CN212791460U - Powder separator - Google Patents

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Publication number
CN212791460U
CN212791460U CN202020690907.6U CN202020690907U CN212791460U CN 212791460 U CN212791460 U CN 212791460U CN 202020690907 U CN202020690907 U CN 202020690907U CN 212791460 U CN212791460 U CN 212791460U
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China
Prior art keywords
cone
powder
pipe
central cylinder
circular truncated
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CN202020690907.6U
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Chinese (zh)
Inventor
石战胜
彭丽
马治安
敬旭业
刘袖
徐波
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Huadian Electric Power Research Institute Co Ltd
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Huadian Electric Power Research Institute Co Ltd
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Priority to CN202020690907.6U priority Critical patent/CN212791460U/en
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Abstract

The utility model discloses a powder separator, which comprises an inlet pipe, a powder return pipe, an outer cone, an inner cone and an outlet pipe; the inner cone and the outer cone are both of hollow inverted cone structures, the inner cone is positioned in the outer cone, an annular cavity is formed between the inner wall of the outer cone and the outer wall of the inner cone, the powder return pipe and the inlet pipe are connected to the lower end of the outer cone, and the outlet pipe is connected to the upper end of the outer cone; a central cylinder is arranged in the inner cone, the upper end opening of the central cylinder is arranged corresponding to the outlet pipe, and a shutter is arranged at the upper end of the central cylinder; the lower extreme of interior cone is provided with the airlock and in order to prevent interior awl wearing and tearing and the more efficient interior cone cap of striking separation, airlock and interior cone cap are located the top of import pipe, and the inner wall of outer cone is provided with the couple that is arranged in the soft impurity of adhesion buggy. The utility model provides a soft material block up, interior cone wearing and tearing, separation efficiency scheduling problem not high, improved the separation performance.

