CN216095353U - Automatic purging system for coal mill powder pipe - Google Patents
Automatic purging system for coal mill powder pipe Download PDFInfo
- Publication number
- CN216095353U CN216095353U CN202122704068.6U CN202122704068U CN216095353U CN 216095353 U CN216095353 U CN 216095353U CN 202122704068 U CN202122704068 U CN 202122704068U CN 216095353 U CN216095353 U CN 216095353U
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- Prior art keywords
- pipeline
- cabinet
- control cabinet
- local control
- purging system
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- 238000010926 purge Methods 0.000 title claims abstract description 30
- 239000003245 coal Substances 0.000 title claims abstract description 18
- 239000000843 powder Substances 0.000 title claims abstract description 18
- 238000005070 sampling Methods 0.000 claims abstract description 12
- 238000011065 in-situ storage Methods 0.000 claims description 2
- 238000012423 maintenance Methods 0.000 abstract description 4
- 238000002485 combustion reaction Methods 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 3
- 239000000463 material Substances 0.000 abstract description 2
- 238000005034 decoration Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000009530 blood pressure measurement Methods 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 238000004939 coking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000003203 everyday effect Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
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- Regulation And Control Of Combustion (AREA)
Abstract
The utility model provides an automatic purging system of coal pulverizer powder pipe, includes DCS control station, pneumatic door switch board and the local control cabinet that loops through the cable junction, and the local control cabinet is connected with wind speed changer cabinet, is equipped with the pipeline in the wind speed changer cabinet, and the pipeline is connected with sampling device's high-low pressure survey pipeline, is equipped with the solenoid valve of being connected with the local control cabinet on the pipeline. The utility model thoroughly solves the problems of manpower and material resources consumed by manual purging, and greatly reduces the maintenance cost; the purging effect is better than that of manual purging through the purging interval time, sequential circulation and automatic queuing of purging instructions of the DCS control station; the operating personnel can monitor the air speed of the powder pipe accurately in real time and can also be used for evidencing and judging the combustion condition of the boiler.
Description
Technical Field
The utility model relates to a powder pipe measuring technology, in particular to an automatic purging system for a powder pipe of a coal mill.
Background
The safety and economy of boiler combustion are closely related to the regulation of primary air and secondary air. For primary air, the primary air is necessary to be monitored, because the primary air is easily blocked due to too low wind speed, the ignition distance of an impact port is too short, and even the primary air is combusted in a primary air pipeline, the primary air is easily cut off, extinguished and blasted, the air supply pipeline is seriously abraded, and the deviation of a combustion center, local coking, boiler explosion and leakage and the like are easily caused due to uneven wind speed.
The existing powder pipe measuring technology is generally differential pressure type sampling, namely, the characteristic that differential pressure is increased along with the increase of flow velocity is utilized to calculate the air speed of a powder pipe; from the essence, still rely on the sampling tube to measure, though the sampling of application ceramic material prevents stifled device now, a large amount of operation experiences draw the conclusion, when opening and stopping coal pulverizer or coal type and change, will save a large amount of buggy in the sampling tube and lead to the sampling tube to block up, and then need carry out the manual work of a lot of every day and sweep, not only increaseed maintainer's the maintenance degree of difficulty, and influenced operation personnel's supervision dish and judged, if can cause consequences such as boiler extinguishment under the extreme condition, the very big safe and stable operation that has influenced the boiler.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem of overcoming the defects in the prior art and provides an automatic purging system for a coal mill powder pipe, which has the advantages of low maintenance cost, good purging effect and convenience in adjusting the wind speed.
The technical scheme adopted by the utility model for solving the technical problems is as follows: the utility model provides an automatic purging system of coal pulverizer powder pipe, includes DCS control station, pneumatic door switch board and the local control cabinet that loops through the cable junction, the local control cabinet is connected with wind speed changer cabinet, be equipped with the pipeline in the wind speed changer cabinet, the pipeline is connected with sampling device's high-low pressure survey pipeline, be equipped with the solenoid valve of being connected with the local control cabinet on the pipeline.
Furthermore, a one-way valve and a needle valve are also arranged on the pipeline. The flow direction of the compressed air in the pipeline is sequentially an electromagnetic valve, a one-way valve and a needle valve; the needle valve can be manually cut off to automatically purge the pipeline to be switched on and off, the needle valve is generally in a normally open position during operation, and when the pipeline needs to be overhauled, the needle valve is closed to carry out isolated overhaul; the check valve is used for enabling the blown compressed air to flow towards a preset direction; the electromagnetic valve can automatically control the on-off of the purging pipeline, and is different from a needle valve in that the electromagnetic valve can be remotely controlled by DCS, and the needle valve can only be operated on site.
Furthermore, an electromagnetic valve, a one-way valve and a needle valve are sequentially arranged on the pipeline from near to far from the sampling device, and the electromagnetic valve, the one-way valve and the needle valve are respectively arranged as one.
Furthermore, two pipelines are arranged in the wind speed transmitter cabinet. The wind speed transmitter cabinet adopts a differential pressure type measuring mode, two pipelines have high pressure and low pressure one by one, and after entering the wind speed transmitter cabinet, the wind speed transmitter cabinet calculates the differential pressure of the two pipelines to finally obtain a wind speed measured value.
Furthermore, the pneumatic door power distribution cabinet is connected with the local control cabinet through a DO clamping piece, and the DO clamping piece can remotely control the on-off of the electromagnetic valve.
