CN110184107A - A kind of system and application method based on hydrate transportation of natural gas - Google Patents
A kind of system and application method based on hydrate transportation of natural gas Download PDFInfo
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- CN110184107A CN110184107A CN201910448662.8A CN201910448662A CN110184107A CN 110184107 A CN110184107 A CN 110184107A CN 201910448662 A CN201910448662 A CN 201910448662A CN 110184107 A CN110184107 A CN 110184107A
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L7/00—Fuels produced by solidifying fluid fuels
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Abstract
The invention discloses a kind of system and application method based on hydrate transportation of natural gas, it is related to natural gas storage and transportation field, more particularly to a kind of system and application method based on hydrate transportation of natural gas, it is specifically a kind of that lanthanum chloride hydrate is carried out to natural gas by hydrate, storage, decomposes the system recycled.The system comprises hydrate slurry synthesis systems, low temperature hydrate generates system, transmission system, hydrate underground low temperature storage, decomposition of hydrate system, the present invention arranges natural gas and configuration water by gas injection port staged, the injection of gas pressure fluctuation-type, the mode synthesized hydrate slurry of positive and negative reverse vortex formula stirring, and hydrate slurry and natural gas are generated into gas hydrates by spray mode, preparation method quick-reading flow sheets of the present invention is few, solves the blockage problem in water-flow circuit, it can make natural gas storage and transportation in solid form, storage and transportation mode is more flexible convenient.
Description
Technical field
The present invention relates to natural gas storage and transportation field more particularly to a kind of system based on hydrate transportation of natural gas and make
It is specifically a kind of that lanthanum chloride hydrate is carried out to natural gas by hydrate, storage, decomposes the system recycled with method.
Background technique
The huge resource potential of gas hydrates has caused the common concern of oil and gas industry circle, and research direction is not only
In terms of being confined to resource value, while hydrate prevention and treatment, hydrate utilization and hydrate are also covered to the potential shadow of environment
The numerous areas such as sound.Wherein, hydrate utilizes technical research, shows the active situation of comparison in recent years, it has also become natural gas
The frontier of hydrate research Important.
In hydrate using in technology, hydrate storage and transportation natural gas technical research is current one big hot spot, and research not only relates to
And the key technologies such as hydrate rapid synthesis, hydrate safety in transportation and storage and hydrate regasification, and further related to hydrate
Economic feasibility of the storaging and transport technology relative to existing natural gas storaging and transport technology.Studies have shown that hydrate is used for natural gas storage and transportation, no
Natural gas storage and transportation in solid form can only be made, storage and transportation mode is more flexible convenient, and can exempt pipeline construction and maintenance cost,
The exploitation in small-sized or from far-off regions gas field not have piping facility or be unworthy pipeline installation provides a kind of novel storage and transportation
Approach can also play a role in gas field development at sea or ocean inlet natural gas storage and transportation.
Since the generation of gas hydrates is that one liquid one of gas consolidates heterogeneous reaction, the condition of cryogenic high pressure, Er Qieshui are needed
The reaction for closing object needs certain induction time, this has resulted in many difficulties of industrial large-scale production.
(1) mixed problem.Since hydrocarbon gas is mostly not soluble in water, if gas and water cannot come into full contact with, react just very
Hardly possible carries out, so also having agitating device in device, the structure of equipment becomes to compare while generally using bubbling or spray mode
More complex, corresponding reactor cost increases, and the presence of induction time, which makes energy consumption also, becomes relatively high.
(2) elimination of Gas hydrate latent heat.As soon as hydrate generation is an exothermic reaction, to maintain to react required low temperature
Heat caused by reaction must be taken away in time.The hydration reactor small volume in laboratory is easy cooling, but with reactor
The increase of volume, the removal of hydration reaction heat will become highly difficult, especially, for the heat-transfer effect of reactor unit volume
For, when reactor volume increases, tube wall heat transfer area can reduce, and be unfavorable for the removal of Gas hydrate latent heat, so simply
The refrigerating capacity of increase reactor intercooler can not effectively solve heat transfer problem, this is just that the design of large-scale reactor is brought
Many difficulty.
(3) under the conditions of different pressure and temperatures, guest species can change in the hydrate of generation.Gas hydrate
Balancing each other has very big relationship with the ingredient of object, and different gas components has different phase equilibrium lines.It will lead to not
The complexity for generating hydrate with component is different, therefore various gas in the hydrate generated under the conditions of different pressures and temperature
The composition of body has very big difference, selects suitable pressure and temperature value particularly important.
(4) blockage problem in water-flow circuit.Regardless of using bubbling, spray or tubular reactor, due to generation
Hydrate is solid, can all have the problems such as line clogging, circulating pump load increases, these problems are one of reactor design
Problem.
Summary of the invention
The purpose of the present invention is to overcome the above shortcomings and to provide a kind of system based on hydrate transportation of natural gas and make
With method, the system structure is simple, is divided into two section type hydrate preparation flow, combines three kinds of bubbling, stirring, spray hydrates
Preparation method, preparation method quick-reading flow sheets of the present invention is few, solves the blockage problem in water-flow circuit, and natural gas can be made with solid
State form storage and transportation, storage and transportation mode is more flexible convenient, and can exempt pipeline construction and maintenance cost.
The embodiment of the present invention provides a kind of system and application method based on hydrate transportation of natural gas, the system packet
Include hydrate slurry synthesis system, low temperature hydrate generates system, transmission system, hydrate underground low temperature storage, hydrate
Decomposing system.
Wherein the hydrate slurry body synthesis system, low temperature hydrate generate system, decomposition of hydrate system is located at ground
More than, the hydrate underground low temperature storage locates below ground level, the hydrate slurry synthesis system and low temperature hydrate
Generation system is connected, and the low temperature hydrate generates system and is connected by transmission system with hydrate underground low temperature storage
It connects, the decomposition of hydrate system is connected by transmission system with hydrate underground low temperature storage.
The hydrate slurry synthesis system is used to natural gas and configuration water passing through the arrangement of gas injection port staged, natural gas
The mode synthesized hydrate slurry of the injection of pressure wave dynamic formula, the stirring of positive and negative reverse vortex formula；The low temperature hydrate generates system
Gas hydrates are generated by spray mode for generating in container hydrate slurry and natural gas in hydrate；The biography
Dynamic system is used to the hydrate prepared moving into hydrate underground low temperature storage, it may also be used for stores up hydrate underground low temperature
The hydrate stored in hiding library moves into decomposition of hydrate system；Hydrate underground low temperature storage for store prepare it is natural
Gas hydrate；Decomposition of hydrate system is used for decomposition of hydrate into natural gas and configuration water, and natural gas is defeated by gas
Pipeline conveys out.
Preferably, the configuration water includes the water of distilled water, pure water and a certain amount of chemical agent of addition, the chemical drugs
Agent can be surfactant, such as lauryl sodium sulfate (SDS), linear alkyl benzene sulphonate (LABS), hexadecane
Base trimethylammonium bromide (CTAB), nonylphenol polyoxyethylene ether (ENP), sodium lignin sulfonate, the chemical agent can be from
Sub- compound and template, such as calcium hypochlorite, hydrophobicity halide, sorbitan monooleate (Span80).
Preferably, hydrate slurry synthesis system of the invention includes gas transmission line, valve, pressure sensor, temperature biography
Sensor, booster pump, flowmeter, hydrate slurry generating means, waterline, water tank, refrigeration lines, refrigeration unit, hydrate
Slurry pipeline, the gas transmission line connect gas source, the natural gas transportation in gas source to booster pump are pressurized, pressurized natural gas
Hydrate slurry generating means are pumped into, the valve, pressure sensor, temperature sensor, booster pump, flowmeter are via appendix
Line is sequentially connected to hydrate slurry generating means, and the water tank, booster pump, flowmeter, valve successively connect via waterline
Hydrate slurry generating means are connected to, the refrigeration unit is connect by refrigeration lines with hydrate slurry generating means, described
Hydrate slurry fluid line is located at hydrate slurry generating means bottom, moves into water at low temperature for that will synthesize the hydrate slurry finished
It closes object and generates system.
