CN109158316B - Compact combined powder concentrator for material bed grinding system - Google Patents
Compact combined powder concentrator for material bed grinding system Download PDFInfo
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- CN109158316B CN109158316B CN201811043776.6A CN201811043776A CN109158316B CN 109158316 B CN109158316 B CN 109158316B CN 201811043776 A CN201811043776 A CN 201811043776A CN 109158316 B CN109158316 B CN 109158316B
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- 239000000843 powder Substances 0.000 title claims abstract description 210
- 239000000463 material Substances 0.000 title claims abstract description 59
- 230000003068 static effect Effects 0.000 claims abstract description 87
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims abstract description 22
- 235000017491 Bambusa tulda Nutrition 0.000 claims abstract description 22
- 241001330002 Bambuseae Species 0.000 claims abstract description 22
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims abstract description 22
- 239000011425 bamboo Substances 0.000 claims abstract description 22
- 230000005540 biological transmission Effects 0.000 claims description 13
- 238000007599 discharging Methods 0.000 claims description 9
- 230000007480 spreading Effects 0.000 claims description 6
- 230000007246 mechanism Effects 0.000 claims description 4
- 230000008901 benefit Effects 0.000 abstract description 6
- 239000010419 fine particle Substances 0.000 description 14
- 239000002245 particle Substances 0.000 description 10
- 239000011362 coarse particle Substances 0.000 description 8
- 239000007789 gas Substances 0.000 description 7
- 239000006185 dispersion Substances 0.000 description 6
- 230000001133 acceleration Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000000926 separation method Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000002912 waste gas Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B9/00—Combinations of apparatus for screening or sifting or for separating solids from solids using gas currents; General arrangement of plant, e.g. flow sheets
- B07B9/02—Combinations of similar or different apparatus for separating solids from solids using gas currents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C21/00—Disintegrating plant with or without drying of the material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B11/00—Arrangement of accessories in apparatus for separating solids from solids using gas currents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B11/00—Arrangement of accessories in apparatus for separating solids from solids using gas currents
- B07B11/02—Arrangement of air or material conditioning accessories
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B11/00—Arrangement of accessories in apparatus for separating solids from solids using gas currents
- B07B11/06—Feeding or discharging arrangements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B7/00—Selective separation of solid materials carried by, or dispersed in, gas currents
- B07B7/08—Selective separation of solid materials carried by, or dispersed in, gas currents using centrifugal force
- B07B7/083—Selective separation of solid materials carried by, or dispersed in, gas currents using centrifugal force generated by rotating vanes, discs, drums, or brushes
Landscapes
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Combined Means For Separation Of Solids (AREA)
Abstract
The invention relates to a compact combined powder concentrator for a material bed grinding system, which belongs to the technical field of material powder concentrating equipment and comprises a static powder concentrator and a dynamic powder concentrator, wherein the static powder concentrator is in a bamboo hat shape, and is arranged above the dynamic powder concentrator; the static powder selecting machine comprises a shell I, a feeding pipe, a powder selecting device and a supporting framework; the lower part of the feed pipe is provided with a forced scattering device, the powder selecting device is in a circular truncated cone shape, the powder selecting device consists of a plurality of static scattering blades which are sequentially overlapped in a bamboo hat shape, and a passage for gas and materials to pass through is arranged between two adjacent static scattering blades; the dynamic powder selecting machine comprises a second shell, a rotor, static blades, an air inlet, a fine powder hopper, a middling powder hopper and a coarse powder hopper; the stationary blades are obliquely arranged along the rotation direction of the rotor, and the air inlet is positioned on the side surface of the upper part of the dynamic powder concentrator. Compared with the traditional combined powder concentrator, the combined powder concentrator has the advantage that the height of the powder concentrator can be reduced by 36-46%.
Description
Technical Field
The invention belongs to the field of material powder selecting equipment, and particularly relates to two-stage powder selecting equipment suitable for a material bed grinding system with large circulation quantity.
