CN105113331A - Paper pulp dilution control method - Google Patents
Paper pulp dilution control method Download PDFInfo
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- CN105113331A CN105113331A CN201510428908.7A CN201510428908A CN105113331A CN 105113331 A CN105113331 A CN 105113331A CN 201510428908 A CN201510428908 A CN 201510428908A CN 105113331 A CN105113331 A CN 105113331A
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Abstract
The invention discloses a paper pulp dilution control method, which specifically includes the steps of: (a) data acquisition; (b) feedforward modeling: detecting the real-time paper pulp concentration between first dilution and second dilution, by means of a mathematical conversion model, providing the data to a secondary concentration controller A1C to serve as a feedforward signal; (c) parameter setting: conducting parameter setting on a first concentration controller A2C and the secondary concentration controller A1C through the feedforward signal and the pulp concentration; and (d) concentration recording. According to the invention, through a double-impulse control means, the paper pulp is diluted in two steps, the real-time paper pulp concentration is detected between first dilution and second dilution to provide the feedforward signal to the secondary concentration controller A1C, so that the diluted paper pulp concentration can be more stable and controllable, the paper pulp concentration expectation can be traced rapidly and accurately, the process fluctuation and concentration variance can be reduced, the reaction speed and control accuracy of the process method are effectively enhanced, and the method is easy to realize computer control.
Description
[technical field]
The present invention relates to the technical field of pulp consistency control method in pulping technique field, particularly pulping process.
[background technology]
The concentration of paper pulp must be controlled in paper stock preparation process.Concentration refers to the mass percent of the fine material of over dry in the mixture of paper pulp and water.The method of manual measurement concentration comprises sampling, weighs, the moisture removed in sample, weigh up the quality etc. of residue sample again.These class methods are suitable for sampling check, are not suitable for continuous control.Require during continuous control to carry out real-time, online detection to the change of concentration, the technology about hard measurement is had to be applied to the detection of beating consistency in recent years, technique generally will store paper pulp in higher concentrations, to reduce the volume of pulp storage tank, but with Pipeline transport high concentration paper pulp benefit list is difficult and efficiency comparison is low, therefore, dilution water is added in the paper pulp usually adopting concentration control method to export to pulp storage tank.
When system makes pulp density reduce by 0.5% ~ 1%, usual employing singly dilutes control method, by concentration detecting unit CE, consistency transmitter AT, auxiliary record instrument AR, concentration records controller AC, and is arranged on the control valve composition on dilution tube.When requiring the amount of dilution of pulp density more than 0.5% ~ 1%, normal employing two dilution control method, is added water by two steps and realizes.The high concentration stock tank being greater than 6% in concentration generally adopts the method.One time dilution is by controller A
2c and control valve add most of water have been come.But in two dilution control method, after once diluting, there is not the detection of pulp density, make secondary dilution process not have feedback information, make the final pulp density obtained there is fluctuation.
[summary of the invention]
Object of the present invention solves the problems of the prior art exactly, proposes a kind of pulp dilution control method, obviously can reduce the variance of final pulp density, effectively improve the control accuracy of process approach, and is easy to realize computer control.
For achieving the above object, the present invention proposes a kind of pulp dilution control method, described control method utilizes Two-impulse control mode, in two steps diluted pulp, and once detecting the concentration of real-time paper pulp between dilution and secondary dilution, namely to secondary controller A
1c provides feed-forward signal, and the pulp density after making to dilute is more stable and controlled, and concrete steps comprise:
(a) data acquisition: gather the pulp density information of high concentration pulp storage tank, once dilute valve opening, secondary dilution valve opening, a consistency controller A
2c parameter, secondary consistency controller A
1c parameter;
(b) feedforward modeling: once detecting the concentration of real-time paper pulp between dilution and secondary dilution, be supplied to secondary consistency controller A by mathematical conversion model
1c is as feed-forward signal;
(c) parameter tuning: the concentration flowed by feed-forward signal and slurry is to a consistency controller A
2c, secondary consistency controller A
1c carries out parameter tuning, wherein a consistency controller A
2the input signal of C carrys out the secondary consistency controller A in self-loop
1the signal that C exports to control valve;
(d) concentration records: utilize auxiliary record instrument AR to carry out record to pulp density in slurry stream, the historical analysis of pulp density can be carried out, by optimum or the secondary figure of merit of numerical value determination controller tuning.
