CN110906745B - Uniform flow field type high efficiency low resistance cyclone - Google Patents
Uniform flow field type high efficiency low resistance cyclone Download PDFInfo
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- CN110906745B CN110906745B CN201911134347.4A CN201911134347A CN110906745B CN 110906745 B CN110906745 B CN 110906745B CN 201911134347 A CN201911134347 A CN 201911134347A CN 110906745 B CN110906745 B CN 110906745B
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- flow field
- cyclone
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- 238000005520 cutting process Methods 0.000 claims description 3
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims 1
- 235000017491 Bambusa tulda Nutrition 0.000 claims 1
- 241001330002 Bambuseae Species 0.000 claims 1
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims 1
- 239000011425 bamboo Substances 0.000 claims 1
- 239000000428 dust Substances 0.000 abstract description 24
- 239000000463 material Substances 0.000 abstract description 13
- 239000004568 cement Substances 0.000 abstract description 10
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 238000000354 decomposition reaction Methods 0.000 abstract description 4
- 238000005265 energy consumption Methods 0.000 abstract description 3
- 238000000926 separation method Methods 0.000 description 18
- 238000005516 engineering process Methods 0.000 description 6
- 239000007787 solid Substances 0.000 description 6
- 239000000725 suspension Substances 0.000 description 6
- 238000004088 simulation Methods 0.000 description 5
- 238000001354 calcination Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 235000012054 meals Nutrition 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D13/00—Apparatus for preheating charges; Arrangements for preheating charges
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/20—Arrangements for treatment or cleaning of waste gases
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Cyclones (AREA)
Abstract
The invention relates to cement clinker production equipment, in particular to a uniformly distributed flow field type efficient low-resistance cyclone cylinder which comprises a hollow cylinder body formed by a cone, a cylinder and a volute, wherein an air inlet is formed at the end part of the volute, the cement clinker production equipment also comprises an inner cylinder which extends into the cylinder body from top to bottom from the upper end of the volute, the central line of the inner cylinder is provided with a certain offset m relative to the central line of the cylinder along the direction parallel to the tangent line of the volute and the cylinder and far away from the air inlet, and the offset m is 0.02-0.2 times of the inner diameter d1 of the cylinder. The cyclone barrel has reasonable internal flow field, effectively reduces the material external circulation of a kiln tail pre-decomposition system, greatly reduces the dust concentration at the outlet of the preheater, saves the system energy consumption, increases the efficiency of the cyclone barrel to 95%, reduces the dust concentration at the outlet of the preheater to within 60g/Nm 3, and increases the pressure loss by about 100 Pa.
Description
Technical Field
The invention relates to cement clinker production equipment, in particular to a uniformly distributed flow field type efficient low-resistance cyclone cylinder.
Background
The clinker calcining part of the novel dry cement kiln calcining technology mainly comprises a 5-level novel cyclone preheater, an off-kiln pre-decomposition technology (decomposing furnace), a clinker calcining technology (rotary kiln) and a clinker cooling technology (cooler).
The clinker production process is that the material prepared according to a certain proportion is fed from the top of the preheater, preheated by the cyclone preheater, enters the decomposing furnace, is decomposed and then enters the rotary kiln for calcination, and then enters the grate cooler for cooling, and finally the needed clinker is obtained.
It is well known that the suspension preheater is an indispensable part in the production process of novel dry-method cement, is a major breakthrough in the development history of the cement industry, is a core technology of novel dry-method cement, and bears multiple functions of uniform material dispersion, gas-solid separation, gas-solid heat exchange, material conveying and the like. The heat exchange unit of the suspension preheater is mainly a connecting pipeline (also called a heat exchange pipeline) between the cyclone cylinder and each stage of cyclone cylinder. The cyclone is an important unit body of the suspension preheater, has three functions of fully dispersing and uniformly distributing gas and solid phases, rapidly exchanging heat, efficiently separating, and the separation efficiency and the resistance loss are two performance indexes mainly considered in designing the cyclone, and the cyclone is an important unit for forming a suspension preheater system. The heat exchange mode of the preheating process is fundamentally changed, and the contact area between the material and the airflow is greatly increased because the material is suspended in the airflow, so that the heat transfer speed is extremely high, the heat transfer efficiency is very high, and the production efficiency of the cement industry is greatly improved by the suspension preheating technology. However, most of the gas-solid heat exchange process is completed in the heat exchange pipeline.
