CN111530645A - Stable vortex type multistage cyclone coarse powder separator and working method thereof - Google Patents
Stable vortex type multistage cyclone coarse powder separator and working method thereof Download PDFInfo
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- CN111530645A CN111530645A CN202010359127.8A CN202010359127A CN111530645A CN 111530645 A CN111530645 A CN 111530645A CN 202010359127 A CN202010359127 A CN 202010359127A CN 111530645 A CN111530645 A CN 111530645A
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- 239000000843 powder Substances 0.000 title claims abstract description 105
- 238000000034 method Methods 0.000 title claims abstract description 12
- 239000003245 coal Substances 0.000 claims abstract description 38
- 230000000087 stabilizing effect Effects 0.000 claims abstract description 29
- 239000000126 substance Substances 0.000 claims abstract description 13
- 238000002156 mixing Methods 0.000 claims description 17
- 238000001914 filtration Methods 0.000 claims description 11
- 230000009471 action Effects 0.000 claims description 8
- 239000007779 soft material Substances 0.000 claims description 6
- 230000005484 gravity Effects 0.000 claims description 5
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- 239000012535 impurity Substances 0.000 claims description 5
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- 235000017166 Bambusa arundinacea Nutrition 0.000 claims description 3
- 235000017491 Bambusa tulda Nutrition 0.000 claims description 3
- 241001330002 Bambuseae Species 0.000 claims description 3
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims description 3
- 239000011425 bamboo Substances 0.000 claims description 3
- 230000008569 process Effects 0.000 claims description 2
- 235000012054 meals Nutrition 0.000 claims 7
- 238000004064 recycling Methods 0.000 claims 3
- 230000001105 regulatory effect Effects 0.000 claims 1
- 238000000926 separation method Methods 0.000 abstract description 14
- 239000004568 cement Substances 0.000 abstract description 2
- 238000005272 metallurgy Methods 0.000 abstract description 2
- 238000010248 power generation Methods 0.000 abstract description 2
- 238000003889 chemical engineering Methods 0.000 abstract 1
- 239000002817 coal dust Substances 0.000 description 6
- 230000000903 blocking effect Effects 0.000 description 5
- 238000005299 abrasion Methods 0.000 description 4
- 239000012530 fluid Substances 0.000 description 4
- 240000007594 Oryza sativa Species 0.000 description 2
- 235000007164 Oryza sativa Nutrition 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000003116 impacting effect Effects 0.000 description 2
- 238000010298 pulverizing process Methods 0.000 description 2
- 235000009566 rice Nutrition 0.000 description 2
- 239000010419 fine particle Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
- B04C5/00—Apparatus in which the axial direction of the vortex is reversed
- B04C5/24—Multiple arrangement thereof
- B04C5/26—Multiple arrangement thereof for series flow
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
- B04C11/00—Accessories, e.g. safety or control devices, not otherwise provided for, e.g. regulators, valves in inlet or overflow ducting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
- B04C5/00—Apparatus in which the axial direction of the vortex is reversed
- B04C5/02—Construction of inlets by which the vortex flow is generated, e.g. tangential admission, the fluid flow being forced to follow a downward path by spirally wound bulkheads, or with slightly downwardly-directed tangential admission
- B04C5/06—Axial inlets
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
- B04C5/00—Apparatus in which the axial direction of the vortex is reversed
- B04C5/08—Vortex chamber constructions
- B04C5/103—Bodies or members, e.g. bulkheads, guides, in the vortex chamber
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
- B04C5/00—Apparatus in which the axial direction of the vortex is reversed
- B04C5/08—Vortex chamber constructions
- B04C5/107—Cores; Devices for inducing an air-core in hydrocyclones
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
- B04C9/00—Combinations with other devices, e.g. fans, expansion chambers, diffusors, water locks
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
- B04C9/00—Combinations with other devices, e.g. fans, expansion chambers, diffusors, water locks
- B04C2009/004—Combinations with other devices, e.g. fans, expansion chambers, diffusors, water locks with internal filters, in the cyclone chamber or in the vortex finder
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- Fluid Mechanics (AREA)
- Cyclones (AREA)
Abstract
The invention discloses a stable vortex type multi-stage cyclone coarse powder separator and a working method thereof, which relate to the field of matched equipment such as thermal power generation, cement, chemical engineering, metallurgy and the like, and the stable vortex type multi-stage cyclone coarse powder separator comprises an outer shell, an inner cone, an inlet pipe, an outlet pipe and a powder return pipe; the outer shell body is sleeved outside the inner cone body, an annular cavity is formed between the outer shell body and the inner cone body, the lower end of the outer shell body is connected with the inlet pipe and the powder return pipe, an inner annular cavity is formed between the powder return pipe and the inlet pipe, the upper end of the inner cone body is connected with the outlet pipe, a central cylinder is arranged in the inner cone body, and a flow guide device is arranged in the inlet pipe. The vortex-stabilizing multistage cyclone coarse powder separator can flexibly adjust the fineness of coal powder, solves the problems that the existing radial coarse powder separator is easily blocked by soft substances, an inner cone is worn, a central cylinder is deformed, the concentration of an outlet is uneven and the like by adding a multistage separation part and a vortex stabilizing part, and greatly improves the performance of the separator.
