CN102144149B - Method and equipment for controlling reject handling in pulping process - Google Patents
Method and equipment for controlling reject handling in pulping process Download PDFInfo
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- CN102144149B CN102144149B CN2009801349464A CN200980134946A CN102144149B CN 102144149 B CN102144149 B CN 102144149B CN 2009801349464 A CN2009801349464 A CN 2009801349464A CN 200980134946 A CN200980134946 A CN 200980134946A CN 102144149 B CN102144149 B CN 102144149B
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- 238000000034 method Methods 0.000 title claims abstract description 29
- 238000004537 pulping Methods 0.000 title claims abstract description 15
- 230000008569 process Effects 0.000 title claims abstract description 14
- 239000000835 fiber Substances 0.000 claims abstract description 27
- 239000000725 suspension Substances 0.000 claims abstract description 16
- 238000002360 preparation method Methods 0.000 claims abstract description 7
- 238000012216 screening Methods 0.000 claims description 31
- 239000002994 raw material Substances 0.000 claims description 10
- 238000012545 processing Methods 0.000 claims description 5
- 238000004886 process control Methods 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 13
- 238000005259 measurement Methods 0.000 description 26
- 230000007246 mechanism Effects 0.000 description 13
- 239000000463 material Substances 0.000 description 12
- 230000001105 regulatory effect Effects 0.000 description 11
- 238000005520 cutting process Methods 0.000 description 7
- 239000012535 impurity Substances 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 4
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 230000001276 controlling effect Effects 0.000 description 4
- 239000004033 plastic Substances 0.000 description 4
- 229920003023 plastic Polymers 0.000 description 4
- 239000007858 starting material Substances 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000005452 bending Methods 0.000 description 3
- 239000002657 fibrous material Substances 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
- 239000002985 plastic film Substances 0.000 description 3
- 239000004576 sand Substances 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000011087 paperboard Substances 0.000 description 2
- 229920006255 plastic film Polymers 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- 229920001131 Pulp (paper) Polymers 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 239000011111 cardboard Substances 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
- B66D1/00—Rope, cable, or chain winding mechanisms; Capstans
- B66D1/28—Other constructional details
- B66D1/40—Control devices
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
- D21B1/00—Fibrous raw materials or their mechanical treatment
- D21B1/04—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres
- D21B1/12—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by wet methods, by the use of steam
- D21B1/30—Defibrating by other means
- D21B1/32—Defibrating by other means of waste paper
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
- D21B1/00—Fibrous raw materials or their mechanical treatment
- D21B1/04—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres
- D21B1/12—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by wet methods, by the use of steam
- D21B1/30—Defibrating by other means
- D21B1/34—Kneading or mixing; Pulpers
- D21B1/345—Pulpers
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
- G01B11/06—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness for measuring thickness ; e.g. of sheet material
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
- G01P3/36—Devices characterised by the use of optical means, e.g. using infrared, visible, or ultraviolet light
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
- G01P3/64—Devices characterised by the determination of the time taken to traverse a fixed distance
- G01P3/68—Devices characterised by the determination of the time taken to traverse a fixed distance using optical means, i.e. using infrared, visible, or ultraviolet light
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D27/00—Simultaneous control of variables covered by two or more of main groups G05D1/00 - G05D25/00
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/64—Paper recycling
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Electromagnetism (AREA)
- Power Engineering (AREA)
- Automation & Control Theory (AREA)
- Paper (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
A method and equipment for controlling reject handling in a pulping process which has a pulper (1) for the preparation of a fibre pulp suspension and a ragger (2) for the removal of reject from the pulper (1) in the form of a ragger rope (4). The method comprises measuring at least one property of the ragger rope (4) of the ragger (2) and/or at least one effect caused by the ragger rope (4) on the ragger (2) and/or the rate of travel of the ragger rope (4) and/or at least one property of the operation of the ragger (2), and adjusting the rate of travel of the ragger rope (4) and/or the operation of pulping on the basis of the measured property of the ragger rope (4) and/or effect caused by the ragger rope (4) on the ragger (2) and/or rate of travel of the ragger rope (4) and/or property (TM) of the ragger (2) operation.
Description
Technical field
The present invention relates to for the method in the processing of pulping process control screenings, this pulping process has for the preparation of the pulper of fibre pulp suspension with for the ragger (ragger) that removes screenings from pulper with twisted rope (ragger rope) form.
