CN220836480U - Self-cleaning pulverized coal screen capable of rotating automatically - Google Patents
Self-cleaning pulverized coal screen capable of rotating automatically Download PDFInfo
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- CN220836480U CN220836480U CN202322345178.7U CN202322345178U CN220836480U CN 220836480 U CN220836480 U CN 220836480U CN 202322345178 U CN202322345178 U CN 202322345178U CN 220836480 U CN220836480 U CN 220836480U
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- screening
- pulverized coal
- fan
- screening net
- special
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- 239000003245 coal Substances 0.000 title claims abstract description 59
- 238000004140 cleaning Methods 0.000 title claims abstract description 26
- 238000012216 screening Methods 0.000 claims abstract description 91
- 238000007664 blowing Methods 0.000 claims abstract description 28
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 27
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims description 7
- 235000017491 Bambusa tulda Nutrition 0.000 claims description 7
- 241001330002 Bambuseae Species 0.000 claims description 7
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims description 7
- 239000011425 bamboo Substances 0.000 claims description 7
- 239000000843 powder Substances 0.000 claims description 5
- 229910001873 dinitrogen Inorganic materials 0.000 claims 1
- 229910052757 nitrogen Inorganic materials 0.000 abstract description 13
- 238000001914 filtration Methods 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 3
- 238000005265 energy consumption Methods 0.000 abstract description 2
- 239000012535 impurity Substances 0.000 description 8
- 239000000243 solution Substances 0.000 description 5
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 238000007873 sieving Methods 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000002269 spontaneous effect Effects 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000002817 coal dust Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
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- Combined Means For Separation Of Solids (AREA)
Abstract
The utility model discloses a self-rotating self-cleaning pulverized coal screen, which comprises a screening cylinder, wherein the top of the screening cylinder is provided with a feed inlet, the bottom of the screening cylinder is provided with a discharge outlet, a screening net is transversely arranged in a channel between the feed inlet and the discharge outlet in the screening cylinder, a fan is arranged above the screening net and rotates relative to the central position of the screening net through a rotating shaft, and at least one air blowing pipe for introducing nitrogen is arranged on the side wall of the screening cylinder; the fan at least comprises a plurality of special-shaped blades, and the special-shaped blades consist of a blade part and a windward part. The utility model has the advantages of simple structure, good filtering performance and the like, compressed nitrogen is sprayed to the blades of the fan through the air blowing pipe, the fan is blown to rotate, and the pulverized coal on the screening net can be scraped uniformly when the fan rotates, so that the screening net can rapidly filter the pulverized coal, the pulverized coal is prevented from accumulating on the screening net, the filtering efficiency of the filtered pulverized coal sieve is prevented from being influenced, the fan is not required to be driven to rotate by a motor, the energy consumption of the pulverized coal sieve can be reduced, and the filtering effect is obviously improved.
Description
Technical Field
The utility model relates to the technical field of pulverized coal screening equipment, in particular to a self-cleaning pulverized coal screen with rotation.
Background
The impurities and gum layers in the raw coal become fiber flocs during the grinding process, and if the flocs enter the next coal powder injection process, the flocs affect the injection rate and stability, so the flocs must be filtered before entering the injection system. The pulverized coal is generally screened by a pulverized coal screen, and floccules in the pulverized coal are separated from the pulverized coal by the pulverized coal screen.
The utility model patent with the application number of CN2007200623065 discloses a rotary self-cleaning type pulverized coal screen for blast furnace coal injection, which comprises a shell, wherein the top surface of the shell is provided with a feed inlet, the lower end part of the shell is provided with a discharge outlet, a motor is arranged at the center of the top surface of the shell, the screen surface of the motor is a special-shaped screen with a special-shaped longitudinal section, the center of the screen surface is connected with a motor transmission shaft, a compressed air blowing cleaning pipe is arranged between the shell and the screen surface, and the cleaning pipe is fixedly connected with the shell; the coal powder screen drives the screen to rotate through the motor, and compressed air is blown to the screen through the cleaning pipe at the bottom of the screen, so that coal powder on the screen falls through the screen, the coal powder is separated from sundries, and the purpose of self cleaning is achieved. However, the pulverized coal screen has the following defects that firstly, the motor drives the screen to rotate, and the dead weight of pulverized coal and sundries on the screen is larger, the motor can bear larger load, so that the power consumption loss of the motor is larger, and secondly, if the motor is damaged, the screen cannot be driven to rotate, and the screening of the pulverized coal cannot be completed.
