CN101434345A - Load adaptive control method of pneumatic conveying system - Google Patents
Load adaptive control method of pneumatic conveying system Download PDFInfo
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- CN101434345A CN101434345A CNA2008102434870A CN200810243487A CN101434345A CN 101434345 A CN101434345 A CN 101434345A CN A2008102434870 A CNA2008102434870 A CN A2008102434870A CN 200810243487 A CN200810243487 A CN 200810243487A CN 101434345 A CN101434345 A CN 101434345A
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Abstract
The invention relates to a load self adaptive control method of a pneumatic conveying system, which is an advanced load self adaptive control model of a pneumatic ash handling system in a thermal power plant, belonging to the field of pneumatic conveying technology. The method is characterized in that the pressure change values of an air path, a sending tank and a pipeline in the conveying system are extracted and sent to an intelligent control center; under the support of corresponding procedures, feeding time, conveying time and interval time of the conveying system are distributed dynamically; the former conveying monitored by a level-sensing device is replaced by the conveying monitored by working pressure for conveying air, thus being capable of automatically tracking the ash quantity of different loads of units, improving the efficiency of the system, greatly simplifying the structure of an ash conveying system, and therefore the system can save a majority of pump level-sensing devices, heat tracing devices, heat preservation devices and the like, and reduce the needed equipment investment and energy consumption; in addition, the system is led to save energy, lower cost and consumption, have more reliable performances and be easy for maintenance, and therefore the system has extremely strong practicability and can be widely used for the pneumatic ash handling system in the power plant.
Description
Technical field
The present invention relates to a kind of load adaptive control method of pneumatic conveying system, is a kind of advanced person's of thermal power plant's pneumatic ash removal system load self-adapting master mode, belongs to the Pneumatic Conveying Technology field.
Background technology
The pneumatic ash removal system of power plant's application has negative-pressure pneumatic transmission system, pressure-fired pneumatic ash removal system, malleation air-transport system etc., the form that the mode of these system's ash disposal mostly adopts set time or material level completely to send at home at present.The conveying of set time pattern is changeless, no matter the size of ash amount, its traffic capacity is one deck unmodified, and the just appearance of exerting oneself of system was obviously not enough when especially grey quantitative change was big.The material level pattern is to send that jar material is full to be sent, grey quantitative change hour or in winter, hi-heat ash sent jar the overstand meeting dry and hard, can not normally carry, influence system performance.Therefore existing master mode does not have the load self-adapting controllable function entirely.
Summary of the invention
The purpose of this invention is to provide a kind of load adaptive control method of pneumatic conveying system, at the existing set time send the grey quantitative change that exists when big system exert oneself just occur obviously not enough; Overstand can be dry and hard in sending jar for the ash that material level completely sends existence, can not normally carry, and influence the deficiency of system performance, realizes actual conditions according to load, the pitch time of adjustment transmission voluntarily by the present invention.
The objective of the invention is to be achieved through the following technical solutions, a kind of load adaptive control method of pneumatic conveying system, it is characterized in that, described method is that gas circuit in the extraction delivery system, transmission jar are sent into intelligent control center with the change value of pressure of pipeline, the feed time of dynamic assignment delivery system, time of delivery and off time under the support of corresponding program.
The present invention adopts the operation pressure monitoring of carrying air to carry by original level-sensing device monitoring being carried change into, but thereby the ash amount of the different load of automatic tracking unit, improved the work efficiency of system, simplified the structure of ash-transmission system greatly, therefore system can save most storehouse pump level-sensing devices, accompany equipment such as hot device, insulation, equipment needed thereby investment of minimizing system and energy resource consumption, and make energy saving of system, fall this, the consumption reduction, performance is more reliable, easy care, have very strong practicality, can be widely used in power plant's pneumatic ash removal system.
Description of drawings
Fig. 1 is the coordinate diagram under the ash amount minimizing trend in the pipeline;
Fig. 2 is the coordinate diagram under the ash amount increase tendency in the pipeline;
Among the figure, the P force value is an ordinate, and the t time is abscissa, and A is the feeding time,
T is a pitch time.
The specific embodiment
Further specify the present invention in conjunction with the embodiments, the present invention is provided with pressure transformer at gas circuit, transmission jar with pipeline, the signal of pressure transformer connects intelligent control center through lead, gas circuit, transmission jar are sent into intelligent control center with the change value of pressure of pipeline, the feed time of dynamic assignment delivery system, time of delivery and off time under the support of corresponding program in the extraction delivery system.
Operational process is divided into three parts, feed time, time of delivery and off time.The embodiment of load self-adapting function:
At first each group of system is sent and jar make test when debugging, with certain group transmission group for example: allow the ash that capacity is housed in the ash bucket, when inlet valve was opened, filling the time that sends jar was feed time, is assumed to be 1 minute.During conveying according to gas circuit, send jar, test out with the pressure transformer of pipeline and send the ash time, be assumed to be 5 minutes.Design the off time of initial setting according to system's ash amount.
