CN108387704A - The decomposition of liquid nitrogen frozen gas hydrates sample and burner and its method - Google Patents
The decomposition of liquid nitrogen frozen gas hydrates sample and burner and its method Download PDFInfo
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- CN108387704A CN108387704A CN201810074858.0A CN201810074858A CN108387704A CN 108387704 A CN108387704 A CN 108387704A CN 201810074858 A CN201810074858 A CN 201810074858A CN 108387704 A CN108387704 A CN 108387704A
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- gas hydrates
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 title claims abstract description 156
- 239000007789 gas Substances 0.000 title claims abstract description 136
- 229910052757 nitrogen Inorganic materials 0.000 title claims abstract description 78
- 150000004677 hydrates Chemical class 0.000 title claims abstract description 68
- 239000007788 liquid Substances 0.000 title claims abstract description 64
- 238000000354 decomposition reaction Methods 0.000 title claims abstract description 35
- 238000000034 method Methods 0.000 title abstract description 12
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 104
- 238000001514 detection method Methods 0.000 claims abstract description 50
- 230000001105 regulatory effect Effects 0.000 claims abstract description 31
- 238000007789 sealing Methods 0.000 claims abstract description 30
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 34
- 239000001301 oxygen Substances 0.000 claims description 34
- 229910052760 oxygen Inorganic materials 0.000 claims description 34
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 31
- NMJORVOYSJLJGU-UHFFFAOYSA-N methane clathrate Chemical compound C.C.C.C.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O NMJORVOYSJLJGU-UHFFFAOYSA-N 0.000 claims description 18
- 238000005070 sampling Methods 0.000 claims description 8
- 238000009835 boiling Methods 0.000 claims description 7
- 238000009841 combustion method Methods 0.000 claims description 6
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 6
- 230000002459 sustained effect Effects 0.000 claims description 3
- 238000009825 accumulation Methods 0.000 claims description 2
- 150000001335 aliphatic alkanes Chemical class 0.000 claims description 2
- 238000007710 freezing Methods 0.000 abstract description 2
- 230000008014 freezing Effects 0.000 abstract description 2
- 238000010494 dissociation reaction Methods 0.000 description 14
- 230000005593 dissociations Effects 0.000 description 14
- 108010066114 cabin-2 Proteins 0.000 description 5
- 230000001276 controlling effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 108010066057 cabin-1 Proteins 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000002178 crystalline material Substances 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 238000005191 phase separation Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/22—Fuels; Explosives
- G01N33/225—Gaseous fuels, e.g. natural gas
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Medicinal Chemistry (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- General Chemical & Material Sciences (AREA)
- Food Science & Technology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The present invention provides decomposition and burner and its method of a kind of liquid nitrogen frozen gas hydrates sample, the decomposition and burner include sample chamber, balance cabin, air-out apparatus, regulating valve and methane detection instrument, the sample chamber is connected to the balance cabin, and the height in the balance cabin is more than the height of the sample chamber；Described air-out apparatus one end is connected to the sample chamber, and outlet nozzle is arranged in the other end of air-out apparatus；The regulating valve is arranged on the air-out apparatus, and below the outlet nozzle；Methane detection instrument one end is stretched into the sample chamber, and is connected to the sample chamber, and sealing device is provided between the methane detection instrument and the sample chamber.The present invention can by be stored in be mixed with liquid nitrogen freezing gas hydrates sample in nitrogen and gas hydrates sample detach, and simple in structure, easy to operate, dependable performance.
Description
Technical field
The present invention relates to the decomposition of liquid nitrogen frozen gas hydrates sample and field of combustion technology, specifically, being related to
A kind of decomposition of liquid nitrogen frozen gas hydrates sample and burner and its method.
