CN206731075U - A kind of lanthanum chloride hydrate gas-liquid cycle control loop system - Google Patents
A kind of lanthanum chloride hydrate gas-liquid cycle control loop system Download PDFInfo
- Publication number
- CN206731075U CN206731075U CN201620405553.XU CN201620405553U CN206731075U CN 206731075 U CN206731075 U CN 206731075U CN 201620405553 U CN201620405553 U CN 201620405553U CN 206731075 U CN206731075 U CN 206731075U
- Authority
- CN
- China
- Prior art keywords
- gas
- liquid
- reaction kettle
- pressure
- control loop
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 239000007788 liquid Substances 0.000 title claims abstract description 126
- NUXZAAJDCYMILL-UHFFFAOYSA-K trichlorolanthanum;hydrate Chemical compound O.Cl[La](Cl)Cl NUXZAAJDCYMILL-UHFFFAOYSA-K 0.000 title abstract 3
- 238000000034 method Methods 0.000 claims abstract description 27
- 230000008569 process Effects 0.000 claims abstract description 22
- 238000006243 chemical reaction Methods 0.000 claims description 106
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 72
- 230000015572 biosynthetic process Effects 0.000 claims description 65
- 238000003786 synthesis reaction Methods 0.000 claims description 63
- 230000000087 stabilizing effect Effects 0.000 claims description 43
- 230000001105 regulatory effect Effects 0.000 claims description 37
- 239000000872 buffer Substances 0.000 claims description 36
- 238000003756 stirring Methods 0.000 claims description 34
- 239000012071 phase Substances 0.000 claims description 28
- 239000007791 liquid phase Substances 0.000 claims description 20
- 230000005587 bubbling Effects 0.000 claims description 15
- 239000007921 spray Substances 0.000 claims description 14
- 229910045601 alloy Inorganic materials 0.000 claims description 10
- 239000000956 alloy Substances 0.000 claims description 10
- 239000012530 fluid Substances 0.000 claims description 8
- 238000005086 pumping Methods 0.000 claims description 8
- 229910000934 Monel 400 Inorganic materials 0.000 claims description 5
- OANFWJQPUHQWDL-UHFFFAOYSA-N copper iron manganese nickel Chemical compound [Mn].[Fe].[Ni].[Cu] OANFWJQPUHQWDL-UHFFFAOYSA-N 0.000 claims description 5
- 239000010935 stainless steel Substances 0.000 claims description 5
- 229910001220 stainless steel Inorganic materials 0.000 claims description 5
- 238000009736 wetting Methods 0.000 claims 1
- 150000004677 hydrates Chemical class 0.000 abstract 2
- 239000007789 gas Substances 0.000 description 117
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Natural products C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 38
- 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 description 34
- 238000005507 spraying Methods 0.000 description 13
- 238000002474 experimental method Methods 0.000 description 12
- 239000007924 injection Substances 0.000 description 12
- 238000002347 injection Methods 0.000 description 12
- 230000000694 effects Effects 0.000 description 11
- 239000003345 natural gas Substances 0.000 description 11
- 238000005260 corrosion Methods 0.000 description 10
- 230000007797 corrosion Effects 0.000 description 9
- 238000013461 design Methods 0.000 description 9
- 238000005259 measurement Methods 0.000 description 8
- 230000007246 mechanism Effects 0.000 description 8
- 239000000243 solution Substances 0.000 description 8
- 230000008859 change Effects 0.000 description 7
- 239000000463 material Substances 0.000 description 6
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 6
- 238000005057 refrigeration Methods 0.000 description 5
- 239000000523 sample Substances 0.000 description 5
- 238000003860 storage Methods 0.000 description 5
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 4
- 230000033228 biological regulation Effects 0.000 description 4
- 239000007853 buffer solution Substances 0.000 description 4
- 230000001276 controlling effect Effects 0.000 description 4
- 238000011160 research Methods 0.000 description 4
- 239000013535 sea water Substances 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 3
- -1 Natural gas hydrates Chemical class 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 229910052731 fluorine Inorganic materials 0.000 description 3
- 239000011737 fluorine Substances 0.000 description 3
- 239000010410 layer Substances 0.000 description 3
- 230000033001 locomotion Effects 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
- 229910052697 platinum Inorganic materials 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 239000003381 stabilizer Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 238000012546 transfer Methods 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 241000197194 Bulla Species 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 208000002352 blister Diseases 0.000 description 2
- 238000009530 blood pressure measurement Methods 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 239000013043 chemical agent Substances 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000011049 filling Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- 150000002894 organic compounds Chemical class 0.000 description 2
- 239000006104 solid solution Substances 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- 230000002194 synthesizing effect Effects 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- 235000006693 Cassia laevigata Nutrition 0.000 description 1
- 101100117236 Drosophila melanogaster speck gene Proteins 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 239000004696 Poly ether ether ketone Substances 0.000 description 1
- 241000522641 Senna Species 0.000 description 1
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- JUPQTSLXMOCDHR-UHFFFAOYSA-N benzene-1,4-diol;bis(4-fluorophenyl)methanone Chemical compound OC1=CC=C(O)C=C1.C1=CC(F)=CC=C1C(=O)C1=CC=C(F)C=C1 JUPQTSLXMOCDHR-UHFFFAOYSA-N 0.000 description 1
- 238000009529 body temperature measurement Methods 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000012611 container material Substances 0.000 description 1
- 239000000110 cooling liquid Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000013480 data collection Methods 0.000 description 1
- 238000010612 desalination reaction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 239000005431 greenhouse gas Substances 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 230000002706 hydrostatic effect Effects 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 238000013173 literature analysis Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000008239 natural water Substances 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 229920002530 polyetherether ketone Polymers 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000037452 priming Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000012429 reaction media Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 229940124513 senna glycoside Drugs 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The utility model provides a kind of lanthanum chloride hydrate gas-liquid cycle control loop system, including：Air inflow control loop and liquid inlet volume control loop；The air inflow control loop is used for the air inflow for adjusting supply air line；The liquid inlet volume control loop is used for the liquid inlet volume for adjusting liquid feeding pipeline.Lanthanum chloride hydrate gas-liquid cycle control loop system provided by the utility model, can speed up the combined coefficient of gas hydrates, so as to promote the process of industrialization of gas hydrates.
Description
Technical Field
The utility model relates to a natural gas hydrate exploitation and utilize technical field, especially relate to a hydrate synthesis gas-liquid circulation control loop system.
Background
Natural gas hydrates, consisting of small hydrocarbons (mainly CH)4) A cage-like crystalline substance formed by van der waals' force with water molecules under low temperature and high pressure conditions. Theoretically, 1m3Can release 164m of natural gas hydrate3Normal state CH4And 0.8m3The water of (2). The amount of methane in the global natural gas hydrate is about (1.8-2.1) x1016m3The fuel is equivalent to more than twice of fossil fuels such as coal, petroleum, natural gas and the like found in the world.
The natural gas hydrate has the characteristics of wide distribution, large reserve, high energy density, green and clean performance and the like, so the natural gas hydrate is considered as a fourth-generation novel alternative energy with great potential. Since the eighteenth century, hydrate research has been carried out successively and certain results have been obtained in a plurality of countries, and natural gas hydrate sample samples have been found and successfully obtained in permafrost zones in the south of the Shenfox sea area and the Qilian mountain south of the north of the south sea.
The hydrate technology has wide application prospect in the fields of energy gas storage and transportation, mixed gas separation, greenhouse gas capture, seawater desalination, cold accumulation and the like, the realization of the rapid synthesis of the hydrate is the premise of the commercial application of the hydrate, and the rapid synthesis of the hydrate at present has the following problems in several aspects: (1) slow generation speed, and (2) low gas storage density. Therefore, the realization of the rapid synthesis of the natural gas hydrate is the key of the large-scale commercial application of the natural gas hydrate. Therefore, the research of the natural gas hydrate rapid synthesis technology under the industrialized condition by combining the basic research of the hydrate rapid synthesis is a necessary choice for promoting the advance of the hydrate technology.
