CN104880543A - Experiment device and method for underground coal mine CO source mechanism and disappearing mechanism research - Google Patents
Experiment device and method for underground coal mine CO source mechanism and disappearing mechanism research Download PDFInfo
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- CN104880543A CN104880543A CN201510332744.8A CN201510332744A CN104880543A CN 104880543 A CN104880543 A CN 104880543A CN 201510332744 A CN201510332744 A CN 201510332744A CN 104880543 A CN104880543 A CN 104880543A
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Abstract
The invention discloses an experiment device for underground coal mine CO source mechanism and disappearing mechanism research. The experiment device comprises a sealed box, wherein a cutting tool is arranged in the sealed box, a crusher is arranged in the sealed box, a crushing chamber is arranged on the crusher, a heating device is arranged on the crushing chamber, and an exhaust pipe, a gas taking pipe and two gas inlet pipes are arranged on the sealed box. The experiment device is used for providing a necessary and sufficient experiment environment for underground coal mine CO source mechanism and disappearing mechanism research. The invention further discloses an experiment method for underground coal mine CO source mechanism and disappearing mechanism research. Crushing treatment is conducted on a coal sample in an anaerobic environment under certain temperature condition, the CO gas concentration of the gas released out of the crushing chamber is detected, and the experiment method is simple and convenient. According to the experiment method for underground coal mine CO source mechanism and disappearing mechanism research, the coal sample is subjected to crushing treatment in the anaerobic environment, the crushing chamber is filled with nitrogen, then the coal sample is heated, then the concentration of the gas released out of the crushing chamber is detected, and the experiment method is simple and convenient.
Description
Technical field
The invention belongs to underground coal mine CO to originate mechanism and disappearance study mechanism technical field, be specifically related to a kind of underground coal mine CO and originate mechanism and disappearance study mechanism experimental provision and method.
Background technology
Can produce a large amount of toxic and harmfuls during the spontaneous combustion of remaining coal of coal mine gob, CO gas problem is the most outstanding.In order to control the goaf condition of a fire timely and effectively, can close workplace if desired, minimizing is leaked out, and takes related syndrome fire suppression measures, to reach the object of fire extinguishing to ignition region.Now, goaf just defines a relatively airtight space.Practice shows, in fire extinguishing procedure, CO gas in goaf can rapidly disappear, and also indefinite at present to its disappearance mechanism, and scholars have two kinds of viewpoints: one is owing to leaking out the distinguished and admirable CO gas that dilutes, and take it out of goaf from return; Two is that CO in goaf is lost coal absorption, thus can't detect.
In addition, for the research that goaf CO originates, relevant scholar holds a different view.What have thinks in coalification course, composes and have CO gas in raw coal; Somebody then thinks, when raw coal is disclosed, contacts with air, and oxidation generates CO.How studying underground coal mine CO to originate, and goaf CO disappearance mechanism, is various equivalent modifications technical matters urgently to be resolved hurrily.
Summary of the invention
The object of the invention is to overcome above-mentioned deficiency of the prior art, a kind of underground coal mine CO source mechanism and disappearance study mechanism experimental provision are provided.This experimental provision can effectively realize anoxybiotic environment in use, and can to the fragmentation effectively realized coal sample, the heating to coal sample can also be realized simultaneously, thus be that research underground coal mine CO source mechanism and disappearance mechanism provide necessary and sufficient experimental situation, its structure is simple, and experiment effectiveness is high.
For achieving the above object, the technical scheme that underground coal mine CO source mechanism of the present invention and disappearance study mechanism experimental provision adopt is: underground coal mine CO source mechanism and disappearance study mechanism experimental provision, it is characterized in that: comprise seal box, described seal box is made up of the casing of one end open and the sealed platform cover for closing described opening, described seal box offers two handle holes, described handle hole is sealedly connected with gloves, the cutting tool cut away by coal sample surface coal body for having on described gloves for operating personnel is placed with in described seal box, disintegrating machine for carrying out break process to the coal sample removing surperficial coal body is installed in described seal box, described disintegrating machine is provided with the crushing chamber for holding coal sample, described crushing chamber is provided with for the heating arrangement heated it and then make coal sample heat up, described seal box is provided with the first draft tube for nitrogen being led to seal box, for the mixed gas of CO gas and nitrogen or nitrogen being led to the second draft tube of described crushing chamber, gas in described crushing chamber is discharged to that seal box is outside gets tracheae for what detect CO gas concentration by the gas outlet and being used for for the gas in described seal box being discharged to seal box outside.
