CN104555457A - Method for judging blockage of pneumatic ash conveying system - Google Patents
Method for judging blockage of pneumatic ash conveying system Download PDFInfo
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- CN104555457A CN104555457A CN201410788621.0A CN201410788621A CN104555457A CN 104555457 A CN104555457 A CN 104555457A CN 201410788621 A CN201410788621 A CN 201410788621A CN 104555457 A CN104555457 A CN 104555457A
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- ash
- transmitting system
- pneumatic
- temperature sensor
- pneumatic ash
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Abstract
The invention discloses a method for judging blockage of a pneumatic ash conveying system. According to the method, a temperature sensor is arranged nearby a discharging opening of an ash hopper; electric dust removal equipment continuously falls ash into the ash hopper, and the ash has a temperature higher than room temperature; the pneumatic ash conveying system continuously repeats a work cycle (the work cycle consists of a first time period and a second time period which are continuous) as follows: in the first time period, a discharging valve is kept open, a storehouse pump does not operate; in the second time period, the discharging valve is kept closed, the storehouse pump operates to convey the ash; during the work of the pneumatic ash conveying system, the condition that the pneumatic ash conveying system is subjected to blockage is judged if a temperature value detected by the temperature sensor basically remains unchanged in a period of time. According to the method, required devices are simple, implementation can be achieved by the temperature sensor only, and the ash conveying system is not required to undergo transformation, so that the applicable range is wide; the method disclosed by the invention can be used for discovering the blocked situation of the ash conveying system in an earlier time, so that the phenomenon that the ash hopper is blocked for a long time is prevented.
Description
Technical field
The present invention relates to a kind of method whether ash-transmission system is unobstructed that judges, particularly a kind of for judging the method that pneumatic ash transmitting system blocks.
Background technology
By ash bucket level signals, grey situation under also not having technological means to judge pneumatic ash transmitting system both at home and abroad at present, can only judge that whether defeated ash is unobstructed, when ash bucket high charge level signal is sent out, illustrate that the defeated ash of ash-transmission system is not smooth.When but ash bucket high charge level signal is sent out, often ash bucket the stifled ash time long, if process is not in time, electric field can be caused to exit, and generator set is forced to load down process.
The accuracy of the high charge level signal measurement of ash bucket and storehouse pump, a difficult problem for Ye Shige power plant.No matter the metering system of high charge level is radio frequency admittance, passive nucleon or differential pressure type, and all there is mistaking signal or refuse the situation of give a signal, operations staff often accurately cannot judge the ash quantity situation of ash bucket.
Summary of the invention
The present invention is directed to and judge whether ash-transmission system the defect existed in the method for the situation of stifled ash occurs, and devises a kind of for judging the method that pneumatic ash transmitting system blocks at present.
Technical scheme provided by the invention is:
A kind of for judging the method that pneumatic ash transmitting system blocks, wherein, described pneumatic ash transmitting system comprises ash bucket, storehouse pump, ash conveying pipe and ash silo, one electric dust-removing equipment is positioned at the upstream of described ash bucket, the feed opening of described ash bucket is connected to described storehouse pump, and a baiting valve is arranged between described feed opening and described storehouse pump, for determining the break-make between described feed opening and described storehouse pump, described storehouse pump is communicated to described ash silo by ash conveying pipe, for carrying out fluidization treatment to ash and transferring out;
On described ash bucket, near described feed opening, a temperature sensor is set;
Described electric dust-removing equipment is continuously to ash discharge in described ash bucket, and ash has the temperature higher than room temperature;
Described pneumatic ash transmitting system repeats following cycle of operations continuously: described cycle of operations was made up of continuous print first time period and the second time period, in first time period, described baiting valve is held open, described storehouse pump does not operate, in the second time period, described baiting valve keeps closing, and described storehouse pump operates;
In the working process of described pneumatic ash transmitting system, if the temperature value that described temperature sensor detects substantially remains unchanged within a period of time, then judge that described pneumatic ash transmitting system there occurs blocking.
Preferably, described for judging in the method that pneumatic ash transmitting system blocks, if the temperature value detected by described temperature sensor is in time in periodically changing, and it is first in rising trend in each period of change, on a declining curve again, then judge that described air-transport system blocks.
Preferably, described for judging in the method that pneumatic ash transmitting system blocks, in each cycle of operations, described second time period is 10 ~ 15min, and described first time period is 30s.
Preferably, described for judging in the method that pneumatic ash transmitting system blocks, if the variable quantity of temperature value within a period of time that described temperature sensor detects be no more than ± 3 DEG C, then judge that described air-transport system blocks.
Preferably, described for judging in the method that pneumatic ash transmitting system blocks, in the working process of described pneumatic ash transmitting system, if the temperature value that described temperature sensor detects substantially remains unchanged in 15 ~ 50min, then judge that described pneumatic ash transmitting system there occurs blocking.