Background technology
Gas hydrates are also known as " combustible ice ", are distributed widely in the permafrost of halmeic deposit or land-based area, by day
The crystalline material for the class ice-like that right gas is formed with water under the conditions of high pressure low temperature.Because of its appearance as ice and also meet fire it is i.e. flammable
It burns, so also referred to as " combustible ice ".Its Resource Density is high, and distribution on global is extensive, has high resource value, thus becomes
Oil and gas industry circle studies for a long period of time hot spot.Since gas hydrates are extremely easy in decomposition at normal temperatures and pressures, so laboratory preserves day
Right gas hydrate sample needs to be put in freezen protective in liquid nitrogen (under normal pressure, liquid nitrogen temperature is -196 DEG C).
The purity of gas hydrates sample is an important indicator in research, and the survey of gas hydrates purity
It is fixed, it needs to take out gas hydrates from liquid nitrogen, places to heat up in a container and decompose, heat up to it gas for decomposing and releasing
Body ingredient is collected, for subsequent experimental determination；Or to the gas ignition that releases of decomposition, by burning severe degree Lai
The preliminary purity for judging gas hydrates sample.
Therefore, when the gas hydrates of freezen protective take out in liquid nitrogen, a certain amount of liquid nitrogen can be carried, liquid nitrogen volatilization is released
A large amount of nitrogen is released, these nitrogen can be mixed into the gas of gas hydrate dissociation release, to seriously affect subsequent grind
Study carefully work.
Invention content
In order to overcome above-mentioned technical problem, the freezing gas water for being mixed with liquid nitrogen can will be stored in the present invention provides a kind of
Close the decomposition of liquid nitrogen frozen gas hydrates sample that nitrogen and gas hydrates sample in object sample are detached and
Burner and its method.
To achieve the goals above, the decomposition of liquid nitrogen frozen gas hydrates sample of the present invention and burning dress
It sets, including sample chamber, balance cabin, air-out apparatus, regulating valve and methane detection instrument, the sample chamber connect with the balance cabin
Logical, the height in the balance cabin is more than the height of the sample chamber；Described air-out apparatus one end is connected to the sample chamber, outlet
Outlet nozzle is arranged in the other end of device；The regulating valve is arranged on the air-out apparatus, and below the outlet nozzle；Institute
It states methane detection instrument one end to stretch into the sample chamber, and is connected to the sample chamber, the methane detection instrument and the sample
Sealing device is provided between cabin.
Preferably, sealing cover is set between the methane detection instrument and the sample chamber, and the sealing cover is around the methane
Described sample chamber one end of stretching into of survey meter is arranged for one week.
Preferably, the decomposition of the liquid nitrogen frozen gas hydrates sample and burner further include oxygen detection
Instrument, oxygen detection instrument one end is stretched into the sample chamber, and is connected to the sample chamber, the oxygen detection instrument with it is described
Sealing cover is set between sample chamber, and the sealing cover is arranged for one week around described sample chamber one end of stretching into of the oxygen detection instrument.
Preferably, the oxygen detection instrument and the methane detection instrument are located at the both sides of the air-out apparatus.
Preferably, the decomposition of the liquid nitrogen frozen gas hydrates sample and burner further include gas flow
Meter, the gas flowmeter are arranged on the air-out apparatus, and below the regulating valve.
Preferably, the decomposition of the liquid nitrogen frozen gas hydrates sample and burner, further include communicating pipe, institute
It states balance cabin to be connected to by communicating pipe with the sample chamber, the both ends of the communicating pipe are located at the balance cabin and the sample
The lower end in product cabin.
Preferably, the balance cabin is arranged in parallel with the sample chamber, the balance bilge portion and the sample chamber bottom
In same horizontal line.
Preferably, the decomposition of the liquid nitrogen frozen gas hydrates sample and burner further include pedestal, described
Balance cabin bottom and the sample chamber bottom be fixedly installed respectively and the pedestal on.
