CN111515129A - Novel adjusting coarse powder separator and working method - Google Patents
Novel adjusting coarse powder separator and working method Download PDFInfo
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- CN111515129A CN111515129A CN202010284729.1A CN202010284729A CN111515129A CN 111515129 A CN111515129 A CN 111515129A CN 202010284729 A CN202010284729 A CN 202010284729A CN 111515129 A CN111515129 A CN 111515129A
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- 239000000843 powder Substances 0.000 title claims abstract description 63
- 238000000034 method Methods 0.000 title claims abstract description 20
- 230000008676 import Effects 0.000 claims abstract description 26
- 239000003245 coal Substances 0.000 claims description 51
- 230000003750 conditioning effect Effects 0.000 claims description 30
- 239000002245 particle Substances 0.000 claims description 24
- 239000011362 coarse particle Substances 0.000 claims description 18
- 239000012535 impurity Substances 0.000 claims description 18
- 230000001105 regulatory effect Effects 0.000 claims description 17
- 230000009471 action Effects 0.000 claims description 12
- 238000000227 grinding Methods 0.000 claims description 12
- 238000000926 separation method Methods 0.000 claims description 12
- 235000012054 meals Nutrition 0.000 claims description 9
- 230000008569 process Effects 0.000 claims description 6
- 239000000126 substance Substances 0.000 claims description 6
- 239000007787 solid Substances 0.000 claims description 4
- 125000004122 cyclic group Chemical group 0.000 claims 1
- 239000010813 municipal solid waste Substances 0.000 claims 1
- 238000000746 purification Methods 0.000 claims 1
- 238000007664 blowing Methods 0.000 abstract description 3
- 238000010298 pulverizing process Methods 0.000 abstract description 3
- 239000002817 coal dust Substances 0.000 description 9
- 239000003034 coal gas Substances 0.000 description 4
- 238000011144 upstream manufacturing Methods 0.000 description 4
- 238000002485 combustion reaction Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004939 coking Methods 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
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- 238000007789 sealing Methods 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
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- 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
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
- B02C23/18—Adding fluid, other than for crushing or disintegrating by fluid energy
- B02C23/24—Passing gas through crushing or disintegrating zone
- B02C23/32—Passing gas through crushing or disintegrating zone with return of oversize material to crushing or disintegrating zone
-
- 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
- B07B7/06—Selective separation of solid materials carried by, or dispersed in, gas currents by impingement against sieves
-
- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23K—FEEDING FUEL TO COMBUSTION APPARATUS
- F23K3/00—Feeding or distributing of lump or pulverulent fuel to combustion apparatus
- F23K3/02—Pneumatic feeding arrangements, i.e. by air blast
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23K—FEEDING FUEL TO COMBUSTION APPARATUS
- F23K2201/00—Pretreatment of solid fuel
- F23K2201/30—Separating
Abstract
The invention relates to a novel adjusting coarse powder separator and a working method thereof, which are used for a direct-blowing pulverizing system of a coal-fired power plant. The invention comprises an inner cone and an outer shell, wherein the inner cone is arranged in the outer shell, an annular channel is formed between the inner cone and the outer shell, and the structure is characterized in that: still include import pipe, edulcoration grid, whirl device, shutter, axial blade, adjusting baffle, outlet pipe, central wheel hub, coarse grain outlet pipe and control chamber, the axial blade is installed in the annular passage, import pipe and shutter intercommunication, shutter and coarse grain outlet pipe are all installed in the bottom of shell body and all communicate with the shell body, edulcoration grid and whirl device are all installed in the import pipe, the control chamber is installed at the top of shell body and is communicated with the shell body, adjusting baffle installs in the control chamber through central wheel hub, the outlet pipe install on the control chamber, and communicate with the control chamber.
Description
Technical Field
The invention relates to a novel adjusting coarse powder separator and a working method thereof, which are used for a direct-blowing pulverizing system of a coal-fired power plant.
Background
In a coal-fired power plant, factors influencing boiler combustion are many, and the air quantity and the coal powder uniformity of a combustor are one of main factors. Each combustor must be matched with a corresponding combustor, and good symmetry is achieved, so that good combustion can be organized, and the air volume and the pulverized coal of the corresponding combustor are required to have good uniformity. The powder quantity distribution characteristic of the powder feeding pipeline has great influence on the safe, economical and reliable operation of the boiler, uneven powder quantity distribution can cause unstable combustion and even extinguishment, burner burning loss, coking in the boiler, high-temperature corrosion and over-temperature of a water-cooled wall, and the risk of non-stop of a unit is increased. This requires relatively uniform introduction of pulverized coal into the pulverized coal feed duct.
