtained using spatial division technology.Using making by oneself, nitrogen progress is lazy
Change the method for protection, since nitrogen gas source is wide, can prepare at any time, more economically, but it is ineffective.
Raw coal in power plant's run coal bin, pulverized coal bin can occur oxidation reaction when being contacted with air and release heat and an oxygen
Change carbon, raw coal colliding with each other for downslide process in run coal bin can cause heat that cannot distribute drawn game in time with stacking for a long time
Portion's temperature raising, while oxidation reaction can be aggravated again, dieseling will occur when local temperature is more than the burning point of coal.For
This dangerous situation, it is domestic generally to use low pressure CO2System carries out inerting protection, i.e. CO to run coal bin2Usually store up in liquid form
There are in low pressure storage tank, when there is dangerous situation in run coal bin, and inerting is needed to protect, low pressure CO2Inerting protection system starts and releases
CO2, CO2It is ejected into inside run coal bin by nozzle along pipeline under pressure, inside infiltration coal seam and above run coal bin coal seam
Space in formed one be full of CO2The inert environments of gas.The environment can effectively block contact of the raw coal with oxygen, prevent original
The generation and continuation of coal spontaneous combustion, therefore can be with the safe operation of effective protection run coal bin, low pressure CO2Inerting protecting effect is apparent.
However, it is protected for inerting of the coal storage up to 100,000 tons of big volume spherical shape coal store or silo, if with often
The nitrogen purging protecting effect of rule is bad；If using run coal bin low pressure CO2System, required low pressure CO are protected in inerting2Quantity is huge
Greatly, economy is not high, and the big scale of construction low pressure CO of stored on-site2Influence field layout and beauty.
Invention content
To solve the above problems, the purpose of the present invention is to provide a kind of coal store low pressure CO2Local inerting guard method,
Using low pressure CO2Working media as inerting protection system carries out localised protection to coal store inside flammable point, reaches best
Effect saves low pressure CO2Storage capacity and usage amount.
The present invention provides a kind of coal store low pressure CO2Local inerting guard method, this method include：
Step 1, when the temperature that the hygrosensor of a certain inerting branch road detects inside coal store is more than threshold value or CO
When the CO that concentrations detectors detect inside coal store is more than threshold value, the hygrosensor or the CO concentrations detectors are sent out
Alarm signal；
Step 2, controller receives the alarm signal of the hygrosensor or the CO concentrations detectors, the controller
Master control valve is opened in control, by CO2The liquid CO of storage device storage2It is delivered on pipeline；
Step 3, the controller control opens selector valve, and start the work of air-heating type gasifier, by CO2By liquid vapour
Turn to gaseous state；
Step 4, the controller opens the corresponding subregion valve in inerting branch road, and the controller is visited according to the temperature
The signal that device or the CO concentrations detectors detect is surveyed, calculating needs to spray into the CO inside the coal store2Content, exchange
The pressure and flow of pressure device and current-limiting apparatus are adjusted；
Step 5, the controller opens several nozzles of the inerting branch road injection apparatus simultaneously, to coal store inside
Corresponding area spray CO2, realize the local inerting protection to coal store；
Step 6, after the completion of injection, the controller closes several nozzles, the subregion on the injection apparatus successively
Valve, the selector valve and the master control valve.
As further improvement of the invention, it is assumed that need to spray into the CO inside the coal store2Content be MvKg, spray
The flow that spurts of single nozzle is L kg/s on injection device, and the inerting time of single nozzle is T hours, then needs the nozzle opened
Quantity is N=Mv/ L × T × 3600, round up number.
As further improvement of the invention, the CO2The liquid CO of storage device memory storage2Storage is M=Mv×
1.3kg。
As further improvement of the invention, further included after step 5：Between by-passing valve and the air-heating type gasifier
The pressure of pressure gauge real-time monitoring tubular road on pipeline, once pressure is more than preset threshold value, discharge of safety valve goes out in pipeline
CO2, pressure is made to be maintained in threshold range.
