CN110527573B - Active carbon immobilized natural gas hydrate continuous reaction device - Google Patents
Active carbon immobilized natural gas hydrate continuous reaction device Download PDFInfo
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- CN110527573B CN110527573B CN201910952473.4A CN201910952473A CN110527573B CN 110527573 B CN110527573 B CN 110527573B CN 201910952473 A CN201910952473 A CN 201910952473A CN 110527573 B CN110527573 B CN 110527573B
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- 238000006243 chemical reaction Methods 0.000 title claims abstract description 110
- NMJORVOYSJLJGU-UHFFFAOYSA-N methane clathrate Chemical compound C.C.C.C.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O NMJORVOYSJLJGU-UHFFFAOYSA-N 0.000 title claims abstract description 65
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 55
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 42
- 239000007788 liquid Substances 0.000 claims abstract description 104
- 239000007789 gas Substances 0.000 claims abstract description 49
- 238000001816 cooling Methods 0.000 claims abstract description 35
- 238000003756 stirring Methods 0.000 claims abstract description 31
- 238000010517 secondary reaction Methods 0.000 claims abstract description 23
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 20
- 238000000926 separation method Methods 0.000 claims abstract description 11
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 46
- 238000003860 storage Methods 0.000 claims description 34
- 239000000203 mixture Substances 0.000 claims description 25
- 239000003345 natural gas Substances 0.000 claims description 22
- 230000005540 biological transmission Effects 0.000 claims description 15
- 238000005507 spraying Methods 0.000 claims description 11
- 238000007599 discharging Methods 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 8
- 238000003760 magnetic stirring Methods 0.000 claims description 7
- 239000007921 spray Substances 0.000 claims description 5
- 230000002159 abnormal effect Effects 0.000 claims description 2
- 230000001276 controlling effect Effects 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 238000002156 mixing Methods 0.000 claims description 2
- 238000012544 monitoring process Methods 0.000 claims description 2
- 230000009467 reduction Effects 0.000 claims description 2
- 230000001105 regulatory effect Effects 0.000 claims description 2
- 230000032258 transport Effects 0.000 claims description 2
- 230000000007 visual effect Effects 0.000 claims description 2
- 239000013078 crystal Substances 0.000 abstract description 2
- 238000002360 preparation method Methods 0.000 abstract description 2
- 230000015572 biosynthetic process Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- -1 mechanical stirring Chemical compound 0.000 description 4
- 238000001179 sorption measurement Methods 0.000 description 4
- 238000011161 development Methods 0.000 description 3
- USIUVYZYUHIAEV-UHFFFAOYSA-N diphenyl ether Natural products C=1C=CC=CC=1OC1=CC=CC=C1 USIUVYZYUHIAEV-UHFFFAOYSA-N 0.000 description 3
- 239000003949 liquefied natural gas Substances 0.000 description 3
- 239000004094 surface-active agent Substances 0.000 description 3
- 230000033228 biological regulation Effects 0.000 description 2
- 239000012153 distilled water Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000005587 bubbling Effects 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000003795 desorption Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000010907 mechanical stirring Methods 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 230000001932 seasonal effect Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- 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
Abstract
The invention belongs to the technical field of hydrate preparation, and particularly relates to a continuous reaction device for active carbon immobilized natural gas hydrate, which comprises a main structure, a reaction device and a reaction device, wherein the main structure comprises a stirring unit, a liquid supply unit, a cooling unit, a primary reaction unit, a secondary reaction unit, a solid-liquid separation unit, a hydrate collection unit and a gas supply unit, the natural gas hydrate is prepared by means of the specific dynamic behavior of the natural gas hydrate in a micro-nano scale limited space, the active carbon with porous characteristic and rich specific surface area is used as a carrier, pre-adsorbed water is carried out on the active carbon, so that the contact area of the gas and the liquid is increased, the two-stage reaction of a screw pump reaction kettle and a twisted pair cage reaction kettle is realized, the conversion rate of the natural gas hydrate is improved, and the continuous reaction of the natural gas hydrate is realized by the solid-liquid separation unit and the movable hydrate collection unit; the device has a simple structure, and accelerates the continuous reaction of the natural gas hydrate through the quick boosting capability of the ice crystal generated by the cooling unit and the screw pump reaction kettle.
