CN108468534B - Simulation experiment device and method for secondary crushing and fluidization of seabed natural gas hydrate - Google Patents
Simulation experiment device and method for secondary crushing and fluidization of seabed natural gas hydrate Download PDFInfo
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- 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 50
- 238000005243 fluidization Methods 0.000 title claims abstract description 30
- 238000004088 simulation Methods 0.000 title claims abstract description 20
- 238000000034 method Methods 0.000 title claims abstract description 15
- 239000002245 particle Substances 0.000 claims abstract description 51
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 23
- 238000011084 recovery Methods 0.000 claims abstract description 11
- 238000005086 pumping Methods 0.000 claims abstract description 5
- 238000002474 experimental method Methods 0.000 claims description 17
- 238000007789 sealing Methods 0.000 claims description 12
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Natural products C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 11
- 230000008878 coupling Effects 0.000 claims description 10
- 238000010168 coupling process Methods 0.000 claims description 10
- 238000005859 coupling reaction Methods 0.000 claims description 10
- 238000012856 packing Methods 0.000 claims description 7
- 230000003068 static effect Effects 0.000 claims description 7
- 239000004744 fabric Substances 0.000 claims description 6
- 239000008187 granular material Substances 0.000 claims description 6
- 239000003345 natural gas Substances 0.000 claims description 6
- 238000005520 cutting process Methods 0.000 claims description 5
- 238000000926 separation method Methods 0.000 claims description 5
- 238000013467 fragmentation Methods 0.000 claims description 4
- 238000006062 fragmentation reaction Methods 0.000 claims description 4
- -1 natural gas hydrates Chemical class 0.000 claims description 3
- 230000000087 stabilizing effect Effects 0.000 claims 1
- 238000007599 discharging Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 10
- 239000000243 solution Substances 0.000 description 7
- 238000005065 mining Methods 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- 239000011324 bead Substances 0.000 description 3
- 238000000354 decomposition reaction Methods 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 238000010494 dissociation reaction Methods 0.000 description 2
- 230000005593 dissociations Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 238000009933 burial Methods 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000011282 treatment Methods 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/01—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells specially adapted for obtaining from underwater installations
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B41/00—Equipment or details not covered by groups E21B15/00 - E21B40/00
- E21B41/0099—Equipment or details not covered by groups E21B15/00 - E21B40/00 specially adapted for drilling for or production of natural hydrate or clathrate gas reservoirs; Drilling through or monitoring of formations containing gas hydrates or clathrates
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/001—Survey of boreholes or wells for underwater installation
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
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Abstract
The invention provides a simulation experiment device and a simulation experiment method for secondary crushing and fluidization of a seabed natural gas hydrate, the simulation experiment device for secondary crushing and fluidization comprises a secondary crushing pipeline, a rotary power assembly, a particle crushing cutter set, a blanking assembly, a crushed particle recovery device and a control system, wherein the rotary power assembly comprises a motor and a rotating shaft, the particle crushing cutter set is connected to the rotating shaft of the rotary power assembly through a flat key, the rotary power assembly is connected with the particle crushing pipeline through a bolt and a nut, a round and square flange plate welded on the particle crushing pipeline is connected with the blanking assembly through the bolt and the nut, the crushed particle recovery device is placed at the outlet of the crushing pipeline, and the control system is connected with and controls the motor and the blanking assembly of the rotary power assembly. The crushing method comprises the steps of adjusting the rotating speed of a rotary power assembly and the blanking speed of a blanking assembly through a control system, pumping circulating water, discharging non-premixed particles in a hopper, and recovering crushed particles through an outlet recovery device.
Description
Technical Field
The invention relates to the technical field of submarine natural gas hydrate exploitation, in particular to a simulation experiment device and method for simulating secondary crushing and fluidization of submarine shallow non-diagenetic hydrate solid fluidization exploitation.
Background
The natural gas hydrate is also called as combustible ice, and is unconventional energy with high density and high heat value, and the total resource amount of the global natural gas hydrate is estimated to be (1.8-2.1) × 10 when converted into methane gas16m3The carbon content of the carbon-based composite material is twice of the total reserve of energy sources such as coal, petroleum, natural gas and the like known all over the world. The prospect of marine natural gas hydrate resources in China is very wide, and according to the estimation of researchers of the ministry of land and soil resources, the total resource amount of the natural gas hydrate in the south sea only reaches 650 hundred million tons of oil equivalent, which is about half of the total resource amount of oil and natural gas on land and offshore.