Above-mentioned underground coal mine CO source mechanism and disappearance study mechanism experimental provision, it is characterized in that: described disintegrating machine comprises the base be arranged in casing and the motor be arranged on described base, described crushing chamber is arranged on the casing of described motor, the output shaft of described motor stretches into described crushing chamber and is provided with broken blade at the position stretching into described crushing chamber, described crushing chamber is provided with crushing chamber gland bonnet.
Above-mentioned underground coal mine CO source mechanism and disappearance study mechanism experimental provision, is characterized in that: comprise the temperature sensor for measuring coal sample temperature, described crushing chamber gland bonnet being provided with the jack inserted for described temperature sensor.
Above-mentioned underground coal mine CO source mechanism and disappearance study mechanism experimental provision, is characterized in that: described heating arrangement adopts the electrical heating wire be wrapped on described crushing chamber outer wall.
Above-mentioned underground coal mine CO source mechanism and disappearance study mechanism experimental provision, is characterized in that: described electrical heating wire comprises nichrome alloy belt and is wrapped in the insulator outside described nichrome alloy belt, and described insulator is made up of multilayer alkali-free glass fibre.
Above-mentioned underground coal mine CO source mechanism and disappearance study mechanism experimental provision, is characterized in that: described casing is transparent configuration.
Above-mentioned underground coal mine CO source mechanism and disappearance study mechanism experimental provision, is characterized in that: described casing and described sealed platform cover Flange joint.
The invention also discloses a kind of experimental technique studying underground coal mine CO source mechanism, this experimental technique is by carrying out break process at different temperatures to the identical coal sample in same colliery, and then the change of Analysis for CO gas concentration, and then research is for identical coal sample in a certain specific colliery, its CO gas concentration is produced by disengaging coal body adsorbed state, or produced by chemical bond rupture.This experimental technique, easy and simple to handle, effectively can completely cut off the interference of extraneous factor, experimental result accurately and reliably.
For achieving the above object, the technical scheme that the experimental technique that the present invention studies underground coal mine CO source mechanism adopts is: a kind of experimental technique studying underground coal mine CO source mechanism, it is characterized in that: by utilizing above-mentioned experimental provision under temperature T condition, coal sample is tested, a corresponding coal sample of temperature T is successively tested multiple identical coal sample, described temperature T successively increases progressively with the increase of experiment number, and wherein the experimental technique of each coal sample comprises the following steps:
Step one, coal sample to be measured is loaded in seal box, then sealed platform cover sealing is arranged on casing;
Step 2, in seal box, be filled with nitrogen by the first draft tube, and by gas outlet by the air emptying in seal box;
Step 3, operating personnel stretch in seal box after putting on the gloves be connected on handle hole, and use cutting tool to be cut away by the coal body on described coal sample surface;
Step 4, the coal sample that surperficial coal body cuts away is put into crushing chamber, and continue to pass into nitrogen by the second draft tube in crushing chamber, the air in crushing chamber is by getting tracheae emptying;
Step 5, startup heating arrangement heat crushing chamber to make coal sample be warming up to temperature T;
Step 6, startup disintegrating machine carry out break process to the coal sample in crushing chamber;
Step 7, collection get the gas that tracheae is discharged, and detect the CO gas concentration C in the described gas of discharging;
Adopt above-mentioned steps one to step 7 to after multiple identical coal sample experiment, with temperature T for horizontal ordinate, with CO gas concentration C for ordinate, draw the change curve of CO gas concentration C with temperature T, if described change curve has peak value to occur, then the CO gas comprising and produce by departing from coal body adsorbed state is described in the CO gas of generation; If described change curve occurs straight-line segment or smooth curve section, then the CO gas comprising in the CO gas of generation and produced by chemical bond rupture is described.