Background
The combined powder concentrator combining the static powder concentrator and the dynamic powder concentrator is widely applied to grinding systems of a roller press, a barrel roller mill and a full external circulation vertical mill, and particularly the roller press final grinding system is widely applied to the production process of cement raw materials. The traditional powder concentrator mostly adopts two-stage separation consisting of a V-shaped powder concentrator and a dynamic powder concentrator with lower air inlet, so that powder concentration of a grinding system with large cyclic load is realized; the feeding concentration of the dynamic powder concentrator is greatly reduced after the primary separation of the V-shaped powder concentrator, and the powder concentrating efficiency is ensured.
However, as the specification and model of the V-type static powder concentrator are increased, the width of the V-type static powder concentrator is increased to a smaller extent, while the height is increased to a larger extent, mainly because the dispersibility of the material in the width direction is considered to be inferior to that in the height direction.
Taking a cement production line as an example, along with the increasing of the scale of the production line, the defects of a combined powder concentrator consisting of a V-shaped static powder concentrator and a dynamic powder concentrator of a roller press final grinding system are also more and more obvious. The height of the combined powder concentrator is higher and higher, and the equipment investment and civil engineering investment brought by the combined powder concentrator are greatly increased; the requirements of a high-yield roller press finish grinding system on a lifter are more and more severe, the lifter can achieve high lifting height under the condition of high lifting capacity, and the requirements on the design of chains and transmission of the lifter are high. In the early designs, in order to reduce the height of the elevator, a double elevator design scheme was adopted, and although the height of a single elevator was reduced, the total investment of equipment was greatly increased. Therefore, it becomes necessary to design a compact combined powder concentrator with a greatly reduced height.
Disclosure of Invention
Aiming at the problems existing in the prior art, the invention provides a compact combined powder concentrator for a material bed grinding system, and compared with a combined powder concentrator consisting of a traditional V-shaped static powder concentrator and a dynamic powder concentrator, the combined powder concentrator has the advantage that the height of the combined powder concentrator can be reduced by 36-46% under the condition that the rotor height is 2500mm and the rotor diameter is 4100 mm.
The invention is realized in such a way that a compact combined powder concentrator for a material bed grinding system comprises a static powder concentrator and a dynamic powder concentrator, and is characterized in that: the static powder selector is in a bamboo hat shape, and is arranged above the dynamic powder selector;
The static powder selecting machine comprises a shell I, a feeding pipe, a powder selecting device and a supporting framework; the first shell is conical in shape, the feeding pipe is arranged at the top of the static powder selecting machine, the forced material scattering device is arranged at the lower part of the feeding pipe, the forced material scattering device and the dynamic powder selecting machine share a transmission shaft, the transmission shaft is driven by the transmission mechanism to rotate, and the forced material scattering device is positioned at the top of the powder selecting device; the powder selecting device is in a truncated cone shape and consists of a plurality of static scattering blades which are sequentially overlapped in a bamboo hat shape, a channel for passing gas and materials is arranged between two adjacent static scattering blades, and the plurality of static scattering blades are arranged on a supporting framework;
The dynamic powder selecting machine comprises a second shell, a rotor, static blades, an air inlet, a fine powder hopper, a middling powder hopper and a coarse powder hopper; the shape of casing two is the shape of falling round platform, the top of casing two is connected with the bottom of selecting powder device, the rotor is installed on the transmission shaft, the stator blade sets up in the periphery of rotor and install in the annular frame with casing two fixed connection, the stator blade is arranged along rotor direction of rotation slope, the air intake is located dynamic powder concentrator's upper portion side, the top and the inside intercommunication of rotor of fine powder hopper, the bottom and the lower outlet channel intercommunication of fine powder hopper, the top and the bottom of casing two of middling hopper are connected, the material passageway intercommunication between middling hopper and the shell one and the powder device through the air inlet channel of air intake.
