CN207051227U - Using coal law of drop temperature experimental provision during liquid carbon dioxide fire-fighting - Google Patents
Using coal law of drop temperature experimental provision during liquid carbon dioxide fire-fighting Download PDFInfo
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- CN207051227U CN207051227U CN201721066200.2U CN201721066200U CN207051227U CN 207051227 U CN207051227 U CN 207051227U CN 201721066200 U CN201721066200 U CN 201721066200U CN 207051227 U CN207051227 U CN 207051227U
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- carbon dioxide
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- liquid carbon
- surge tank
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Abstract
The utility model discloses a kind of coal law of drop temperature experimental provision using during liquid carbon dioxide fire-fighting, including gaseous carbon dioxide storage tank, liquid carbon dioxide storage tank, surge tank and test container, the gas outlet of gaseous carbon dioxide storage tank is connected by gas-phase transport pipe with the gas phase import of surge tank, the liquid outlet of liquid carbon dioxide storage tank is connected by liquid phase delivery pipe with the fluid inlet of surge tank, installation of relief valve on surge tank, the bottom of surge tank sets outlet valve, access tube is set on test container, outlet valve is connected with access tube by pressure injection pipe, set on access tube and screw valve, multiple temperature sensors are set in test container, multiple temperature sensors connect with temperature polling instrument.Experimental provision simulation is put out a fire using liquid carbon dioxide to the coal after spontaneous combustion in colliery, to find out liquid carbon dioxide coal temperature changing rule caused by rapid phase transition in pourable medium.
Description
Technical field
The utility model belongs to the technical field that coal mine fire fighting is carried out using liquid carbon dioxide, is specifically related to one kind and adopts
With coal law of drop temperature experimental provision during liquid carbon dioxide fire-fighting.
Background technology
Coal spontaneous combustion fire is as one of global disaster, and it is not only to coal resources, production equipment, ventilating system and air
Environment causes serious destruction, or even the major accident that can cause casualties.In existing preventing and extinguishing fire of coal mine technical method, liquid
Carbon dioxide process is shown greatly excellent due to that can realize fast cooling on the basis of inerting in the improvement of Mine Fire Area
Gesture.
At present, straight fluid injection state CO 2 technology serves important function in preventing and treating coal spontaneous combustion work, but for liquid
The specific rule that carbon dioxide cools to high temperature coal body is grasped not clear.First, near liberation port liquid carbon dioxide phase
Though becoming, the phenomenon time is extremely short, and change is violent, and changed dramatically in environment temperature.And the physical parameter and oxidation heat liberation of coal body are special
Property is very sensitive to temperature.But lack at present for coal body caused by rapid phase transition of the liquid carbon dioxide in pourable medium
The research of the contents such as temperature change.Secondly, after liquid carbon dioxide release, it flows to be stressed drives jointly with phase transformation, in addition
The complicated seepage channel environment of porous media.Cause to grasp carbon dioxide percolation law in pourable medium it is unclear, and then can not
The mass-and heat-transfer process of carbon dioxide in effective Study on Coal body.Cause the main region of absorbing and cooling temperature and a wide range of gas in coal body
Relation between the loss behavior of body and perfusion condition fails to understand, so as to can not scientifically design the burst size of liquid carbon dioxide,
The technological parameter such as off-position and release strength.The effect using carbon dioxide fire prevention and extinguishment technology has not only been had a strong impact on, once
The leakage of generation working face has then had a strong impact on system safety.
After coal body spontaneous combustion, caused temperature change feature and the distribution of coal body initial temperature, note after liquid carbon dioxide injection
It is very close to enter position, bore, pressure injection flow, pressure and other parameters relation, its influence factor is more, and physical process is complicated, and scene is surveyed
It is too strong to try randomness, accurate data can not be obtained.Therefore, it is necessary to enough discharge irrelevant factor using the method for physical simulation experiment
Influence, analyze the complex relationship and changing rule between phenomenon and each physical quantity, after analyzing straight note liquid carbon dioxide, high temperature
The changing rule of coal body cooling scope.
