CN108671858B - Quick synthesis device and method for hydrate - Google Patents
Quick synthesis device and method for hydrate Download PDFInfo
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- CN108671858B CN108671858B CN201810885514.8A CN201810885514A CN108671858B CN 108671858 B CN108671858 B CN 108671858B CN 201810885514 A CN201810885514 A CN 201810885514A CN 108671858 B CN108671858 B CN 108671858B
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Abstract
The invention relates to a rapid synthesis device and method for a hydrate, and belongs to the technical field of natural gas hydrate application. Designing a hydration reaction stirring system, and arranging stirring pieces with different specifications at different positions to realize irregular disturbance of the hydration reaction system; designing a hydration reaction circumferential self-rotation system, and realizing circumferential stirring of a hydration reaction stirring system by means of liquid kinetic energy; the hydration reaction axial self-rotation system is designed, the structure of a liquid inlet nozzle is changed, and the axial stirring of the hydration reaction stirring system is realized by means of high-pressure liquid potential energy, kinetic energy and spring elastic potential energy; and designing an agitating umbrella, changing the size of bubbles in the hydration reaction system, and accelerating the hydration reaction rate. The invention mainly aims at the problems of high stirring energy consumption, low reaction rate, low gas storage capacity and the like in the production process of the hydrate, designs a device and a method for rapidly synthesizing the hydrate, realizes continuous, rapid and efficient preparation of the hydrate, and provides a new way for the storage and transportation process of natural gas.
Description
Technical Field
The invention relates to a rapid synthesis device and method for a hydrate, and belongs to the technical field of natural gas hydrate application.
Background
The gas source in China is far away from the consumer market, the pipeline investment is large, the pipeline is difficult to lay, and the development of a non-pipeline gas supply scheme is undoubtedly helpful for relieving the shortage of energy supply and demand in China. Currently, the main non-pipeline gas supply schemes mainly include Compressed Natural Gas (CNG) and Liquefied Natural Gas (LNG). On the other hand, as the research of the related technology of Natural Gas Hydrate (NGH) is gradually matured, the technology and economic advantages of the technology and the economic advantages of the technology are gradually revealed by adopting the NGH technology for natural gas storage and transportation.
The NGH technology has low requirements on production equipment, low production cost and relatively easy realization of storage conditions, equipment for storing natural gas in a hydrate state does not need to bear high pressure, the thermal conductivity of the NGH is 18.7W/(m DEG C), the NGH is lower than that of a common heat insulation material (about 27W/(m DEG C)), special heat insulation measures are not needed, the storage tank can be manufactured by common steel materials, the requirements on the materials are low, the safety in the storage and transportation processes is relatively highest, and the development potential and the attractive prospect of the natural gas hydrate are fully displayed.
The JFE engineering company in Japan applies the tubular reactor technology to the rapid production of natural gas hydrate at first, and the reactor adopts a structure similar to a heat exchanger, so that the cooling effect is good, the heat released by the generated hydrate can be timely taken away, and the rapid generation of the hydrate is promoted. Japanese Mitssubishi Heavy Ind Ltd also proposes a relatively new tubular hydration reactor in which gas-liquid phases are sufficiently mixed and reacted in a tube, and the heat of reaction is removed by spraying a cooling medium outside the tube. Compared with the conventional reactor, the reactor has the advantages of simple structure, low cost, low energy consumption and easier engineering amplification; because the temperature at the pipe wall of the reactor is the lowest, the hydrate is always formed at the pipe wall first, and meanwhile, because of the existence of a fluid boundary layer, the hydrate adhered to the pipe wall is not easy to wash away and grow and accumulate towards the center, so that the formed hydrate is easy to block the reaction pipe, and the hydrate is difficult to take out.
The jet hydration reactor was studied by MitsuiEng & ship builde Co Ltd, japan. The low-temperature water is circulated by the high-pressure pump and then is sprayed by the ejector, and meanwhile, the natural gas is sucked, mixed and then sprayed into the human reactor. The company further provides a novel jet hydration reactor with a mechanical stirring device, so that the gas-liquid mixing effect is improved, and the mass transfer rate is increased. Lin Yula a novel jet hydration reactor combining jet device and static mixer is provided, so that bubbles are further refined, and the gas-liquid mass transfer capability is improved. Because the gas is sucked under low pressure by virtue of jet flow, the flow rate of the gas cannot be large, and the concentration of the generated hydrate slurry is small; maintaining a high velocity jet of liquid; the required applied energy is also large.