Furthermore, the local control cabinet comprises a front wall local control cabinet and a rear wall local control cabinet which are respectively arranged on the front wall and the rear wall of the boiler, the wind speeds of the single coal mill are four, and the wind speed transmitter cabinets are respectively two on the front wall and the rear wall.
The utility model has the advantages that the problems of manpower and material resources consumed by manual purging are thoroughly solved, and the maintenance cost is greatly reduced; the purging effect is better than that of manual purging through the purging interval time, sequential circulation and automatic queuing of purging instructions of the DCS control station; the operating personnel can monitor the powder pipe in real time and accurately to adjust the air speed and can also be used for evidencing and judging the combustion condition of the boiler.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a diagram of the DCS logic configuration of the present invention.
In the drawings: 1. DCS control station, 11, cables, 2, a pneumatic door power distribution cabinet, 21, a DO clamping piece, 31, a front wall local control cabinet, 32, a rear wall local control cabinet, 4, a wind speed transmitter cabinet, 41, a pipeline, 42, an electromagnetic valve, 43, a one-way valve, 44 and a needle valve.
Detailed Description
The following examples are given to further illustrate the embodiments of the present invention:
as shown in fig. 1 and 2, an embodiment of an automatic purging system for a coal pulverizer powder pipe includes a DCS control station 1, a pneumatic door power distribution cabinet 2, and an on-site control cabinet sequentially connected by a cable 11, the on-site control cabinet is connected to a wind speed transmitter cabinet 4, a pipeline 41 is provided in the wind speed transmitter cabinet 4, the pipeline 41 is connected to a high-low pressure measurement pipeline of a sampling device, and an electromagnetic valve 42 connected to the on-site control cabinet is provided on the pipeline 41.
On the pipe 41, from the near to the far from the sampling device, there are a solenoid valve 42, a check valve 43 and a needle valve 44. The flow direction of the compressed air in the pipeline 41 is sequentially an electromagnetic valve 42, a one-way valve 43 and a needle valve 44; the needle valve 44 can be manually cut off to automatically purge the pipeline to be switched on and off, the needle valve is normally in a normally open position during operation, and when the pipeline 41 needs to be overhauled, the needle valve 44 is closed to carry out isolated overhaul; the check valve 43 is for allowing the purge compressed air to flow in a predetermined direction; the solenoid valve 42 automatically controls the purge line 41, in contrast to the needle valve 44, in that the solenoid valve 42 may be remotely controlled by the DCS, and the needle valve 44 may only be operated in situ.
Two pipelines 41 are arranged in the wind speed transmitter cabinet 4. The wind speed transmitter cabinet 4 adopts a differential pressure type measuring mode, two pipelines 41 have high pressure and low pressure, and after entering the wind speed transmitter cabinet 4, the wind speed transmitter cabinet 4 calculates the differential pressure between the two pipelines to finally obtain a wind speed measured value.
The pneumatic door power distribution cabinet 2 is connected with the local control cabinet through a DO clamping piece 21, and the DO clamping piece 21 can remotely control the on-off of the electromagnetic valve.
The local control cabinet comprises a front wall local control cabinet 31 and a rear wall local control cabinet 32 which are respectively arranged on the front wall and the rear wall of the boiler, the wind speed of a single coal mill is four, the number of the wind speed transmitter cabinets is 4, and the wind speed transmitter cabinets are respectively two on the front wall and the rear wall.
Those not described in detail in the specification are well within the skill of the art.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and decorations can be made without departing from the technical principle of the present invention, and these modifications and decorations should also be regarded as being within the protection scope of the present invention.
Claims (7)
1. The utility model provides an automatic purging system of coal pulverizer powder pipe, its characterized in that includes DCS control station, pneumatic door switch board and the local control cabinet that loops through the cable junction, the local control cabinet is connected with wind speed changer cabinet, be equipped with the pipeline in the wind speed changer cabinet, the pipeline is connected with sampling device's high-low pressure survey pipeline, be equipped with the solenoid valve of being connected with the local control cabinet on the pipeline.
2. The automatic purging system for the coal pulverizer powder pipe as recited in claim 1, wherein the pipeline is further provided with a one-way valve and a needle valve.
3. The automatic purging system for the coal pulverizer powder pipe as claimed in claim 2, wherein the pipeline is provided with a solenoid valve, a one-way valve and a needle valve in sequence from near to far from the sampling device.
4. The automatic purging system for the coal pulverizer powder pipe as recited in claim 3, wherein the solenoid valve, the check valve and the needle valve are respectively provided as one.
5. The automatic purging system for the coal pulverizer powder pipe as recited in claim 4, wherein two pipes are provided in the wind speed transmitter cabinet.
6. The automatic purging system for the coal pulverizer fines tube of claim 5, wherein the pneumatic door power distribution cabinet is coupled to the in situ control cabinet via a DO clip.
7. The automatic purging system for the coal pulverizer powder duct of claim 6, wherein the local control cabinet comprises a front wall local control cabinet and a rear wall local control cabinet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122704068.6U CN216095353U (en) | 2021-11-05 | 2021-11-05 | Automatic purging system for coal mill powder pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122704068.6U CN216095353U (en) | 2021-11-05 | 2021-11-05 | Automatic purging system for coal mill powder pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216095353U true CN216095353U (en) | 2022-03-22 |
Family
ID=80714440
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122704068.6U Expired - Fee Related CN216095353U (en) | 2021-11-05 | 2021-11-05 | Automatic purging system for coal mill powder pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216095353U (en) |
-
2021
- 2021-11-05 CN CN202122704068.6U patent/CN216095353U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20220322 |
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| CF01 | Termination of patent right due to non-payment of annual fee |