Description
Technical field:
the invention belongs to the technical field of hydrate preparation, and particularly relates to a continuous reaction device for active carbon immobilized natural gas hydrate, which realizes efficient, rapid and continuous reaction of natural gas hydrate.
The background technology is as follows:
the Paris climate agreement in 2016, which is effective, accelerates the energy consumption structure transformation, and emits a strong signal of green low carbon and sustainable development. The process of accelerating the development and utilization of the natural gas is started. However, with the rapid increase of the demand of natural gas year by year, natural gas in many countries has a situation of supply insufficiency for a long time, and can only rely on import solution, and aiming at typical seasonal differences of natural gas demand, it is important to perfect the storage, transportation and peak regulation technology of natural gas. Besides the traditional Compressed Natural Gas (CNG), liquefied Natural Gas (LNG), underground gas storage technologies and the like, natural Gas Hydrate (NGH) plays an important role in natural gas storage and transportation and peak shaving due to the unique advantages. Compared with compressed natural gas and liquefied natural gas, the natural gas hydrate has higher gas storage capacity, the theoretical value of the natural gas hydrate can reach 164v/v, the storage environment is mild, the natural gas hydrate can be stored for a long time under the conditions of normal pressure and minus 15 ℃, and the natural gas hydrate has the characteristics of low storage cost and safety. However, the slow reaction rate has become a key issue in the development of technology due to the harsh conditions of formation and the randomness of the crystallization process: the natural gas hydrate is usually generated at the gas-liquid contact surface firstly, but the natural gas hydrate generated at the surface of the gas contacted with water prevents the gas from further diffusing into the water, so that the formation rate of the natural gas hydrate is greatly reduced, and in order to increase the contact area of the gas and the water, the methods of accelerating the generation of the natural gas hydrate, such as mechanical stirring, gas bubbling, liquid spraying and the like are widely applied, but the effect is quite unsatisfactory in the later stage of the formation of the natural gas hydrate.
The adsorption of natural gas by means of porous media has been of great interest in recent years, namely Adsorption of Natural Gas (ANG), where a large amount of natural gas is retained in the porous media during desorption, resulting in the loss of natural gas not being utilized, and thus limiting the application of natural gas adsorption. However, a large number of micropores and a high specific surface area in the porous medium provide a favorable space for the formation of natural gas hydrate, the technology of utilizing the porous medium to store natural gas in a wet manner is developed rapidly, and researches show that water molecules adsorbed on the surface of the porous medium can be arranged according to a certain rule, so that the formation of the natural gas hydrate is promoted, the induction period is greatly shortened and even eliminated, and compared with the adsorption of natural gas, the method has good consistency in the inflation and deflation of the natural gas in the wet storage of the porous medium. The activated carbon is used as a typical porous medium and has the advantages of low cost, easy acquisition and the like: the gas hydrate generation promoter disclosed in Chinese patent 201410169852.3 is a mixed solution formed by compounding nano active carbon powder and alkyl diphenyl ether disulfonate surfactant and dissolving the nano active carbon powder and the alkyl diphenyl ether disulfonate surfactant in water; calculated by the total amount of the mixed aqueous solution, the alkyl diphenyl ether disulfonate surfactant accounts for 0.01 to 0.08 percent, the nano active carbon powder accounts for 0.05 to 0.15 percent, the water accounts for 99.77 to 99.94 percent, and the sum of the mass fractions of the three is 100 percent; according to the method for forming the natural gas hydrate in the active carbon disclosed in the Chinese patent 200610150853.9, the active carbon and distilled water are added into a pressure storage tank with the pressure resistance of 20Mpa, the mass ratio of the distilled water to the active carbon is 0.8-2.2:1, the pressure in the pressure storage tank is 3-10Mpa, the temperature in the pressure storage tank is-5-25 ℃, then the natural gas is filled into the pressure storage tank to form the natural gas hydrate, the purity of methane in the natural gas is more than 99%, and the reaction time is 30-200min. Therefore, the utilization of the active carbon to fixedly load the natural gas hydrate to realize the storage of the natural gas has important significance for the storage and transportation of the natural gas and the peak shaving.
The invention comprises the following steps:
the invention aims to overcome the defects of the prior art, and develops and designs an active carbon immobilized natural gas hydrate continuous reaction device which uses the characteristics of an active carbon porous medium as a carrier to realize the efficient, rapid and continuous reaction of the natural gas hydrate.
