CN219647765U - Pulverized coal separation and homogenization device - Google Patents
Pulverized coal separation and homogenization device Download PDFInfo
- Publication number
- CN219647765U CN219647765U CN202320488748.5U CN202320488748U CN219647765U CN 219647765 U CN219647765 U CN 219647765U CN 202320488748 U CN202320488748 U CN 202320488748U CN 219647765 U CN219647765 U CN 219647765U
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- pulverized coal
- impeller
- homogenizing
- coal
- shell
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- 239000003245 coal Substances 0.000 title claims abstract description 97
- 238000000265 homogenisation Methods 0.000 title claims abstract description 26
- 238000000926 separation method Methods 0.000 title claims abstract description 20
- 239000000843 powder Substances 0.000 claims description 25
- 239000002817 coal dust Substances 0.000 claims description 18
- 230000003068 static effect Effects 0.000 claims description 9
- 230000008676 import Effects 0.000 claims 1
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 238000002485 combustion reaction Methods 0.000 description 5
- 239000000428 dust Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000010298 pulverizing process Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000004939 coking Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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- Combined Means For Separation Of Solids (AREA)
Abstract
The utility model relates to a pulverized coal separation and homogenization device, which comprises a pulverized coal separator (2) connected with a pulverized coal pipe (1.1) of a coal mill (1), wherein an outlet of the pulverized coal separator (2) is connected with a plurality of pulverized air pipelines (2.1), the tail end of each pulverized air pipeline (2.1) is connected with a pulverized coal homogenization device (3), the pulverized coal homogenization device (3) comprises a shell (3.1) and at least one group of homogenization impellers (3.2) arranged in the shell (3.1), a wheel shaft of each homogenization impeller (3.2) penetrates through the top of the shell (3.1) and is driven by a speed-adjustable speed-reducing motor (3.3), the bottom of the shell (3.1) is provided with an inlet connected with the pulverized air pipeline (2.1), and the top of the shell (3.1) is also provided with a primary air pipe (3.3) and a pulverized coal outlet pipe (3.4). The utility model has the beneficial effects of high efficiency, accuracy and uniform concentration of pulverized coal fineness separation.
Description
Technical Field
The utility model relates to the technical field of coal treatment equipment, in particular to coal dust treatment equipment, and specifically relates to a coal dust separation and homogenization device.
Background
The coal dust separator is arranged at the outlet of each coal mill, the burner is arranged at the tail end of the air powder pipeline of 4 to 6 air powder pipelines, and in actual operation, the boiler is influenced by the fact that the fineness of coal dust and the concentration of coal dust entering each burner are greatly different, the serious deviation causes the non-uniformity of the boiler temperature field, and the conditions of burner damage, water wall corrosion, coking, local overtemperature, smoke temperature deviation and the like are caused, so that the safe and economic operation of the boiler is influenced.
For a thermal power generating unit burning pulverized coal, the fineness and concentration of pulverized coal blown into a hearth have great influence on economy and safety of combustion, and for a specific unit and a specific coal type, the fineness of pulverized coal is required to be controlled within a certain range. The particle size of the pulverized coal is too large, the pulverized coal is not combusted sufficiently, and the carbon content of the fly ash is high. The pulverized coal is too fine, and does not meet the requirements of combustion economy, safety and pulverizing economy. Therefore, the pulverized coal must be controlled within a reasonable particle size range, and the concentration deviation of the pulverized coal entering each burner must be controlled within a reasonable range, so as to meet the requirements of pulverizing and combustion economy.
However, because the current industry technology is limited in development level, the technology for homogenizing and adjusting the concentration of the coal powder entering the air-powder pipeline is less on the basis of high-efficiency and accurate separation of the coal powder, and the effect is poor, for a dynamic separator, the fine powder entering of the rotating cage and the coarse powder discharging channel overlap and are opposite, the opposite causes fine powder turning back and coarse powder escape, the powder returning rate is high, the coarse powder running is serious, the resistance is increased along with the increase of the rotating speed, the situation is worsened, the coal powder separation efficiency is reduced, and the coal powder fineness adjustment is difficult and rough. Meanwhile, because of the non-uniformity of the flow field of the dry air supply entering the coal mill and the separator, the non-symmetry of the internal structure of the coal mill and the change of the internal working conditions of the coal mill and the separation, the concentration deviation of the coal dust entering each burner is larger, and therefore, a technology and a product which can effectively and accurately separate the fineness of the coal dust at the outlet of the coal dust separator and perform concentration homogenization before entering the air-dust pipeline are urgently needed, so as to meet the requirements of adjustment of the coal dust separator and combustion adjustment of a boiler.