The hydrate slurry generating means include valve, pressure sensor, temperature sensor, motor, water inlet entrance,
Slurry generating means chamber, slurry outlet, erosion resistant coating, refrigerating layer, insulating layer, circulating cooling liquid entrance, circulating cooling liquid go out
Mouth, connecting rod, helical blade, gas injection port, bracket；The slurry generating means chamber is cylindrical shape and erosion resistant coating inner wall phase
Contact, the erosion resistant coating outer wall and refrigerating layer inner wall joint, the refrigerating layer outer wall and insulating layer inner wall joint, the pressure
Force snesor, temperature sensor are connected with erosion resistant coating inner wall, are arranged in cylindrical sides, for monitoring slurry generating means chamber
Room pressure, temperature, the gas injection port are connected with erosion resistant coating inner wall, are arranged in cylindrical sides, fill for generating to slurry
It sets injection natural gas in chamber and pressure is provided, the water inlet entrance, slurry outlet are connected with erosion resistant coating inner wall, are arranged in
Cylindrical body bottom surface, it is described to follow for the hydrate slurry that injection configuration water, discharge preparation finish into slurry generating means chamber
Ring coolant inlet, circulating cooling liquid outlet are connected with refrigerating layer, and the motor is connect by connecting rod with helical blade,
It is arranged in cylindrical body Liang Ge bottom center position, the helical blade is located at slurry generating means chamber interior, and the bracket is solid
Due to insulating layer outer wall.
When the hydrate slurry generating means work, helical blade positive and negative two is driven by two motor, connecting rod
To rotation, reverse vortex is formed, increases slurry generating means chamber interior configuration water and natural gas contact area, under turbulence state
The heat transfer coefficient of water will improve 2-4 times compared with Static Water item ratio, and relatively traditional paddling process prepares gas hydrates, this method contracting
The short nucleation time of lanthanum chloride hydrate, improves hydrate slurry aggregate velocity.
The gas injection port is arranged in hydrate slurry generating means side in staged, with hydrate slurry generating means circle
Column side face height is divided into six equal portions, and two parts close to bottom surface are staged gas injection end one, and two parts close to middle position are rank
Ladder type gas injection end three, two parts among staged gas injection end one, three are staged gas injection end two, and cloth hole density is ladder
Formula gas injection end one: staged gas injection end two: staged gas injection three=3:2:1 of end, in the reverse whirlpool of slurry generating means chamber interior
On the basis of stream, gas injection port staged is arranged gas injection, more improves high slurry generating means chamber interior configuration water and natural
Gas contact area, compared with traditional bubbling method prepares gas hydrates, this method staged gas injection improves hydrate slurry
Aggregate velocity.
The refrigerating layer includes refrigeration diversion pipe, temperature conduction medium, and the refrigeration diversion pipe is located at temperature conduction medium
Inside, the refrigeration diversion pipe are connected with circulating cooling liquid entrance, circulating cooling liquid outlet.
Preferably, the erosion resistant coating material includes stainless steel 304 SS steel, Hastelloy, erosion resistant titanium alloy, titanium copper conjunction
The coating of the metal material or the conventional resistance to natural gas corrosion of metal material addition of gold and other conventional resistance to natural gas corrosions.
Preferably, it includes gas transmission line, booster pump, pressure sensor, flowmeter, valve that the low temperature hydrate, which generates system,
Door, hydrate slurry intermediate receptacle, hydrate slurry fluid line, hydrate generate container, and the gas transmission line connects gas source, by gas
Natural gas transportation in source to booster pump is pressurized, and pressurized natural gas is pumped into hydrate and generates container, the gas source, valve,
Booster pump, pressure sensor, flowmeter, valve are sequentially connected to hydrate via gas transmission line and generate container, the hydrate
Slurry outlet in slurry synthesis system passes through hydrate slurry via valve, hydrate slurry fluid line, booster pump, flowmeter
Pipeline is sequentially connected to hydrate slurry intermediate receptacle, and the hydrate slurry intermediate receptacle is passed via valve, booster pump, pressure
Sensor, flowmeter, valve are sequentially connected to hydrate by hydrate slurry fluid line and generate container.
It includes hydrate slurry inlet, natural gas filling entrance, valve, upper cover plate, fixation that the hydrate, which generates container,
Bolt, container outer wall, sealing folding, sealing buckle, bracket, lower cover plate, the hydrate slurry inlet, natural gas filling entrance
It is arranged at the top of upper cover plate, valve arrangement is in hydrate slurry inlet, natural gas filling entrance upper end, the upper cover plate and container
Outer wall is connected by fixing bolt, and the lower cover plate is connected by sealing folding, sealing buckle with container outer wall, the bracket
It is fixed on outside container outer wall.
The settable spray equipment in hydrate slurry inlet, including spiral spray equipment, microwave type spray equipment,
Ultrasonic type spray equipment and other conventional type spray equipments.
Compared with tradition prepares the method for gas hydrates, the method for the present invention will prepare gas hydrates and be divided into two
Step, one, prepare hydrate slurry, two, prepare gas hydrates, this method greatly enhances and prepares gas hydrates
Efficiency, and two steps are easier to industrialized production, and solve traditional gas hydrates preparation facilities structure compared with
For complexity, water-flow circuit is easy to the problem of blocking.
It includes refrigerating layer and insulating layer that the low temperature hydrate, which generates system wall, is followed successively by refrigeration by internal layer to outer layer
Layer, insulating layer, large-scale refrigeration unit are connected with refrigerating layer.
Preferably, the transmission system includes lifting device, transmission belt, refrigerating layer, insulating layer, drawing and pulling type entrance, described
Refrigerating layer, insulating layer are set to below ground and form refrigeration space, and the transmission belt is located inside refrigeration space, the drawing and pulling type
Entrance is set at the top of refrigeration space, hydrate generates immediately below container, and the transmission belt is connected with lifting device, and being used for will
It prepares the gas hydrates finished to be delivered in lifting device, and is transported in underground low temperature storage and is stored up by lifting device
It deposits.
Preferably, the underground low temperature storage includes concrete layer, refrigerating layer, insulating layer, large-scale refrigeration unit, by interior
Layer is followed successively by concrete layer, refrigerating layer, insulating layer to outer layer, and large-scale refrigeration unit is connected with refrigerating layer.
Preferably, the decomposition of hydrate system includes heating layer, insulating layer, decomposition of hydrate container, gas output tube
Line, the decomposition of hydrate system wall are followed successively by heating layer, insulating layer by internal layer to outer layer.
A kind of application method of the system based on hydrate transportation of natural gas, comprising the following steps:
Step 1 is initially injected configuration water in hydrate slurry synthesis system, is subsequently injected into natural gas, configuration water injection
Amount is 0.8 times of hydrate slurry generating means volume, and natural gas is injected by the gas injection port that staged is arranged, and injection rate is water
80-100 times for closing object slurry generating means volume, natural gas injection pressure are 5MPa, and the 1.2MPa fluctuation-type that floats up and down injects,
Pressure oscillation frequency is that 5 times of slurry generating means volumes of injection change 1MPa, generates hydrate slurry by refrigeration unit and fills
It sets interior reaction temperature and is adjusted to 2 DEG C, reverse vortex, speed 300- are formed to rotation by helical blade positive and negative two
500r/min is completed to react in hydrate slurry generating means, and pressure reduction to 0.1MPa prepares water hereinafter, stopping reaction
Object slurry is closed to finish.