In order to achieve the aim, the main structure of the active carbon solid-supported natural gas hydrate continuous reaction device comprises a stirring unit, a liquid supply unit, a cooling unit, a primary reaction unit, a secondary reaction unit, a solid-liquid separation unit, a hydrate collection unit and a gas supply unit; the liquid supply unit is connected with the stirring unit, the stirring unit is connected with the cooling unit, the cooling unit is connected with the primary reaction unit, the primary reaction unit is connected with the secondary reaction unit, the secondary reaction unit is respectively connected with the solid-liquid separation unit and the hydrate collection unit, and the air supply unit is respectively connected with the primary reaction unit and the secondary reaction unit.
The main machine structure of the stirring unit comprises a storage tank, a feed inlet, a liquid spraying port, stirring blades, a transmission rod, a stirring motor, a first discharge port, a first ball valve and a first corrugated pipe; the main machine structure of the liquid supply unit comprises a liquid conveying pipeline, a water tank, a constant flow pump and a first check valve; the main machine structure of the cooling unit comprises a cooling box, a single twisting cage, a twisting cage rod, a cooling motor, a first feeding hole, a first temperature sensor, a second discharging hole, a second temperature sensor, a second ball valve and a second corrugated pipe; the main machine structure of the primary reaction unit comprises a screw pump reaction kettle, a magnetic stirring rod, a first motor, a second feeding port, a first pressure sensor, a safety valve, a third temperature sensor, a first air inlet, a third discharging port, a third ball valve and a third corrugated pipe; the host structure of the secondary reaction unit comprises a double-stranded cage reaction kettle, a double-stranded cage rod, a second motor, a third feed inlet, a fourth discharge outlet, a fourth ball valve, a fourth corrugated pipe, a fourth temperature sensor, a second air inlet, a fifth discharge outlet, a fifth ball valve and a fifth corrugated pipe; the solid-liquid separation unit is a liquid collection tank; the hydrate collecting unit is a hydrate collecting tank; the host structure of the air supply unit comprises an air storage tank, a second pressure sensor, a fifth temperature sensor, an air inlet, a first air outlet, a second air outlet, a first air conveying pipeline, a second air conveying pipeline, a first air conveying valve, a first air flow controller, a second check valve, a third pressure sensor, a second air conveying valve, a second air flow controller, a third check valve and a fourth pressure sensor.
The stirring unit can realize the full mixing of the activated carbon and the liquid; the liquid supply unit is used for maintaining the liquid amounts of the cooling unit, the primary reaction unit and the secondary reaction unit constant, and the constant flow pump can continuously and stably convey the liquid in the water tank to the stirring unit; the cooling unit further precools the solid-liquid mixture to enable the solid-liquid mixture to be cooled to be below 0 ℃ rapidly, so that rapid generation of natural gas hydrate in the primary reaction unit is ensured, and meanwhile, the conveying rate of the solid-liquid mixture is adjusted; the first-stage reaction unit is used for quickly pressurizing the solid-liquid mixture to enable the solid-liquid mixture to be quickly pressurized to a set reaction pressure from the atmospheric pressure, and simultaneously carrying out first-stage reaction of the natural gas hydrate; the secondary reaction unit is used for fully reacting the natural gas hydrate to realize continuous generation of the natural gas hydrate; the solid-liquid separation unit separates the active carbon from the liquid and collects redundant liquid; the hydrate collecting unit is used for collecting the prepared natural gas hydrate and can be replaced conveniently and rapidly; the air supply unit is used for maintaining the constant pressure of the primary reaction unit and the secondary reaction unit.
Compared with the prior art, the method is characterized in that the natural gas hydrate is prepared by means of the specific dynamic behavior of the natural gas hydrate in the micro-nano scale confined space, activated carbon with porous characteristics and rich specific surface area is used as a carrier, pre-adsorbed water is carried out on the activated carbon, so that the contact area of gas and liquid is increased, the two-stage reaction of a screw pump reaction kettle and a double-twisted cage reaction kettle is carried out, the conversion rate of the natural gas hydrate is improved, and the continuous reaction of the natural gas hydrate is realized by a solid-liquid separation unit and a movable replaceable hydrate collection unit; the device has a simple structure, and accelerates the continuous reaction of the natural gas hydrate through the quick boosting capability of the ice crystal generated by the cooling unit and the screw pump reaction kettle.