Disclosure of utility model
The utility model aims to solve the problems, designs a self-cleaning self-rotating pulverized coal screen, and solves the problems that the power consumption of a motor is increased and the pulverized coal cannot be screened due to the damage of the motor because of the large dead weight of the pulverized coal in the existing pulverized coal screen.
The technical scheme of the utility model for achieving the purpose is that the self-cleaning pulverized coal screen comprises a screening cylinder, wherein the top of the screening cylinder is provided with a feed inlet, the bottom of the screening cylinder is provided with a discharge outlet, a screening net is transversely arranged in a channel between the feed inlet and the discharge outlet in the screening cylinder, a fan is arranged above the screening net, the fan rotates relative to the central position of the screening net through a rotating shaft, and the side wall of the screening cylinder is provided with at least one air blowing pipe for introducing nitrogen;
The fan comprises a plurality of special-shaped fan blades, each special-shaped fan blade is composed of a fan blade part and a windward part, an included angle is formed between the fan blade part and the windward part, the bottom surface of the windward part is close to the screening net, the blowing direction of the blowing pipe and the windward part of each special-shaped fan blade are arranged at an included angle, and the fan can be blown to rotate by blowing air to the windward part through the air inlet pipe.
Preferably, the fan further comprises a rotating member, and the plurality of special-shaped fan blades are fixed on the rotating member in an annular array.
Preferably, the rotating piece is fixedly connected with the rotating shaft, and the upper end and the lower end of the rotating shaft are respectively connected with the top of the screening cylinder and the screening net in a rotating way through bearings.
Preferably, the rotating piece is rotationally connected with the rotating shaft, and the upper end and the lower end of the rotating shaft are respectively and fixedly connected with the top of the screening cylinder and the screening net.
Preferably, one end of the special-shaped fan blades, which is far away from the rotating piece, is close to the inner wall of the screening cylinder.
Preferably, a flange is arranged on the circumference direction of the screening net, one end of the special-shaped fan blade, which is far away from the rotating piece, is close to the inner wall of the flange, and one end of the air blowing pipe sequentially penetrates through the screening cylinder and the flange.
Preferably, the top of screening section of thick bamboo still is provided with the clearance mouth, clearance mouth department is provided with flip, flip rotates with screening section of thick bamboo and is connected, be provided with locking device on the flip, flip passes through locking device and screening section of thick bamboo.
Compared with the prior art, the beneficial effects are that:
The utility model has the advantages of simple structure, good filtering performance and the like, compressed nitrogen is sprayed to the blades of the fan through the air blowing pipe, so that the fan is driven to rotate, and the pulverized coal on the screening net can be scraped uniformly when the fan rotates, so that the screening net can rapidly filter the pulverized coal, the pulverized coal is prevented from being accumulated on the screening net, the filtering efficiency of the filtered pulverized coal sieve is influenced, the fan is not required to be driven to rotate by a motor, the energy consumption of the pulverized coal sieve can be reduced, the filtering effect is obviously improved, and the compressed nitrogen can also prevent the pulverized coal in the pulverized coal sieve from spontaneous combustion.
Drawings
FIG. 1 is a schematic cross-sectional structure of embodiment 1 of the present utility model;
fig. 2 is a schematic structural view of a fan in embodiment 1;
FIG. 3 is a schematic cross-sectional structure of embodiment 2;
Fig. 4 is a schematic view of the structure of the flange in embodiment 2.
In the figure, 1, a sieving cylinder; 101. a feed inlet; 102. a discharge port; 103. cleaning the mouth; 2. screening net; 3. a fan; 31. a rotating member; 32. special-shaped fan blades; 321. a blade section; 322. a windward part; 4. a rotating shaft; 5. a flip cover; 6. a locking device; 7. a flange; 8. and (3) an air blowing pipe.
Detailed Description
The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Example 1
As shown in fig. 1, the self-cleaning pulverized coal screen mainly comprises a screening cylinder 1, a screening net 2, a fan 3, an air blowing pipe 8 and other parts, wherein a feed inlet 101 and a cleaning opening 103 are arranged at the top of the screening cylinder 1, the lower end of the screening cylinder 1 is conical, a discharge opening 102 is arranged at the bottom of the screening cylinder 1, the screening net 2 is arranged inside the screening cylinder 1 and transversely passes through a channel between the feed inlet 101 and the discharge opening 102, the feed inlet 101 is connected with a feed pipeline of pulverized coal, the discharge opening 102 is connected with a discharge pipeline of the pulverized coal, the fan 3 is arranged above the screening net 2, the air blowing pipe 8 is arranged on a shell of the screening cylinder 1, the pulverized coal mixed with impurities can pass through the feed pipeline and is tightly arranged in the screening cylinder 1, the air blowing pipe 8 can blow compressed nitrogen to the blades of the fan 3 to drive the fan 3 to rotate, the fan 3 can uniformly lay the pulverized coal on the screening net 2, the pulverized coal is separated from the impurities through the screening net 2, finally filtered pulverized coal can flow into the discharge pipeline from the discharge opening 102, and then the discharge pipeline is used for cleaning the impurities on the lower screening net 2.
