CN114277600A - Safe operation control method for pulping machine - Google Patents
Safe operation control method for pulping machine Download PDFInfo
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- CN114277600A CN114277600A CN202111580818.1A CN202111580818A CN114277600A CN 114277600 A CN114277600 A CN 114277600A CN 202111580818 A CN202111580818 A CN 202111580818A CN 114277600 A CN114277600 A CN 114277600A
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- 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
Abstract
The invention discloses a safe operation control method of a pulping machine, wherein the pulping machine comprises a fixed cutter, a movable cutter, a moving mechanism for driving the movable cutter to move and a rotating mechanism for driving the movable cutter to rotate, and the method comprises the following steps: after the pulping machine is installed, the moving cutter is driven by the moving mechanism to be in contact with the fixed cutter, and the position of the moving cutter at the moment is determined to be an initial zero position; determining that an adjustment zero position is located at the initial zero position; the moving knife is driven to retract by the moving mechanism at least to a knife retracting position, and the knife retracting position is at least 6mm away from the adjustment zero position; and the rotating mechanism is utilized to drive the movable knife to rotate. By additionally arranging position control, the pulp grinding quality is really ensured by stabilizing the gap between the movable cutter and the fixed cutter. The problem that the constant clearance cannot be ensured due to the fact that power feedback is influenced by factors such as flow, concentration and pressure of slurry in a traditional control mode such as power is solved.
Description
Technical Field
The invention relates to the technical field of refiners, in particular to a safe operation control method for a refiner.
Background
With the emphasis of the nation on intelligent manufacturing, low-energy consumption and high-intelligence low-carbon environment-friendly equipment is developed to save the labor cost in the actual production process, improve the production efficiency and reduce the average production energy consumption.
Refiners are essential equipment used in stock preparation plants of paper mills. The pulp fiber passes through the rotor which rotates fast to generate centrifugal action and enters a pulping area which consists of the rotor and the stator, the surfaces of the rotor and the stator are provided with strip-shaped blades, and the fiber moves from the groove of the rotor to the groove of the stator through the clearance of the pulping area. The fiber passes through the gap, and thus, the fiber is cut, pressed, broomed, or fluffed, thereby changing the fiber properties.
Whether the gap between the refining blades remains stable is a determining factor in determining the effect of the fibre treatment. The pulping machine comprises a movable cutter and a fixed cutter, the motor drives the movable cutter to rotate, and the required pulping clearance is realized by realizing the feed through a feed and retreat cutter mechanism. The power of the feed process can be increased, and the motor power or the current value reflected by the approximate sharpening gap is adopted as a parameter to realize control.
In chinese patent application No.: CN201711372781.7 discloses an automatic control system and method for feeding and retracting of a double-disc refiner, which discloses "stopping feeding when the actual power of the main motor collected by a power transmitter is equal to the set power".
The article "control of refiner consistency" describes "refiner constant power control". The linking is as follows:https://www.docin.com/p-831395945.html。
the actual power feedback of the motor adopted by the power control mode is compared with the set power to realize the control of the expected refining gap.
The applicant has found that the actual feedback power does not represent that factors such as actual refining gap, consistency, flow, pressure difference etc. all affect the actual power feedback. After the factors change, the power changes, and the knife sharpening gap to be achieved by the originally set power value changes, so that the precise knife sharpening gap target cannot be achieved by the knife sharpening action during power control. The grinding quality is changed due to unstable grinding clearance, and the grinding tool is easy to collide. In view of this, the present application is proposed.
Disclosure of Invention
In order to solve at least one technical problem in the background art, the invention provides a safe operation control method of a pulping machine, which avoids cutter collision and is safe to operate.