The invention also discloses a kind of experimental technique studying underground coal mine CO disappearance mechanism, this experimental technique is by analyzing the CO gas concentration change of discharge at different temperatures to the identical coal sample in same colliery, and then detect coal body to CO gas sorption ability, and then research is for identical coal sample in a certain specific colliery, whether its CO gas disappears is because the reason of absorption.This experimental technique, easy and simple to handle, effectively can completely cut off the interference of extraneous factor, experimental result accurately and reliably.
For achieving the above object, the technical scheme that the experimental technique that the present invention studies underground coal mine CO disappearance mechanism adopts is: a kind of research method of underground coal mine CO disappearance mechanism, it is characterized in that, by utilizing above-mentioned experimental provision under temperature T condition, coal sample is tested, a corresponding coal sample of temperature T is successively tested multiple identical coal sample, described temperature T successively increases progressively with the increase of experiment number, and wherein the experimental technique of each coal sample comprises the following steps:
Step one, coal sample to be measured is loaded in seal box, then sealed platform cover sealing is arranged on casing;
Step 2, in seal box, be filled with nitrogen by the first draft tube, by gas outlet by the air emptying in seal box;
Step 3, operating personnel stretch in seal box after putting on the gloves be connected on handle hole, use cutting tool to be cut away by coal sample surface coal body;
Step 4, the coal sample that surperficial coal body cuts away is put into crushing chamber, and start disintegrating machine break process is carried out to the coal sample in crushing chamber;
Step 5, in crushing chamber, pass into nitrogen by the second draft tube, by getting the air in tracheae emptying crushing chamber;
Step 6, startup heating arrangement heat crushing chamber to make coal sample be warming up to temperature T;
Step 7, in crushing chamber, passed into the mixed gas of nitrogen and CO gas by the second draft tube;
Step 8, collection get the gas that tracheae is discharged, and detect the CO gas concentration C in the described gas of discharging;
Adopt above-mentioned steps one to step 8 to after multiple coal sample experiment, the ability of coal body CO absorption gas is observed according to the numerical value change of recorded CO gas concentration C, namely the ability of the numerical value change of CO gas concentration C large explanation coal body CO absorption gas is strong, the ability of the numerical value change little explanation coal body CO absorption gas of CO gas concentration C is weak, the numerical value of CO gas concentration C is unchanged then illustrates coal body to CO gas without absorption, thus judges underground coal mine CO disappearance whether because coal body disappears to CO gas.
The present invention compared with prior art has the following advantages:
1, the structure of experimental provision of the present invention is simple, rationally novel in design.
2, experimental provision of the present invention realizes anoxybiotic environment by seal box and the mode that is filled with nitrogen, by the disintegrating machine that is provided with crushing chamber coal sample realized to the break process under anoxybiotic environment, and by heating arrangement, coal sample is heated, thus prerequisite experimental situation when effectively meeting the experiment of research underground coal mine CO source mechanism and disappearance mechanism, its structure is simple, convenient operation.
3, crusher structure of the present invention is simple, effectively can realize the break process to coal body, easy to operate.
4, casing of the present invention is transparent configuration.Concrete, described casing is made up of organic glass.Can handled easily personnel observe like this, such as have gloves on coal sample is cut time, conveniently can observe effectively to cut, when coal sample is put into crushing chamber, observation also can be facilitated to carry out fast operating.
5, the experimental technique of research underground coal mine CO source of the present invention mechanism, it by carrying out break process to coal sample under anoxybiotic environment under uniform temperature condition, and then detect the concentration of CO gas in the gas that discharged by crushing chamber, by testing the change of the concentration observing CO gas to different coal sample, and then research underground coal mine CO is produced by disengaging coal body adsorbed state, or produced by chemical bond rupture, its experimental technique is easy, simple to operate.
6, the experimental technique of research underground coal mine CO disappearance mechanism of the present invention, it by carrying out break process to coal sample under anoxybiotic environment, after subsequently inflated with nitrogen process being carried out to crushing chamber, again coal sample is heated, and then detect the concentration of CO gas in the gas that discharged by crushing chamber, by testing the change of the concentration observing CO gas to different coal sample, and then the adsorptive power of coal sample to CO gas can be drawn, and then whether the disappearance of research underground coal mine CO is because the absorption of coal sample to CO gas causes, its experimental technique is easy, simple to operate.