The invention still further relates to the equipment of processing at pulping process control screenings, this pulping process has for the preparation of the pulper of fibre pulp suspension with for the twisted rope device that removes screenings from pulper with the twisted rope form.
Background technology
In the initial step for the preparation of the fibre pulp suspension of making paper and cardboard for example, can adopt slurrying to be used as the part of technique.The purpose of slurrying is to make the fiber separation (defibrate) that supplies to the fibrous material in the pulper, and the water in making it and supplying to pulper mixes to form fibre pulp suspension.Usually, fibrous material for example can be cellulosic or regenerated fibre (recycled fibre) material, perhaps from the fibre of paper mill or paperboard mill.
When using the regenerated fibre material, a large amount of impurity (for example plastics and sheet metal, sand and glass) enter pulper with regenerated fibre usually.In the low concentration pulper, can use the twisted rope device to remove elongated plastic material and tinsel.The twisted rope device usually has draw roll (drawing roll) and presses to the pressure roller of this draw roll, pulls out pulper with twisted rope or screenings rope (reject rope) or by elongated plastic material, plastic film, tinsel and other rope that screenings material of mat has consisted of in pulper whereby.In order further to process twisted rope, the cutting machine that utilization is located at after the twisted rope device will be cut into by the twisted rope that the twisted rope device is pulled out from pulper suitable fragment.Disclosed the system relevant with slurrying among patent gazette US 2005/0115690 A1, US3844488 and the US 4592513, wherein twisted rope is used for removing impurity from this system.
Yet, for example fault of twisted rope interruption and so on often occurs in the twisted rope device.Thereby the interruption of twisted rope for example may increase too much at the thickness of twisted rope, and its weight occur when increasing equally too much, the amount of this moment and the screenings that is removed Comparatively speaking, the speed of twisted rope is excessively low.The interruption of twisted rope also may occur when twisted rope is thinner, in this case, twisted rope is applied pulling force may make its interruption.Occasionally, the fault of twisted rope device also is because the diameter of twisted rope increases too much, so that twisted rope is difficult to be removed or excessive the causing of size of pair twist rope device.
Now, the control of the operation of pair twist rope device is based on the control to the twisted rope speed of being set by user or operator.The speed of twisted rope can be by being used for monitoring the operation of twisted rope device camera or by the pair twist rope device inspect monitor.In fact these control methods of using at present can not react to the variation that occurs continuously in the starting material, this means that to remove the process of screenings from pulper disturbed.Insufficient fault that also causes belonging to secondary pulper and the screenings pump of pulping system that screenings removes, and cause than usually more strong pulp kneader rotor and the wearing and tearing of sieve plate.
Summary of the invention
The purpose of this invention is to provide novelty that screenings that a kind of control is the twisted rope form processes and Innovative method.
Method of the present invention is characterised in that, measures thickness (T) and/or length (L) and/or hardness and/or the elasticity of described twisted rope (4); And/or twisted rope vibrations or vibration (V) that the framed structure (11) of pair twist rope device is caused; And/or at least one attribute of the operation of the travel rate of twisted rope and/or twisted rope device, and based on the twisted rope that records thickness (T) and/or length (L) and/or hardness and/or elasticity, and/or the framed structure (11) of twisted rope pair twist the rope device vibrations or the vibration (V) that cause, and/or the attribute of the travel rate of twisted rope and/or twisted rope device operation, regulate the rotating speed of the travel rate of twisted rope and/or pulp kneader rotor and/or supply to the raw-material amount of the fibre pulp suspension of pulper.
Equipment of the present invention is characterised in that, this equipment comprises for thickness (T) and/or length (L) and/or hardness and/or the elasticity of measuring twisted rope; And/or the framed structure (11) of twisted rope pair twist the rope device vibrations or the vibration (V) that cause; And/or one or more measuring sensors of at least one attribute of the operation of the travel rate of twisted rope and/or twisted rope device, and this equipment comprises at least one control module, this control module is used for thickness (T) and/or length (L) and/or hardness and/or the elasticity based on the twisted rope that records, and/or the framed structure (11) of twisted rope pair twist the rope device vibrations or the vibration (V) that cause, and/or the operational attribute of the travel rate of twisted rope and/or twisted rope device is regulated the rotating speed of the travel rate of twisted rope and/or pulp kneader rotor and/or is supplied to the raw-material amount of the fibre pulp suspension in the pulper.