The material entering the feeding pipe enters a dispersion powder selecting area of a powder selecting device composed of static scattering blades which are arranged in a bamboo hat shape under the action of a forced material scattering device, the material is dispersed towards the lower edge of the powder selecting device along the static scattering blades which are arranged in the bamboo hat shape, in the process of collision and dispersion of the material and the static scattering blades, fine particles are blown into the powder selecting device by gas flowing from the outer edge of the powder selecting device to the interior of the powder selecting device, and coarse particles continuously drop downwards step by step along the static scattering blades and are selected again; coarse particles fall off and leave static scattering blades arranged in a bamboo hat shape to enter an air inlet channel of the air inlet, and the coarse particles passing through the air inlet channel finally fall into a conical coarse powder hopper at the bottom and are discharged out of the powder selecting machine through an air locking device at the bottom of the conical coarse powder hopper; fine particles brought into the powder selecting device by gas enter a gradually reduced air duct surrounded by the second shell and the stationary blades from the top of the dynamic powder selecting machine; fine particles enter stationary blades of the dynamic powder concentrator from the air duct, and the particles accelerated by the obliquely arranged stationary blades flow along the rotating direction of the rotor; fine particles are sucked into a rotor after air flow is accelerated, the fine particles sucked into the rotor enter finished product collecting equipment (cyclone and dust collector) along with air from a lower air outlet pipeline of the dynamic powder concentrator, powder-selecting waste gas is discharged through a draught fan, coarse particles are accelerated by the rotor for the second time and then are decelerated by stationary blades, finally slide to a middling powder hopper, and the fine particles are discharged out of the powder concentrator through a locking device at the bottom of the middling powder hopper.
In the above technical solution, preferably, the static scattering blades are gradually arranged in an encrypting manner along the flow direction of the material from the top of the powder selecting device to the lower edge. When the material layer at the top is thicker, the vertical drop between the static scattering blades is the largest, so that the acceleration of particles of the thick material layer is facilitated, the particles are dispersed more and more sufficiently when the particles are closer to the lower edge of the round table, the particles are encrypted along with the static scattering blades, the vertical drop is also gradually the smallest, the residence time of the static scattering blades can be prolonged, and the separation of fine particles is facilitated.
In the above technical solution, preferably, the upper portion of the forced spreading device is conical, and a discharging rake nail may be disposed on the conical surface of the forced spreading device.
In the above technical scheme, preferably, the included angle between the static scattering blade and the side edge of the powder selecting device is 15-25 degrees
In the above technical solution, preferably, the included angle between the side edge and the bottom edge of the powder selecting device is 45 ° to 60 °.
In the above technical solution, preferably, the included angle between the side edge of the first housing and the side edge of the powder selecting device is 2 ° to 6 °.
When the water content of the material is large and the fluidity is worst, the included angle between the side edge and the bottom edge of the powder selecting device is designed to be 60 degrees, and a forced discharging harrow pin is added on the conical surface of the forced material scattering device; in order to ensure that the material can smoothly flow, the included angle between the static scattering blade and the side edge of the powder selecting device is 20 degrees; the included angle between the side edge of the conical air duct shell I and the side edge of the powder selecting device is designed to be 2 degrees, at the moment, the included angle between the side edge of the static scattering blade and the side edge of the conical air duct shell I is minimum and is 17 degrees, and the small included angle can ensure larger vector wind speed and has stronger sorting capability;
When the moisture of the material is small and the fluidity is good, the included angle between the side edge and the bottom edge of the powder selecting device is designed to be 45 degrees, and the conical surface of the forced material scattering device is not designed with a forced discharging harrow pin; in order to ensure that the materials can have certain residence time, the included angle between the static scattering blades and the side edge of the powder selecting device is 25 degrees; the included angle between the side edge of the conical air duct shell I and the side edge of the powder selecting device is designed to be 6 degrees, at the moment, the included angle between the static scattering blade and the side edge of the conical air duct shell I is the largest and is 31 degrees, and a small vector wind speed can be ensured by a large included angle, so that the sorting capability is the weakest;
different design parameters correspond to materials with different characteristics, and the equipment investment is minimized under the condition of ensuring the equipment performance.