At present, japan, norway and other countries have started industrial production tests, the gas storage ratio of NGH is relatively low, and the production and storage and transportation processes of natural gas hydrate are still immature, and the industrial production of the natural gas hydrate is not realized yet. Therefore, the design of the natural gas hydration reactor improves the formation rate of the hydrate and has important significance for realizing economic and efficient storage and transportation of the natural gas.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, designs a rapid synthesis device for the hydrate, provides a rapid synthesis method for the hydrate matched with the device, realizes continuous, rapid and efficient preparation of the natural gas hydrate, and provides a new way for a natural gas storage and transportation process.
The invention mainly solves the following problems:
(1) The hydration reaction stirring system is designed, stirring pieces with different specifications are arranged at different positions of the hydration reaction system, and irregular disturbance of the hydration reaction system is realized through circumferential and axial movement of the stirring system, so that quick progress of hydration reaction is promoted.
(2) The hydration reaction circumferential self-rotation system is designed, and the impact influence of the liquid on the rotation wheel is realized by means of the impact influence of the liquid after the pressurization of the water delivery pump, so that the hydration reaction stirring system is used for realizing continuous circumferential stirring.
(3) The axial self-rotation system of the hydration reaction is designed, the structure of the liquid inlet nozzle is changed, and the axial stirring of the stirring system of the hydration reaction is completed by means of potential energy and kinetic energy of high-pressure liquid and elastic potential energy of a spring.
(4) The stirring umbrella is designed, and the aggregation rate of gas at the gas inlet nozzle is reduced by continuously rotating the stirring umbrella, so that the bubble size of the hydration reaction system is changed.
(5) The hydrate synthesis method matched with the device is designed, and the rapid preparation, economical and efficient preparation of the natural gas hydrate is realized.
In order to achieve the above object, the present invention has the following technical scheme.
The rapid hydrate synthesis device comprises a liquid inlet pipe 3, an air inlet pipe 7, a purging pipe 8, a hydration reactor 9, a heat preservation jacket 10, a refrigerant pipe 11, a cold energy supply system 12, a hydrate slurry discharge pipe 13 and a cold air collecting pipe 14;
the hydration reactor 9 is provided with a heat preservation jacket 10, which is respectively connected with a liquid storage tank 1, a gas storage tank 5, a nitrogen bottle 6 and a cold energy supply system 12 through a liquid inlet pipe 3, an air inlet pipe 7, a purging pipe 8 and a refrigerant pipe 11, and is connected with a hydrate slurry external conveying treatment unit through a hydrate slurry external discharge pipe 13 and a cold air collecting pipe 14.
Further, the hydration reactor 9 includes a hydration reaction casing 16, a pressure sensor 17, a temperature sensor 18, a rotary wheel 19, a rotary casing 20, a liquid inlet 21, a first liquid discharge nozzle 22, a second liquid discharge nozzle 23, a third liquid discharge nozzle 24, a rotary rod 25, a spring 26, a connecting seat 27, a first pressure bearing plate 28, a second pressure bearing plate 29, a round table stop 30, a first stirring member 31, a second stirring member 32, a third stirring member 33, a fourth stirring member 34, a stirring umbrella 35, and an exhaust nozzle 36;
the top of the hydration reaction shell 16 is provided with a pressure sensor 17 and a temperature sensor 18, the bottom is provided with an exhaust nozzle 36, the rotary wheel 19 is arranged in the rotary shell 20, the rotary shell 20 is provided with a liquid inlet 21, a first liquid discharge nozzle 22, a second liquid discharge nozzle 23 and a third liquid discharge nozzle 24, the rotary rod 25 is provided with a round table stop block 30, an agitating umbrella 35 and a connecting seat 27, the connecting seat 27 is connected with a spring 26, the left side of the connecting seat 27 is provided with a first pressure bearing plate 28, the right side of the connecting seat 27 is provided with a second pressure bearing plate 29, a first agitating piece 31 and a second agitating piece 32 are arranged under the first pressure bearing plate 28, and a third agitating piece 33 and a fourth agitating piece 34 are arranged under the second pressure bearing plate 29;
further, the included angles between the liquid inlet 21 and the first, second and third liquid discharge nozzles 22, 23, 24 are 45 °, 90 °, 135 °, respectively.