Description
Technical Field
The invention relates to the field of matched equipment for thermal power generation, cement, chemical industry, metallurgy and the like, in particular to a pulverized coal separator of a coal-fired power plant pulverizing system.
Background
The coarse powder separator is a key device for separating coarse and fine coal powder in a pulverizing system, has the functions of separating qualified fine powder and separating unqualified coarse powder, and returns the unqualified coarse powder to a coal mill for grinding. In the early stage, a radial coarse powder separator is introduced domestically and widely applied domestically, most of the existing domestic medium-speed coal mill separation technologies are radial separators, but the following problems are exposed after the related separation technologies are operated: baffle wearing and tearing and maintenance difficulty, baffle jam often, soft material blocks up seriously, centrifugal force is not enough, the internal flow field vibrates, inner cone lower part secondary backward flow is serious, import pipe buggy concentration is uneven etc. cause separation efficiency low, the homogeneity index is relatively poor, easily blockked up and the resistance is on the large side, the vibration of inside fluid causes the deformation scheduling problem of center tube, and then has influenced equipment utilization efficiency.
Disclosure of Invention
The invention provides a stable vortex type multistage cyclone coarse powder separator and a working method thereof, aiming at solving the problems that the existing radial coarse powder separator is easily blocked by soft substances, the separation efficiency is low, a central cylinder is deformed, the outlet concentration is uneven and the like. The vortex-stabilizing multi-stage cyclone coarse powder separator is provided with a flow guide device comprising an upper flow guide part and a lower flow guide part, a vortex stabilizing device for generating centrifugal force, uniformly introducing fluid and breaking soft substances, a filtering device for blocking the soft substances filtered off and a vortex-stabilizing device for stabilizing a flow field, and an anti-mixing cone device for avoiding secondary backflow is added, so that the performance index of the separator is improved; in addition, the invention can solve the problems of easy blockage of the baffle, abrasion of the inner cone and the inner cone cap and the like, and has flexible combination mode.
The technical scheme adopted by the invention for solving the problems is as follows: the utility model provides a steady vortex type multistage cyclone coarse powder separator which characterized in that: comprises an outer shell, an inner cone, an inlet pipe, an outlet pipe and a powder return pipe; the outer shell is sleeved outside the inner cone, an annular cavity is formed between the outer shell and the inner cone, the lower end of the outer shell is connected with the inlet pipe and the powder return pipe, an inner annular cavity is formed between the powder return pipe and the inlet pipe, the upper end of the inner cone is connected with the outlet pipe, a central cylinder is arranged in the inner cone, and a flow guide device is arranged in the inlet pipe; the outer shell, the inner cone, the central cylinder and the inlet pipe are coaxially arranged, the upper end of the inlet pipe and the upper end of the outlet pipe are both provided with expanding cone sections, the top end of the outer shell is higher than the top end of the inner cone, the top end of the inner cone is vertically provided with a plurality of radial baffles, the radial baffles are uniformly arranged in the circumferential direction and are connected with the top end of the outer shell through adjusting shafts, and the adjusting shafts are used for adjusting the angles of the radial baffles to generate different centrifugal forces; the lower extreme of interior cone is provided with the cone device of preventing mixing that is used for preventing the middlings secondary that separates down, the lower extreme of preventing mixing the cone device is provided with plate airlock, prevents the blowby, the below of plate airlock is provided with interior cone cap, the flaring cone section of import pipe upper end is just facing interior cone cap, interior cone cap links to each other with plate airlock, plate airlock link up mutually with the bottom of interior cone.
