Double-disc pulping machine
By setting up a defective pulp discharge outlet and an explosion-proof signal feedback structure in the grinding chamber of the pulper, the problem of poor pressure control in the pulper was solved, enabling timely discharge of defective pulp and equipment shutdown control, thus ensuring the quality of pulping.
Patent Information
- Application Number
- CN202423280754.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-30
- Publication Date
- 2025-11-28
- Estimated Expiration
- 2034-12-30
AI Technical Summary
The existing double-disc refiner has poor pressure control in the grinding chamber, which leads to the generation of poor pulp and affects the pulping quality, and makes it impossible to achieve self-balancing of the refiner.
A defective pulp discharge outlet is set in the grinding chamber of the pulper, and an explosion-proof disc with a signal feedback structure is installed at the outlet. The explosion-proof disc is connected to the main controller. When the pressure in the grinding chamber is too high, it ruptures and sends a signal to stop the equipment to control the discharge of defective pulp.
By monitoring the pressure inside the grinding chamber, the generation of defective pulp can be reduced, ensuring the stable operation of the pulper and preventing substandard pulp from entering the next process.
Smart Images
Figure CN223607636U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to pulping equipment technical field, concretely relates to a double-disc refiner. BACKGROUND
[0002] As a beating equipment, the beating degree determines the paper quality. The beating quality is determined by the gap between the moving and static refiner plates. Since the double-disc refiner adjusts the moving seat by the feed and retreat knife motor to drive the moving and static refiner plates, the gap between the refiner plates is adjusted, and when the beating degree meets the requirements, the gap between the refiner plates is adjusted forward and backward due to the wear of the refiner plates, so that the gap between the refiner plates is maintained at a certain constant.
[0003] During beating, the temperature of the pulp increases. During the pumping process of the pulp, air is mixed. During the refining process, the gas mixed in the pulp expands and separates from the pulp when the temperature of the pulp increases, which causes the internal pressure of the grinding chamber to increase. The power of the main motor of the refiner increases, and the control unit sends a signal to the feed motor to drive the feed motor to adjust the gap between the refiner plates, increase the distance between the refiner plates, and then make the operating power of the main motor return to the preset value range. Although the pressure in the two grinding chamber areas is self-balanced (the pressure between the moving and static refiner plates in the two grinding areas is consistent, and the gap is the same), it is still uncertain whether the beating requirements of the paper production meet the requirements.
[0004] Controlling the content of mixed gas in the pulp can reduce the mixing of air in the pulp, reduce the temperature increase of the pulp in the grinding chamber in the later stage, and separate the gas. At the same time, the grinding chamber pressure of the retreat knife process is controlled to avoid the increase of the gap between the refiner plates, which causes the beating quality of the refiner to be not guaranteed. Therefore, the grinding chamber pressure of the refiner is controlled, and the grinding chamber pressure is strictly controlled. UTILITY MODEL CONTENTS
[0005] The technical problem to be solved by the utility model is to provide a double-disc refiner which can monitor and control the pressure in the grinding chamber and reduce the production of poor pulp.
[0006] To solve the above technical problems, the utility model adopts the following technical scheme: a double-disc refiner, which comprises a grinding chamber, a refining mechanism and a main control unit. The refining mechanism is arranged in the grinding chamber and controlled by the main control unit to beat the pulp. The grinding chamber is provided with a poor pulp discharge outlet. A pressure measuring and pulp discharging mechanism is arranged at the poor pulp discharge outlet. The pressure measuring and pulp discharging mechanism comprises an explosion-proof plate. The explosion-proof plate is a pressure explosion-proof plate with a signal feedback structure. The explosion-proof plate is arranged at the poor pulp discharge outlet and blocks the poor pulp discharge outlet. The signal feedback structure is connected with the main control unit of the double-disc refiner and sends a signal to the main control unit. After the explosion-proof plate is broken, the main control unit controls the refining mechanism to stop.