The air quantity and the coal quantity in the direct-blowing pulverizing system are generally regulated before entering a coal mill, gas-solid phases flow in the coal mill in a complex way, pulverized coal at the outlet of the coal mill is not uniformly distributed, and after entering a separator, a baffle of the separator is blocked by impurities, so that the air powder is more non-uniform, and the distribution of the powder quantity of a powder conveying pipeline at the outlet of the coal mill generates great deviation. The pulverized coal is screened by the coarse powder separator, and qualified pulverized coal directly enters the combustor through the outlet pipe and the pulverized coal pipeline, so that the importance of whether the air-powder content at the outlet of the coarse powder separator is uniform or not is achieved. The powder quantity of an outlet pipe of the existing coarse powder separator is not uniform, and the powder quantity is adjusted by adjusting shrinkage cavities of a coal powder pipeline, so that the resistance of a system is increased, and unnecessary pressure loss is caused. In order to solve the problem of coal powder distribution deviation caused by uneven resistance of pipelines, resistance elements such as throttling orifice plates are adopted to balance the resistance deviation between the pipelines both abroad and domestically. In fact, the positive effect of the adjustment is slight and often also leads to undesirable consequences. For example, the air volume in a powder conveying pipeline with a large amount of pulverized coal is always small, the resistance of the pipeline needs to be further increased artificially to control the flow of the pulverized coal, the air volume is inevitably smaller, the pulverized coal conveying of the pipeline is difficult, and pulverized coal deposition and pipe blockage accidents are caused. Any resistance adjustment in the pulverized coal duct will affect both the pulverized coal flow and the air flow, which is contradictory in practice. Since in practice it is not possible to have the requirement to turn the coal dust and the air flow rate up or down at the same time.
The axial coarse powder separator adopted by the coal-fired power plant at present has wide application in industrial separation. The separator mainly comprises a riser inlet, an internal hollow cone, a separator external conical shell, a coarse coal powder return pipe, an upper baffle, a lower baffle, a separator top cover and an outlet pipe. The problem that the deviation of the powder quantity at the outlet of the separator is large generally exists.
In view of this, patent document CN204544762U discloses an axial type coarse powder separator.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides a novel coarse powder adjusting separator which is reasonable in structural design and uniform in outlet air quantity and a working method thereof in order to solve the problem that the deviation of the powder quantity at the outlet of the conventional coarse powder separator is large.
The technical scheme adopted by the invention for solving the problems is as follows: this novel adjust middlings separator, including interior cone and shell body, interior cone installs in the shell body, form annular channel between interior cone and the shell body, its structural feature lies in: still include import pipe, edulcoration grid, whirl device, shutter, axial blade, adjusting baffle, outlet pipe, central wheel hub, coarse grain outlet pipe and control chamber, the axial blade is installed in the annular passage, import pipe and shutter intercommunication, shutter and coarse grain outlet pipe are all installed in the bottom of shell body and all communicate with the shell body, edulcoration grid and whirl device are all installed in the import pipe, the control chamber is installed at the top of shell body and is communicated with the shell body, adjusting baffle installs in the control chamber through central wheel hub, the outlet pipe install on the control chamber, and communicate with the control chamber.
Furthermore, the one end of import pipe is the setting of horn mouth column structure, and has the distance between this end and the interior cone, the other end of import pipe is exposed in the shell body, the edulcoration grid is located the upper reaches of whirl device, the shutter is located the low reaches of whirl device.
Furthermore, the adjusting baffle is of a fixed structure, the central hub is of an annular hollow structure, one end of the adjusting baffle is fixed with the central hub, and the other end of the adjusting baffle is fixed with the inner wall of the adjusting chamber.
Furthermore, the novel coarse powder adjusting separator further comprises a flow distribution plate and a flow distribution shaft, the flow distribution plate is fixed with the flow distribution shaft, the flow distribution shaft is installed on the adjusting chamber, the flow distribution plate is matched with the outlet pipe, the adjusting baffle plates are arranged in a circumferential array along the axis of the central hub, and the adjusting baffle plates are arranged perpendicular to the horizontal plane.
Further, novel adjust middlings separator still includes flow control board, flow control axle and flow control handle, flow control board is fixed with the flow control axle, the sealed axle sleeve that is equipped with of flow control axle overcoat, sealed axle sleeve is installed on the lateral wall of regulating chamber, the one end rotation of flow control axle is installed on central wheel hub, the other end and the flow control handle of flow control axle are fixed, flow control board and outlet pipe cooperation, adjusting baffle's quantity is a plurality of, and a plurality of adjusting baffle symmetry sets up, adjusting baffle arranges with the horizontal plane is perpendicular, flow control board can 360 rotate.
Further, adjusting the baffle is the rotation type structure, novel adjust the middlings separator still includes the wheel hub drive shaft, central wheel hub's upper end is connected with the one end of wheel hub drive shaft, the other end and the drive arrangement of wheel hub drive shaft are connected, central wheel hub's lower extreme is solid circular-arc structure setting, adjusting the baffle's one end is fixed with central wheel hub, there is the clearance between adjusting the baffle's the other end and the inner wall of control room.