SUMMERY OF THE UTILITY MODEL
To the technical problem that above-mentioned exists, the utility model provides a hydrate synthesis gas-liquid circulation control loop system realizes the high-efficient quick formation of natural gas hydrate, promotes natural gas hydrate's industrialization process.
A hydrate synthesis gas-liquid circulation control loop system comprises: an air inflow control loop and a liquid inlet control loop;
the air inlet quantity control loop is used for adjusting the air inlet quantity of the air supply pipeline; the air inflow control loop comprises a pipeline for pumping unreacted gas in the reaction kettle out from a gas outlet b at the upper part of the reaction kettle through a gas circulating pump and circularly pumping the unreacted gas into a gas inlet a at the bottom of the reaction kettle;
the liquid inlet amount control loop is used for adjusting the liquid inlet amount of the liquid supply pipeline; wherein,
the liquid inlet quantity control loop is formed by sequentially connecting the following components: the liquid circulation pump comprises a liquid circulation pump outlet, a seventh regulating valve, a seventh temperature indicator, a seventeenth pressure indicator, a first liquid flow meter, a ninth regulating valve, a sixth temperature indicator, a sixteenth pressure indicator and a liquid circulation pump inlet.
Further, the hydrate synthesis gas-liquid circulation control loop system comprises a gas supply pipeline and a gas tank, wherein the gas supply pipeline is used for conveying gas in the gas tank to the reaction kettle; the pipeline is formed by sequentially connecting a sixth pressure indicator, a first stop valve, a first regulating valve, a first pressure indicator, a first temperature indicator, a fourth stop valve, a second pressure indicator, a second temperature indicator, a gas circulating pump, a second regulating valve, a fourth pressure indicator, a fourth temperature indicator, a third regulating valve, a second gas flowmeter and a sixth stop valve with an outlet of a gas cylinder through a pipeline, and finally communicating the outlet of the gas cylinder with a gas inlet a at the bottom of a reaction kettle;
the liquid supply pipeline is used for conveying water in the water tank into the reaction kettle; the outlet of the liquid supply pipeline is communicated with the liquid phase inlet c of the reaction kettle through a pipeline, and a plunger pump is arranged on the communicating pipeline.
Further, the hydrate synthesis gas-liquid circulation control loop system also comprises a stirring device and a data acquisition control system;
the stirring device is characterized in that a stirrer is arranged in the reaction kettle, a stirring and crushing paddle of the stirrer adopts a propulsion paddle form, and a crushing cone is arranged below the paddle;
the data acquisition control system comprises a computer, a resistivity measuring point C, a pressure measuring point P, a temperature measuring point T, a liquid level measuring point L, a single-phase and multi-phase fluid flow measuring point F and a motor parameter measuring point M, wherein the resistivity measuring point C, the pressure measuring point P, the temperature measuring point T and the liquid level measuring point L are connected with the computer.
Further, the hydrate synthesis gas-liquid circulation control loop system also comprises a spraying device;
this spray set includes: the top of the reaction kettle is provided with a sprayer which is communicated with a liquid phase inlet c of the reaction kettle through a pipeline, and a liquid circulating pump is arranged on the communicating pipeline.
Further, the hydrate synthesis gas-liquid circulation control loop system also comprises a bubbling device;
the bubbling device comprises a bubbler arranged at the bottom of the reaction kettle.
Further, in the hydrate synthesis gas-liquid circulation control loop system, the gas inflow control loop is provided with a gas protection circulation loop for protecting the gas circulation pump, and the gas protection circulation loop is formed by sequentially connecting the following components: the gas circulation pump comprises a gas circulation pump outlet, a second regulating valve, a fourth pressure indicator, a fourth temperature indicator, a fourth regulating valve, a first gas flowmeter, a second pressure indicator, a second temperature indicator and a gas circulation pump inlet.
Further, the hydrate synthesis gas-liquid circulation control loop system comprises a pressure stabilizing pipeline for keeping the pressure inside the reaction kettle constant or under a required pressure condition; the pressure stabilizing pipe is composed of a liquid phase pipeline and a gas phase pipeline 2;
the liquid phase pipeline is formed by sequentially connecting a water tank, a plunger pump, a liquid phase inlet d at the bottom of the pressure stabilizing buffer tank, a liquid phase outlet h and a second drain valve through pipelines;
the gas phase pipeline is formed by sequentially connecting an outlet of a gas cylinder, a gas phase inlet f at the upper part of the pressure stabilizing buffer tank, a gas phase outlet g of the pressure stabilizing buffer tank and a gas inlet a at the bottom of the reaction kettle through pipelines.
Further, according to the hydrate synthesis gas-liquid circulation control loop system, the pressure stabilizing buffer tank is also connected with a vacuum pump.
Furthermore, according to the hydrate synthesis gas-liquid circulation control loop system, the pressure stabilizing buffer tank is provided with the third temperature indicator, the third pressure indicator, the first liquid level indicator and the second safety valve, the periphery of the pressure stabilizing buffer tank is provided with the jacket heat exchanger, the inside of the heat exchanger is provided with the diversion trench, and the temperature in the reaction kettle is adjusted and controlled by the pressure stabilizing buffer tank refrigerating unit through the first water inlet valve and the first water outlet valve.
Further, in the hydrate synthesis gas-liquid circulation control loop system, a fifth pressure indicator, a fifth temperature indicator, a second liquid level indicator and a resistivity indicator are mounted on the reaction kettle;
the periphery of the reaction kettle is provided with a jacket heat exchanger, a diversion trench is arranged in the heat exchanger, and the temperature in the reaction kettle is adjusted and controlled by a reaction kettle refrigerating unit through a second water inlet valve and a water outlet valve.
The periphery of the reaction kettle is provided with a jacket heat exchanger, a diversion trench is arranged in the heat exchanger, and the temperature in the reaction kettle is adjusted and controlled by a reaction kettle refrigerating unit through a second water inlet valve and a water outlet valve.
The utility model provides a hydrate synthesis gas-liquid circulation control loop system can accelerate natural gas hydrate's synthetic efficiency to natural gas hydrate's industrialization process has been promoted.
Drawings
FIG. 1 is a schematic structural diagram of a hydrate synthesis gas-liquid circulation control loop system of the present invention;
fig. 2 the utility model discloses data acquisition control system schematic structure.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention are clearly and completely described below, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
As shown in fig. 1 and 2, the utility model discloses the quick synthesis that the main module is the natural gas hydrate big sample, the utility model discloses hydrate synthesis system adopts the mode that the tympanic bulla, sprays and stir and combine together, and this system is by reation kettle, air feed and gas circulation system, supplies liquid and liquid circulation system, mechanical strengthening effect system, steady voltage buffer system, and valve and pipeline annex etc. constitute.
The reaction kettle mainly provides a hydrate synthesis and storage space, the temperature of water and a reaction medium in the reaction kettle is controlled by a refrigerating unit, three hydrate rapid synthesis devices are additionally arranged in the reaction kettle, a stirrer is erected in the middle of a kettle body, a sprayer is erected on the top of the kettle body, a bubbler is installed at the bottom of the kettle body, a fifth pressure indicator P-105, a fifth temperature indicator T-105, a second liquid level indicator (a differential pressure type liquid level meter L-102) and a resistivity indicator C-101 are installed on the kettle body, a jacket heat exchanger is installed on the periphery of the reaction kettle, a diversion trench is arranged in the heat exchanger, and the temperature in the reaction kettle is adjusted and controlled by the refrigerating unit through a second water inlet valve V-401 and a second water outlet valve V-402.
