CN102008995A - Load automatic controller of coal mill of boiler - Google Patents
Load automatic controller of coal mill of boiler Download PDFInfo
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- CN102008995A CN102008995A CN200910187268XA CN200910187268A CN102008995A CN 102008995 A CN102008995 A CN 102008995A CN 200910187268X A CN200910187268X A CN 200910187268XA CN 200910187268 A CN200910187268 A CN 200910187268A CN 102008995 A CN102008995 A CN 102008995A
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- transmitter
- coal
- coal mill
- coal pulverizer
- boiler
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- Disintegrating Or Milling (AREA)
Abstract
The invention relates to the technical field of automatic control of coal mills of boilers, in particular a load automatic controller of a coal mill of a boiler, which comprises a DCS controller connected with an industrial controller through a system bus, a milling sound transmitter, a temperature transmitter, a current transmitter of a motor of the coal mill, a negative pressure transmitter at entry of the coal mill and a control signal output line. The output semaphore of the milling sound transmitter, the current transmitter of a motor of the coal mill and the negative pressure transmitter at entry of the coal mill is 4-20mA. The output semaphore of the temperature transmitter pt 100 is 4-20mA. The invention has the advantages of maximal coal mill power, over 20% of saved energy and reduced steel ball consumption. The process of powder preparation is stable, thereby accidents due to overlarge coal feed of the coal mill can be avoided.
Description
Technical field
The present invention relates to boiler coal pulverizer automatic control technology field, particularly a kind of boiler coal pulverizer load automaton.
Background technology
When boiler adopted coal-powder boiler, the manufacturing of coal dust was one of important process, and coal pulverizer is exactly one of visual plant of finishing this work.Coal pulverizer also utilizes hot blast that coal dust is carried out drying except that coal cinder is worn into the coal dust, and the coal dust that is dried to a certain degree just can be convenient to carry and store.It is very high from the ratio of electricity consumption that the power consumption of coal pulverizer accounts for power plant, and therefore, the situation of exerting oneself that how to improve ball mill is the key issue of saving energy and reduce the cost.At present, the manual adjustment ventilation that some factories and miness adopts, and the mode of the following coal amount of vibrations feeder control the load of coal pulverizer, but, can not effectively guarantee the EIAJ of coal pulverizer system because the untimely and operant level of manual adjustment differs.Also some factory adopts a kind of ball mill automatic optimal control system, but, this control method complexity, control mode are easy to be subjected to the influence that ature of coal is done wet, wind-warm syndrome etc., are easy to cause chute blockage or cause loading excessive and accident that cause ball mill equipment to damage.
Summary of the invention
The purpose of this invention is to provide a kind of controlled quentity controlled variable and control the boiler coal pulverizer load automaton that the size of vibration feeder electric current is controlled the fuel coal briquette made amount of sending into coal pulverizer by adjuster output.
The objective of the invention is that part by the following technical programs realizes.
Boiler coal pulverizer load automaton of the present invention, it is characterized in that comprising the DCS controller that is connected with Industrial Control Computer by system bus, the mill sound transmitter, temperature transmitter, the current transducer of motor of coal crusher, the coal pulverizer entrance negative pressure transmitter that are connected of the input card of DCS controller therewith respectively, the control signal output line that is connected of the output card of DCS controller therewith, this control signal output line is connected with the controller of vibration feeder.
The output signal amount of described mill sound transmitter is 4～20mA.
Described temperature transmitter is pt100.
The output signal amount of the current transducer of described motor of coal crusher, coal pulverizer entrance negative pressure transmitter is 4～20mA.
The output signal amount of described control signal output line is 4～20mA.
The present invention utilizes the mill sound sensor to gather the signal of coal pulverizer coal-grinding sound, judges the size of coal pulverizer load, the sound oppressiveness big time of loading, and the sound of loading little the time is louder.The detected signal strength signal intensity of this sensor is transformed into the 4-20mA standard signal by the processing of this sensor, and this signal is inserted the DCS controller as controlled volume.Vibrate the size of feeder electric current by the controlled quentity controlled variable control of DCS controller output and control the fuel coal briquette made amount of sending into coal pulverizer, consider also that simultaneously coal is subjected to weather effect, the degree of drying influence factor that exists is determined reasonably setting value by practical operating experiences.Finely tune with the ature of coal difference.The program of rationally working out then in the DCS controller is carried out limit value to the controlled quentity controlled variable of feeder, avoids the coal pulverizer chute blockage to cause the accident.
Advantage of the present invention has:
1) makes the coal-grinding maximum of exerting oneself.Energy-conservation more than 20%, reduced plant consumption effectively.