As further improvement of the invention, the coal store is spherical coal store or silo.
Beneficial effects of the present invention are：
Using low pressure CO2Working media as inerting protection system carries out flammable point inside spherical coal store local guarantor
Shield, the inert gas being filled with are CO2, density is heavier than air, can reach best inerting effect；
Corresponding inerting branch can be opened according to demand and carries out local inerting protection, saved low pressure CO2Storage capacity and make
Dosage, it is economical and practical.
Description of the drawings
Fig. 1 is a kind of coal store low pressure CO described in the embodiment of the present invention2The flow diagram of local inerting guard method；
Fig. 2 is low pressure CO of the present invention2The schematic diagram of local inertia protection device.
In figure,
1st, coal store；2、CO2Storage device；3rd, master control valve；4th, safety valve；5th, by-passing valve；6th, pressure gauge；7th, air temperature type gas
Change device；8th, regulator；9th, current-limiting apparatus；10th, selector valve；11st, controller；12nd, warning device；13rd, hygrosensor；14、
CO concentrations detectors；15th, injection apparatus；16th, subregion valve.
Specific embodiment
The present invention is described in further detail below by specific embodiment and with reference to attached drawing.
Embodiment 1, as shown in Figure 1, a kind of coal store low pressure CO of the embodiment of the present invention2Local inerting guard method, should
Method includes：
Step 1, when the hygrosensor 13 of a certain inerting branch road detect temperature inside coal store 1 be more than threshold value or
When the CO that CO concentrations detectors 14 detect inside coal store 1 is more than threshold value, hygrosensor 13 or CO concentrations detectors 14 are sent out
Go out alarm signal；
Step 2, controller 11 receives the alarm signal of hygrosensor 13 or CO concentrations detectors 14, and controller 11 controls
Master control valve 3 is opened, by CO2The liquid CO that storage device 2 stores2It is delivered on pipeline；
Step 3, the control of controller 11 opens selector valve 10, and start the work of air-heating type gasifier 7, by CO2By liquid
It is vaporizated into gaseous state；
Step 4, controller 11 opens the corresponding subregion valve 16 in inerting branch road, and controller 11 is according to hygrosensor 13
Or the signal that CO concentrations detectors 14 detect, calculating needs to spray into the CO inside coal store 12Content, to 8 He of regulator
The pressure and flow of current-limiting apparatus 9 are adjusted；
Step 5, controller 11 opens several nozzles of the inerting branch road injection apparatus 15 simultaneously, into coal store 1
The corresponding area spray CO in portion2, realize the local inerting protection to coal store 1；
Step 6, after the completion of injection, controller 11 closes several nozzles on injection apparatus 15, subregion valve 16, selection successively
Valve 10 and master control valve 3.
Further, when selection needs to open the quantity of nozzle, it is assumed that need to spray into the CO inside coal store 12Contain
It measures as MvKg, single nozzle spurts flow for L kg/s on injection apparatus 15, and the inerting time of single nozzle is T hours, then
It is N=M to need the nozzle quantity openedv/ L × T × 3600, round up number.
Further, in order to save low pressure CO2Storage capacity reduces CO2The floor space of storage device, can be according to need
Want the CO of inerting2Content to CO2The CO of storage device 22Storage and size are selected, CO2The liquid of 2 memory storage of storage device
State CO2Storage is M=Mv× 1.3kg, wherein, consider certain surplus, coefficient takes empirical coefficient 1.3.
Further, it is further included after step 5：Pressure gauge 6 on pipeline between by-passing valve 5 and air-heating type gasifier 7
The pressure of real-time monitoring tubular road, once pressure is more than preset threshold value, safety valve 4 is released out the CO in pipeline2, protect pressure
It holds in threshold range, avoids dangerous generation.
The local inerting method of the present invention can carry out localised protection to spherical coal store or silo.