Further, the first liquid discharge nozzle 22, the second liquid discharge nozzle 23 and the third liquid discharge nozzle 24 have the same nozzle shape, 7 small holes with the diameter of 10-20 mm are distributed in the center of the nozzle, and a plurality of small holes with the diameter of 0.5-1 mm are distributed around the small holes.
Further, the first bearing plate 28 and the second bearing plate 29 are two fan-shaped bearing plates with identical shapes, the central angle is 15 degrees to 50 degrees, and the radius is 0.5 to 0.8 times of the radius of the hydration reactor.
Further, the first stirring member 31, the second stirring member 32, the third stirring member 33 and the fourth stirring member 34 are four stirring bars with the same shape and different lengths, and the sum of the lengths of the first stirring member 31 and the second stirring member 32 is equal to the sum of the lengths of the third stirring member 33 and the fourth stirring member 34.
Further, the wall surface of the stirring umbrella 35 is provided with 4 to 8 rectangular through holes 37, and the included angle between the rectangular through holes and the horizontal direction is 25 to 45 degrees.
Further, the exhaust unit comprises an agitating umbrella 35 and an exhaust nozzle 36, wherein the exhaust nozzle 36 is arranged below the agitating umbrella 35.
Further, a method for rapidly synthesizing the hydrate comprises the following steps of;
s1, initial preparation
The valve of the purging pipe 8 is opened, the nitrogen bottle 6 is used for purging the hydration reactor 9, internal air is discharged, the valve of the purging pipe 8 is closed after purging is finished, then the valve of the refrigerant pipe 11 is opened, and the refrigerant flows in the refrigerant pipe 11 to provide cold for the hydration reactor 9;
s2, hydrate synthesis
Opening a valve of an air inlet pipe 7, enabling natural gas in an air storage tank 5 to enter a hydration reactor 9, opening a valve of a liquid inlet pipe 3 when the pressure of the hydration reactor 9 reaches a set value, pressurizing water in a liquid storage tank 1 by a water delivery pump 2, enabling the water to enter the hydration reactor 9 for hydration reaction, and adopting a circumferential and axial self-rotation stirring method for irregular stirring to accelerate the synthesis of natural gas hydrate;
s3, discharging hydrate slurry
The water level exceeds the hydrate slurry outlet, the hydrate slurry enters the hydrate slurry outward-conveying treatment unit 15 through the hydrate slurry outward-conveying pipe 13, the gas of the hydrate slurry outward-conveying treatment unit 15 returns to the hydration reactor 9 through the cold gas collecting pipe 14, and the liquid enters the liquid storage tank 1 through the liquid return pipe 4.
Further, the circumferential and axial self-rotation stirring method in the step S2 comprises the following steps of;
k1, in the circumferential self-rotation system, high-pressure water pushes a rotating wheel 19 in a rotating shell 20 to rotate, the rotating wheel 19 drives a rotating rod 25 to rotate, a first bearing plate 28, a second bearing plate 29, a first stirring piece 31, a second stirring piece 32, a third stirring piece 33 and a fourth stirring piece 34 rotate, and a stirring unit performs circumferential stirring on a hydration reaction system;
k2, in the axial self-rotation system, high-pressure water is sprayed and flows out in a water column at the centers of the first liquid discharge spray head 22, the second liquid discharge spray head 23 and the third liquid discharge spray head 24, mist spray is formed around the spray heads and flows out, the first pressure bearing plate 28 and the second pressure bearing plate 29 drive the first stirring piece 31, the second stirring piece 32, the third stirring piece 33 and the fourth stirring piece 34 to move downwards under the impact of water flow, and simultaneously, the stirring unit moves upwards under the action of spring tension and axially stirs the hydration reaction system.
The beneficial effects of the invention are as follows:
(1) The invention mainly aims at the problems of high mechanical stirring energy consumption, low reaction rate and gas storage capacity, difficulty in realizing continuous industrial production and the like in a hydrate production process, designs a rapid hydrate synthesis device, and provides a novel hydrate synthesis method for realizing rapid, efficient and economic preparation of the hydrate.