Description of the drawings:
fig. 1 is a schematic diagram of the principle of the main structure of the present invention.
The specific embodiment is as follows:
the invention is further described below by way of examples and with reference to the accompanying drawings.
Example 1:
the main structure of the active carbon solid-supported natural gas hydrate continuous reaction device related to the embodiment comprises a storage tank 1, a charging port 2, a liquid spraying port 3, a transfusion pipeline 4, a water tank 5, a constant flow pump 6, a one-way valve 7, a stirring blade 8, a transmission rod 9, a stirring motor 10, a first discharge port 11, a first ball valve 12, a cooling tank 13, a single stranding cage 14, a stranding cage rod 15, a cooling motor 16, a first feed port 17, a first temperature sensor 18, a first corrugated pipe 19, a second discharge port 20, a second temperature sensor 21, a second ball valve 22, a screw pump reaction kettle 23, a magnetic stirring rod 24, a first motor 25, a second feed port 26, a first pressure sensor 27, a safety valve 28, a second corrugated pipe 29, a third temperature sensor 30, a first air inlet 31, a third discharge port 32, a third ball valve 33, a third corrugated pipe 19, a fourth corrugated pipe 30, a third temperature sensor 30, a third air inlet 31, a fourth air inlet 32, a third air inlet 33, a third air inlet the double-twisted cage reaction kettle 34, the double-twisted cage rod 35, the second motor 36, the third feed inlet 37, the fourth discharge outlet 38, the third corrugated pipe 39, the fourth ball valve 40, the fourth corrugated pipe 41, the liquid collection tank 42, the fourth temperature sensor 43, the second air inlet 44, the fifth discharge outlet 45, the fifth ball valve 46, the fifth corrugated pipe 47, the hydrate collection tank 48, the air storage tank 49, the second pressure sensor 50, the fifth temperature sensor 51, the air inlet 52, the first air outlet 53, the second air outlet 54, the first air conveying pipeline 55, the second air conveying pipeline 56, the first air conveying valve 57, the first air flow controller 58, the second one-way valve 59, the third pressure sensor 60, the second air conveying valve 61, the second air flow controller 62, the third one-way valve 63 and the fourth pressure sensor 64; the top of the storage tank 1 is provided with a feed inlet 2 and a liquid spraying port 3, the liquid spraying port 3 is connected with a water tank 5 through a liquid conveying pipeline 4, a constant flow pump 6 and a first check valve 7 are arranged on the liquid conveying pipeline 4, a stirring blade 8 is arranged in the storage tank 1, the stirring blade 8 is connected with a stirring motor 10 arranged outside the storage tank 1 through a transmission rod 9, the bottom of the storage tank 1 is provided with a first discharge port 11, and a first ball valve 12 is arranged on the first discharge port 11; a single twisting cage 14 is arranged in the cooling box 13, a twisting cage rod 15 is arranged in the single twisting cage 14, the twisting cage rod 15 is connected with a cooling motor 16 arranged outside the cooling box 13, a first feeding hole 17 is arranged at the bottom of the single twisting cage 14, a first temperature sensor 18 is arranged on the first feeding hole 17, the first feeding hole 17 is connected with a first discharging hole 11 through a first corrugated pipe 19, a second discharging hole 20 is arranged at the top of the single twisting cage 14, and a second temperature sensor 21 and a second ball valve 22 are arranged on the second discharging hole 20; the inside of the screw pump reaction kettle 23 is provided with a magnetic stirring rod 24, the magnetic stirring rod 24 is connected with a first motor 25 arranged outside the screw pump reaction kettle 23, the tail part of the screw pump reaction kettle 23 is provided with a second feed inlet 26, the second feed inlet 26 is provided with a first pressure sensor 27 and a safety valve 28, the second feed inlet 26 is connected with a second discharge outlet 20 through a second corrugated pipe 29, the middle part of the screw pump reaction kettle 23 is provided with a third temperature sensor 30, the head part of the screw pump reaction kettle 23 is provided with a first air inlet 31 and a third discharge outlet 32, and the third discharge outlet 32 is provided with a third ball valve 33; the inside of the double-stranded cage reaction kettle 34 is provided with a double-stranded cage rod 35, the double-stranded cage rod 35 is connected with a second motor 36 arranged outside the double-stranded cage reaction kettle 34, the bottom of the double-stranded cage reaction kettle 34 is provided with a third feed port 37 and a fourth discharge port 38, the third feed port 37 is connected with the third discharge port 32 through a third corrugated pipe 39, the fourth discharge port 38 is provided with a fourth ball valve 40, the fourth discharge port 38 is connected with a liquid collecting tank 42 through a fourth corrugated pipe 41, the middle part of the double-stranded