Below by drawings and Examples, technical scheme of the present invention is described in further detail.
Accompanying drawing explanation
Fig. 1 is the structural representation of experimental provision of the present invention.
Fig. 2 is the structural representation of disintegrating machine of the present invention.
Fig. 3 is the cross-sectional structure schematic diagram of electrical heating wire of the present invention.
Fig. 4 is that the present invention studies in the experimental technique of underground coal mine CO source mechanism method flow diagram during each coal sample experiment.
Fig. 5 is that the present invention studies in the experimental technique of underground coal mine CO disappearance mechanism method flow diagram during each coal sample experiment.
Description of reference numerals:
1-seal box; 1-1-casing; 1-2-sealed platform cover;
2-handle hole; 3-gloves; 4-the first draft tube;
5-get tracheae; 6-the second draft tube; 7-gas outlet;
8-crushing chamber; 9-base; 10-motor;
11-broken blade; 12-electrical heating wire; 12-1-nichrome alloy belt;
12-2-insulator; 13-crushing chamber gland bonnet; 14-jack;
15-draft tube joint; 16-get gas-tpe fitting.
Embodiment
A kind of underground coal mine CO source mechanism as shown in Figure 1 and disappearance study mechanism experimental provision, comprise seal box 1, described seal box 1 is made up of the casing 1-1 of one end open and the sealed platform cover 1-2 for closing described opening, described seal box 1 offers two handle holes 2, described handle hole 2 is sealedly connected with gloves 3, the cutting tool cut away by coal sample surface coal body for having on described gloves 3 for operating personnel is placed with in described seal box 1, disintegrating machine for carrying out break process to the coal sample removing surperficial coal body is installed in described seal box 1, described disintegrating machine is provided with the crushing chamber 8 for holding coal sample, described crushing chamber 8 is provided with for the heating arrangement heated it and then make coal sample heat up, described seal box 1 is provided with the first draft tube 4 for nitrogen being led to seal box 1, for the mixed gas of CO gas and nitrogen or nitrogen being led to the second draft tube 6 of described crushing chamber 8, gas in described crushing chamber 8 is discharged to seal box 1 outside for what detect CO gas concentration and gets tracheae 5 by the gas outlet 7 and being used for for the gas in described seal box 1 being discharged to seal box 1 outside.
In the present embodiment, this experimental provision can effectively realize anoxybiotic environment in use, and can to the fragmentation effectively realized coal sample, the heating to coal sample can also be realized simultaneously, thus be that research underground coal mine CO source mechanism and disappearance mechanism provide necessary and sufficient experimental situation, its structure is simple, and experiment effectiveness is high.
In the present embodiment, described first draft tube 4, second draft tube 6, gas outlet 7 and get block that tracheae 5 has all been threaded.Described cutting tool adopts minitype cutting machine.Rubber gloves selected by described gloves 3.
As shown in Figure 2, described disintegrating machine comprises the base 9 be arranged in casing 1-1 and the motor 10 be arranged on described base 9, described crushing chamber 8 is arranged on the casing of described motor 10, the output shaft of described motor 10 stretches into described crushing chamber 8 and is provided with broken blade 11 at the position stretching into described crushing chamber 8, and described crushing chamber 8 is provided with crushing chamber gland bonnet 13.
In the present embodiment, described crusher structure is simple, effectively can realize the break process to coal body, easy to operate.Described crushing chamber gland bonnet 13 is provided with draft tube joint 15 for being connected with the first draft tube 4 and for get that tracheae 5 is connected get gas-tpe fitting 16.
As shown in Figure 2, this underground coal mine CO source mechanism and disappearance study mechanism experimental provision comprise the temperature sensor for measuring coal sample temperature, described crushing chamber gland bonnet 13 are provided with the jack 14 inserted for described temperature sensor.By set temperature sensor, effectively can detect the actual temp of coal sample, and then can with under the cooperation of temperature controller, and then control heating arrangement 12 and work or stop.