Description

Powder separator
Technical Field
The utility model relates to a corollary equipment fields such as thermal power generation, cement, chemical industry, metallurgy especially relate to a coal fired power plant powder process system's powder separating centrifuge.
Background
The coarse powder separator is a key device for grading materials according to fineness in a powder making system, and has the function of taking out powder meeting the fineness requirement, separating out unqualified coarse powder and returning the unqualified coarse powder to the powder making system for re-grinding. The coarse powder separator is widely applied to power plants, cement, chemical industry and metallurgy industry. At present, the coarse powder separation technology used by a coal-fired power plant pulverizing system in China has a part of foreign radial separation technology used, and due to the original design defects, the problems of low efficiency, thick coal powder, poor coal powder uniformity, easy blockage by soft substances and the like are caused.
SUMMERY OF THE UTILITY MODEL
The coal dust separator aims to solve the problems that the separator is low in efficiency, thick in coal dust, poor in coal dust uniformity, easy to block by soft materials and the like. The utility model provides a powder separating centrifuge has installed the couple that is the circumference and arranges, has increased centrifugal rotating vane, shutter, has improved interior cone cap etc. through changing the flow field, blockking or drive soft debris, increase one-level separation and reducing wear and improving separation performance.
The utility model provides a technical scheme that above-mentioned problem adopted is: the utility model provides a powder separating centrifuge which characterized in that: comprises an inlet pipe, a powder return pipe, an outer cone, an inner cone and an outlet pipe; the inner cone and the outer cone are both of hollow inverted cone structures, the inner cone is positioned in the outer cone, an annular cavity is formed between the inner wall of the outer cone and the outer wall of the inner cone, the powder return pipe and the inlet pipe are connected to the lower end of the outer cone, and the outlet pipe is connected to the upper end of the outer cone; a central cylinder is arranged in the inner cone, an upper end opening of the central cylinder is arranged corresponding to the outlet pipe, and a shutter is arranged at the upper end of the central cylinder; the lower extreme of interior cone is provided with the airlock and in order to prevent interior awl wearing and tearing and the more efficient interior cone cap of striking separation, airlock and interior cone cap are located the top of import pipe, the inner wall of outer cone is provided with the couple that is arranged in the soft impurity of adhesion buggy.
Furthermore, the outer cone, the inner cone, the central cylinder and the inlet pipe are coaxially arranged, the upper end of the inlet pipe is connected with an inlet expanding cone, the top end of the outer cone is located above the top end of the inner cone, a plurality of radial baffles are vertically arranged at the top of the inner cone and are uniformly arranged in the circumferential direction, and the radial baffles are connected with an adjusting shaft on a top cover at the top end of the outer cone.
Furthermore, the inner cone cap can be formed by combining a circular truncated cone with a large upper part and a small lower part and an inverted cone, the central lines of the circular truncated cone and the inverted cone are overlapped, and the area of the lower surface of the circular truncated cone is larger than that of the upper surface of the inverted cone; or the inner cone cap can also be formed by combining a circular table with a large upper part and a small lower part and an inverted circular table, the central lines of the circular table and the inverted circular table are overlapped, and the area of the lower surface of the circular table is required to be larger than that of the upper surface of the inverted circular table; the round platform, the inverted cone and the inverted round platform in the inner cone cap can be replaced. The inner cone cap has the functions of good flow guide, reduction of abrasion of the inner cone and the outer cone and the like, and can be matched with the hook to reduce blockage of the radial baffle by soft substances.
Furthermore, the hooks are uniformly distributed on the inner wall surface of the outer cone, and the number of the hooks is 18-30.
Further, a centrifugal rotating blade for generating centrifugal force and a central shaft for guiding and fixing the centrifugal rotating blade are arranged in the central cylinder; the centrifugal rotating blades are uniformly distributed along the circumferential direction of the central shaft; the number of the centrifugal rotating blades is 3-10, and the centrifugal rotating blades can play a role in homogenizing a flow field.
Further, the louver is arranged above the centrifugal rotating blades and comprises vertical blades which are vertically arranged, the number of the vertical blades is 6-20, and the tangential direction of the vertical blades is consistent with the direction of the centrifugal rotating blades.
Furthermore, an observation hole for monitoring the blocking condition is arranged on the side wall of the powder return pipe, so that the powder return pipe can be cleaned in time.
Compared with the prior art, the utility model, have following advantage and effect:
(1) the centrifugal rotating blades and the shutters are added to improve the separation efficiency, the concentration of powder at the outlet is more uniform, soft substances entering the central cylinder are smashed, and the soft substances are prevented from blocking the burner after entering the burner.
(2) A novel inner cone cap is designed, the flow field is changed, the abrasion of an inner cone body is reduced, and the hook is matched to reduce the blockage of soft materials on the radial baffle.
(3) The radial baffle can realize the superfine coal powder without being adjusted to a too small angle.
Drawings
FIG. 1 is a schematic structural diagram of a powder separator according to an embodiment of the present invention;
FIG. 2 is a first schematic structural view of a centrifugal rotor blade according to the present invention;
FIG. 3 is a second schematic view of the centrifugal rotor blade according to the present invention;
FIG. 4 is a schematic view of the structure of the blind of the present invention;
FIG. 5 is a first structural schematic diagram of the middle cone cap of the present invention;
FIG. 6 is a second structural diagram of the inner cone cap of the present invention;
in the figure: an inlet pipe 1, an observation hole 2, a powder return pipe 3, an inlet expanding cone 4, an inner cone cap 5, an air locker 6, a hook 7, an outer cone 8, an inner cone 9, a central cylinder 10, a central shaft 11, centrifugal rotating blades 12, a shutter 13, a top cover 14, a radial baffle 15, an adjusting shaft 16, an outlet pipe 17, a powder outlet pipe 3, a powder outlet pipe, a,
A circular truncated cone 51, an inverted cone 52, an inverted circular truncated cone 53,
Twisted blades 121, horizontal fan-shaped blades 122,
The vertical blades 131.
Detailed Description
The present invention will be described in further detail by way of examples with reference to the accompanying drawings, which are illustrative of the present invention and are not intended to limit the present invention.