cage reaction kettle 34 is provided with a fourth temperature sensor 43, the top of the double-stranded cage reaction kettle 34 is provided with a second air inlet 44 and a fifth discharge port 45, the fifth discharge port 45 is provided with a fifth ball valve 46, and the fifth discharge port 45 is connected with a hydrate collecting tank 48 through a fifth corrugated pipe 47; the top of gas holder 49 is provided with No. two pressure sensor 50 and No. five temperature sensor 51, the lateral wall of gas holder 49 is provided with air inlet 52, gas outlet 53 and No. two gas outlets 54, no. one gas outlet 53 and No. two gas outlets 54 are connected with No. one air inlet 31 and No. two air inlets 44 through No. one gas transmission pipeline 55 and No. two gas transmission pipeline 56 respectively, be provided with No. one gas transmission valve 57, no. one gas flow controller 58, no. two check valves 59 and No. three pressure sensor 60 on the gas transmission pipeline 55, be provided with No. two gas transmission valve 61, no. two gas flow controller 62, no. three check valves 63 and No. four pressure sensor 64 on the gas transmission pipeline 56.
The spray nozzle is arranged in the spray nozzle 3 related to the embodiment; the single twisting cage 14 is a twisting cage reaction kettle disclosed in Chinese patent 201910464078.1; the screw pump reaction kettle 23 is a reaction kettle taking a screw pump as a conveying and pressurizing element; the first motor 25 and the second motor 36 are planetary reduction brushless motors; the pressure at the second inlet 26 is atmospheric pressure; the twisted cage bars 35 are provided with twisted cage blades; the double-stranded-cage reaction kettle 34 is a stranded-cage reaction kettle in which a stranded-cage rod in the stranded-cage reaction kettle disclosed in China patent 201910464078.1 is replaced by a double-stranded-cage rod; a filter screen is arranged at the fourth discharge hole 38; the liquid collection tank 42 is a container with a liquid level alarm, and when the liquid level reaches a set liquid level, an audible and visual alarm occurs to remind workers of timely liquid discharge.
When the active carbon immobilized natural gas hydrate continuous reaction device related to the embodiment is used for producing natural gas hydrate in a thermostatic chamber provided with a gas alarm, a cooling unit and a secondary reaction unit are arranged on a rotating bracket, the inclination angle of the rotating bracket is adjusted to 45 degrees, and a first temperature sensor 18, a second temperature sensor 21, a first pressure sensor 27, a third temperature sensor 30, a fourth temperature sensor 43, a second pressure sensor 50, a fifth temperature sensor 51, a third pressure sensor 60 and a fourth pressure sensor 64 are connected with a data acquisition box and a computer; opening the first air feed valve 57 and the second air feed valve 61, and monitoring the gas consumption amount by the first gas flow controller 58 and the second gas flow controller 62; setting the temperature of a cooling box to be minus 10 ℃, when the pressure of a screw pump reaction kettle 23 and a double-strand cage reaction kettle 34 is 7MPa, opening a first motor 25 and a second motor 36, setting the rotating speed of the first motor 25 to be 600r/min, setting the rotating speed of the second motor 36 to be 90r/min, and when the temperature values of a first temperature sensor 18, a second temperature sensor 21, a third temperature sensor 30, a fourth temperature sensor 43 and a fifth temperature sensor 51 all reach set values, opening a stirring motor 10, adding active carbon into a storage tank 1 through a feed inlet 2, opening a liquid spraying opening 3, spraying liquid in the form of liquid drops into the storage tank 1, wherein the mass ratio of the active carbon to the liquid is 1:1, and stirring the liquid and the active carbon by a stirring blade 8 to enable the liquid and the active carbon to be fully mixed to form a solid-liquid mixture; the conveying rate of the solid-liquid mixture is regulated by controlling the rotating speed of a cooling motor 16, the solid-liquid mixture sequentially passes through a first discharge port 11, a first corrugated pipe 19 and a first feed port 17 and enters a cooling unit for further precooling, so that the solid-liquid mixture is quickly cooled to below-5 ℃, the precooled solid-liquid mixture sequentially passes through a second discharge port 20, a second corrugated pipe 29 and a second feed port 26 and enters a first-stage reaction unit, the solid-liquid mixture is quickly pressurized by a screw pump reaction kettle 23 to be quickly pressurized to 7MPa from atmospheric pressure, gas is introduced into the screw pump reaction kettle 23 from a first air inlet 31 for carrying out first-stage reaction, the pressure of the screw pump reaction kettle 23 is kept constant, the natural gas hydrate of the solid-supported active carbon is generated, and when the pressure is abnormal (> 0.15 MPa), the safety valve 28 automatically relieves the pressure; the mixture of