Further, the flow guide device comprises an upper flow guide part and a lower flow guide part, and the lower flow guide part is positioned below the upper flow guide part; the lower guide part comprises lower blades and a lower central shaft, and the lower blades are arranged on the lower central shaft and are used for generating centrifugal force and enabling a flow field to be uniform; the upper guide part comprises an upper blade, an upper central shaft and a stable shaft, the upper blade is arranged on the upper central shaft, the stable shaft penetrates through the upper blade and is connected to the upper central shaft, and the stable shaft is arranged on the back of the twisted surface of the upper blade and is used for generating centrifugal force; the top end of the upper central shaft is connected with a vortex stabilizing piece, the height of the vortex stabilizing piece is not more than the distance between the top end of the upper central shaft and the inner cone cap, and the distance is ensured to be between 100mm and 1000 mm; the guide device generating centrifugal force enables the fluid to move upwards in a swirling mode without impacting the inner cone cap, and abrasion of the inner cone is reduced.
Furthermore, the inner wall lower part of shell body is provided with a plurality of little baffles that are circumference align to grid, the structure of little baffle mainly is not foraminiferous sector plate and takes the sector plate of a plurality of holes, little baffle can pass through the staff to be fixed on the inner wall of shell body, also can the snap-on the inner wall of shell body, and the quantity of little baffle is 12~ 36.
Furthermore, the upper portion of inner ring cavity is provided with filter equipment, and its inner member is circumference align to grid, filter equipment includes horizontal pole and filter unit, filter unit sets up on the horizontal pole, filter unit can be 1~3 little horizontal pole filter unit I, also can be the filter unit II of rice font, also can be the filter unit III of taking the number of times shape.
Further, it comprises down-round platform and vortex core spare that the area is big, the area is little down to prevent mixing the awl device, the top of down-round platform is a little higher than the bottom of inner cone, the bottom of down-round platform is higher than the top of interior conical cap, vortex core spare sets up the top surface middle part at down-round platform perpendicularly, the height of vortex core spare is greater than 10 mm.
Further, be provided with the vortex stabilizing device that is used for preventing the coarse powder secondary backward flow that separates in the section of thick bamboo of center, vortex stabilizing device and the coaxial arrangement of section of thick bamboo of center, vortex stabilizing device can only include steady vortex stick, also can set up the round platform that keeps off the powder on steady vortex stick, and set up the perforation on the round platform that keeps off the powder.
Furthermore, a hand hole is formed in the lower end of the powder return pipe.
The working method of the stable vortex type multi-stage cyclone coarse powder separator is characterized in that: the process is as follows: coal powder and air flow enter the inlet pipe at a certain speed, form stable air flow and rotate under the action of a flow guide device in the inlet pipe, generate centrifugal force and break soft substances, the rotating air flow enters the annular cavity through the tapered section, thicker coal powder rotates to the inner wall of the outer shell or further rotates to the side wall of the outer shell after passing through the small baffle, and then falls into the powder return pipe along the wall surface under the action of gravity; the residual coal powder continuously rises along the annular cavity, tangentially enters the radial baffle to generate further rotational flow, and is further centrifugally separated; the coarse coal powder is separated along the inner wall of the inner cone, the separated coarse powder is prevented from flowing back secondarily by the anti-mixing cone device arranged at the lower end of the inner cone, the separated coal powder enters the built-in plate type air locker, when the materials in the plate type air locker are accumulated to a certain degree, the separated coal powder falls into the powder return pipe, and the qualified coal powder is discharged from the outlet pipe through the central cylinder; the soft materials or impurities falling and separated from the coarse powder are discharged after passing through a filtering device in the powder return pipe.