As shown in fig. 2, the fan 3 mainly comprises a rotating member 31 and a plurality of special-shaped fan blades 32, wherein the plurality of special-shaped fan blades 32 are distributed on the outer circumference of the rotating member 31 in a ring-shaped array and are fixedly connected with the rotating member 31, a rotating shaft 4 is arranged in the middle of the rotating member 31, the upper end and the lower end of the rotating shaft 4 are respectively and rotatably connected with the top of the screening drum 1 and the central position of the screening net 2 through bearings, and the rotating member 31 is fixedly connected with the rotating shaft 4, so that the fan 3 can rotate along with the rotating shaft 4; of course, the upper and lower ends of the rotating shaft 4 may be fixedly connected with the top of the screening cylinder 1 and the center of the screening net 2, and the rotating member 31 is rotatably connected with the rotating shaft 4, so that the rotating shaft 4 does not rotate, and the fan 3 may rotate relative to the rotating shaft 4.
Referring to fig. 2, the special-shaped fan blade 32 mainly comprises a fan blade portion 321 and a windward portion 322, wherein the fan blade portion 321 and the windward portion 322 are arranged at a certain included angle, the windward portion 322 is located at the bottom of the fan blade portion 321, a certain included angle is formed between the windward portion 322 and the screening net 2, and the bottom surface of the windward portion 322 is close to the surface of the screening net 2, so that when the air blowing pipe 8 blows air to the windward portion 322 of the special-shaped fan blade 32, nitrogen can be reduced to flow out from the bottom of the windward portion 322 as much as possible, and the fan 3 can obtain larger power rotation as much as possible.
Referring to fig. 1, at least one air blowing pipe 8 is arranged on the side wall of the sieving barrel 1, the number of the air blowing pipes 8 is variable, and a certain included angle is formed between the air blowing direction of the air blowing pipes 8 and the windward part 322 of the special-shaped fan blade 32, that is, the air blowing pipes 8 are obliquely arranged and fixed on the shell of the sieving barrel 1, so that compressed nitrogen blown by the air blowing pipes 8 can impact on the windward part 322 of the special-shaped fan blade 32, and therefore the fan 3 can be blown to rotate, otherwise, the fan 3 can not be blown to rotate; when the fan 3 rotates, the windward part 322 at the bottom can scrape the pulverized coal uniformly, so that the pulverized coal can pass through the screening net 2, and meanwhile, the windward part 322 of the special-shaped fan blades 32 can scrape sundries out of the screening net 2.
The special-shaped fan blades 32 are close to the inner wall of the screening cylinder 1 at the end far away from the rotating piece 31, so that the outflow of coal dust from gaps between the special-shaped fan blades 32 and the inner wall of the screening cylinder 1 can be reduced as much as possible when the fan 3 rotates.
Compressed nitrogen blown out by the air blowing pipe 8 can be blown to the windward part 322 of the special-shaped fan blade 32, and the nitrogen has two functions from blowing the fan 3, namely, the nitrogen can provide rotating power for the fan 3, and the nitrogen is inert gas, so that the nitrogen can replace air in the screening cylinder 1 to prevent spontaneous combustion of pulverized coal in the pulverized coal screen.
Referring to fig. 1, a flip cover 5 is disposed at a cleaning opening 103 at the top of a screening drum 1, one side of the flip cover 5 is rotatably connected with the screening drum 1, the other side of the flip cover 5 is connected with the screening drum 1 through a locking device 6, when the pulverized coal is screened, impurities can be left on a screening net 2, the locking device 6 can be unlocked at this time, then the flip cover 5 is opened, the impurities on the screening net 2 in the screening drum 1 are manually cleaned from the cleaning opening 103, and the filtering effect of the screening net 2 is prevented from being excessively influenced by the accumulation of the impurities.