For the cyclone, the separation efficiency and the pressure loss are important performance indexes, and meanwhile, the cyclone is widely applied to the cement industry due to the advantages of simple structure, high temperature resistance and the like. It is used as both a multistage raw meal suspension preheater and a dust removal device in the cement industry. Meanwhile, according to the prior researches and experience, for a single cyclone separator, indexes for determining the performance quality of the cyclone separator are mainly separation efficiency and resistance loss, and main factors influencing the performance of the cyclone separator are geometrical mechanism parameters of the cyclone separator and physical properties of separated materials.
Disclosure of Invention
According to research, the cyclone can improve heat exchange efficiency and separation efficiency through multistage preheating and dust collection, but resistance exists in each stage of cyclone, the multistage connection increases system resistance, and system power consumption is increased, so that the purposes of improving dust collection efficiency and reducing resistance are achieved by reasonably designing the structure of the cyclone and constructing internal flow field distribution on the premise of not increasing the stages. Based on the discovery, the invention utilizes CFD (computational fluid dynamics) model test to deeply analyze the gas movement characteristics in the cyclone, and improves the gas-solid separation efficiency by optimizing the structural form of the cyclone.
The invention aims to provide a uniformly distributed flow field type efficient low-resistance cyclone cylinder which comprises a hollow cylinder body formed by a cone, a cylinder and a volute which are sequentially and fixedly arranged from bottom to top, wherein the volute is tangentially wrapped on the cylinder by an air inlet pipe along the center of the cylinder, the end part of the volute is provided with an air inlet, the uniformly distributed flow field type efficient low-resistance cyclone cylinder also comprises an inner cylinder which extends from top to bottom to the inside of the cylinder body from the upper end of the volute, the center line of the inner cylinder is provided with a certain offset m relative to the center line of the cylinder along the direction parallel to the tangent line of the volute and the cylinder and far away from the air inlet, the offset m is 0.02-0.2 times of the inner diameter d1 of the cylinder, the lower end of the cone is provided with a discharge hole, and the upper end of the inner cylinder is provided with an air outlet.
Preferably, the inner diameter do of the inner cylinder is 0.45-0.55 times of the inner diameter d1 of the cylinder.
Preferably, the length h0 of the inner cylinder in the cylinder is 0.95-1.15 times the height h4 of the volute.
Preferably, the height h2 of the cylinder is 2.5-5.0 times the length h1 of the inner cylinder in the cylinder.
Preferably, the total length of the top of the volute from the bottom of the cone is 2.5-4.0 times of the inner diameter d1 of the cylinder.
Preferably, the air inlet is pentagonal formed by cutting corners at the lower end of the rectangle, and the wrapping angle of the volute is 240-300 degrees.
Preferably, the chamfer angle alpha of the lower end of the air inlet is 45-60 degrees, and the width w of the upper end of the air inlet is 0.45-0.55 times of the height h4 of the volute.
Preferably, the included angle beta between the outer wall of the cone and the horizontal plane is 45-70 degrees.
Preferably, the discharge opening inner diameter d2 is 0.1-0.3 times of the cylinder inner diameter d 1.
Preferably, the inner diameter d1 of the cylinder is 350 mm to 5500mm, and the offset m is 150mm to 500mm.