Further, the number of the adjusting baffles is multiple, the adjusting baffles are unevenly distributed along the axis of the central hub, or the adjusting baffles are concentrated on an even part on one side of the central hub, and the adjusting baffles are arranged perpendicular to the horizontal plane.
Furthermore, the quantity of adjusting the baffle is a plurality of, and a plurality of adjusting the baffle along center wheel hub's axis evenly distributed, wherein a plurality of center wheel hub one side adjusting the baffle that is located is arranged with the horizontal plane is perpendicular, and a plurality of center wheel hub opposite side adjusting the baffle that is located has the contained angle with the horizontal plane between.
Further, the outer shell is of a hollow structure, the middle of the outer shell is of a cylindrical structure, and the upper portion of the outer shell is of a conical structure and the lower portion of the outer shell is of an inverted conical structure; the middle of the inner cone is of a cylindrical structure, and the upper conical structure of the inner cone is of an inverted conical structure at the lower part of the inner cone.
Further, another technical object of the present invention is to provide a novel method for adjusting the operation of a coarse powder separator.
The technical purpose of the invention is realized by the following technical scheme.
A novel working method for adjusting a coarse powder separator is characterized in that: the working method comprises the following steps:
coal powder and gas enter from the inlet pipe, and in the process of upward lifting, the coal powder and the gas firstly pass through the impurity removal grid to remove impurities and soft substances, so that the subsequent blockage of the adjusting baffle is avoided;
the coal powder and the gas start to do centrifugal motion through the cyclone device to obtain first-stage separation, and coarser particles are screwed out through the shutter and return to the coal mill for re-grinding after reaching a coarse particle outlet pipe;
the rest particles continuously rotate and go upwards, and reach the position of the axial blade through the annular channel, and are separated for the second time under the action of the axial blade, and the coarse particles are separated out under the action of the axial blade, discharged from a coarse particle outlet pipe and returned to the coal mill for continuous grinding; qualified coal powder continuously moves upwards to reach the regulating chamber, particles and gas are fully mixed in the regulating chamber, and the uniformly mixed particles and gas enter the outlet pipe.
Compared with the prior art, the invention has the following advantages:
1. the air powder is in the adjusting chamber, and the rotating air-powder mixture passes through a certain mixing space and then enters the outlet pipe for distribution, so that the problem of uneven flow of the pulverized coal in the powder conveying pipeline is solved;
2. the cylindrical adjusting chamber is arranged, the air powder flow velocity in the adjusting chamber is relatively small, and the abrasion of the adjusting baffle can be effectively reduced;
3. the coal powder adjusting device is flexible to adjust and convenient to maintain.
4. The rotary adjusting baffle plays a role in promoting the wind powder to enter the outlet pipe, and is favorable for reducing the integral resistance of the coarse powder separator.
Drawings
FIG. 1 is a schematic diagram of the configuration of the novel conditioning coarse powder separator of examples 1-4 of the present invention.
FIG. 2 is a schematic view showing the structure of a conditioning chamber in accordance with embodiment 1 of the present invention (the conditioning baffle is of a fixed structure).
Fig. 3 is a schematic structural view of a conditioning chamber of embodiment 1 of the present invention (the conditioning baffle is of a fixed structure).
Fig. 4 is a schematic structural view of a conditioning chamber of embodiment 2 of the present invention (the conditioning baffle is of a fixed structure).
Fig. 5 is a schematic structural view of a conditioning chamber of embodiment 2 of the present invention (the conditioning baffle is of a fixed structure).
Fig. 6 is a schematic structural view of a conditioning chamber in embodiment 3 of the present invention (the conditioning baffle is of a rotary structure).
Fig. 7 is a schematic structural view of a conditioning chamber in embodiment 3 of the present invention (the conditioning shutter is of a rotary structure).
Fig. 8 is a schematic structural view of a conditioning chamber of embodiment 3 (the conditioning baffle is of a rotary structure) of the present invention.
Fig. 9 is a schematic structural view of a conditioning chamber of embodiment 3 (the conditioning baffle is of a rotary structure) of the present invention.
Fig. 10 is a schematic structural view of a conditioning chamber of embodiment 4 of the present invention (the conditioning shutter is of a rotary structure).
Fig. 11 is a schematic structural view of a conditioning chamber of embodiment 4 (the conditioning baffle is in a rotary structure) of the present invention.
In the figure: the device comprises an inlet pipe 1, an impurity removing grid 2, a cyclone device 3, a shutter 4, an annular channel 5, an inner cone 6, axial blades 7, an adjusting baffle 8, an outlet pipe 9, a central hub 10, a coarse particle outlet pipe 11, an outer shell 12, an adjusting chamber 13, a flow distributing plate 14, a flow distributing shaft 15, a flow adjusting plate 16, a flow adjusting shaft 17, a flow adjusting handle 18 and a hub driving shaft 19.
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.
