CN211359168U - Primary air chamber guiding device of medium-speed coal mill - Google Patents
Primary air chamber guiding device of medium-speed coal mill Download PDFInfo
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- CN211359168U CN211359168U CN201922385113.9U CN201922385113U CN211359168U CN 211359168 U CN211359168 U CN 211359168U CN 201922385113 U CN201922385113 U CN 201922385113U CN 211359168 U CN211359168 U CN 211359168U
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Abstract
A primary air chamber guide device of a medium-speed coal mill relates to the technical field of medium-speed coal mills. The problems that the air speed and the air quantity inside a primary air chamber are uneven, the internal flow field is disordered and the phenomenon of turbulent flow can occur under the working condition that the conventional medium-speed coal mill runs for a long time to prepare powder, the wall of a coal mill cylinder at a single local part inside the coal mill and the non-working surface of a coal mill grinding roller are seriously worn and the maintenance workload is increased are solved. The middle speed coal mill is characterized in that a guide unit is arranged in a primary air chamber of the middle speed coal mill, one end of an adjusting handle is connected with the guide unit, a sealing box is in a cuboid shape with one open end, a long-strip through hole is formed in the side face of the sealing box, the sealing box is arranged on a shell of the middle speed coal mill and penetrates through the shell of the middle speed coal mill to extend into the primary air chamber, and the other end of the adjusting handle penetrates through the shell of the middle speed coal mill and the long-strip through hole in the sealing box. The utility model is suitable for an adjust wind direction and wind speed in the plenum of medium speed pulverizer.
Description
Technical Field
The utility model relates to a medium speed pulverizer technical field, concretely relates to plenum guider of medium speed pulverizer.
Background
The existing medium-speed coal mill has the phenomena of primary wind chamber internal wind speed, wind quantity unevenness, internal flow field disorder and 'turbulent flow' under the working condition of powder preparation in long-time operation, and further has the serious abrasion condition of the coal mill cylinder wall at a single local certain position in the coal mill and the non-working surface of the coal mill grinding roller. The main reasons are that the primary air enters the primary air chamber of the coal mill to generate split flow and uneven flow direction, and is gathered at a certain point, the air volume at the gathering position is large, the air speed is high, when the primary air at the gathering position carries pulverized coal to operate at high air volume and high air speed, the primary air at the upper part of the primary air chamber of the medium-speed coal mill can be gathered at a local outlet of the air ring, the wind direction is deviated, the air speed is ultrahigh, and strong local blowing is realized, so that the abrasion at the outer side, the cylinder wall and other positions of a grinding roller of the coal mill in the corresponding direction is serious, the service life of the cylinder.
In summary, under the working condition of milling for a long time, the existing medium speed coal mill has the phenomena of uneven wind speed and wind quantity in the primary wind chamber, disorder and turbulent flow in the internal flow field, and further has the problems that the wall of a coal mill cylinder at a single local part in the coal mill and the non-working surface of the coal mill grinding roller are seriously worn and the maintenance workload is increased.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a solve current medium speed pulverizer under the operating mode condition of long-time operation powder process, the phenomenon of the inside wind speed of plenum, the uneven and interior flow field of amount of wind of can appearing, "turbulent flow", and then serious wearing and tearing appear in the coal pulverizer section of thick bamboo wall that can appear the inside single local somewhere of coal pulverizer, the non-working face of coal pulverizer grinding roller to increase the problem of overhauing work load, and provide a plenum guider of medium speed pulverizer.