2) reduce the steel ball consumption.
3) make pulverizing process steady, prevent from that the coal pulverizer coal input quantity is excessive to cause the accident.
Description of drawings
Fig. 1 is a circuit block diagram of the present invention.
The specific embodiment
Below in conjunction with description of drawings the specific embodiment of the present invention.
As shown in Figure 1, boiler coal pulverizer load automaton of the present invention, it is characterized in that comprising the DCS controller 3 that is connected with Industrial Control Computer 1 by system bus 2, the mill sound transmitter 6, temperature transmitter 7, the current transducer 8 of motor of coal crusher, the coal pulverizer entrance negative pressure transmitter 9 that are connected of the input card 4 of DCS controller 3 therewith respectively, the control signal output line 10 that is connected of the output card 5 of DCS controller therewith, this control signal output line 10 is connected with the controller of vibration feeder.
The output signal amount of described mill sound transmitter 6 is 4～20mA.
Described temperature transmitter 7 is pt100.
The output signal amount of the current transducer of described motor of coal crusher, coal pulverizer entrance negative pressure transmitter is 4～20mA.
The output signal amount of described control signal output line is 4～20mA.
The present invention controls the fuel coal briquette made amount of sending into coal pulverizer effectively by the size of the controlled quentity controlled variable control vibration feeder electric current of adjuster output, has avoided the coal pulverizer chute blockage to cause the accident.
Claims (5)
1. boiler coal pulverizer load automaton, it is characterized in that comprising the DCS controller that is connected with Industrial Control Computer by system bus, the mill sound transmitter, temperature transmitter, the current transducer of motor of coal crusher, the coal pulverizer entrance negative pressure transmitter that are connected of the input card of DCS controller therewith respectively, the control signal output line that is connected of the output card of DCS controller therewith, this control signal output line is connected with the controller of vibration feeder.
2. boiler coal pulverizer load automaton according to claim 1, the output signal amount that it is characterized in that described mill sound transmitter is 4～20mA.
3. boiler coal pulverizer load automaton according to claim 1 is characterized in that described temperature transmitter is pt100.
4. boiler coal pulverizer load automaton according to claim 1 is characterized in that the current transducer of described motor of coal crusher, the output signal amount of coal pulverizer entrance negative pressure transmitter are 4～20mA.
5. boiler coal pulverizer load automaton according to claim 1, the output signal amount that it is characterized in that described control signal output line is 4～20mA.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910187268XA CN102008995A (en) | 2009-09-04 | 2009-09-04 | Load automatic controller of coal mill of boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910187268XA CN102008995A (en) | 2009-09-04 | 2009-09-04 | Load automatic controller of coal mill of boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102008995A true CN102008995A (en) | 2011-04-13 |
Family
ID=43839436
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910187268XA Pending CN102008995A (en) | 2009-09-04 | 2009-09-04 | Load automatic controller of coal mill of boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102008995A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103203276A (en) * | 2012-01-15 | 2013-07-17 | 湖南晟通科技集团有限公司 | A control method and a system for a scraper coal feeder |
| CN105629932A (en) * | 2015-12-31 | 2016-06-01 | 河南省电力勘测设计院 | Pulverizing system remote control method and pulverizing remote integrated control system |
| CN111013803A (en) * | 2019-12-17 | 2020-04-17 | 浙江浙能技术研究院有限公司 | Coal mill power distribution-based thermal power generating unit coal amount distribution control method |
-
2009
- 2009-09-04 CN CN200910187268XA patent/CN102008995A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103203276A (en) * | 2012-01-15 | 2013-07-17 | 湖南晟通科技集团有限公司 | A control method and a system for a scraper coal feeder |
| CN103203276B (en) * | 2012-01-15 | 2017-03-22 | 晟通科技集团有限公司 | A control method and a system for a scraper coal feeder |
| CN105629932A (en) * | 2015-12-31 | 2016-06-01 | 河南省电力勘测设计院 | Pulverizing system remote control method and pulverizing remote integrated control system |
| CN105629932B (en) * | 2015-12-31 | 2018-06-22 | 中国电建集团河南省电力勘测设计院有限公司 | Pulverized coal preparation system long-range control method and powder remote comprehensive control system processed |
| CN111013803A (en) * | 2019-12-17 | 2020-04-17 | 浙江浙能技术研究院有限公司 | Coal mill power distribution-based thermal power generating unit coal amount distribution control method |
| CN111013803B (en) * | 2019-12-17 | 2021-04-30 | 浙江浙能技术研究院有限公司 | Coal mill power distribution-based thermal power generating unit coal amount distribution control method |
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Application publication date: 20110413 |