It should be understood that the structures, ratios, sizes, and the like shown in the drawings and described in the specification are only used for matching with the disclosure of the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions under which the present invention can be implemented, so that the present invention has no technical significance, and any structural modification, ratio relationship change, or size adjustment should still fall within the scope of the present invention without affecting the efficacy and the achievable purpose of the present invention. In the present specification, the terms "upper", "lower", "left", "right", "middle" and "one" are used for clarity of description, and are not used to limit the scope of the present invention, and the relative relationship between the terms and the relative positions may be changed or adjusted without substantial technical changes.
Example 1 (as shown in figures 1, 2, 3).
The novel adjust coarse powder separator in this embodiment, including import pipe 1, edulcoration grid 2, swirl device 3, shutter 4, interior cone 6, axial blade 7, adjusting the baffle 8, outlet pipe 9, central wheel hub 10, coarse grain outlet pipe 11, shell body 12, regulation room 13, flow distribution board 14 and flow distribution axle 15, interior cone 6 installs in shell body 12, forms annular channel 5 between interior cone 6 and the shell body 12.
Axial blade 7 in this embodiment installs in annular channel 5, and import pipe 1 communicates with shutter 4, and shutter 4 and coarse grain outlet pipe 11 all install the bottom of shell body 12, and all communicate with shell body 12, edulcoration grid 2 and swirl device 3 all install in import pipe 1, and adjusting chamber 13 installs at the top of shell body 12, and communicates with shell body 12, and adjusting baffle 8 installs in adjusting chamber 13 through central hub 10, and outlet pipe 9 installs on adjusting chamber 13, and communicates with adjusting chamber 13.
In this embodiment, one end of the inlet pipe 1 is arranged in a bell mouth-shaped structure, a distance exists between the end and the inner cone 6, the other end of the inlet pipe 1 is exposed out of the outer shell 12, the impurity removing grid 2 is positioned at the upstream of the cyclone device 3, and the shutter 4 is positioned at the downstream of the cyclone device 3.
The outer shell 12 in this embodiment is a hollow structure, the middle of the outer shell 12 is a cylindrical structure, and the upper portion of the outer shell 12 is a conical structure, and the lower portion of the outer shell 12 is an inverted conical structure; the middle of the inner cone 6 is of a cylindrical structure, and the upper conical structure of the inner cone 6 is of an inverted conical structure at the lower part of the inner cone 6.
The adjusting baffle 8 is of a fixed structure, the central hub 10 is of an annular hollow structure, one end of the adjusting baffle 8 is fixed with the central hub 10, and the other end of the adjusting baffle 8 is fixed with the inner wall of the adjusting chamber 13; the flow distribution plate 14 is fixed with a flow distribution shaft 15, the flow distribution shaft 15 is installed on the adjusting chamber 13, the flow distribution plate 14 is matched with the outlet pipe 9, the adjusting baffle plates 8 are arranged in a circumferential array along the axis of the central hub 10, and the adjusting baffle plates 8 are arranged vertically to the horizontal plane; the number of the adjusting baffles 8 is 10-16, the adjusting baffles are uniformly arranged along the circumferential direction of the inner wall of the cylinder of the adjusting chamber 13, and the number of the adjusting baffles 8 is 14 as the optimal adjusting baffles.
The working method of the novel coarse powder adjusting separator in the embodiment comprises the following steps: coal dust and gas enter from the inlet pipe 1, and in the process of lifting upwards, the coal dust and the gas firstly pass through the impurity removal grid 2 to remove impurities and soft substances, so that the subsequent blockage of the adjusting baffle 8 is avoided; the coal powder and the gas start to do centrifugal motion through the cyclone device 3 to obtain first-stage separation, and coarser particles are screwed out through the shutter 4 and reach a coarse particle outlet pipe 11 to return to the coal mill for re-grinding; the rest particles continuously rotate and go upwards, pass through the annular channel 5 and reach the position of the axial blade 7, and are subjected to secondary separation under the action of the axial blade 7, and the coarse particles are separated under the action of the axial blade 7, discharged from a coarse particle outlet pipe 11 and returned to the coal mill for continuous grinding; qualified coal powder continuously moves upwards to reach the regulating chamber 13, particles and gas are fully mixed in the regulating chamber 13, and the uniformly mixed particles and gas enter the outlet pipe 9.
Example 2 (as shown in figures 1, 4, 5).
The novel adjust coarse powder separator in this embodiment, including import pipe 1, edulcoration grid 2, swirl device 3, shutter 4, interior cone 6, axial blade 7, adjusting the baffle 8, outlet pipe 9, central wheel hub 10, coarse grain outlet pipe 11, shell body 12, regulation room 13, flow control board 16, flow control axle 17 and flow control handle 18, interior cone 6 is installed in shell body 12, forms annular channel 5 between interior cone 6 and the shell body 12.
