CN109097120B - Static strengthening rapid continuous generation device and method for natural gas hydrate - Google Patents
Static strengthening rapid continuous generation device and method for natural gas hydrate Download PDFInfo
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- CN109097120B CN109097120B CN201810977436.4A CN201810977436A CN109097120B CN 109097120 B CN109097120 B CN 109097120B CN 201810977436 A CN201810977436 A CN 201810977436A CN 109097120 B CN109097120 B CN 109097120B
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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
- C10L3/00—Gaseous fuels; Natural gas; Synthetic natural gas obtained by processes not covered by subclass C10G, C10K; Liquefied petroleum gas
- C10L3/06—Natural gas; Synthetic natural gas obtained by processes not covered by C10G, C10K3/02 or C10K3/04
- C10L3/10—Working-up natural gas or synthetic natural gas
- C10L3/108—Production of gas hydrates
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J3/00—Processes of utilising sub-atmospheric or super-atmospheric pressure to effect chemical or physical change of matter; Apparatus therefor
- B01J3/002—Component parts of these vessels not mentioned in B01J3/004, B01J3/006, B01J3/02 - B01J3/08; Measures taken in conjunction with the process to be carried out, e.g. safety measures
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J3/00—Processes of utilising sub-atmospheric or super-atmospheric pressure to effect chemical or physical change of matter; Apparatus therefor
- B01J3/04—Pressure vessels, e.g. autoclaves
Abstract
The invention discloses a device and a method for static-state-enhanced rapid and continuous generation of natural gas hydrate. The device comprises a feed liquid tank, a reaction kettle, a refrigerating system of the reaction kettle, a temperature control system, a pressure control system, a natural gas buffer tank, a compressor, a hydrate storage tank, and connecting pipelines and valves between the natural gas buffer tank and the compressor. The method comprises the steps of enabling water and an accelerant to enter a material liquid box to be mixed to prepare an aqueous solution, enabling the aqueous solution to enter from the top of a reaction kettle, enabling the liquid to flow down along the inner wall of the kettle in a film shape under the action of a liquid uniform distributor in the kettle, exchanging heat with the inner wall of the kettle in the flowing process to enable a liquid film to be in gradient distribution along the axial temperature of the reaction kettle, introducing natural gas from the bottom of the reaction kettle to be in countercurrent contact with the liquid film to form a hydrate film, enabling the hydrate film to be separated from the kettle wall under the action of a scraper in the reaction kettle, and enabling the hydrate film and the solution to. The invention has the advantages of simple preparation method and device, quick generation of natural gas hydrate, high heat transfer efficiency and low energy consumption.
Description
Technical Field
The invention belongs to the field of petroleum engineering, and particularly relates to a static strengthening rapid continuous generation device and method for natural gas hydrate.
Technical Field
Gas hydrates are ice-like crystals consisting of water-hydrogen bonds forming cages surrounding gas molecules, such as methane, carbon dioxide or other hydrocarbons. The natural gas can be stored by generating the gas hydrate by the natural gas and water or solution, the gas storage density of the natural gas hydrate is high, the natural gas hydrate of unit volume can store 180 volumes of natural gas, the generation condition of the natural gas hydrate is simple, and the temperature and the pressure only need to be controlled under the hydrate generation condition. Therefore, the method for storing and transporting the natural gas by using the hydrate has extremely high economic value and application potential.
The natural gas hydrate generation process is a heat release process, if the heat released by the generation of the hydrate cannot be timely and effectively removed, the local temperature can be rapidly increased, the further generation of the hydrate is hindered, and the gas storage capacity is reduced. In addition, hydrates generally form at the gas-liquid phase interface, forming a thin, porous crystalline film that prevents the guest from coming into direct contact with water, thus preventing further hydrate growth.
Based on the problems, in order to solve the problem that heat cannot be removed in time in the hydrate generation process, the invention provides a device and a method for statically strengthening, rapidly and continuously generating natural gas hydrate, which can rapidly and efficiently remove heat generated in the hydrate generation process, realize continuous and efficient generation of the natural gas hydrate, and store and transport the generated hydrate by adopting a separable natural gas hydrate storage tank.