Be used for having for the preparation of the pulper of fibre pulp suspension with for the pulping process that removes the twisted rope device of screenings from this pulper with the twisted rope form, the travel rate of at least one attribute of the method measurement twisted rope that the control screenings is processed and/or at least one effect that twisted rope pair twist rope device causes and/or twisted rope and/or at least one attribute of twisted rope device operation, and the attribute of the operation of the travel rate of the effect that causes based on attribute and/or the twisted rope pair twist rope device of the twisted rope that records and/or twisted rope and/or twisted rope device, regulate the travel rate of twisted rope and/or the operation of slurrying.When regulating the slurrying operation, can regulate the rotating speed of pulp kneader rotor for example and/or be fed into the raw-material amount of the fibre pulp suspension of pulper.
According to this scheme, can consider raw-material impurity situation and control the travel rate of twisted rope or slurrying operation by simple, controlled mode.According to this scheme, can reduce the interruption of twisted rope, reduce thus from pulper removing screenings and the interference remaining operation of pulper section.Further, according to this scheme, can under the mode that can realize steadily and remove from pulper without barrier twisted rope, control the adjusting of the physical attribute of twisted rope, for example its diameter, weight and length.
According to an embodiment, measure the weight of twisted rope by measuring twisted rope being used on the twisted rope device.By measuring the effect of twisted rope on the twisted rope device, can record the compressive stress that twisted rope for example causes in the front portion of the framed structure of twisted rope device, the perhaps tension that causes at the rear portion of the framed structure of twisted rope device of twisted rope, thus, required surveying instrument is very simple and easily safeguard or replace.
Description of drawings
Described in more detail in the accompanying drawings some embodiments of the present invention, this accompanying drawing is that the schematic side of part section of the equipment of pulper, twisted rope, cutting machine and the operation that is used for control slurrying and twisted rope device represents.
In the accompanying drawings, for the purpose of clear, some embodiments of the present invention are simplified demonstration.
Embodiment
Accompanying drawing is the schematic side diagram of the part section of pulper 1, twisted rope device 2, cutting machine 3 and the device that is used for control twisted rope device 2.In pulper 1, utilize rotor (for not shown for the purpose of clear) to make the fibrous material fiber separation that supplies in the pulper, and mix with the water that supplies to pulper, to form fibre pulp suspension.Especially when using the regenerated fibre material, a large amount of impurity, for example plastic sheet and sheet metal, sand and glass enter pulper 1 with the regenerated fibre material.As the result that rotatablely move of paper pulp in pulper, elongated plastic material, plastic film and tinsel trend towards mat or attached to each other, therefore form twisted rope 4 or screenings rope 4 or restrict 4.Other screenings material, for example also attached or mat of sand or glass forms twisted rope 4 thus.This twisted rope 4 is supplied to twisted rope device 2 from pulper 1, and this twisted rope device 2 has by the draw roll 5 that is entirely motor 6 rotations that schematically illustrate.Twisted rope device 2 also usually comprises pressure roller 15, and pressure roller 16 presses to draw roll 5 and is used as the corresponding section of draw roll 5.The effect of twisted rope device 2 is that twisted rope 4 is pulled out from pulper 1, and prevents that thus the screenings material in the twisted rope from continuing to move ahead in pulping process.Be typically provided with cutting machine 3 after twisted rope device 2, twisted rope 4 is directed to cutting machine 3, and utilizes herein cutter 7 that twisted rope 4 is cut into sizeable.The sheet of twisted rope 4 and then leave cutting machine 3 by screenings outlet 8 is to be further processed.Because under high fibre pulp suspension concentration, the formation of twisted rope weakens or can not occur, so pulper 1 is generally the low concentration pulper, and the concentration that wherein is carried out the fibre pulp suspension of fiber separation is about 5% or less usually.Common structure and the principle of operation of the system that is made of pulper 1, twisted rope device 2 and cutting machine 3 are common general knowledge to those skilled in the art, therefore do not discussed in detail at this.
Accompanying drawing further illustrates the measurement mechanism 9 of the thickness T of measuring twisted rope 4, and it is set in order to vision monitoring twisted rope 4.Measurement mechanism 9 can comprise for software or other essential tool in the value of the thickness T of the vision monitoring basis of twisted rope 4 being determined twisted rope 4.Therefore measurement mechanism 9 consists of the measuring sensor that produces measuring-signal, can determine the thickness of twisted rope 4 on the basis of this measuring-signal.The one-tenth-value thickness 1/10 T of twisted rope 4 is sent to control module 10, the running by governor motor 6 or by regulating the rotating speed that to control the draw roll 5 of twisted rope device 2 by the frequency converter that control signal CS controls this motor running on the basis of this one-tenth-value thickness 1/10 of this control module 10, thereby and the travel rate of control twisted rope 4.As selection, measurement mechanism 9 can only be sent to control module 10 with the one or more measuring-signals that recorded, and on this basis, control module 10 and software thereof or other instrument can be determined the thickness T of twisted rope 4.