Utility model content
The purpose of this utility model is to overcome above-mentioned deficiency of the prior art, there is provided one kind uses liquid carbon dioxide
Coal law of drop temperature experimental provision during fire extinguishing.Experimental provision simulation is entered using liquid carbon dioxide to the coal after spontaneous combustion in colliery
Row fire extinguishing, to find out liquid carbon dioxide coal temperature changing rule caused by rapid phase transition in pourable medium.
To achieve the above object, the technical solution adopted in the utility model is：Using coal during liquid carbon dioxide fire-fighting
Law of drop temperature experimental provision, it is characterised in that：Including gaseous carbon dioxide storage tank, liquid carbon dioxide storage tank, surge tank and survey
Container is tried, the gas outlet of the gaseous carbon dioxide storage tank is connected by gas-phase transport pipe with the gas phase import of surge tank, institute
State and outlet shut-off valve is provided with the gas outlet of gaseous carbon dioxide storage tank, the liquid outlet of the liquid carbon dioxide storage tank passes through
Liquid phase delivery pipe is connected with the fluid inlet of surge tank, and the liquid outlet of the liquid carbon dioxide storage tank is provided with out liquid shut-off
Valve, atmospheric valve is provided with the surge tank, the bottom of the surge tank is provided with outlet valve, is provided with the test container
Access tube, the outlet valve and the access tube are connected by pressure injection pipe, are provided with the access tube and are screwed valve, the survey
The coal body that is provided for heating in it has made the electrically heated rod of coal spontaneous combustion and for detecting temperature change after coal spontaneous combustion in examination container
Multiple temperature sensors, multiple temperature sensors connect with temperature polling instrument.
It is above-mentioned using coal law of drop temperature experimental provision during liquid carbon dioxide fire-fighting, it is characterised in that：The buffering
The inside of pot sidewall is embedded with electrical heating wire.
It is above-mentioned using coal law of drop temperature experimental provision during liquid carbon dioxide fire-fighting, it is characterised in that：The pressure injection
Temperature transmitter and pressure transmitter are provided with pipe, pressure gauge is provided with the surge tank.
It is above-mentioned using coal law of drop temperature experimental provision during liquid carbon dioxide fire-fighting, it is characterised in that：The test
The multiple measuring point fixed mounts laid along its short transverse interval are provided with container, multiple temperature sensors are laid in described
On measuring point fixed mount.
It is above-mentioned using coal law of drop temperature experimental provision during liquid carbon dioxide fire-fighting, it is characterised in that：The access
The quantity of pipe is multiple, and multiple access tubes are laid along its short transverse at the bottom interval of the test container.
It is above-mentioned using coal law of drop temperature experimental provision during liquid carbon dioxide fire-fighting, it is characterised in that：The access
The outer wall of pipe is provided with external screw thread, and the screwed hole for being threadedly coupled with the access tube is offered on the test container.
It is above-mentioned using coal law of drop temperature experimental provision during liquid carbon dioxide fire-fighting, it is characterised in that：Also include electricity
Sub-platform scale, the liquid carbon dioxide storage tank are placed on the electronic platform scale.
It is above-mentioned using coal law of drop temperature experimental provision during liquid carbon dioxide fire-fighting, it is characterised in that：The test
The side wall of container includes internal layer retaining wall and outer layer retaining wall, and heat-preservation cotton is provided between the internal layer retaining wall and the outer layer retaining wall.
In order to effectively be realized that the utility model additionally provides one kind using above-mentioned experimental provision
The utility model has advantages below compared with prior art：
1st, the utility model is by being passed through liquid carbon dioxide into test container, so that by liquid carbon dioxide to surveying
Coal body in examination container after spontaneous combustion is put out a fire, and by the temperature sensor in test container to the coal body temperature in test container
Degree is detected, and then simulates and the coal after spontaneous combustion in colliery is put out a fire by liquid carbon dioxide, to find out liquid dioxy
Change carbon coal temperature changing rule caused by rapid phase transition in pourable medium.
