CN102393695B - Impregnation alkali blending automatic control system in production of short fiber stock solution viscose - Google Patents
Impregnation alkali blending automatic control system in production of short fiber stock solution viscose Download PDFInfo
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- CN102393695B CN102393695B CN2011102972752A CN201110297275A CN102393695B CN 102393695 B CN102393695 B CN 102393695B CN 2011102972752 A CN2011102972752 A CN 2011102972752A CN 201110297275 A CN201110297275 A CN 201110297275A CN 102393695 B CN102393695 B CN 102393695B
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- alkali
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- impregnation
- stock solution
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- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
Abstract
The invention provides an impregnation alkali blending automatic control system in production of short fiber stock solution viscose. The conventional automatic control system is improved and optimized, and a redundant process control system is constructed by redundant process control software, so that the impregnation alkali blending automatic control system in the production of the short fiber stock solution viscose is established. The control system controls the addition amount of an impregnation alkali raw material, performs comparative analysis on set values of the control system to control the flow rate of each medium, and accurately blends impregnation alkali at required concentration, so that the quality of the subsequent impregnation process and the quality of alkaline fibers obtained by the impregnation process are ensured.
Description
Technical field
The present invention relates to a kind of DCS automation control system, more particularly, the present invention relates to the impregnation alkali blending automatic control system in a kind of short fiber stock solution viscose production.Belong to the regenerated fiber field.
Background technology
Automatically control (automatic control) and refer to utilize additional equipment or device in the situation that nobody participates in directly, certain duty of machine, equipment or production run or parameter are automatically moved according to predetermined rule.Automatically control relative manual control concept, refer in the situation that the no one participates in, utilize control device to make controlled device or process automatically by predetermined rule operation.
The research of automatic control technology is conducive to the mankind be freed and greatly improve from complicated, dangerous, loaded down with trivial details work situation control efficiency.Automatically controlling is a branch of engineering science.It relates to the automatic impact on dynamic system that utilizes feedback principle, so that the value that output valve is wanted near us.From the angle of method, it is take the Systems Theory of mathematics as basis.What we were called automatic control today is a cybernatic branch that produces in the twentieth century middle period.
Viscose glue preparation is one of operation of most important in whole production process of viscose fiber, most critical, it is that the pulp of solid is generated alkali cellulose through dipping, then be transported in xanthating machine and generate cellulose yellow acid fat with the CS2 reaction through squeezing, pulverizing and experienced operation, again cellulose xanthate is dissolved in alkali lye and obtains liquid viscose glue, viscose glue is eliminated wherein impurity and bubble by filtration, deaeration operation, and by maturation technique, adjust viscosity and the degree of ripeness of viscose glue, final production goes out to meet the stock solution viscose of post-order process performance requirement.
In the process of the dipping alkali allotment before dipping, the medium of four kinds of variable concentrations need to be formulated to together, produce finally concentration and meet the alkali lye of technological requirement.Dipping alkali concn and temperature are controlled quality, will directly affect alkali fiber and form and the alkali fiber quality.
Although pair automatic control system of the whole technological process of staple fibre viscose glue stoste production is arranged in prior art, but specific aim is not strong, still to carry out complicated debugging and manual operation, particularly allotment is controlled to the dipping alkali in dip process, prior art can not guarantee plurality of raw materials medium addition, make the precision of concentration allotment not reach requirement, had a strong impact on the quality of follow-up impregnation technology and alkali fiber.
Summary of the invention
The present invention is intended to solve the problem of the automatic control of the whole technological process that prior art middle short fiber viscose glue stoste produces, in dipping alkali allotment during particularly short fiber stock solution viscose is produced, can't accurately control plurality of raw materials medium addition, the problem of impact dipping alkali concn, impregnation alkali blending automatic control system in a kind of short fiber stock solution viscose production is provided, guarantee the precision of technological parameter, reducing fault and accident occurs, farthest reduce manual operation, convenient Real Time Monitoring to whole technique.