[0007] The bad slurry discharge port is provided in the grinding chamber, and a rupture disc is used for plugging, the rupture disc is a pressure rupture disc with a signal feedback structure, the signal of the rupture disc is interlocked with the main controller of the double-disc refiner, when the pressure in the grinding chamber is too high to produce bad slurry, the rupture disc is broken to discharge the bad slurry, and a signal is sent to the main controller to make the equipment stop timely.
[0008] As an optional solution, the bad slurry discharge port is provided with a connecting flange, the rupture disc is arranged at the end of the connecting flange, and the pressure measuring and slurry discharging mechanism further comprises an annular pressing plate which is detachably connected with the outer port of the flange and presses the rupture disc on the end face of the flange.
[0009] As an optional solution, a bad slurry container or a discharge channel is arranged outside the grinding chamber corresponding to the bad slurry discharge port.
[0010] Beneficial effects: the double-disc refiner has the bad slurry discharge port arranged in the grinding chamber and the pressure measuring and slurry discharging mechanism arranged at the bad slurry discharge port, when the pressure in the grinding chamber is too high to produce bad slurry, the pressure measuring and slurry discharging mechanism detects the pressure, opens the bad slurry discharge port to discharge the bad slurry, and sends a signal to the main controller to make the production stop, thereby reducing the continuous production of bad slurry as much as possible. BRIEF DESCRIPTION OF DRAWINGS
[0011] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description only show some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.
[0012] Figure 1 It is an internal structure diagram of the double-disc refiner;
[0013] Figure 2 It is Figure 1 It is an enlarged schematic view of A in the middle;
[0014] In the figure: 1, grinding chamber, 2, bad slurry discharge port, 3, rupture disc, 4, connecting flange, 5, annular pressing plate. DETAILED DESCRIPTION
[0015] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.
[0016] Please refer toFigure 1 And Figure 2 The embodiment provides a double-disc refiner, which comprises a refining chamber 1, a refining mechanism and a main controller, the refining mechanism is arranged in the refining chamber 1 and controls the refining by the main controller, the refining chamber 1 is provided with a poor pulp discharge outlet 2, a pressure measuring and discharging mechanism is arranged at the poor pulp discharge outlet 2, the pressure measuring and discharging mechanism comprises a rupture disc 3, the rupture disc 3 is a pressure rupture disc with a signal feedback structure, the rupture disc 3 is arranged at the poor pulp discharge outlet 2 and blocks the poor pulp discharge outlet 2, the signal feedback structure is connected with the main controller of the double-disc refiner and sends a signal to the main controller, and the main controller controls the refining mechanism to stop after the rupture disc 3 is broken.
[0017] Specifically, the double-disc refiner device body is internally provided with the refining chamber 1, the refining mechanism is arranged in the refining chamber 1 to refine, and the main controller is connected with action components of the refining mechanism and controls start and stop of the refining mechanism and various parameters.
[0018] The refining chamber 1 is provided with the poor pulp discharge outlet 2, the poor pulp discharge outlet 2 is communicated with the inside of the refining chamber 1, and pulp in the refining chamber 1 can be discharged to the outside of the refining chamber 1 through the poor pulp discharge outlet 2 when the poor pulp discharge outlet 2 is opened. The pressure measuring and discharging mechanism is arranged at the poor pulp discharge outlet 2, the pressure measuring and discharging mechanism comprises the rupture disc 3, the rupture disc 3 is a pressure rupture disc with a signal feedback structure or a signal feedback function, the signal feedback structure of the rupture disc 3 is connected with the main controller, the rupture disc 3 blocks the poor pulp discharge outlet 2, when the pressure in the refining chamber 1 increases to exceed the maximum bearing pressure set by the rupture disc 3, the rupture disc 3 is broken, and the poor pulp in the refining chamber 1 is discharged from the poor pulp discharge outlet 2, the main controller receives the signal of the rupture of the rupture disc 3 at the same time of the rupture of the rupture disc 3, controls the refining mechanism to stop, and reduces the output of unqualified pulp as much as possible.