In the above technical solution, preferably, the inclination angle of the stator blade is adjustable, and the inclination angle is 55 ° to 65 °. The stator blades are obliquely arranged, so that a necking is formed between the two stator blades, the effect of a Laval pipe is achieved, and a certain acceleration effect is achieved on the passing airflow.
In the above technical scheme, preferably, the bottom discharge openings of the middling hopper and the coarse powder hopper are respectively provided with a locking wind device. Preventing unwanted air from leaking in from the bottom feed opening.
In the above technical solution, preferably, according to the requirement of the powder selecting specification, the air inlet may be a single air inlet, a double air inlet, a triple air inlet or a quadruple air inlet.
The invention has the advantages and positive effects that:
1) The bamboo hat type static powder concentrator provided by the invention has the advantages that the external dimension of the static powder concentrator can be designed according to the flow characteristics of materials, so that the bamboo hat type static powder concentrator has good adaptability to the materials with different characteristics;
2) The invention designs a forced discharging device to ensure that the material can uniformly enter a static powder selecting area;
3) The dynamic powder concentrator adopts the upper air inlet and the lower air outlet, so that the bamboo hat type static powder concentrator and the dynamic powder concentrator are compactly combined, and compared with the combined powder concentrator with the same rotor specification at present, the height of the dynamic powder concentrator can be reduced by 36-46%, and the reduction of the equipment height can bring about the substantial reduction of civil engineering investment and equipment investment, thereby having considerable economic and social benefits.
Drawings
Fig. 1 is a schematic structural diagram of a combined powder concentrator provided in an embodiment of the present invention;
FIG. 2 is a side view of FIG. 1;
FIG. 3 is a top view of FIG. 1;
Fig. 4 is a schematic structural view of a static powder concentrator provided by an embodiment of the present invention, wherein the static powder concentrator is arranged at 60 degrees;
FIG. 5 is a top view of FIG. 4;
Fig. 6 is a schematic structural view of a static powder concentrator provided by an embodiment of the present invention, wherein the static powder concentrator is arranged at 45 degrees;
FIG. 7 is a schematic view of a stator blade and a rotor blade of a dynamic powder concentrator according to an embodiment of the present invention;
FIG. 8 is a cross-sectional view A-A of the vane of FIG. 7;
fig. 9 is a gas flow chart of the combined powder concentrator provided by the embodiment of the invention;
Fig. 10 is a material flow diagram of a combined powder concentrator according to an embodiment of the present invention.