At present, natural gas hydrate sampling is carried out twice in south China sea, analysis and sampling results show that the natural gas hydrate has the characteristics of shallow burial and poor cementation, and geological disasters and environmental safety problems are easily caused when mining is carried out by using conventional mining methods such as heat shock, pressure reduction, chemical reagent injection and the like. In view of the above, a solid-state fluidization green mining method for natural gas hydrate in the shallow sea floor is provided, and in 5 th of the year 2017, a solid-state fluidization method is adopted to start trial mining in the sea area of the south sea of the Shenhu and successfully ignite.
The solid fluidization method is to directly break the natural gas hydrate into solid particles under the condition of not actively changing the temperature and the pressure of the seabed hydrate deposit, namely avoiding the decomposition of the hydrate and the environment and geological disasters caused by the decomposition, pump the mixture of the natural gas hydrate particles and the seawater to the sea surface through a closed pipeline, and then carry out the treatments such as separation, decomposition, gasification and the like.
The simulating experiment device for secondary crushing and fluidizing of natural gas hydrate aims at crushing and refining hydrate cement after primary crushing or primary crushing by submerged jet flow by rotary impact to further promote the dissociation of combustible ice and silt in the cement.
As a new energy source, the mass exploitation and transportation of the natural gas hydrate are also in the exploration stage, and the natural gas hydrate is easily decomposed into natural gas at normal temperature and normal pressure, which obviously causes certain difficulty to the exploitation and exploration of the natural gas hydrate and increases the experiment cost. The appearance of hydrate substitutes can explore hydrate exploitation under the conditions of normal temperature and pressure in a laboratory. A simulation experiment device for secondary crushing and fluidization of seabed natural gas hydrate aims to use hydrate substitute particles to replace natural gas hydrate to research a secondary crushing device in a natural gas hydrate solid fluidization process under the normal temperature and pressure conditions of a laboratory. The simulated natural gas hydrate secondary crushing device reduces the experimental cost for researching the hydrate secondary crushing.
Disclosure of Invention
The invention aims to provide a secondary crushing experimental device and an experimental method which have compact structure and can simulate natural gas hydrate indoors by using natural gas hydrate substitutes.
The invention provides a simulation experiment device for secondary crushing and fluidization of a seabed natural gas hydrate, which comprises a secondary crushing pipeline, a rotary power component, a particle crushing cutter set, a blanking component, a crushed particle recovery device and a control system, wherein the rotary power component is hermetically connected with one end of the secondary crushing pipeline, the rotary power component is provided with a rotating shaft, the particle crushing cutter set is arranged on the rotating shaft, the other end of the secondary crushing pipeline is provided with an axial vertical outlet and a horizontal outlet, the blanking component is welded on a circular rotating square flange plate of the axial vertical outlet of the secondary crushing pipeline and is hermetically connected with the circular rotating square flange plate, the horizontal outlet of the secondary crushing pipeline is provided with a thread and a T-shaped connecting piece, and the control system is connected with the rotary power component and the blanking component.
In a further technical scheme, the broken pipeline one end of second grade is equipped with quiet dish and spiral inside bushing in proper order and is connected with the rotary power subassembly seals, and quiet dish and spiral bushing interval are adjustable, the broken pipeline other end of second grade is opened there is the indent circular bead, the broken pipeline axial parallel anchor ring of second grade establish 55 degrees taper screw thread with T shape connecting piece sealing connection, support piece install on the indent circular bead of the broken pipeline of secondary, the indent circular bead is equipped with the support piece of rotation axis, T shape connecting piece sticiss support piece, be equipped with the bearing between support piece and the rotation axis, the broken pipeline of second grade radially is equipped with the runner export in granule recovery unit top. One end of the T-shaped connecting piece is provided with 55-degree taper threads matched with the secondary crushing pipeline, the other end of the T-shaped connecting piece is welded with a variable diameter interface, and the other end of the variable diameter interface is connected with a moving blade.
In a further technical scheme, the rotary power assembly comprises a motor A, a plum blossom elastic coupling, a rotary shaft and an end cover, wherein the motor A is connected with the rotary shaft through the plum blossom elastic coupling; the rotation axis is installed at the center of second grade broken pipeline, and rotation axis one end is connected with plum blossom resilient coupling, and the other end cantilever is overhanging, is supported by support piece, the end cover passes through the bolt and is connected with second grade broken pipeline through the nut, and open at the end cover center has the hole that the rotation axis passes through, pack packing sealing member and bearing in the end cover and the rotation axis space.