In order to realize the foregoing invention purpose, concrete technical scheme of the present invention is:
Impregnation alkali blending automatic control system during short fiber stock solution viscose is produced, comprise that dipping alkali feed line, dipping alkali are for alkali pipe and dipping alkali tempering tank, it is characterized in that: also comprise for receiving and the host computer active station of analytic signal, described host computer active station adopts the redundancy process control software to build the redundancy Process Control System and sets up the impregnation alkali blending automatic control system of short fiber stock solution viscose in producing; The flowrate control valve that is provided with flow PID controller on dipping alkali feed line of the present invention and is attached thereto, be used for controlling the dipping alkali concn; Described flow PID controller is connected with described host computer active station; Described dipping alkali is used for controlling dipping alkali temperature for also being provided with dipping alkali temperature control equipment on the alkali pipe.
Impregnation alkali blending automatic control system in short fiber stock solution viscose production of the present invention is aided with network structure, message alarm logging and the Process History curve at multioperation station, guarantees that whole control procedure is real-time, effective, can review.
It is control core that host computer active station of the present invention adopts Siemens S7-400 H CPU.
Redundancy process control software of the present invention is PCS7 software.
Dipping alkali feed line of the present invention is concentrated base conveyance conduit, demineralized water conveyance conduit, dialysis alkali conveyance conduit and filters the alkali conveyance conduit.
Be provided with density transmitter and PID controller on dipping alkali tempering tank of the present invention, be used for measuring the density of dipping alkali, do the PID computing with the corresponding dipping alkali of the dipping alkali concn density of synthermal lower requirement, operation result is as the offset of formula computing.
The dipping alkali that is arranged on of the present invention comprises well heater, refrigeratory device and temperature sensor for the dipping alkali temperature control equipment on the alkali pipe, and described temperature control equipment is connected with the PID controller.
Above-mentioned well heater is the vapor recycle pipeline; Described refrigeratory is the cooling water circulation pipeline.
Dipping alkali concn of the present invention is alkali content 160-170g/l.
Dipping alkali temperature of the present invention is 50-60 ℃.
The useful technique effect that the present invention arrives:
1, automatic control system employing Siemens S7-400 H CPU of the present invention is control core, use PCS7 software to build the redundancy Process Control System and set up impregnation alkali blending automatic control system, described system is aided with network structure, message alarm logging and the Process History curve at multioperation station, guarantees that whole control procedure is real-time, effective, can review;
2, build the redundancy Process Control System, saved communication time, guaranteed that the complete while of exchanges data also reduced traffic, guarantee also can not affect the operation of whole control system when breaking down;
3, the present invention, by on the conveyance conduit at the required medium of dipping alkali allotment, flow controller being set,, through the comparative analysis of control system setting value, controls the flow of each medium, and precision regulating is allotted the dipping alkali of desired concn;
4, the present invention also is provided with density transmitter, measure the caustic dip density under uniform temperature, with the corresponding caustic dip density of the caustic dip concentration of synthermal lower requirement, do the PID computing, operation result is as the offset of formula computing, adding of control medium flow, accurately control the density of flooding alkali;
5, be subjected to the impact of medium temperature very large due to caustic dip concentration and density, therefore need the strict temperature of controlling dipping alkali.The fine dip process of alkali is a weak exothermic process, the temperature of the temperature of alkali a little more than dipping alkali reclaimed in squeezing, the squeezing recovery alkali that participates in the steeping liquor allotment accounts for 80%～90% of dipping alkali total amount, when environment temperature is higher, the temperature of caustic dip can raise, when environment temperature was low, the caustic dip temperature can reduce.Therefore the present invention supplies set temperature controller on the alkali pipe at dipping alkali, guarantees that the temperature of the dipping alkali of supply dipping process reaches technological requirement, guarantees the quality of alkali fiber;
6, the temperature control equipment of the present invention's employing is vapor recycle heating arrangement and circulating water cooling device; can use the waste gas in production, the control that waste water is used as temperature,, like this with waste recovery, recycle; save production cost, also protected environment can not be subject to large harm.