The gas injection and gas circulation system comprises a gas cylinder, a sixth pressure indicator P-106 for detecting the pressure of the gas cylinder, a first stop valve V-101, a first pressure indicator P-101, a first temperature indicator T-101 and a fourth stop valve V-104, wherein a main gas inlet pipeline is provided with the second pressure indicator P-102, the second temperature indicator T-102, a gas circulating pump, a second regulating valve CV-105, the fourth pressure indicator P-104, the fourth temperature indicator T-104, a third regulating valve CV-108, a second gas flowmeter F-102 and the sixth stop valve V-110, an exhaust valve V-111 and a fifth stop valve V-112 are arranged on a gas outlet pipeline, and a fourth regulating valve CV-109 and a first gas flowmeter F-101 are arranged on a bypass regulating pipeline.
The liquid injection and circulation system comprises a water tank, a seventh stop valve V-201, a plunger pump, a fifth regulating valve CV-204, an eighth stop valve V-205, a sixth regulating valve CV-206, a sixth temperature indicator T-201, a sixteenth pressure indicator P-201, a liquid circulating pump, a seventh regulating valve CV-208, a seventh temperature indicator T-202, a seventeenth pressure indicator P-202, a second liquid flowmeter F-202, an eighth regulating valve CV-209, a first liquid flowmeter F-201 and a flow regulating valve (a ninth regulating valve CV-207) which are arranged on a liquid injection pipeline.
The pressure stabilizing buffer system comprises a main body equipment pressure stabilizing buffer tank, wherein the upper space is filled with gas, one side of the pressure stabilizing buffer tank is connected with a gas cylinder through a third stop valve V-103, the other side of the pressure stabilizing buffer tank is connected with an air inlet pipeline through a sixth stop valve V-106, and the pressure stabilizing buffer system is connected with a vacuum pump through an eighteenth stop valve V-301 and a seventh pressure indicator P-301 to realize the vacuum pumping operation of the whole loop; the lower part of the pressure stabilizing buffer tank is filled with water, one side of the pressure stabilizing buffer tank is connected with the water tank and the liquid inlet pipeline through an eleventh stop valve V-202 and an eighteenth pressure indicator P-203, the two sides of the pressure stabilizing buffer tank are connected with a second drain valve V-203, a third temperature indicator T-103, a third pressure indicator P-103, a first liquid level indicator (a differential pressure type liquid level meter L-101) and a second safety valve V-107 are arranged on the pressure stabilizing buffer tank, a jacket heat exchanger is arranged on the periphery of the buffer tank, a diversion trench is arranged in the heat exchanger, and the temperature in the reaction kettle is adjusted and controlled through a first water inlet valve V-403 and a first water outlet valve V-404 by a refrigerator set.
The liquid supply and liquid circulation system and the gas supply and gas circulation system respectively provide liquid water and natural gas circulation driving rams in the hydrate generation process; the mechanical strengthening acts on the experimental research of the rapid synthesis of the hydrate; the pressure stabilizing buffer system has the function of regulating and controlling the system pressure; the gas cylinder is used for providing gas required by the experiment; the function of the vacuum pump is to evacuate the air in the pipeline before the pipeline is charged, so as to avoid mixing of the natural gas and the oxygen. The plunger pump acts on the water injection and water supplement operation of the system; the valve and the pipe fitting control the flow of the experimental fluid of the loop; parameters such as pressure, temperature and flow of the whole experiment loop are collected and stored through the data collection control system.
As shown in fig. 1 and fig. 2, the utility model provides a hydrate synthesis gas-liquid circulation control loop system, include: an air inflow control loop and a liquid inlet control loop;
the air inlet quantity control loop is used for adjusting the air inlet quantity of the air supply pipeline; the gas inflow control loop comprises a gas bypass adjusting circulation loop for pumping unreacted gas in the reaction kettle 115 out from a gas outlet b at the upper part of the reaction kettle through a gas circulating pump 111 and circularly pumping the unreacted gas into a gas inlet a at the bottom part of the reaction kettle 115;
the liquid inlet amount control loop is used for adjusting the liquid inlet amount of the liquid supply pipeline; wherein,
the liquid inlet quantity control loop is formed by sequentially connecting the following components: the outlet of the liquid circulating pump 114, a seventh regulating valve CV-208, a seventh temperature indicator T-202, a seventeenth pressure indicator P-202, a first liquid flow meter F-201, a ninth regulating valve CV-207, a sixth temperature indicator T-201, a sixteenth pressure indicator P-201 and the inlet of the liquid circulating pump 114.
Preferably, the hydrate synthesis gas-liquid circulation control loop system is as described above, and the gas supply pipeline is used for conveying the gas in the gas cylinder 118 to the reaction kettle 115; the pipeline is communicated with a gas inlet a at the bottom of the reaction kettle 115 through a pipeline from an outlet of a gas cylinder 118; the pipeline is formed by sequentially connecting the following components: the gas cylinder 118, a sixth pressure indicator P-106, a first stop valve V-101, a first regulating valve CV-102, a first pressure indicator P-101, a first temperature indicator T-101, a fourth stop valve V-104, a second pressure indicator P-102, a second temperature indicator T-102, a gas circulating pump 111, a second regulating valve CV-105, a fourth pressure indicator P-104, a fourth temperature indicator T-104, a third regulating valve CV-108, a second gas flow meter F-102, a sixth stop valve V-110 and a gas inlet a at the bottom of the reaction kettle 115.
The liquid supply pipeline is used for conveying water in the water tank 113 to the reaction kettle 115; the liquid supply line is connected to the reactor liquid phase inlet c via a line from the outlet of the water tank 113, and the plunger pump 112 is provided on the connecting line.
Preferably, the hydrate synthesis gas-liquid circulation control loop system further comprises a stirring device and a data acquisition control system;
the stirring device is characterized in that a stirrer 119 is arranged in the reaction kettle 115, a stirring and crushing paddle of the stirrer 119 is in a propulsion paddle form, and a crushing cone is arranged below the paddle;
the data acquisition control system comprises a computer, a resistivity measuring point C, a pressure measuring point P, a temperature measuring point T, a liquid level measuring point L, a single-phase and multi-phase fluid flow measuring point F and a motor parameter measuring point M, wherein the resistivity measuring point C, the pressure measuring point P, the temperature measuring point T and the liquid level measuring point L are connected with the computer.
Preferably, the hydrate synthesis gas-liquid circulation control loop system further comprises a spraying device;
this spray set includes: a sprayer 1151 is arranged at the top of the reaction kettle 115, the sprayer 1151 is communicated with the reaction kettle liquid phase inlet c through a pipeline, and a liquid circulating pump 114 is arranged on the communicating pipeline.
Preferably, the hydrate synthesis gas-liquid circulation control loop system further comprises a bubbling device;
the bubbling device includes a bubbler 122 disposed at the bottom of the reaction tank 115.
Preferably, in the hydrate synthesis gas-liquid circulation control loop system, the gas inflow control loop is provided with a gas protection circulation loop for protecting the gas circulation pump, and the gas protection circulation loop is formed by sequentially connecting the following components: a gas circulation pump 111 outlet, a second regulating valve CV-105, a fourth pressure indicator P-104, a fourth temperature indicator T-104, a fourth regulating valve CV-109, a first gas flow meter F-101, a second pressure indicator P-102, a second temperature indicator T-102, and a gas circulation pump 111 inlet.
Preferably, the hydrate synthesis gas-liquid circulation control loop system as described above comprises a pressure stabilizing pipeline for keeping the pressure inside the reaction kettle 115 at a constant or desired pressure condition; the pressure stabilizing pipe is composed of a liquid phase pipeline and a gas phase pipeline 2;
wherein, the liquid phase pipeline is formed by sequentially connecting a water tank 113, a plunger pump 112, a liquid phase inlet d at the bottom of the pressure stabilizing buffer tank 117, a liquid phase outlet h and a second drain valve V-203 through pipelines;
the gas phase pipeline is formed by sequentially connecting an outlet of a gas cylinder 118, a gas phase inlet f at the upper part of the pressure stabilizing buffer tank 117, a gas phase outlet g of the pressure stabilizing buffer tank 117 and a gas inlet a at the bottom of the reaction kettle 115 through pipelines.
