CN210522016U - Ash removal device for air inlet box of centrifugal fan - Google Patents
Ash removal device for air inlet box of centrifugal fan Download PDFInfo
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- CN210522016U CN210522016U CN201921080057.1U CN201921080057U CN210522016U CN 210522016 U CN210522016 U CN 210522016U CN 201921080057 U CN201921080057 U CN 201921080057U CN 210522016 U CN210522016 U CN 210522016U
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Abstract
The utility model provides an ash removal device of centrifugal fan inlet box, include: the device comprises a blowing pipe, a first manual valve, a first pipe joint, a second manual valve, an electromagnetic valve, a third manual valve, a fourth manual valve, a second pipe joint and a compressed gas source pipe; one end of the injection pipe is used as a nozzle and connected with an air inlet box of the centrifugal fan, and the other end of the injection pipe is connected with one end of the first manual valve; the other end of the first manual valve, one end of the second manual valve and one end of the third manual valve are connected through a first pipe joint; the other end of the second manual valve is connected with one end of the electromagnetic valve, and the other end of the electromagnetic valve is connected with one end of the fourth manual valve; the other end of the fourth manual valve, the other end of the third manual valve and a compressed gas source pipe are connected through a second pipe joint. The utility model discloses a dust cleaning device of centrifugal fan inlet box can effectively clear away the buggy of piling up in centrifugal fan inlet box bottom, eliminates the potential safety hazard.
Description
Technical Field
The utility model relates to a coal grinds technical field of the system, especially relates to an ash removal device of centrifugal fan inlet box.
Background
And in the operation of the coal mill system, the centrifugal fan drives the circulating air in the coal mill system to flow, and qualified coal powder ground in the coal mill is conveyed out of the coal mill. When the circulating air passes through the centrifugal fan, the pulverized coal with larger particles moves at the bottom of the air inlet box of the centrifugal fan under the action of centrifugal force. Because the downward centrifugal force is larger than the centripetal force, the large-particle coal dust is not completely flowed away along with the airflow of the circulating air, and is accumulated at the bottom of the air inlet box of the centrifugal fan. Especially in the process of stopping grinding, the centrifugal fan is insufficient to exert an effect of conveying large-particle coal powder, and the coal powder is accumulated at the bottom of the air inlet box of the centrifugal fan.
If the accumulated coal dust is not cleaned in time, spontaneous combustion is easy to occur, and the safety of the whole coal grinding system is affected. However, the bottom of the air inlet box of the centrifugal fan is not provided with an access hole, so that the space is narrow, and manual cleaning operation is very inconvenient; moreover, the pulverized coal is easy to generate oxidation reaction to generate carbon monoxide, which causes great harm to the personal safety.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a dust cleaning device of centrifugal fan inlet box can effectively clear away the buggy of piling up in centrifugal fan inlet box bottom, eliminates the potential safety hazard.
The utility model provides an ash removal device of centrifugal fan inlet box, include: the device comprises a blowing pipe, a first manual valve, a first pipe joint, a second manual valve, an electromagnetic valve, a third manual valve, a fourth manual valve, a second pipe joint and a compressed gas source pipe; one end of the injection pipe is used as a nozzle and connected with the air inlet box of the centrifugal fan, and the other end of the injection pipe is connected with one end of the first manual valve; the other end of the first manual valve, one end of the second manual valve and one end of the third manual valve are connected through the first pipe joint; the other end of the second manual valve is connected with one end of the electromagnetic valve, and the other end of the electromagnetic valve is connected with one end of the fourth manual valve; the other end of the fourth manual valve, the other end of the third manual valve and the compressed gas source pipe are connected through the second pipe joint.
Optionally, the solenoid valve is connected to a distributed control system through a cable, so that the opening and closing of the solenoid valve is controlled by the distributed control system.
Optionally, the first pipe joint and the second pipe joint are both three-way joints.
Optionally, the ash removal device further comprises: a first 90 ° elbow; the other end of the first manual valve is connected with the first pipe joint through the first 90-degree elbow.