As preferably, in described (a) step, the corresponding relation of the concentration of different model, not isometric high concentration pulp storage tank and concentration valve, secondary concentration valve is also inconsistent, needs to control according to the mode such as design load, experiment value.
As preferably, in described (b) step, the foundation of feed forward models is depended on valve information, duct size information and is once diluted the concentration information of rear paper pulp, and the height of modeling accuracy directly determines the control of the secondary dilution water yield, has significant impact to the concentration in final slurry stream.
As preferably, in described (c) step, a consistency controller A
2c, secondary consistency controller A
1the precedence of C parameter tuning first carries out secondary consistency controller A
1adjusting of C parameter, then the signal after adjusting is transported to a consistency controller A respectively
2c and secondary concentration valve.
Beneficial effect of the present invention: the present invention by doublepulse control mode, diluted pulp in two steps, and once detecting the concentration of real-time paper pulp between dilution with secondary dilution, to secondary controller A
1c provides feed-forward signal, pulp density after making to dilute is more stable and controlled, quick and precisely can follow the tracks of pulp density and expect, reduces fluctuation and the concentration variance of process, effectively improve reaction speed and the control accuracy of process approach, and be easy to realize computer control.
Feature of the present invention and advantage will be described in detail by reference to the accompanying drawings by embodiment.
[accompanying drawing explanation]
Fig. 1 is the system diagram of a kind of pulp dilution control method of the present invention;
Fig. 2 is the flow chart of a kind of pulp dilution control method of the present invention.
[detailed description of the invention]
Consult Fig. 1 and Fig. 2, a kind of pulp dilution control method of the present invention, concrete steps comprise:
Step one, gather high concentration pulp storage tank pulp density information, once dilute valve opening, secondary dilution valve opening, a consistency controller A
2c parameter, secondary consistency controller A
1c parameter;
Step 2, once detecting the concentration of real-time paper pulp between dilution with secondary dilution, be supplied to secondary consistency controller A by mathematical conversion model
1c is as feed-forward signal;
Step 3, by feed-forward signal and slurry stream concentration to a consistency controller A
2c, secondary consistency controller A
1c carries out parameter tuning, wherein a consistency controller A
2the input signal of C carrys out the secondary consistency controller A in self-loop
1the signal that C exports to control valve;
Step 4, utilize auxiliary record instrument AR to slurry stream in pulp density carry out record, the historical analysis of pulp density can be carried out, by optimum or the secondary figure of merit of numerical value determination controller tuning.
In step one, the corresponding relation of the concentration of different model, not isometric high concentration pulp storage tank and concentration valve, secondary concentration valve is also inconsistent, needs to control according to the mode such as design load, experiment value.
In step 2, the foundation of feed forward models is depended on valve information, duct size information and is once diluted the concentration information of rear paper pulp, and the height of modeling accuracy directly determines the control of the secondary dilution water yield, has significant impact to the concentration in final slurry stream.
In step 3, a consistency controller A
2c, secondary consistency controller A
1the precedence of C parameter tuning first carries out secondary consistency controller A
1adjusting of C parameter, then the signal after adjusting is transported to a consistency controller A respectively
2c and secondary concentration valve.
The course of work of the present invention:
A kind of pulp dilution control method of the present invention by doublepulse control mode, diluted pulp in two steps, and once detecting the concentration of real-time paper pulp between dilution with secondary dilution, to secondary controller A
1c provides feed-forward signal, pulp density after making to dilute is more stable and controlled, quick and precisely can follow the tracks of pulp density and expect, reduces fluctuation and the concentration variance of process, effectively improve reaction speed and the control accuracy of process approach, and be easy to realize computer control.