Low temperature hydrate generation system temperature is adjusted to 2 DEG C by step 2, and the hydrate slurry finished will be prepared in step 1
It is delivered to hydrate slurry intermediate receptacle by hydrate slurry fluid line, it will be in hydrate slurry intermediate receptacle by spray process
Natural gas is sprayed to hydrate and generates container, spray pressure 4-5MPa, the injection of hydrate slurry at hydrate slurry and gas source
Amount is 0.85 times that hydrate generates vessel volume, and natural gas injection rate is 64-84 times that hydrate generates vessel volume, hydration
Object slurry Spraying rates are that 0.05-0.1 times of hydrate per minute generates vessel volume, and natural gas charge velocity is 3.2- per minute
8.4 times of hydrates generate vessel volume, generate to react in container to hydrate and complete, pressure reduction to 0.1MPa is hereinafter, stop
Reaction, prepares hydrate and finishes.
Hydrate underground low temperature storage temperature is adjusted to -18 DEG C by step 3, and the hydrate finished will be prepared in step 2
Hydrate underground low temperature storage storage is moved to by transmission system.
The hydrate for being stored in hydrate underground low temperature storage is moved to hydrate point by transmission system by step 4
Gas output tube line is connect by solution system with decomposition of hydrate container, and decomposition of hydrate system temperature is adjusted to hydrate point
The natural gas of solution demand temperature, decomposition of hydrate is exported via gas output tube line, is finished to decomposition of hydrate, decomposition of hydrate
Configuration water be recycled to hydrate slurry synthesis system reuse.
In the step 3, prepares the hydrate finished and the storage of hydrate underground low temperature storage is moved to by transmission system
Hiding can place flour mill, marble forming machine, tank in the underground low temperature storage, hydrate can be carried out powder processed, ball processed,
Directly storage and other conventional storage modes.
Decomposition of hydrate demand temperature in the step 4, is adjusted according to the demand of decomposition of hydrate speed.
The present invention a kind of system process system and equipment arrangement principle based on hydrate transportation of natural gas is as follows:
1, process system arrangement principle
1) whole device should be arranged in given areal extent.
2) having the equipment of vibration should be located in ground base as far as possible, cannot be arranged in the vibratory equipment on ground, it is necessary to design
Special fixed bracket.
3) equipment and pipe arrangement consider the convenience for repairing from now on He more changing the outfit, tearing open as far as possible；
4) pipeline setting should meet requirement of experiment, use the lesser valve of resistance as far as possible, be reduced as far as elbow, drop
Low flow resistance；
5) pipeline arrangement, which will meet, answers force request, makes every effort to neat appearance, small-bore pipeline is connected using welding manner, big mouth
Diameter pipeline uses bite type flanged joint, reduces heavy caliber weld seam quantity to the greatest extent, and weld seam should avoid staying within the scope of bracket as far as possible,
To operate, the installation of equipment, pipe fitting and valve will consider that maintenance is convenient, must not interfere mutually.
6) temperature sensor and pressure sensor should be arranged in that working media flow is in stable condition, the good portion of heat convection
Position, pressure sensor at least should there are the straight pipes of 10 times of pipe diameters as stable section on pipeline.
2, valve selection and arrangement principle
1) valve body material of valve selects stainless steel.
2) valve should be arranged in the place provided easy access to, convenient for operating, repairing.
3) valve is preferably arranged in the small position of piping displacement amount.
4) when the valve rod type valve opening that valve is horizontally mounted, valve rod must not interfere to pass through.
5) the valve rod direction of valve should be vertically upward on horizontal pipe.
3, process system INSULATION DESIGN
According to the regulation of " GB50264-2013 Code for design of heat insulation engineering of industrial equipment and pipe lines ", set to reduce device
Standby, pipeline and its attachment are exchanged with the heat of ambient enviroment, need to take certain cladding measure in its outer surface.
1) it reduces environment in production to heat equipment and pipeline, pipeline and flow media temperature in production process is better achieved
Spend the requirement adjusted.
2) equipment or pipeline that should not be kept the temperature specifically include that require heat dissipation or must exposed equipment and pipeline, require and
The equipment of Shi Faxian leakage and pipe flange, often it must monitor or measure, to prevent the position being damaged, arrange in process system
Gas, emptying etc. do not need the equipment or pipeline of heat preservation.
A kind of system and application method beneficial effect based on hydrate transportation of natural gas of the embodiment of the present invention is: 1)
A kind of system based on hydrate transportation of natural gas of invention creative first, combines three kinds of bubbling, stirring, spray water
Object preparation method is closed, technological gap point has been filled up；2) it is complex to compare traditional gas hydrates preparation facilities structure, water
Circulation loop is easy to the problem of blocking, and present system structure is simple, is divided into two section type hydrate preparation flow, and used note
The arrangement of port staged, the injection of gas pressure fluctuation-type, the stirring of positive and negative reverse vortex formula, largely improve hydrate
Preparation efficiency；3) the present invention is based on the systems of hydrate transportation of natural gas to adjust dress according to practical natural gas supply amount
The size set, volume, it is more flexible to compare traditional gas hydrates preparation facilities, is applicable to the storage of large-scale pipeline gas
Deposit, city gas company's Seasonal Peak Shaving, remote districts use fate is defeated, gas field output gas storage and transportation, application scenarios are compared with horn of plenty；4)
The hydrate storage mode that the present invention generates is flexible, can be directly stored in low temperature storage, can also cold chain transportation to using gas
Area keeps the application of natural gas more convenient by such storage and transportation mode.
Detailed description of the invention
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for
For those skilled in the art, it can also be obtained according to these attached drawings without creative efforts other attached
Figure.
Fig. 1 is a kind of system structure diagram based on hydrate transportation of natural gas；
Fig. 2 is that hydrate slurry synthesis system and low temperature hydrate generate system schematic；
Fig. 3 is hydrate slurry generating means detailed construction schematic diagram；
Fig. 4 is gas injection port staged arrangement schematic diagram；
Fig. 5 is hydrate slurry generating means sectional view；
Fig. 6 is hydrate slurry generating means refrigeration schematic diagram of a layer structure；
Fig. 7 is that hydrate generates container and transmission structure schematic diagram；
Fig. 8 is hydrate underground low temperature storage structural schematic diagram；
Fig. 9 is decomposition of hydrate system structure diagram；
Figure 10 is that low temperature hydrate generates system schematic；
Figure 11 is that gas pressure fluctuation-type injects hydrate slurry generating means schematic diagram；
Figure 12 is embodiment 1 and comparative example hydrate preparation parameter figure；
Figure 13 is embodiment 2 and comparative example hydrate preparation parameter figure；
Figure 14 is embodiment 3 and comparative example hydrate preparation parameter figure；
Drawing reference numeral: 1, gas source 2, gas transmission line 3, valve 4, pressure sensor 5, temperature sensor 6, booster pump 7, flow
Meter 8, hydrate slurry generating means 9, motor 10, waterline 11, water tank 12, refrigeration lines 13, refrigeration unit 14, hydration
Object slurry pipeline 15, hydrate slurry intermediate receptacle 16, hydrate generate container 17, water inlet entrance 18, slurry generating means chamber
Room 19, erosion resistant coating 21, refrigerating layer 22, insulating layer 23, circulating cooling entrance 24, circulating cooling outlet 25, connects slurry outlet 20
Extension bar 26, helical blade 27, gas injection port 28, bracket 29, staged gas injection end 1, staged gas injection end 2 31, staged note
Gas end 3 32, refrigeration diversion pipe 33, temperature conduction medium 34, hydrate slurry inlet 35, natural gas filling entrance 36, upper cover plate
37, fixing bolt 38, container outer wall 39, sealing folding 40, sealing buckle 41, bracket 42, lower cover plate 43, drawing and pulling type entrance 44,
Insulating layer, 45 refrigerating layers 46, conveyer belt, 47 refrigeration spaces, 48, concrete layer 49, large-scale refrigeration unit 50, lifting device 51,
Heating layer 52, decomposition of hydrate container 53, gas output tube line 100, hydrate slurry synthesis system 200, low temperature hydrate are raw
At system 300, transmission system 400, hydrate underground low temperature storage 500, decomposition of hydrate system 600, ground.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that the described embodiment is only a part of the embodiment of the present invention, instead of all the embodiments.Based on this
Embodiment in invention, every other reality obtained by those of ordinary skill in the art without making creative efforts
Example is applied, shall fall within the protection scope of the present invention.