Optionally, the ash removal device further comprises: a second 90 degree elbow and a third 90 degree elbow; one end of the third manual valve is connected with the first pipe joint through the second 90-degree elbow, and the other end of the third manual valve is connected with the second pipe joint through the third 90-degree elbow.
Optionally, the nozzle of the injection pipe is connected with and flush with the bottom of the centrifugal fan air inlet box.
Optionally, the number of the injection pipes is multiple, and the nozzles of each injection pipe are connected with the bottom of the air inlet box of the centrifugal fan in a uniformly distributed manner; the number of the first manual valves is the same as that of the injection pipes, and each first manual valve is connected with one injection pipe.
Optionally, the compressed gas source pipe is used for providing a high-pressure gas source, the high-pressure gas source is compressed air, nitrogen or inert gas, and the pressure of the high-pressure gas source is greater than 0.4 MPa.
The ash cleaning device of the centrifugal fan air inlet box of the utility model enables the high-pressure air source to flow into the injection pipe through the control solenoid valve, thereby blowing the coal dust accumulated at the bottom of the centrifugal fan air inlet box, effectively removing the coal dust accumulated at the bottom of the centrifugal fan air inlet box and eliminating the potential safety hazard; and the electromagnetic valve is overhauled under the condition that the dust cleaning device normally works through a bypass blowing pipeline, so that the dust cleaning is safely and stably carried out.
Drawings
The above and other objects, features and advantages of the present invention will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings, in which:
fig. 1 is a schematic view of an ash removal device for an air inlet box of a centrifugal fan according to an embodiment of the present invention.
Detailed Description
Various example embodiments will now be described more fully with reference to the accompanying drawings, in which some example embodiments are shown.
The dust cleaning device of the centrifugal fan inlet box according to the embodiment of the present invention is described with reference to fig. 1.
Referring to fig. 1, the ash removal device for the air inlet box of the centrifugal fan according to the embodiment of the present invention includes: the device comprises an injection pipe 1, a first manual valve 2, a first pipe joint 3, a second manual valve 4, an electromagnetic valve 5, a third manual valve 6, a fourth manual valve 7, a second pipe joint 8 and a compressed gas source pipe 9.
One end of the injection pipe 1 is used as a nozzle and connected with the air inlet box 14 of the centrifugal fan, and the other end of the injection pipe is connected with one end of the first manual valve 2; the other end of the first manual valve 2, one end of the second manual valve 4, and one end of the third manual valve 6 are connected to each other through the first pipe joint 3; the other end of the second manual valve 4 is connected with one end of the electromagnetic valve 5, and the other end of the electromagnetic valve 5 is connected with one end of the fourth manual valve 7; the other end of the fourth manual valve 7, the other end of the third manual valve 6 and the compressed gas source pipe 9 are connected through the second pipe joint 8.
The compressed gas source pipe 9 is used for providing a high-pressure gas source. By way of example, the high-pressure gas source is compressed air, nitrogen or inert gas, and the pressure of the high-pressure gas source is greater than 0.4 Mpa.
As an example, the nozzle of the injection pipe 1 is flush with the bottom of the inlet box 14 of the centrifugal fan. The structure can ensure that the gas sprayed from the nozzle of the injection pipe 1 exerts an upward force on the coal dust accumulated at the bottom of the air inlet box 14 of the centrifugal fan, thereby effectively removing the accumulated coal dust, avoiding the accumulation of the coal dust to cause naturalness, ensuring the safety and stability of operation and reducing the manpower consumption.
Preferably, the blowing pipe 1 is made of carbon steel or stainless steel, but the present invention is not limited thereto.
It will be appreciated that the number of injection pipes 1 is at least one.
As an example, when the number of the injection pipes 1 is one, the nozzles of the injection pipes 1 are connected to the center of the bottom of the centrifugal fan inlet box 14. In this case, the first pipe joint 3 and the second pipe joint 8 are both three-way joints.