As shown in Figure 1, when system's ash amount reduces,, and send the ash time to become 4 minutes because of feed time still is 1 minute.Illustrating does not have enough ashes in the ash bucket, for the waste of the anti-locking system energy should prolong off time, Cai there are enough ash amount chargings in system.Send when carrying the ash time to become 4.5 minutes next time, and then carry out off time and revise.Be to analyze, calculate by the genetic algorithm of fuzzy system this off time, dynamically revises again, adjusts to best off time.
As shown in Figure 2, when system's ash amount increases,, it is 5 minutes and send ash time continuous several times because of feed time still is 1 minute.Illustrating has enough ashes not discharge in the ash bucket, for anti-locking system undercapacity, should shorten off time, increases and carries number of times.Send the ash time when carrying still is 5 minutes next time, and then carries out off time and revise.Be to analyze, calculate by the genetic algorithm of fuzzy system same this off time, dynamically revises again, adjusts to best off time.The limit of the maximum output of system is to be off time zero.If off time repeatedly appears in system is zero, illustrative system can't adapt to present requirements of exerting oneself (this phenomenon does not generally exist, and will consider exerting oneself under the peak load of system when designing).
Claims (2)
1, a kind of load adaptive control method of pneumatic conveying system, it is characterized in that, described method is that gas circuit in the extraction delivery system, transmission jar are sent into intelligent control center with the change value of pressure of pipeline, the feed time of dynamic assignment delivery system, time of delivery and off time under the support of corresponding program.
2, load adaptive control method of pneumatic conveying system according to claim 1 is characterized in that, described gas circuit, transmission jar are provided with pressure transformer with pipeline, and the signal of pressure transformer connects intelligent control center through lead.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008102434870A CN101434345A (en) | 2008-12-26 | 2008-12-26 | Load adaptive control method of pneumatic conveying system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008102434870A CN101434345A (en) | 2008-12-26 | 2008-12-26 | Load adaptive control method of pneumatic conveying system |
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| CN101434345A true CN101434345A (en) | 2009-05-20 |
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| CNA2008102434870A Pending CN101434345A (en) | 2008-12-26 | 2008-12-26 | Load adaptive control method of pneumatic conveying system |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102874599A (en) * | 2012-09-25 | 2013-01-16 | 上海发电设备成套设计研究院 | Method for judging idle running of positive-pressure dense-phase bin pump |
| CN103043446A (en) * | 2012-12-27 | 2013-04-17 | 中冶长天国际工程有限责任公司 | Method and system for determining gas transmission interval of pneumatic transmission system |
| CN103112722A (en) * | 2013-03-14 | 2013-05-22 | 福建龙净环保股份有限公司 | Energy-saving-type pneumatic ash removal conveying control method and equipment thereof |
| CN103950730A (en) * | 2014-03-19 | 2014-07-30 | 内蒙古电力勘测设计院 | Energy saving control method of thermal power plant pneumatic ash conveying system |
| CN114701863A (en) * | 2022-04-22 | 2022-07-05 | 北京中电博天科技有限公司 | Visual intelligent energy-saving method and device for pneumatic conveying system |
| CN115849012A (en) * | 2022-11-18 | 2023-03-28 | 中冶南方(湖南)工程技术有限公司 | Coke powder pneumatic conveying method and system |
-
2008
- 2008-12-26 CN CNA2008102434870A patent/CN101434345A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102874599A (en) * | 2012-09-25 | 2013-01-16 | 上海发电设备成套设计研究院 | Method for judging idle running of positive-pressure dense-phase bin pump |
| CN103043446A (en) * | 2012-12-27 | 2013-04-17 | 中冶长天国际工程有限责任公司 | Method and system for determining gas transmission interval of pneumatic transmission system |
| CN103043446B (en) * | 2012-12-27 | 2015-07-01 | 中冶长天国际工程有限责任公司 | Method and system for determining gas transmission interval of pneumatic transmission system |
| CN103112722A (en) * | 2013-03-14 | 2013-05-22 | 福建龙净环保股份有限公司 | Energy-saving-type pneumatic ash removal conveying control method and equipment thereof |
| CN103950730A (en) * | 2014-03-19 | 2014-07-30 | 内蒙古电力勘测设计院 | Energy saving control method of thermal power plant pneumatic ash conveying system |
| CN114701863A (en) * | 2022-04-22 | 2022-07-05 | 北京中电博天科技有限公司 | Visual intelligent energy-saving method and device for pneumatic conveying system |
| CN115849012A (en) * | 2022-11-18 | 2023-03-28 | 中冶南方(湖南)工程技术有限公司 | Coke powder pneumatic conveying method and system |
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Application publication date: 20090520 |