The invention provides a safe operation control method of a pulping machine, the pulping machine comprises a fixed knife, a movable knife, a moving mechanism for driving the movable knife to move and a rotating mechanism for driving the movable knife to rotate, the method comprises the following steps:
after the pulping machine is installed, the moving cutter is driven by the moving mechanism to be in contact with the fixed cutter, and the position of the moving cutter at the moment is determined to be an initial zero position;
determining that an adjustment zero position is located at the initial zero position;
the moving knife is driven to retract by the moving mechanism at least to a knife retracting position, and the knife retracting position is at least 6mm away from the adjustment zero position;
the rotating mechanism is used for driving the movable knife to rotate;
the moving knife is driven to feed by the moving mechanism;
when the actual power P is less than or equal to PS and is less than or equal to 0.99PS, or the moving blade is fed to the position in front of the pulping area from the tool withdrawal position, stopping feeding; wherein the content of the first and second substances,
the PS is the preset power of the rotating mechanism;
the front position of the beating area is positioned between the zero adjustment position and the cutter withdrawal position and is 0.16-0.24mm away from the zero adjustment position.
Preferably, the method comprises: and when the movable cutter is positioned in the front position of the beating area and the actual power P is less than 0.97PS, adjusting the zero adjustment position by 0.08-0.12mm towards the direction of the fixed cutter.
Preferably, the method comprises: and the zero point adjusting position is adjusted by 0.1mm towards the fixed cutter direction every time.
Preferably, the method comprises: and when the distance between the adjustment zero position and the initial zero position is larger than a preset value, reminding.
Preferably, the method comprises: when the moving blade feeds from the retracting position to the back position of the beating area, the moving mechanism controls the moving blade to feed in a pulse inching manner to the front position of the beating area; wherein, the back position of the beating area is positioned between the front position of the beating area and the cutter withdrawing position and is 0.3-0.5mm away from the zero adjustment position.
Preferably, the method comprises: and the distance between the back position of the beating area and the zero adjustment position is 0.4 mm.
Preferably, the method comprises: when the movable cutter is fed to the rear position of the pulping area, the moving mechanism controls the movable cutter to feed 0.05mm each time, and then whether the movable cutter is fed to the front position of the pulping area is judged, or the actual power P is not less than 0.99PS and not more than PS;
if so, stopping feeding;
if not, continuing to feed for 0.05mm each time.
Preferably, the method comprises: when the moving blade is fed from the tool retracting position to the fast and slow switching position, the moving mechanism controls the moving blade to be switched from fast feeding to slow feeding; and the fast and slow switching position is positioned between the front position of the pulping area and the cutter withdrawing position and is 1.6-2.2mm away from the adjustment zero position.
Preferably, the distance between the tool retracting position and the adjustment zero point position is 6-10 mm.
An electronic device, the electronic device comprising: one or more processors;
a memory for storing one or more programs;
when executed by the one or more processors, cause the one or more processors to implement any of the methods described herein.
The beneficial effects brought by one aspect of the invention are as follows:
by additionally arranging position control, the pulp grinding quality is really ensured by stabilizing the gap between the movable cutter and the fixed cutter. The problem that the constant clearance cannot be ensured due to the fact that power feedback is influenced by factors such as flow, concentration and pressure of slurry in a traditional control mode such as power is solved.
Drawings
FIG. 1 is a flow chart of the present disclosure.
Detailed Description
It should be noted that, in the case of no conflict, the embodiments and features in the embodiments in the present application may be combined with each other; the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left" and "right", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the positions or elements referred to must have specific orientations, be constructed in specific orientations, and be operated, and thus are not to be construed as limitations of the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Referring to fig. 1, the present invention provides a method for controlling the safe operation of a refiner, the refiner includes a stationary knife, a movable knife, a moving mechanism for driving the movable knife to move, and a rotating mechanism for driving the movable knife to rotate, the method includes:
step S1: after the pulping machine is installed, the moving cutter is driven by the moving mechanism to be in contact with the fixed cutter, and the position of the moving cutter at the moment is determined to be an initial zero position.
Step S2: and determining that the adjustment zero point position is located at the initial zero point position.
Step S3: and the moving mechanism is utilized to drive the moving cutter to retract at least to a cutter retracting position, and the cutter retracting position is at least 6mm away from the adjustment zero position.
Step S4: and the rotating mechanism is utilized to drive the movable knife to rotate.