Disclosure of Invention
The invention aims to provide a static strengthening rapid continuous generation device for natural gas hydrate, and further aims to provide a using method of the device. The method and the device have the advantages of simple operation, low production cost and high efficiency.
The technical scheme of the invention is as follows.
A natural gas hydrate static strengthening rapid continuous generation device comprises a feed liquid tank inlet valve, a feed liquid tank outlet valve, a gas buffer tank inlet valve, a natural gas buffer tank, a first compressor outlet pressure regulating valve, a pressure control system, a reaction kettle, a temperature control system, a refrigeration system, a first three-way valve, a first natural gas hydrate storage tank, a second compressor outlet pressure regulating valve and a second three-way valve;
the inlet valve of the feed liquid tank is sequentially connected with the feed liquid tank, the outlet valve of the feed liquid tank and the reaction kettle, and the reaction kettle is also connected with a refrigerating system and a temperature control system;
the inlet valve of the natural gas buffer tank is connected with the natural gas buffer tank, the natural gas buffer tank is sequentially connected with a first compressor and a first compressor outlet pressure regulating valve, the first compressor outlet pressure regulating valve is respectively connected with a pressure control system and a reaction kettle, the bottom of the reaction kettle is connected with a first three-way valve, and the first three-way valve is respectively connected with a first natural gas hydrate storage tank and a second natural gas hydrate storage tank;
the natural gas buffer tank is also connected with a second compressor, the second compressor is sequentially connected with a second compressor outlet pressure regulating valve and a second three-way valve, the second three-way valve is respectively connected with a first natural gas hydrate storage tank and a second natural gas hydrate storage tank, and the pressure control system is connected with the second compressor outlet pressure regulating valve;
there are doctor-bar, liquid evenly distributed ware, inlet, air inlet and hydrate thick liquid export in the reation kettle, and reation kettle has a plurality of refrigeration semiconductors outward, the doctor-bar is located inside reation kettle, laminates with the reation kettle inner wall, the inlet is located the reation kettle top, liquid evenly distributed ware is located reation kettle upper portion, inlet below, the air inlet is located the reation kettle below, the export of hydrate thick liquid is located the reation kettle bottom, the refrigeration semiconductor encircles in the reation kettle outside.
Further, the scraping mode of the scraping blade in the reaction kettle comprises the following steps: natural gas pushing, motor belt transmission or motor screw driving; the number of the scraping pieces is more than one.
Further, the reaction kettle is of a vertical cylindrical type, and the height-diameter ratio of the reaction kettle is 1: 4~10, refrigerating system is for encircling a plurality of refrigeration semiconductors in the reation kettle outside and burying a plurality of temperature monitor in the cauldron wall, under temperature control system's effect, is gradient distribution along reation kettle axial temperature, from top to bottom, reduces in proper order, and the temperature range is: 271K to 261K.
Further, the temperature monitor detects the temperature of the inner wall of the reaction kettle, feeds the temperature back to the temperature control system, and controls and adjusts the refrigeration semiconductor; the pressure control system detects the pressure in the reaction kettle and the first natural gas hydrate storage tank or the second natural gas hydrate storage tank and controls the outlet pressure regulating valve of the first compressor and the outlet pressure regulating valve of the second compressor.
Furthermore, the first three-way valve and the second three-way valve are connected through switchable pipelines, when the first natural gas hydrate storage tank is full, the reaction kettle and the second compressor are respectively connected with the second natural gas hydrate storage tank through the switchable pipelines, when the first natural gas hydrate storage tank is detached and replaced, the second natural gas hydrate storage tank is connected, continuous production is guaranteed, and the subsequent production process is the same as the above.
Further, the temperature monitor in the temperature control system comprises a Pt100 thermal resistor, a K-type thermal resistor or a T-type thermal resistor, and the pressure control system detects the pressure through a pressure sensor.