Axial blade 7 in this embodiment installs in annular channel 5, and import pipe 1 communicates with shutter 4, and shutter 4 and coarse grain outlet pipe 11 all install the bottom of shell body 12, and all communicate with shell body 12, edulcoration grid 2 and swirl device 3 all install in import pipe 1, and adjusting chamber 13 installs at the top of shell body 12, and communicates with shell body 12, and adjusting baffle 8 installs in adjusting chamber 13 through central hub 10, and outlet pipe 9 installs on adjusting chamber 13, and communicates with adjusting chamber 13.
In this embodiment, one end of the inlet pipe 1 is arranged in a bell mouth-shaped structure, a distance exists between the end and the inner cone 6, the other end of the inlet pipe 1 is exposed out of the outer shell 12, the impurity removing grid 2 is positioned at the upstream of the cyclone device 3, and the shutter 4 is positioned at the downstream of the cyclone device 3.
The outer shell 12 in this embodiment is a hollow structure, the middle of the outer shell 12 is a cylindrical structure, and the upper portion of the outer shell 12 is a conical structure, and the lower portion of the outer shell 12 is an inverted conical structure; the middle of the inner cone 6 is of a cylindrical structure, and the upper conical structure of the inner cone 6 is of an inverted conical structure at the lower part of the inner cone 6.
The adjusting baffle 8 is of a fixed structure, the central hub 10 is of an annular hollow structure, one end of the adjusting baffle 8 is fixed with the central hub 10, and the other end of the adjusting baffle 8 is fixed with the inner wall of the adjusting chamber 13; the flow adjusting plate 16 is fixed with a flow adjusting shaft 17, a sealing shaft sleeve is sleeved outside the flow adjusting shaft 17 and is arranged on the side wall of the adjusting chamber 13, one end of the flow adjusting shaft 17 is rotatably arranged on the central hub 10, the other end of the flow adjusting shaft 17 is fixed with a flow adjusting handle 18, the flow adjusting plate 16 is matched with the outlet pipe 9, the number of adjusting baffles 8 is multiple, the adjusting baffles 8 are symmetrically arranged, the adjusting baffles 8 are vertically arranged with the horizontal plane, and the flow adjusting plate 16 can rotate for 360 degrees; the adjusting baffles 8 are divided into two parts which are symmetrical and respectively correspond to the outlet pipes 9, 6-8 baffles are arranged on each part and are distributed along the circumferential direction of the inner side of the outer wall of the cylinder of the adjusting chamber 13, the total number of the baffles is 14 as the optimal number, and 2 flow adjusting plates 16 and 12 adjusting baffles 8 are arranged.
The working method of the novel coarse powder adjusting separator in the embodiment comprises the following steps: coal dust and gas enter from the inlet pipe 1, and in the process of lifting upwards, the coal dust and the gas firstly pass through the impurity removal grid 2 to remove impurities and soft substances, so that the subsequent blockage of the adjusting baffle 8 is avoided; the coal powder and the gas start to do centrifugal motion through the cyclone device 3 to obtain first-stage separation, and coarser particles are screwed out through the shutter 4 and reach a coarse particle outlet pipe 11 to return to the coal mill for re-grinding; the rest particles continuously rotate and go upwards, pass through the annular channel 5 and reach the position of the axial blade 7, and are subjected to secondary separation under the action of the axial blade 7, and the coarse particles are separated under the action of the axial blade 7, discharged from a coarse particle outlet pipe 11 and returned to the coal mill for continuous grinding; qualified coal powder continuously moves upwards to reach the regulating chamber 13, particles and gas are fully mixed in the regulating chamber 13, and the uniformly mixed particles and gas enter the outlet pipe 9.
Example 3 (as shown in figures 1, 6-9).
The novel adjust coarse powder separator in this embodiment, including import pipe 1, edulcoration grid 2, swirl device 3, shutter 4, interior cone 6, axial blade 7, adjusting the baffle 8, outlet pipe 9, central wheel hub 10, coarse grain outlet pipe 11, shell body 12, regulation chamber 13 and wheel hub drive shaft 19, interior cone 6 is installed in shell body 12, forms annular channel 5 between interior cone 6 and the shell body 12.
Axial blade 7 in this embodiment installs in annular channel 5, and import pipe 1 communicates with shutter 4, and shutter 4 and coarse grain outlet pipe 11 all install the bottom of shell body 12, and all communicate with shell body 12, edulcoration grid 2 and swirl device 3 all install in import pipe 1, and adjusting chamber 13 installs at the top of shell body 12, and communicates with shell body 12, and adjusting baffle 8 installs in adjusting chamber 13 through central hub 10, and outlet pipe 9 installs on adjusting chamber 13, and communicates with adjusting chamber 13.
In this embodiment, one end of the inlet pipe 1 is arranged in a bell mouth-shaped structure, a distance exists between the end and the inner cone 6, the other end of the inlet pipe 1 is exposed out of the outer shell 12, the impurity removing grid 2 is positioned at the upstream of the cyclone device 3, and the shutter 4 is positioned at the downstream of the cyclone device 3.