For example, the thickness measure of twisted rope can wherein be obtained the picture of twisted rope based on known computer vision sensor and related system, calculated thickness on the basis of the profile that twisted rope in the figure forms.The example of measuring another applicable scheme of twisted rope thickness is to use photoelectric tube (photocell), several photoelectric tubes can be settled side by side, to measure the degree of advancing of twisted rope shield light when measuring.This class is measured and certainly also can be carried out along two different directions, checks whereby twisted rope along the size of other direction.
Computer vision sensor and relevant system also can be used to measure the travel rate of twisted rope 4.For example, at the picture of specific interval acquiring, and determine this travel rate by the development of from continuous picture, measuring over a period to come picture or its details by relatively.Also can carry out on the basis of this measure setup the adjusting to the twisted rope travel rate.The rotating speed of the draw roll 5 of the travel rate of twisted rope and twisted rope device 2 is proportional, therefore, can determine the rotating speed (but not travel rate of twisted rope) of draw roll, this rotating speed can be considered to the attribute of the operation of twisted rope device 2, and example is measured such as the device that is used for the measurement rotating speed of being located in the motor 6.Except the travel rate of twisted rope device; usually also need to measure another amount; the attribute of twisted rope 4 for example; diameter (being thickness) such as twisted rope 4; the perhaps weight of twisted rope 4; in this case, when being transferred to control system, the common configuration example of these measurement results is such as the adjusting basis for the travel rate of regulating twisted rope 4.
Large or when increasing when the thickness T of twisted rope 4, can increase the rotating speed of the draw roll 5 of twisted rope device 2, and twisted rope 4 is increased from the speed that pulper 1 advances to twisted rope device 2, in order to twisted rope 4 is pulled out pulper 1 sooner, reduce thus the thickness of twisted rope 4, and excessive interruption of its weight that prevents that twisted rope 4 is excessive owing to its thickness and cause thus.If twisted rope 4 is thinner or become thinner, then the rotating speed of the draw roll 5 by slowing down twisted rope device 2 slows down the travel rate of twisted rope 4, thereby in order to obtain the thicker and more anti-twisted rope that draws 4, avoids thus twisted rope 4 to interrupt and the interference of screenings in removing.
The compressive stress measuring sensor 12 of the front portion (namely on pulper 1 side of this framed structure) of the framed structure 11 of being located at twisted rope device 2 further is shown in the accompanying drawing.This compressive stress measuring sensor 12 itself can be to measure member or comprise that one measures member, for example strainmeter or rated power device (power rating device), it is arranged to measure the front portion of the framed structure 11 of twisted rope 4 pair twist rope devices 2, the i.e. compression or the compressive stress that cause of pulper 1 one sides of this framed structure; Effect or stress represent the weight W of twisted rope 4.Because when twisted rope 4 advances to twisted rope device 2 from pulper 1, twisted rope 4 self is supported on the front portion or the part that is attached thereto of framed structure 11 of twisted rope device 2, so compression or compressive stress are caused in the front portion of the framed structure of twisted rope 4 pair twist rope devices 2.The weight of twisted rope 4 is larger, and is larger to the compression of framed structure 11 front portions of twisted rope 2.Compressive stress measuring sensor 12 can comprise the weight W of measuring twisted rope 4 and it is transferred to software or other essential tool of control module 10.Perhaps, the signal of the representative compression that compressive stress measuring sensor 12 can only will record is transferred to control module 10, control module 10 is determined the value of the weight W of twisted rope 4 on this basis, and the running by governor motor 6 or by regulating the rotating speed that can control by the frequency converter that control signal CS controls this motor running the draw roll 5 of twisted rope device 2, regulate thus twisted rope 4 advances to twisted rope device 2 from pulper 1 travel rate.