(2) And designing a hydration reaction circumferential and axial self-rotation system, driving a hydration reaction stirring system to perform circumferential and axial stirring, enhancing irregular disturbance intensity of the hydration reaction system, and realizing rapid preparation of the natural gas hydrate.
(3) The stirring umbrella is designed, the installation position of the air inlet nozzle is changed, and the continuous rotation of the stirring umbrella is used to reduce the aggregation rate of gas at the air inlet nozzle and the size of bubbles in the hydration reaction system, so as to accelerate the formation rate of the hydration reaction.
Drawings
FIG. 1 is a schematic view of an apparatus for synthesizing a hydrate in an embodiment of the present invention.
FIG. 2 is a flow chart of a process for synthesizing a hydrate in an embodiment of the invention.
FIG. 3 is a schematic diagram of the structure of a hydration reactor in accordance with an embodiment of the present invention.
Fig. 4 is a top view of a liquid discharge unit in an embodiment of the invention.
Fig. 5 is a three-dimensional perspective view of a liquid discharge unit in an embodiment of the present invention.
Fig. 6 is a schematic view of a liquid discharge head according to an embodiment of the present invention.
Fig. 7 is a schematic structural view of a bearing plate according to an embodiment of the present invention.
Fig. 8 is a top view of a bearing plate in an embodiment of the invention.
Fig. 9 is a cross-sectional view of a bearing plate in an embodiment of the invention.
Fig. 10 is a schematic view of the structure of an exhaust unit in the embodiment of the present invention.
Fig. 11 is a cross-sectional view of an exhaust unit in an embodiment of the invention.
FIG. 12 is a schematic view of an exhaust nozzle in an embodiment of the present invention.
Detailed Description
The following description of specific embodiments of the invention is provided in connection with the accompanying drawings to provide a better understanding of the invention.
Examples
In this embodiment, fig. 1 is a schematic diagram of a device for synthesizing a hydrate according to an embodiment of the present invention, and fig. 2 is a flow chart of a process for synthesizing a hydrate according to an embodiment of the present invention. The rapid hydrate synthesis device comprises a liquid inlet pipe 3, an air inlet pipe 7, a purging pipe 8, a hydration reactor 9, a heat preservation jacket 10, a refrigerant pipe 11, a cold energy supply system 12, a hydrate slurry discharge pipe 13 and a cold air collecting pipe 14;
the liquid storage tank 1 in be equipped with water pump 2, be connected with hydration reactor 9 through feed liquor pipe 3, be connected with hydrate thick liquid outward transport processing unit 15 through return liquor pipe 4, gas holder 5, nitrogen bottle 6 be connected with hydration reactor 9 through intake pipe 7, purge pipe 8 respectively, hydration reactor 9 be equipped with heat preservation jacket 10, be connected with cold energy supply system 12 through refrigerant pipe 11, be connected with hydrate thick liquid outward transport processing unit 15 through hydrate thick liquid outer calandria 13, cold air collecting pipe 14.
The natural gas and water realize the rapid synthesis of the hydrate through the following steps:
s1, initial preparation
The valve of the purging pipe 8 is opened, the nitrogen bottle 6 is used for purging the hydration reactor 9, internal air is discharged, the valve of the purging pipe 8 is closed after purging is finished, then the valve of the refrigerant pipe 11 is opened, and the refrigerant flows in the refrigerant pipe 11 to provide cold for the hydration reactor 9;
s2, hydrate synthesis
Opening a valve of an air inlet pipe 7, enabling natural gas in an air storage tank 5 to enter a hydration reactor 9, opening a valve of a liquid inlet pipe 3 when the pressure of the hydration reactor 9 reaches a set value, pressurizing water in a liquid storage tank 1 by a water delivery pump 2, enabling the water to enter the hydration reactor 9 for hydration reaction, and adopting a circumferential and axial self-rotation stirring method for irregular stirring to accelerate the synthesis of natural gas hydrate;
s3, discharging hydrate slurry
The water level exceeds the hydrate slurry outlet, the hydrate slurry enters the hydrate slurry outward-conveying treatment unit 15 through the hydrate slurry outward-conveying pipe 13, the gas of the hydrate slurry outward-conveying treatment unit 15 returns to the hydration reactor 9 through the cold gas collecting pipe 14, and the liquid enters the liquid storage tank 1 through the liquid return pipe 4.