2nd, the utility model is by setting electrical heating wire, by being powered to electrical heating wire, and then heats buffering tank, with
Realize to the liquid carbon dioxide heating and gasifying in surge tank, so as to increase the pressure in surge tank, avoid liquid carbon dioxide
Icing phenomenon is produced due to hypotony in course of conveying.
3rd, the utility model can so be led to by setting multiple access tubes on test container with observation of liquid state carbon dioxide
Enter when entering pipe of different height, caused coal temperature situation of change.
4th, access tube of the present utility model is threadedly coupled with test container, so can be by changing the accesses of different inner diameters
Pipe, when liquid carbon dioxide is passed through into test container by different inner diameters access tube to observe, the cooling change of coal temperature
Rule.
5th, the utility model is by setting electronic platform scale come observation of liquid state carbon dioxide storage tank weight change, to know liquid
The output quantity of state carbon dioxide.
Below by drawings and examples, the technical solution of the utility model is described in further detail.
Brief description of the drawings
Fig. 1 is the structural representation of the utility model coal law of drop temperature experimental provision.
Fig. 2 is the cross-sectional view of test container in the utility model coal law of drop temperature experimental provision.
Fig. 3 is method flow diagram when being tested using the utility model.
Description of reference numerals:
1-gaseous carbon dioxide storage tank；2-outlet shut-off valve；3-gas-phase transport pipe；
4-liquid carbon dioxide storage tank；5-electronic platform scale；6-go out liquid shut-off valve；
7-liquid phase delivery pipe；8-surge tank；9-atmospheric valve；
10-outlet valve；11-pressure gauge；12-pressure injection pipe；
13-temperature transmitter；14-pressure transmitter；15-access tube；
16-screw valve；17-test container；17-1-internal layer retaining wall；
17-2-outer layer retaining wall；17-3-heat-preservation cotton；18-measuring point fixed mount；
19-temperature sensor.
Embodiment
A kind of coal law of drop temperature experimental provision using during liquid carbon dioxide fire-fighting as shown in Figure 1, including gaseous state two
Carbonoxide storage tank 1, liquid carbon dioxide storage tank 4, surge tank 8 and test container 17, the outlet of the gaseous carbon dioxide storage tank 1
Mouth is connected by gas-phase transport pipe 3 with the gas phase import of surge tank 8, is set at the gas outlet of the gaseous carbon dioxide storage tank 1
Outlet shut-off valve 2 is equipped with, the liquid outlet of the liquid carbon dioxide storage tank 4 is entered by liquid phase delivery pipe 7 and the liquid phase of surge tank 8
Mouth is connected, and the liquid outlet of the liquid carbon dioxide storage tank 4 is provided with out liquid shut-off valve 6, is provided with and puts on the surge tank 8
Empty valve 9, the bottom of the surge tank 8 are provided with outlet valve 10, access tube 15, the outlet are provided with the test container 17
Valve 10 is connected with the access tube 15 by pressure injection pipe 12, is provided with the access tube 15 and is screwed valve 16, and the test is held
Being provided for heating the coal body in it in device 17 has made the electrically heated rod of coal spontaneous combustion and for detecting temperature change after coal spontaneous combustion
Multiple temperature sensors 19, multiple temperature sensors 19 connect with temperature polling instrument.
In the present embodiment, the coal law of drop temperature experimental provision by being passed through liquid carbon dioxide into test container 17, from
And the coal body after spontaneous combustion in test container 17 is put out a fire by liquid carbon dioxide, and pass through the temperature in test container 17
Sensor 19 detects to the coal temperature in test container 17, and then simulates by liquid carbon dioxide to spontaneous combustion in colliery
Coal afterwards is put out a fire, to find out liquid carbon dioxide coal temperature changing rule caused by rapid phase transition in pourable medium.