As shown in Figure 1, being a kind of system structure diagram based on hydrate transportation of natural gas, the system comprises water
Close object slurry synthesis system 100, low temperature hydrate generates system 200, transmission system 300, hydrate underground low temperature storage
400, decomposition of hydrate system 500.
In the present embodiment, the hydrate slurry synthesis system 100, low temperature hydrate generate system 200, hydrate point
Solution system 500 is located at 600 or more ground, and the hydrate underground low temperature storage 400 is located at ground 600 hereinafter, the hydration
Object slurry synthesis system 100 generates system 200 with low temperature hydrate and is connected, and the low temperature hydrate generates system 200 and passes through
Transmission system 300 is connected with hydrate underground low temperature storage 400, and the decomposition of hydrate system 500 passes through transmission system
300 are connected with hydrate underground low temperature storage 400.
In the present embodiment, the hydrate slurry synthesis system 100 is used to natural gas and configuration water passing through gas injection port
The mode synthesized hydrate slurry of staged arrangement, the injection of gas pressure fluctuation-type, the stirring of positive and negative reverse vortex formula；It is described low
Warm hydrate generates system 200 and is used in hydrate generation container generate hydrate slurry and natural gas by spray mode
Gas hydrates；The transmission system 300 is used to the hydrate prepared moving into hydrate underground low temperature storage 400,
It can also be used to the hydrate stored in hydrate underground low temperature storage 400 moving into decomposition of hydrate system 500；Hydrate
Lower low temperature storage 400 is for storing the gas hydrates prepared；Decomposition of hydrate system 500 is used for decomposition of hydrate
At natural gas and configuration water, and natural gas is conveyed by gas output tube line.
A kind of above-mentioned system based on hydrate transportation of natural gas is further described below:
As shown in Fig. 2, generating system schematic for hydrate slurry synthesis system of the present invention and low temperature hydrate.
In the present embodiment, the hydrate slurry synthesis system 100 includes gas transmission line 2, valve 3, pressure sensor
4, temperature sensor 5, booster pump 6, flowmeter 7, hydrate slurry generating means 8, waterline 10, water tank 11, refrigeration lines
12, refrigeration unit 13, hydrate slurry fluid line 14, the gas transmission line 2 connect gas source 1, extremely by the natural gas transportation in gas source 1
Booster pump 6 is pressurized, and pressurized natural gas is pumped into hydrate slurry body generating means 8, the valve 3, pressure sensor 4, temperature
Sensor 5, booster pump 6, flowmeter 7 are sequentially connected to hydrate slurry generating means 8 via gas transmission line 2, the water tank 11,
Booster pump 6, flowmeter 7, valve 3 are sequentially connected to hydrate slurry generating means 8, the refrigeration unit via waterline 10
13 are connect by refrigeration lines 12 with hydrate slurry generating means 8, and the hydrate slurry fluid line 14 is located at hydrate slurry
8 bottom of generating means moves into low temperature hydrate generation system 200 for that will synthesize the hydrate slurry finished.
In the present embodiment, it includes gas transmission line 2, booster pump 6, pressure sensing that the low temperature hydrate, which generates system 200,
Device 4, flowmeter 7, valve 3, hydrate slurry intermediate receptacle 15, hydrate slurry fluid line 14, hydrate generate container 16, described
Gas transmission line 2 connects gas source 1, the natural gas transportation in gas source 1 to booster pump 6 is pressurized, pressurized natural gas is pumped into hydration
Object generate container 16, the gas source 1, valve 3, booster pump 6, pressure sensor 4, flowmeter 7, valve 3 via gas transmission line 2 according to
The secondary hydrate that is connected to generates container 16, the slurry outlet 19 in the hydrate slurry synthesis system 100 via valve 3,
Hydrate slurry fluid line 14, booster pump 6, flowmeter 7 are sequentially connected among hydrate slurry by hydrate slurry fluid line 14
Container 15, the hydrate slurry intermediate receptacle 15 are logical via valve 3, booster pump 6, pressure sensor 4, flowmeter 7, valve 3
Perhydrate slurry pipeline 14 is sequentially connected to hydrate and generates container 16.
As shown in figure 3, being hydrate slurry generating means detailed construction schematic diagram of the present invention.
In the present embodiment, the hydrate slurry generating means 8 include valve 3, pressure sensor 4, temperature sensor
5, motor 9, water inlet entrance 17, slurry generating means chamber 18, slurry outlet 19, erosion resistant coating 20, refrigerating layer 21, insulating layer
22, circulating cooling liquid entrance 23, circulating cooling liquid export 24, connecting rod 25, helical blade 26, gas injection port 27, bracket 28；It is described
Slurry generating means chamber 18 is that cylindrical shape is in contact with 20 inner wall of erosion resistant coating, 20 outer wall of erosion resistant coating and refrigerating layer 21
Inner wall joint, 21 outer wall of refrigerating layer and 22 inner wall joint of insulating layer, the pressure sensor 4, temperature sensor 5 with
20 inner wall of erosion resistant coating is connected, and is arranged in cylindrical sides, for monitoring pressure, temperature in slurry generating means chamber 18, institute
It states gas injection port 27 to be connected with 20 inner wall of erosion resistant coating, is arranged in cylindrical sides, for being infused into slurry generating means chamber 18
Enter natural gas and pressure is provided, the water inlet entrance 17, slurry outlet 19 are connected with 20 inner wall of erosion resistant coating, are arranged in cylinder
Body bottom surface, for the hydrate slurry that injection configuration water, discharge preparation finish into slurry generating means chamber 18, the circulation
Coolant inlet 23, circulating cooling liquid outlet 24 are connected with refrigerating layer 21, and the motor 9 passes through connecting rod 25 and helical-blade
Piece 26 connects, and is arranged in cylindrical body Liang Ge bottom center position, the helical blade 26 is located in slurry generating means chamber 18
Portion drives helical blade 26 positive and negative two to rotation, forms reverse vortex by two motor 9, connecting rod 25, can high degree
Configuration water and natural gas contact area, the bracket 28 inside slurry generating means chamber 18 is improved to be fixed on outside insulating layer 22
Wall.
As shown in figure 4, being gas injection port staged arrangement schematic diagram of the present invention
In the present embodiment, the gas injection port 27 is arranged in 8 side of hydrate slurry generating means in staged, with hydration
Object slurry generating means 8 cylindrical sides height is divided into six equal portions, and two parts close to bottom surface are staged gas injection end 1, close
Two parts of middle position are staged gas injection end 3 31, among staged gas injection end 1, staged gas injection end 3 31
Two parts are staged gas injection end 2 30, and cloth hole density is staged gas injection end 1: staged gas injection end 2 30: staged note
Three 31=3:2:1 of gas end, the present embodiment is on the basis of slurry generating means 18 inside reverse vortex of chamber, 27 ladder of gas injection port
Formula arrangement gas injection, more improves and configures water and natural gas contact area inside high slurry generating means chamber 18, with traditional drum
Bubble method prepares gas hydrates and compares, and the present embodiment method improves hydrate slurry aggregate velocity.
As shown in Figure 5,6, be hydrate slurry generating means sectional view, hydrate slurry generating means refrigerating layer structure is shown
It is intended to.