As another example, when the number of the injection pipes 1 is plural, the nozzle of each injection pipe 1 is connected to the bottom of the centrifugal fan inlet box 14 in an evenly distributed manner. In this case, the number of first manual valves 2 is the same as the number of injection pipes 1, i.e. the first manual valves 2 correspond one-to-one to the injection pipes 1, i.e. each first manual valve 2 is connected to one injection pipe 1.
It will be appreciated that the connections described above are all pipe/tubing connections. As an example, the connection manner may be welding, but the present invention is not limited thereto.
When adopting the straight tube to connect, ash removal device still includes: a first 90 ° bend 11; the other end of the first manual valve 2 is connected to the first pipe connection 3 via the first 90 ° bend 11. That is, the other end of the first manual valve 2 is connected to one end of the first 90 ° elbow 11 through a straight pipe, and the other end of the first 90 ° elbow 11 is connected to the first pipe joint 3 through a straight pipe.
When adopting the straight tube to connect, ash removal device still includes: a second 90 ° bend 12 and a third 90 ° bend 13; one end of the third manual valve 6 is connected to the first pipe joint 3 through the second 90 ° elbow 12, and the other end of the third manual valve 6 is connected to the second pipe joint 8 through the third 90 ° elbow 13. That is, one end of the third manual valve 6 is connected to one end of the second 90 ° elbow 12 through a straight pipe, the other end of the second 90 ° elbow 12 is connected to the first pipe joint 3 through a straight pipe, the other end of the third manual valve 6 is connected to one end of the third 90 ° elbow 13 through a straight pipe, and the other end of the third 90 ° elbow 13 is connected to the second pipe joint 8 through a straight pipe.
Here, the solenoid valve 5 is connected to a Distributed Control System (DCS) 10 through a cable, so that the opening and closing of the solenoid valve 5 is controlled by the Distributed control system 10.
Specifically, the working process of the ash removal device is as follows: when the first manual valve 2, the second manual valve 4 and the fourth manual valve 7 are manually opened and the third manual valve 6 is manually closed, and the distributed control system 10 controls the electromagnetic valve 5 to be opened, the high-pressure air source provided by the compressed air source pipe 9 flows into the injection pipe 1 through the second pipe joint 8, the fourth manual valve 7, the electromagnetic valve 5, the second manual valve 4, the first pipe joint 3 and the first manual valve 2 in sequence, so that the bottom of the centrifugal fan inlet box 14 is injected through the nozzle of the injection pipe 1. Here, when the gas ejected from the nozzle of the injection pipe 1 enters the bottom of the air inlet box 14 of the centrifugal fan, an upward force is applied to the accumulated pulverized coal, the accumulated pulverized coal is blown into the inlet 15 of the centrifugal fan, and the pulverized coal flows to the outlet 16 of the centrifugal fan along with the air flow, so that the bottom of the air inlet box 14 of the centrifugal fan is effectively cleaned, and further potential safety hazards are eliminated.
When the electromagnetic valve 5 fails (for example, the electromagnetic valve 5 fails due to long-time operation of the coil), the second manual valve 4 and the fourth manual valve 7 are manually closed, and the third manual valve 6 is manually opened, so that the blowing and ash removal are performed by using the bypass blowing pipeline where the third manual valve 6 is located. That is, the high-pressure gas source supplied from the compressed gas source pipe 9 flows into the injection pipe 1 through the second pipe joint 8, the third manual valve 6, the first pipe joint 3, and the first manual valve 2 in this order, and the bottom of the centrifugal fan inlet box 14 is blown through the nozzle of the injection pipe 1.
It can be understood that the electromagnetic valve 5 can be overhauled under the condition of ensuring the normal work of the ash cleaning device by arranging the bypass blowing pipeline.
The distributed control system 10 can control the opening and closing of the electromagnetic valve 5 according to the dust deposition condition (namely, the condition of accumulating coal dust) at the bottom of the centrifugal fan air inlet box 14, and set the injection time and the injection interval time. For example, when the ash deposition thickness is more than 50mm after not adopting the blowing for 1 minute, the blowing time is set to be 30 seconds, and the blowing interval time is set to be 1 minute; when the ash deposition thickness is less than 50mm after the blowing is not adopted for 1 minute, the blowing time is set to be 15 seconds, and the blowing interval time is set to be 1 minute. If the high-pressure air source provided by the compressed air source pipe 9 is enough or the ash deposition thickness is more than 70mm after blowing for 1 minute, the ash removal is carried out in a normally open state.