The measurement of tensile stress element 13 at the rear portion (i.e. the part of a side opposite with pulper 1) of the framed structure 11 of being located at twisted rope device 2 further is shown in the accompanying drawing.This measurement of tensile stress element 13 itself can be to measure member or comprise that one measures member, strainmeter for example, pulling force effect or the tension (it is representing the weight W of twisted rope 4) that cause at its rear portion that is configured to measure the framed structure 11 of twisted rope 4 pair twist rope devices 2.Because when twisted rope 4 advances to twisted rope device 2 from pulper 1, twisted rope 4 self is supported on the rear portion or the part that is attached thereto of framed structure 11 of twisted rope device 2, so action of pulling stress is caused at the rear portion of the framed structure of twisted rope 4 pair twist rope devices 2.The weight W of twisted rope 4 is larger, and the action of pulling stress at the rear portion of the framed structure 11 of pair twist rope device 2 is larger.Measurement of tensile stress element 13 can comprise the weight W of definite twisted rope 4 and it is transferred to software or other essential tool of control module 10.Perhaps, the signal of the representative action of pulling stress that measurement of tensile stress element 13 can only will record is transferred to control module 10, control module 10 is determined the value of the weight W of twisted rope 4 on this basis, and the running by governor motor 6 or by regulating the rotating speed that can control by the frequency converter that control signal CS controls this motor running the draw roll 5 of twisted rope device 2, regulate thus twisted rope 4 advances to twisted rope device 2 from pulper 1 travel rate.
Large or when increasing when the weight W of twisted rope 4, can increase the rotating speed of the draw roll 5 of twisted rope device 2, in order to twisted rope 4 is pulled out pulper 1 quickly, alleviate thus the weight of twisted rope 4 and the effect of pair twist rope device 2 thereof, and therefore prevent that twisted rope 4 from interrupting owing to its weight is excessive.If twisted rope 4 is light or become lighter, the rotating speed of the draw roll 5 of twisted rope device 2 can be slowed down, and then the travel rate of twisted rope 4 can be slowed down, in order to obtain heavier and the more anti-twisted rope that draws 4 thus, avoids thus twisted rope 4 to interrupt.
Also can by coming roller system, curved slab or the pipe of the function of weighing for twisted rope 4 to direct into twisted rope device 2 via being combined with some other measuring sensor that utilizes spring balance for example or suitable check weighing twisted rope 4, measure the weight of twisted rope.
A kind of mode of definite twisted rope is, the measurement of torsional moment of the draw roll 5 of pair twist rope device is set, and can calculate thus the weight of twisted rope.It also is considered to the attribute of twisted rope device operation torsional moment TM() can measure by the power of for example motor of measurement driving draw roll and by the torsional moment of calculating draw roll on the basis of motor power consumption.Torsional moment also can by between the draw roll that can be arranged on the twisted rope device and its drive unit, and schematically show in the drawings and measure with the torsional moment measurement mechanism of Reference numeral 16 expression.
The vibration survey element 14 of the front portion (namely on the part of pulper 1 side) of the framed structure 11 of being located at twisted rope device 2 further is shown in the accompanying drawing.Vibration survey element 14 itself can be to measure member or comprise that one measures member, acceleration sensor for example, vibrations or vibration V that its framed structure 11 of being arranged to measure twisted rope 4 pair twist rope devices 2 causes.The vibration that the framed structure 11 of twisted rope 4 pair twist rope devices causes is that the vibration owing to twisted rope 4 causes, and the vibration of twisted rope 4 then is owing to the rotor of twisted rope 4 near pulper 1 causes.More near the rotor of pulper 1, the vibrations of twisted rope are just stronger, and the vibration V that the framed structure 11 of twisted rope 4 pair twist rope devices 2 causes is stronger for twisted rope 4.Vibration survey element 14 can comprise for the value of determining representative vibration V and with it and is transferred to software or other essential tool of control module 10.Perhaps, the signal of the representative vibration that vibration survey element 14 can only will record is transferred to control module 10, control module 10 by the running of governor motor 6 or by regulating the rotating speed that can control by the frequency converter of control signal CS control motor running the draw roll 5 of twisted rope device 2, can be regulated twisted rope 4 advances to twisted rope device 2 from pulper 1 travel rate on this basis.
Strong or when strengthening when the vibration of the framed structure 11 of twisted rope device 2, increase the rotating speed of the draw roll 5 of twisted rope device 2, in order to twisted rope 4 pulled out pulper 1 quickly and thus more away from the rotor of pulper 1, thereby shorten the length of twisted rope 4 and avoid twisted rope 4 to interrupt.When if the vibration of the framed structure 11 of twisted rope device 2 is very light or small, can reduce the rotating speed of the draw roll 5 of twisted rope device 2, in order to promote the formation of twisted rope 4, and remove screenings from pulper 1 thus.