Step S5: the moving knife is driven to feed by the moving mechanism;
step S6: when the actual power P is less than or equal to PS and is less than or equal to 0.99PS, or the moving blade is fed to the position in front of the pulping area from the tool withdrawal position, stopping feeding; wherein the content of the first and second substances,
the front position of the beating area is located between the zero adjustment position and the cutter withdrawal position, and is 0.16-0.24mm away from the zero adjustment position, and is 0.2mm in the embodiment. The PS is the preset power of the rotating mechanism.
The position of the moving blade can be detected in real time by using the position sensor. The control can be performed by using a DCS system. The position sensor transmits the detected data to the DCS system. The DCS system controls the movement of the moving mechanism and the rotating mechanism.
The present embodiment performs control by using power and position matching interlock, and when the actual power P is greater than or equal to 0.99PS and less than or equal to PS, the feeding needs to be stopped in such a situation. When the moving blade moves to the front position of the beating area, the feeding needs to be stopped no matter what the actual power P is. Therefore, the movable knife can be safely protected from being collided.
Further, the method further comprises: when the movable knife is positioned at the front position of the beating area and the actual power P is less than 0.97PS, the zero adjustment position is adjusted to 0.08-0.12mm, which can be 0.08, 0.09, 0.1, 0.11 or 0.12mm, towards the direction of the fixed knife. This embodiment may be 0.1 mm.
Further, the method further comprises: and when the distance between the adjustment zero position and the initial zero position is larger than a preset value, reminding. After the reminding is carried out, the paper pulp can be stopped from being introduced, and the moving mechanism controls the moving cutter to retract at least to the cutter retracting position and stops; the rotating mechanism is stopped.
Further, the method further comprises: when the moving blade feeds from the retracting position to the back position of the beating area, the moving mechanism controls the moving blade to feed in a pulse inching manner to the front position of the beating area; wherein, the back position of the beating area is located between the front position of the beating area and the cutter withdrawing position, and is 0.3-0.5mm away from the zero adjustment position, which is 0.4mm in this embodiment.
Further, the method further comprises: when the movable cutter is fed to the rear position of the pulping area, the moving mechanism controls the movable cutter to feed 0.05mm each time, and then whether the movable cutter is fed to the front position of the pulping area is judged, or the actual power P is not less than 0.99PS and not more than PS;
if so, stopping feeding; if not, continuing to feed for 0.05mm each time.
Further, the method further comprises: when the moving blade is fed from the tool retracting position to the fast and slow switching position, the moving mechanism controls the moving blade to be switched from fast feeding to slow feeding; the fast and slow switching position is located between the position before the beating area and the cutter retracting position, and is 1.6-2.2mm away from the adjustment zero position, and the distance is 2mm in the embodiment.
Further, the distance between the tool retracting position and the adjustment zero point position is 6-10mm, and the distance is 8mm in the embodiment. The distance is safe, and stroke waste is avoided.
After the new pulping machine is installed, debugging is carried out, the movable cutter is contacted with the fixed cutter, and at the moment, the position of the movable cutter is determined to be an initial zero position. Assume that the position sensor reads 20.13 mm.
Meanwhile, the initial adjustment zero point position is determined to be the initial zero point position. At this time, the adjustment zero position corresponds to a reading of 20.13mm of the position sensor.
After debugging, the moving knife is driven to retract by the moving mechanism at least to the position of retracting the knife. In this embodiment, the distance between the tool retracting position and the zero adjustment position is 8 mm. Thus, the retract position corresponds to a 12.13mm reading of the position sensor.
In the embodiment, the moving knife retreating distance can be far away and exceeds the retreating position. In one embodiment, the reading of the corresponding position sensor after the moving blade push knife is 12.11 mm.
During operation, pulp is introduced. When the movable knife is determined not to exceed the knife withdrawing position, the DCS controls the moving mechanism to drive the movable knife to feed fast, and controls the rotating mechanism to drive the movable knife to rotate.
When the moving knife moves to the fast and slow switching position, the moving mechanism controls the moving knife to be switched from fast feeding to slow feeding. The fast feed and the slow feed in this embodiment refer to different feed speeds, and there is no specific value of the speed.