Compared with the prior art, the invention has the following advantages and effects:
1. the flow guide device with two layers of inner components is arranged in the inlet pipe, so that impact separation and abrasion of the inner cone cap are basically eliminated, and the problem of uneven flow field entering the separator is solved;
2. the guide device with two layers of inner members arranged in the inlet pipe can break soft substances, so that the radial baffle plate is prevented from being blocked by the soft substances;
3. the multi-stage separation theory is adopted, so that the separation efficiency is improved;
4. a vortex stabilizing piece is added, so that low separation efficiency and equipment damage caused by vortex core oscillation are avoided;
5. the lower part of the inner cone is added with the anti-mixing cone device, so that secondary entrainment of fine particles collected in the plate type air locking device at the bottom of the inner cone is prevented, and the separation efficiency is improved.
Drawings
FIG. 1 is a schematic diagram of a vortex-stabilized multi-stage cyclone coarse powder separator in an embodiment of the invention;
FIG. 2 is a schematic diagram of the vortex stabilizing device of FIG. 1 according to the present invention;
FIG. 3 is a schematic top view of the filter assembly of FIG. 1 according to the present invention;
FIG. 4 is a second schematic top view of the filter assembly of FIG. 1 in accordance with the present invention;
FIG. 5 is a schematic top view of the filter assembly of FIG. 1 according to the present invention;
FIG. 6 is a schematic view of a first construction of the baffle of FIG. 1 in accordance with the present invention;
FIG. 7 is a second schematic view of the baffle of FIG. 1 according to the present invention;
FIG. 8 is a schematic view of the lower baffle member of FIG. 1 according to the present invention;
fig. 9 is a schematic structural view of the upper baffle member of fig. 1 according to the present invention.
In the figure: an inlet pipe 1, a hand hole 2, a powder return pipe 3, a flow guide device 4, a vortex stabilizing member 5, a filtering device 6, a cone expanding section 7, an inner cone cap 8, a plate type air locker 9, an anti-mixing cone device 10, a small baffle 11, an outer shell 12, an annular cavity 13, an inner cone 14, a central cylinder 15, a vortex stabilizing device 16, a radial baffle 17, an adjusting shaft 18, an inner ring cavity 19, an outlet pipe 20,
An upper flow guide 41, a lower flow guide 42, an upper blade 411, an upper central shaft 412, a stabilizing shaft 413, a lower blade 421, a lower central shaft 422,
A cross bar 61, a filter element 62, a filter element I621, a filter element II 622, a filter element III 623,
An inverted circular truncated cone 101, a vortex core 102,
A sector plate 111 without holes, a sector plate 112 with a plurality of holes, a small shaft 113,
A vortex stabilizing rod 161, a circular table 162 for blocking powder and a perforation 163.
Detailed Description
The present invention will be described in further detail below by way of examples with reference to the accompanying drawings, which are illustrative of the present invention and are not to be construed as limiting the present invention.
Examples are given.
Referring to fig. 1 to 9, in the present embodiment, the swirl stabilized type multi-stage cyclone coarse powder separator comprises an outer shell 12, an inner cone 14, an inlet pipe 1, an outlet pipe 20 and a powder return pipe 3; the outer shell 12 is sleeved outside the inner cone 14, an annular cavity 13 is formed between the outer shell 12 and the inner cone 14, the lower end of the outer shell 12 is connected with the inlet pipe 1 and the powder return pipe 3, an inner annular cavity 19 is formed between the powder return pipe 3 and the inlet pipe 1, the upper end of the inner cone 14 is connected with the outlet pipe 20, a central cylinder 15 is arranged in the inner cone 14, and a flow guide device 4 is arranged in the inlet pipe 1; the centrifugal compressor comprises an outer shell 12, an inner cone 14, a central cylinder 15 and an inlet pipe 1 which are coaxially arranged, wherein the upper end of the inlet pipe 1 and the upper end of an outlet pipe 20 are both provided with a flaring section 7, the top end of the outer shell 12 is higher than the top end of the inner cone 14, the top end of the inner cone 14 is vertically provided with a plurality of radial baffles 17 which are straight plates or arcs, the radial baffles 17 are uniformly arranged in the circumferential direction, the radial baffles 17 are connected with the top end of the outer shell 12 through adjusting shafts 18, the adjusting shafts 18 are used for adjusting the angles of the radial baffles 17 to generate different centrifugal forces, and the number of the radial baffles is 18; the lower extreme of interior cone 14 is provided with the cone device 10 of preventing mixing that is used for preventing the middlings secondary backward flow that separates, and the lower extreme of preventing mixing the cone device 10 is provided with 2~4 built-in board formula airlockers 9, prevents the blowby, and the below of board formula airlocker 9 is provided with interior cone cap 8, and the flaring cone section 7 of import pipe 1 upper end is just facing interior cone cap 8, and interior cone cap 8 links to each other with board formula airlocker 9, and board formula airlocker 9 link up mutually with the bottom of interior cone 14.