the active carbon, the liquid and the natural gas hydrate of the solid-supported active carbon enters a secondary reaction unit through a third discharge hole 32, a third corrugated pipe 39 and a third feed hole 37, gas is introduced into a double-stranded-cage reaction kettle 34 from a second gas inlet 44 to carry out secondary reaction and maintain the internal pressure of the reaction kettle constant, the natural gas hydrate of the solid-supported active carbon is further generated, the natural gas hydrate of the solid-supported active carbon is carried by a double-stranded-cage rod 35 to move towards a fifth discharge hole 45, the natural gas hydrate enters a hydrate collection tank 48 through a fifth corrugated pipe 47, after the hydrate collection tank 48 is filled, a fifth ball valve 46 is closed, the hydrate collection tank 48 is transported away by a hydrate collection tank transport vehicle, meanwhile, the other hydrate collection tank 48 is connected with the double-stranded-cage reaction kettle 34 through a fifth corrugated pipe 47, the fifth ball valve 46 is opened to continuously collect the natural gas hydrate of the solid-supported active carbon, and the liquid which does not participate in the reaction flows into the liquid collection tank 42 through a fourth discharge hole 38; during production, the gas carrier delivers gas to the gas reservoir 49 through the gas inlet 52.
The temperature regulation range of the thermostatic chamber related to the embodiment is-10-40 ℃; the inclination angle adjusting range of the rotary bracket is 0-90 degrees; the gas is natural gas; the liquid is water.
Claims (4)
1. The active carbon solid-supported natural gas hydrate continuous reaction device is characterized in that the main structure comprises a stirring unit, a liquid supply unit, a cooling unit, a primary reaction unit, a secondary reaction unit, a solid-liquid separation unit, a hydrate collection unit and an air supply unit; the liquid supply unit is connected with the stirring unit, the stirring unit is connected with the cooling unit, the cooling unit is connected with the primary reaction unit, the primary reaction unit is connected with the secondary reaction unit, the secondary reaction unit is respectively connected with the solid-liquid separation unit and the hydrate collection unit, the air supply unit is respectively connected with the primary reaction unit and the secondary reaction unit, and the main machine structure of the stirring unit comprises a storage tank, a feed inlet, a liquid spraying port, stirring blades, a transmission rod, a stirring motor, a first discharge port, a first ball valve and a first corrugated pipe; the main machine structure of the liquid supply unit comprises a liquid conveying pipeline, a water tank, a constant flow pump and a first check valve; the main machine structure of the cooling unit comprises a cooling box, a single twisting cage, a twisting cage rod, a cooling motor, a first feeding hole, a first temperature sensor, a second discharging hole, a second temperature sensor, a second ball valve and a second corrugated pipe; the main machine structure of the primary reaction unit comprises a screw pump reaction kettle, a magnetic stirring rod, a first motor, a second feeding port, a first pressure sensor, a safety valve, a third temperature sensor, a first air inlet, a third discharging port, a third ball valve and a third corrugated pipe; the host structure of the secondary reaction unit comprises a double-stranded cage reaction kettle, a double-stranded cage rod, a second motor, a third feed inlet, a fourth discharge outlet, a fourth ball valve, a fourth corrugated pipe, a fourth temperature sensor, a second air inlet, a fifth discharge outlet, a fifth ball valve and a fifth corrugated pipe; the solid-liquid separation unit is a liquid collection tank; the hydrate collecting unit is a hydrate collecting tank; the main machine structure of the air supply unit comprises an air storage tank, a second pressure sensor, a fifth temperature sensor, an air inlet, a first air outlet, a second air outlet, a first air transmission pipeline, a second air transmission pipeline, a first air transmission valve, a first air flow controller, a second check valve, a third pressure sensor, a second air transmission valve, a second air flow controller, a third check valve and a fourth pressure sensor; the top of the storage tank is provided with a feed inlet and a liquid spraying port, the liquid spraying port is connected with the water tank through a liquid conveying pipeline, a constant flow pump and a first check valve are arranged on the liquid conveying pipeline, the inside of the storage tank is provided with stirring blades, the stirring blades are connected with a stirring motor arranged outside the storage tank through a transmission rod, the bottom of the storage tank is provided with a first discharge port, and a first ball valve is arranged on the first discharge port; a single twisting cage is arranged in the cooling box, a twisting cage rod is arranged in the single