When the cutter is fed to the rear position of the pulping area, the moving mechanism controls the moving cutter to perform pulse inching to feed the cutter to the front position of the pulping area. When the moving knife is positioned at the rear position of the beating area, the knife needs to be fed carefully, and the pulse inching feeding can be carried out by feeding for 0.05mm each time. After each time of feed, judging whether the cutter moves to the position before the beating area, wherein the actual power P is more than or equal to 0.99PS and less than or equal to PS. When the moving blade moves to the front position of the beating area, or the actual power P is not less than 0.99PS and not more than PS, the feeding is stopped.
Through a plurality of experiments, the actual power P of the rotating mechanism is basically 0.99 PS-PS when the movable knife is positioned in the front position of the beating area. So controlled that a constant refining knife gap is guaranteed.
In the prior art, the actual power P is compared with PS so as to control the moving blade. In actual conditions, the actual power P may not reach 0.99 × PS even if the moving blade collides with the stationary blade due to a decrease in the pulp flow rate or the like. In the prior art, power control is always adopted, and a person skilled in the art does not know why the power control causes cutter collision and the refining effect is not ideal and does not know the reason. And this application is through power control, position control cooperation, through the position restriction, can in time move back the sword. The movable cutter can be adjusted in time, the constant pulping clearance is ensured, and the condition can be effectively avoided.
When the actual power P is greater than the PS; or when the moving blade is fed to the limit position, the moving mechanism controls the moving blade to retract at least to the retracting position; wherein the content of the first and second substances,
the limit position is located between the zero adjustment position and the tool retracting position, and the limit position is 0.08-0.12mm away from the zero adjustment position, and may be 0.08, 0.09, 0.1, 0.11, 0.12 mm.
The thickness of the present embodiment may be 0.1mm
When the moving blade stops at the front position of the beating area, if an abnormality occurs, such as the pulp concentration is increased, the actual power P is also increased, and when the actual power P is greater than PS, the blade withdrawing treatment is required. When the pulp concentration decreases or the pulp flow rate suddenly decreases. The pressure of the pulp on the movable cutter is reduced, and then the movable cutter can feed a small distance towards the direction of the fixed cutter due to the installation gap of the pulp grinder. However, when the movable blade is in the front position of the beating area, the distance between the movable blade and the fixed blade is originally small, and if the above situation occurs, the blade collision is easily caused. Conventionally, there is no way to avoid such a situation by means of power control.
By setting the limit position, the moving knife is driven to rapidly withdraw by the moving mechanism as long as the moving knife is fed to the limit position, so that knife collision is avoided. And the position control is additionally arranged, so that the accurate clearance control of the movable cutter and the fixed cutter is ensured.
The position control is also carried out on the limit position, the position before the pulping area, the position after the pulping area and the cutter withdrawal position, the moving cutter operation is flexibly adjusted, the pulping effect is ensured, and the safety accident is avoided.
Along with the abrasion of the movable knife, the embodiment can also effectively carry out compensation adjustment.
When the movable cutter is positioned in the front position of the beating area, if the actual power P is always less than 0.97 PS. Therefore, the movable knife is judged to be worn and needs to be adjusted. The zero adjustment point position is adjusted toward the fixed cutter by 0.1mm each time. At this time, the adjustment zero point position was not at the initial zero point position, but was 0.1mm from the initial zero point position. Correspondingly, the limit position, the front position of the beating area, the rear position of the beating area and the cutter withdrawal position are correspondingly adjusted, and the distance between adjacent parts is ensured.
If the moving blade is found to be positioned in front of the beating area again, and the actual power P is always less than 0.97PS, then the adjustment is carried out again. Thus, the grinding quality can be effectively ensured.
Of course, when the distance between the adjustment zero point position and the initial zero point position is greater than a preset value, a prompt is required. At this time, the moving blade is seriously worn and needs to be replaced.