In the present embodiment, described heating arrangement adopts the electrical heating wire 12 be wrapped on described crushing chamber 8 outer wall.As shown in Figure 3, concrete, described electrical heating wire 12 comprises nichrome alloy belt 12-1 and is wrapped in the insulator 12-2 outside described nichrome alloy belt 12-1, and described insulator 12-2 is made up of multilayer alkali-free glass fibre.Wherein, it is fast that described nichrome alloy belt 12-1 has heating, and the features such as the thermal efficiency is high, long service life, the insulator 12-2 be made up of multilayer alkali-free glass fibre, has good resistance to elevated temperatures and reliable insulating property.Its structurally flexible, heating effect is good, can heat the outside surface being wrapped in described crushing chamber 8 of direct convenience during use.
In the present embodiment, described casing 1-1 is transparent configuration.Concrete, described casing 1-1 is made up of organic glass.Handled easily personnel can observe like this, such as when the 3 pairs of coal samples that have gloves on are cut, can conveniently observe effectively to cut, when coal sample is put into crushing chamber 8, observation also can be facilitated to carry out fast operating.
In the present embodiment, described casing 1-1 and described sealed platform cover 1-2 Flange joint.Can realize so fast described seal box 1 being opened or closed.
A kind of experimental technique studying underground coal mine CO source mechanism as shown in Figure 4, by utilizing described experimental provision under temperature T condition, coal sample is tested, a corresponding coal sample of temperature T is successively tested multiple identical coal sample, described temperature T successively increases progressively with the increase of experiment number, and wherein the experimental technique of each coal sample comprises the following steps:
Step one, coal sample to be measured is loaded in seal box 1, then sealed platform cover 1-2 sealing is arranged on casing 1-1.
Step 2, in seal box 1, be filled with nitrogen by the first draft tube 4, and by gas outlet 7 by the air emptying in seal box 1; Its effect is by being filled with nitrogen in seal box 1, and then drains the gas in seal box 1, and then makes to be in nitrogen environment in seal box 1, realizes the anoxybiotic of seal box 1.
Step 3, operating personnel stretch in seal box 1 after putting on the gloves 3 be connected on handle hole 2, and use cutting tool to be cut away by the coal body on described coal sample surface; The object of this step is that the oxygen avoiding the coal body on coal sample surface to carry impacts experimental result by being cut away by the coal body on coal sample surface, realizes comprehensive anoxic condition.
Step 4, the coal sample that surperficial coal body cuts away is put into crushing chamber 8, and continue to pass into nitrogen by the second draft tube 6 in crushing chamber 8, the air in crushing chamber 8 is by getting tracheae 5 emptying; Now can stop in seal box 1, being filled with nitrogen by the first draft tube 4.In this step, by passing into nitrogen in crushing chamber 8, can guarantee that crushing chamber 8 is in anoxybiotic environment.
Step 5, startup heating arrangement heat to make coal sample be warming up to temperature T to crushing chamber 8.
Step 6, startup disintegrating machine carry out break process to the coal sample in crushing chamber 8; By carrying out effective break process to coal sample, under anoxic condition, coal body Middle molecule active function groups is made to rupture.
Step 7, collection get the gas that tracheae 5 is discharged, and detect the CO gas concentration C in the described gas of discharging; Concrete, by chromatographic gas componant, and record the concentration C of CO gas.
Adopt above-mentioned steps one to step 7 to after multiple identical coal sample experiment, with temperature T for horizontal ordinate, with CO gas concentration C for ordinate, draw the change curve of CO gas concentration C with temperature T, if described change curve has peak value to occur, then the CO gas comprising and produce by departing from coal body adsorbed state is described in the CO gas of generation; If described change curve occurs straight-line segment or smooth curve section, then the CO gas comprising in the CO gas of generation and produced by chemical bond rupture is described.
In the present embodiment, described coal sample is take from coal sample identical in identical colliery, identical coal seam.In the present embodiment, choose seven coal samples to test, temperature T during first time experiment is 30 DEG C, described temperature T increases progressively 1 DEG C gradually with experiment number, and the temperature T namely during second time experiment is 31 DEG C, and temperature T during third time experiment is 32 DEG C, temperature T during the 4th experiment is 33 DEG C, temperature T during the 5th experiment is 34 DEG C, and temperature T during the 6th experiment is 35 DEG C, and temperature T during the 7th experiment is 36 DEG C.