Description of drawings
Figure of description is structural representation of the present invention.
Embodiment
Embodiment 1
Impregnation alkali blending automatic control system during short fiber stock solution viscose is produced, comprise that dipping alkali feed line, dipping alkali are for alkali pipe and dipping alkali tempering tank, it is characterized in that: also comprise for receiving and the host computer active station of analytic signal, described host computer active station adopts the redundancy process control software to build the redundancy Process Control System and sets up the impregnation alkali blending automatic control system of short fiber stock solution viscose in producing; The flowrate control valve that is provided with flow PID controller on dipping alkali feed line of the present invention and is attached thereto, be used for controlling the dipping alkali concn; Described flow PID controller is connected with described host computer active station; Described dipping alkali is used for controlling dipping alkali temperature for also being provided with dipping alkali temperature control equipment on the alkali pipe.
Impregnation alkali blending automatic control system in short fiber stock solution viscose production of the present invention is aided with network structure, message alarm logging and the Process History curve at multioperation station, guarantees that whole control procedure is real-time, effective, can review.
It is control core that host computer active station of the present invention adopts Siemens S7-400 H CPU.
Redundancy process control software of the present invention is PCS7 software.
Dipping alkali feed line of the present invention is concentrated base conveyance conduit, demineralized water conveyance conduit, dialysis alkali conveyance conduit and filters the alkali conveyance conduit.
Be provided with density transmitter and PID controller on dipping alkali tempering tank of the present invention, be used for measuring the density of dipping alkali, do the PID computing with the corresponding dipping alkali of the dipping alkali concn density of synthermal lower requirement, operation result is as the offset of formula computing.
The dipping alkali that is arranged on of the present invention comprises well heater, refrigeratory device and temperature sensor for the dipping alkali temperature control equipment on the alkali pipe, and described temperature control equipment is connected with the PID controller.
Above-mentioned well heater is the vapor recycle pipeline; Described refrigeratory is the cooling water circulation pipeline.
Dipping alkali concn of the present invention is alkali content 160g/l.
Dipping alkali temperature of the present invention is 50 ℃.
Embodiment 2
Impregnation alkali blending automatic control system during short fiber stock solution viscose is produced, comprise that dipping alkali feed line, dipping alkali are for alkali pipe and dipping alkali tempering tank, it is characterized in that: also comprise for receiving and the host computer active station of analytic signal, described host computer active station adopts the redundancy process control software to build the redundancy Process Control System and sets up the impregnation alkali blending automatic control system of short fiber stock solution viscose in producing; The flowrate control valve that is provided with flow PID controller on dipping alkali feed line of the present invention and is attached thereto, be used for controlling the dipping alkali concn; Described flow PID controller is connected with described host computer active station; Described dipping alkali is used for controlling dipping alkali temperature for also being provided with dipping alkali temperature control equipment on the alkali pipe.
Impregnation alkali blending automatic control system in short fiber stock solution viscose production of the present invention is aided with network structure, message alarm logging and the Process History curve at multioperation station, guarantees that whole control procedure is real-time, effective, can review.
It is control core that host computer active station of the present invention adopts Siemens S7-400 H CPU.
Redundancy process control software of the present invention is PCS7 software.
Dipping alkali feed line of the present invention is concentrated base conveyance conduit, demineralized water conveyance conduit, dialysis alkali conveyance conduit and filters the alkali conveyance conduit.
Be provided with density transmitter and PID controller on dipping alkali tempering tank of the present invention, be used for measuring the density of dipping alkali, do the PID computing with the corresponding dipping alkali of the dipping alkali concn density of synthermal lower requirement, operation result is as the offset of formula computing.
The dipping alkali that is arranged on of the present invention comprises well heater, refrigeratory device and temperature sensor for the dipping alkali temperature control equipment on the alkali pipe, and described temperature control equipment is connected with the PID controller.