Disclosure of Invention
Aiming at the defects of the prior art, the utility model provides a coal powder separation and homogenization device capable of homogenizing the concentration of coal powder after coarse and fine separation.
The utility model is realized by the following technical scheme, and provides a coal dust separation homogenizing device which comprises a coal dust separator connected with a coal dust pipe of a coal mill in a pipe joint manner, wherein an outlet of the coal dust separator is connected with a plurality of air dust pipelines, the tail end of each air dust pipeline is connected with a coal dust homogenizing device, the coal dust homogenizing device comprises a shell and at least one group of homogenizing impellers arranged in the shell, a wheel shaft of each homogenizing impeller penetrates through the top of the shell and is driven by a speed-adjustable gear motor, an inlet connected with the air dust pipeline is formed in the bottom of the shell, and a primary air pipe and a coal dust outlet pipe are further arranged at the top of the shell.
After the scheme is adopted, the pulverized coal from the coal mill is subjected to coarse-fine separation through the pulverized coal separator, separated pulverized coal fine powder is rotated through the arranged pulverized coal homogenizing device by the homogenizing impeller, so that the concentration of the pulverized coal fine powder is uniformly mixed and then conveyed to the pulverized coal outlet pipe, and the uniformly mixed pulverized coal is conveyed to the burner through the pulverized coal outlet pipe. Through the technical scheme, the concentration homogenization can be carried out on the pulverized coal before entering the air-powder pipeline of the burner, and the requirements of adjustment of a pulverized coal separator and adjustment of boiler combustion can be met.
Preferably, the gear motor comprises a variable frequency motor and a gear pair which is axially connected with a rotating shaft of the variable frequency motor. The preferable scheme can well realize the driving of the homogenizing impeller and achieve the purpose of speed regulation.
Preferably, the blades of the homogenizing impeller are impeller blades with a certain lift angle. The preferable scheme can form a certain lifting force on homogenized coal powder, so that the uniformly mixed coal powder can be better conveyed.
Preferably, the blades of the homogenizing impeller are in a two-stage or three-stage structure which is divided up and down, the length of the impeller blades of the upper group is longer than that of the impeller blades of the lower group, and the number of the impeller blades of each group can be 4, 6, 8 or more.
Preferably, the upper and lower positions of the two groups of blades of the homogenizing impeller are staggered.
Preferably, the pulverized coal separator comprises a separator shell and an inner cone, wherein the lower part of the separator shell is connected with a pulverized coal pipe of a coal mill in a pipe joint manner and is connected with a pulverized coal return pipe of the coal mill in a pipe joint manner, the inner cone is coaxially hung in the separator shell, an annular pulverized coal channel is formed between the separator shell and the inner cone, a rotating cage driven by a speed-adjustable driving motor is arranged at the top of the inner cone, the connection part between the upper part of the inner cone and the top of the separator shell is an open annular pulverized coal channel and is provided with a plurality of static baffles used for adjusting the flow direction of pulverized coal, and the static baffles are arranged on the inner side of the top of the separator shell and are provided with handles used for adjusting the turning direction of the static baffles. The optimal scheme has the beneficial effect that the high-efficiency and accurate separation of the fineness of the pulverized coal can be realized.
Preferably, the shaft of the driving motor, the shaft of the homogenizing impeller, the rotating cage and the axis of the inner cone are the same, and the shaft of the homogenizing impeller and the gear piece for driving the homogenizing impeller are provided with hollow channels so that the motor shaft of the driving motor passes through and drives the rotating cage to rotate.
Preferably, the rotation directions of the homogenizing impeller and the rotating cage are opposite.
In summary, the utility model realizes the technical effect of homogenizing the concentration of the pulverized coal after the pulverized coal coarse-fine separation by the designed pulverized coal homogenizing device, and has the beneficial effects of high efficiency, accuracy and uniform concentration of pulverized coal fineness separation.