Example 2
As shown in fig. 3 and fig. 4, the difference between this embodiment and embodiment 1 is that a flange 7 is further disposed along the circumferential direction of the screening net 2, at this time, one end of the special-shaped fan blade 32 away from the rotating member 31 may be close to the inner wall of the flange 7, one end of the air blowing pipe 8 sequentially passes through the screening cylinder 1 and the flange 7, the air blowing direction still forms a certain included angle with the windward portion 322 of the special-shaped fan blade 32, and since the pulverized coal containing impurities will wear with the inner wall of the screening cylinder 1 during the operation of the pulverized coal screen, the service life of the screening cylinder 1 will be affected, so that the pulverized coal and the inner wall of the screening cylinder 1 will be separated by the flange 7, and the flange 7 may be replaced after wear, without wearing the inner wall of the screening cylinder 1.
The above technical solution only represents the preferred technical solution of the present utility model, and some changes that may be made by those skilled in the art to some parts of the technical solution represent the principles of the present utility model, and the technical solution falls within the scope of the present utility model.
Claims (7)
1. The utility model provides a rotation is from cleaning coal powder sieve, includes screening section of thick bamboo (1), the top of screening section of thick bamboo (1) is provided with feed inlet (101), and the bottom is provided with discharge gate (102), cross section is provided with screening net (2) in the passageway that lies in between feed inlet (101) and discharge gate (102) in screening section of thick bamboo (1), a serial communication port, the top of screening net (2) is provided with fan (3), fan (3) through pivot (4) with the central point of screening net (2) puts relative rotation, be provided with at least one air blast pipe (8) that supplies nitrogen gas to let in on the lateral wall of screening section of thick bamboo (1);
The fan (3) at least comprises a plurality of special-shaped fan blades (32), each special-shaped fan blade (32) comprises a fan blade part (321) and a windward part (322), an included angle is formed between each fan blade part (321) and each windward part (322), the bottom surface of each windward part (322) is close to the screening net (2), the blowing direction of the blowing pipe (8) and the windward parts (322) of the special-shaped fan blades (32) are arranged at an included angle, and the fan (3) can be blown to rotate by blowing to the windward parts (322) through the air inlet pipe.
2. The autorotation self-cleaning pulverized coal screen according to claim 1, wherein the fan (3) further comprises a rotating member (31), and the plurality of special-shaped fan blades (32) are fixed on the rotating member (31) in an annular array.
3. The autorotation self-cleaning pulverized coal screen according to claim 2, wherein the rotating piece (31) is fixedly connected with the rotating shaft (4), and the upper end and the lower end of the rotating shaft (4) are respectively and rotatably connected with the top of the screening cylinder (1) and the screening net (2) through bearings.
4. The autorotation self-cleaning pulverized coal screen according to claim 2, wherein the rotating piece (31) is rotationally connected with the rotating shaft (4), and the upper end and the lower end of the rotating shaft (4) are fixedly connected with the top of the screening cylinder (1) and the screening net (2) respectively.
5. The autorotation self-cleaning pulverized coal screen as claimed in claim 2, wherein one end of the special-shaped fan blades (32) far away from the rotating piece (31) is close to the inner wall of the screening cylinder (1).
6. The autorotation self-cleaning pulverized coal screen according to claim 2, characterized in that a flange (7) is arranged on the circumference direction of the screening net (2), one end of the special-shaped fan blade (32) far away from the rotating piece (31) is close to the inner wall of the flange (7), and one end of the air blowing pipe (8) sequentially penetrates through the screening cylinder (1) and the flange (7).
7. The autorotation self-cleaning pulverized coal screen according to claim 1, characterized in that a cleaning opening (103) is further formed in the top of the screening barrel (1), a flip cover (5) is arranged at the cleaning opening (103), the flip cover (5) is rotationally connected with the screening barrel (1), a locking device (6) is arranged on the flip cover (5), and the flip cover (5) is connected with the screening barrel (1) through the locking device (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322345178.7U CN220836480U (en) | 2023-08-30 | 2023-08-30 | Self-cleaning pulverized coal screen capable of rotating automatically |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322345178.7U CN220836480U (en) | 2023-08-30 | 2023-08-30 | Self-cleaning pulverized coal screen capable of rotating automatically |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220836480U true CN220836480U (en) | 2024-04-26 |
Family
ID=90747635
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322345178.7U Active CN220836480U (en) | 2023-08-30 | 2023-08-30 | Self-cleaning pulverized coal screen capable of rotating automatically |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220836480U (en) |
-
2023
- 2023-08-30 CN CN202322345178.7U patent/CN220836480U/en active Active
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