In the present embodiment, the inside of the side wall of surge tank 8 is embedded with electrical heating wire.By setting electrical heating wire, by right
Electrical heating wire is powered, and then heats the tank body of surge tank 8, to realize to the liquid carbon dioxide heating and gasifying in surge tank 8, so as to
Increase the pressure in surge tank 8, avoid liquid carbon dioxide in course of conveying due to hypotony and produce icing phenomenon.
As shown in figure 1, temperature transmitter 13 and pressure transmitter 14 are provided with the pressure injection pipe 12, the surge tank 8
On be provided with pressure gauge 11.
With reference to Fig. 1 and Fig. 2, the multiple measuring points laid along its short transverse interval are provided with the test container 17 and are fixed
Frame 18, multiple temperature sensors 19 are laid on the measuring point fixed mount 18.
In the present embodiment, by setting multiple measuring point fixed mounts 18, can effective mounting temperature sensor 19, and by
Laid in its short transverse interval of multiple measuring point fixed mounts 18 along test container 17, it is ensured that temperature sensor 19 can be comprehensive
The whole test container 17 of detection in coal temperature.In the present embodiment, the measuring point of the measuring point fixed mount 18 has 32, corresponds to
, the quantity of the temperature sensor 19 is 32.
As shown in figure 1, the quantity of the access tube 15 is multiple, multiple access tubes 15 are along its short transverse described
Lay at the bottom interval of test container 17.By setting multiple access tubes 15, correspondingly it is provided with each access tube 15 and screws valve
16, it can so observe, liquid carbon dioxide is passed through when entering pipe 15 of different height, caused coal temperature change feelings
Condition.
In the present embodiment, the outer wall of the access tube 15 is provided with external screw thread, offers and is used on the test container 17
The screwed hole being threadedly coupled with the access tube 15.The purpose so designed is that it is possible to facilitate the replacing of access tube 15, and leads to
The access tube 15 for changing different inner diameters is crossed, liquid dioxy is passed through into test container 17 by different inner diameters access tube 15 to observe
When changing carbon, the cooling changing rule of coal temperature.
As shown in figure 1, the experimental provision, in addition to electronic platform scale 5, the liquid carbon dioxide storage tank 4 are placed on institute
State on electronic platform scale 5.By setting electronic platform scale 5 come the weight change of observation of liquid state carbon dioxide storage tank 4, to know liquid
The output quantity of carbon dioxide.
As shown in Fig. 2 the side wall of the test container 17 includes internal layer retaining wall 17-1 and outer layer retaining wall 17-2, the internal layer
Heat-preservation cotton 17-3 is provided between retaining wall 17-1 and the outer layer retaining wall 17-2.It is good to be so able to ensure that test container 17 has
Heat insulation effect, avoid test container 17 from carrying out heat exchange with extraneous and influence the authenticity of experimental data.
A kind of method tested using coal law of drop temperature experimental provision as described above as shown in Figure 3, it is characterised in that
Comprise the following steps：
Step 1: the electrically heated rod electrified regulation in test container 17, so that the coal in test container 17 starts spontaneous combustion；
Step 2: the outlet shut-off valve 2 for screwing valve 16, opening on gaseous carbon dioxide storage tank 1 closed on access tube 15
With the atmospheric valve 9 on the surge tank 8, gaseous carbon dioxide is set to enter surge tank 8, then by atmospheric valve 9 from the row of surge tank 8
Go out；
In two the present embodiment the step of, by being passed through gaseous carbon dioxide into surge tank 8, so as to effectively arrange
The foreign gas gone out in surge tank 8, generally, it is necessary to ventilate 5 minutes.Simultaneously, additionally it is possible to drop the temperature of surge tank 8
It is low, so as to be advantageous to the entrance of liquid carbon dioxide.