Drawings
FIG. 1 is a schematic diagram of a pulverized coal separation and homogenization device according to the present utility model;
FIG. 2 is a schematic top view of the homogenizing impeller of FIG. 1;
the figure shows:
1. the coal pulverizer, 1.1, the pulverized coal pipe, 2, the pulverized coal separator, 2.1, the separator shell, 2.2, the inner cone, 2.3, the rotating cage, 2.4, driving motor, 2.5, static baffle, 2.6, the powder return pipe, 2.7, the wind powder pipeline, 3, the pulverized coal homogenization device, 3.1, the shell, 3.2, the homogenization impeller, 3.3, gear motor, 3.3.1, variable frequency motor, 3.3.2, gear pair, 3.4, the pulverized coal outlet pipe, 3.5, primary air pipe.
Detailed Description
In order to clearly illustrate the technical features of the present utility model, the present utility model will be further described below by means of specific embodiments in conjunction with the accompanying drawings.
As shown in fig. 1 and 2, a pulverized coal separation and homogenization device is provided, the pulverized coal separation and homogenization device comprises a pulverized coal separator 2 connected with a pulverized coal pipe 1.1 of a coal mill 1, an outlet of the pulverized coal separator 2 is connected with a plurality of pulverized air pipelines 2.7, the tail end of each pulverized air pipeline 2.7 is connected with a pulverized coal homogenization device 3, each pulverized coal homogenization device 3 comprises a shell 3.1 and at least one group of homogenization impellers 3.2 arranged in the shell 3.1, an axle of each homogenization impeller 3.2 penetrates through the top of the shell 3.1 and is driven by a speed-adjustable speed-reducing motor 3.3, each speed-reducing motor 3.3 comprises a variable frequency motor 3.3.1 and a gear pair 3.3.2 connected with a rotating shaft of the variable frequency motor, the bottom of the shell 3.1 is provided with an inlet connected with the corresponding pulverized air pipeline 2.7, and the top of the shell 3.1 is also provided with a primary air pipe 3.5 and a pulverized coal outlet pipe 3.4.
In this embodiment, the pulverized coal separator 2 includes a separator housing 2.1 and an inner cone 2.2, the lower part of the separator housing 2.1 is connected with a pulverized coal pipe 1.1 of the coal mill 1 and is provided with a pulverized coal return pipe 2.6 connected with the coal mill 1, the inner cone 2.2 is coaxially hoisted in the separator housing 2.1, an annular pulverized coal channel is formed between the separator housing 2.1 and the inner cone 2.2, a rotating cage 2.3 driven by an adjustable speed driving motor 2.4 is mounted at the top of the inner cone 2.2, the joint between the upper part of the inner cone 2.2 and the top of the separator housing 2.1 is an open annular pulverized coal channel and is provided with a plurality of static baffles 2.5 for adjusting the flow direction of pulverized coal, and the static baffles 2.5 are mounted at the inner side of the top of the separator housing 2.1 and are provided with handles for adjusting the steering direction of the static baffles 2.5 at the outer side of the top of the separator housing 2.1; the shaft of the driving motor 2.4, the shaft of the homogenizing impeller 3.2, the rotating cage 2.3 and the shaft of the inner cone 2.2 are coaxial, the shaft of the homogenizing impeller 3.2 and the gear piece for driving the homogenizing impeller 3.2 are provided with hollow channels so that a motor shaft of the driving motor 2.4 passes through and drives the rotating cage 2.3 to rotate, and the rotating directions of the homogenizing impeller 3.2 and the rotating cage 2.3 are opposite;
in this embodiment, the blades of the homogenizing impeller 3.2 are impeller blades with a certain lift angle, and the blades of the homogenizing impeller 3.2 are of a two-stage structure with upper and lower groups, the length of the impeller blade of the upper group is greater than that of the impeller blade of the lower group, and the number of the impeller blades of each group can be 4 and the upper and lower positions are staggered.