Because underground coal mine CO gas mainly contains three sources, be depart from coal body adsorbed state and produce respectively; Chemical bond rupture and producing; Coal body oxidation and producing, it is to produce or chemical bond rupture produces by departing from coal body adsorbed state that the present embodiment is only probed at underground coal mine CO gas.The present embodiment judges according to " when CO gas concentration C is that smooth curve or straight line then represent that CO gas is produced by chemical bond rupture with the change curve of temperature T, when CO gas concentration C is that non-smooth curve then represents that CO gas is adsorbed by disengaging coal body to produce with the change curve of temperature T " this principle of experience.
In the present embodiment, the experimental technique of this research underground coal mine CO source mechanism, by carrying out break process at different temperatures to the identical coal sample in same colliery, and then the change of Analysis for CO gas concentration, and then research is for identical coal sample in a certain specific colliery, its CO gas concentration is produced by disengaging coal body adsorbed state, or produced by chemical bond rupture.This experimental technique, easy and simple to handle, effectively can completely cut off the interference of extraneous factor, experimental result accurately and reliably.
The research method of a kind of underground coal mine CO disappearance mechanism as shown in Figure 5, by utilizing described experimental provision under temperature T condition, coal sample is tested, a corresponding coal sample of temperature T is successively tested multiple identical coal sample, described temperature T successively increases progressively with the increase of experiment number, and wherein the experimental technique of each coal sample comprises the following steps:
Step one, coal sample to be measured is loaded in seal box 1, then sealed platform cover 1-2 sealing is arranged on casing 1-1.
Step 2, in seal box 1, be filled with nitrogen by the first draft tube 4, by gas outlet 7 by the air emptying in seal box 1; Its effect is by being filled with nitrogen in seal box 1, and then drains the gas in seal box 1, and then makes to be in nitrogen environment in seal box 1, realizes the anoxybiotic of seal box 1.
Step 3, operating personnel stretch into after putting on the gloves be connected on handle hole 2 in seal box 1, use cutting tool to be cut away by coal sample surface coal body; The object of this step is that the oxygen avoiding the coal body on coal sample surface to carry impacts experimental result by being cut away by the coal body on coal sample surface, realizes comprehensive anoxic condition.
Step 4, the coal sample that surperficial coal body cuts away is put into crushing chamber 8, and start disintegrating machine break process is carried out to the coal sample in crushing chamber 8; By carrying out break process to coal sample, make coal sample fully broken, increasing can the surface area of coal sample, and then improves the contact area of coal body and gas.
Step 5, in crushing chamber 8, pass into nitrogen by the second draft tube 6, by getting the air in tracheae 5 emptying crushing chamber 8; Now, by passing into nitrogen in crushing chamber 8, effectively can discharge gas coal body being evaporated by fragmentation, guaranteeing to be full of by nitrogen in crushing chamber 8, and then avoiding other gas on the impact of experimental result.
Step 6, startup heating arrangement heat to make coal sample be warming up to temperature T to crushing chamber 8;
Step 7, in crushing chamber 8, passed into the mixed gas of nitrogen and CO gas by the second draft tube 6; By under described temperature T condition, pass into the mixed gas of nitrogen and CO gas, thus test at a certain temperature coal body to the adsorptive power of CO gas.
Step 8, collection get the gas that tracheae 5 is discharged, and detect the CO gas concentration C in the described gas of discharging; Concrete, by chromatographic gas componant, and record is by the concentration of getting CO gas in gas that tracheae 5 discharges, due in above-mentioned steps seven, the CO gas concentration passed into is known, and then can calculate the concentration of CO gas that the coal sample absorption that is broken walks.
Adopt above-mentioned steps one to step 8 to after multiple coal sample experiment, the ability of coal body CO absorption gas is observed according to the numerical value change of recorded CO gas concentration C, namely the ability of the numerical value change of CO gas concentration C large explanation coal body CO absorption gas is strong, the ability of the numerical value change little explanation coal body CO absorption gas of CO gas concentration C is weak, the numerical value of CO gas concentration C is unchanged then illustrates coal body to CO gas without absorption, thus judges underground coal mine CO disappearance whether because coal body disappears to CO gas.