In the present embodiment, the refrigerating layer 21 includes refrigeration diversion pipe 32, temperature conduction medium 33, the refrigeration water conservancy diversion
Pipe 32 is located inside temperature conduction medium 33, and the refrigeration diversion pipe 32 is exported with circulating cooling liquid entrance 23, circulating cooling liquid
24 are connected.
As shown in fig. 7, generating container and transmission structure schematic diagram for hydrate.
In the present embodiment, the hydrate generate container include hydrate slurry inlet 34, natural gas filling entrance 35,
Valve 3, upper cover plate 36, fixing bolt 37, container outer wall 38, sealing folding 39, sealing buckle 40, bracket 41, lower cover plate 42, institute
State hydrate slurry inlet 34, natural gas filling entrance 35 is arranged in the top of upper cover plate 36, valve 3 is arranged in hydrate slurry note
Entrance 34,35 upper end of natural gas filling entrance, the upper cover plate 36 are connect with container outer wall 38 by fixing bolt 37, the lower cover
Plate 42 is connected by sealing folding 39, sealing buckle 40 with container outer wall 38, and the bracket 41 is fixed on outside container outer wall 38
Portion.
Settable spray equipment at the hydrate slurry inlet 34, including spiral spray equipment, microwave type spray dress
It sets, ultrasonic type spray equipment and other conventional type spray equipments.
Compared with tradition prepares the method for gas hydrates, the method for the present invention will prepare gas hydrates and be divided into two
Step, one, prepare hydrate slurry, two, prepare gas hydrates, this method greatly enhances and prepares gas hydrates
Efficiency, and two steps are easier to industrialized production, and solve traditional gas hydrates preparation facilities structure compared with
For complexity, water-flow circuit is easy to the problem of blocking.
As shown in figure 8, being hydrate underground low temperature storage structural schematic diagram.
In the present embodiment, the underground low temperature storage 400 include concrete layer 48, it is refrigerating layer 45, insulating layer 44, big
Type refrigeration unit 49 is followed successively by concrete layer 48, refrigerating layer 45, insulating layer 44 by internal layer to outer layer, large-scale refrigeration unit 49 with
Refrigerating layer 45 is connected.
As shown in Figure 7,8, the transmission system includes lifting device 50, transmission belt 46, refrigerating layer 45, insulating layer 44, takes out
Pull-type entrance 43, the refrigerating layer 45, insulating layer 44 are set to below ground and form refrigeration space 47, and the transmission belt 46 is located at
Inside refrigeration space 47, the drawing and pulling type entrance 43 is set to 47 top of refrigeration space, hydrate generates immediately below container 16, institute
Transmission belt 46 to be stated to be connected with lifting device 50, the gas hydrates for finishing preparation are delivered in lifting device 50,
And it is transported in underground low temperature storage 400 and is stored by lifting device 50.
As shown in figure 9, being decomposition of hydrate system structure diagram.
In the present embodiment, the decomposition of hydrate system 500 includes heating layer 51, insulating layer 44, decomposition of hydrate appearance
Device 52, gas output tube line 53,500 wall of decomposition of hydrate system are followed successively by heating layer 51, heat preservation by internal layer to outer layer
Layer 44.
As shown in Figure 10, system schematic is generated for low temperature hydrate.
In the present embodiment, it includes refrigerating layer 45 and insulating layer 44 that the low temperature hydrate, which generates 200 wall of system, by interior
Layer is followed successively by refrigerating layer 45, insulating layer 44 to outer layer, and large-scale refrigeration unit 49 is connected with refrigerating layer 45.
Below based on a kind of corresponding system based on hydrate transportation of natural gas of above-mentioned attached drawing to the embodiment of the present invention
Application method introduced as follows, the application method of the embodiment of the present invention is divided into following steps:
Step 1 is initially injected configuration water in hydrate slurry synthesis system 100, is subsequently injected into natural gas, and natural gas is logical
The gas injection port 27 for crossing staged arrangement injects, and natural gas injection pressure is 5MPa, the 1.2MPa fluctuation-type that floats up and down injection, pressure
Vibration frequency is that 5 times of 8 volumes of hydrate slurry generating means of injection change 1MPa, by refrigeration unit 13 that hydrate slurry is raw
2 DEG C are adjusted at 8 interior reaction temperature of device, reverse vortex is formed to rotation by helical blade 26 positive and negative two, to hydrate slurry
Reaction is completed in body generating means 8, and pressure reduction to 0.1MPa prepares hydrate slurry and finish hereinafter, stopping reaction, the day
Right wave dynamic formula injection mode is referring to Figure 11.
Low temperature hydrate generation 200 temperature of system is adjusted to 2 DEG C by step 2, and the hydrate finished will be prepared in step 1
Slurry is delivered to hydrate slurry intermediate receptacle 15 by hydrate slurry fluid line 14, will be among hydrate slurry by spray process
Natural gas is sprayed to hydrate and generates container 16 at hydrate slurry and gas source 1 in container 15, generates container 16 to hydrate
Interior reaction is completed, and pressure reduction to 0.1MPa prepares hydrate and finish hereinafter, stopping reaction, sealing buckle 40 is opened, by lower cover
Plate 42, drawing and pulling type entrance 43 are opened, and the gas hydrates that preparation finishes are placed in transmission belt 46.
400 temperature of hydrate underground low temperature storage is adjusted to -18 DEG C by step 3, and the water finished will be prepared in step 2
It closes object and the storage of hydrate underground low temperature storage 400 is moved to by transmission belt 46, lifting device 50.
The hydrate for being stored in hydrate underground low temperature storage 400 is moved to hydration by lifting device 50 by step 4
Gas output tube line 53 is connect by object decomposing system 500 with decomposition of hydrate container 52, by 500 temperature of decomposition of hydrate system
It is adjusted to decomposition of hydrate demand temperature, the natural gas of decomposition of hydrate is exported via gas output tube line 53, to hydrate point
Solution finishes, and the configuration water of decomposition of hydrate is recycled to the reuse of hydrate slurry synthesis system 100.
In the step 3, prepares the hydrate finished and hydrate underground low temperature storage is moved to by transmission system 300
400 store, and can place flour mill, marble forming machine, tank in the underground low temperature storage 400, can be by hydrate system
Powder, ball processed, directly storage and other conventional storage modes.
Decomposition of hydrate demand temperature in the step 4, is adjusted according to the demand of decomposition of hydrate speed.
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
The every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
Embodiment 1:
The application method of embodiment 1 is divided into following steps:
Step 1, hydrate slurry prepare link, by configuring the configuration water in the extraction water tank 11 of water booster pump 6, by defeated
Water pipeline 10 is pumped into hydrate slurry generating means 8 for water is configured, and makes to configure water full of slurry generating means chamber 18, passes through gas
Body booster pump 6 injects natural gas into hydrate slurry generating means 8 and configuration water is discharged, and drains adjustment configuration water by gas injection
Storage is 0.8 times of 8 volume of hydrate slurry generating means, will be anti-in hydrate slurry generating means 8 by refrigeration unit 13
Temperature is answered to be adjusted to 2 DEG C, natural gas is injected by the gas injection port 27 that staged is arranged, and natural gas injection pressure is 5MPa, up and down
The injection of floating 1.2MPa fluctuation-type, pressure oscillation frequency are that five times of 8 volumes of hydrate slurry generating means of injection change 1MPa, are led to
It crosses helical blade 26 positive and negative two and forms reverse vortex to rotation, completed to be reacted in hydrate slurry generating means 8, pressure reduction
It to 0.1MPa hereinafter, stopping reaction, prepares hydrate slurry and finishes, pass through pressure sensor 4, temperature sensor in preparation process
Temperature, pressure change inside 5 real-time monitoring hydrate slurry generating means 8.