In the figure: 1-shell I, 2-feeding pipe, 3-static scattering blade, 4-forced scattering device, 41-discharging harrow nail, 5-shell II, 6-rotor, 7-stator blade, 8-air inlet, 9-fine powder hopper, 10-middling hopper, 11-coarse powder hopper, 12-lower air outlet pipeline, 13-transmission shaft, 14-transmission mechanism and 15-air locking device.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail below with reference to the examples and the accompanying drawings. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "upper", "lower", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "connected," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Referring to fig. 1 to 8, the present embodiment provides a compact combined powder concentrator for a material bed grinding system, which includes a static powder concentrator and a dynamic powder concentrator, wherein the static powder concentrator is in a bamboo hat shape, and the static powder concentrator is arranged above the dynamic powder concentrator;
The static powder selecting machine comprises a shell I, a feeding pipe, a powder selecting device and a supporting framework; the first shell is conical, the feeding pipe is arranged at the top of the static powder selecting machine, the lower part of the feeding pipe is provided with a forced material scattering device, the forced material scattering device and the dynamic powder selecting machine share a transmission shaft, the transmission shaft is driven by a transmission mechanism to rotate, and the forced material scattering device is positioned at the top of the powder selecting device; the powder selecting device is in a truncated cone shape and consists of a plurality of static scattering blades which are sequentially overlapped in a bamboo hat shape, a passage for gas and materials to pass through is arranged between two adjacent static scattering blades, and the plurality of static scattering blades are arranged on the supporting framework;
The dynamic powder selecting machine comprises a second shell, a rotor, static blades, an air inlet, a fine powder hopper, a middling powder hopper and a coarse powder hopper; the shape of the second shell is an inverted circular table, the top end of the second shell is connected with the bottom end of the powder selecting device, the rotor is arranged on the transmission shaft, the static blades are arranged on the periphery of the rotor and are arranged in an annular frame fixedly connected with the second shell, the static blades are obliquely arranged along the rotation direction of the rotor, the air inlet is positioned on the side surface of the upper part of the dynamic powder selecting machine, the top end of the fine powder hopper is communicated with the inside of the rotor, the bottom end of the fine powder hopper is communicated with the lower air outlet pipeline, the top end of the coarse powder hopper is connected with the bottom end of the second shell, and the coarse powder hopper is communicated with the material channel between the first shell and the powder selecting device through an air inlet channel of the air inlet.
Referring to fig. 9 and 10, the material entering the feeding pipe enters a dispersion powder selecting area of a powder selecting device composed of static scattering blades arranged in a bamboo hat shape under the action of a forced scattering device, the material is dispersed towards the lower edge of the powder selecting device along the static scattering blades arranged in the bamboo hat shape, in the process of collision dispersion of the material and the static scattering blades, fine particles are blown into the powder selecting device by gas flowing from the outer edge of the powder selecting device towards the interior of the powder selecting device, and coarse particles continuously drop downwards step by step along the static scattering blades and are selected again; coarse particles fall off and leave static scattering blades arranged in a bamboo hat shape to enter an air inlet channel of the air inlet, and the coarse particles passing through the air inlet channel finally fall into a conical coarse powder hopper at the bottom and are discharged out of the powder selecting machine through an air locking device at the bottom of the conical coarse powder hopper; fine particles brought into the powder selecting device by gas enter a gradually reduced air duct surrounded by the second shell and the stationary blades from the top of the dynamic powder selecting machine; fine particles enter stationary blades of the dynamic powder concentrator from the air duct, and the particles accelerated by the obliquely arranged stationary blades flow along the rotating direction of the rotor; fine particles are sucked into a rotor after air flow is accelerated, the fine particles sucked into the rotor enter finished product collecting equipment (cyclone and dust collector) along with air from a lower air outlet pipeline of the dynamic powder concentrator, powder-selecting waste gas is discharged through a draught fan, coarse particles are accelerated by the rotor for the second time and then are decelerated by stationary blades, finally slide to a middling powder hopper, and the fine particles are discharged out of the powder concentrator through a locking device at the bottom of the middling powder hopper.
As a preferred embodiment, the static scattering blades are gradually arranged in an encryption manner along the flow direction of the material from the top of the powder selecting device to the lower edge. When the material layer at the top is thicker, the vertical drop between the static scattering blades is the largest, so that the acceleration of particles of the thick material layer is facilitated, the particles are dispersed more and more sufficiently when the particles are closer to the lower edge of the round table, the particles are encrypted along with the static scattering blades, the vertical drop is also gradually the smallest, the residence time of the static scattering blades can be prolonged, and the separation of fine particles is facilitated.
As a preferred embodiment, the upper part of the forced spreading device is conical, and the conical surface of the forced spreading device can be provided with a discharging harrow nail.
As a preferred embodiment, the included angle between the static scattering blade and the side edge of the powder selecting device is 15-25 degrees.
As a preferred embodiment, the included angle between the side edge and the bottom edge of the powder selecting device is 45-60 degrees.