The length L of twisted rope 4 also is considered to the attribute of twisted rope 4.For example, can utilize the bottom that to be located at pulper 1 and the length L of determining twisted rope based on the linear measure longimetry element 17 of electric capacity, for example measure twisted rope 4 by the length of the bottom of pulper 1, and on the basis of this length, can regulate for example travel rate of twisted rope 4.Also can by the density p of weight W, mean diameter D and twisted rope 4, utilize following formula to determine the length L of twisted rope 4
Wherein, for example the weight W of twisted rope 4 can be determined by said method, and mean diameter D can determine in the Fundamentals of Measurement of the thickness T of twisted rope 4 mentioned above.The density value of the twisted rope of the approximately uniform diameter that removes from pulper not long ago is used as the density value ρ of twisted rope 4.Can also stipulate one or more coefficients (rather than density value) with empirical data according to the diameter of twisted rope, in this case, by with twisted rope weight square with merchant and this multiplication of diameter, can determine the length of twisted rope 4.
In order to determine the travel rate of twisted rope, measure rigidity or elasticity or both combinations as the twisted rope of its attribute.Embodiment for example can comprise pusher, wherein point to twisted rope along the power of laterally effect, and skew, bending or the deflection of measuring the twisted rope that is caused by this power, and on the basis of the combination of measurement result or measurement result, by control system so that the unbroken mode of twisted rope is set the operation of travel rate or the pulper of twisted rope.The skew that causes when transverse force or crooked hour, control system can be set for and think that twisted rope has rigidity, and be the high travel rate of twisted rope setting.Correspondingly, when the skew that causes when transverse force or bending are larger, control system can be set for and think that twisted rope has elasticity, and be that twisted rope is set low travel rate.Further, the twisted rope flexing is larger if the twisted rope lateral excursion that systematic survey arrives is less, in the case, pusher promotes twisted rope and then it only can be become to regulate high twisted rope travel rate or low twisted rope travel rate with default according to the material of processing in the pulper laterally relative to moving slightly in the edge.Propose be used for to measure twisted rope rigidity, bending or flexible measurement mechanism based on pusher can be configured to for example carry out at pressure roller 15 places, or be configured to independent measurement mechanism.
For example, can be by the running of controlling motor 18 or the rotating speed of controlling the rotor of pulper 1 by the frequency converter of controlling the running of motor 18 by control signal CS ', to regulate the slurrying operation.The rotating speed of the rotor by changing pulper 1 can affect the growth rate of twisted rope 4.The amount that slurrying operation also can supply to starting material in the pulper 1 by adjusting, namely be generally the regenerated fibre material is controlled.This can be by for example control signal CS " control conveyor 19 in the mode that can regulate the raw-material amount that supplies to pulper 1 and supply with raw-material speed to pulper 1, perhaps control operation from raw-material some other device to pulper 1 that supply with and finish.By regulating raw material supply to the amount of pulper 1, can affect the amount that enters the screenings of pulper with starting material, and therefore affect the formation intensity of twisted rope.
The measuring sensor that proposes in this instructions is all shown in the same accompanying drawing.Yet, obviously can in this programme, only use one of them of above-mentioned measurement mechanism, one of them of the measurement mechanism of perhaps mentioning in this instructions or some other measurement mechanism perhaps use some other corresponding measurement mechanism in this programme with one or more above-mentioned measurement mechanisms or some other corresponding measurement mechanism.
At least one attribute of twisted rope 4 by measuring twisted rope device 2 and/or at least one effect and/or the travel rate of twisted rope and/or the operational attribute of twisted rope device that twisted rope 4 pair twist rope devices 2 cause, and the travel rate by regulating twisted rope or the operation of pulper on the basis of this measurement, twisted rope 4 is removed from pulper 1 in a controlled manner, perhaps during the vibration of the impurity in considering starting material, can affect twisted rope 4 and form at pulper, thereby and also affect screenings and process.This scheme can limit for example thickness, weight and/or the length of twisted rope 4, perhaps the variation of described attribute is remained less, and by Change Example as twisted rope 4 remove speed regulate as described in attribute.By this scheme, can reduce or avoid fully the interruption of twisted rope 4, can reduce in addition the variation of thickness, weight and the length of twisted rope, reduce thus when removing screenings from pulper interference and so that screenings become steadily and controlled from removing of pulper.When suffered interference was less when removing screenings from pulper, the interference of different step that is positioned at the pulping process after the pulper was less, and thus, this scheme provides effect reduce disturbance, multiplication in the operation in all the other zones of pulper.