The flow guiding device 4 comprises an upper flow guiding part 41 and a lower flow guiding part 42, and the lower flow guiding part 42 is positioned below the upper flow guiding part 41; the lower guide member 42 includes a lower blade 421 and a lower central shaft 422, and the lower blade 421 is disposed on the lower central shaft 422 and functions to generate a centrifugal force and make a flow field uniform; the upper guide member 41 includes an upper blade 411, an upper central shaft 412 and a stabilizing shaft 413, the upper blade 411 is disposed on the upper central shaft 412, the stabilizing shaft 413 penetrates the upper blade 411 and is connected to the upper central shaft 412, the stabilizing shaft 413 is on the back of the twisted surface of the upper blade 411 and functions to generate centrifugal force; the top end of the upper central shaft 412 is connected with a vortex stabilizing piece 5, the height of the vortex stabilizing piece 5 is not more than the distance between the top end of the upper central shaft 412 and the inner cone cap 8, and the distance is ensured to be between 100mm and 1000 mm; the centrifugal force generating flow guiding device 4 enables the fluid to move upwards in a swirling mode without impacting the inner cone cap 8, and abrasion of the inner cone 14 is reduced.
The lower part of the inner wall of the outer shell 12 is provided with a plurality of small baffles 11 which are uniformly arranged in the circumferential direction, the structure of each small baffle 11 mainly comprises a fan-shaped plate 111 without holes and a fan-shaped plate 112 with a plurality of holes, the small baffles 11 can be fixed on the inner wall of the outer shell 12 through small shafts 113 or can be directly fixed on the inner wall of the outer shell 12, and the number of the small baffles 11 is 12-36.
The upper portion of inner ring cavity 19 is provided with filter equipment 6, and its inner member is circumference align to grid, and filter equipment 6 includes horizontal pole 61 and filter 62, and filter 62 sets up on horizontal pole 61, and filter 62 can be 1~3 little horizontal pole filter I621, also can be the filter II 622 of rice font, can also be the filter III 623 of taking the number shape.
The cone mixing prevention device 10 is composed of an inverted round table 101 and a vortex core piece 102, the upper area of the inverted round table 101 is large, the lower area of the inverted round table is small, the top end of the inverted round table 101 is slightly higher than the bottom end of the inner cone 14, the bottom end of the inverted round table 101 is higher than the top end of the inner cone cap 8, the vortex core piece 102 is vertically arranged in the middle of the top face of the inverted round table 101, and the height of the vortex core piece 102 is larger than 10 mm.
A vortex stabilizing device 16 for preventing the separated coarse powder from flowing back secondarily is arranged in the central cylinder 15, the vortex stabilizing device 16 is arranged coaxially with the central cylinder 15, the vortex stabilizing device 16 only comprises a vortex stabilizing rod 161, a powder blocking circular truncated cone 162 can be arranged on the vortex stabilizing rod 161, and a through hole 163 is arranged on the powder blocking circular truncated cone 162.
The lower end of the powder return pipe 3 is provided with a hand hole 2.