In summary, the ash removal device of the centrifugal fan air inlet box of the embodiment of the utility model enables the high-pressure air source to flow into the injection pipe by controlling the electromagnetic valve, thereby blowing the coal dust accumulated at the bottom of the centrifugal fan air inlet box, effectively removing the coal dust accumulated at the bottom of the centrifugal fan air inlet box and eliminating the potential safety hazard; and the electromagnetic valve is overhauled under the condition that the dust cleaning device normally works through a bypass blowing pipeline, so that the dust cleaning is safely and stably carried out.
While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (8)
1. The utility model provides an ash removal device of centrifugal fan inlet box which characterized in that includes: the device comprises a blowing pipe (1), a first manual valve (2), a first pipe joint (3), a second manual valve (4), an electromagnetic valve (5), a third manual valve (6), a fourth manual valve (7), a second pipe joint (8) and a compressed gas source pipe (9);
one end of the blowing pipe (1) is used as a nozzle and connected with the centrifugal fan air inlet box (14), and the other end of the blowing pipe (1) is connected with one end of the first manual valve (2); the other end of the first manual valve (2), one end of the second manual valve (4) and one end of the third manual valve (6) are connected through the first pipe joint (3); the other end of the second manual valve (4) is connected with one end of the electromagnetic valve (5), and the other end of the electromagnetic valve (5) is connected with one end of the fourth manual valve (7); the other end of the fourth manual valve (7), the other end of the third manual valve (6) and the compressed gas source pipe (9) are connected through the second pipe joint (8).
2. The ash removal device according to claim 1, wherein the solenoid valve (5) is connected to a distributed control system (10) through a cable, so that the opening and closing of the solenoid valve (5) is controlled by the distributed control system (10).
3. The ash removal device according to claim 1, wherein the first pipe joint (3) and the second pipe joint (8) are both three-way joints.
4. The ash removal device of claim 3, further comprising: a first 90 ° bend (11);
wherein the other end of the first manual valve (2) is connected with the first pipe joint (3) through the first 90-degree elbow (11).
5. The ash removal device of claim 4, further comprising: a second 90-degree elbow (12) and a third 90-degree elbow (13);
wherein one end of the third manual valve (6) is connected with the first pipe joint (3) through the second 90-degree elbow (12), and the other end of the third manual valve (6) is connected with the second pipe joint (8) through the third 90-degree elbow (13).
6. The ash removal device as claimed in claim 1, characterized in that the nozzle of the injection pipe (1) is connected with the bottom of the centrifugal fan inlet box (14) and is flush with the bottom of the centrifugal fan inlet box (14).
7. The ash cleaning device according to claim 6, characterized in that the number of the injection pipes (1) is multiple, and the nozzles of each injection pipe (1) are connected with the bottom of the centrifugal fan inlet box (14) in an evenly distributed manner;
the number of the first manual valves (2) is the same as that of the injection pipes (1), and each first manual valve (2) is connected with one injection pipe (1).
8. The ash removal device according to claim 1, wherein the compressed gas source pipe (9) is used for providing a high-pressure gas source, the high-pressure gas source is compressed air, nitrogen or inert gas, and the pressure of the high-pressure gas source is more than 0.4 MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921080057.1U CN210522016U (en) | 2019-07-11 | 2019-07-11 | Ash removal device for air inlet box of centrifugal fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921080057.1U CN210522016U (en) | 2019-07-11 | 2019-07-11 | Ash removal device for air inlet box of centrifugal fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210522016U true CN210522016U (en) | 2020-05-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921080057.1U Active CN210522016U (en) | 2019-07-11 | 2019-07-11 | Ash removal device for air inlet box of centrifugal fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210522016U (en) |
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2019
- 2019-07-11 CN CN201921080057.1U patent/CN210522016U/en active Active
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