According to the technical scheme, through the design of the cyclone inlet, the shape, the position and the size of the inner cylinder, the cyclone flow field is more uniform, the cyclone dust collection efficiency is improved by about 3% -5% on the basis of increasing the pressure loss by 1%, the gas-solid separation efficiency is effectively improved, and the material circulation quantity is reduced. After implementation, the internal flow of the inner barrel of the cyclone is reasonable, so that the material external circulation of a kiln tail pre-decomposition system is effectively reduced, the dust concentration at the outlet of the preheater is greatly reduced, the energy consumption of the system is saved, the efficiency of the cyclone is increased to 95%, the dust concentration at the outlet of the preheater is reduced to within 60g/Nm 3, and the pressure loss is increased by about 100 Pa.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Drawings
The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate the invention and together with the description serve to explain, without limitation, the invention. In the drawings:
FIG. 1 is a schematic diagram of a cyclone barrel in the present invention;
FIG. 2 is a schematic diagram of the offset of the inner barrel of the cyclone;
FIG. 3 is a schematic three-dimensional perspective view of a cyclone;
FIG. 4 is a simulation of the cyclone velocity flow field;
Fig. 5 is a simulation of a layered flow field of a cyclone.
Description of the reference numerals
1 Cone 2 cylinder
3 Volute 4 air inlet
5 Inner cylinder 6 discharge gate
7 Air outlet
Detailed Description
The following describes specific embodiments of the present invention in detail with reference to the drawings. It should be understood that the detailed description and specific examples, while indicating and illustrating the invention, are not intended to limit the invention.
In the present invention, unless otherwise indicated, directional terms such as "upper, lower, inner, side, top" and the like are merely used to denote the orientation of the term in a conventional use state or are commonly understood by those skilled in the art, and should not be construed as limiting the term.
The invention provides a uniformly distributed flow field type efficient low-resistance cyclone barrel which is shown in figures 1-3 and comprises a hollow barrel body formed by a cone 1, a cylinder 2 and a volute 3 which are sequentially and fixedly arranged from bottom to top, wherein the volute 3 is tangentially wrapped on the cylinder 2 along the center of the cylinder 2 by an air inlet pipe, the end part of the volute 3 is provided with an air inlet 4, the uniformly distributed flow field type efficient low-resistance cyclone barrel also comprises an inner barrel 5 which extends from top to bottom to the inside of the barrel body from the upper end of the volute 3, the center line of the inner barrel 5 is provided with a certain offset m relative to the center line of the cylinder 2 along the direction parallel to the tangent line of the volute 3 and the cylinder 2 and far away from the air inlet 4, the offset m is 0.02-0.2 times of the inner diameter d1 of the cylinder 2, the lower end of the cone 1 is provided with a discharge hole 6, and the upper end of the inner barrel 5 is provided with an air outlet 7. The invention discloses a dust collecting cyclone, which is characterized in that the center line of an inner cylinder 5 is provided with a certain offset m relative to the center line of a cylinder 2 along the direction parallel to the tangent line of a volute 3 and the cylinder 2 and far away from an air inlet 4, wherein the offset m is 0.02-0.2 times of the inner diameter d1 of the cylinder 2, namely, the uniformly distributed flow field type high-efficiency low-resistance cyclone adopts the modes of position adjustment of an inner cylinder 5 and the like, so that the tangential speed of the volute tends to be stable, dust-containing gas enters the volute 3 of the cyclone through the air inlet 4, forms high-speed rotational flow downwards spiral motion under the guidance of the volute 3, the dust-containing gas is in a mixed state and moves in the cyclone as a mixed flow, most of materials are collected along the cylinder wall downwards, the subsequent sectional area of the volute 3 is increased through the position adjustment of the inner cylinder 3, the speed flow field is more uniform, dust collection is more facilitated, and the cyclone is improved by 3% -5% compared with the traditional cyclone separation efficiency, namely, the dust collecting efficiency is improved mainly through the increase of the centrifugal moment of materials close to the inner cylinder side through the offset of the inner cylinder. Through CFD simulation verification on the cyclone of the invention, figures 4 and 5 are simulation diagrams of the cyclone velocity flow field, and through CFD simulation, we verify that the cyclone on-way resistance is increased by about 100Pa compared with the conventional cyclone, and the separation efficiency is increased by about 5% compared with the conventional cyclone.
