CN1009768B - Raw meal composition charge ratio autocontrol system for vertical furnance - Google Patents
Raw meal composition charge ratio autocontrol system for vertical furnanceInfo
- Publication number
- CN1009768B CN1009768B CN 86108905 CN86108905A CN1009768B CN 1009768 B CN1009768 B CN 1009768B CN 86108905 CN86108905 CN 86108905 CN 86108905 A CN86108905 A CN 86108905A CN 1009768 B CN1009768 B CN 1009768B
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- CN
- China
- Prior art keywords
- value
- control
- raw material
- rate
- flow
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- Curing Cements, Concrete, And Artificial Stone (AREA)
- Silicates, Zeolites, And Molecular Sieves (AREA)
- Muffle Furnaces And Rotary Kilns (AREA)
- Control Of Non-Electrical Variables (AREA)
Abstract
The present invention relates to an advanced, practical and economical automatic control system for proportioning the raw material components of a cement plant with a vertical kiln. Aiming at the problem that main material components in the raw materials of a cement plant with a vertical kiln largely fluctuate, a specific control method of double closed loops is adopted. The method comprises the following steps: a given value controller for a flow rate and a microcomputer nuclear scale are used for controlling the flow rate of main materials in the raw materials according to a given value; the given value of the flow rate is readjusted by a rate value controller for raw materials and a rapid analyzer for five elemental components; the rate value of the raw materials (KH, N, P) is kept stable and qualified. The present invention is suitable for various technical processes of the cement plant with a vertical kiln. Original devices and factory buildings are slightly reformed, so the present invention has the advantages of little investment and rapid effect taking. The present invention is particularly suitable for the technical innovation of the cement plant with a vertical kiln.
Description
The present invention relates to the feed intake control of composition proportion process of microcomputer nuclear measurement instrument industry process control, particularly factory.
Now external manufacture of cement adopts large-sized rotary kiln mostly.Carry out full elemental analysis with large-scale x-ray fluorescence analyzer, cooperate buncher control mass flow, whole raw material system automation degree height with the special electronic scale.But equipment investment is big, is not suitable for shaft kiln cement plant.
China cement mill mostly is vertical kiln system greatly, does not still have vertical kiln raw material composition proportion automatic control system at present.
The flow of several main materials in the raw material is promptly controlled in the charging of domestic existing microcomputer raw-meal ingredient.But shaft kiln cement plant does not generally have large-scale homogenizing storehouse, and the material component fluctuation is bigger, therefore only controls the proportioning control that mass flow still can't be realized raw ingredients.And the vertical kiln raw material proportioning feed system that adopts mechanical scale or electronic scales to measure mass flow exists precision low, and shortcomings such as long-time stability difference can not guarantee raw material lime saturation ratio KH value, and stablizing of silicon rate N value, aluminium rate P value is qualified.
The objective of the invention is to find out the automatic control system of the composition proportion process of shaft kiln cement plant, shaft kiln cement plant production charging is constantly adjusted when carrying out, make proportioning quite accurate.
Process of the present invention is to find a kind of new dual closed-loop control system of suitable shaft kiln cement plant.Realize the automatic control of raw ingredients proportioning with flow rate set value controller and raw material rate value controller.
The flow rate set value controller is controlled microcomputer, special software, time control transducer lock in time and feeding control executing mechanism by industrial process and is formed.Use the main material actual flow of controlled nucleon operated belt conveyor scale on-line measurement.Be input in the microcomputer and compare with the mass flow definite value, frequency characteristic and feedback transfer function according to system, obtain back the control amount with special software, by returning control transducer lock in time, change silicon controlled conduction angle in the feeder topworks, adjust mass flow, realize the closed-loop control of mass flow.(first reclose ring control) so be not subjected to the influence of belt tension, material impact, do not disturbed by environment temperature and dust also because of uclear scale contact with belt, thereby can realize that material accurately adjusts, and be qualified to reach stablizing of raw ingredients.
