Disc mill and method for controlling action element action in beating process thereof

A control method and disc refiner technology, applied in pulp beating/refining method, electrical program control, digital control, etc., can solve the problems of pulp conveying device failure, grinding disc rupture, low liquid level in the pulp pool, etc., to prevent The effect of friction collision

Inactive Publication Date: 2009-04-22
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] During the beating process, certain factors may cause a sudden interruption of slurry delivery, such as blockage due to high local slurry concentration, low liquid level in the slurry tank, or failure of the slurry delivery device, etc.
The sudden interruption of the slurry will cause no slurry to pass through the grinding area, which may cause severe friction or even collision between the movable grinding table and the fixed grinding table, resulting in excessive wear of the grinding table, and even rupture of the grinding table, resulting in serious consequences

Method used

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  • Disc mill and method for controlling action element action in beating process thereof
  • Disc mill and method for controlling action element action in beating process thereof
  • Disc mill and method for controlling action element action in beating process thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0033] In this embodiment, the installation position of the pressure sensor 17 is as follows image 3 As shown, the pressure sensor is installed on the slurry feeding pipeline 16.

[0034] (1) When the pulp tank before the mill is full of pulp, start the beating system for beating. Connect the power supply of the disc grinder control device, start the disc grinder hydraulic control system, and then start the main motor to make the disc grinder motorized disc 6 rotate with the shaft 4. The pressure oil of the hydraulic control system enters the left side of the oil cylinder 1 through the oil tank 14, the oil filter 13, the oil pump 11, and the electromagnetic reversing valve 9. The pressure oil pushes the piston 2 to move to the right, and pushes the sleeve 3 to drive the shaft 4 to move to the right. Make the movable millstone seat 5 and the movable millstone 6 move to the right, the movable millstone 6 leaves the fixed millstone 7, is in the state of withdrawing the knife, a...

Embodiment 2

[0040] Embodiment 2 has the same steps as Embodiment 1, the difference is that the installation position of the pressure sensor 17 is as follows: Figure 4 As shown, the pressure sensor 17 is installed on the slurry outlet pipeline 18 .

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Abstract

The invention discloses a disc refiner and a control method for the actuation of executive elements during the beating of the disc refiner. The control method comprises the following steps: a pulp inlet pipeline or a pulp outlet pipe of the disc refiner is provided with a pressure sensor; and the actuation of the executive elements of the disc refiner is controlled according to the pulp flow pressure of the pulp inlet pipeline during the beating, thereby controlling the beating process of the disc refiner. The method adopted in the invention is to control the actuation of the executive elements during the beating of the disc refiner, and can effectively prevent the friction collision among the executive elements of the disc refiner caused by pulp interruption during beating, thereby protecting the disc refiner.

Description

technical field [0001] The invention belongs to the field of pulping and papermaking, and relates to a disk refiner for pulp preparation and a method for controlling the action of an actuator during the pulping process. Background technique [0002] The production process of the pulp and paper industry includes two stages of pulping and papermaking technology. The pulping process is to make various raw materials (including wood raw materials, straw, wheat straw, bamboo and other non-wood raw materials) by chemical or mechanical methods. The fiber raw material for papermaking——slurry, and the papermaking process uses the product slurry in the pulping section to be beaten and used for papermaking by paper machines to produce products suitable for various purposes—paper. The function of beating is to make the pulp fiber produce the effects of water absorption, swelling, fibrillation, and cutting through the action of mechanical shear force, and improve the bonding force between...

Claims

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Application Information

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IPC IPC(8): D21D1/30G05B19/18
Inventor 雷利荣李友明
Owner SOUTH CHINA UNIV OF TECH
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