In a preferred embodiment of the present invention, in order to improve the separation efficiency of the cyclone, the inner diameter do of the inner cylinder 5 is 0.45 to 0.55 times the inner diameter d1 of the cylinder 2.
In a preferred embodiment of the invention, in order to increase the separation efficiency of the cyclone, the length h0 of the inner cylinder 5 in the cylinder is 0.95-1.15 times the height h4 of the volute 3.
In a preferred embodiment of the invention, in order to increase the dust separation efficiency and facilitate dust collection and gas turning back, the height h2 of the cylinder 2 is 2.5-5.0 times the length h1 of the inner cylinder 5 in the cylinder.
In a preferred embodiment of the invention, in order to improve the dust separation efficiency, the total length of the top of the volute from the bottom of the cone 1 is 2.5-4.0 times the inner diameter d1 of the cylinder 2.
In a preferred embodiment of the present invention, in order to improve the dust separation efficiency, the air inlet 4 is a pentagon formed by cutting corners at the lower end of a rectangle, and the wrap angle of the scroll 3 is 240 ° -300 °.
In a preferred embodiment of the present invention, in order to improve dust separation efficiency, the chamfer angle α of the lower end of the air inlet 4 is 45 ° to 60 °, and the width w of the upper end of the air inlet 4 is 0.45 to 0.55 times the height h4 of the volute.
In a preferred embodiment of the invention, in order to improve the dust separation efficiency, the included angle beta between the outer wall of the cone 1 and the horizontal plane is 45-70 degrees.
In a preferred embodiment of the invention, the inner diameter d2 of the discharge opening 6 is 0.1 to 0.3 times the inner diameter d1 of the cylinder 2 in order to increase the dust separation efficiency.
In the above technical scheme, the specification of the cyclone can be appropriately adjusted according to the clinker line project, and in a preferred embodiment of the invention, the inner diameter d1 of the cylinder 2 is 350 mm-5500 mm, and the offset m is 150 mm-500 mm.
According to the cyclone dust collection device, through the design of the cyclone inlet, the shape, the position and the size of the inner cylinder, the cyclone flow field is more uniform, the cyclone dust collection efficiency is improved by about 3% -5% on the basis of increasing the pressure loss by 1%, the gas-solid separation efficiency is effectively improved, and the material circulation quantity is reduced. After implementation, the internal flow of the inner barrel of the cyclone is reasonable, so that the material external circulation of a kiln tail pre-decomposition system is effectively reduced, the dust concentration at the outlet of the preheater is greatly reduced, the energy consumption of the system is saved, the efficiency of the cyclone is increased to 95%, the dust concentration at the outlet of the preheater is reduced to within 60g/Nm 3, and the pressure loss is increased by about 100 Pa.
The device is suitable for, but not limited to, a novel dry kiln 2000 t/d-12000 t/d clinker line project.
In the above technical solutions, the description of the manner such as the inner diameter d2 refers to the length d2 of the inner diameter.
The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the specific details of the above embodiments, and various simple modifications can be made to the technical solution of the present invention within the scope of the technical concept of the present invention, and all the simple modifications belong to the protection scope of the present invention.
In addition, the specific features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various possible combinations are not described further.
Moreover, any combination of the various embodiments of the invention can be made without departing from the spirit of the invention, which should also be considered as disclosed herein.