Low temperature hydrate generation 200 temperature of system is adjusted to 2 DEG C by step 2, and the hydrate finished will be prepared in step 1
Slurry is delivered to hydrate slurry intermediate receptacle 15 by hydrate slurry fluid line 14, will be among hydrate slurry by spray process
Hydrate slurry in container 15 is sprayed to hydrate by hydrate slurry inlet 34 and generates container 16, hydrate slurry note
Entering amount is 0.85 times that hydrate generates 16 volume of container, is pumped into the natural gas in gas source 1 naturally by natural gas boosting pump 6
Gas inlet 35 enters hydrate and generates container 16, generates to react in container 16 to hydrate and complete, pressure reduction to 0.1MPa
Hereinafter, stopping reaction, prepares hydrate and finish.
Hydrate underground low temperature storage 400,47 temperature of refrigeration space are adjusted to -18 DEG C by step 3, open sealing card
Button 40, lower cover plate 42, drawing and pulling type entrance 43 are opened, and the gas hydrates that preparation finishes are placed in transmission belt 46, are led to
Cross transmission belt 46, lifting device 50 is moved to the storage of hydrate underground low temperature storage 400.
The hydrate for being stored in hydrate underground low temperature storage 400 is moved to water by transmission system 300 by step 4
Object decomposing system 500 is closed, gas output tube line 53 is connect with decomposition of hydrate container 52, by 500 temperature of decomposition of hydrate system
Degree is adjusted to decomposition of hydrate demand temperature, and the natural gas of decomposition of hydrate is exported via gas output tube line 53, to hydrate
Decomposition finishes, and the configuration water of decomposition of hydrate is recycled to the reuse of hydrate slurry synthesis system 100.
The hydrate slurry generating means volume selected in the step 1 is 5m3, natural gas injection rate is hydrate slurry
80 times of generating means volume, i.e. 400m3, injection rate is 4 times of hydrates slurry generating means volume per minute, i.e. 20m3, rotation
Turning frequency is 300r/min, and the configuration water is to add lauryl sodium sulfate (SDS) in distilled water, additive amount 0.15g/L.
In the step 2, hydrate slurry spray pressure, natural gas injection pressure are 4MPa, and natural gas injection rate is water
84 times that object generates vessel volume are closed, i.e. 420m3, hydrate slurry Spraying rates are that 0.05 times of hydrate per minute generates container
Volume, natural gas charge velocity are that 8.4 times of hydrates per minute generate vessel volume.
The configuration water is 4m using volume3, Natural gas consumption 820m3, 3 same parameters of use of the setting of embodiment 1
Comparative example, comparative example 1, spray process, design parameter be configuration water spray rate be 0.2m3/ min, natural gas charge velocity are
27m3/min；Comparative example 2, Bubbling method, design parameter are bubbling rate 20m3/min；Comparative example 3, paddling process, design parameter are to stir
Mixing frequency is 300r/min, gas injection speed 20m3/ min, three comparative example reaction temperatures are 2 DEG C.
Specific gas hydrates generation parameter is as shown in figure 12 in embodiment 1, and abscissa is that hydrate generates instead in figure
Between seasonable, ordinate is the pressure change in hydrate formation, from embodiment of the present invention method 1 known to data compared with comparative example
1 spray process saves 59.4% preparation time, compared with the preparation time that 2 Bubbling method of comparative example saves 53.3%, compared with comparative example 3
Paddling process saves 58.3% preparation time, it can be seen that the method for the present invention is more compared with conventional natural gas hydrate preparation method
Efficiently.
Embodiment 2:
The application method of embodiment 2 is divided into following steps:
Step 1, hydrate slurry prepare link, by configuring the configuration water in the extraction water tank 11 of water booster pump 6, by defeated
Water pipeline 10 is pumped into hydrate slurry generating means 8 for water is configured, and makes to configure water full of slurry generating means chamber 18, passes through gas
Body booster pump 6 injects natural gas into hydrate slurry generating means 8 and configuration water is discharged, and drains adjustment configuration water by gas injection
Storage is 0.8 times of 8 volume of hydrate slurry generating means, will be anti-in hydrate slurry generating means 8 by refrigeration unit 13
Temperature is answered to be adjusted to 2 DEG C, natural gas is injected by the gas injection port 27 that staged is arranged, and natural gas injection pressure is 5MPa, up and down
The injection of floating 1.2MPa fluctuation-type, pressure oscillation frequency are that five times of 8 volumes of hydrate slurry generating means of injection change 1MPa, are led to
It crosses helical blade 26 positive and negative two and forms reverse vortex to rotation, completed to be reacted in hydrate slurry generating means 8, pressure reduction
It to 0.1MPa hereinafter, stopping reaction, prepares hydrate slurry and finishes, pass through pressure sensor 4, temperature sensor in preparation process
Temperature, pressure change inside 5 real-time monitoring hydrate slurry generating means 8.
Low temperature hydrate generation 200 temperature of system is adjusted to 2 DEG C by step 2, and the hydrate finished will be prepared in step 1
Slurry is delivered to hydrate slurry intermediate receptacle 15 by hydrate slurry fluid line 14, will be among hydrate slurry by spray process
Hydrate slurry in container 15 is sprayed to hydrate by hydrate slurry inlet 34 and generates container 16, hydrate slurry note
Entering amount is 0.85 times that hydrate generates 16 volume of container, is pumped into the natural gas in gas source 1 naturally by natural gas boosting pump 6
Gas inlet 35 enters hydrate and generates container 16, generates to react in container 16 to hydrate and complete, pressure reduction to 0.1MPa
Hereinafter, stopping reaction, prepares hydrate and finish.
Hydrate underground low temperature storage 400,47 temperature of refrigeration space are adjusted to -18 DEG C by step 3, open sealing card
Button 40, lower cover plate 42, drawing and pulling type entrance 43 are opened, and the gas hydrates that preparation finishes are placed in transmission belt 46, are led to
Cross transmission belt 46, lifting device 50 is moved to the storage of hydrate underground low temperature storage 400.
The hydrate for being stored in hydrate underground low temperature storage 400 is moved to water by transmission system 300 by step 4
Object decomposing system 500 is closed, gas output tube line 53 is connect with decomposition of hydrate container 52, by 500 temperature of decomposition of hydrate system
Degree is adjusted to decomposition of hydrate demand temperature, and the natural gas of decomposition of hydrate is exported via gas output tube line 53, to hydrate
Decomposition finishes, and the configuration water of decomposition of hydrate is recycled to the reuse of hydrate slurry synthesis system 100.
The hydrate slurry generating means volume selected in the step 1 is 5m3, natural gas injection rate is hydrate slurry
90 times of generating means volume, i.e. 450m3, injection rate is 4 times of hydrates slurry generating means volume per minute, i.e. 20m3, rotation
Turning frequency is 400r/min, and the configuration water is to add linear alkyl benzene sulphonate (LABS) in distilled water, and additive amount is
0.2g/L。
In the step 2, hydrate slurry spray pressure, natural gas injection pressure are 4.5MPa, and natural gas injection rate is
Hydrate generates 74 times of vessel volume, i.e. 370m3, hydrate slurry Spraying rates are 0.075 times of hydrate per minute generation
Vessel volume, natural gas charge velocity are that 5.8 times of hydrates per minute generate vessel volume.
The configuration water is 4m using volume3, Natural gas consumption 820m3, 3 same parameters of use of the setting of embodiment 2
Comparative example, comparative example 4, spray process, design parameter be configuration water spray rate be 0.2m3/ min, natural gas charge velocity are
30m3/min；Comparative example 5, Bubbling method, design parameter are bubbling rate 20m3/min；Comparative example 6, paddling process, design parameter are to stir
Mixing frequency is 400r/min, gas injection speed 20m3/ min, three comparative example reaction temperatures are 2 DEG C.