[0019] In some embodiments, the main controller of the double-disc refiner continuously receives the signal transmitted by the rupture disc 3, the main controller cannot receive the signal transmitted by the rupture disc 3 after the rupture disc 3 is broken, the main controller controls the refining mechanism to stop, in order to further reduce the influence of the poor pulp, the message of the rupture of the rupture disc 3 is also transmitted to the DCS of the production line, and the whole line is controlled to stop, so that the poor pulp is prevented from continuing to be output and qualified pulp is prevented from being output from the production line.
[0020] As a specific installation example of the rupture disc 3, refer to Figure 2 The poor pulp discharge outlet 2 is provided with a connecting flange 4, the rupture disc 3 is arranged at the end of the connecting flange 4, the pressure measuring and discharging mechanism further comprises an annular pressing plate 5, the annular pressing plate 5 is detachably connected with the outer port of the flange and presses the rupture disc 3 on the end face of the flange.
[0021] Specifically, the connecting flange 4 is provided outside the mill chamber 1 at the position of the defective slurry discharge outlet 2, the inner cavity of the connecting flange 4 is the same as the defective slurry discharge outlet 2, the rupture disc 3 is arranged at the end of the connecting flange 4 and blocks the inner cavity opening of the connecting flange 4, the pressure measuring and slurry discharging mechanism comprises an annular pressure plate 5, the annular pressure plate 5 is attached to the surface of the rupture disc 3 and the inner hole of the annular pressure plate 5 corresponds to the inner cavity opening of the connecting flange 4, the annular pressure plate 5 presses the rupture disc 3 against the end of the connecting flange 4, in order to facilitate replacement of the rupture disc 3, the annular pressure plate 5 is detachably connected with the connecting flange 4 through bolts or other connecting components.
[0022] In some embodiments, in order to facilitate the defective slurry to be discharged, a defective slurry container or a discharge channel is arranged outside the mill chamber 1 at the position corresponding to the defective slurry discharge outlet 2. After the defective slurry is discharged from the defective slurry discharge outlet 2, it falls into the defective slurry container or is directly discharged through the discharge channel.
[0023] In the description of the present specification, the description of the terms "one embodiment", "example", "specific example" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.
[0024] The above is only a preferred specific implementation of the present application, but the protection scope of the present application is not limited to this, any person skilled in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.
Claims
1. A twin-disc refiner comprising a refiner chamber (1), a refiner mechanism and a main controller, the refiner mechanism being arranged in the refiner chamber (1) and the beating being controlled by the main controller, characterized in that: The mill chamber (1) is provided with a poor slurry discharge outlet (2), a pressure measuring and slurry discharging mechanism is arranged at the poor slurry discharge outlet (2), the pressure measuring and slurry discharging mechanism comprises a rupture disc (3), the rupture disc (3) is a pressure rupture disc with a signal feedback structure, the rupture disc (3) is arranged at the poor slurry discharge outlet (2) and blocks the poor slurry discharge outlet (2), the signal feedback structure is connected with a main controller of the double-disc refiner and sends a signal to the main controller, and the main controller controls the refiner to stop after the rupture disc (3) is broken.
2. A twin-disc pulp refiner according to claim 1, characterized in that: The poor slurry discharge outlet (2) is provided with a connecting flange (4), the rupture disc (3) is arranged at the end of the connecting flange (4), and the pressure measuring and slurry discharging mechanism further comprises an annular pressing plate (5), the annular pressing plate (5) is detachably connected with the outer port of the flange and presses the rupture disc (3) against the end face of the flange.
3. A twin-disc pulp refiner according to claim 1, characterized in that: A poor slurry container or a discharge channel is arranged outside the mill chamber (1) and corresponds to the poor slurry discharge outlet (2).