In a further technical scheme, the broken knife tackle of granule includes sword tooth and blade disc, the blade disc is ring shape, and the outer lane is opened there is the fixed slot, and the face that the inslot is the same with rotation axis axial direction is opened there is the round hole, the sword tooth has cutting edge and root to open there is the through-hole, and the sword tooth is installed in the fixed slot of blade disc, locks through screw bolt and nut, the rotation axis is opened there is logical groove, the blade disc passes through the epaxial axle sleeve axial positioning of rotation, interval between blade disc and the blade disc is adjustable, the axle shoulder location is passed through to rotation axis one end, and the other end is opened there is the metric screw thread, adopts.
In a further technical scheme, the blanking assembly comprises a hopper, a wind closing machine, a motor B and a round-to-square special-shaped flange plate, the hopper is installed at a feed inlet of the wind closing machine, the motor B is connected with the wind closing machine, the round-to-square special-shaped flange plate is welded at an inlet of a T-shaped connecting piece, four through holes are formed in the round-to-square special-shaped flange plate, a butterfly valve is installed between the wind closing machine and the round-to-square special-shaped flange plate, an outlet of the wind closing machine is connected with the round-to-square special-shaped flange plate in a sealing mode through bolts and nuts, when the butterfly valve of the blanking assembly is opened, particles enter the hopper, the particles and water are not premixed before entering a secondary crushing pipeline, when the.
In a further technical scheme, broken granule recovery unit includes I, II types, and I type includes screen cloth and the cistern of different mesh numbers, the screen cloth arrange and install in water outlet department from big to little in proper order according to the size of eye, there is the cistern screen cloth below, water in the cistern provides power through the pump, water is at whole experimental apparatus inner loop, II types include hydrocyclone, and the rivers after the separation go into the cistern, and the granule after the separation is retrieved, whole experimental apparatus inner loop.
In a further technical scheme, the control system comprises two frequency converters, the frequency converters are respectively connected with and control the rotating speeds of the rotating power assembly motor and the blanking assembly motor, and the cutter and different particle crushing impact speeds and particle feeding speeds can obtain different crushing effects.
In a further technical scheme, a hole through which a rotating shaft passes is formed in the center of the end cover, a packing sealing element and a bearing are further installed between the inside of the end cover and the rotating shaft, the end cover is further welded with a Z-shaped supporting plate for supporting a motor, and the motor A is connected with the Z-shaped supporting plate through bolts and nuts.
The secondary seabed natural gas hydrate crushing and fluidizing simulation experiment device according to claims 2 and 3, wherein the supporting members (4) are two circular rings, a slender support is connected between the circular rings and tightly presses the outer circular ring of the supporting members (4), the inner circular ring of the supporting members (4) is provided with an axial positioning shoulder (42), and a bearing is arranged in the axial positioning shoulder (42).
On the other hand, the invention provides a secondary crushing method of the seabed natural gas hydrate, which adopts the simulation experiment device for secondary crushing and fluidization of the natural gas hydrate to simulate the secondary crushing of the natural gas hydrate on the natural gas hydrate substitute particles. The simulated secondary crushing experimental method comprises the following steps:
step S1: the cutter teeth are arranged on the cutter head, the cutter head is arranged on the rotating shaft, and the distance between the cutter head and the cutter head is adjusted;
step S2: and pumping the circulating water into the secondary crushing experimental device in the water storage tank, and adjusting the size of a pumping valve to stabilize the flow of the circulating water.
Step S3: turning on the fan motor, adjusting a frequency converter of a control system to reach a preset blanking speed;
step S4: turning on a motor of the rotary power assembly, and adjusting a frequency converter of a control system to reach a preset rotation speed of the particle crushing assembly;
step S5: filling natural gas hydrate substitute particles into a hopper and starting timing;
step S6: and closing the pump to pump the circulating water in the water storage tank, closing the blanking component motor and the rotary power component motor, and measuring and weighing the particles screened out by each screen.