Preferably, described in the method that pneumatic ash transmitting system blocks, a display equipment is presented in the working process of described pneumatic ash transmitting system for judging, the temperature value that described temperature sensor detects curve over time.
Preferably, described for judging that, in the method that pneumatic ash transmitting system blocks, arrange a heat-collecting block on described ash bucket, near described feed opening, described temperature sensor is arranged on described heat-collecting block.
The present invention utilizes the temperature of the ash carried in pneumatic ash transmitting system higher than room temperature and the startup of baiting valve regularity and the characteristic of closedown, designs a kind of for judging the method that pneumatic ash transmitting system blocks.When the defeated ash of pneumatic ash transmitting system is smooth and easy, the temperature traverse detected presents the change of periodic law along with the switch of baiting valve within a period of time, and when blocking appears in the defeated ash of pneumatic ash transmitting system, the temperature traverse detected in a period of time is along with expecting that the switch of valve is constant.The instrument wanted required for the present invention is simple, only needs temperature sensor just can realize, does not need to make transformation to ash-transmission system itself, widely applicable; Method provided by the invention can the situation of blocking of discovery ash-transmission system comparatively early, prevents the phenomenon that blocking for a long time appears in ash bucket.
Accompanying drawing explanation
Fig. 1 is diagram of circuit of the present invention.
Fig. 2 is temperature curve over time when pneumatic ash transmitting system does not occur to block in the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is described in further detail, can implement according to this with reference to specification sheets word to make those skilled in the art.
Pneumatic ash transmitting system comprises: ash bucket, storehouse pump, ash conveying pipe, ash silo and control convenience.Control convenience is provided with a read-out.The feed opening of ash bucket is communicated with storehouse pump by ash conveying pipe, ash conveying pipe is provided with baiting valve, and baiting valve is arranged between the feed opening of ash bucket and storehouse pump, baiting valve is for determining the break-make between the feed opening of ash bucket and storehouse pump, baiting valve and storehouse pump are electrically connected with control convenience, and control convenience controls the opening and closing of baiting valve and storehouse pump.Electric dust-removing equipment is arranged on the upstream of ash bucket, and continue to the ash of ash bucket delivery temperature higher than room temperature, pneumatic ash transmitting system repeats following cycle of operations continuously: cycle of operations was made up of continuous print first time period and the second time period, first time period (about 30s) control system opens baiting valve, now storehouse pump is in closed condition, the second time period (10 ~ 15 minutes), and control system closes baiting valve, storehouse pump is opened in enlightenment, and ash is wherein transported in ash silo by storehouse pump.
Be provided with the heat-collecting block of a metal at the feed opening place of ash bucket, heat-collecting block is provided with temperature sensor, and temperature sensor is electrically connected with controller, and temperature sensor detects the temperature at ash hole place in real time, and this temperature value is transferred to control system.The temperature sensor selected in the present embodiment is armoured Pt thermal resistance PT100, and specification is WZPK[-200-+500 (DEG C)].In the working process of pneumatic ash transmitting system, the temperature value that temperature sensor detects over time curve is presented at telltale.
As shown in Figure 1, the invention provides a kind of for judging the method that pneumatic ash transmitting system blocks:
If the temperature value detected by temperature sensor is in time in periodically changing, and it is first in rising trend in each period of change, on a declining curve again, then judge that described air-transport system blocks, what show in Fig. 2 is the temperature curve over time that the defeated ash of pneumatic ash transmitting system does not occur when blocking;
If the temperature value that temperature sensor detects substantially remained unchanged in 15 ~ 50 minutes, or the variable quantity of temperature value that temperature sensor detects be no more than ± 3 DEG C, then judge that pneumatic ash transmitting system there occurs blocking.
Although embodiment of the present invention are open as above, but it is not restricted to listed in specification sheets and embodiment utilization, it can be applied to various applicable the field of the invention completely, for those skilled in the art, can easily realize other amendment, therefore do not deviating under the universal that claim and equivalency range limit, the present invention is not limited to specific details and illustrates here and the legend described.
Claims (7)
1. one kind for judging the method that pneumatic ash transmitting system blocks, wherein, described pneumatic ash transmitting system comprises ash bucket, storehouse pump, ash conveying pipe and ash silo, one electric dust-removing equipment is positioned at the upstream of described ash bucket, the feed opening of described ash bucket is connected to described storehouse pump, and a baiting valve is arranged between described feed opening and described storehouse pump, for determining the break-make between described feed opening and described storehouse pump, described storehouse pump is communicated to described ash silo by ash conveying pipe, for carrying out fluidization treatment to ash and transferring out;
It is characterized in that,
On described ash bucket, near described feed opening, a temperature sensor is set;
Described electric dust-removing equipment is continuously to ash discharge in described ash bucket, and ash has the temperature higher than room temperature;
Described pneumatic ash transmitting system repeats following cycle of operations continuously: described cycle of operations was made up of continuous print first time period and the second time period, in first time period, described baiting valve is held open, described storehouse pump does not operate, in the second time period, described baiting valve keeps closing, and described storehouse pump operates;
In the working process of described pneumatic ash transmitting system, if the temperature value that described temperature sensor detects substantially remains unchanged within a period of time, then judge that described pneumatic ash transmitting system there occurs blocking.