Preferably, in the hydrate synthesis gas-liquid circulation control loop system, the pressure stabilizing buffer tank 117 is further connected with a vacuum pump 116.
Preferably, in the hydrate synthesis gas-liquid circulation control loop system, the pressure stabilizing buffer tank 117 is provided with a third temperature indicator T-103, a third pressure indicator P-103, a first liquid level indicator L-101 and a second safety valve V-107, the periphery of the pressure stabilizing buffer tank 117 is provided with a jacket heat exchanger, a diversion trench is arranged inside the jacket heat exchanger, and the temperature in the reaction kettle is adjusted and controlled by the pressure stabilizing buffer tank refrigerating unit 120 through a first water inlet valve V-403 and a first water outlet valve V-404.
Preferably, in the hydrate synthesis gas-liquid circulation control loop system, a fifth pressure indicator P-105, a fifth temperature indicator T-105, a second liquid level indicator L-102 and a resistivity indicator C-101 are arranged on the reaction kettle 115;
the periphery of the reaction kettle 115 is provided with a jacket heat exchanger, a diversion trench is arranged in the heat exchanger, and the temperature in the reaction kettle 115 is adjusted and controlled by a reaction kettle refrigerating unit 123 through a second water inlet valve V-401 and a water outlet valve V-402.
Based on above, the utility model discloses when synthesizing synthetic natural gas hydrate, not only let in through gaseous bottom from reation kettle and react synthetic natural gas hydrate rather than inside liquid, in order to accelerate synthetic natural gas hydrate's efficiency moreover, the utility model discloses a mode of stirring, tympanic bulla and spraying increases the area of contact of gas and liquid to natural gas hydrate's synthesis accelerates.
Furthermore, a second liquid level indicator L-102, a resistivity indicator C-101, a fifth temperature indicator T-105 and a fifth pressure indicator P-105 are arranged on the reaction kettle 115 to measure the real-time state of the reaction kettle.
Further, a reaction kettle refrigerating unit 123 is arranged on the reaction kettle 115, two ends of the reaction kettle refrigerating unit 123 are respectively connected with the periphery of the reaction kettle 115, and a second water inlet valve V-401 and a second water outlet valve V-402 are respectively arranged on a pipeline between the reaction kettle refrigerating unit 123 and the reaction kettle 115.
Further, a first drain valve V-210 is arranged on a connecting pipeline of a liquid phase inlet c of the reaction kettle; an emptying valve V-111 is arranged on a connecting pipeline of a gas phase outlet b of the reaction kettle.
The data acquisition control system comprises: a resistivity measuring point C, a pressure measuring point P, a temperature measuring point T, a liquid level measuring point L, a single-phase and multi-phase fluid flow measuring point F and a motor parameter measuring point M;
the resistivity measuring point C is used for analyzing and judging the synthetic effect of the marine natural gas hydrate by measuring the resistivity of the natural gas hydrate in the reaction kettle through the resistivity, comparing and referring according to an acquired resistivity curve, and displaying the generation process of the hydrate in real time through the curve;
the pressure measurement point P is used for measuring the pressure in the pressure-stabilizing buffer tank, the inside of the reaction kettle and on each pipeline, monitoring the pressure of the whole experiment loop system in real time according to the measurement result, ensuring that the natural gas hydrate is synthesized rapidly in large quantity, and judging the generation condition and the phase equilibrium state of the natural gas hydrate in the reaction kettle according to the pressure drop change condition and the pressure change curve in the reaction kettle;
the temperature measuring point T is used for measuring the temperature in the pressure stabilizing buffer tank, the reaction kettle and each pipeline, and the mass rapid synthesis of the natural gas hydrate is ensured through the measuring result; and judging the generation condition and the phase equilibrium state of the natural gas hydrate in the reaction kettle according to the temperature change condition and the temperature change curve in the reaction kettle;
the liquid level measuring point L is used for measuring the height states of liquid in the pressure stabilizing buffer tank and the reaction kettle, and the measuring result is used as a judgment index of the water injection amount in the reaction kettle and the amount of hydrate after the hydrate is generated in the experimental process;
the single-phase and multi-phase fluid flow measuring point F is used for measuring the real-time flow of fluid (gas, liquid and mixed phase) passing through a corresponding pipeline, judging and calculating the consumption of natural gas and water according to the measuring result and researching the gas storage capacity of the natural gas hydrate;
the motor parameter measuring point M is used for measuring the stirring parameters (such as rotating speed), crushing parameters (such as crushing rotating speed, crushing torque, propelling pressure, crushing depth and crushing pressure) and parameters (such as spraying angle, spraying speed and liquid drop size) of a sprayer and parameters (such as bubbling speed and bubbling size) of the bubbler of a stirrer in the reaction kettle, the data measured by the measuring result can be used as the basis for controlling the stirring parameters, the crushing parameters, the sprayer parameters and the bubbler parameters of the crushing stirrer, so that experimenters can adopt a mode of combining the bubbling method, the spraying method and the stirring method, and can also utilize one or two of the methods to strengthen the rapid generation of the natural gas hydrate, or the influence of a certain parameter on the rapid synthesis rate of the natural gas hydrate in large quantity is researched by controlling the stirring parameter, the crushing parameter, the sprayer parameter and the bubbler parameter.
1. Hydrate sample synthesis
1.1 preparation of hydrate Synthesis
(1) And (3) vacuumizing operation: and (3) enabling the V-101 to be in a closed state, simultaneously closing the emptying valve V-111, the seventh stop valve V-201 and the second drain valve V-203, enabling other valves to be in an open state, starting the vacuum pump 116 to vacuumize, and when a certain vacuum degree (measured by a seventh pressure indicator P-301) is reached, closing the eighteenth stop valve V-301 and closing the vacuum pump 116. And opening the first stop valve V-101, filling gas into the experimental loop, closing the first stop valve V-101 after the filling is finished, and starting the vacuum pump 116 again to carry out vacuum pumping operation, wherein the operation is repeated for a plurality of times to reduce the air volume in the loop.
(2) Water level calibration operation: closing the upper end socket of the reaction kettle, adjusting the valve to enable the second drain valve V-203, the sixth stop valve V-106, the eighteenth stop valve V-301, the first drain valve V-210 and the fifth stop valve V-112 to be in a closed state, enabling the seventh stop valve V-201, the eleventh stop valve V-202, the fifth adjusting valve CV-204, the eighth stop valve V-205 and the drain valve V-111 to be in an open state, starting the plunger pump 112 to drain the pressure stabilizing buffer tank 17 and the reaction kettle 115 and fill water, establishing a standard water level, and closing the fourth stop valve V-104, the eleventh stop valve V-202 and the eighth stop valve V-205;
(3) gas injection operation: and opening the first stop valve V-101, and controlling the methane gas injection pressure (preventing potential safety hazard caused by high-voltage direct current of the methane gas) by the first regulating valve CV-102 to ensure that the loop system is filled with natural gas with certain pressure.
(4) Water level adjustment operation: adjusting the fifth stop valve V-112 and the first drain valve V-210, pressing the water level of the reaction kettle to a proper water level through natural gas, and closing the first drain valve V-210; and adjusting the third stop valve V-103 and the second drain valve V-203, lowering the water level in the pressure stabilizing buffer tank 117 to a proper water level through natural gas, and closing the second drain valve V-203.
(5) Water replenishing and pressurizing operation: and when the loop pressure does not rise any more, closing the first stop valve V-101, opening the seventh stop valve V-201 and the eleventh stop valve V-202, starting the plunger pump 112, supplementing water to the pressure stabilizing buffer tank 117 for pressurization, and when the pressure stabilizing buffer tank 117 reaches the experimental pressure (measured by the third pressure indicator P-103), closing the plunger pump 112, and closing the seventh stop valve V-201 and the eleventh stop valve V-202.