As a preferred embodiment, the included angle between the side edge of the first shell and the side edge of the powder selecting device is 2-6 degrees.
When the water content of the material is large and the fluidity is worst, the included angle between the side edge and the bottom edge of the powder selecting device is designed to be 60 degrees, the conical surface of the forced material scattering device is additionally provided with a forced discharging harrow nail, and the specific design is shown in fig. 4; in order to ensure that the material can smoothly flow, the included angle between the static scattering blade and the side edge of the powder selecting device is 15 degrees; the included angle between the side edge of the conical air duct shell I and the side edge of the powder selecting device is designed to be 2 degrees, at the moment, the included angle between the side edge of the static scattering blade and the side edge of the conical air duct shell I is minimum and is 17 degrees, and the small included angle can ensure larger vector wind speed and has stronger sorting capability.
When the moisture of the material is small and the fluidity is good, the included angle between the side edge and the bottom edge of the powder selecting device is designed to be 45 degrees, the conical surface of the forced material scattering device is not designed with a forced discharging harrow nail, and the specific design is shown in fig. 6; in order to ensure that the materials can have certain residence time, the included angle between the static scattering blades and the side edge of the powder selecting device is 25 degrees; the included angle between the side edge of the conical air duct shell I and the side edge of the powder selecting device is designed to be 6 degrees, at the moment, the included angle between the static scattering blade and the side edge of the conical air duct shell I is the largest and is 31 degrees, and a small vector wind speed can be guaranteed due to a large included angle, and the sorting capability is the weakest.
Different design parameters correspond to materials with different characteristics, and the equipment investment is minimized under the condition of ensuring the equipment performance.
As a preferred embodiment, the inclination angle of the stator blades is adjustable, the inclination angle being 55 DEG to 65 DEG, more preferably 62 deg. The stator blades are obliquely arranged, so that a necking is formed between the two stator blades, the effect of a Laval pipe is achieved, and a certain acceleration effect is achieved on the passing airflow.
As a preferred embodiment, the middlings hopper and the bottom discharge hole of the middlings hopper are provided with air locking devices. Preventing unwanted air from leaking in from the bottom feed opening.
As a preferred embodiment, the air inlet may be a single air inlet, a double air inlet, a triple air inlet or a four air inlet, according to the requirements of the powder selecting specification. In this embodiment, a double air inlet is adopted, and the air enters the conical air duct housing one after passing through the volute-shaped air inlet duct.
The parameters of the bamboo hat type static powder concentrator and the existing V type static powder concentrator (TAS-410) are compared with each other in Table 1:
TABLE 1
Note that: the dispersing area of the bamboo hat type static powder selecting machine is the surface area of the round table side of the powder selecting device.
As can be seen from table 1, the parameters of the V-shaped static powder concentrator matched with the dynamic powder concentrator with the rotor diameter of 4100mm and the height of 2500mm are compared, and when the included angle between the side edge and the bottom edge of the powder concentrator is 45 degrees, the dispersion area of the bamboo hat-shaped static powder concentrator is about 1.46 times of that of the V-shaped static powder concentrator; when the included angle between the side edge and the bottom edge of the powder selecting device is 60 degrees, the dispersing area of the bamboo hat type static powder selecting machine is about 2.13 times of that of the V type static powder selecting machine; the design of the bamboo hat type static powder selector is superior to that of the V type static powder selector in terms of the dispersion area.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments may be modified or some or all of the technical features may be replaced equivalently, and these modifications or replacements do not make the essence of the corresponding technical scheme deviate from the scope of the technical scheme of the embodiments of the present invention.