twisting cage and is connected with a cooling motor arranged outside the cooling box, a first feeding hole is formed in the bottom of the single twisting cage, a first temperature sensor is arranged on the first feeding hole, the first feeding hole is connected with a first discharging hole through a first corrugated pipe, a second discharging hole is formed in the top of the single twisting cage, and a second temperature sensor and a second ball valve are arranged on the second discharging hole; the inside of the screw pump reaction kettle is provided with a magnetic stirring rod, the magnetic stirring rod is connected with a first motor arranged outside the screw pump reaction kettle, the tail part of the screw pump reaction kettle is provided with a second feed inlet, a first pressure sensor and a safety valve are arranged on the second feed inlet, the second feed inlet is connected with a second discharge port through a second corrugated pipe, the middle part of the screw pump reaction kettle is provided with a third temperature sensor, the head part of the screw pump reaction kettle is provided with a first air inlet and a third discharge port, and a third ball valve is arranged on the third discharge port; the inside of the double-stranded cage reaction kettle is provided with a double-stranded cage rod, the double-stranded cage rod is connected with a second motor arranged outside the double-stranded cage reaction kettle, the bottom of the double-stranded cage reaction kettle is provided with a third feed inlet and a fourth discharge outlet, the third feed inlet is connected with the third discharge outlet through a third corrugated pipe, the fourth discharge outlet is provided with a fourth ball valve, the fourth discharge outlet is connected with a liquid collecting tank through a fourth corrugated pipe, the middle part of the double-stranded cage reaction kettle is provided with a fourth temperature sensor, the top of the double-stranded cage reaction kettle is provided with a second air inlet and a fifth discharge outlet, the fifth discharge outlet is provided with a fifth ball valve, and the fifth discharge outlet is connected with the hydrate collecting tank through a fifth corrugated pipe; the top of the air storage tank is provided with a second pressure sensor and a fifth temperature sensor, the side wall of the air storage tank is provided with an air inlet, a first air outlet and a second air outlet, the first air outlet and the second air outlet are respectively connected with the first air inlet and the second air inlet through a first air pipeline and a second air pipeline, the first air pipeline is provided with a first air supply valve, a first air flow controller, a second check valve and a third pressure sensor, the second air pipeline is provided with a second air supply valve, a second air flow controller, a third check valve and a fourth pressure sensor, and a spray nozzle is arranged in the spray nozzle; the screw pump reaction kettle is a reaction kettle taking a screw pump as a conveying and pressurizing element; the first motor and the second motor are planetary reduction brushless motors; the pressure at the second feed inlet is atmospheric pressure; the twisted cage bars are provided with twisted cage blades; a filter screen is arranged at the fourth discharge hole; the liquid collecting tank is a container with a liquid level alarm, and when the liquid level reaches a set liquid level, an audible and visual alarm is generated to remind workers of timely liquid discharge.
2. The active carbon immobilized natural gas hydrate continuous reaction device according to claim 1, wherein the stirring unit can realize the full mixing of the active carbon and the liquid; the liquid supply unit is used for maintaining the liquid amounts of the cooling unit, the primary reaction unit and the secondary reaction unit constant, and the constant flow pump can continuously and stably convey the liquid in the water tank to the stirring unit; the cooling unit further precools the solid-liquid mixture to enable the solid-liquid mixture to be cooled to be below 0 ℃ rapidly, so that rapid generation of natural gas hydrate in the primary reaction unit is ensured, and meanwhile, the conveying rate of the solid-liquid mixture is adjusted; the first-stage reaction unit is used for quickly pressurizing the solid-liquid mixture to enable the solid-liquid mixture to be quickly pressurized to a set reaction pressure from the atmospheric pressure, and simultaneously carrying out first-stage reaction of the natural gas hydrate; the secondary reaction unit is used for fully reacting the natural gas hydrate to realize continuous generation of the natural gas hydrate; the solid-liquid separation unit separates the active carbon from the liquid and collects redundant liquid; the hydrate collecting unit is used for collecting the prepared natural gas hydrate and can be replaced conveniently and rapidly; the air supply unit is used for maintaining the constant pressure of the primary reaction unit and the secondary reaction unit.