1.2 Experimental procedures for hydrate Synthesis
(1) Refrigeration operation: and starting the reaction kettle refrigerating unit 123 for water bath refrigeration, and setting the temperature to be constant as required by the hydrate generation experiment.
(2) Gas circulation operation: and starting the gas circulating pump 111, and adjusting the second adjusting valve CV-105 and the third adjusting valve CV-108 or the fourth adjusting valve CV-109, namely, adjusting through a gas main circuit and a bypass, so that the natural gas flow passing through the reaction kettle 115 meets the experimental requirements, injecting gas from the kettle bottom of the reaction kettle 115, entering the reaction kettle 115 in a bubbling manner, and flowing out from the upper end cover for circulation.
(3) Stirring operation: and starting the stirrer 119, and setting the rotating speed to be suitable for generating the hydrate and not damaging the experimental requirement of the aggregation of the hydrate (the stepless speed regulation range is 100-400 r/min).
(4) Spraying operation: and starting the liquid circulating pump 114, adjusting a sixth adjusting valve CV-206, a ninth adjusting valve CV-207 or an eighth adjusting valve CV-209, and enabling the liquid inlet amount passing through the upper end cover nozzle to meet the experimental requirements through liquid main path circulation and bypass circulation.
(5) Voltage stabilization operation: and opening the seventh stop valve V-201, the eleventh stop valve V-202 and the sixth stop valve V-106, starting the plunger pump 112 to fill water into the pressure stabilizing buffer tank 117 to pressurize the loop system, or opening the sixth stop valve V-106 and the second drain valve V-203 to drain water to reduce the pressure of the system, wherein the pressure of the loop system is measured by the second pressure indicator P-102, the fourth pressure indicator P-104 and the fifth pressure indicator P-105, and the pressure of the system is kept stable through pressurization and depressurization operation.
(6) Flow measurement: the second gas flowmeter F-102 and the third gas flowmeter F-103 respectively measure the accumulated flow of methane gas at the inlet and the outlet of the cycle, and calculate the gas consumption of hydrate generation by the accumulated metering value (material balance calculation method).
(7) And (3) resistance measurement operation: 4 point resistance measuring points C-101 are arranged around the reaction kettle 115, and the synthetic effect of the marine natural gas hydrate is analyzed and judged through the measured resistivity; and comparing and referring according to the acquired resistivity curve, and displaying the generation process of the hydrate in real time through the curve.
(8) Temperature and pressure measurement operation: and a fifth temperature indicator T-105 and a fifth pressure indicator P-105 are arranged around the reaction kettle 115, and the synthesis effect of the marine natural gas hydrate is analyzed and judged through a measured temperature-pressure curve.
(9) And (5) finishing the operation: when the sample synthesized by the marine natural gas hydrate meets the experiment requirement, the gas circulating pump 111 (supercharger) is closed, the sixth stop valve V-110 and the fifth stop valve V-112 are closed, the liquid circulating pump 114 is closed, the ninth stop valve V-212 and the tenth stop valve V-211 are closed, and the marine natural gas hydrate rapid synthesis experiment is finished.
The stirring parameters (such as rotating speed), crushing parameters (such as crushing rotating speed, crushing torque, propelling pressure, crushing depth and crushing pressure), spray thrower parameters (such as spray angle, spray rate and liquid drop size) and bubbler parameters (such as bubbling rate) of the reaction kettle stirrer are controllable;
the synthetic stirring and crushing paddle of the synthetic reaction kettle for the natural gas hydrate selects a propeller blade form, and a crushing cone is arranged below the propeller blade to simulate the form of a submarine mining vehicle so as to achieve the purpose of crushing the hydrate; a stirrer in the natural gas hydrate reaction kettle adopts a variable frequency motor and an electrodeless speed reducer to realize the rotation of a stirring and crushing paddle, and a two-stage hydraulic oil cylinder realizes the up-and-down movement of the stirring paddle;
the utility model is provided with a second liquid level indicator (a differential pressure type liquid level meter L-102) on the reaction kettle,
the utility model discloses be equipped with 4 point resistance measurement stations C-101 around reation kettle, come the analysis and judge ocean natural gas hydrate's synthetic effect through the resistivity of measurement, compare and refer to according to the resistivity curve of gathering, show the formation process of hydrate through the curve in real time; temperature and pressure measuring elements are arranged around the reaction kettle, and the synthesis effect of the marine natural gas hydrate is analyzed and judged through a measured temperature and pressure curve.
The gas consumption in the process of generating the natural gas hydrate is measured by the second gas flowmeter F-102 and the third gas flowmeter F-103, the water consumption in the process of generating the hydrate is measured by the second liquid level meter L-102 of the reaction kettle, and the gas storage density of the natural gas hydrate can be comprehensively calculated according to the measured flow data.
The refrigerating unit which provides the refrigerating effect for the reaction kettle and the pressure stabilizing buffer tank in the experimental process has two functions of refrigeration and heating;
the reaction kettle is a core device of a hydrate synthesis system, is a vertical three-class pressure vessel, and mainly comprises a flat cover, a device flange, a water outlet flange, a cylinder body, a seal head, a water inlet, an air inlet, a bottom plate, a stirring mechanism, a spraying mechanism, a bubbling mechanism, a measuring element and the like, wherein the temperature in the reaction kettle is controlled by a refrigerating unit, point resistance measuring sensors are arranged around the kettle body, and a uniform foaming device, a spraying device and a stirring device are arranged in the kettle bottom to strengthen the gas-water mixing process.
The reactor parameters were as follows:
designing pressure: 16MPa
Design temperature: -15 to 40 DEG C
The size of the kettle body is as follows: phi 600X 1000(mm)
Total volume of the cavity: 500L
Height-diameter ratio: 1.5 to 2.5
The highest working pressure: 12MPa
Working temperature: 0 ℃ to 30 DEG C
Pressure of hydrostatic test: 20MPa
Working medium: water and natural gas, chemical agents, etc
The main material is as follows: 0Cr18Ni10Ti or alloy steel and stainless steel 316 material anticorrosive coating
Designing the service life: for 30 years
The utility model discloses the high-pressure synthesis cauldron chooses fluorine to glue "O" shape circle for use, and low and convenient to use of manufacturing cost, installation power are low, resistant chemical medium and carbon dioxide gas, anti extrusion, anti gas explosion. With the development of materials, the static sealing pressure can reach 70 MPa. At present, the sealing is adopted in the ship heavy industry high-pressure cabin, so that the sealing performance requirement of the system can be completely met.
Because the surface of the inner cavity of the high-pressure synthesis kettle can contact with the medium in the kettle (seawater, methane, chemical agents and the like which are corrosive), the high-pressure synthesis kettle needs to be subjected to anti-corrosion treatment so as to ensure the service performance and the service life of the high-pressure synthesis kettle.
The inner cavity surface of the synthesis kettle, the inner surface of the end socket, holes contacting with the medium and other wet parts are hot-melted with the Monel 400 alloy anticorrosive layer by adopting a special process. The Monel 400 alloy has a structure of a high-strength single-phase solid solution, and is a corrosion-resistant alloy with the largest dosage, the widest application and the excellent comprehensive performance. The alloy has excellent corrosion resistance in hydrofluoric acid and fluorine gas medium and also has excellent corrosion resistance to hot concentrated alkali liquor. And also resists corrosion by neutral solutions, water, seawater, the atmosphere, organic compounds, and the like. An important characteristic of the alloy is that stress corrosion cracking is not generated generally and the cutting performance is good.
Design of pressure stabilizing buffer tank
In order to ensure the stable pressure of the system in the loop operation process, the loop system is provided with 1 voltage stabilizer. Regulator design parameters may be determined based on the associated loop volume. In order to reduce the size of the voltage stabilizer, 3 devices with the same volume are selected to be processed and used in parallel.