The utility model provides a powder separator, which comprises an inlet pipe 1, a powder return pipe 3, an outer cone 8, an inner cone 9 and an outlet pipe 17; the inner cone 9 and the outer cone 8 are both hollow inverted cone-shaped structures, the inner cone 9 is positioned in the outer cone 8, an annular cavity is formed between the inner wall of the outer cone 8 and the outer wall of the inner cone 9, the powder return pipe 3 and the inlet pipe 1 are connected to the lower end of the outer cone 8, and the outlet pipe 17 is connected to the upper end of the outer cone 8; a central cylinder 10 is arranged in the inner cone 9, the upper end port of the central cylinder 10 is arranged corresponding to the outlet pipe 17, and the upper end of the central cylinder 10 is provided with a shutter 13; the lower end of the inner cone 9 is provided with an air lock 6 and an inner cone cap 5 for preventing the inner cone from being worn and separating by impact more efficiently, the air lock 6 and the inner cone cap 5 are positioned above the inlet pipe 1, and the inner wall of the outer cone 8 is provided with a hook 7 for adhering soft impurities doped in the pulverized coal, as shown in fig. 1.
The outer cone 8, the inner cone 9, the central cylinder 10 and the inlet pipe 1 are coaxially arranged, the upper end of the inlet pipe 1 is connected with an inlet expanding cone 4, the top end of the outer cone 8 is located above the top end of the inner cone 9, the top of the inner cone 9 is vertically provided with a plurality of radial baffles 15, the radial baffles 15 are uniformly arranged in the circumferential direction, and the radial baffles 15 are connected with an adjusting shaft 16 on a top cover 14 at the top end of the outer cone 8, as shown in fig. 1.
Specifically, the inner cone cap 5 may be formed by combining a circular truncated cone 51 with a large upper part and a small lower part and an inverted cone 52, and the central lines of the circular truncated cone 51 and the inverted cone 52 are overlapped, and the area of the lower surface of the circular truncated cone 51 must be larger than the area of the upper surface of the inverted cone 52; the inner cone cap 5 can also be formed by combining a circular truncated cone 51 with a large upper part and a small lower part and an inverted circular truncated cone 53, the central lines of the circular truncated cone 51 and the inverted circular truncated cone 53 are overlapped, and the area of the lower surface of the circular truncated cone 51 is required to be larger than that of the upper surface of the inverted circular truncated cone 53; the circular truncated cone 51, the inverted cone 52 and the inverted circular truncated cone 53 in the inner conical cap 5 can be replaced. The inner cone cap 5 has good flow guiding and reduces the abrasion of the inner cone and the outer cone, and can be matched with the hook 7 to reduce the blockage of the radial baffle 15 by soft substances, as shown in fig. 5 to 6.
The hooks 7 are uniformly distributed on the inner wall surface of the outer cone 8, the hooks 7 are of a cylindrical or plate-shaped structure, and the number of the hooks 7 is 18-30, as shown in fig. 1.
A centrifugal rotating blade 12 for generating centrifugal force and a central shaft 11 for guiding and fixing the centrifugal rotating blade 12 are arranged in the central cylinder 10; the centrifugal rotating blades 12 are uniformly distributed along the circumferential direction of the central shaft 11; the centrifugal rotating blades 12 are 3-10 in number, and may be in the shape of twisted blades 121 or horizontal fan-shaped blades 122, which mainly generate a rotating airflow and enable coarse powder particles to be separated under the centrifugal force of the rotating airflow, as shown in fig. 1-3.
The louver 13 is arranged above the centrifugal rotating blades 12, the louver 13 comprises vertical blades 131 which are vertically arranged, the number of the vertical blades 131 is 6-20, and the vertical blades 131 can be in a straight plate shape or an arc shape, as shown in fig. 1 and 4.
An observation hole 2 for monitoring the blocking condition is arranged on the side wall of the powder return pipe 3, and impurities at the reducing part of the powder return pipe 3 can be cleaned by opening, as shown in figure 1.
The following describes an embodiment of the powder separator:
the first method is as follows: pulverized coal and solid powder pass through the inlet pipe 1 at a certain speed, enter an annular cavity formed by the inner cone 9 and the outer cone 8 through the inlet expanding cone 4, the pulverized coal and air flow collide with the inner cone cap 5, the soft material is hung on the hook 7 through flow guiding, and the thicker pulverized coal touches the side wall of the outer cone 9 and falls into the powder return pipe 3 along the wall surface under the action of gravity; the rest coal powder continuously rises along the annular cavity, tangentially enters the radial baffle 15 to generate rotational flow, the coal powder is further centrifugally separated, thicker coal powder is separated along the inner wall of the inner cone 9, the coal powder containing part of coarse powder can be broken by the central cylinder 10 to separate soft impurities again, the thicker coal powder is separated from the shutter 13, the coal powder separated twice enters the built-in air locker 6, when the material in the air locker 6 is accumulated to a certain degree, the air locker is opened to enable the material to fall into the powder return pipe 3, and qualified coal powder is discharged from the outlet pipe 17 through the central cylinder 10.
The second method comprises the following steps: pulverized coal and solid powder pass through the inlet pipe 1 at a certain speed, enter an annular cavity formed by the inner cone 9 and the outer cone 8 through the inlet expanding cone 4, the pulverized coal and air flow collide with the inner cone cap 5, the soft material is hung on the hook 7 through flow guiding, and the thicker pulverized coal touches the side wall of the outer cone 9 and falls into the powder return pipe 3 along the wall surface under the action of gravity; the rest coal powder continuously rises along the annular cavity, tangentially enters the radial baffle 15 to generate rotational flow, the coal powder is further centrifugally separated, thicker coal powder is separated along the inner wall of the inner cone 9, when the materials in the air locker 6 are accumulated to a certain degree, the materials are opened to fall into the powder return pipe 3, and qualified coal powder is discharged from the outlet pipe 17 through the central cylinder 10.
The third method comprises the following steps: pulverized coal and solid powder pass through the inlet pipe 1 at a certain speed and enter an annular cavity formed by the inner cone 9 and the outer cone 8 through the inlet expanding cone 4, the pulverized coal and air flow collide with the inner cone cap 5, and the thicker pulverized coal collides with the side wall of the outer cone 9 and falls into the powder return pipe 3 along the wall surface under the action of gravity; the rest coal powder continuously rises along the annular cavity, tangentially enters the radial baffle 15 to generate rotational flow, the coal powder is further centrifugally separated, thicker coal powder is separated along the inner wall of the inner cone 9, the coal powder containing part of coarse powder can be broken by the central cylinder 10 to separate soft impurities again, the thicker coal powder is separated from the shutter 13, the coal powder separated twice enters the built-in air locker 6, when the material in the air locker 6 is accumulated to a certain degree, the air locker is opened to enable the material to fall into the powder return pipe 3, and qualified coal powder is discharged from the outlet pipe 17 through the central cylinder 10.
Those not described in detail in this specification are well within the skill of the art.
In addition, it should be noted that the above contents described in the present specification are only illustrations of the structure of the present invention. All equivalent changes made according to the structure, characteristics and principle of the inventive concept are included in the protection scope of the present invention. Various modifications, additions and substitutions by those skilled in the art may be made to the described embodiments without departing from the scope of the invention as defined in the accompanying claims.