For example, after a period of use, the adjusted zero position corresponds to a reading of 55.50 mm. Correspondingly, the reading corresponding to the limit position is 55.40mm, the reading corresponding to the front position of the beating area is 55.30mm, the reading corresponding to the rear position of the beating area is 55.10mm, and the reading corresponding to the fast and slow switching position is 53.5 mm. The moving knife is positioned in the front position of the beating area and the corresponding reading is 55.30 mm.
The adjustment zero point position is adjusted by an amount of 55.50-20.13-35.37 mm relative to the initial zero point position. I.e. the wear of the moving blade is 35.37 mm. If the preset value is 35.37 mm. When the reading corresponding to the zero position is adjusted to be 55.50, if the actual power P of the movable knife at the back position of the beating area is always less than 0.97PS, a prompt is required at the moment, the movable knife is seriously worn and needs to be replaced.
In the embodiment, the pulp grinding quality is really ensured by stabilizing the gap between the movable cutter and the fixed cutter by additionally arranging the position control. The problem that the constant clearance cannot be ensured due to the fact that power feedback is influenced by factors such as flow, concentration and pressure of slurry in a traditional control mode such as power is solved.
Meanwhile, the problems of rapid abrasion and the like caused by contact of the movable cutter and the fixed cutter in the operation process can be effectively avoided due to position control, the service lives of the movable cutter and the fixed cutter are fundamentally prolonged, the cost investment of a wearing part is reduced, the life cycle of the wearing part is prompted, and the planned shutdown of a factory is facilitated.
Another embodiment also discloses an electronic device, including: one or more processors;
a memory for storing one or more programs;
when executed by the one or more processors, cause the one or more processors to implement any of the methods described herein.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (10)
1. A safe operation control method of a pulping machine, the pulping machine comprises a fixed knife, a movable knife, a moving mechanism for driving the movable knife to move and a rotating mechanism for driving the movable knife to rotate, and is characterized in that the method comprises the following steps:
after the pulping machine is installed, the moving cutter is driven by the moving mechanism to be in contact with the fixed cutter, and the position of the moving cutter at the moment is determined to be an initial zero position;
determining that an adjustment zero position is located at the initial zero position;
the moving knife is driven to retract by the moving mechanism at least to a knife retracting position, and the knife retracting position is at least 6mm away from the adjustment zero position;
the rotating mechanism is used for driving the movable knife to rotate;
the moving knife is driven to feed by the moving mechanism;
when the actual power P is less than or equal to PS and is less than or equal to 0.99PS, or the moving blade is fed to the position in front of the pulping area from the tool withdrawal position, stopping feeding; wherein the content of the first and second substances,
the PS is the preset power of the rotating mechanism;
the front position of the beating area is positioned between the zero adjustment position and the cutter withdrawal position and is 0.16-0.24mm away from the zero adjustment position.
2. The method of claim 1, characterized in that the method comprises: and when the movable cutter is positioned in the front position of the beating area and the actual power P is less than 0.97PS, adjusting the zero adjustment position by 0.08-0.12mm towards the direction of the fixed cutter.
3. A method according to claim 2, characterized in that the method comprises: and the zero point adjusting position is adjusted by 0.1mm towards the fixed cutter direction every time.
4. A method according to claim 2, characterized in that the method comprises: and when the distance between the adjustment zero position and the initial zero position is larger than a preset value, reminding.
5. A method according to claim 2, characterized in that the method comprises: when the moving blade feeds from the retracting position to the back position of the beating area, the moving mechanism controls the moving blade to feed in a pulse inching manner to the front position of the beating area; wherein, the back position of the beating area is positioned between the front position of the beating area and the cutter withdrawing position and is 0.3-0.5mm away from the zero adjustment position.
6. The method of claim 5, wherein the method comprises: and the distance between the back position of the beating area and the zero adjustment position is 0.4 mm.
7. The method of claim 5, wherein the method comprises: when the movable cutter is fed to the rear position of the pulping area, the moving mechanism controls the movable cutter to feed 0.05mm each time, and then whether the movable cutter is fed to the front position of the pulping area is judged, or the actual power P is not less than 0.99PS and not more than PS;
if so, stopping feeding;
if not, continuing to feed for 0.05mm each time.