The design parameters of the voltage stabilizer are as follows:
the inner cavity surface of the pressure stabilizing buffer tank, the inner surface of the end enclosure, holes in contact with the medium and other wet parts are hot-melted with the Monel 400 alloy anticorrosive layer by adopting a special process. The Monel 400 alloy has a structure of a high-strength single-phase solid solution, and is a corrosion-resistant alloy with the largest dosage, the widest application and the excellent comprehensive performance. The alloy has excellent corrosion resistance in hydrofluoric acid and fluorine gas medium and also has excellent corrosion resistance to hot concentrated alkali liquor. And also resists corrosion by neutral solutions, water, seawater, the atmosphere, organic compounds, and the like.
Stirring mechanism
Designing parameters:
the stirring speed for synthesizing the hydrate is as follows: stepless speed regulation of 100-400 r/min;
stirring power: 7.5Kw, variable frequency motor;
according to relevant literature analysis and reference of the influence of the stirring speed on the generation of the hydrate, the system has the pressure of 12MPa, the working temperature of-5-15 ℃ and the stirring speed of 100-400 r/min, so that an ideal effect can be achieved, and the matching of the temperature, the pressure and the rotation speed can be verified in practical application.
The hydrate synthesis stirring and crushing paddle selects a propulsion paddle form, and is suitable for the processes of mixing, heat transfer or reaction of medium and high viscosity liquid and the like. The surface of the stirrer is sprayed with a Teflon (polytetrafluoroethylene) anticorrosive layer, the hardness of the surface layer is low, the anticorrosive requirement can be met, and the damage to the hydrate in the forming process is reduced as much as possible.
The hydrate stirring operation is mainly completed by a stirring mechanism. The stirring mechanism comprises hydraulic control and motor control dual control, the motor control realizes the rotary crushing motion of the stirring paddle, the hydraulic control realizes the up-and-down progressive motion of the stirring paddle, and the rotary stirring crushing effect in the hydrate space is realized.
Spraying mechanism
Technical parameters of the spraying method and working pressure: 16 MPa; working temperature: -10 to 60 ℃; spray discharge capacity: 10L/min; the German SPECK high-pressure plunger pump is selected to meet the experimental requirements.
The spraying method is that the water solution is atomized into a synthesis kettle filled with gas through a nozzle, so that a liquid phase is dispersed into a gas phase, and the generation of hydrate is facilitated; the experimental system is characterized in that a high-pressure synthesis kettle is filled with 12MPa high-pressure natural gas, aqueous solution passes through a pressure-stabilizing overflow valve from the kettle bottom and is pressurized by a spray pump, the hydrate is synthesized by a synthetic water circulating spray method, and the total amount of synthetic water is unchanged; the spraying method can greatly increase the gas/water contact area, thereby realizing the generation rate of hydrate synthesis.
Bubbling mechanism
Consists of the following components: the device comprises a flow regulating valve, an air compressor, a gas booster, a flowmeter, a one-way valve, a spray pump, an overflow valve, a pipe valve and the like.
Technical parameters of the bubble method are as follows:
working pressure: 16 MPa; working temperature: -10 to 60 ℃; gas discharge capacity: 50L/min.
(1) The gas injection porous net plate component consists of a pore plate, a filter screen, a pressure plate and a gas injection spray head;
(2) the device adopts a perforated plate, countless holes with small aperture (less than phi 2mm) are distributed on the perforated plate, and a stainless steel filter screen is clamped to prevent sand grains from leaking into a gas injection interlayer, and methane gas is circularly injected from bottom to top, so that the hydrate is quickly synthesized;
(3) the gas injection shower nozzle adopts nonmetal PEEK material, and is thermal-insulated effectual, and the surface has antiseized to link to adhere the effect, prevents that factors such as gas injection subcooling from generating hydrate and blockking up the shower nozzle.
Standard equipment model selection
(1) Air compressor model selection
According to the experimental requirement, the air compressor in the system has the function of providing power for the gas booster pump, and the pressure grade of the air compressor is required to be wide, so that the booster pump is easy to select and match. Therefore, a piston air compressor is selected.
The specific parameters are as follows:
TABLE 1 DW-3.0/0.7 technical parameter Table
(2) Booster pump
The double-cylinder gas booster pump is adopted, continuous pressurized gas can be generated, and the flow of the gas at the outlet is stable
TABLE 2 STT40 technical parameter Table
(3) Vacuum pump
Methane and wet carbon dioxide can be flushed into the hydrate exploitation high-pressure synthesis kettle in the experimental process, and the medium is flammable, explosive and corrosive, so that a diaphragm vacuum pump is selected. According to the above discussion, the system selects a novel combined molecular pump of a turbo molecular pump group 2X-70, can generate a vacuum degree of 6X 10-7bar, and has the characteristics of simple and reliable use, and is used by users all over the world
TABLE 3 technical parameter Table
(4) Plunger pump
The plunger pump not only has good suction performance, but also has good self-suction performance. Thus, for most reciprocating pumps, priming of the pump is generally not required prior to start-up. The machine has high efficiency and saves energy. According to the experimental technical parameters and experimental requirements, the pump types and parameters selected at this time are as follows:
TABLE 4 high-pressure plunger pump model selection results
(5) Refrigerating unit
The utility model discloses a reaction temperature is controlled to the mode that reation kettle immerges water bath control by temperature change groove, and the basin dress cooling liquid, then the liquid level submergence cauldron body. The refrigeration effect is realized by the circulation tank, and the circulation tank has two functions of refrigeration and circulation, and the temperature can be manually set to control the temperature of the water bath. The reaction kettle is placed in a hydrate low-temperature water bath box, and the temperature of the reaction kettle is controlled by setting the temperature of the hydrate low-temperature water bath box. The temperature of the hydrate low-temperature water bath box is controlled on a computer through a numerical control system, and all measurement signals can be collected by a data acquisition card and displayed and stored on the computer.
The design parameters of the hydrate low-temperature water bath tank are as follows:
[ temp. -controlling range ] 15 to 60 deg.C
[ temperature control accuracy ] 0.2 deg.C
[ Heat transfer Power ] 2000W
Stainless steel type 304 or 316 (inner container material)
[ inner container volume ] can hold 5 reation kettle of 500ml simultaneously
(6) Temperature sensor
According to the requirements of an experimental system, a PT100 platinum thermal resistor is selected as a temperature measuring element, and PT100 is a platinum thermal resistor, and the resistance value of the platinum thermal resistor changes along with the change of temperature. A post-PT value of 100 means that it has a resistance of 100 ohms at 0c and a resistance of about 138.5 ohms at 100 c. Its resistance value will increase at a nearly uniform rate as the temperature rises. But the relationship between them is not a simple proportional relationship, but rather should be approximated to a parabola
(7) Pressure sensor
By considering the comprehensive performance, the price and the like, the pressure sensor used in the experimental system is a Senama DG series pressure sensor. The DG series ultrahigh pressure transmitter Senna is self-researched and developed and obtains the product of the utility model patent, the detection pressure reaches 700MPa, and the precision can reach 0.25 level. The device has stable and reliable performance and convenient installation, is suitable for process measurement in occasions such as oil drilling, rock stratum analysis, and simulation test of the earth-core environment, and has the functions of overpressure resistance, overcurrent, reverse protection and the like
(8) Electromagnetic flowmeter
The measuring principle of the intelligent electromagnetic flowmeter is Faraday's law of electromagnetic induction, and the main components of the sensor are as follows: measuring tube, electrode, excitation coil, iron core and yoke casing. It is mainly used for measuring the volume flow of conductive liquid and slurry in a closed pipeline. Including strongly corrosive liquids such as acids, bases, salts, and the like. And selecting an intelligent electromagnetic flowmeter provided by the Zhongcheng instrument as the metering flowmeter used by the experiment system according to the requirements of the experiment system such as technical parameters and the like.