Fig. 3 is a schematic structural view of a hydration reactor according to an embodiment of the present invention, and fig. 4 is a plan view of a liquid discharge unit according to an embodiment of the present invention. As shown in fig. 3 and 4, the hydration reactor 9 includes a hydration reaction casing 16, a pressure sensor 17, a temperature sensor 18, a rotary wheel 19, a rotary casing 20, a liquid inlet 21, a first liquid discharge nozzle 22, a second liquid discharge nozzle 23, a third liquid discharge nozzle 24, a rotary rod 25, a spring 26, a connection base 27, a first pressure receiving plate 28, a second pressure receiving plate 29, a round table stopper 30, a first stirring member 31, a second stirring member 32, a third stirring member 33, a fourth stirring member 34, a stirring umbrella 35, and an exhaust nozzle 36;
the hydration reaction casing 16 top be equipped with pressure sensor 17, temperature sensor 18, the bottom is equipped with exhaust shower nozzle 36, rotatory wheel 19 install in rotatory casing 20, rotatory casing 20 be equipped with inlet 21, first flowing back shower nozzle 22, second flowing back shower nozzle 23, third flowing back shower nozzle 24, rotary rod 25 on be equipped with round platform dog 30, stirring umbrella 35, connecting seat 27 be connected with spring 26, the left side of connecting seat 27 establishes first bearing plate 28, the right side of connecting seat 27 establishes second bearing plate 29, first bearing plate 28 under be equipped with first stirring piece 31, second stirring piece 32, second bearing plate 29 under be equipped with third stirring piece 33, fourth stirring piece 34.
Fig. 5 is a three-dimensional perspective view of a liquid discharge unit in an embodiment of the present invention. As shown in fig. 4 and 5, the first liquid discharge nozzle 22, the second liquid discharge nozzle 23 and the third liquid discharge nozzle 24 have the same nozzle shape, and the included angles between the liquid inlet 21 and the first liquid discharge nozzle 22, the second liquid discharge nozzle 23 and the third liquid discharge nozzle 24 are 45 °, 90 ° and 135 °, respectively.
FIG. 6 is a schematic diagram of a structure of a liquid discharge nozzle in an embodiment of the present invention, wherein 7 small holes with diameters of 10-20 mm are distributed in the center of the nozzle of the liquid discharge nozzle, and a plurality of holes with diameters of 0.5-1 mm are distributed around the nozzle.
Fig. 7 is a schematic structural view of a bearing plate according to an embodiment of the present invention. The first stirring piece 31, the second stirring piece 32, the third stirring piece 33 and the fourth stirring piece 34 are four stirring rods with the same shape and different lengths, and the sum of the lengths of the first stirring piece 31 and the second stirring piece 32 is equal to the sum of the lengths of the third stirring piece 33 and the fourth stirring piece 34.
Fig. 8 is a top view of a bearing plate in an embodiment of the invention. The first bearing plate 28 and the second bearing plate 29 are two fan-shaped bearing plates with identical shapes, the central angle is 15-50 degrees, and the radius is 0.5-0.8 times of the radius of the hydration reactor.
Fig. 9 is a cross-sectional view of the bearing plate in an embodiment of the present invention, with the boss stop 30 being the lowest position of the downward movement of the bearing plate.
In the circumferential self-rotation system, high-pressure water pushes the rotating wheel 19 in the rotating housing 20 to rotate, the rotating wheel 19 drives the rotating rod 25 to rotate, the first bearing plate 28, the second bearing plate 29, the first stirring piece 31, the second stirring piece 32, the third stirring piece 33 and the fourth stirring piece 34 rotate, and the stirring unit performs circumferential stirring on the hydration reaction system.
In the axial self-rotation system, high-pressure water is sprayed and flows out in a water column at the centers of the first liquid discharge spray head 22, the second liquid discharge spray head 23 and the third liquid discharge spray head 24, mist spray is formed around the spray heads and flows out, the first pressure bearing plate 28 and the second pressure bearing plate 29 drive the first stirring piece 31, the second stirring piece 32, the third stirring piece 33 and the fourth stirring piece 34 to move downwards under the impact of water flow, and simultaneously, the stirring units move upwards under the action of spring tension, and the stirring units stir axially in the hydration reaction system. Along with the hydration reaction, the stirring system simultaneously performs circumferential and axial stirring, so that the stirring intensity of the hydration reaction system is greatly enhanced, and continuous and irregular stirring is realized.