Compared with the prior art, the invention has the following advantages:
(1) the blanking assembly is used for feeding natural gas hydrate substitute particles in a non-premixing and premixing mode, so that when non-premixing feeding is adopted, the influence of particle sedimentation can be reduced, the particle concentration in a crushing pipeline is ensured, and when premixing feeding is adopted, the particle crushing after the substitute and water are mixed for a period of time can be simulated;
(2) a static disc and a spiral inner bushing are designed in the crushing pipeline, the static disc increases the particle collision probability, the spiral inner bushing increases the rotational flow speed of fluid, the positions of the static disc and the inner bushing are adjustable, and the distance between the static disc and the static disc is also adjustable;
(3) the cutter teeth are detachably connected with the cutter head, and the cutter heads with different numbers and different angle grooves are only required to be replaced during experiments, so that the cutter teeth numbers with different numbers and different installation angles can be installed;
(4) a through groove is formed in the rotating shaft, and the distance between the cutter head and the cutter head can be adjusted by the cutter head arranged on the rotating shaft;
(5) the experimental device is simple to operate and low in cost, and facilitates the research of the rotary impact type breaking and dissociation of the natural gas hydrate.
The simulation experiment device for secondary crushing and fluidization of the seabed natural gas hydrate, provided by the invention, obtains an experiment crushing result by adjusting the rotating speed of the particle crushing assembly, the rotating speed of the air-shut fan of the natural gas hydrate substitute blanking assembly, the number of the cutter teeth and the distance of the cutter head, thereby reducing the experiment complexity and the experiment cost.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a simulation experiment apparatus for secondary fragmentation and fluidization of natural gas hydrate provided by the present invention;
FIG. 2 is a partial enlarged view of a simulated experimental apparatus for secondary fragmentation and fluidization of natural gas hydrates according to the present invention;
FIG. 3 is a schematic structural diagram of a support for a simulated experimental apparatus for secondary fragmentation and fluidization of natural gas hydrates, provided by the present invention;
FIG. 4 is a schematic structural diagram of a cutter head of a part of a simulation experiment device for secondary crushing and fluidization of natural gas hydrate, provided by the invention;
FIG. 5 is a schematic structural diagram of a particle crushing assembly and a schematic structural diagram of a cutter tooth of a simulation experiment device for secondary crushing and fluidization of natural gas hydrate provided by the invention;
description of reference numerals:
2-rotary power component 3-secondary crushing pipeline 4-support 5-T-shaped connecting piece 6-blanking component 7-particle crushing component 8-crushed particle recovery component 9-control system component 11-bolt 12-nut 13-packing sealing piece 14-bearing 15-Z-shaped support plate 21-motor A22-plum elastic coupling 23-shaft sleeve 24-locking nut 25-rotating shaft 26-end cover 31-secondary crushing pipeline end flange 32-secondary crushing pipeline inner concave shoulder 33-secondary crushing pipeline axial vertical outlet 34-secondary crushing pipeline horizontal outlet 35-spiral inner bushing 36-static disc 41-bearing 42-bearing axial positioning shoulder 51-circular rotating square flange 52- The water storage tank comprises a reducing connector 53, a free edge 54, a butterfly valve 61, a hopper 62, a blower 63, a motor B71, a cutter disc 711, a circular hole 712 on the cutter disc, a key groove 713 on the inner ring of the cutter disc, a cutter tooth fixing groove 72, a locking hole 73, a key groove 74, a cutter tooth 741, a cutting edge 742 on the cutter tooth, a hole 81 on the cutter tooth, a screen 82 and the like.
Detailed Description
All of the features disclosed in this specification, or all of the steps in any method or process so disclosed, may be combined in any combination, except combinations where mutually exclusive features or steps are mutually exclusive.
In order to make the objects and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
Fig. 1 is a schematic structural diagram of a simulated experiment device for secondary crushing and fluidization of natural gas hydrate, provided by the invention, fig. 2 is a partially enlarged view of the simulated experiment device for secondary crushing and fluidization of natural gas hydrate, provided by the invention, fig. 3 is a schematic structural diagram of a support of the simulated experiment device for secondary crushing and fluidization of natural gas hydrate, provided by the invention, fig. 4 is a schematic structural diagram of a cutter head of the simulated experiment device for secondary crushing and fluidization of natural gas hydrate, provided by the invention, and fig. 5 is a schematic structural diagram of a particle crushing component and a schematic structural diagram of a cutter tooth of the simulated experiment device for secondary crushing and fluidization of natural gas hydrate, provided by the invention.