Claims (7)

1. The utility model provides a powder separating centrifuge which characterized in that: comprises an inlet pipe (1), a powder return pipe (3), an outer cone (8), an inner cone (9) and an outlet pipe (17); the powder recycling device is characterized in that the inner cone (9) and the outer cone (8) are both of hollow inverted cone-shaped structures, the inner cone (9) is located in the outer cone (8), an annular cavity is formed between the inner wall of the outer cone (8) and the outer wall of the inner cone (9), the powder recycling pipe (3) and the inlet pipe (1) are connected to the lower end of the outer cone (8), and the outlet pipe (17) is connected to the upper end of the outer cone (8); a central cylinder (10) is arranged in the inner cone (9), an upper end opening of the central cylinder (10) is arranged corresponding to the outlet pipe (17), and a shutter (13) is arranged at the upper end of the central cylinder (10); the lower extreme of interior cone (9) is provided with airlock (6) and interior cone cap (5), airlock (6) and interior cone cap (5) are located the top of import pipe (1), the inner wall of outer cone (8) is provided with couple (7).
2. The powder separator according to claim 1, wherein: the outer cone (8), the inner cone (9), the central cylinder (10) and the inlet pipe (1) are coaxially arranged, the upper end of the inlet pipe (1) is connected with an inlet expanding cone (4), the top end of the outer cone (8) is located above the top end of the inner cone (9), a plurality of radial baffles (15) are vertically arranged at the top of the inner cone (9) and are uniformly arranged in the circumferential direction, and the radial baffles (15) are connected with adjusting shafts (16) on a top cover (14) at the top end of the outer cone (8).
3. The powder separator according to claim 1, wherein: the inner cone cap (5) is formed by combining a circular truncated cone (51) and an inverted cone (52), and the area of the lower surface of the circular truncated cone (51) is larger than that of the upper surface of the inverted cone (52); or the inner cone cap (5) is formed by combining a circular truncated cone (51) and an inverted circular truncated cone (53), and the area of the lower surface of the circular truncated cone (51) is larger than that of the upper surface of the inverted circular truncated cone (53).
4. The powder separator according to claim 1, wherein: the hooks (7) are uniformly distributed on the inner wall surface of the outer cone (8), and the number of the hooks (7) is 18-30.
5. The powder separator according to claim 1, wherein: a centrifugal rotating blade (12) for generating centrifugal force and a central shaft (11) for guiding and fixing the centrifugal rotating blade (12) are arranged in the central cylinder (10); the centrifugal rotating blades (12) are uniformly distributed along the central shaft (11) in the circumferential direction; the number of the centrifugal rotating blades (12) is 3-10.
6. The powder separator according to claim 1 or 5, wherein: the louver (13) is arranged above the centrifugal rotating blades (12), the louver (13) comprises vertical blades (131) which are vertically arranged, and the number of the vertical blades (131) is 6-20.
7. The powder separator according to claim 1, wherein: and an observation hole (2) for monitoring the blocking condition is formed in the side wall of the powder return pipe (3).
CN202020690907.6U 2020-04-29 2020-04-29 Powder separator Active CN212791460U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202020690907.6U CN212791460U (en) 2020-04-29 2020-04-29 Powder separator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202020690907.6U CN212791460U (en) 2020-04-29 2020-04-29 Powder separator

Publications (1)

Publication Number Publication Date
CN212791460U true CN212791460U (en) 2021-03-26

Family

ID=75092623

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202020690907.6U Active CN212791460U (en) 2020-04-29 2020-04-29 Powder separator

Country Status (1)

Country Link
CN (1) CN212791460U (en)

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