The decomposition of liquid nitrogen frozen gas hydrates sample of the present invention and combustion method include the following steps：
Step 1: the gas hydrates sample for being mixed with liquid nitrogen is taken out in liquid nitrogen container, it is placed in sample chamber, and past sample
Product fill water in cabin, at this point, the water surface in sample chamber and balance cabin is maintained at sustained height；
Step 2: covering the sealing cover on methane detection instrument, regulating valve is opened；Under same temperature and pressure, liquid nitrogen
Boiling point is lower than the temperature of gas hydrate dissociation, is mixed with liquid nitrogen subsidiary in the gas hydrates sample of liquid nitrogen and volatilizees first
At nitrogen, it is discharged from outlet nozzle after the water surface of emerging；
Step 3: with temperature rise, gas hydrates sample, which starts to decompose, releases methane gas, methane detector
Detect methane concentration increase；At this point, closing regulating valve, gas hydrates sample is made to decompose the air accumulation of release in sample
The top in cabin, with the increase of release gas, the pressure of sample chamber is consequently increased, and the water in sample chamber enters balance cabin, makes
The water surface that must be balanced in cabin is higher than sample chamber, and pressure is provided for gas discharge；Wait for that gas hydrates sample does not have bubble generation
When, gas hydrates sample decomposes completely；
Step 4: the atmospheric sampling bag vacuumized is connected with outlet nozzle, regulating valve is slowly opened, the gas at the top of sample chamber
Body is collected by outlet nozzle in atmospheric sampling bag.
Preferably, the decomposition of the liquid nitrogen frozen gas hydrates sample and combustion method are further comprising the steps of：
Step 5: flow velocity when passing through outlet nozzle using gas flowmeter detection gas and total flow；
Step 6: having detected whether that oxygen is mixed into using oxygen detection instrument, it is then to be sealed operation；
It is no, then enter in next step；
Step 7: controlling the speed that gas flows out outlet nozzle by regulating valve, lighted, and makes the gas of collection can
It burns under control state.
Technical solution provided by the present application can reach following advantageous effect：
For the present invention due under same temperature and pressure, the boiling point of liquid nitrogen is -196 DEG C, and gas hydrate dissociation
Temperature is -45 DEG C, therefore is mixed with liquid nitrogen subsidiary in the gas hydrates sample of liquid nitrogen and is volatilized into nitrogen first, from outlet nozzle
Discharge.In this way, the technical issues of just solving the gas that nitrogen can be mixed into gas hydrate dissociation release；Reach nitrogen
With the technique effect of the gas phase separation of gas hydrate dissociation release；To ensure the gas hydrate dissociation being collected into
The gas purity of release is higher, is conducive to subsequent research, and by controllable valve (i.e. regulating valve), and the gas of collection can be made can
It burns under control state.
Description of the drawings
Fig. 1 is the structural representation of the decomposition and burner of liquid nitrogen frozen gas hydrates sample of the present invention
Figure.
Specific implementation mode
Below with reference to the accompanying drawings illustrate the embodiment of the present invention.It is retouched in the attached drawing of the present invention or a kind of embodiment
The elements and features stated can be combined with elements and features shown in one or more other drawings or embodiments.It answers
When note that for purposes of clarity, being omitted known to unrelated to the invention, those of ordinary skill in the art in attached drawing and explanation
Component or processing expression and description.
The present invention is described further below in conjunction with the accompanying drawings.
As shown in Figure 1, the decomposition of liquid nitrogen frozen gas hydrates sample of the present invention and burner include sample
Product cabin 1, balance cabin 2, air-out apparatus 3, regulating valve 4 and methane detection instrument 5, the sample chamber is connected to the balance cabin, right
When nitrogen after liquid nitrogen volatilization is detached with the gas that gas hydrate dissociation discharges, need to fill in sample chamber
Water allows for sample chamber 1 and the water surface in balance cabin 2 relative to level in this way since sample chamber 1 is connected with balance cabin 2
The height in face is equal, and under same temperature and pressure, the boiling point of liquid nitrogen is -196 DEG C, and the temperature of gas hydrate dissociation
It is -45 DEG C, so liquid nitrogen subsidiary in sample is volatilized into nitrogen first, the water surface of emerging.Since air-out apparatus 3 includes a rod-shaped knot
Structure 31 and an outlet nozzle 32, wherein one end of rod-like structure 31 is connected to sample chamber 1, the other end and outlet of rod-like structure 31
Mouth 31 connects；Therefore, emerge the water surface nitrogen first from the outlet nozzle of air-out apparatus 31 be discharged.