Finally, it should be further noted that the foregoing examples and descriptions are not limited to the foregoing embodiments, and the technical features of the present utility model that are not described may be implemented by or by using the prior art, and are not described herein again; the above examples and drawings are only for illustrating the technical scheme of the present utility model and not for limiting the same, and the present utility model has been described in detail with reference to the preferred embodiments, and it should be understood by those skilled in the art that changes, modifications, additions or substitutions made by those skilled in the art without departing from the spirit of the present utility model and the scope of the appended claims.
Claims (8)
1. The utility model provides a buggy separation homogenization device, includes coal dust separator (2) with coal pulverizer (1) coal pipe (1.1) pipe joint, the exit linkage of coal dust separator (2) have a plurality of wind powder pipeline (2.7), its characterized in that, wind powder pipeline (2.7) end-to-end connection have buggy homogenization device (3), buggy homogenization device (3) include shell (3.1) and locate at least a set of homogenization impeller (3.2) in shell (3.1), the shaft of homogenization impeller (3.2) passes the top of shell (3.1) and drives through speed-adjustable gear motor (3.3), the bottom of shell (3.1) have the import with wind powder pipeline (2.7) pipe joint, the top of shell (3.1) still is equipped with primary air pipe (3.5) and buggy outlet pipe (3.4).
2. The pulverized coal separating and homogenizing device according to claim 1, wherein the reducing motor (3.3) comprises a variable frequency motor (3.3.1) and a gear pair (3.3.2) which is axially connected with a rotating shaft of the variable frequency motor.
3. A pulverized coal separating and homogenizing device according to claim 1, characterized in that the blades of the homogenizing impeller (3.2) are impeller blades with a certain lift angle.
4. A pulverized coal separating and homogenizing device according to claim 1, characterized in that the blades of the homogenizing impeller (3.2) are of a two-stage or three-stage structure, which are vertically divided into groups, the length of the impeller blades of the upper group being longer than the length of the impeller blades of the lower group, and the number of the impeller blades of each group being 4, 6, 8 or more.
5. The pulverized coal separating and homogenizing device according to claim 4, wherein the upper and lower positions of the two sets of blades of the homogenizing impeller (3.2) are staggered.
6. The pulverized coal separation and homogenization device according to claim 2, characterized in that the pulverized coal separator (2) comprises a separator housing (2.1) and an inner cone (2.2), the lower part of the separator housing (2.1) is connected with a pulverized coal pipe (1.1) of the coal mill (1) and is provided with a pulverized coal return pipe (2.6) connected with the coal mill (1), the inner cone (2.2) is coaxially hoisted in the separator housing (2.1), an annular pulverized coal channel is formed between the separator housing (2.1) and the inner cone (2.2), a rotating cage (2.3) driven by a speed-adjustable driving motor (2.4) is arranged at the top of the inner cone (2.2), the upper part of the inner cone (2.2) is connected with the top of the separator housing (2.1) to form an open annular pulverized coal channel and is provided with a plurality of static baffles (2.5) for adjusting the flow direction, and the static baffles (2.5) are arranged at the top of the separator housing (2.1) and are arranged at the top of the separator housing (2.1) for adjusting the flow direction.
7. The pulverized coal separating and homogenizing device according to claim 6, wherein the axis of the rotating shaft of the driving motor (2.4), the axis of the wheel shaft of the homogenizing impeller (3.2), the axis of the rotating cage (2.3) and the axis of the inner cone (2.2) are the same, and the axis of the homogenizing impeller (3.2) and the gear piece driving the homogenizing impeller (3.2) are provided with hollow channels so that the motor shaft of the driving motor (2.4) passes through and drives the rotating cage (2.3) to rotate.
8. A pulverized coal separating and homogenizing device according to claim 6, characterized in that the rotation directions of the homogenizing impeller (3.2) and the rotating cage (2.3) are opposite.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320488748.5U CN219647765U (en) | 2023-03-15 | 2023-03-15 | Pulverized coal separation and homogenization device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320488748.5U CN219647765U (en) | 2023-03-15 | 2023-03-15 | Pulverized coal separation and homogenization device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219647765U true CN219647765U (en) | 2023-09-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320488748.5U Active CN219647765U (en) | 2023-03-15 | 2023-03-15 | Pulverized coal separation and homogenization device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219647765U (en) |
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2023
- 2023-03-15 CN CN202320488748.5U patent/CN219647765U/en active Active
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