The outer shell 12 in this embodiment is a hollow structure, the middle of the outer shell 12 is a cylindrical structure, and the upper portion of the outer shell 12 is a conical structure, and the lower portion of the outer shell 12 is an inverted conical structure; the middle of the inner cone 6 is of a cylindrical structure, and the upper conical structure of the inner cone 6 is of an inverted conical structure at the lower part of the inner cone 6.
The adjusting baffle 8 is of a rotary structure, the upper end of a central hub 10 is connected with one end of a hub driving shaft 19, the other end of the hub driving shaft 19 is connected with driving equipment, the lower end of the central hub 10 is arranged in a solid arc-shaped structure, one end of the adjusting baffle 8 is fixed with the central hub 10, and a gap is formed between the other end of the adjusting baffle 8 and the inner wall of the adjusting chamber 13; the new conditioning meal separator of claim 6 wherein: the number of the adjusting baffles 8 is multiple, the adjusting baffles 8 are unevenly distributed along the axis of the central hub 10, or the adjusting baffles 8 are concentrated on the even part on one side of the central hub 10, and the adjusting baffles 8 are arranged vertically to the horizontal plane; the number of the adjusting baffles 8 is 10-16, the adjusting baffles are all unevenly distributed along the inner side of the cylinder of the adjusting chamber 13, one side of the adjusting baffles are sparsely distributed, the other side of the adjusting baffles are densely distributed, the number of the baffles in a sparse area is not less than 30% of the total number of the adjusting baffles 8, the number of the baffles in a dense area is not more than 70% of the total number of the adjusting baffles 8, or the number of the adjusting baffles 8 is 6-8, the adjusting baffles are all circumferentially distributed along the inner side of the cylinder of the adjusting chamber 13, the cylinder of the adjusting chamber 13 is evenly divided into two parts, one part is provided with; preferably, the number of the adjusting baffles 8 is 12, and the adjusting baffles are not uniformly distributed as shown in fig. 6 and 7, or the number of the adjusting baffles 8 is 8, and the adjusting baffles are uniformly distributed on the concentrating side as shown in fig. 8 and 9.
The working method of the novel coarse powder adjusting separator in the embodiment comprises the following steps: coal dust and gas enter from the inlet pipe 1, and in the process of lifting upwards, the coal dust and the gas firstly pass through the impurity removal grid 2 to remove impurities and soft substances, so that the subsequent blockage of the adjusting baffle 8 is avoided; the coal powder and the gas start to do centrifugal motion through the cyclone device 3 to obtain first-stage separation, and coarser particles are screwed out through the shutter 4 and reach a coarse particle outlet pipe 11 to return to the coal mill for re-grinding; the rest particles continuously rotate and go upwards, pass through the annular channel 5 and reach the position of the axial blade 7, and are subjected to secondary separation under the action of the axial blade 7, and the coarse particles are separated under the action of the axial blade 7, discharged from a coarse particle outlet pipe 11 and returned to the coal mill for continuous grinding; qualified coal powder continuously moves upwards to reach the regulating chamber 13, particles and gas are fully mixed in the regulating chamber 13, and the uniformly mixed particles and gas enter the outlet pipe 9.
Example 4 (as shown in figures, 1, 10, 11).
The novel adjust coarse powder separator in this embodiment, including import pipe 1, edulcoration grid 2, swirl device 3, shutter 4, interior cone 6, axial blade 7, adjusting the baffle 8, outlet pipe 9, central wheel hub 10, coarse grain outlet pipe 11, shell body 12, regulation chamber 13 and wheel hub drive shaft 19, interior cone 6 is installed in shell body 12, forms annular channel 5 between interior cone 6 and the shell body 12.
Axial blade 7 in this embodiment installs in annular channel 5, and import pipe 1 communicates with shutter 4, and shutter 4 and coarse grain outlet pipe 11 all install the bottom of shell body 12, and all communicate with shell body 12, edulcoration grid 2 and swirl device 3 all install in import pipe 1, and adjusting chamber 13 installs at the top of shell body 12, and communicates with shell body 12, and adjusting baffle 8 installs in adjusting chamber 13 through central hub 10, and outlet pipe 9 installs on adjusting chamber 13, and communicates with adjusting chamber 13.
In this embodiment, one end of the inlet pipe 1 is arranged in a bell mouth-shaped structure, a distance exists between the end and the inner cone 6, the other end of the inlet pipe 1 is exposed out of the outer shell 12, the impurity removing grid 2 is positioned at the upstream of the cyclone device 3, and the shutter 4 is positioned at the downstream of the cyclone device 3.