Wherein, the height in the balance cabin 2 is more than the height of the sample chamber 1, due to being released in collection gas hydrates
When releasing methane gas, a part of water in sample chamber can flow into balance cabin so that the water surface in balance cabin is higher than sample
The water surface in product cabin, that is to say, that the pressure in sample chamber is more than the pressure in balance cabin, thus to subsequent collection natural gas
Hydrate releases methane gas (main component of natural gas is methane) and provides pressure.
The regulating valve 4 is arranged on the air-out apparatus 3, and positioned at 32 lower section of the outlet nozzle；Regulating valve is for adjusting
Save the flow that gas is discharged in decomposition or burning.Described 5 one end of methane detection instrument is stretched into the sample chamber 1, and with it is described
Sample chamber 1 is connected to, and it is to manipulate regulating valve to detect methane for convenience of people that methane detection instrument is arranged herein.The first
It is provided with sealing device between alkane survey meter 5 and the sample chamber 1.Sealing cover mentioned here can make sealing ring, gasket
Or other similar devices that can play sealing function.In the present embodiment, sealing device is sealing cover 6.That is, the methane
Sealing cover 6 is set between survey meter 5 and the sample chamber 1, and the sealing cover stretches into the sample around the methane detection instrument
Cabin one end is arranged for one week.That is, when covering sealing cover 6, without the oxygen in air from methane detection instrument and sample
Gap between product cabin enters in sample chamber.
In this way, with temperature rise, gas hydrates sample, which starts to decompose, releases methane gas, and methane detector can
To be immediately detected methane concentration sharp increase.At this moment, regulating valve 4 is closed, keeps the gas that gas hydrates sample decomposes release poly-
The top for combining in sample chamber 1, with the increase of release gas, the pressure of sample chamber 1 is consequently increased, and the water in sample chamber enters
Balance cabin 2 so that the water surface in balance cabin is higher than sample chamber, and pressure is provided for gas discharge.
Wherein, the decomposition of the liquid nitrogen frozen gas hydrates sample and burner further include oxygen detection instrument 7,
Oxygen detection instrument one end is stretched into the sample chamber, and is connected to the sample chamber 1, the oxygen detection instrument 7 with it is described
Sealing cover 6 is set between sample chamber 1, and the sealing cover is set for one week around described sample chamber one end of stretching into of the oxygen detection instrument
It sets.It is identical as the sealing cover on methane detection instrument, sealing cover herein be also prevent oxygen in air from oxygen detection instrument with
Gap between sample chamber enters in sample chamber.
It should be noted that：Herein setting oxygen detection instrument be in order to gas hydrates discharge methane when,
It has detected whether that oxygen is mixed into, if there is oxygen is mixed into, then has just needed to detect whether sealing cover covers tightly, if mixed without oxygen
Enter, then can carry out it is subsequent light, when also avoiding to be mixed into oxygen in methane, lighting can there is a situation where explode to occur.
Wherein, in the present embodiment, the oxygen detection instrument 7 and the methane detection instrument 5 are located at the outlet dress
The both sides set.In this way, people is facilitated especially to exist the operation of oxygen detection instrument and methane detection instrument to a certain extent
When oxygen detection instrument and methane detection instrument work at the same time.
Wherein, the decomposition of liquid nitrogen frozen gas hydrates sample and burner further include gas flowmeter 8, the gas
Flowmeter body 8 is arranged on the air-out apparatus 3, and positioned at 4 lower section of the regulating valve.Setting gas flowmeter 8 can herein
Flow velocity to be measured to the gas volume that gas hydrate dissociation discharges, and when showing gas by outlet nozzle 32 and total
Flow.In this way, also people is facilitated to the operation of regulating valve, that is, to be beaten on the basis of flow velocity and flow number to a certain extent
Open and close are closed or are tuned up, turn down.