In the present embodiment, described coal sample is take from coal sample identical in identical colliery, identical coal seam.In the present embodiment, choose seven coal samples to test, temperature T during first time experiment is 30 DEG C, described temperature T increases progressively 1 DEG C gradually with experiment number, and the temperature T namely during second time experiment is 31 DEG C, and temperature T during third time experiment is 32 DEG C, temperature T during the 4th experiment is 33 DEG C, temperature T during the 5th experiment is 34 DEG C, and temperature T during the 6th experiment is 35 DEG C, and temperature T during the 7th experiment is 36 DEG C.
In the present embodiment, the experimental technique of this research underground coal mine CO disappearance mechanism, by analyzing the CO gas concentration change of discharge at different temperatures to the identical coal sample in same colliery, and then detect coal body to CO gas sorption ability, and then research is for identical coal sample in a certain specific colliery, whether its CO gas disappears is because the reason of absorption.This experimental technique, easy and simple to handle, effectively can completely cut off the interference of extraneous factor, experimental result accurately and reliably.
The above; it is only preferred embodiment of the present invention; not the present invention is imposed any restrictions, every above embodiment is done according to the technology of the present invention essence any simple modification, change and equivalent structure transformation, all still belong in the protection domain of technical solution of the present invention.
Claims (9)
1. underground coal mine CO source mechanism and disappearance study mechanism experimental provision, it is characterized in that: comprise seal box (1), described seal box (1) is made up of the casing (1-1) of one end open and the sealed platform cover (1-2) for closing described opening, described seal box (1) offers two handle holes (2), described handle hole (2) is sealedly connected with gloves (3), the cutting tool cut away by coal sample surface coal body for having on described gloves (3) for operating personnel is placed with in described seal box (1), disintegrating machine for carrying out break process to the coal sample removing surperficial coal body is installed in described seal box (1), described disintegrating machine is provided with the crushing chamber (8) for holding coal sample, described crushing chamber (8) is provided with for the heating arrangement heated it and then make coal sample heat up, described seal box (1) is provided with the first draft tube (4) for nitrogen being led to seal box (1), for the mixed gas of CO gas and nitrogen or nitrogen being led to second draft tube (6) of described crushing chamber (8), for the gas in described seal box (1) being discharged to the outside gas outlet (7) of seal box (1) and seal box (1) is outside gets tracheae (5) for what detect CO gas concentration for being discharged to by the gas in described crushing chamber (8).
2. underground coal mine CO source mechanism according to claim 1 and disappearance study mechanism experimental provision, it is characterized in that: described disintegrating machine comprises the base (9) be arranged in casing (1-1) and the motor (10) be arranged on described base (9), described crushing chamber (8) is arranged on the casing of described motor (10), the output shaft of described motor (10) stretches into described crushing chamber (8) and is provided with broken blade (11) at the position stretching into described crushing chamber (8), described crushing chamber (8) is provided with crushing chamber gland bonnet (13).
3. underground coal mine CO source mechanism according to claim 2 and disappearance study mechanism experimental provision, it is characterized in that: comprise the temperature sensor for measuring coal sample temperature, described crushing chamber gland bonnet (13) being provided with the jack (14) inserted for described temperature sensor.
4. underground coal mine CO source mechanism according to claim 1 and disappearance study mechanism experimental provision, is characterized in that: described heating arrangement adopts the electrical heating wire (12) be wrapped on described crushing chamber (8) outer wall.
5. underground coal mine CO source mechanism according to claim 4 and disappearance study mechanism experimental provision, it is characterized in that: described electrical heating wire (12) comprises nichrome alloy belt (12-1) and is wrapped in the insulator (12-2) in described nichrome alloy belt (12-1) outside, and described insulator (12-2) is made up of multilayer alkali-free glass fibre.
6. underground coal mine CO source mechanism according to claim 1 and disappearance study mechanism experimental provision, is characterized in that: described casing (1-1) is transparent configuration.