A static strengthening rapid continuous generation method of natural gas hydrate is characterized in that a hydrate generation promoter and water are prepared into an aqueous solution, the aqueous solution enters a reaction kettle and flows down along the inner wall of the reaction kettle in a film shape, the temperature is reduced in a gradient manner in the flowing process, natural gas with the pressure of 2-8 MPa is introduced from the bottom of the reaction kettle and is in countercurrent contact with a liquid film, so that a hydrate film is formed, the natural gas is separated from the inner wall of the reaction kettle under the action of a scraper in the reaction kettle, and hydrate slurry formed by the natural gas and the solution flows into a hydrate.
A static strengthening rapid continuous generation method of natural gas hydrate comprises the following steps:
(1) feeding: starting a refrigeration system, performing gradient cooling on the reaction kettle through a plurality of refrigeration semiconductors surrounding the outer side of the reaction kettle, then starting a first compressor and a second compressor, pressurizing natural gas in a natural gas buffer tank and introducing the gas from the bottom of the reaction kettle, introducing the gas into a first natural gas hydrate storage tank, setting the pressure in the natural gas hydrate storage tank to be the same as the pressure of the reaction kettle, starting a liquid inlet pump, and introducing the liquid from the top of the reaction kettle into a solution tank, wherein the solution in a solution tank uniformly flows along the inner wall of the reaction kettle in a film shape under the action of a liquid uniform distributor;
(2) reaction: keeping the absolute pressure in the reaction kettle at 2-8 MPa, keeping the temperature gradient at 271K-261K, allowing natural gas and water to react to generate a natural gas hydrate film, separating the hydrate film from the wall surface under the action of a scraper in the kettle, forming hydrate slurry with unreacted solution, and allowing the hydrate slurry to enter a hydrate storage tank;
(3) separation: when the first natural gas hydrate storage tank is full, switching the first three-way valve and the second three-way valve to enable the second natural gas hydrate storage tank to be communicated with the reaction kettle and the second compressor, and disassembling and replacing the first natural gas hydrate storage tank; and when the second natural gas hydrate storage tank is full, switching the first three-way valve and the second three-way valve again to enable the replaced first natural gas hydrate storage tank to be communicated with the reaction kettle and the second compressor, and the subsequent production process is the same as the above.
In the method, the hydrate generation accelerant comprises more than one of sodium dodecyl sulfate, sodium dodecyl benzene sulfonate, leucine, tetrabutylammonium bromide, tetrabutylammonium fluoride, tetrabutylammonium chloride, tetrabutylphosphonium bromide, methyl tert-butyl ether, methyl cyclohexane, cyclopentane, Tween-80, dodecyl trimethyl ammonium chloride, tert-butyl alcohol and ionic liquid.
Furthermore, the reaction temperature gradient is 271K-261K, and the absolute pressure in the reaction is 2-8 MPa.
Further, the heat exchange mode of the reaction kettle includes but is not limited to refrigeration semiconductors, heat exchange coils and the like.
In the method, after entering from the top of the reaction kettle, liquid flows along the inner wall of the reaction kettle in a membrane shape through the liquid uniform distributor and reacts with natural gas entering from the lower part of the reaction kettle to generate hydrate, the hydrate attached to the inner wall of the reaction kettle is scraped by the scraper to form hydrate slurry with unreacted liquid, and the hydrate slurry enters the natural gas hydrate storage tank through a pipeline at the bottom of the reaction kettle.
Compared with the prior art, the invention has the following advantages:
1. the inner wall of the hydration reaction kettle adopts a gradient cooling mode, and the liquid is subjected to gradient cooling in the process of flowing down along the inner wall of the reaction kettle in a membrane shape, so that the heat released by water and reaction can be quickly removed, and the temperature control is accurate and efficient.
2. According to the invention, the liquid phase in the hydration reaction kettle is distributed along the inner wall of the reaction kettle in a film shape, the dynamic strengthening can be carried out on the hydrate generation process on the basis of adding the hydrate generation accelerant, and the thermodynamic strengthening and the dynamic strengthening of the hydrate generation are organically combined together, so that the conditions required by the hydrate generation are reduced, the gas-liquid contact area is large, the removal of hydration heat is facilitated, the rapid and efficient proceeding of the hydration reaction is facilitated, the hydration reaction rate is controlled only by changing the liquid inlet rate, the operation method is simpler, and the hydration reaction is easier to control.