Claims (5)
1. The utility model provides a high-efficient low resistance whirlwind section of thick bamboo of equipartition flow field, its characterized in that includes by cone (1), cylinder (2) and the hollow barrel that volute (3) formed of fixed setting in proper order from bottom to top, wherein, volute (3) are around wrapping on cylinder (2) along the center tangential of cylinder (2) by the air-supply line, and the tip of volute (3) is provided with air intake (4);
The novel vortex tube comprises a cylinder body, and is characterized by further comprising an inner cylinder (5) extending from the upper end of the vortex tube (3) to the inside of the cylinder body from top to bottom, wherein the center line of the inner cylinder (5) is provided with a certain offset m relative to the center line of the cylinder body (2) along the direction parallel to the tangent line of the vortex tube (3) and the cylinder body (2) and far away from an air inlet (4), the offset m is 0.02-0.2 times of the inner diameter d1 of the cylinder body (2), the inner diameter do of the inner cylinder (5) is 0.45-0.55 times of the inner diameter d1 of the cylinder body (2), the length h0 of the inner cylinder (5) in the cylinder body is 0.95-1.15 times of the height h4 of the vortex tube (3), the height h2 of the cylinder body (2) is 2.5-5.0 times of the length h1 of the inner cylinder body in the cylinder body, and the total length of the top of the volute from the bottom of the cone body (1) is 2.5-4.0 times of the inner diameter d 1;
The lower end of the cone (1) is provided with a discharge hole (6), the upper end of the inner cylinder (5) is provided with an air outlet (7), the air inlet (4) is a pentagon formed by cutting corners at the lower end of the rectangle, and the wrapping angle of the volute (3) is 240-300 degrees.
2. The uniformly distributed flow field type efficient low-resistance cyclone according to claim 1, wherein the chamfer angle alpha of the lower end of the air inlet (4) is 45-60 degrees, and the width w of the upper end of the air inlet (4) is 0.45-0.55 times of the height h4 of the volute.
3. The uniformly distributed flow field type efficient low-resistance cyclone according to claim 1, wherein an included angle beta between the outer wall of the cone (1) and the horizontal plane is 45-70 degrees.
4. The uniformly distributed flow field type efficient low-resistance cyclone according to claim 1, wherein the inner diameter d2 of the discharge hole (6) is 0.1-0.3 times of the inner diameter d1 of the cylinder (2).
5. The uniformly distributed flow field type efficient low-resistance cyclone according to any one of claims 1 to 4, wherein the inner diameter d1 of the cylinder (2) is 350 mm to 5500mm, and the offset m is 150mm to 500mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911134347.4A CN110906745B (en) | 2019-11-19 | 2019-11-19 | Uniform flow field type high efficiency low resistance cyclone |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911134347.4A CN110906745B (en) | 2019-11-19 | 2019-11-19 | Uniform flow field type high efficiency low resistance cyclone |
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| Publication Number | Publication Date |
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| CN110906745A CN110906745A (en) | 2020-03-24 |
| CN110906745B true CN110906745B (en) | 2024-12-03 |
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| CN201911134347.4A Active CN110906745B (en) | 2019-11-19 | 2019-11-19 | Uniform flow field type high efficiency low resistance cyclone |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101164485A (en) * | 2006-10-18 | 2008-04-23 | 苏州金莱克家用电器有限公司 | Dust-removing device for vacuum cleaner |
| CN102636036A (en) * | 2012-03-27 | 2012-08-15 | 安徽海螺川崎装备制造有限公司 | Environment-friendly type C-KSV cyclone drum |
| CN210892727U (en) * | 2019-11-19 | 2020-06-30 | 安徽海螺建材设计研究院有限责任公司 | Uniform flow field type high-efficiency low-resistance cyclone |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002159883A (en) * | 2000-11-27 | 2002-06-04 | Hitachi Ltd | Liquid cyclone |
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2019
- 2019-11-19 CN CN201911134347.4A patent/CN110906745B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101164485A (en) * | 2006-10-18 | 2008-04-23 | 苏州金莱克家用电器有限公司 | Dust-removing device for vacuum cleaner |
| CN102636036A (en) * | 2012-03-27 | 2012-08-15 | 安徽海螺川崎装备制造有限公司 | Environment-friendly type C-KSV cyclone drum |
| CN210892727U (en) * | 2019-11-19 | 2020-06-30 | 安徽海螺建材设计研究院有限责任公司 | Uniform flow field type high-efficiency low-resistance cyclone |
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| CN110906745A (en) | 2020-03-24 |
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