The utility model discloses a primary air chamber guiding device of a medium speed coal mill, which comprises a sealing box, an adjusting handle and a guiding unit;
a guide unit is arranged in a primary air chamber of the medium-speed coal mill, one end of an adjusting handle is connected with the guide unit, a sealing box is in a cuboid shape with one open end, a long-strip through hole is formed in the side face of the sealing box, the sealing box is arranged on a shell of the medium-speed coal mill, the sealing box penetrates through the shell of the medium-speed coal mill and extends into the primary air chamber, and the other end of the adjusting handle penetrates through the shell of the medium-speed coal mill and the long-strip through hole in the sealing box at one;
furthermore, the guide unit is arranged between the primary air chamber of the medium-speed coal mill and the scraper device of the medium-speed coal mill;
furthermore, the guide unit comprises a baffle and a rotating shaft, and the rotating shaft is provided with the baffle along the direction of the outer wall of the circumference;
furthermore, the rotating shaft is vertically arranged inside the sealing box, and one end of the adjusting handle is fixedly connected with the middle part of the outer wall of the rotating shaft;
furthermore, the baffle is an arc baffle, and the radian of the baffle is 10 degrees;
furthermore, the baffle plates are multi-surface folding baffle plates, and the included angle between the folding surfaces is 120-150 degrees;
further, the baffle is a parabolic baffle;
furthermore, the baffle is a fish scale type baffle;
furthermore, a medium-speed coal mill is one of important equipment of a thermal power plant, a primary air chamber of the medium-speed coal mill is a key component of the medium-speed coal mill, and the uniformity of primary air speed and air volume in the medium-speed coal mill directly influences the internal flow field of the coal mill, the carrying capacity of pulverized coal and the service life of a grinding device of the coal mill and the wall of a cylinder of the coal mill;
the guide unit is a component of a primary air chamber of the medium-speed coal mill, the guide unit of the primary air chamber runs at a higher temperature and bears a larger primary air speed and the scouring abrasion of pebble coal discharged by the coal mill, so that the guide device of the primary air chamber is required to have good high-temperature wear resistance;
the guide unit in the primary air chamber can be adjusted by swinging the adjusting handle according to the air volume, the air speed, the flow direction and the like of each position of the primary air chamber of the medium-speed coal mill, and the air volume, the air speed and the flow direction in the primary air chamber of the medium-speed coal mill can be in a fully uniform and reasonable state after adjustment, so that the air ring enters the middle frame body area of the medium-speed coal mill.
Compared with the prior art, the utility model following beneficial effect has:
one, the utility model overcomes prior art's shortcoming is equipped with the guide unit in the primary plenum of adoption medium speed pulverizer, adjustment handle's one end and guide unit connection, adjustment handle's the other end once passes the rectangular through-hole on medium speed pulverizer's shell and the seal box, and the staff passes through wind speed and wind direction in the primary plenum of adjustment handle adjustment, avoids the phenomenon of inside flow field disorder, "turbulent flow", prevents that the coal pulverizer section of thick bamboo wall, the non-working face of coal pulverizer grinding roller from appearing serious wearing and tearing.
Two, the utility model discloses a guide unit can prevent that the phenomenon of wearing and tearing from appearing in the internal member of medium speed pulverizer, reduces maintenance work load, improves work efficiency.
Thirdly, the utility model is simple in operation and convenient in use.
Drawings
Fig. 1 is a structural sectional view of a primary air chamber guide device of a medium speed coal mill according to the present invention;
fig. 2 is a front view of an arc baffle plate in the guiding device of the primary air chamber of the medium speed coal mill according to the present invention;
fig. 3 is a top view of an arc baffle plate in the guiding device of the primary air chamber of the medium speed coal mill according to the present invention;
fig. 4 is a front view of a multi-surface folding baffle plate in the primary air chamber guiding device of the medium speed coal mill of the present invention;
fig. 5 is a top view of a multi-surface folding baffle plate in the primary air chamber guiding device of the medium speed coal mill of the present invention;
fig. 6 is a front view of a parabolic baffle plate in the primary air chamber guide device of the medium speed coal mill according to the present invention;
fig. 7 is a top view of the parabolic baffle of the guiding device for the primary air chamber of the medium speed coal mill according to the present invention;
fig. 8 is a front view of a fish scale type baffle plate in the primary air chamber guiding device of the medium speed coal mill of the present invention;
fig. 9 is a top view of the fish scale type baffle plate in the primary air chamber guiding device of the medium speed coal mill of the present invention.
Detailed Description
The first embodiment is as follows: the embodiment is described with reference to fig. 1, and the primary air chamber guiding device of the medium speed coal mill in the embodiment comprises a sealing box 2, an adjusting handle 3 and a guiding unit 4;
a guide unit 4 is arranged in a primary air chamber 1 of the medium-speed coal mill, one end of an adjusting handle 3 is connected with the guide unit 4, a sealing box 2 is in a cuboid shape with one open end, a long-strip through hole is formed in the side face of the sealing box 2, a sealing box 2 is arranged on a shell of the medium-speed coal mill, the sealing box 2 penetrates through the shell of the medium-speed coal mill and extends into the primary air chamber 1, and the other end of the adjusting handle 3 penetrates through the shell of the medium-speed coal mill and the long-strip through hole in the sealing box 2 at one;
in the specific embodiment, the medium-speed coal mill is one of important equipment of a thermal power plant, the primary air chamber 1 of the medium-speed coal mill is a key component of the medium-speed coal mill, and the uniformity of primary air speed and air volume in the mill in the medium-speed coal mill directly influences the internal flow field of the coal mill, the carrying capacity of pulverized coal and the service life of a milling device of the coal mill and the wall of a cylinder of the coal mill;
the guide unit 4 is a component of the primary air chamber 1 of the medium-speed coal mill, the guide unit 4 of the primary air chamber 1 operates at a higher temperature and bears a larger primary air speed and the scouring abrasion of pebble coal discharged by the coal mill, so that the guide device of the primary air chamber is required to have good high-temperature wear resistance;
the guide unit 4 in the primary air chamber 1 can be adjusted by swinging the adjusting handle 3 according to the air volume, the air speed, the flow direction and the like of each position of the primary air chamber of the medium-speed coal mill, and the air volume, the air speed and the flow direction in the primary air chamber of the medium-speed coal mill can be fully uniform and reasonable after adjustment, so that an air ring enters a middle frame body area of the medium-speed coal mill.