Wherein, in the present embodiment, the balance cabin is connected to the sample chamber by a connecting pipe 9, by
It is a simple communication apparatus in communicating pipe, therefore, it is more simple to allow for apparatus structure in this way, facilitates people to device
Operation.The both ends of communicating pipe 9 described herein are located at the lower end in the balance cabin and the sample chamber, so that balance
Cabin is connected to sample chamber in bottom, ensures that the gas of gas hydrate dissociation release is all collected in sample chamber in this way
It is interior, without being diffused into balance cabin.
Certainly, in the embodiment other than the present invention, balance cabin can also be made directly to be connected to sample chamber, or will be even
The both ends of siphunculus are integrated with sample chamber and the setting of balance cabin respectively.
Wherein, in the present embodiment, the balance cabin is arranged in parallel with the sample chamber, the balance bilge portion with it is described
Sample chamber bottom is located in same horizontal line, in this way, when gas hydrates discharge methane, it is more convenient to make to put down
Weigh cabin and sample chamber formation pressure difference, to which methane gas is pressed into air-out apparatus, and is discharged from outlet nozzle.
In the present embodiment, the decomposition of liquid nitrogen frozen gas hydrates sample and burner further include pedestal 10, institute
State balance cabin bottom and the sample chamber bottom be fixedly installed respectively and the pedestal on.In this way, being in order to sample
Product cabin and balance cabin are fixed.
The decomposition of liquid nitrogen frozen gas hydrates sample of the present invention and combustion method include the following steps：
Step 1: the gas hydrates sample for being mixed with liquid nitrogen is taken out in liquid nitrogen container, it is placed in sample chamber, and past sample
Product fill water in cabin, at this point, the water surface in sample chamber and balance cabin is maintained at sustained height；
Step 2: covering the sealing cover on methane detection instrument, regulating valve is opened；Under same temperature and pressure, liquid nitrogen
Boiling point is -196 DEG C, and the temperature of gas hydrate dissociation is -45 DEG C, i.e., the boiling point of liquid nitrogen is than gas hydrate dissociation
Temperature is low, is mixed with liquid nitrogen subsidiary in the gas hydrates sample of liquid nitrogen and is volatilized into nitrogen first, from outlet after the water surface of emerging
Mouth is discharged；
Step 3: with temperature rise, gas hydrates sample, which starts to decompose, releases methane gas, methane detector
Methane concentration sharp increase can be immediately detected；At this point, closing regulating valve, keep the gas that gas hydrates sample decomposes release poly-
The top for combining in sample chamber, with the increase of release gas, the pressure of sample chamber is consequently increased, and the water in sample chamber enters flat
Weighing apparatus cabin so that the water surface in balance cabin is higher than sample chamber, and pressure is provided for gas discharge；Wait for that gas hydrates sample does not have gas
When bubble generates, gas hydrates sample decomposes completely；
Step 4: the atmospheric sampling bag vacuumized is connected with outlet nozzle, regulating valve is slowly opened, the gas at the top of sample chamber
Body is collected by outlet nozzle in atmospheric sampling bag.
Preferably, the decomposition of the liquid nitrogen frozen gas hydrates sample and combustion method are further comprising the steps of：
Step 5: flow velocity when passing through outlet nozzle using gas flowmeter detection gas and total flow；
Step 6: having detected whether that oxygen is mixed into using oxygen detection instrument, it is then to be sealed operation；
It is no, then enter in next step；
Step 7: controlling the speed that gas flows out outlet nozzle by regulating valve, lighted, and makes the gas of collection can
It burns under control state.