The raw material rate value controller is made up of control microcomputer, dedicated computing software and the data communication interface and the rapid fluorescence five elements analytical instrument that have a long cable remote control transmission photoelectrical coupler.Use rapid fluorescence five elements analytical instrument quick sampling to measure five kinds of component contents such as calcium, iron, silicon, aluminium, charcoal in the raw material, be transferred to the control microcomputer through the cable remote control, calculate each three rate values of raw material array constantly, frequency characteristic and feedback transfer function according to system, calculate and adjust the flow set-point of several materials with tendency method, realize that the definite value of three rate values of raw material (KH value, N value, P value) is controlled.(second recloses encircles control).
The principle of raw meal composition charge ratio autocontrol system for vertical furnance and particular content are as shown in Figure 1.
Four kinds of main material lime stones, clay, iron powder and coals forming raw material are stored in feed bin A respectively
1, A
2, A
2, A
4In, by feeder B
1, B
2, B
3, B
4Down to dividing belt C
1, C
2, C
3, C
4On.A controlled nucleon operated belt conveyor scale D respectively is installed on four branch belts
1, D
2, D
3, D
4, four kinds of material actual flows of instantaneous on-line measurement.The measurement letter is led and is input to flow rate set value controller E
1, E
2, E
3, E
4In, through with the people for presetting four kinds of mass flow set-point I that (L sends here by control desk) or raw material rate value controller provide
1, I
2, I
3, I
4Relatively, calculate back the control amount, by returning control transducer P lock in time with special software
1, P
2, P
3, P
4Change thyristor operating angle in the feeder topworks, control feeder B
1, B
2, B
3, B
4Feeding capacity, realize the first ring feedback regulation control of reclosing, i.e. the definite value of mass flow control.
In view of compositions such as calcium, silicon, aluminium in shaft kiln cement plant main material, particularly lime stone, the clay often fluctuate, only there is flow rate set value control can not guarantee the qualified of composition proportion in the raw material.For this reason, after total belt F entered raw mill G, to the sampler H place between the raw material silo N, taking-up was regularly ground raw material and is made sample and deliver to and carry out quick composition measurement in the analytical instrument J at the mill tail four kinds of mixing of materials.Each measurement result constantly is in cable is input to raw material rate value controller K.In controller K, at first calculate actual, weigh three whether qualified rate values of raw ingredients proportioning: KH value (raw material lime saturation ratio) N value (silicon rate) P value (aluminium rate), and with the qualification rate value comparison that will reach.Because raw material will be through bigger time delay to going out mill back sampler H from blanking belt C, therefore the frequency characteristic of the second reclosing ring control is far below first weight, therefore will be according to the variation tendency of a series of sample time of measured value, calculate by special software, adjust the flow set-point I of four kinds of materials with tendency method
1, I
2, I
3, I
4, changing to offset the raw ingredients that causes owing to the material component fluctuation, realization second is reclosed and is encircled control: the definite value control of raw material rate value.
L is a raw material system centre control desk.It comprises: realize interactive operation keyboard, various switch knobs, various parameter display, pilot lamp and the printer manually controlled with microcomputer.In fact it has comprised whole hardware and softwares of industrial process control microcomputer itself and the dual close-loop automatic adjustment of realization system.
The main material component of raw material that M provides for manufacturer, the calorific value of coal, ash content, and known arrays such as three rate values of desired raw material and permission fluctuation range can obtain initial mass flow set-point I through special software calculating
1, I
2, I
3, I
4This control desk can be monitored the whole raw material production run of shaft kiln cement plant, can numeral show relevant surveying instrument, regulator 60 surplus kind of parameter, can the class's of statistics output, day output, raw ingredients, raw material rate value situation of change, and print production report.
The present invention is owing to adopt dual closed-loop control, with advanced non-contact type nuclear instrument, realized that the composition proportion that shaft kiln cement plant fails to solve for many years always controls automatically, will play huge effect for improving the shaft kiln cement plant product quality.Native system does not disturb the original technological process in cement mill, small investment, instant effect, has advance, practicality, economy, is easy to be accepted by shaft kiln cement producer.