Step 3: close atmospheric valve 9；
Step 4: close the outlet shut-off valve 2 on gaseous carbon dioxide storage tank 1；
In the present embodiment, atmospheric valve 9 is first closed, turns off outlet shut-off valve 2, so can be preset one in surge tank 8
Fixed pressure, prevent 2MPa liquid phase CO2 from directly forming dry ice after entering surge tank 8.
Go out liquid shut-off valve 6 on liquid carbon dioxide storage tank 4 Step 5: opening, liquid titanium dioxide is injected into surge tank 8
Carbon；
Step 6: the outlet valve 10 of the bottom of surge tank 8 is opened, so that surge tank 8 is identical with the pressure in pressure injection pipe 12；
In six the present embodiment the step of, because now surge tank 8 is identical with the pressure in pressure injection pipe 12, become by temperature
Device 13 and pressure transmitter 14 is sent to record the original state of pressure and temperature, as pressure injection in now pressure injection pipe 12.
Valve 16 is screwed on access tube 15 Step 7: opening, liquid carbon dioxide is passed through in test container 17；
In seven the present embodiment the step of, it can also lead to while liquid carbon dioxide is passed through into test container 17
Cross electronic platform scale 5 and record the quality change situation of liquid carbon dioxide storage tank 4, and then draw the liquid carbon dioxide of output
Amount.The aperture for screwing valve 16 can not be changed in pressure injection process, to avoid influenceing pressure injection flow.
Step 8: the temperature signal that each temperature sensor 19 collects in test container 17 is obtained by temperature polling instrument.
In step 4, the pressure gauge 11 on surge tank 8 is looked first at, when pressure rises to 0.5MPa in surge tank 8, then
Close the outlet shut-off valve 2；Before step 6, by the electrical heating wire in the side wall of surge tank 8 to the liquid in surge tank 8
Carbon dioxide is heated, and makes operative liquid carbon dioxide gasification, and when the pressure in surge tank 8 reaches 2MPa, the electricity adds
Heated filament powers off.
In the present embodiment, by being powered to electrical heating wire, and then the tank body of surge tank 8 is heated, to realize in surge tank 8
Liquid carbon dioxide heating and gasifying, so that the pressure in surge tank 8 reaches 2MPa, liquid carbon dioxide is avoided in course of conveying
In icing phenomenon produced due to hypotony.
It is described above, only it is preferred embodiment of the present utility model, not the utility model is imposed any restrictions, every
Any simple modification, change and the equivalent structure transformation made according to the utility model technical spirit to above example, still
Belong in the protection domain of technical solutions of the utility model.
Claims (8)
1. using coal law of drop temperature experimental provision during liquid carbon dioxide fire-fighting, it is characterised in that：Including gaseous carbon dioxide
Storage tank (1), liquid carbon dioxide storage tank (4), surge tank (8) and test container (17), the gaseous carbon dioxide storage tank (1)
Gas outlet is connected by gas-phase transport pipe (3) with the gas phase import of surge tank (8), the gaseous carbon dioxide storage tank (1)
Outlet shut-off valve (2) is provided with gas outlet, the liquid outlet of the liquid carbon dioxide storage tank (4) passes through liquid phase delivery pipe (7)
It is connected with the fluid inlet of surge tank (8), the liquid outlet of the liquid carbon dioxide storage tank (4) is provided with out liquid shut-off valve
(6) atmospheric valve (9), is provided with the surge tank (8), the bottom of the surge tank (8) is provided with outlet valve (10), the survey
Access tube (15) is provided with examination container (17), the outlet valve (10) is connected with the access tube (15) by pressure injection pipe (12)
Connect, be provided with the access tube (15) and screw valve (16), be provided for heating the coal body in it in the test container (17)
The electrically heated rod of coal spontaneous combustion and multiple temperature sensors (19) for detecting temperature change after coal spontaneous combustion, multiple temperature are made
Degree sensor (19) connects with temperature polling instrument.