The present invention the decomposition of liquid nitrogen frozen gas hydrates sample and the operation principle of burner be：
Gas hydrates sample is taken out in liquid nitrogen container, is placed in sample chamber, water is filled, at this moment sample chamber and balance
The water surface in cabin is contour.Sealing cover is covered, regulating valve is opened.Under same temperature and pressure, the boiling point of liquid nitrogen is -196 DEG C, and
The temperature of gas hydrate dissociation is -45 DEG C, so liquid nitrogen subsidiary in sample is volatilized into nitrogen first, after the water surface of emerging from
Outlet nozzle is discharged.Then as temperature rise, gas hydrates sample, which starts to decompose, releases methane gas, methane detector
Methane concentration sharp increase can be immediately detected.At this moment, regulating valve is closed, keeps the gas that gas hydrates sample decomposes release poly-
The top for combining in sample chamber, with the increase of release gas, the pressure of sample chamber is consequently increased, and the water in sample chamber passes through company
Siphunculus enters balance cabin so that the water surface in balance cabin is higher than sample chamber, and pressure is provided for gas discharge.Wait for gas hydrates
When sample does not have bubble generation, you can think that it is decomposed completely.At this moment the atmospheric sampling bag and outlet that can will be vacuumized
Mouth connects, and slowly opens regulating valve, and the gas at the top of sample chamber is collected into atmospheric sampling bag by outlet nozzle and is ground for subsequent
Study carefully use, gas flowmeter can show flow velocity and total flow when gas passes through outlet nozzle.Gas is lighted if necessary, can be led to
The speed for overregulating valve control gas outflow outlet nozzle, can burn in air.Gone out due to gas hydrate dissociation
Gas componant is mainly methane, there is the possibility of explosion if when being mixed into oxygen and lighting.For this purpose, being visited equipped with oxygen on sealing cover
Instrument is surveyed, can detect whether that oxygen is mixed into, to ensure the safety of operation.
Although the present invention and its advantage has been described in detail it should be appreciated that without departing from by the attached claims
Defined by can carry out various changes, replacement and transformation in the case of the spirit and scope of the present invention.Moreover, the model of the application
Enclose the specific embodiment for being not limited only to process, equipment, means, method and steps described in specification.In the art is common
Technical staff executes and corresponding reality described herein from the disclosure it will be readily understood that can be used according to the present invention
Apply the essentially identical function of example or obtain the result essentially identical with it, existing and process to be developed in future, equipment,
Means, method or step.Therefore, the attached claims are intended to include such process, equipment, hand in the range of them
Section, method or step.
Claims (10)
1. decomposition and the burner of a kind of liquid nitrogen frozen gas hydrates sample, which is characterized in that including sample chamber, balance
Cabin, air-out apparatus, regulating valve and methane detection instrument, the sample chamber are connected to the balance cabin, the height in the balance cabin
More than the height of the sample chamber；Described air-out apparatus one end is connected to the sample chamber, and the other end of air-out apparatus is provided
Gas nozzle；The regulating valve is arranged on the air-out apparatus, and below the outlet nozzle；It stretches methane detection instrument one end
Enter in the sample chamber, and be connected to the sample chamber, sealing dress is provided between the methane detection instrument and the sample chamber
It sets.
2. decomposition and the burner of liquid nitrogen frozen gas hydrates sample according to claim 1, which is characterized in that
Sealing cover is set between the methane detection instrument and the sample chamber, and the sealing cover is described around stretching into for the methane detection instrument
Sample chamber one end is arranged for one week.
3. decomposition and the burner of liquid nitrogen frozen gas hydrates sample according to claim 1, which is characterized in that
Further include oxygen detection instrument, oxygen detection instrument one end is stretched into the sample chamber, and is connected to the sample chamber, the oxygen
Sealing cover is set between gas survey meter and the sample chamber, and the sealing cover stretches into the sample chamber around the oxygen detection instrument
One end is arranged for one week.
4. decomposition and the burner of liquid nitrogen frozen gas hydrates sample according to claim 3, which is characterized in that
The oxygen detection instrument and the methane detection instrument are located at the both sides of the air-out apparatus.