As shown in fig. 1 to 5, the invention provides a simulation experiment device for secondary crushing and fluidization of a seabed natural gas hydrate, which comprises a secondary crushing pipeline, a rotary power component, a particle crushing cutter set, a blanking component, a crushed particle recovery device and a control system. The rotary power assembly is connected with one end of the secondary crushing pipeline in a closed mode and provides power for rotation of the shaft, the rotary power assembly is provided with a rotating shaft, the particle crushing cutter set is installed on the rotating shaft, the other end of the secondary crushing pipeline is provided with an axial vertical outlet and a horizontal outlet, the blanking assembly is connected with a round rotating square flange welded at the axial vertical outlet of the secondary crushing pipeline in a closed mode, the horizontal outlet of the secondary crushing pipeline is provided with a thread and a T-shaped connecting piece, and the control system is connected with the rotary power assembly and the blanking assembly.
In the technical scheme of the last step, as shown in fig. 1, a stationary disc and a spiral inner bushing are sequentially installed at one end of a secondary crushing pipeline and are connected with a rotary power assembly in a sealing mode, an inner concave shoulder is formed in the other end of the secondary crushing pipeline, 55-degree conical threads are arranged on an axially parallel ring surface of the secondary crushing pipeline and are connected with a T-shaped connecting piece in a sealing mode, the supporting piece is installed on the inner concave shoulder of the secondary crushing pipeline, the T-shaped connecting piece presses the supporting piece, and a flow channel outlet is radially formed in the secondary crushing.
In a further technical scheme, as shown in fig. 1, the rotary power assembly comprises a motor a, a quincuncial elastic coupling, a rotary shaft and an end cover, wherein the motor a and the rotary shaft are connected through the quincuncial elastic coupling; the rotation axis is installed at the center of second grade broken pipeline, and rotation axis one end is connected with plum blossom resilient coupling, and the other end cantilever is overhanging, is supported by support piece, the end cover passes through the bolt and is connected with broken pipeline through the nut, and open at the end cover center has the hole that the rotation axis passes through, pack packing sealing member and bearing in the end cover and the rotation axis space.
The technical scheme of the next step is that as shown in fig. 1, fig. 4 and fig. 5, the particle crushing cutter set comprises cutter teeth and a cutter head, the cutter head is in a circular ring shape, a fixed groove is formed in the outer ring of the cutter head, a round hole is formed in the surface, in the groove, of the same axial direction as the rotating shaft, of the cutter head, the cutter teeth are provided with cutting edges, the root portions of the cutting edges are provided with through holes, the cutter teeth are installed in the fixed groove of the cutter head and locked through bolts and nuts, and the inner ring of the cutter head.
The technical scheme of the next step is that as shown in figure 1, the blanking assembly comprises a hopper, a wind closing machine, a motor B and a round-to-square special-shaped flange plate, the hopper is installed at a feed inlet of the wind closing machine, the motor B is connected with the wind closing machine, the round-to-square special-shaped flange plate is welded at an inlet of a T-shaped connecting piece, four through holes are formed in the round-to-square special-shaped flange plate, and an outlet of the wind closing machine is connected with the round-to-square special-shaped flange plate in.
According to the technical scheme, as shown in fig. 1, the broken particle recovery device comprises screens and reservoirs with different meshes, the screens are sequentially arranged from large to small according to the sizes of the holes and are installed at a water outlet, the reservoir is arranged below the screens, water in the reservoir provides power through a pump, and the water circulates in the whole experimental device.
According to the technical scheme, the control system comprises two frequency converters arranged on the motor, and the frequency converters are respectively connected with and control the rotating speeds of the rotating power assembly motor A and the blanking assembly motor B. The crushing impact speed of the cutter teeth and the particles and the feeding speed of the particles obtain different crushing effects.
In a further technical scheme, as shown in fig. 1, a hole through which a rotating shaft passes is formed in the center of an end cover, a packing sealing element and a bearing are further installed between the inside of the end cover and the rotating shaft, a Z-shaped supporting plate for supporting a motor is further welded to the end cover, and the motor A is connected with the Z-shaped supporting plate through bolts and nuts.
The technical scheme in the near step is that a through groove is formed in a rotating shaft as shown in fig. 1 and fig. 5, the cutter head is axially positioned through a shaft sleeve on the rotating shaft, the distance between the cutter head and the cutter head is adjustable, one end of the rotating shaft is positioned through a shaft shoulder, a metric thread is formed in the other end of the rotating shaft, and the shaft sleeve is fixed through a locking nut.