The low pressure CO that the present invention uses2Local inertia protection device is as shown in Fig. 2, by taking spherical storehouse as an example, when being such as silo,
It only needs spherical storehouse being substituted for silo, other devices and connection remain unchanged.Low pressure CO2Local inertia protection device packet
It includes：CO2 storage devices 2, coal storage silo 1 and controller 11 are set successively on the pipeline between CO2 storage devices 2 and coal storage silo 1
It is equipped with master control valve 3, safety valve 4, by-passing valve 5, air-heating type gasifier 7, regulator 8, current-limiting apparatus 9, selector valve 10 and multiple
Inerting branch.Each inerting branch includes warning device 12, subregion valve 16 and injection apparatus 15, the input terminal of subregion valve 16 and choosing
Select valve 10 be connected, the output terminal of subregion valve 16 is connected with injection apparatus 15, warning device 12 be connected to 16 input terminal of subregion valve and
On pipeline between 16 output terminal of subregion valve, warning device 12 and subregion valve 16 are arranged in outside coal storage silo 1, injection apparatus 15
It is arranged in inside coal storage silo 1.Selector valve 10, warning device 12, subregion valve 16, injection apparatus 15 and master control valve 3 with control
Device 11 is connected.Multiple inerting branches are equidistantly arranged in juxtaposition, specifically, between multiple warning devices 12 and multiple 16 equalizations of subregion valve
Away from being arranged in parallel at outside coal storage silo 1, multiple injection apparatus 15 are equidistantly arranged in parallel at the top inside spherical coal store 1
Between bottom.This laying mode is both beautiful or save space convenient for whole layout.Warning device 12 is by temperature
Detector 13 and CO concentrations detectors 14 form, and hygrosensor 13 and CO concentrations detectors 14 are both connected to subregion valve 16 and input
On pipeline between end and 16 output terminal of subregion valve.The combined use of two kinds of detectors, avoid glowing in coal storage silo, spontaneous combustion,
Detonation occurs.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, that is made any repaiies
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (5)
1. a kind of coal store low pressure CO2Local inerting guard method, which is characterized in that this method includes：
Step 1, when the hygrosensor (13) of a certain inerting branch road detect the internal temperature of coal store (1) be more than threshold value or
When CO concentrations detectors (14) detect the internal CO of coal store (1) more than threshold value, the hygrosensor (13) or the CO
Concentrations detectors (14) send out alarm signal；
Step 2, controller (11) receives the alarm signal of the hygrosensor (13) or the CO concentrations detectors (14), institute
It states controller (11) control and opens master control valve (3), by CO2The liquid CO of storage device (2) storage2It is delivered on pipeline；
Step 3, controller (11) control opens selector valve (10), and start the work of air-heating type gasifier (7), by CO2By
Liquid is vaporizated into gaseous state；
Step 4, the controller (11) opens the corresponding subregion valve (16) in inerting branch road, and the controller (11) is according to institute
The signal that hygrosensor (13) or the CO concentrations detectors (14) detect is stated, calculating needs to spray into the coal store (1)
Internal CO2Content, the pressure and flow of regulator (8) and current-limiting apparatus (9) are adjusted；
Step 5, the controller (11) while several nozzles of the inerting branch road injection apparatus (15) are opened, to coal store
(1) internal corresponding area spray CO2, realize that the local inerting to coal store (1) is protected；
Step 6, after the completion of injection, the controller (11) closes several nozzles on the injection apparatus (15), described successively
Subregion valve (16), the selector valve (10) and the master control valve (3).
2. coal store low pressure CO according to claim 12Local inerting guard method, which is characterized in that assuming that needing to spray into
The internal CO of the coal store (1)2Content be MvKg, single nozzle spurts flow for L kg/s on injection apparatus (15), single
The inerting time of a nozzle is T hours, then it is N=M to need the nozzle quantity openedv/ L × T × 3600, round up number.