Claims (9)
1. A compact combination formula selection powder machine for material bed grinding system, includes static selection powder machine and dynamic selection powder machine, its characterized in that: the static powder selector is in a bamboo hat shape, and is arranged above the dynamic powder selector;
The static powder selecting machine comprises a shell I, a feeding pipe, a powder selecting device and a supporting framework; the first shell is conical in shape, the feeding pipe is arranged at the top of the static powder selecting machine, the forced material scattering device is arranged at the lower part of the feeding pipe, the forced material scattering device and the dynamic powder selecting machine share a transmission shaft, the transmission shaft is driven by the transmission mechanism to rotate, and the forced material scattering device is positioned at the top of the powder selecting device; the powder selecting device is in a truncated cone shape and consists of a plurality of static scattering blades which are sequentially overlapped in a bamboo hat shape, a channel for passing gas and materials is arranged between two adjacent static scattering blades, and the plurality of static scattering blades are arranged on a supporting framework;
The dynamic powder selecting machine comprises a second shell, a rotor, static blades, an air inlet, a fine powder hopper, a middling powder hopper and a coarse powder hopper; the shape of casing two is the shape of falling round platform, the top of casing two is connected with the bottom of selecting powder device, the rotor is installed on the transmission shaft, the stator blade sets up in the periphery of rotor and install in the annular frame with casing two fixed connection, the stator blade is arranged along rotor direction of rotation slope, the air intake is located dynamic powder concentrator's upper portion side, the top and the inside intercommunication of rotor of fine powder hopper, the bottom and the lower outlet channel intercommunication of fine powder hopper, the top and the bottom of casing two of middling hopper are connected, the material passageway intercommunication between middling hopper and the shell one and the powder device through the air inlet channel of air intake.
2. The compact combination powder concentrator for a bed grinding system of claim 1, wherein: the static scattering blades are gradually arranged in an encryption mode along the flow direction of the material from the top of the powder selecting device to the lower edge.
3. The compact combination powder concentrator for a bed grinding system of claim 1, wherein: the upper part of the forced spreading device is conical, and the conical surface of the forced spreading device is provided with a discharging harrow nail.
4. The compact combination powder concentrator for a bed grinding system of claim 1, wherein: the included angle between the static scattering blade and the side edge of the powder selecting device is 15-25 degrees.
5. The compact combination powder concentrator for a bed grinding system of claim 1, wherein: the included angle between the side edge and the bottom edge of the powder selecting device is 45-60 degrees.
6. The compact combination powder concentrator for a bed grinding system of claim 1, wherein: the included angle between the side edge of the first shell and the side edge of the powder selecting device is 2-6 degrees.
7. The compact combination powder concentrator for a bed grinding system of claim 1, wherein: the inclination angle of the stator blade can be adjusted, and the inclination angle is 55-65 degrees.
8. The compact combination powder concentrator for a bed grinding system of claim 1, wherein: and the bottom discharge holes of the middling hopper and the coarse powder hopper are respectively provided with a locking wind device.
9. The compact combination powder concentrator for a bed grinding system of claim 1, wherein: the air inlet adopts a single air inlet, a double air inlet, a three air inlet or a four air inlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| CN111112077A (en) * | 2019-12-30 | 2020-05-08 | 嘉兴新博信息科技有限公司 | Rotor type metal mineral powder selecting machine |
| CN113351480B (en) * | 2021-05-13 | 2022-05-03 | 天津水泥工业设计研究院有限公司 | Two-stage dynamic rotor powder concentrator capable of adjusting grain size grading of finished products |
| CN113369140B (en) * | 2021-07-20 | 2022-06-21 | 天津水泥工业设计研究院有限公司 | Design method of superfine powder concentrator based on thickness separation of semi-finished products |
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| CN113953064B (en) * | 2021-10-18 | 2023-04-14 | 天津水泥工业设计研究院有限公司 | Self-sorting ball mill and application thereof |
| CN113953065B (en) * | 2021-10-18 | 2023-04-14 | 天津水泥工业设计研究院有限公司 | Combined grinding system with pre-grinding equipment |
| CN113953062B (en) * | 2021-10-18 | 2023-04-14 | 天津水泥工业设计研究院有限公司 | Self-sorting ball milling system for grinding superfine materials |
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