3. The continuous reaction device for the active carbon immobilized natural gas hydrate, which is characterized in that when a thermostatic chamber provided with a gas alarm is used for producing the natural gas hydrate, a cooling unit and a secondary reaction unit are arranged on a rotating bracket, the inclination angle of the rotating bracket is adjusted to be 45 degrees, and a first temperature sensor, a second temperature sensor, a first pressure sensor, a third temperature sensor, a fourth temperature sensor, a second pressure sensor, a fifth temperature sensor, a third pressure sensor and a fourth pressure sensor are connected with a data acquisition box and a computer; opening a first gas feeding valve and a second gas feeding valve, and monitoring the gas consumption through a first gas flow controller and a second gas flow controller; setting the temperature of a cooling box to be minus 10 ℃, when the pressure of a screw pump reaction kettle and a double-strand cage reaction kettle is 7MPa, opening a first motor and a second motor, setting the rotating speed of the first motor to be 600r/min, setting the rotating speed of the second motor to be 90r/min, when the temperature values of a first temperature sensor, a second temperature sensor, a third temperature sensor, a fourth temperature sensor and a fifth temperature sensor reach set values, opening a stirring motor, adding active carbon into a storage tank through a feed inlet, opening a liquid spraying opening to spray liquid in the form of liquid drops into the storage tank, wherein the mass ratio of the active carbon to the liquid is 1:1, and stirring the liquid and the active carbon by a stirring blade to fully mix the liquid and the active carbon to form a solid-liquid mixture; the method comprises the steps of regulating the conveying rate of a solid-liquid mixture by controlling the rotating speed of a cooling motor, enabling the solid-liquid mixture to enter a cooling unit through a first discharge hole, a first corrugated pipe and a first feed hole in sequence for further precooling, enabling the precooled solid-liquid mixture to be quickly cooled to below-5 ℃, enabling the precooled solid-liquid mixture to enter a first-stage reaction unit through a second discharge hole, a second corrugated pipe and a second feed hole in sequence, enabling a screw pump reaction kettle to quickly pressurize the solid-liquid mixture to 7MPa from atmospheric pressure, enabling gas to enter the screw pump reaction kettle from a first air inlet for first-stage reaction, keeping the pressure of the screw pump reaction kettle constant, and generating natural gas hydrate of solid-carried activated carbon, and enabling a safety valve to automatically release pressure when the pressure is abnormal (> 0.15 MPa); the method comprises the steps that a mixture of active carbon, liquid and natural gas hydrate of the immobilized active carbon enters a secondary reaction unit through a third discharge hole, a third corrugated pipe and a third feed hole, gas is introduced into a double-stranded-cage reaction kettle from a second air inlet to carry out secondary reaction, the internal pressure of the reaction kettle is kept constant, the natural gas hydrate of the immobilized active carbon is further generated, the natural gas hydrate of the immobilized active carbon is carried by a double-stranded-cage rod to move towards a fifth discharge hole, the natural gas hydrate enters a hydrate collection tank through a fifth corrugated pipe, after the hydrate collection tank is filled, a fifth ball valve is closed, the hydrate collection tank is carried away by a hydrate collection tank carrier, meanwhile, the other hydrate collection tank is connected with the double-stranded-cage reaction kettle through the fifth corrugated pipe, the fifth ball valve is opened to continuously collect the natural gas hydrate of the immobilized active carbon, and the liquid which does not participate in the reaction flows into the liquid collection tank through a fourth discharge hole; in the production process, the gas transporting vehicle transports gas to the gas storage tank through the gas inlet.
4. The active carbon immobilized natural gas hydrate continuous reaction device according to claim 3, wherein the temperature adjustment range of the thermostatic chamber is-10-40 ℃; the inclination angle adjusting range of the rotary bracket is 0-90 degrees; the gas is natural gas; the liquid is water.
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