3. According to the invention, the plurality of scraping blades are designed in the reaction kettle, so that the hydrate adhered to the inner wall of the reaction kettle can be scraped off, and the hydrate slurry is formed together with unreacted liquid and enters the detachable natural gas hydrate storage tank, no additional equipment is needed for conveying the hydrate, the generation and storage of the hydrate are carried out independently, the hydrate production can be carried out stably and continuously, the process is simple, and the operation is environment-friendly and safe.
Drawings
FIG. 1 is a schematic view of a static enhanced rapid continuous generation apparatus for natural gas hydrate according to the present invention.
FIG. 2 is a schematic view of the inside structure of a reaction vessel.
The various components in the figure are as follows: the device comprises a feed liquid tank inlet valve 1, a feed liquid tank 2, a feed liquid tank outlet valve 3, a gas buffer tank inlet valve 4, a natural gas buffer tank 5, a first compressor 6, a first compressor outlet pressure regulating valve 7, a pressure control system 8, a reaction kettle 9, a temperature control system 10, a refrigeration system 11, a first three-way valve 12, a first natural gas hydrate storage tank 13, a second natural gas hydrate storage tank 14, a second compressor 15, a second compressor outlet pressure regulating valve 16, a second three-way valve 17, a scraping blade 91, a liquid uniform distributor 92, a refrigeration semiconductor 93, a liquid inlet 94, an air inlet 95 and a hydrate slurry outlet 96.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1-2, a static-enhanced rapid continuous generation device for natural gas hydrates comprises a feed liquid tank inlet valve 1, a feed liquid tank 2, a feed liquid tank outlet valve 3, a gas buffer tank inlet valve 4, a natural gas buffer tank 5, a first compressor 6, a first compressor outlet pressure regulating valve 7, a pressure control system 8, a reaction kettle 9, a temperature control system 10, a refrigeration system 11, a first three-way valve 12, a first natural gas hydrate storage tank 13, a second natural gas hydrate storage tank 14, a second compressor 15, a second compressor outlet pressure regulating valve 16 and a second three-way valve 17; the feed liquid tank inlet valve 1 is sequentially connected with a feed liquid tank 2, a feed liquid tank outlet valve 3 and a reaction kettle 9, and the reaction kettle 9 is further connected with a refrigerating system 11 and a temperature control system 10; the inlet valve 4 of the natural gas buffer tank is connected with the natural gas buffer tank 5, the natural gas buffer tank 5 is sequentially connected with a first compressor 6 and a first compressor outlet pressure regulating valve 7, the first compressor outlet pressure regulating valve 7 is respectively connected with a pressure control system 8 and a reaction kettle 9, the bottom of the reaction kettle 9 is connected with a first three-way valve 12, and the first three-way valve 12 is respectively connected with a first natural gas hydrate storage tank 13 and a second natural gas hydrate storage tank 14; the natural gas buffer tank 5 is further connected with a second compressor 15, the second compressor 15 is sequentially connected with a second compressor outlet pressure regulating valve 16 and a second three-way valve 17, the second three-way valve 17 is respectively connected with a first natural gas hydrate storage tank 13 and a second natural gas hydrate storage tank 14, and the pressure control system 8 is connected with the second compressor outlet pressure regulating valve 16; there are doctor-bar 91, liquid evenly distributed ware 92, inlet 94, air inlet 95 and hydrate thick liquid export 96 in the reation kettle, and there are a plurality of refrigeration semiconductors 93 outside the reation kettle, doctor-bar 91 is located inside the reation kettle, laminates with the reation kettle inner wall, inlet 94 is located the reation kettle top, liquid evenly distributed ware 92 is located reation kettle upper portion, inlet below, air inlet 95 is located the reation kettle below, hydrate thick liquid export 96 is located the reation kettle bottom, refrigeration semiconductor 93 encircles in the reation kettle outside.