The vortex-stabilizing multi-stage cyclone coarse powder separator adopts an advanced separation concept, adds multi-stage centrifugal separation and a plurality of vortex-stabilizing parts, basically eliminates impact separation, and has higher separation efficiency, higher uniformity index, more uniform outlet concentration and the like; the separator can prevent the soft substance from blocking up by breaking the soft substance and increasing the anti-blocking construction, and the multi-stage centrifugal blades can be flexibly allocated according to the substance attribute and the like, so that the separating and energy-saving effects are achieved. The working method of the vortex-stabilizing multi-stage cyclone coarse powder separator is described as follows:
the first method is as follows: coal powder and airflow enter the inlet pipe 1 at a certain speed, form stable airflow and rotate under the action of the flow guide device 4 in the inlet pipe, generate centrifugal force and break soft substances, the rotating airflow enters the annular cavity 13 through the conical expansion section 7, the thicker coal powder rotates to the inner wall of the outer shell 12 or further rotates to the side wall of the outer shell 12 after passing through the small baffle 11, and then falls into the powder return pipe 3 along the wall surface under the action of gravity; the rest coal dust continuously rises along the annular cavity 13, tangentially enters the radial baffle 17 to generate further rotational flow, and the coal dust is further centrifugally separated; the coarse coal powder is separated along the inner wall of the inner cone 14, the anti-mixing cone device 10 arranged at the lower end of the inner cone 14 prevents the separated coarse powder from flowing back for the second time, the separated coal powder enters the built-in plate type air locker 9, when the materials in the plate type air locker 9 are accumulated to a certain degree, the separated coal powder falls into the powder return pipe 3, and the qualified coal powder is discharged from the outlet pipe 20 through the central cylinder 15; the soft materials or impurities falling and separated from the coarse powder are discharged after passing through a filtering device 6 in the powder returning pipe 3.
The second method comprises the following steps: coal powder and air flow enter the inlet pipe 1 at a certain speed, enter the annular cavity 13 through the expanding cone section 7, pass through the small baffle 11, then rotate the thicker coal powder to the inner wall of the outer shell 12, and fall into the powder return pipe 3 along the wall surface under the action of gravity; the rest coal dust continuously rises along the annular cavity 13, tangentially enters the radial baffle 17 to generate further rotational flow, and the coal dust is further centrifugally separated; the coarse coal powder is separated along the inner wall of the inner cone 14, the anti-mixing cone device 10 arranged at the lower end of the inner cone 14 prevents the separated coarse powder from flowing back for the second time, the separated coal powder enters the built-in plate type air locker 9, when the materials in the plate type air locker 9 are accumulated to a certain degree, the separated coal powder falls into the powder return pipe 3, and the qualified coal powder is discharged from the outlet pipe 20 through the central cylinder 15; the soft materials or impurities falling and separated from the coarse powder are discharged after passing through a filtering device 6 in the powder returning pipe 3.
The third method comprises the following steps: coal powder and air flow enter the inlet pipe 1 at a certain speed, enter the annular cavity 13 through the expanding cone section 7, and the thicker coal powder falls into the powder return pipe 3 along the wall surface under the action of gravity; the rest coal dust continuously rises along the annular cavity 13, tangentially enters the radial baffle 17 to generate further rotational flow, and the coal dust is further centrifugally separated; the coarse coal powder is separated along the inner wall of the inner cone 14, the anti-mixing cone device 10 arranged at the lower end of the inner cone 14 prevents the separated coarse powder from flowing back for the second time, the separated coal powder enters the built-in plate type air locker 9, when the materials in the plate type air locker 9 are accumulated to a certain degree, the separated coal powder falls into the powder return pipe 3, and the qualified coal powder is discharged from the outlet pipe 20 through the central cylinder 15; the soft materials or impurities falling and separated from the coarse powder are discharged after passing through a filtering device 6 in the powder returning pipe 3.
Those not described in detail in this specification are well within the skill of the art.
Although the present invention has been described with reference to the above embodiments, it should be understood that the scope of the present invention is not limited thereto, and that various changes and modifications can be made by those skilled in the art without departing from the spirit and scope of the present invention.
Claims (8)
1. The utility model provides a steady vortex type multistage cyclone coarse powder separator which characterized in that: comprises an outer shell (12), an inner cone (14), an inlet pipe (1), an outlet pipe (20) and a powder return pipe (3); the powder recycling device is characterized in that the outer shell (12) is sleeved outside the inner cone (14), an annular cavity (13) is formed between the outer shell (12) and the inner cone (14), the lower end of the outer shell (12) is connected with the inlet pipe (1) and the powder recycling pipe (3), an inner annular cavity (19) is formed between the powder recycling pipe (3) and the inlet pipe (1), the upper end of the inner cone (14) is connected with the outlet pipe (20), a central cylinder (15) is arranged in the inner cone (14), and a flow guide device (4) is arranged in the inlet pipe (1); outer casing (12), interior cone (14), a center section of thick bamboo (15) and import pipe (1) coaxial arrangement, the upper end of import pipe (1) and the upper end of outlet pipe (20) all are provided with and expand awl section (7), the top of outer casing (12) is higher than the top of interior cone (14), the top of interior cone (14) is provided with a plurality of radial baffle (17) perpendicularly, and is a plurality of radial baffle (17) are circumference align to grid to radial baffle (17) are connected through the top of regulating spindle (18) with outer casing (12), the lower extreme of interior cone (14) is provided with prevents mixing awl device (10), the lower extreme of preventing mixing awl device (10) is provided with board-like airlock (9), the below of board-like airlock (9) is provided with interior cone cap (8).