Specific gas hydrates generation parameter is as shown in figure 13 in embodiment 2, and abscissa is that hydrate generates instead in figure
Between seasonable, ordinate is the pressure change in hydrate formation, from embodiment of the present invention method 2 known to data compared with comparative example
4 spray process save 54.5% preparation time, compared with the preparation time that 5 Bubbling method of comparative example saves 43.9%, compared with comparative example 6
Paddling process saves 46.2% preparation time, it can be seen that the method for the present invention is more compared with conventional natural gas hydrate preparation method
Efficiently.
Embodiment 3:
The application method of embodiment 3 is divided into following steps:
Step 1, hydrate slurry prepare link, by configuring the configuration water in the extraction water tank 11 of water booster pump 6, by defeated
Water pipeline 10 is pumped into hydrate slurry generating means 8 for water is configured, and makes to configure water full of slurry generating means chamber 18, passes through gas
Body booster pump 6 injects natural gas into hydrate slurry generating means 8 and configuration water is discharged, and drains adjustment configuration water by gas injection
Storage is 0.8 times of 8 volume of hydrate slurry generating means, will be anti-in hydrate slurry generating means 8 by refrigeration unit 13
Temperature is answered to be adjusted to 2 DEG C, natural gas is injected by the gas injection port 27 that staged is arranged, and natural gas injection pressure is 5MPa, up and down
The injection of floating 1.2MPa fluctuation-type, pressure oscillation frequency are that five times of 8 volumes of hydrate slurry generating means of injection change 1MPa, are led to
It crosses helical blade 26 positive and negative two and forms reverse vortex to rotation, completed to be reacted in hydrate slurry generating means 8, pressure reduction
It to 0.1MPa hereinafter, stopping reaction, prepares hydrate slurry and finishes, pass through pressure sensor 4, temperature sensor in preparation process
Temperature, pressure change inside 5 real-time monitoring hydrate slurry generating means 8.
Low temperature hydrate generation 200 temperature of system is adjusted to 2 DEG C by step 2, and the hydrate finished will be prepared in step 1
Slurry is delivered to hydrate slurry intermediate receptacle 15 by hydrate slurry fluid line 14, will be among hydrate slurry by spray process
Hydrate slurry in container 15 is sprayed to hydrate by hydrate slurry inlet 34 and generates container 16, hydrate slurry note
Entering amount is 0.85 times that hydrate generates 16 volume of container, is pumped into the natural gas in gas source 1 naturally by natural gas boosting pump 6
Gas inlet 35 enters hydrate and generates container 16, generates to react in container 16 to hydrate and complete, pressure reduction to 0.1MPa
Hereinafter, stopping reaction, prepares hydrate and finish.
Hydrate underground low temperature storage 400,47 temperature of refrigeration space are adjusted to -18 DEG C by step 3, open sealing card
Button 40, lower cover plate 42, drawing and pulling type entrance 43 are opened, and the gas hydrates that preparation finishes are placed in transmission belt 46, are led to
Cross transmission belt 46, lifting device 50 is moved to the storage of hydrate underground low temperature storage 400.
The hydrate for being stored in hydrate underground low temperature storage 400 is moved to water by transmission system 300 by step 4
Object decomposing system 500 is closed, gas output tube line 53 is connect with decomposition of hydrate container 52, by 500 temperature of decomposition of hydrate system
Degree is adjusted to decomposition of hydrate demand temperature, and the natural gas of decomposition of hydrate is exported via gas output tube line 53, to hydrate
Decomposition finishes, and the configuration water of decomposition of hydrate is recycled to the reuse of hydrate slurry synthesis system 100.
The hydrate slurry generating means volume selected in the step 1 is 5m3, natural gas injection rate is hydrate slurry
100 times of generating means volume, i.e. 500m3, injection rate is 4 times of hydrates slurry generating means volume per minute, i.e. 20m3,
Speed is 500r/min, and the configuration water is to add cetyl trimethylammonium bromide (CTAB) in distilled water, additive amount
For 0.2g/L.
In the step 2, hydrate slurry spray pressure, natural gas injection pressure are 5MPa, and natural gas injection rate is water
64 times that object generates vessel volume are closed, i.e. 320m3, hydrate slurry Spraying rates are that 0.1 times of hydrate per minute generates container
Volume, natural gas charge velocity are that 3.2 times of hydrates per minute generate vessel volume.
The configuration water is 4m using volume3, Natural gas consumption 820m3, 3 same parameters of use of the setting of embodiment 3
Comparative example, comparative example 7, spray process, design parameter be configuration water spray rate be 0.2m3/ min, natural gas charge velocity are
27m3/min；Comparative example 8, Bubbling method, design parameter are bubbling rate 20m3/min；Comparative example 9, paddling process, design parameter are to stir
Mixing frequency is 400r/min, gas injection speed 20m3/ min, three comparative example reaction temperatures are 2 DEG C.
Specific gas hydrates generation parameter is as shown in figure 13 in embodiment 3, and abscissa is that hydrate generates instead in figure
Between seasonable, ordinate is the pressure change in hydrate formation, from embodiment of the present invention method 3 known to data compared with comparative example
7 spray process save 52.9% preparation time, compared with the preparation time that 8 Bubbling method of comparative example saves 48.2%, compared with comparative example 9
Paddling process saves 43.4% preparation time, it can be seen that the method for the present invention is more compared with conventional natural gas hydrate preparation method
Efficiently.
Particular embodiments described above has carried out further in detail the purpose of the present invention, technical scheme and beneficial effects
Describe in detail it is bright, it should be understood that the above is only a specific embodiment of the present invention, the guarantor being not intended to limit the present invention
Range is protected, all within the spirits and principles of the present invention, any modification, equivalent substitution, improvement and etc. done should be included in this
Within the protection scope of invention.
Claims (8)
1. a kind of system and application method based on hydrate transportation of natural gas, which is characterized in that the system comprises hydrations
Object slurry synthesis system, low temperature hydrate generate system, transmission system, hydrate underground low temperature storage, decomposition of hydrate system
System；
Wherein the hydrate slurry body synthesis system generates system with low temperature hydrate and is connected, and the low temperature hydrate generates system
System is connected by transmission system with hydrate underground low temperature storage, and the decomposition of hydrate system passes through transmission system and water
Object underground low temperature storage is closed to be connected；
The hydrate slurry synthesis system is used to natural gas and configuration water passing through the arrangement of gas injection port staged, gas pressure
The mode synthesized hydrate slurry of fluctuation-type injection, the stirring of positive and negative reverse vortex formula；The low temperature hydrate generates system and is used for
Hydrate slurry and natural gas are generated in container in hydrate, gas hydrates are generated by spray mode；The power train
System is for moving into hydrate underground low temperature storage for the hydrate prepared, it may also be used for by hydrate underground low temperature storage
The hydrate of middle storage moves into decomposition of hydrate system；Hydrate underground low temperature storage is for storing the gas water prepared
Close object；Decomposition of hydrate system is used for decomposition of hydrate into natural gas and configuration water, and natural gas is passed through gas output tube
Line conveying；
A kind of application method of the system based on hydrate transportation of natural gas, comprising the following steps:
Step 1 is initially injected configuration water in hydrate slurry synthesis system, is subsequently injected into natural gas, and configuration water injection rate is
0.8 times of hydrate slurry generating means volume, natural gas are injected by the gas injection port that staged is arranged, and injection rate is hydrate
80-100 times of slurry generating means volume, natural gas injection pressure are 5MPa, the 1.2MPa fluctuation-type that floats up and down injection, pressure
Vibration frequency is that 5 times of slurry generating means volumes of injection change 1MPa, will be in hydrate slurry generating means by refrigeration unit
Reaction temperature is adjusted to 2 DEG C, forms reverse vortex, speed 300-500r/ to rotation by helical blade positive and negative two
Min is completed to react in hydrate slurry generating means, and pressure reduction to 0.1MPa prepares hydrate slurry hereinafter, stopping reaction
Body finishes；
Low temperature hydrate generation system temperature is adjusted to 2 DEG C by step 2, and the hydrate slurry and gas finished will be prepared in step 1
Natural gas is sprayed to hydrate and generates container, spray pressure 4-5MPa at source, and hydrate slurry injection rate is hydrate generation
0.85 times of vessel volume, natural gas injection rate are 64-84 times that hydrate generates vessel volume, hydrate slurry Spraying rates
Vessel volume is generated for 0.05-0.1 times of hydrate per minute, natural gas charge velocity is raw for 3.2-8.4 times of hydrate per minute
It at vessel volume, generates to react in container to hydrate and complete, pressure reduction to 0.1MPa is hereinafter, stop reacting, preparation hydration
Object finishes；
Hydrate underground low temperature storage temperature is adjusted to -18 DEG C by step 3, and the hydrate finished will be prepared in step 2 and is passed through
Transmission system is moved to hydrate underground low temperature storage storage；
The hydrate for being stored in hydrate underground low temperature storage is moved to decomposition of hydrate system by transmission system by step 4
System, gas output tube line is connect with decomposition of hydrate container, and decomposition of hydrate system temperature, which is adjusted to decomposition of hydrate, to be needed
Temperature is sought, the natural gas of decomposition of hydrate is exported via gas output tube line, finished to decomposition of hydrate, decomposition of hydrate is matched
It sets water and is recycled to the reuse of hydrate slurry synthesis system.