Above-mentioned well heater is the vapor recycle pipeline; Described refrigeratory is the cooling water circulation pipeline.
Dipping alkali concn of the present invention is alkali content 170g/l.
Dipping alkali temperature of the present invention is 60 ℃.
Embodiment 3
Impregnation alkali blending automatic control system during short fiber stock solution viscose is produced, comprise that dipping alkali feed line, dipping alkali are for alkali pipe and dipping alkali tempering tank, it is characterized in that: also comprise for receiving and the host computer active station of analytic signal, described host computer active station adopts the redundancy process control software to build the redundancy Process Control System and sets up the impregnation alkali blending automatic control system of short fiber stock solution viscose in producing; The flowrate control valve that is provided with flow PID controller on dipping alkali feed line of the present invention and is attached thereto, be used for controlling the dipping alkali concn; Described flow PID controller is connected with described host computer active station; Described dipping alkali is used for controlling dipping alkali temperature for also being provided with dipping alkali temperature control equipment on the alkali pipe.
Impregnation alkali blending automatic control system in short fiber stock solution viscose production of the present invention is aided with network structure, message alarm logging and the Process History curve at multioperation station, guarantees that whole control procedure is real-time, effective, can review.
It is control core that host computer active station of the present invention adopts Siemens S7-400 H CPU.
Redundancy process control software of the present invention is PCS7 software.
Dipping alkali feed line of the present invention is concentrated base conveyance conduit, demineralized water conveyance conduit, dialysis alkali conveyance conduit and filters the alkali conveyance conduit.
Be provided with density transmitter and PID controller on dipping alkali tempering tank of the present invention, be used for measuring the density of dipping alkali, do the PID computing with the corresponding dipping alkali of the dipping alkali concn density of synthermal lower requirement, operation result is as the offset of formula computing.
The dipping alkali that is arranged on of the present invention comprises well heater, refrigeratory device and temperature sensor for the dipping alkali temperature control equipment on the alkali pipe, and described temperature control equipment is connected with the PID controller.
Above-mentioned well heater is the vapor recycle pipeline; Described refrigeratory is the cooling water circulation pipeline.
Dipping alkali concn of the present invention is alkali content 165g/l.
Dipping alkali temperature of the present invention is 55 ℃.
Embodiment 4
Impregnation alkali blending automatic control system during short fiber stock solution viscose is produced, comprise that dipping alkali feed line, dipping alkali are for alkali pipe and dipping alkali tempering tank, it is characterized in that: also comprise for receiving and the host computer active station of analytic signal, described host computer active station adopts the redundancy process control software to build the redundancy Process Control System and sets up the impregnation alkali blending automatic control system of short fiber stock solution viscose in producing; The flowrate control valve that is provided with flow PID controller on dipping alkali feed line of the present invention and is attached thereto, be used for controlling the dipping alkali concn; Described flow PID controller is connected with described host computer active station; Described dipping alkali is used for controlling dipping alkali temperature for also being provided with dipping alkali temperature control equipment on the alkali pipe.
Impregnation alkali blending automatic control system in short fiber stock solution viscose production of the present invention is aided with network structure, message alarm logging and the Process History curve at multioperation station, guarantees that whole control procedure is real-time, effective, can review.
It is control core that host computer active station of the present invention adopts Siemens S7-400 H CPU.
Redundancy process control software of the present invention is PCS7 software.
Dipping alkali feed line of the present invention is concentrated base conveyance conduit, demineralized water conveyance conduit, dialysis alkali conveyance conduit and filters the alkali conveyance conduit.
Be provided with density transmitter and PID controller on dipping alkali tempering tank of the present invention, be used for measuring the density of dipping alkali, do the PID computing with the corresponding dipping alkali of the dipping alkali concn density of synthermal lower requirement, operation result is as the offset of formula computing.
The dipping alkali that is arranged on of the present invention comprises well heater, refrigeratory device and temperature sensor for the dipping alkali temperature control equipment on the alkali pipe, and described temperature control equipment is connected with the PID controller.