(9) Resistance measuring element
The resistivity measuring instrument is applied to the continuous monitoring of the resistivity values in solutions such as thermal power, chemical fertilizers, metallurgy, environmental protection, pharmacy, biochemistry, food, tap water and the like. The resistivity measuring instrument simplifies the function on the basis of ensuring the performance, thereby having particularly strong price advantage. The environmental adaptability, clear display, simple operation and excellent test performance enable the test device to have high cost performance. In order to detect the generation condition of the hydrate, the experimental system selects the resistance measuring instrument as an auxiliary measuring tool and reacts the medium change condition in the synthesis kettle according to the measured resistance. The resistance device used at this time comprises an electrode probe, a high-frequency alternating current constant current source and a current and voltage acquisition board card.
(10) Liquid level meter
The differential pressure type liquid level meter is used for measuring the liquid level of a transmitter by using a differential pressure meter or a differential pressure transmitter, and is the most widely used liquid level measuring instrument at present. The differential pressure type liquid level meter works by utilizing the principle that when the liquid level in the container is changed, the static pressure generated by a liquid column is correspondingly changed,
(11) valve gate
In order to meet the requirement of the operation of the experimental device, the experimental device is provided with 25 corresponding valves on a loop, in order to realize the high-efficiency operation of the experiment, the control modes of the valves are all electrically controlled,
(12) pipe design
The loop system pipeline design result is as follows: the loop pipe section adopts 0Cr18Ni10Ti, and the pipe specification is phi 10 multiplied by 1.
Principle of arrangement
The whole device should be arranged within a given area;
the equipment with vibration is arranged on the ground as much as possible, and the equipment cannot be arranged on the vibration equipment on the ground, so that a special fixing support is required to be designed;
the water tank is arranged higher than the pump inlet so as to meet the requirement of cavitation allowance of the plunger pump inlet;
the equipment and the pipeline arrangement consider the convenience of future maintenance, replacement, assembly and disassembly as much as possible;
the pipeline arrangement meets the experimental requirements, and valves with smaller resistance are adopted as far as possible, so that elbows are reduced as far as possible, and the flow resistance is reduced;
the pipeline arrangement needs to meet the stress requirement, the pipeline arrangement is tidy and attractive, the small-caliber pipeline is connected in a welding mode, the large-caliber pipeline is connected through a clamping sleeve type flange, the number of large-caliber welding seams is reduced as much as possible, and the welding seams are prevented from remaining in the range of the support as much as possible so as to be convenient to operate. The equipment, the pipe fittings and the valves need to be installed in consideration of convenient maintenance and cannot be mutually hindered;
the temperature measuring point and the pressure measuring point are arranged at the parts with stable working medium flowing state and good convection heat transfer. The pressure measuring point is provided with at least a straight pipe section with the diameter 10 times of that of the pipeline as a stable section.
Valve gate
Principle of model selection
The selection of the valve follows the following considerations:
the valve body material of the valve is stainless steel;
the regulating valves are all normally open type electric regulating valves;
the relief valve has a recoil pressure that is not affected by the back pressure of the discharge port.
Principle of arrangement
The valves should be placed in a location that is easily accessible, convenient to operate, and easy to maintain.
The valve is preferably arranged at a position where the displacement of the pipeline is small;
when the rising stem type valve with the horizontally arranged valve is opened, the valve stem cannot hinder the passing;
when the valves are arranged adjacently, the clear distance between the hand wheels is not less than 100 mm;
the valve rod direction of the valve on the horizontal pipeline is vertically upward.
Thermal insulation design of process system
According to the regulations of GB 50264-1997 design code for industrial equipment and pipeline heat insulation engineering, in order to reduce the heat exchange between the experimental equipment, the pipeline and accessories thereof and the surrounding environment, certain coating measures are required to be taken on the outer surface of the experimental equipment.
The heating of the environment to experimental equipment and pipelines in the experiment is reduced, and the requirement of the experiment on the temperature regulation of the pipelines and the flowing medium is better met.
The devices or pipes which should not be insulated mainly comprise:
equipment and piping that require heat dissipation or must be exposed;
equipment and pipe flanges requiring timely discovery of leaks;
frequent monitoring or measurement is required to prevent damage to the site;
and equipment or pipelines which do not need heat preservation such as exhaust, emptying and the like in the process system.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (7)
1. A hydrate synthesis gas-liquid circulation control loop system is characterized by comprising: an air inflow control loop and a liquid inlet control loop;
the air inlet quantity control loop is used for adjusting the air inlet quantity of the air supply pipeline; the gas inflow control loop comprises a pipeline for pumping unreacted gas in the reaction kettle (115) from a gas outlet b at the upper part of the reaction kettle through a gas circulating pump (111) and circularly pumping the unreacted gas into a gas inlet a at the bottom of the reaction kettle (115);
the liquid inlet amount control loop is used for adjusting the liquid inlet amount of the liquid supply pipeline; wherein,
the liquid inlet quantity control loop is formed by sequentially connecting the following components: the outlet of the liquid circulating pump (114), a seventh regulating valve (CV-208), a seventh temperature indicator (T-202), a seventeenth pressure indicator (P-202), a first liquid flow meter (F-201), a ninth regulating valve (CV-207), a sixth temperature indicator (T-201), a sixteenth pressure indicator (P-201) and the inlet of the liquid circulating pump (114);
the gas supply pipeline is used for conveying gas in the gas cylinder (118) to the reaction kettle (115); the pipeline is formed by sequentially connecting a sixth pressure indicator (P-106), a first stop valve (V-101), a first regulating valve (CV-102), a first pressure indicator (P-101), a first temperature indicator (T-101), a fourth stop valve (V-104), a second pressure indicator (P-102), a second temperature indicator (T-102), a gas circulating pump (111), a second regulating valve (CV-105), a fourth pressure indicator (P-104), a fourth temperature indicator (T-104), a third regulating valve (CV-108), a second gas flow meter (F-102) and a sixth stop valve (V-110) with an outlet of a gas bottle (118) through a pipeline, and finally communicating with a gas inlet a at the bottom of a reaction kettle (115);
the liquid supply pipeline is used for conveying water in the water tank (113) into the reaction kettle (115); the liquid supply pipeline is communicated with the liquid phase inlet c of the reaction kettle through a pipeline by the outlet of a water tank (113), and a plunger pump (112) is arranged on the communicating pipeline;
the stirring device and the data acquisition control system are also included;
the stirring device is characterized in that a stirrer (119) is arranged in the reaction kettle (115), a stirring and crushing paddle of the stirrer (119) is in a pushing paddle form, and a crushing cone is arranged below the paddle;
the data acquisition control system comprises a computer, a resistivity measuring point C, a pressure measuring point P, a temperature measuring point T, a liquid level measuring point L, a single-phase fluid flow measuring point F and a multiphase fluid flow measuring point M, wherein the resistivity measuring point C, the pressure measuring point P, the temperature measuring point T and the liquid level measuring point L are connected with the computer;
also comprises a bubbling device;
the bubbling device comprises a bubbler (122) arranged at the bottom of the reaction kettle (115);
the inner cavity surface of the reaction kettle (115), the inner surface of the end socket and the wetting part of the hole contacted with the medium are hot-melted with the Monel 400 alloy anticorrosive layer by adopting a special process;
the bubbling device comprises a flow regulating valve, an air compressor, a gas supercharger, a flowmeter, a one-way valve, a spray pump, an overflow valve and a pipe valve; the bubbling device adopts a perforated plate, holes with the aperture less than phi 2mm are distributed on the perforated plate, and a layer of stainless steel filter screen is clamped on the perforated plate.
2. The hydrate synthesis gas-liquid circulation control loop system according to claim 1, further comprising a spray device;
this spray set includes: a sprayer (1151) is arranged at the top of the reaction kettle (115), the sprayer (1151) is communicated with the liquid phase inlet c of the reaction kettle through a pipeline, and a liquid circulating pump (114) is arranged on the communicating pipeline.