The scraping mode of the scraping blade in the reaction kettle comprises the following steps: natural gas pushing, motor belt transmission or motor screw driving; taking natural gas propulsion as an example: when the natural gas and the liquid phase react to generate the hydrate, the gas is consumed, so that the pressure in the reaction kettle is reduced, and the scraper blade axially moves along the inner wall of the reaction kettle under the pushing of the pressure difference to scrape the hydrate film on the inner wall of the reaction kettle.
The number of the scraping pieces is more than one. The reaction kettle 9 is of a vertical cylindrical shape, and the height-diameter ratio of the reaction kettle is 1: 4~10, refrigerating system 11 is for encircling a plurality of refrigeration semiconductors 93 in the 9 outsides of reation kettle and burying a plurality of temperature monitor in the cauldron wall, under temperature control system's effect, is gradient distribution along reation kettle axial temperature, from top to bottom, reduces in proper order, and the temperature range is: 271K to 261K. The temperature monitor detects the temperature of the inner wall of the reaction kettle 9, feeds the temperature back to the temperature control system 10, and controls and adjusts the refrigeration semiconductor 93; the pressure control system 8 detects the pressure in the reaction kettle 9 and the first natural gas hydrate storage tank 13 or the second natural gas hydrate storage tank 14, and controls the first compressor outlet pressure regulating valve 7 and the second compressor outlet pressure regulating valve 16. The first three-way valve 12 and the second three-way valve 17 are both connected by switchable pipelines, when the first natural gas hydrate storage tank 13 is full, the reaction kettle 9 and the second compressor 15 are respectively connected with the second natural gas hydrate storage tank 14 by the switchable pipelines, and when the first natural gas hydrate storage tank 13 is detached and replaced, the second natural gas hydrate storage tank 14 is connected, so that continuous production is ensured, and the subsequent production process is the same as the above. The temperature monitor in the temperature control system 10 includes a Pt100 thermal resistor, a K-type thermal resistor, or a T-type thermal resistor, and the pressure control system detects the pressure by a pressure sensor.
The using process of the invention is as follows:
1) feeding: starting a refrigerating system, carrying out gradient cooling on the reaction kettle through a plurality of refrigerating semiconductors surrounding the outer side of the reaction kettle, then starting a first compressor and a second compressor, pressurizing natural gas in a buffer tank and feeding the gas from the bottom of the reaction kettle, feeding the gas into a first natural gas hydrate storage tank, setting the pressure in the natural gas hydrate storage tank to be the same as the pressure in the reaction kettle, starting a liquid inlet pump, feeding the solution in a feed liquid tank from the top of the reaction kettle, and enabling the solution to uniformly flow in a film shape along the inner wall of the reaction kettle under the action of a liquid uniform distributor.
(2) Reaction: keeping the absolute pressure in the reaction kettle at 2-8 MPa, keeping the temperature gradient at 271K-261K, allowing natural gas and water to react to generate a natural gas hydrate film, separating the hydrate film from the wall surface under the action of a scraper in the kettle, forming hydrate slurry with unreacted solution, and allowing the hydrate slurry to enter a hydrate storage tank;
(3) separation: when the first natural gas hydrate storage tank is full, switching the first three-way valve and the second three-way valve to enable the second natural gas hydrate storage tank to be communicated with the reaction kettle and the second compressor, and disassembling and replacing the first natural gas hydrate storage tank; and when the second natural gas hydrate storage tank is full, switching the first three-way valve and the second three-way valve again to communicate the replaced first natural gas hydrate storage tank with the reaction kettle and the second compressor, and the subsequent production process is the same as the above.