Above-mentioned well heater is the vapor recycle pipeline; Described refrigeratory is the cooling water circulation pipeline.
Dipping alkali concn of the present invention is alkali content 168g/l.
Dipping alkali temperature of the present invention is 51 ℃.
Claims (6)
1. the impregnation alkali blending automatic control system during short fiber stock solution viscose is produced, comprise that dipping alkali feed line, dipping alkali are for alkali pipe and dipping alkali tempering tank, it is characterized in that: also comprise for receiving and the host computer active station of analytic signal, described host computer active station adopts the redundancy process control software to build the redundancy Process Control System and sets up the impregnation alkali blending automatic control system of short fiber stock solution viscose in producing; The flowrate control valve that is provided with flow PID controller on described dipping alkali feed line and is attached thereto, be used for controlling the dipping alkali concn; Described flow PID controller is connected with described host computer active station; Described dipping alkali is used for controlling dipping alkali temperature for also being provided with dipping alkali temperature control equipment on the alkali pipe; Be provided with density transmitter and PID controller on described dipping alkali tempering tank, be used for measuring the density of dipping alkali, with the corresponding dipping alkali of the dipping alkali concn density of synthermal lower requirement, do the PID computing, operation result is as the offset of formula computing; The described dipping alkali that is arranged on comprises well heater, refrigeratory device and temperature sensor for the dipping alkali temperature control equipment on the alkali pipe, and described temperature control equipment is connected with the PID controller; Described dipping alkali concn is alkali content 160-170g/l; Described dipping alkali temperature is 50-60 ℃.
2. the impregnation alkali blending automatic control system during short fiber stock solution viscose according to claim 1 is produced, it is characterized in that: the impregnation alkali blending automatic control system in described short fiber stock solution viscose production is aided with network structure, message alarm logging and the Process History curve at multioperation station.
3. the impregnation alkali blending automatic control system during short fiber stock solution viscose according to claim 1 is produced is characterized in that: it is control core that described host computer active station adopts Siemens S7-400 H CPU.
4. the impregnation alkali blending automatic control system during short fiber stock solution viscose according to claim 1 is produced, it is characterized in that: described redundancy process control software is PCS7 software.
5. the impregnation alkali blending automatic control system during short fiber stock solution viscose according to claim 1 is produced is characterized in that: described dipping alkali feed line is concentrated base conveyance conduit, demineralized water conveyance conduit, dialysis alkali conveyance conduit and filters the alkali conveyance conduit.
6. the impregnation alkali blending automatic control system during short fiber stock solution viscose according to claim 1 is produced, it is characterized in that: described well heater is the vapor recycle pipeline; Described refrigeratory is the cooling water circulation pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2011102972752A CN102393695B (en) | 2011-09-27 | 2011-09-27 | Impregnation alkali blending automatic control system in production of short fiber stock solution viscose |
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| CN2011102972752A CN102393695B (en) | 2011-09-27 | 2011-09-27 | Impregnation alkali blending automatic control system in production of short fiber stock solution viscose |
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| CN102393695A CN102393695A (en) | 2012-03-28 |
| CN102393695B true CN102393695B (en) | 2013-11-13 |
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| CN111636108A (en) * | 2020-06-08 | 2020-09-08 | 宜宾丝丽雅股份有限公司 | Titanium white liquid blending method for viscose fiber production |
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| CN201236223Y (en) * | 2008-06-10 | 2009-05-13 | 宜宾海丝特纤维有限责任公司 | Alkali fiber production apparatus with plant fiber as raw material |
| CN102189237B (en) * | 2008-12-30 | 2013-04-17 | 内蒙古包钢钢联股份有限公司 | System integration technology for dynamic soft reduction of continuously-cast billet |
| CN101702084B (en) * | 2009-04-10 | 2012-06-27 | 中国科学院金属研究所 | High-temperature and high-pressure water circulation control system and control method thereof |
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