In some cases, the disclosed feature of the application can be like this and further feature irrespectively use.On the other hand, if necessary, the also different combination of formation capable of being combined of the disclosed feature of the application.Therefore, process for the control screenings, can only can measure or regulate based on the amount that several whiles can survey based on one.In addition, can be by the travel rate of control effect twisted rope or by only controlling the operation of pulper, or adjusting is carried out in the travel rate by regulating simultaneously twisted rope and the operation of pulper.
Accompanying drawing only is intended to illustrate design of the present invention with relevant description.Within the scope of the claims, the present invention can make a change in detail.Therefore, according to the solution of the present invention, when at least one attribute of the twisted rope 4 of measuring twisted rope device 2, can measure at least one in the lower Column Properties: the rigidity of the weight N of the thickness T of twisted rope 4, twisted rope 4, the length L of twisted rope 4, twisted rope 4, the elasticity of twisted rope 4.Further, do the time spent when at least one that measure that twisted rope 4 pair twist rope devices 2 cause, can measure in the following attribute at least one: concussion or vibration that the tension that the rear portion of the framed structure 11 of the compressive stress that the front portion of the framed structure 11 of twisted rope 4 pair twist rope devices 2 applies, twisted rope 4 pair twist rope devices applies, twisted rope 4 pair twist rope devices 2 cause.
Claims (8)
1. one kind is used for controlling the method that screenings is processed at pulping process, described pulping process has the pulper (1) for the preparation of fibre pulp suspension and is used for removing with twisted rope (4) form from described pulper (1) the twisted rope device (2) of screenings, it is characterized in that:
Measure thickness (T) and/or length (L) and/or hardness and/or the elasticity of described twisted rope (4); And/or described twisted rope (4) vibrations or vibration (V) that the framed structure (11) of described twisted rope device (2) is caused; And/or at least one attribute of the operation of described twisted rope device (2), and
Thickness (T) and/or length (L) and/or hardness and/or elasticity based on the twisted rope that records (4), and/or described twisted rope (4) vibrations or vibration (V) that the framed structure (11) of described twisted rope device (2) is caused, and/or the attribute of the operation of described twisted rope device (2), regulate the travel rate of described twisted rope (4) and/or described pulper (1) rotor rotating speed and/or supply to the raw-material amount of the fibre pulp suspension of described pulper (1).
2. the method for claim 1 is characterized in that, when measuring at least one attribute of described twisted rope device (2) operation, measures the torsional moment (TM) of the draw roll (5) of described twisted rope device (2).
3. the method for claim 1, it is characterized in that, when described twisted rope (4) was thinner, the vibration (V) that perhaps framed structure (11) of described twisted rope device (2) is caused when described twisted rope (4) hour reduced the travel rate of described twisted rope (4).
4. the method for claim 1, it is characterized in that, when described twisted rope (4) is thicker, when the vibration (V) that perhaps framed structure (11) of described twisted rope device (2) is caused when described twisted rope (4) is stronger, improve the travel rate of described twisted rope (4).
5. be used for the equipment in the processing of pulping process control screenings, described equipment has the pulper (1) for the preparation of fibre pulp suspension and is used for removing with twisted rope (4) form from described pulper (1) the twisted rope device (2) of screenings, it is characterized in that:
Described equipment comprises one or more measuring sensors (9,12,13,14,16), and described measuring sensor is used for measuring thickness (T) and/or length (L) and/or hardness and/or the elasticity of described twisted rope (4); And/or described twisted rope (4) vibrations or vibration (V) that the framed structure (11) of described twisted rope device (2) is caused; And/or at least one attribute (TM) of the operation of described twisted rope device (2), and
Described equipment comprises at least one control module (10), described control module is used for thickness (T) and/or length (L) and/or hardness and/or the elasticity based on the twisted rope that records (4), and/or described twisted rope (4) vibrations or vibration (V) that the framed structure (11) of described twisted rope device (2) is caused, and/or the attribute of the operation of described twisted rope device (2), regulate the travel rate of described twisted rope (4) and/or described pulper (1) rotor rotating speed and/or supply to the raw-material amount of the fibre pulp suspension of described pulper (1).