The second embodiment is as follows: the present embodiment will be described with reference to fig. 1, which is a further limitation of the primary air chamber guiding device according to the first embodiment, in the primary air chamber guiding device of the medium speed coal mill according to the present embodiment, the guiding unit 4 is disposed between the primary air chamber 1 of the medium speed coal mill and the scraper device 5 of the medium speed coal mill;
according to the specific embodiment, the guide unit 4 is arranged between the primary air chamber 1 of the medium-speed coal mill and the scraper device 5 of the medium-speed coal mill, the air quantity, the air direction and the air speed inside the primary air chamber of the medium-speed coal mill are uniform, the efficient operation of an air ring of the coal mill can be guaranteed, the operation unit consumption of the coal mill is reduced, and the working efficiency of the coal mill is improved.
The third concrete implementation mode: referring to fig. 2, the present embodiment is described, which is a further limitation of the primary air chamber guiding device according to the second embodiment, in the primary air chamber guiding device of the medium speed coal mill according to the present embodiment, the guiding unit 4 includes a baffle 4-1 and a rotating shaft 4-2, the rotating shaft 4-2 is provided with the baffle 4-1 along the circumferential outer wall direction;
this embodiment adopts the primary plenum of medium speed pulverizer to be equipped with the guide unit, and the one end and the guide unit of adjustment handle are connected, and the other end of adjustment handle once passes the shell of medium speed pulverizer and the rectangular through-hole on the seal box, and the staff passes through the wind speed and the wind direction in the primary plenum of adjustment handle, avoids the phenomenon of inside flow field disorder, "turbulent flow", prevents that the serious wearing and tearing from appearing in the non-working face of coal pulverizer section of thick bamboo wall, coal pulverizer grinding roller.
The fourth concrete implementation mode: referring to fig. 1 and 2, the present embodiment is described, which further defines the primary air chamber guiding device according to the third embodiment, in the primary air chamber guiding device of the medium speed coal mill according to the present embodiment, the rotating shaft 4-2 is vertically arranged inside the sealing box 2, and one end of the adjusting handle 3 is fixedly connected to the middle of the outer wall of the rotating shaft 4-2.
The fifth concrete implementation mode: referring to fig. 2 and 3, the present embodiment is described, which is a further limitation of the primary air chamber guiding device according to the third embodiment, in the primary air chamber guiding device of the medium speed coal mill according to the present embodiment, the baffle 4-1 is an arc-shaped baffle, and the radian of the profile 4-1 is 10 °;
in the specific embodiment, the baffle 4-1 is an arc baffle, the radian of the baffle 4-1 is 10 degrees, the primary air chamber 1 guide device cannot influence the primary air speed and the primary air volume in the primary air chamber 1 of the medium-speed coal mill under the condition of full closing, and the sealing box 2 is arranged outside the coal mill during the design and manufacture of the rotating part, so that the air leakage phenomenon which can occur when the baffle 4-1 is adjusted when the coal mill operates is effectively prevented.
The sixth specific implementation mode: the present embodiment is described with reference to fig. 4 and 5, and the present embodiment is a further limitation to the primary air chamber guiding device according to the third embodiment, in the primary air chamber guiding device of the medium speed coal mill according to the present embodiment, the baffle 4-1 is a multi-surface folding baffle, and an included angle between folding surfaces is 120 ° to 150 °;
in the specific embodiment, the baffle 4-1 is a multi-surface folding baffle, the included angle between the folding surfaces is 120-150 degrees, and the wind direction is adjusted accurately.
The seventh embodiment: the present embodiment will be described with reference to fig. 6 and 7, and the present embodiment is a further limitation of the primary air chamber guiding device according to the third embodiment, in which the baffle 4-1 is a parabolic baffle in the primary air chamber guiding device of the medium speed coal mill according to the present embodiment.