Above-described embodiment is to explanation of the present invention, is not limitation of the invention, anyly all belongs to protection scope of the present invention to the scheme after simple transformation of the present invention.
Claims (4)
1. a pulp dilution control method, described control method utilizes Two-impulse control mode, in two steps diluted pulp, and once detecting the concentration of real-time paper pulp between dilution and secondary dilution, namely to secondary controller A
1c provides feed-forward signal, and the pulp density after making to dilute is more stable and controlled, and concrete steps comprise:
(a) data acquisition: gather the pulp density information of high concentration pulp storage tank, once dilute valve opening, secondary dilution valve opening, a consistency controller A
2c parameter, secondary consistency controller A
1c parameter;
(b) feedforward modeling: once detecting the concentration of real-time paper pulp between dilution and secondary dilution, be supplied to secondary consistency controller A by mathematical conversion model
1c is as feed-forward signal;
(c) parameter tuning: the concentration flowed by feed-forward signal and slurry is to a consistency controller A
2c, secondary consistency controller A
1c carries out parameter tuning, wherein a consistency controller A
2the input signal of C carrys out the secondary consistency controller A in self-loop
1the signal that C exports to control valve;
(d) concentration records: utilize auxiliary record instrument AR to carry out record to pulp density in slurry stream, the historical analysis of pulp density can be carried out, by optimum or the secondary figure of merit of numerical value determination controller tuning.
2. a kind of pulp dilution control method as claimed in claim 1, it is characterized in that: in described (a) step, the corresponding relation of the concentration of different model, not isometric high concentration pulp storage tank and concentration valve, secondary concentration valve is also inconsistent, needs to control according to the mode such as design load, experiment value.
3. a kind of pulp dilution control method as claimed in claim 1, it is characterized in that: in described (b) step, the foundation of feed forward models is depended on valve information, duct size information and is once diluted the concentration information of rear paper pulp, the height of modeling accuracy directly determines the control of the secondary dilution water yield, has significant impact to the concentration in final slurry stream.
4. a kind of pulp dilution control method as claimed in claim 1, is characterized in that: in described (c) step, a consistency controller A
2c, secondary consistency controller A
1the precedence of C parameter tuning first carries out secondary consistency controller A
1adjusting of C parameter, then the signal after adjusting is transported to a consistency controller A respectively
2c and secondary concentration valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510428908.7A CN105113331A (en) | 2015-07-20 | 2015-07-20 | Paper pulp dilution control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510428908.7A CN105113331A (en) | 2015-07-20 | 2015-07-20 | Paper pulp dilution control method |
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| Publication Number | Publication Date |
|---|---|
| CN105113331A true CN105113331A (en) | 2015-12-02 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510428908.7A Pending CN105113331A (en) | 2015-07-20 | 2015-07-20 | Paper pulp dilution control method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106758469A (en) * | 2016-12-30 | 2017-05-31 | 陕西科技大学 | A kind of the paper pulp reflux dilution system and its control method of middle-size and small-size slurry tower |
| CN110468619A (en) * | 2019-09-24 | 2019-11-19 | 广西贺州市红星纸业有限公司 | A kind of concentration regulating method based on middle high consistency pulping paper technology |
-
2015
- 2015-07-20 CN CN201510428908.7A patent/CN105113331A/en active Pending
Non-Patent Citations (3)
| Title |
|---|
| 侯跃新等: "纸浆浓度控制系统设计", 《自动化技术与应用》 * |
| 张志秀等: "浅论纸浆浓度控制系统的设计", 《西南造纸》 * |
| 贾晓静等: "基于SMS的纸浆浓度调节系统", 《电脑知识与技术(学术交流)》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106758469A (en) * | 2016-12-30 | 2017-05-31 | 陕西科技大学 | A kind of the paper pulp reflux dilution system and its control method of middle-size and small-size slurry tower |
| CN110468619A (en) * | 2019-09-24 | 2019-11-19 | 广西贺州市红星纸业有限公司 | A kind of concentration regulating method based on middle high consistency pulping paper technology |
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Application publication date: 20151202 |
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