In a further technical scheme, as shown in fig. 1, one end of the T-shaped connecting piece is provided with 55-degree conical threads matched with the secondary crushing pipeline, the other end of the T-shaped connecting piece is welded with a reducing interface, the other end of the reducing interface is connected with a moving blade, the flow field can be more disordered through the horn-shaped reducing interface, non-premixed particles are uniformly mixed, and the moving blade is convenient for pipe connection.
In a further technical solution, as shown in fig. 1 and 3, the supporting members are two circular rings, a slender support is connected between the circular rings and presses an outer circular ring of the supporting member, the supporting member of the rotating shaft is mounted on the concave shoulder, and a bearing is mounted between the supporting member and the rotating shaft.
The simulation experiment device and the simulation experiment method for secondary crushing and fluidization of the seabed natural gas hydrate, provided by the invention, obtain the experiment crushing result by adjusting the rotating speed of the particle crushing assembly, the rotating speed of the air-closing machine of the natural gas hydrate substitute blanking assembly, the number of the cutters and the distance of the cutter head, thereby reducing the experiment complexity and the experiment cost.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (5)
1. A simulation experiment device for secondary crushing and fluidization of a seabed natural gas hydrate is characterized by comprising a secondary crushing pipeline (3), a rotary power component (2), a particle crushing cutter set (7), a blanking component (6), a crushed particle recovery device (8) and a control system (9), wherein the rotary power component (2) is hermetically connected with one end of the secondary crushing pipeline (3), the rotary power component (2) is provided with a rotating shaft (25), the particle crushing cutter set (7) is arranged on the rotating shaft (25), the other end of the secondary crushing pipeline (3) is provided with an axial vertical outlet (33) and a horizontal outlet (34), the blanking component (6) is hermetically connected with a circular square special-shaped flange (51) welded at the axial vertical outlet of the secondary crushing pipeline (3), a horizontal outlet of the secondary crushing pipeline (3) is provided with a thread and T-shaped connecting piece (5), and a control system (9) is connected with the rotary power component (2) and the blanking component (6);
one end of the secondary crushing pipeline (3) is sequentially provided with a static disc (36) and a spiral inner bushing (35) which are connected with the rotary power assembly (2) in a sealing manner, the distance between the spiral inner bushing (35) and the static disc (36) is adjustable, the other end of the secondary crushing pipeline (3) is provided with a concave shoulder (32), the secondary crushing pipeline (3) is axially provided with 55-degree conical threads in a parallel ring surface and is connected with the T-shaped connecting piece (5) in a sealing manner, the supporting piece (4) is installed on the concave shoulder (32) of the secondary crushing pipeline, the concave shoulder (32) is provided with the supporting piece (4) of the rotating shaft (25), the T-shaped connecting piece (5) is pressed on the supporting piece (4), a bearing (41) is installed between the supporting piece (4) and the rotating shaft (25), and the secondary crushing pipeline is radially provided with a; one end of the T-shaped connecting piece (5) is provided with 55-degree conical threads matched with the secondary crushing pipeline, the other end of the T-shaped connecting piece is welded with a variable-diameter interface (52), and the other end of the variable-diameter interface (52) is connected with a movable blade (53);
the rotary power assembly (2) comprises a motor A (21), a plum blossom elastic coupling (22), a rotary shaft (25) and an end cover (26), wherein the motor A (21) is connected with the rotary shaft (25) through the plum blossom elastic coupling (22); the rotary shaft (25) is installed in the center of the secondary crushing pipeline (3), one end of the rotary shaft (25) is connected with the plum blossom elastic coupling (22), the other end of the rotary shaft (25) extends outwards and is supported by the supporting piece (4), the end cover (26) is connected with the secondary crushing pipeline (3) through bolts and nuts, a hole through which the rotary shaft (25) passes is formed in the center of the end cover (26), and a packing sealing element (13) and a bearing (14) are filled in a gap between the inner part of the end cover (26) and the rotary shaft (25);