5. decomposition and the burner of liquid nitrogen frozen gas hydrates sample according to claim 1, which is characterized in that
Further include gas flowmeter, the gas flowmeter is arranged on the air-out apparatus, and below the regulating valve.
6. decomposition and the burner of liquid nitrogen frozen gas hydrates sample according to claim 1, which is characterized in that
It further include communicating pipe, the balance cabin is connected to the sample chamber by communicating pipe, and the both ends of the communicating pipe are located at institute
State the lower end in balance cabin and the sample chamber.
7. the decomposition of the liquid nitrogen frozen gas hydrates sample and burning dress according to any one of claims 1 to 6
It sets, which is characterized in that the balance cabin is arranged in parallel with the sample chamber, the balance bilge portion and sample chamber bottom position
In in same horizontal line.
8. decomposition and the burner of liquid nitrogen frozen gas hydrates sample according to claim 7, which is characterized in that
Further include pedestal, it is described balance cabin bottom and the sample chamber bottom be fixedly installed respectively and the pedestal on.
9. decomposition and the combustion method of a kind of liquid nitrogen frozen gas hydrates sample, which is characterized in that include the following steps：
1) the gas hydrates sample for being mixed with liquid nitrogen is taken out in liquid nitrogen container, is placed in sample chamber, and noted into sample chamber
Full water, at this point, the water surface in sample chamber and balance cabin is maintained at sustained height；
2) sealing cover on methane detection instrument is covered, regulating valve is opened；Under same temperature and pressure, the boiling point of liquid nitrogen is than natural
The temperature that gas hydrate decomposes is low, is mixed with liquid nitrogen subsidiary in the gas hydrates sample of liquid nitrogen and is volatilized into nitrogen first, emits
It is discharged from outlet nozzle after going out the water surface；
3) with temperature rise, gas hydrates sample, which starts to decompose, releases methane gas, and methane detector detects first
Alkane concentration increases；At this point, closing regulating valve, gas hydrates sample is made to decompose the air accumulation of release in the top of sample chamber
End, with the increase of release gas, the pressure of sample chamber is consequently increased, and the water in sample chamber enters balance cabin so that balance
The water surface in cabin is higher than sample chamber, and pressure is provided for gas discharge；When gas hydrates sample does not have bubble generation, naturally
Gas hydrate sample decomposes completely；
4) the atmospheric sampling bag vacuumized is connected with outlet nozzle, slowly opens regulating valve, the gas at the top of sample chamber is by going out
Gas nozzle is collected into atmospheric sampling bag.
10. the decomposition of liquid nitrogen frozen gas hydrates sample according to claim 9 and combustion method, feature exist
In further comprising the steps of after step 4)：
5) flow velocity when passing through outlet nozzle using gas flowmeter detection gas and total flow；
6) it has detected whether that oxygen is mixed into using oxygen detection instrument, has been, be then sealed operation；
It is no, then enter in next step；
7) speed that gas flows out outlet nozzle is controlled by regulating valve, is lighted, and make the gas of collection under controllable state
Burning.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810074858.0A CN108387704B (en) | 2018-01-25 | 2018-01-25 | Decomposing and burning device and method for liquid nitrogen frozen natural gas hydrate sample |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810074858.0A CN108387704B (en) | 2018-01-25 | 2018-01-25 | Decomposing and burning device and method for liquid nitrogen frozen natural gas hydrate sample |
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| CN108387704A true CN108387704A (en) | 2018-08-10 |
| CN108387704B CN108387704B (en) | 2024-03-19 |
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| CN201810074858.0A Active CN108387704B (en) | 2018-01-25 | 2018-01-25 | Decomposing and burning device and method for liquid nitrogen frozen natural gas hydrate sample |
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| CN103217318A (en) * | 2013-04-26 | 2013-07-24 | 中国地质调查局油气资源调查中心 | Vacuum gas collection system for core gas of natural gas hydrate drilling field |
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