8. The method of claim 1, characterized in that the method comprises: when the moving blade is fed from the tool retracting position to the fast and slow switching position, the moving mechanism controls the moving blade to be switched from fast feeding to slow feeding; and the fast and slow switching position is positioned between the front position of the pulping area and the cutter withdrawing position and is 1.6-2.2mm away from the adjustment zero position.
9. The method of claim 1, wherein the retract position is 6-10mm from the adjustment zero position.
10. An electronic device, characterized in that the electronic device comprises: one or more processors;
a memory for storing one or more programs;
when executed by the one or more processors, cause the one or more processors to implement the method of any one of claims 1-9.
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| CN202111580818.1A CN114277600B (en) | 2021-12-22 | 2021-12-22 | Safe operation control method of pulping machine |
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| CN202111580818.1A CN114277600B (en) | 2021-12-22 | 2021-12-22 | Safe operation control method of pulping machine |
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|---|---|---|---|---|
| GB425644A (en) * | 1933-11-09 | 1935-03-19 | Joseph Edwards Bond | Improvements in or relating to paper making |
| FR1060677A (en) * | 1952-07-30 | 1954-04-05 | Neyret Beylier Atel | Further training in pulp refining equipment |
| JPS6128095A (en) * | 1984-07-17 | 1986-02-07 | 三菱重工業株式会社 | Refiner control apparatus |
| CN2097847U (en) * | 1991-08-20 | 1992-03-04 | 陈肇嘉 | Double-knife starch-grinding machine |
| JP2003112069A (en) * | 2001-10-09 | 2003-04-15 | Mitsubishi Paper Mills Ltd | Method of controlling double disk refiner |
| CN102828432A (en) * | 2012-08-13 | 2012-12-19 | 李�昊 | Batch refiner and refining process thereof |
| CN107974857A (en) * | 2017-12-19 | 2018-05-01 | 郑州运达造纸设备有限公司 | A kind of double disc refiner is into withdrawing automatic control system and method |
| CN207659782U (en) * | 2017-12-19 | 2018-07-27 | 郑州运达造纸设备有限公司 | A kind of double disc refiner is into withdrawing automatic control system |
| CN110093801A (en) * | 2019-04-24 | 2019-08-06 | 华南理工大学 | A kind of machine, liquid linkage adjust the conical refiner of forward and back knife and defibrination than pressure |
-
2021
- 2021-12-22 CN CN202111580818.1A patent/CN114277600B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB425644A (en) * | 1933-11-09 | 1935-03-19 | Joseph Edwards Bond | Improvements in or relating to paper making |
| FR1060677A (en) * | 1952-07-30 | 1954-04-05 | Neyret Beylier Atel | Further training in pulp refining equipment |
| JPS6128095A (en) * | 1984-07-17 | 1986-02-07 | 三菱重工業株式会社 | Refiner control apparatus |
| CN2097847U (en) * | 1991-08-20 | 1992-03-04 | 陈肇嘉 | Double-knife starch-grinding machine |
| JP2003112069A (en) * | 2001-10-09 | 2003-04-15 | Mitsubishi Paper Mills Ltd | Method of controlling double disk refiner |
| CN102828432A (en) * | 2012-08-13 | 2012-12-19 | 李�昊 | Batch refiner and refining process thereof |
| CN107974857A (en) * | 2017-12-19 | 2018-05-01 | 郑州运达造纸设备有限公司 | A kind of double disc refiner is into withdrawing automatic control system and method |
| CN207659782U (en) * | 2017-12-19 | 2018-07-27 | 郑州运达造纸设备有限公司 | A kind of double disc refiner is into withdrawing automatic control system |
| CN110093801A (en) * | 2019-04-24 | 2019-08-06 | 华南理工大学 | A kind of machine, liquid linkage adjust the conical refiner of forward and back knife and defibrination than pressure |
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|---|---|
| CN114277600B (en) | 2023-06-06 |
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