the particle crushing cutter set (7) comprises cutter teeth (74) and a cutter head (71), the cutter head (71) is in a circular ring shape, a fixing groove (713) is formed in the outer ring of the cutter head, a round hole (711) is formed in the surface, identical to the axial direction of the rotating shaft (25), of the groove, the cutter teeth are provided with cutting edges (741) and through holes (742) are formed in the roots of the cutter teeth, the cutter teeth (74) are installed in the fixing groove (713) of the cutter head (71) and locked through bolts and nuts, a through groove is formed in the rotating shaft (25), the cutter head (71) is axially positioned through a shaft sleeve (23) on the rotating shaft (25), the distance between the cutter head (71) and the cutter head (71) is adjustable, one end of the rotating shaft (25) is positioned through a shaft shoulder, the other end of the rotating shaft is provided with;
the blanking component (6) comprises a hopper (61), a fan (62), a motor B (63) and a circular-square special-shaped flange plate (51), the hopper (61) is arranged at the feed inlet of the air shutter (62), the motor B (63) is connected with the air shutter (62), the round-to-square special-shaped flange plate (51) is welded at the inlet of the T-shaped connecting piece (5), the round-to-square special-shaped flange plate (51) is provided with four through holes, a butterfly valve (56) is arranged between the air shutoff machine (62) and the round-to-square special-shaped flange plate (51), the outlet of the air shutoff machine (62) is hermetically connected with the round-to-square special-shaped flange plate (51) through bolts and nuts, when the butterfly valve (56) of the blanking component (6) is opened, the particles enter from the hopper (61), the particles and water are not premixed before entering the secondary crushing pipeline, when the butterfly valve is closed, the particles and water enter from the right inlet together, and the particles and the water are premixed;
broken granule recovery unit (8) are including I, II types, and I type includes screen cloth (81) and cistern (82) of different mesh numbers, screen cloth (81) arrange and install in proper order from big to little at the delivery port department according to the size of eye, there is cistern (82) screen cloth (81) below, water in cistern (82) provides power through the pump, water is at whole experimental apparatus inner loop, and II types include hydrocyclone, and the rivers after the separation flow in cistern (82), and the granule after the separation is retrieved, whole experimental apparatus inner loop.
2. The simulation experiment device for secondary crushing and fluidization of seabed natural gas hydrate as claimed in claim 1, wherein the control system (9) comprises two frequency converters installed on the motor, and the frequency converters are respectively connected with and control the rotating speed of the rotating power assembly motor A (21) and the rotating speed of the blanking assembly motor B (63).
3. The secondary seabed natural gas hydrate crushing and fluidizing simulation experiment device according to claim 1, wherein a hole for a rotating shaft (25) to pass through is formed in the center of the end cover (26), a packing seal (13) and a bearing (14) are further installed between the inside of the end cover (26) and the rotating shaft (25), the end cover (26) is further welded with a Z-shaped support plate (15) for supporting a motor, and the motor A (21) is connected with the Z-shaped support plate (15) through bolts and nuts.
4. The simulated experiment device for secondary crushing and fluidization of seabed natural gas hydrate as claimed in claim 1, wherein the supporting member (4) is two rings, a slender support is connected between the rings and tightly presses an outer ring of the supporting member (4), an axial positioning shoulder (42) is arranged on an inner ring of the supporting member (4), and a bearing is arranged in the axial positioning shoulder (42).
5. A method for use in the simulated experimental apparatus for secondary fragmentation and fluidization of subsea natural gas hydrates as claimed in claim 1, comprising:
step S1: the cutter teeth (74) are arranged on the cutter head (71), the cutter head (71) is arranged on the rotating shaft (25), and the distance between the cutter head (71) and the cutter head (71) is adjusted;
step S2: pumping the circulating water into the reservoir (82) in the secondary crushing experimental device, adjusting the size of a pumping valve and stabilizing the flow of the circulating water;
step S3: turning on the fan-closing motor B (63), and adjusting a frequency converter to reach a preset blanking speed;
step S4: turning on a motor A (21) of the rotary power assembly, adjusting a frequency converter to reach the rotation speed of a preset rotating shaft (25);
step S5: charging natural gas hydrate substitute particles into a hopper (61) and starting timing;
step S6: the circulating water pumped into the reservoir (82) is shut down, the blanking assembly motor B (63) and the rotary power assembly motor A (21) are shut down, and the particles screened out by each screen (81) are measured and weighed.
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| CN114135267B (en) * | 2021-11-29 | 2023-05-05 | 西南石油大学 | Three-phase separation device for solid fluidization exploitation of natural gas hydrate |
| CN115492572B (en) * | 2022-11-21 | 2023-01-17 | 吉林大学 | One-dimensional simulation device and method for secondary formation of natural gas hydrate |
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