2. the coal law of drop temperature experimental provision according to claim 1 using during liquid carbon dioxide fire-fighting, its feature exists
In：The inside of surge tank (8) side wall is embedded with electrical heating wire.
3. the coal law of drop temperature experimental provision according to claim 1 using during liquid carbon dioxide fire-fighting, its feature exists
In：Temperature transmitter (13) and pressure transmitter (14) are provided with the pressure injection pipe (12), is provided with the surge tank (8)
Pressure gauge (11).
4. the coal law of drop temperature experimental provision according to claim 1 using during liquid carbon dioxide fire-fighting, its feature exists
In：The multiple measuring point fixed mounts (18) laid along its short transverse interval are provided with the test container (17), it is multiple described
Temperature sensor (19) is laid on the measuring point fixed mount (18).
5. the coal law of drop temperature experimental provision according to claim 1 using during liquid carbon dioxide fire-fighting, its feature exists
In：The quantity of the access tube (15) is multiple, and multiple access tubes (15) are along its short transverse in the test container
(17) lay at bottom interval.
6. the coal law of drop temperature experimental provision according to claim 1 using during liquid carbon dioxide fire-fighting, its feature exists
In：The outer wall of the access tube (15) is provided with external screw thread, offers and is used for and the access tube on the test container (17)
(15) screwed hole of threaded connection.
7. the coal law of drop temperature experimental provision according to claim 1 using during liquid carbon dioxide fire-fighting, its feature exists
In：Also include electronic platform scale (5), the liquid carbon dioxide storage tank (4) is placed on the electronic platform scale (5).
8. the coal law of drop temperature experimental provision according to claim 1 using during liquid carbon dioxide fire-fighting, its feature exists
In：The side wall of the test container (17) includes internal layer retaining wall (17-1) and outer layer retaining wall (17-2), the internal layer retaining wall (17-
1) heat-preservation cotton (17-3) is provided between the outer layer retaining wall (17-2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721066200.2U CN207051227U (en) | 2017-08-24 | 2017-08-24 | Using coal law of drop temperature experimental provision during liquid carbon dioxide fire-fighting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721066200.2U CN207051227U (en) | 2017-08-24 | 2017-08-24 | Using coal law of drop temperature experimental provision during liquid carbon dioxide fire-fighting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207051227U true CN207051227U (en) | 2018-02-27 |
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ID=61503412
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721066200.2U Expired - Fee Related CN207051227U (en) | 2017-08-24 | 2017-08-24 | Using coal law of drop temperature experimental provision during liquid carbon dioxide fire-fighting |
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| Country | Link |
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| CN (1) | CN207051227U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107328814A (en) * | 2017-08-24 | 2017-11-07 | 西安科技大学 | Using the coal law of drop temperature experimental provision and method during liquid carbon dioxide fire-fighting |
| CN108843369A (en) * | 2018-05-24 | 2018-11-20 | 山东科技大学 | A kind of mining liquid CO2The straight injection system in ground and method |
| CN110145683A (en) * | 2019-05-16 | 2019-08-20 | 贵州大学 | A kind of coal mine moving formula carbon dioxide storage tank |
-
2017
- 2017-08-24 CN CN201721066200.2U patent/CN207051227U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107328814A (en) * | 2017-08-24 | 2017-11-07 | 西安科技大学 | Using the coal law of drop temperature experimental provision and method during liquid carbon dioxide fire-fighting |
| CN108843369A (en) * | 2018-05-24 | 2018-11-20 | 山东科技大学 | A kind of mining liquid CO2The straight injection system in ground and method |
| CN110145683A (en) * | 2019-05-16 | 2019-08-20 | 贵州大学 | A kind of coal mine moving formula carbon dioxide storage tank |
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Granted publication date: 20180227 Termination date: 20180824 |