7. underground coal mine CO source mechanism according to claim 1 and disappearance study mechanism experimental provision, is characterized in that: described casing (1-1) and described sealed platform cover (1-2) Flange joint.
8. study the experimental technique of underground coal mine CO source mechanism for one kind, it is characterized in that: by utilizing experimental provision as claimed in claim 1 under temperature T condition, coal sample is tested, a corresponding coal sample of temperature T is successively tested multiple identical coal sample, described temperature T successively increases progressively with the increase of experiment number, and wherein the experimental technique of each coal sample comprises the following steps:
Step one, coal sample to be measured is loaded in seal box (1), then sealed platform cover (1-2) sealing is arranged on casing (1-1);
Step 2, in seal box (1), be filled with nitrogen by the first draft tube (4), and by gas outlet (7) by the air emptying in seal box (1);
Step 3, operating personnel stretch in seal box (1) after putting on the gloves (3) be connected on handle hole (2), and use cutting tool to be cut away by the coal body on described coal sample surface;
Step 4, the coal sample that surperficial coal body cuts away is put into crushing chamber (8), and continue to pass into nitrogen in crushing chamber (8) by the second draft tube (6), the air in crushing chamber (8) is by getting tracheae (5) emptying;
Step 5, startup heating arrangement heat crushing chamber (8) to make coal sample be warming up to temperature T;
Step 6, startup disintegrating machine carry out break process to the coal sample in crushing chamber (8);
Step 7, collection get the gas that tracheae (5) is discharged, and detect the CO gas concentration C in the described gas of discharging;
Adopt above-mentioned steps one to step 7 to after multiple identical coal sample experiment, with temperature T for horizontal ordinate, with CO gas concentration C for ordinate, draw the change curve of CO gas concentration C with temperature T, if described change curve has peak value to occur, then the CO gas comprising and produce by departing from coal body adsorbed state is described in the CO gas of generation; If described change curve occurs straight-line segment or smooth curve section, then the CO gas comprising in the CO gas of generation and produced by chemical bond rupture is described.
9. the research method of a underground coal mine CO disappearance mechanism, it is characterized in that: by utilizing experimental provision as claimed in claim 1 under temperature T condition, coal sample is tested, a corresponding coal sample of temperature T is successively tested multiple identical coal sample, described temperature T successively increases progressively with the increase of experiment number, and wherein the experimental technique of each coal sample comprises the following steps:
Step one, coal sample to be measured is loaded in seal box (1), then sealed platform cover (1-2) sealing is arranged on casing (1-1);
Step 2, in seal box (1), be filled with nitrogen by the first draft tube (4), by gas outlet (7) by the air emptying in seal box (1);
Step 3, operating personnel stretch into after putting on the gloves be connected on handle hole (2) in seal box (1), use cutting tool to be cut away by coal sample surface coal body;
Step 4, the coal sample that surperficial coal body cuts away is put into crushing chamber (8), and start disintegrating machine break process is carried out to the coal sample in crushing chamber (8);
Step 5, in crushing chamber (8), pass into nitrogen by the second draft tube (6), by getting the air in tracheae (5) emptying crushing chamber (8);
Step 6, startup heating arrangement heat crushing chamber (8) to make coal sample be warming up to temperature T;
Step 7, in crushing chamber (8), passed into the mixed gas of nitrogen and CO gas by the second draft tube (6);
Step 8, collection get the gas that tracheae (5) is discharged, and detect the CO gas concentration C in the described gas of discharging;
Adopt above-mentioned steps one to step 8 to after multiple coal sample experiment, the ability of coal body CO absorption gas is observed according to the numerical value change of recorded CO gas concentration C, namely the ability of the numerical value change of CO gas concentration C large explanation coal body CO absorption gas is strong, the ability of the numerical value change little explanation coal body CO absorption gas of CO gas concentration C is weak, the numerical value of CO gas concentration C is unchanged then illustrates coal body to CO gas without absorption, thus judges underground coal mine CO disappearance whether because coal body disappears to CO gas.
Priority Applications (1)
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| CN104880543B (en) | 2016-08-31 |
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