Claims (2)
1, a kind of raw ingredients ratio autocontrol system of shaft kiln cement station-service, it is characterized in that described system is dual closed-loop control system, this system comprises flow rate set value controller and raw material rate value controller, and described flow rate set value controller is controlled microcomputer, dedicated computing software, time control transducer lock in time and feeding control executing mechanism by industrial process and formed; Described raw material rate value controller is by the control microcomputer, dedicated computing software and the data communication interface and the rapid fluorescence five elements analytical instrument that have a long cable remote control transmission photoelectrical coupler are formed, described mass flow (promptly first) closed-loop control is to use uclear scale on-line measurement major ingredient actual flow, institute's measured value input microcomputer and mass flow definite value are relatively, frequecy characteristic and feedback transfer function according to system, obtain back the control amount with special software, and pass through back control transducer lock in time and change silicon controlled conduction angle in the feeder topworks, adjust the flow of material, realize streams value (promptly first) closed-loop control, described raw material rate value (KH value, the N value, the P value) definite value (promptly second) closed-loop control is to use calcium in the rapid fluorescence five elements analytical instrument sampling determination raw material, iron, silicon, aluminium, five kinds of component contents such as charcoal, be transferred to the control microcomputer through the cable remote control, calculate each three rate values of raw material array constantly, frequecy characteristic and feedback transfer function according to system, calculate and adjust the flow set-point of several materials with tendency method, realize definite value (promptly second) closed-loop control of raw material rate value.
2, automatic control system as claimed in claim 1 is characterized in that four kinds of main raw material are stored in feed bin A respectively
1, A
2, A
3, A
4In, by feeder B
1, B
2, B
3, B
4Down to dividing belt C
1, C
2, C
3, C
4On, a controlled nucleon operated belt conveyor scale D is installed respectively on four branch belts
1, D
2, D
3, D
4The actual flow that is used for four kinds of materials of instantaneous on-line measurement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 86108905 CN1009768B (en) | 1986-12-31 | 1986-12-31 | Raw meal composition charge ratio autocontrol system for vertical furnance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 86108905 CN1009768B (en) | 1986-12-31 | 1986-12-31 | Raw meal composition charge ratio autocontrol system for vertical furnance |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN86108905A CN86108905A (en) | 1988-07-20 |
| CN1009768B true CN1009768B (en) | 1990-09-26 |
Family
ID=4804100
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 86108905 Expired CN1009768B (en) | 1986-12-31 | 1986-12-31 | Raw meal composition charge ratio autocontrol system for vertical furnance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1009768B (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1049200C (en) * | 1994-03-08 | 2000-02-09 | 中国建筑材料科学研究院设计所 | Method for controlling the raw ingredients of cement |
| CN101458517B (en) * | 2007-12-14 | 2010-10-27 | 中国科学院沈阳自动化研究所 | Raw material rate value optimizing and controlling method for cement raw material batching system |
| CN106796435B (en) * | 2014-08-22 | 2020-06-02 | 可耐福石膏两合公司 | Apparatus and method for mixing loose rock material |
| CN104596814A (en) * | 2014-11-28 | 2015-05-06 | 广西鱼峰水泥股份有限公司 | Production method of fluorescence analysis raw material with high contrast qualified rate |
| CN104634801A (en) * | 2014-11-28 | 2015-05-20 | 广西鱼峰水泥股份有限公司 | Technology for improving comparison yield of fluorescence analysis raw materials |
| CN104390994A (en) * | 2014-11-28 | 2015-03-04 | 广西鱼峰水泥股份有限公司 | Method for producing high-contrast yield fluorescence analysis raw material |
| CN104569016A (en) * | 2014-11-28 | 2015-04-29 | 广西鱼峰水泥股份有限公司 | Method for increasing raw material comparison passing percent through fluorescence analysis |
| CN104597066A (en) * | 2014-11-28 | 2015-05-06 | 广西鱼峰水泥股份有限公司 | Method for improving contrast qualified rate of fluorescence analysis raw material |
| CN104374791A (en) * | 2014-11-28 | 2015-02-25 | 广西鱼峰水泥股份有限公司 | Technology for producing fluorometric-analysis raw material with high contrastive acceptability |
| CN104655665A (en) * | 2014-11-28 | 2015-05-27 | 广西鱼峰水泥股份有限公司 | Process capable of improving contrast yield of fluorescence analysis raw material |
-
1986
- 1986-12-31 CN CN 86108905 patent/CN1009768B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CN86108905A (en) | 1988-07-20 |
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