2. as claimed in claim 1 for judging the method that pneumatic ash transmitting system blocks, it is characterized in that, if the temperature value detected by described temperature sensor is in time in periodically changing, and it is first in rising trend in each period of change, on a declining curve again, then judge that described air-transport system blocks.
3. as claimed in claim 1 or 2 for judging the method that pneumatic ash transmitting system blocks, it is characterized in that, in each cycle of operations, described second time period is 10 ~ 15min, and described first time period is 30s.
4. as claimed in claim 1 for judging the method that pneumatic ash transmitting system blocks, it is characterized in that, if the variable quantity of temperature value within a period of time that described temperature sensor detects be no more than ± 3 DEG C, then judge that described air-transport system blocks.
5. as claimed in claim 1 for judging the method that pneumatic ash transmitting system blocks, it is characterized in that, in the working process of described pneumatic ash transmitting system, if the temperature value that described temperature sensor detects substantially remains unchanged in 15 ~ 50min, then judge that described pneumatic ash transmitting system there occurs blocking.
6. as claimed in claim 2 for judging the method that pneumatic ash transmitting system blocks, it is characterized in that, a display equipment is presented in the working process of described pneumatic ash transmitting system, the temperature value that described temperature sensor detects curve over time.
7. as claimed in claim 1 for judging the method that pneumatic ash transmitting system blocks, it is characterized in that, on described ash bucket, near described feed opening, arrange a heat-collecting block, described temperature sensor is arranged on described heat-collecting block.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410788621.0A CN104555457B (en) | 2014-12-18 | 2014-12-18 | Method for judging blockage of pneumatic ash conveying system |
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| CN201410788621.0A CN104555457B (en) | 2014-12-18 | 2014-12-18 | Method for judging blockage of pneumatic ash conveying system |
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| CN104555457A true CN104555457A (en) | 2015-04-29 |
| CN104555457B CN104555457B (en) | 2017-01-11 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116809236A (en) * | 2023-05-23 | 2023-09-29 | 国能南京电力试验研究有限公司 | Safe operation judging method, device and system of electric dust collector and boiler system |
| CN117816376A (en) * | 2023-12-29 | 2024-04-05 | 江苏龙尚重工有限公司 | High-efficient dust collector of flue gas for metallurgy |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59225218A (en) * | 1983-06-06 | 1984-12-18 | Kawasaki Heavy Ind Ltd | Detecting device for choking of particle feed pipe |
| JP2003276842A (en) * | 2002-03-26 | 2003-10-02 | Mitsubishi Rayon Co Ltd | Transfer method of polymer powder |
| CN102134006A (en) * | 2011-05-03 | 2011-07-27 | 福建龙净环保股份有限公司 | Conveying control method for pneumatic conveying system |
| CN202765845U (en) * | 2012-09-27 | 2013-03-06 | 长沙有色冶金设计研究院有限公司 | Pneumatic dust conveying device |
| CN203064820U (en) * | 2012-12-24 | 2013-07-17 | 上海梅山钢铁股份有限公司 | Pneumatic ash conveying control device |
-
2014
- 2014-12-18 CN CN201410788621.0A patent/CN104555457B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59225218A (en) * | 1983-06-06 | 1984-12-18 | Kawasaki Heavy Ind Ltd | Detecting device for choking of particle feed pipe |
| JP2003276842A (en) * | 2002-03-26 | 2003-10-02 | Mitsubishi Rayon Co Ltd | Transfer method of polymer powder |
| CN102134006A (en) * | 2011-05-03 | 2011-07-27 | 福建龙净环保股份有限公司 | Conveying control method for pneumatic conveying system |
| CN202765845U (en) * | 2012-09-27 | 2013-03-06 | 长沙有色冶金设计研究院有限公司 | Pneumatic dust conveying device |
| CN203064820U (en) * | 2012-12-24 | 2013-07-17 | 上海梅山钢铁股份有限公司 | Pneumatic ash conveying control device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116809236A (en) * | 2023-05-23 | 2023-09-29 | 国能南京电力试验研究有限公司 | Safe operation judging method, device and system of electric dust collector and boiler system |
| CN116809236B (en) * | 2023-05-23 | 2024-07-02 | 国能南京电力试验研究有限公司 | Safe operation judging method, device and system of electric dust collector and boiler system |
| CN117816376A (en) * | 2023-12-29 | 2024-04-05 | 江苏龙尚重工有限公司 | High-efficient dust collector of flue gas for metallurgy |
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| CN104555457B (en) | 2017-01-11 |
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