The outer shell 12 in this embodiment is a hollow structure, the middle of the outer shell 12 is a cylindrical structure, and the upper portion of the outer shell 12 is a conical structure, and the lower portion of the outer shell 12 is an inverted conical structure; the middle of the inner cone 6 is of a cylindrical structure, and the upper conical structure of the inner cone 6 is of an inverted conical structure at the lower part of the inner cone 6.
The adjusting baffle 8 is of a rotary structure, the upper end of a central hub 10 is connected with one end of a hub driving shaft 19, the other end of the hub driving shaft 19 is connected with driving equipment, the lower end of the central hub 10 is arranged in a solid arc-shaped structure, one end of the adjusting baffle 8 is fixed with the central hub 10, and a gap is formed between the other end of the adjusting baffle 8 and the inner wall of the adjusting chamber 13; the number of the adjusting baffles 8 is multiple, the adjusting baffles 8 are uniformly distributed along the axis of the central hub 10, the adjusting baffles 8 on one side of the central hub 10 are arranged vertically to the horizontal plane, and included angles exist between the adjusting baffles 8 on the other side of the central hub 10 and the horizontal plane; the quantity of adjusting baffle 8 is 10 ~ 16 pieces, and all the inboard distribution of drum along control chamber 13 is even, and one side adjusting baffle 8 is 45 degrees ~ 90 degrees with the contained angle of horizontal direction, and adjusting baffle 8's incline direction will be unanimous with the direction of rotation of gas, and opposite side adjusting baffle 8 is perpendicular with the horizontal plane, and it is 45 to have the contained angle as preferring between adjusting baffle 8 and the horizontal plane, and incline direction is unanimous with the air current direction, and adjusting baffle 8 quantity is 15 pieces.
The working method of the novel coarse powder adjusting separator in the embodiment comprises the following steps: coal dust and gas enter from the inlet pipe 1, and in the process of lifting upwards, the coal dust and the gas firstly pass through the impurity removal grid 2 to remove impurities and soft substances, so that the subsequent blockage of the adjusting baffle 8 is avoided; the coal powder and the gas start to do centrifugal motion through the cyclone device 3 to obtain first-stage separation, and coarser particles are screwed out through the shutter 4 and reach a coarse particle outlet pipe 11 to return to the coal mill for re-grinding; the rest particles continuously rotate and go upwards, pass through the annular channel 5 and reach the position of the axial blade 7, and are subjected to secondary separation under the action of the axial blade 7, and the coarse particles are separated under the action of the axial blade 7, discharged from a coarse particle outlet pipe 11 and returned to the coal mill for continuous grinding; qualified coal powder continuously moves upwards to reach the regulating chamber 13, particles and gas are fully mixed in the regulating chamber 13, and the uniformly mixed particles and gas enter the outlet pipe 9.
In addition, it should be noted that the specific embodiments described in the present specification may be different in the components, the shapes of the components, the names of the components, and the like, and the above description is only an illustration of the structure of the present invention. Equivalent or simple changes in the structure, characteristics and principles of the invention are included in the protection scope of the patent. Various modifications, additions and substitutions for the specific embodiments described may be made by those skilled in the art without departing from the scope of the invention as defined in the accompanying claims.
Claims (10)
1. The utility model provides a novel adjust coarse powder separator, includes inner cone (6) and shell body (12), inner cone (6) are installed in shell body (12), form annular channel (5), its characterized in that between inner cone (6) and shell body (12): still include import pipe (1), edulcoration grid (2), whirl device (3), shutter (4), axial blade (7), adjusting baffle (8), outlet pipe (9), central wheel hub (10), coarse grain outlet pipe (11) and regulation room (13), install in annular channel (5) axial blade (7), import pipe (1) and shutter (4) intercommunication, shutter (4) and coarse grain outlet pipe (11) are all installed in the bottom of shell body (12) and all are communicated with shell body (12), edulcoration grid (2) and whirl device (3) are all installed in import pipe (1), regulation room (13) are installed at the top of shell body (12) and are communicated with shell body (12), adjusting baffle (8) are installed in regulation room (13) through central wheel hub (10), outlet pipe (9) are installed on regulation room (13), And communicates with the regulation chamber (13).
2. The new conditioning meal separator of claim 1 wherein: the utility model discloses a trash bin, including import pipe (1), purification grid (2), shutter (4), inner cone (6), shell (12), the one end of import pipe (1) is the setting of horn mouth column structure, and has the distance between this end and inner cone (6), the other end of import pipe (1) exposes in shell body (12), edulcoration grid (2) are located the upper reaches of whirl device (3), shutter (4) are located the low reaches of whirl device (3).
3. The new conditioning meal separator of claim 1 wherein: adjusting baffle (8) are fixed structure, central wheel hub (10) are cyclic annular hollow structure, the one end and central wheel hub (10) of adjusting baffle (8) are fixed, the other end and the inner wall of regulating chamber (13) of adjusting baffle (8) are fixed.