3. The hydrate synthesis gas-liquid circulation control loop system according to claim 1, wherein the gas inlet control loop is provided with a gas protection circulation loop for protecting a gas circulation pump, and the gas protection circulation loop is formed by sequentially connecting the following components: the gas circulation system comprises a gas circulation pump (111) outlet, a second regulating valve (CV-105), a fourth pressure indicator (P-104), a fourth temperature indicator (T-104), a fourth regulating valve (CV-109), a first gas flow meter (F-101), a second pressure indicator (P-102), a second temperature indicator (T-102) and a gas circulation pump (111) inlet.
4. The hydrate synthesis gas liquid circulation control loop system according to claim 1, characterized by comprising a pressure stabilizing line for keeping the pressure inside the reaction vessel (115) constant or at a desired pressure condition; the pressure stabilizing pipe is composed of a liquid phase pipeline and a gas phase pipeline 2; wherein the liquid phase pipeline is formed by sequentially connecting a water tank (113), a plunger pump (112), a liquid phase inlet d at the bottom of the pressure stabilizing buffer tank (117), a liquid phase outlet h and a second drain valve (V-203) through pipelines;
the gas phase pipeline is formed by sequentially connecting an outlet of a gas cylinder (118), a gas phase inlet f at the upper part of the pressure stabilizing buffer tank (117), a gas phase outlet g of the pressure stabilizing buffer tank (117) and a gas inlet a at the bottom of the reaction kettle (115) through pipelines.
5. The hydrate synthesis gas-liquid circulation control loop system according to claim 4, wherein a vacuum pump (116) is further connected to the surge tank (117).
6. The hydrate synthesis gas-liquid circulation control loop system according to claim 4, wherein a third temperature indicator (T-103), a third pressure indicator (P-103), a first liquid level indicator (L-101) and a second safety valve (V-107) are arranged on the surge tank (117), a jacket heat exchanger is arranged on the periphery of the surge tank (117), a diversion trench is arranged inside the jacket heat exchanger, and the temperature in the reaction kettle is adjusted and controlled by the surge tank refrigerating unit (120) through a first water inlet valve (V-403) and a first water outlet valve (V-404).
7. The hydrate synthesis gas liquid circulation control loop system according to claim 1, wherein a fifth pressure indicator (P-105), a fifth temperature indicator (T-105), a second level indicator (L-102) and a resistivity indicator (C-101) are installed on the reaction kettle (115); the periphery of the reaction kettle (115) is provided with a jacket heat exchanger, a diversion trench is arranged in the heat exchanger, and the temperature in the reaction kettle (115) is adjusted and controlled by a reaction kettle refrigerating unit (123) through a second water inlet valve (V-401) and a water outlet valve (V-402).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620405553.XU CN206731075U (en) | 2016-05-06 | 2016-05-06 | A kind of lanthanum chloride hydrate gas-liquid cycle control loop system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620405553.XU CN206731075U (en) | 2016-05-06 | 2016-05-06 | A kind of lanthanum chloride hydrate gas-liquid cycle control loop system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206731075U true CN206731075U (en) | 2017-12-12 |
Family
ID=60554285
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620405553.XU Expired - Fee Related CN206731075U (en) | 2016-05-06 | 2016-05-06 | A kind of lanthanum chloride hydrate gas-liquid cycle control loop system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206731075U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110237780A (en) * | 2019-05-23 | 2019-09-17 | 兰州理工大学 | A kind of environmentally friendly gas hydrate synthesis system of multipurpose |
| CN112034133A (en) * | 2020-08-06 | 2020-12-04 | 中国科学院广州能源研究所 | Device and method for accelerating generation of natural gas hydrate by using dissolved gas method |
| CN112127849A (en) * | 2019-06-24 | 2020-12-25 | 南京延长反应技术研究院有限公司 | Control system for exploiting combustible ice |
| CN114113534A (en) * | 2021-12-01 | 2022-03-01 | 西南石油大学 | Device and method for testing hydrate phase equilibrium curve of oil-gas mixed transportation pipeline |
-
2016
- 2016-05-06 CN CN201620405553.XU patent/CN206731075U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110237780A (en) * | 2019-05-23 | 2019-09-17 | 兰州理工大学 | A kind of environmentally friendly gas hydrate synthesis system of multipurpose |
| CN110237780B (en) * | 2019-05-23 | 2024-01-26 | 兰州理工大学 | Multipurpose environment-friendly hydrate formation system |
| CN112127849A (en) * | 2019-06-24 | 2020-12-25 | 南京延长反应技术研究院有限公司 | Control system for exploiting combustible ice |
| CN112127849B (en) * | 2019-06-24 | 2021-07-23 | 南京延长反应技术研究院有限公司 | Control system for exploiting combustible ice |
| CN112034133A (en) * | 2020-08-06 | 2020-12-04 | 中国科学院广州能源研究所 | Device and method for accelerating generation of natural gas hydrate by using dissolved gas method |
| CN112034133B (en) * | 2020-08-06 | 2021-08-03 | 中国科学院广州能源研究所 | Device and method for accelerating generation of natural gas hydrate by using dissolved gas method |
| CN114113534A (en) * | 2021-12-01 | 2022-03-01 | 西南石油大学 | Device and method for testing hydrate phase equilibrium curve of oil-gas mixed transportation pipeline |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106010698A (en) | Rapid synthesis device for natural gas hydrate | |
| CN206731075U (en) | A kind of lanthanum chloride hydrate gas-liquid cycle control loop system | |
| US10100264B2 (en) | Experimental loop system for fluidization exploitation of solid-state marine gas hydrate | |
| CN103971577B (en) | CO 2replacement exploitation of gas hydrate experiment simulator | |
| CN110306952B (en) | Test device and test method for replacing natural gas hydrate by carbon dioxide under assistance of depressurization method | |
| CN203931312U (en) | CO 2replacement exploitation of gas hydrate experiment simulator | |
| CN102052065A (en) | Simulation exploiting experiment device for natural gas hydrate | |
| CN102590028A (en) | Multifunctional fluid annular channel experiment device | |
| CN205426212U (en) | Many physics of gas hydrate exploitation field evolution simulating measurement setup | |
| CN102607885A (en) | Gas hydrate sampling and analyzing method and device | |
| CN114017004B (en) | Deep water oil and gas production shaft simulation test device and test method | |
| CN110159227B (en) | Device and method for simulating heating in natural gas hydrate well | |
| CN205635516U (en) | Gas hydrate rapidly synthesizing device | |
| CN102580655B (en) | Gas-liquid two-phase reaction kettle | |
| CN114166937B (en) | Experimental system for decomposing and secondarily generating hydrate in sediment | |
| CN106268520B (en) | Gas hydrates synthesize Wobble plate type reaction kettle system | |
| CN102423662B (en) | Multi-parameter visual test apparatus for marine gas hydrate generation and decomposition | |
| CN110374556B (en) | Natural gas hydrate exploitation device with reservoir stratum multi-level pressure compensation function | |
| CN107638849B (en) | Natural gas hydrate synthesis reaction kettle | |
| Li et al. | Experiment and evaluation on the in-situ rapid preparation of marine non-diagenetic natural gas hydrate | |
| CN110952958A (en) | Natural gas hydrate horizontal well balanced liquid drainage testing device and method | |
| CN216691417U (en) | Oil-gas-water three-phase mixed transportation pump test system | |
| CN111535795B (en) | Simulation detection system for underwater natural gas hydrate wellhead device | |
| CN211666911U (en) | Experimental device for latent oily charge pump fluid transportation return circuit analysis when producing oil to deep sea | |
| CN114839233A (en) | Test pipeline system and method for simulating flow and corrosion of large pipeline |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171212 Termination date: 20180506 |