6. equipment as claimed in claim 5 is characterized in that, is arranged for measuring the torsional moment (TM) of the draw roll (5) of described twisted rope device (2) in order to the described measuring sensor (16) of the operational attribute of measuring described twisted rope device (2).
7. equipment as claimed in claim 5, it is characterized in that, described control module (10) be arranged for when described twisted rope (4) is thinner or the vibration (V) that the framed structure (11) of described twisted rope device (2) caused when described twisted rope (4) hour, reduce the travel rate of described twisted rope (4).
8. equipment as claimed in claim 5, it is characterized in that, described control module (10) is arranged for when described twisted rope (4) is thicker or the vibration (V) that the framed structure of described twisted rope device (2) caused when described twisted rope (4) when stronger, improves the travel rate of described twisted rope (4).
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FI20080507 | 2008-09-05 | ||
| FI20080507A FI120710B (en) | 2008-09-05 | 2008-09-05 | Procedure and apparatus for controlling reject processing in pulp manufacturing process |
| PCT/FI2009/050706 WO2010026295A1 (en) | 2008-09-05 | 2009-09-03 | Method and equipment for controlling reject handling in pulping process |
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| Publication Number | Publication Date |
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| CN102144149A CN102144149A (en) | 2011-08-03 |
| CN102144149B true CN102144149B (en) | 2013-03-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2009801349464A Active CN102144149B (en) | 2008-09-05 | 2009-09-03 | Method and equipment for controlling reject handling in pulping process |
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| Country | Link |
|---|---|
| CN (1) | CN102144149B (en) |
| AT (1) | AT509144B1 (en) |
| DE (1) | DE112009002115B4 (en) |
| FI (1) | FI120710B (en) |
| WO (1) | WO2010026295A1 (en) |
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| DE102010043603A1 (en) | 2010-11-09 | 2012-05-10 | Voith Patent Gmbh | Zopfwindensteuerung |
| CN102645291B (en) * | 2012-05-04 | 2013-10-30 | 山东省环科院环境工程有限公司 | Fault predication and warning method and device for underwater mixing and impelling devices |
| CN104846677B (en) * | 2015-05-26 | 2017-01-04 | 浙江康诚工业产品设计有限公司 | A kind of pulp production device |
| DE102016101712B4 (en) | 2016-02-01 | 2018-08-16 | Meri Environmental Solutions Gmbh | Apparatus and method for processing a braid formed in a pulper |
| CN106217427B (en) * | 2016-07-12 | 2018-10-26 | 玖龙纸业（太仓）有限公司 | A kind of the twisted rope cutter device and twisted rope cutting method of pulper |
| CN106283785B (en) * | 2016-09-18 | 2018-01-12 | 安德里茨（中国）有限公司 | Rotary drum pulping machine |
| CN107724148B (en) * | 2017-11-16 | 2019-11-19 | 浙江华宇纸业有限公司 | A kind of papermaking pulping system |
| CN108691228B (en) * | 2018-05-18 | 2023-08-04 | 玖龙纸业（泉州）有限公司 | Heavy slag collecting system and collecting method |
| FI20206159A1 (en) * | 2020-11-16 | 2022-05-17 | Valmet Technologies Oy | Ragger |
| CN116829784A (en) * | 2021-02-12 | 2023-09-29 | 凯登百利可乐生有限公司 | Rope winch system and method for removing solid debris from a pulping process |
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- 2009-09-03 WO PCT/FI2009/050706 patent/WO2010026295A1/en active Application Filing
- 2009-09-03 CN CN2009801349464A patent/CN102144149B/en active Active
- 2009-09-03 DE DE112009002115.8T patent/DE112009002115B4/en active Active
- 2009-09-03 AT ATA9326/2009A patent/AT509144B1/en active
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Also Published As
| Publication number | Publication date |
|---|---|
| CN102144149A (en) | 2011-08-03 |
| FI20080507A0 (en) | 2008-09-05 |
| DE112009002115T5 (en) | 2011-07-07 |
| AT509144A2 (en) | 2011-06-15 |
| DE112009002115B4 (en) | 2018-01-04 |
| AT509144A3 (en) | 2012-12-15 |
| FI120710B (en) | 2010-01-29 |
| AT509144B1 (en) | 2013-02-15 |
| WO2010026295A1 (en) | 2010-03-11 |
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