The specific implementation mode is eight: the present embodiment will be described with reference to fig. 8 and 9, and the present embodiment is a further limitation of the primary air chamber guiding device according to the third embodiment, in which the baffle 4-1 is a fish scale type baffle in the primary air chamber guiding device of the medium speed coal mill according to the present embodiment.
The present invention has been disclosed in the above embodiments, but not limited to the present invention, and any person skilled in the art can make some changes or modifications to the equivalent embodiments without departing from the technical scope of the present invention, and any simple modification, equivalent change and modification made by the technical spirit of the present invention to the above embodiments will still belong to the technical scope of the present invention.
Principle of operation
The medium speed coal mill is one of important equipment of a thermal power plant, a primary air chamber 1 of the medium speed coal mill is a key component of the medium speed coal mill, and the uniformity of primary air speed and air volume in a mill in the medium speed coal mill directly influences the internal flow field of the coal mill, the carrying capacity of pulverized coal and the service life of a milling device and the wall of a coal mill cylinder of the medium speed coal mill;
the guide unit 4 is a component of the primary air chamber 1 of the medium-speed coal mill, the guide unit 4 of the primary air chamber 1 operates at a higher temperature and bears a larger primary air speed and the scouring abrasion of pebble coal discharged by the coal mill, so that the guide device of the primary air chamber is required to have good high-temperature wear resistance;
the guide unit 4 in the primary air chamber 1 can be adjusted by swinging the adjusting handle 3 according to the air volume, the air speed, the flow direction and the like of each position of the primary air chamber of the medium-speed coal mill, and the air volume, the air speed and the flow direction in the primary air chamber of the medium-speed coal mill can be fully uniform and reasonable after adjustment, so that an air ring enters a middle frame body area of the medium-speed coal mill.
Claims (8)
1. The utility model provides a medium speed pulverizer is wind chamber guider once which characterized in that: comprises a sealing box (2), an adjusting handle (3) and a guide unit (4);
be equipped with guide unit (4) in primary air chamber (1) of medium speed pulverizer, the one end and the guide unit (4) of adjustment handle (3) are connected, seal box (2) are the open-ended cuboid form of one end, the side of seal box (2) is equipped with rectangular through-hole, be equipped with seal box (2) on the shell of medium speed pulverizer, and seal box (2) pass the shell of medium speed pulverizer and stretch into primary air chamber (1), the other end of adjustment handle (3) once passes the shell of medium speed pulverizer and the rectangular through-hole on seal box (2).
2. The primary air chamber guide device of the medium speed coal mill according to claim 1, characterized in that: the guide unit (4) is arranged between the primary air chamber (1) of the medium-speed coal mill and the scraper device (5) of the medium-speed coal mill.
3. The primary air chamber guide device of the medium speed coal mill according to claim 1, characterized in that: the guide unit (4) comprises a baffle (4-1) and a rotating shaft (4-2), and the rotating shaft (4-2) is provided with the baffle (4-1) along the direction of the outer wall of the circumference.
4. The primary air chamber guide device of the medium speed coal mill according to claim 3, characterized in that: the rotating shaft (4-2) is vertically arranged inside the sealing box (2), and one end of the adjusting handle (3) is fixedly connected with the middle part of the outer wall of the rotating shaft (4-2).
5. The primary air chamber guide device of the medium speed coal mill according to claim 3, characterized in that: the baffle (4-1) is an arc baffle, and the radian of the baffle (4-1) is 10 degrees.
6. The primary air chamber guide device of the medium speed coal mill according to claim 3, characterized in that: the baffle (4-1) is a multi-surface folding baffle, and the included angle between the folding surfaces is 120-150 degrees.
7. The primary air chamber guide device of the medium speed coal mill according to claim 3, characterized in that: the baffle (4-1) is a parabolic baffle.
8. The primary air chamber guide device of the medium speed coal mill according to claim 3, characterized in that: the baffle (4-1) is a fish scale type baffle.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922385113.9U CN211359168U (en) | 2019-12-26 | 2019-12-26 | Primary air chamber guiding device of medium-speed coal mill |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922385113.9U CN211359168U (en) | 2019-12-26 | 2019-12-26 | Primary air chamber guiding device of medium-speed coal mill |
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| CN211359168U true CN211359168U (en) | 2020-08-28 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110935551A (en) * | 2019-12-26 | 2020-03-31 | 哈尔滨博深科技发展有限公司 | Primary air chamber guiding device of medium-speed coal mill |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110935551A (en) * | 2019-12-26 | 2020-03-31 | 哈尔滨博深科技发展有限公司 | Primary air chamber guiding device of medium-speed coal mill |
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