4. The new conditioning meal separator of claim 3 wherein: novel adjust coarse powder separator still includes flow distribution board (14) and flow distribution axle (15), flow distribution board (14) are fixed with flow distribution axle (15), flow distribution axle (15) are installed on regulation room (13), flow distribution board (14) and outlet pipe (9) cooperation, adjusting baffle (8) are circumference array along the axis of central wheel hub (10) and arrange, adjusting baffle (8) and horizontal plane vertical arrangement.
5. The new conditioning meal separator of claim 3 wherein: novel adjust middlings separator still includes flow control board (16), flow control axle (17) and flow control handle (18), flow control board (16) are fixed with flow control axle (17), flow control axle (17) overcoat is equipped with sealed axle sleeve, sealed axle sleeve is installed on the lateral wall of regulating chamber (13), the one end rotation of flow control axle (17) is installed on central wheel hub (10), the other end and the flow control handle (18) of flow control axle (17) are fixed, flow control board (16) and outlet pipe (9) cooperation, the quantity of adjusting damper (8) is a plurality of, and a plurality of adjusting damper (8) symmetry set up, adjusting damper (8) are arranged with the horizontal plane is perpendicular, flow control board (16) can 360 rotate.
6. The new conditioning meal separator of claim 1 wherein: adjusting damper (8) are the rotation type structure, novel adjust middlings separator still includes wheel hub drive shaft (19), the upper end of central wheel hub (10) is connected with the one end of wheel hub drive shaft (19), the other end and the drive arrangement of wheel hub drive shaft (19) are connected, the lower extreme of central wheel hub (10) is solid circular-arc structure setting, the one end and the central wheel hub (10) of adjusting damper (8) are fixed, there is the clearance between the other end of adjusting damper (8) and the inner wall of regulating chamber (13).
7. The new conditioning meal separator of claim 6 wherein: the number of the adjusting baffles (8) is multiple, the adjusting baffles (8) are unevenly distributed along the axis of the central hub (10), or the adjusting baffles (8) are concentrated on the uniform part on one side of the central hub (10), and the adjusting baffles (8) are arranged perpendicular to the horizontal plane.
8. The new conditioning meal separator of claim 6 wherein: the quantity of adjusting the baffle (8) is a plurality of, and a plurality of adjusting the baffle (8) are along central wheel hub's (10) axis evenly distributed, and wherein a plurality ofly lie in central wheel hub (10) one side adjusting the baffle (8) and arrange with the horizontal plane is perpendicular, and a plurality ofly lie in and have the contained angle between central wheel hub (10) opposite side adjusting the baffle (8) and the horizontal plane.
9. The new conditioning meal separator of claim 1 wherein: the outer shell (12) is of a hollow structure, the middle of the outer shell (12) is of a cylindrical structure, and the upper conical structure of the outer shell (12) is of an inverted conical structure at the lower part of the outer shell (12); the middle of the inner cone (6) is of a cylindrical structure, and the upper conical structure of the inner cone (6) is of an inverted conical structure at the lower part of the inner cone (6).
10. A method of operating a novel classifier as claimed in any one of claims 1 to 9, wherein: the working method comprises the following steps:
coal powder and gas enter from the inlet pipe (1), and in the process of lifting upwards, impurities and soft substances are removed through the impurity removal grating (2), so that the subsequent blockage of the adjusting baffle (8) is avoided;
the coal powder and the gas start to do centrifugal motion through the cyclone device (3) to obtain first-stage separation, and coarser particles are screwed out through the shutter (4) and reach a coarse particle outlet pipe (11) to return to the coal mill for re-grinding;
the rest particles continuously rotate and go upwards, pass through the annular channel (5) and reach the position of the axial blade (7), are subjected to secondary separation under the action of the axial blade (7), and are separated out under the action of the axial blade (7), discharged from a coarse particle outlet pipe (11) and returned to the coal mill for continuous grinding; qualified coal powder continuously moves upwards to reach the regulating chamber (13), particles and gas are fully mixed in the regulating chamber (13), and the uniformly mixed particles and gas enter the outlet pipe (9).
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| CN202010284729.1A CN111515129A (en) | 2020-04-13 | 2020-04-13 | Novel adjusting coarse powder separator and working method |
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| CN202010284729.1A CN111515129A (en) | 2020-04-13 | 2020-04-13 | Novel adjusting coarse powder separator and working method |
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Cited By (3)
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| CN112138848A (en) * | 2020-09-16 | 2020-12-29 | 华润电力湖北有限公司 | Axial separator of coal mill |
| CN112682812A (en) * | 2020-12-29 | 2021-04-20 | 锡林郭勒热电有限责任公司 | Pulverized coal distributor |
| CN117840041B (en) * | 2024-03-07 | 2024-05-03 | 福建美宏科技有限公司 | Special grader for carbon powder |
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| CN117840041B (en) * | 2024-03-07 | 2024-05-03 | 福建美宏科技有限公司 | Special grader for carbon powder |
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