Claims (7)
1. A natural gas hydrate static strengthening rapid continuous generation device is characterized by comprising a feed liquid tank inlet valve (1), a feed liquid tank (2), a feed liquid tank outlet valve (3), a natural gas buffer tank inlet valve (4), a natural gas buffer tank (5), a first compressor (6), a first compressor outlet pressure regulating valve (7), a pressure control system (8), a reaction kettle (9), a temperature control system (10), a refrigeration system (11), a first three-way valve (12), a first natural gas hydrate storage tank (13), a second natural gas hydrate storage tank (14), a second compressor (15), a second compressor outlet pressure regulating valve (16) and a second three-way valve (17);
the feed liquid box inlet valve (1) is sequentially connected with a feed liquid box (2), a feed liquid box outlet valve (3) and a reaction kettle (9), and the reaction kettle (9) is also connected with a refrigeration system (11) and a temperature control system (10);
the natural gas buffer tank inlet valve (4) is connected with a natural gas buffer tank (5), the natural gas buffer tank (5) is sequentially connected with a first compressor (6) and a first compressor outlet pressure regulating valve (7), the first compressor outlet pressure regulating valve (7) is respectively connected with a pressure control system (8) and a reaction kettle (9), the bottom of the reaction kettle (9) is connected with a first three-way valve (12), and the first three-way valve (12) is respectively connected with a first natural gas hydrate storage tank (13) and a second natural gas hydrate storage tank (14);
the natural gas buffer tank (5) is further connected with a second compressor (15), the second compressor (15) is sequentially connected with a second compressor outlet pressure regulating valve (16) and a second three-way valve (17), the second three-way valve (17) is respectively connected with a first natural gas hydrate storage tank (13) and a second natural gas hydrate storage tank (14), and the pressure control system (8) is connected with the second compressor outlet pressure regulating valve (16);
there are a doctor-bar (91), liquid evenly distributed ware (92), inlet (94), air inlet (95) and hydrate thick liquid export (96) in the reation kettle, and reation kettle has a plurality of refrigeration semiconductors (93) outward, doctor-bar (91) are located inside the reation kettle, laminate with the reation kettle inner wall, inlet (94) are located the reation kettle top, liquid evenly distributed ware (92) are located reation kettle upper portion, the inlet below, air inlet (95) are located the reation kettle below, hydrate thick liquid export (96) are located the reation kettle bottom, refrigeration semiconductor (93) encircle in the reation kettle outside.
2. The device for statically and continuously strengthening and rapidly generating natural gas hydrate according to claim 1, wherein the scraping manner of the scraping blade in the reaction kettle comprises the following steps: natural gas pushing, motor belt transmission or motor screw driving; the number of the scraping pieces is more than one.
3. The static strengthening rapid continuous generation device for natural gas hydrate according to claim 1, characterized in that the reaction kettle (9) is of a vertical cylindrical shape, and the height-diameter ratio is 1: 4~10, refrigerating system (11) are for surrounding a plurality of refrigeration semiconductor (93) in reation kettle (9) outside and burying a plurality of temperature monitor in the cauldron wall, under temperature control system's effect, are gradient distribution along reation kettle axial temperature, from top to bottom, reduce in proper order, and the temperature range is: 271K to 261K.
4. The natural gas hydrate static strengthening rapid continuous generation device according to claim 1, wherein the temperature monitor detects the temperature of the inner wall of the reaction kettle (9), feeds the temperature back to the temperature control system (10), and controls and adjusts the refrigeration semiconductor (93); the pressure control system (8) detects the pressure in the reaction kettle (9) and the first natural gas hydrate storage tank (13) or the second natural gas hydrate storage tank (14), and controls the first compressor outlet pressure regulating valve (7) and the second compressor outlet pressure regulating valve (16).
5. The natural gas hydrate static strengthening rapid continuous generation device according to claim 1, wherein the first three-way valve (12) and the second three-way valve (17) are both connected by a switchable pipeline, when the first natural gas hydrate storage tank (13) is full, the switchable pipeline connects the reaction kettle (9) and the second compressor (15) with the second natural gas hydrate storage tank (14), when the first natural gas hydrate storage tank (13) is disassembled and replaced, the second natural gas hydrate storage tank (14) is connected to ensure continuous production, and the subsequent production process is the same as the above.
6. The static enhanced rapid continuous generation device of natural gas hydrate according to claim 1, characterized in that the temperature monitor in the temperature control system (10) comprises a Pt100 thermal resistor, a K-type thermal resistor or a T-type thermal resistor, and the pressure control system detects the pressure by a pressure sensor.