Fig. 10 is a schematic structural view of an exhaust unit according to an embodiment of the present invention, fig. 11 is a cross-sectional view of the exhaust unit according to an embodiment of the present invention, and fig. 12 is a schematic structural view of an exhaust nozzle according to an embodiment of the present invention. The exhaust unit comprises an agitating umbrella 35 and an exhaust nozzle 36, wherein 4-8 rectangular through holes 37 are formed in the wall surface of the agitating umbrella 35, and the included angle between the agitating umbrella and the horizontal direction is 25-45 degrees. The upper part of the exhaust nozzle 36 is provided with a plurality of small holes which are arranged below the stirring umbrella 35. The stirring umbrella continuously rotates, the aggregation rate liquid of gas at the exhaust nozzle is greatly reduced, the size of bubbles in a hydration reaction system is greatly reduced, the contact area of gas and liquid is larger, and hydrate is easier to generate.
While the foregoing is directed to the preferred embodiments of the present invention, it will be appreciated by those skilled in the art that changes and modifications may be made without departing from the principles of the invention, such changes and modifications are also intended to be within the scope of the invention.
Claims (6)
1. A rapid hydrate synthesis device is characterized in that: the device comprises a liquid inlet pipe (3), an air inlet pipe (7), a purging pipe (8), a hydration reactor (9), a heat preservation jacket (10), a refrigerant pipe (11), a cold energy supply system (12), a hydrate slurry discharge pipe (13) and a cold air collecting pipe (14);
the hydration reactor (9) is provided with a heat preservation jacket (10), and is respectively connected with the liquid storage tank (1), the gas storage tank (5), the nitrogen cylinder (6) and the cold energy supply system (12) through the liquid inlet pipe (3), the gas inlet pipe (7), the purge pipe (8) and the cold energy pipe (11), and is connected with the hydrate slurry external transmission treatment unit through the hydrate slurry external discharge pipe (13) and the cold energy collection pipe (14);
the hydration reactor (9) comprises a hydration reaction shell (16), a pressure sensor (17), a temperature sensor (18), a rotary wheel (19), a rotary shell (20), a liquid inlet (21), a first liquid discharge nozzle (22), a second liquid discharge nozzle (23), a third liquid discharge nozzle (24), a rotary rod (25), a spring (26), a connecting seat (27), a first pressure bearing plate (28), a second pressure bearing plate (29), a round table stop block (30), a first stirring piece (31), a second stirring piece (32), a third stirring piece (33), a fourth stirring piece (34), a stirring umbrella (35) and an exhaust nozzle (36);
the hydration reaction device is characterized in that a pressure sensor (17) and a temperature sensor (18) are arranged at the top of a hydration reaction shell (16), an exhaust nozzle (36) is arranged at the bottom of the hydration reaction shell, a rotary wheel (19) is arranged in the rotary shell (20), a liquid inlet (21), a first liquid discharge nozzle (22), a second liquid discharge nozzle (23) and a third liquid discharge nozzle (24) are arranged on the rotary shell (20), a round table stop block (30), an agitating umbrella (35) and a connecting seat (27) are arranged on the rotary rod (25), the connecting seat (27) is connected with a spring (26), a first bearing plate (28) is arranged at the left side of the connecting seat (27), a second bearing plate (29) is arranged at the right side of the connecting seat (27), a first agitating piece (31) and a second agitating piece (32) are arranged under the first bearing plate (28), and a third agitating piece (33) and a fourth agitating piece (34) are arranged under the second bearing plate (29);
the exhaust unit comprises an agitating umbrella (35) and an exhaust nozzle (36), and the exhaust nozzle (36) is arranged below the agitating umbrella (35);
the synthesis method of the hydrate rapid synthesis device comprises the following steps:
s1, initial preparation
Opening a valve of a purging pipe (8), purging the hydration reactor (9) by using a nitrogen bottle (6), removing internal air, closing the valve of the purging pipe (8) after purging, and then opening a valve of a refrigerant pipe (11), wherein the refrigerant flows in the refrigerant pipe (11) to provide cold energy for the hydration reactor (9);
s2, hydrate synthesis