2. a kind of system and application method based on hydrate transportation of natural gas as described in claim 1, which is characterized in that
The hydrate slurry synthesis system includes gas transmission line, valve, pressure sensor, temperature sensor, booster pump, flow
Meter, hydrate slurry generating means, waterline, water tank, refrigeration lines, refrigeration unit, hydrate slurry fluid line；
The gas transmission line connects gas source, and the natural gas transportation in gas source to booster pump is pressurized, and pressurized natural gas is pumped into
Hydrate slurry generating means, the valve, pressure sensor, temperature sensor, booster pump, flowmeter via gas transmission line according to
Secondary to be connected to hydrate slurry generating means, the water tank, booster pump, flowmeter, valve are sequentially connected to via waterline
Hydrate slurry generating means, the refrigeration unit are connect by refrigeration lines with hydrate slurry generating means, the hydration
Object slurry pipeline is located at hydrate slurry generating means bottom, moves into low temperature hydrate for that will synthesize the hydrate slurry finished
Generation system.
3. a kind of system and application method based on hydrate transportation of natural gas as claimed in claim 2, which is characterized in that
The hydrate slurry generating means include valve, pressure sensor, temperature sensor, motor, water inlet entrance, slurry generation
Device chamber, slurry outlet, erosion resistant coating, refrigerating layer, insulating layer, circulating cooling liquid entrance, circulating cooling liquid outlet, connection
Bar, helical blade, gas injection port, bracket；
The slurry generating means chamber is that cylindrical shape is in contact with erosion resistant coating inner wall, the erosion resistant coating outer wall and refrigerating layer
Inner wall joint, the refrigerating layer outer wall and insulating layer inner wall joint, the pressure sensor, temperature sensor and erosion resistant coating
Inner wall is connected, and is arranged in cylindrical sides, for monitoring slurry generating means cavity indoor pressure, temperature, the gas injection port with
Erosion resistant coating inner wall is connected, and is arranged in cylindrical sides, for injecting natural gas into slurry generating means chamber and providing pressure
Power, the water inlet entrance, slurry outlet are connected with erosion resistant coating inner wall, are arranged in cylindrical body bottom surface, for generating to slurry
The hydrate slurry that injection configuration water, discharge preparation finish in device chamber, the circulating cooling liquid entrance, circulating cooling liquid go out
Mouth is connected with refrigerating layer, and the motor is connect by connecting rod with helical blade, is arranged in cylindrical body Liang Ge bottom center
Position, the helical blade are located at slurry generating means chamber interior, and the bracket is fixed on insulating layer outer wall；
The gas injection port is arranged in hydrate slurry generating means side in staged, with hydrate slurry generating means cylindrical body
Profile height is divided into six equal portions, and two parts close to bottom surface are staged gas injection end one, and two parts close to middle position are staged
Gas injection end three, two parts among staged gas injection end one, three are staged gas injection end two, and cloth hole density is staged note
Gas end one: staged gas injection end two: staged gas injection three=3:2:1 of end.
4. a kind of system and application method based on hydrate transportation of natural gas as described in claim 1, which is characterized in that
It includes gas transmission line, booster pump, pressure sensor, flowmeter, valve, hydrate that the low temperature hydrate, which generates system,
Slurry intermediate receptacle, hydrate slurry fluid line, hydrate generate container；
The gas transmission line connects gas source, and the natural gas transportation in gas source to booster pump is pressurized, and pressurized natural gas is pumped into
Hydrate generates container, and the gas source, valve, booster pump, pressure sensor, flowmeter, valve successively connect via gas transmission line
It is connected to hydrate and generates container, the slurry outlet in the hydrate slurry synthesis system is via valve, hydrate slurry pipe
Line, booster pump, flowmeter are sequentially connected to hydrate slurry intermediate receptacle, the hydrate slurry by hydrate slurry fluid line
Intermediate receptacle is sequentially connected to water by hydrate slurry fluid line via valve, booster pump, pressure sensor, flowmeter, valve
It closes object and generates container.
5. a kind of system and application method based on hydrate transportation of natural gas as described in claim 4, feature exist
In, the hydrate generate container include hydrate slurry inlet, natural gas filling entrance, valve, upper cover plate, fixing bolt,
Container outer wall, sealing folding, sealing buckle, bracket, lower cover plate, the hydrate slurry inlet, natural gas filling entrance arrangement
At the top of upper cover plate, valve arrangement is in hydrate slurry inlet, natural gas filling entrance upper end, the upper cover plate and container outer wall
It is connected by fixing bolt, the lower cover plate is connected by sealing folding, sealing buckle with container outer wall, and the bracket is fixed
Outside container outer wall.
6. a kind of system and application method based on hydrate transportation of natural gas as described in claim 1, which is characterized in that
The transmission system includes lifting device, transmission belt, refrigerating layer, insulating layer, drawing and pulling type entrance, and the refrigerating layer, insulating layer are set
It is placed in below ground and forms refrigeration space, the transmission belt is located inside refrigeration space, and the drawing and pulling type entrance is set to refrigeration
Top of space, hydrate generate immediately below container, and the transmission belt is connected with lifting device, for will prepare finish it is natural
Gas hydrate is delivered in lifting device, and is transported in underground low temperature storage and is stored by lifting device.
7. a kind of system and application method based on hydrate transportation of natural gas as described in claim 1, which is characterized in that
The underground low temperature storage includes concrete layer, refrigerating layer, insulating layer, large-scale refrigeration unit, is followed successively by by internal layer to outer layer
Concrete layer, refrigerating layer, insulating layer, large-scale refrigeration unit are connected with refrigerating layer.
8. a kind of system and application method based on hydrate transportation of natural gas as described in claim 1, which is characterized in that
The decomposition of hydrate system includes heating layer, insulating layer, decomposition of hydrate container, gas output tube line, the hydrate point
It solves system wall and heating layer, insulating layer is followed successively by by internal layer to outer layer.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111577213A (en) * | 2020-05-28 | 2020-08-25 | 广东工业大学 | System and method for solid-state storage and transportation of gas produced by ocean combustible ice |
| CN112221432A (en) * | 2020-09-25 | 2021-01-15 | 河南理工大学 | Hydrate generating, storing and transporting integrated device |
| CN114591770A (en) * | 2022-01-26 | 2022-06-07 | 中冶南方工程技术有限公司 | Coal-based natural gas hydrate slurry and preparation method thereof |
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