3. coal store low pressure CO according to claim 22Local inerting guard method, which is characterized in that the CO2Storage
The liquid CO of device (2) memory storage2Storage is M=Mv×1.3kg。
4. coal store low pressure CO according to claim 12Local inerting guard method, which is characterized in that after step 5 also
Including：The pressure of pressure gauge (6) real-time monitoring tubular road on the pipeline between by-passing valve (5) and the air-heating type gasifier (7)
Power, once pressure is more than preset threshold value, the CO that safety valve (4) is released out in pipeline2, pressure is made to be maintained in threshold range.
5. coal store low pressure CO according to claim 12Local inerting guard method, which is characterized in that the coal store
(1) it is spherical coal store or silo.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810273597.5A CN108238383A (en) | 2018-03-29 | 2018-03-29 | A kind of coal store low pressure CO2Local inerting guard method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810273597.5A CN108238383A (en) | 2018-03-29 | 2018-03-29 | A kind of coal store low pressure CO2Local inerting guard method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108238383A true CN108238383A (en) | 2018-07-03 |
Family
ID=62699142
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810273597.5A Pending CN108238383A (en) | 2018-03-29 | 2018-03-29 | A kind of coal store low pressure CO2Local inerting guard method |
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Citations (9)
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| JPH10300056A (en) * | 1997-04-25 | 1998-11-13 | Iwatani Internatl Corp | Method of extinguishing dust collector in combustion equipment |
| CN201631961U (en) * | 2010-04-10 | 2010-11-17 | 徐州中矿奥特麦科技有限公司 | Coal storage silo safety protection device |
| JP5020268B2 (en) * | 2009-01-23 | 2012-09-05 | 中国電力株式会社 | Coal temperature rise control method in coal bunker |
| CN103285541A (en) * | 2013-06-20 | 2013-09-11 | 中国矿业大学 | A system and a method for active fire extinguishing and explosion suppression in coal mine workplaces |
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| CN203268820U (en) * | 2012-12-26 | 2013-11-06 | 徐州赛森电子自动化技术有限公司 | Low-pressure carbon dioxide inerting protection device for closed coal storage bunker |
| CN203303535U (en) * | 2013-06-20 | 2013-11-27 | 中国矿业大学 | Active fire extinction and explosion suppression system for coal mine workplaces |
| CN107082205A (en) * | 2017-05-18 | 2017-08-22 | 北京工业大学 | A kind of ball storehouse inertia protection device |
| CN206979864U (en) * | 2017-07-21 | 2018-02-09 | 中国神华能源股份有限公司 | A kind of run coal bin monitoring system |
-
2018
- 2018-03-29 CN CN201810273597.5A patent/CN108238383A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10300056A (en) * | 1997-04-25 | 1998-11-13 | Iwatani Internatl Corp | Method of extinguishing dust collector in combustion equipment |
| JP5020268B2 (en) * | 2009-01-23 | 2012-09-05 | 中国電力株式会社 | Coal temperature rise control method in coal bunker |
| CN201631961U (en) * | 2010-04-10 | 2010-11-17 | 徐州中矿奥特麦科技有限公司 | Coal storage silo safety protection device |
| CN203220706U (en) * | 2012-12-26 | 2013-10-02 | 徐州赛森电子自动化技术有限公司 | Low-pressure carbon dioxide fire extinguishing system for closed coal bunker |
| CN203268820U (en) * | 2012-12-26 | 2013-11-06 | 徐州赛森电子自动化技术有限公司 | Low-pressure carbon dioxide inerting protection device for closed coal storage bunker |
| CN103285541A (en) * | 2013-06-20 | 2013-09-11 | 中国矿业大学 | A system and a method for active fire extinguishing and explosion suppression in coal mine workplaces |
| CN203303535U (en) * | 2013-06-20 | 2013-11-27 | 中国矿业大学 | Active fire extinction and explosion suppression system for coal mine workplaces |
| CN107082205A (en) * | 2017-05-18 | 2017-08-22 | 北京工业大学 | A kind of ball storehouse inertia protection device |
| CN206979864U (en) * | 2017-07-21 | 2018-02-09 | 中国神华能源股份有限公司 | A kind of run coal bin monitoring system |
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Application publication date: 20180703 |