2. The vortex-stabilized multi-stage cyclone meal separator according to claim 1 wherein: the flow guide device (4) comprises an upper flow guide part (41) and a lower flow guide part (42), and the lower flow guide part (42) is positioned below the upper flow guide part (41); the lower guide member (42) comprises a lower blade (421) and a lower central shaft (422), and the lower blade (421) is arranged on the lower central shaft (422); the upper flow guide part (41) comprises an upper blade (411), an upper central shaft (412) and a stabilizing shaft (413), wherein the upper blade (411) is arranged on the upper central shaft (412), and the stabilizing shaft (413) penetrates through the upper blade (411) and is connected to the upper central shaft (412); the top end of the upper central shaft (412) is connected with a vortex stabilizing piece (5).
3. The vortex-stabilized multi-stage cyclone meal separator according to claim 1 wherein: the lower part of the inner wall of the outer shell (12) is provided with a plurality of small baffles (11) which are uniformly arranged in the circumferential direction.
4. The vortex-stabilized multi-stage cyclone meal separator according to claim 1 wherein: the upper part of the inner ring cavity (19) is provided with a filtering device (6), the filtering device (6) comprises a cross rod (61) and a filtering part (62), and the filtering part (62) is arranged on the cross rod (61).
5. The vortex-stabilized multi-stage cyclone meal separator according to claim 1 wherein: prevent mixing awl device (10) and constitute by inverted round platform (101) and vortex nuclear spare (102), the top of inverted round platform (101) is higher than the bottom of interior cone (14), the bottom of inverted round platform (101) is higher than the top of interior cone cap (8), vortex nuclear spare (102) set up the top surface middle part at inverted round platform (101) perpendicularly, the height of vortex nuclear spare (102) is greater than 10 mm.
6. The vortex-stabilized multi-stage cyclone meal separator according to claim 1 wherein: a vortex stabilizing device (16) is arranged in the central cylinder (15), and the vortex stabilizing device (16) and the central cylinder (15) are coaxially arranged.
7. The vortex-stabilized multi-stage cyclone meal separator according to claim 1 wherein: the lower end of the powder return pipe (3) is provided with a hand hole (2).
8. A method of operating a vortex-stable multi-stage cyclone meal separator as claimed in any one of claims 1 to 7 wherein: the process is as follows: coal powder and air flow enter the inlet pipe (1) at a certain speed, form stable air flow and rotate under the action of a flow guide device (4) in the inlet pipe, generate centrifugal force and break soft substances, the rotating air flow enters the annular cavity (13) through the conical expansion section (7), thicker coal powder rotates to the inner wall of the outer shell (12) or further rotates to the side wall of the outer shell (12) after passing through the small baffle (11), and then falls into the powder return pipe (3) along the wall under the action of gravity; the residual coal powder continuously rises along the annular cavity (13) and tangentially enters the radial baffle (17) to generate further rotational flow, and the coal powder is further centrifugally separated; coarse coal powder is separated along the inner wall of the inner cone (14), the lower end of the inner cone (14) is provided with an anti-mixing cone device (10) for preventing secondary backflow of the separated coarse powder, the separated coal powder enters a built-in plate type air locker (9), when materials in the plate type air locker (9) are accumulated to a certain degree, the separated coal powder falls into a powder return pipe (3) after being opened, and qualified coal powder is discharged from an outlet pipe (20) through a central cylinder (15); the soft materials or impurities falling and separated from the coarse powder are discharged after passing through a filtering device (6) in the powder return pipe (3).
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