Opening a valve of an air inlet pipe (7), enabling natural gas in an air storage tank (5) to enter a hydration reactor (9), opening a valve of a liquid inlet pipe (3) when the pressure of the hydration reactor (9) reaches a set value, pressurizing water in a liquid storage tank (1) through a water delivery pump (2), enabling the water to enter the hydration reactor (9) for hydration reaction, and adopting a circumferential and axial self-rotation stirring method for irregular stirring to accelerate the synthesis of natural gas hydrate;
s3, discharging hydrate slurry
The water level exceeds the hydrate slurry outlet, the hydrate slurry enters a hydrate slurry outward conveying treatment unit (15) through a hydrate slurry outward discharging pipe (13), the gas of the hydrate slurry outward conveying treatment unit (15) returns to the hydration reactor (9) through a cold gas collecting pipe (14), and the liquid enters a liquid storage tank (1) through a liquid return pipe (4);
the circumferential and axial self-rotation stirring method in the step S2 comprises the following steps:
k1, in a circumferential self-rotating system, high-pressure water pushes a rotating wheel (19) in a rotating shell (20) to rotate, the rotating wheel (19) drives a rotating rod (25) to rotate, a first bearing plate (28), a second bearing plate (29), a first stirring piece (31), a second stirring piece (32), a third stirring piece (33) and a fourth stirring piece (34) rotate, and a stirring unit performs circumferential stirring in a hydration reaction system;
k2, in the axial autogyration system, high-pressure water is the water column injection and flows in the center department of first flowing back shower nozzle (22), second flowing back shower nozzle (23), third flowing back shower nozzle (24), and the shower nozzle is vaporific injection and flows all around, and first bearing plate (28), second bearing plate (29) drive first stirring piece (31), second stirring piece (32), third stirring piece (33), fourth stirring piece (34) down move under the rivers impact, and upward movement is carried out under the spring pulling force effect simultaneously, agitates the unit and carries out axial stirring at the hydration reaction system.
2. The rapid hydrate synthesis apparatus according to claim 1, wherein: the included angles of the liquid inlet (21), the first liquid discharge spray nozzle (22), the second liquid discharge spray nozzle (23) and the third liquid discharge spray nozzle (24) are 45 degrees, 90 degrees and 135 degrees respectively.
3. The rapid hydrate synthesis apparatus according to claim 1, wherein: the first liquid draining spray nozzle (22), the second liquid draining spray nozzle (23) and the third liquid draining spray nozzle (24) have the same nozzle shape, 7 small holes with the diameter of 10-20 mm are distributed in the center of the nozzle, and a plurality of holes with the diameter of 0.5-1 mm are distributed around the nozzle.
4. The rapid hydrate synthesis apparatus according to claim 1, wherein: the first bearing plate (28) and the second bearing plate (29) are two fan-shaped bearing plates with identical shapes, the central angle is 15-50 degrees, and the radius is 0.5-0.8 times of the radius of the hydration reactor.
5. The rapid hydrate synthesis apparatus according to claim 1, wherein: the first stirring piece (31), the second stirring piece (32), the third stirring piece (33) and the fourth stirring piece (34) are four stirring rods with the same shape and different lengths, and the sum of the lengths of the first stirring piece (31) and the second stirring piece (32) is equal to the sum of the lengths of the third stirring piece (33) and the fourth stirring piece (34).
6. The rapid hydrate synthesis apparatus according to claim 1, wherein: the wall surface of the stirring umbrella (35) is provided with 4-8 rectangular through holes (37), and the included angle between the wall surface and the horizontal direction is 25-45 degrees.
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| CN110305706B (en) * | 2019-07-08 | 2020-11-10 | 西南石油大学 | Novel device and method for preparing rock-forming natural gas hydrate |
| CN110387276B (en) * | 2019-08-20 | 2023-10-27 | 中国石油化工股份有限公司 | Quick synthesis device and method for jet shale gas hydrate slurry |
| CN111909742B (en) * | 2020-06-18 | 2022-04-22 | 华南理工大学 | Boric acid solution gas hydrate accelerant and application thereof in preparation of gas hydrate with high gas storage density |
| CN114659312B (en) * | 2022-03-30 | 2024-04-19 | 北京工业大学 | Method for rapidly preparing carbon dioxide hydrate slurry for cold accumulation |
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