7. The method for static enhanced rapid and continuous generation of the natural gas hydrate by using the device as claimed in claim 1 is characterized in that a hydrate generation promoter and water are prepared into an aqueous solution, the aqueous solution enters a reaction kettle and flows down along the inner wall of the reaction kettle in a film shape, the temperature is reduced in a gradient manner in the flowing process, natural gas with 2-8 MPa is introduced from the bottom of the reaction kettle and is in countercurrent contact with a liquid film, so that a hydrate film is formed, and under the action of a scraper in the reaction kettle, the hydrate film is separated from the inner wall of the reaction kettle and forms hydrate slurry with the solution to flow into a hydrate storage tank;
the method comprises the following steps:
(1) feeding: starting a refrigeration system, performing gradient cooling on the reaction kettle through a plurality of refrigeration semiconductors surrounding the outer side of the reaction kettle, then starting a first compressor and a second compressor, pressurizing natural gas in a natural gas buffer tank and introducing the gas from the bottom of the reaction kettle, introducing the gas into a first natural gas hydrate storage tank, setting the pressure in the natural gas hydrate storage tank to be the same as the pressure of the reaction kettle, starting a liquid inlet pump, and introducing the liquid from the top of the reaction kettle into a solution tank, wherein the solution in a solution tank uniformly flows along the inner wall of the reaction kettle in a film shape under the action of a liquid uniform distributor;
(2) reaction: keeping the absolute pressure in the reaction kettle at 2-8 MPa, keeping the temperature gradient at 271K-261K, allowing natural gas and water to react to generate a natural gas hydrate film, separating the hydrate film from the wall surface under the action of a scraper in the kettle, forming hydrate slurry with unreacted solution, and allowing the hydrate slurry to enter a hydrate storage tank;
(3) separation: when the first natural gas hydrate storage tank is full, switching the first three-way valve and the second three-way valve to enable the second natural gas hydrate storage tank to be communicated with the reaction kettle and the second compressor, and disassembling and replacing the first natural gas hydrate storage tank; when the second natural gas hydrate storage tank is full, the first three-way valve and the second three-way valve are switched again, so that the replaced first natural gas hydrate storage tank is communicated with the reaction kettle and the second compressor, and the subsequent production process is the same as the above;
the hydrate generation accelerant comprises more than one of sodium dodecyl sulfate, sodium dodecyl benzene sulfonate, leucine, tetrabutylammonium bromide, tetrabutylammonium fluoride, tetrabutylammonium chloride, tetrabutylphosphonium bromide, methyl tert-butyl ether, methylcycloethane, cyclopentane, Tween-80, dodecyl trimethyl ammonium chloride, tert-butyl alcohol and ionic liquid;
after entering from the top of the reaction kettle, liquid flows along the inner wall of the reaction kettle in a membrane shape through the liquid uniform distributor, reacts with natural gas entering from the lower part of the reaction kettle to generate hydrate, the hydrate attached to the inner wall of the reaction kettle is scraped by the scraper, hydrate slurry is formed with unreacted liquid, and the hydrate slurry enters the natural gas hydrate storage tank through a pipeline at the bottom of the reaction kettle.
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| CN111378515B (en) | 2018-12-29 | 2021-02-09 | 中国科学院广州能源研究所 | Hydrate generation promoter and application thereof in methane storage |
| CN110404492B (en) * | 2019-08-22 | 2020-09-01 | 青岛科技大学 | Quick continuous preparation facilities of gas hydrate |
| CN110577851A (en) * | 2019-09-12 | 2019-12-17 | 华南理工大学 | device and method for quickly and continuously hydrating and separating coal bed gas |
| CN112361483A (en) * | 2020-11-10 | 2021-02-12 | 河南理工大学 | Building roof heat insulation method utilizing hydrate cold accumulation |
| CN114522643A (en) * | 2022-03-04 | 2022-05-24 | 中国石油大学(华东) | Temperature control device and reaction kettle, generation system and method for gas hydrate of temperature control device |
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| KR101299718B1 (en) * | 2011-09-19 | 2013-08-28 | 한국생산기술연구원 | gas and liquid circulation hydrate reactor |
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| JP2001010990A (en) * | 1999-06-30 | 2001-01-16 | Mitsui Eng & Shipbuild Co Ltd | Device for producing methane hydrate and method for producing the same |
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