Poplar chemi-mechanical pulp i-CTMP pulping system
By simplifying the structure of the poplar chemimechanical pulping system, using a low-power motor and screw conveyor, and combining a high-temperature softening pipe and a leveling bin, the technical problems of high-temperature softening and leveling bins in existing poplar chemimechanical systems have been solved, reducing energy consumption and equipment costs, and expanding production scale.
Patent Information
- Application Number
- CN202423313364.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2025-11-28
- Estimated Expiration
- 2034-12-31
AI Technical Summary
Existing poplar chemimechanical pulping systems are complex, costly, energy-intensive, and require a large area, with high equipment procurement and operating expenses.
A poplar chemimechanical pulping system, i-CTMP, is adopted. By simplifying the equipment structure, using low-power motors and screw conveyors, reducing high-consistency grinding equipment, and adding high-temperature softening pipes and equalization bins, high-temperature softening and equalization of materials are achieved, thereby reducing energy consumption.
It achieves the same production capacity with fewer equipment, smaller footprint, lower investment cost, and lower energy consumption per ton of slurry, and is suitable for upgrading and expanding production scale on existing production lines.
Smart Images
Figure CN223607631U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the field of chemical pulp equipment, and particularly relates to a poplar chemical pulp i-CTMP pulping system. BACKGROUND
[0002] The current poplar chemical pulp pulping system uses a PRC-APMP pulping process, and the corresponding process flow of the used equipment is as shown in the figure, wherein wood chip washing - steaming bin 1 - metering screw 2 - 1# extrusion tearing 3 - 1# pre-dipping 4 - 1# reaction tower 5 - 1# discharge screw 6 - 2# extrusion tearing 7 - 2# pre-dipping 8 - 2# reaction tower 9 - 2# discharge screw 10 - conveying screw 1 - chute 12 - side feeding screw 13 - 1# high consistency grinding - 1# bleaching tower - press dewatering 2# high consistency grinding - recreational pool - low consistency grinding. Figure 1
[0003] The existing characteristics are as follows:
[0004] 1. Two-stage wood chip extrusion tearing pre-dipping system is arranged: two-stage wood chip extrusion pre-dipping systems are arranged according to the characteristics of poplar, wood chips are subjected to sufficient extrusion, and the uniform reaction of wood chips and chemical liquid is effectively promoted, wood chips are softened, but the extrusion tearing machine is a high-energy equipment, a high-voltage high-power motor is matched, the pre-dipping equipment structure is complex, and the cost is high.
[0005] 2. Two-stage high consistency grinding: bleaching chemical liquid is added in the pulp spraying pipe of the first-stage high consistency grinding, the characteristics of high temperature, high consistency and high pressure are fully utilized, the mixing of the chemical liquid and the pulp is promoted, the bleaching reaction of the pulp in the high consistency bleaching tower is beneficial, thereby the system drug requirement and the investment of the bleaching equipment are greatly reduced, but a high-power high-voltage motor needs to be matched; the second-stage normal pressure grinding and pressure spraying can reduce the spraying of the limiting amount, but a high-power high-voltage motor also needs to be matched, the high consistency grinding precision is precise, a plurality of matching systems are matched, the cost is high, the land occupation area is large, a high-power high-voltage motor needs to be matched, and the energy consumption is high.
[0006] Although the purchase of the equipment is one-time purchase for lifelong use, the process is complicated, the number of selected equipment is large, the total power consumption is large, the land occupation area is large, and the building area is also large. UTILITY MODEL CONTENTS
[0007] The utility model provides a poplar chemical pulp i-CTMP pulping system aiming at the deficiencies described in the prior art, simplifies the equipment usage amount, can also produce the same capacity, the land occupation area is small, the investment cost is low, and the ton pulp energy consumption is low.
[0008] The technical scheme adopted by the utility model is as follows:
[0009] The application discloses a poplar chemical pulp i-CTMP pulping system, which comprises a steaming bin, a metering screw conveyor arranged at the bottom outlet of the steaming bin, a reversing conveying structure connected with the output end of the metering screw conveyor, a screw feeder connected with the output end of the reversing conveying structure, a transverse pipe of a T-shaped pipe communicated with the output end of the screw feeder, a check structure arranged in the transverse pipe, and a gap reserved between the check member of the check structure and the inner wall of the transverse pipe.
[0010] As a preferred scheme of the application, the reversing conveying structure comprises a screw conveyor, a turning screw conveyor and a chute, the input end of the screw conveyor is communicated with the output end of the metering screw conveyor, the output end of the screw conveyor is communicated with the input end of the turning screw conveyor, the turning screw conveyor is vertically arranged, the output end of the turning screw conveyor is communicated with the chute, and the chute is communicated with the input end of the screw feeder.
[0011] As a preferred scheme of the application, the check structure comprises a check member and a check telescopic power member, the telescopic part of the check telescopic power member is connected with the check member and drives the check member to move in the transverse pipe.
[0012] As a preferred scheme of the application, the high-temperature softening pipe comprises a softening pipe body, a conveying softening channel is arranged on the softening pipe body, an inlet and a screw mounting port are arranged on the end of the conveying softening channel close to the T-shaped pipe, the screw conveying shaft of the screw conveyor I extends into the conveying softening channel through the screw mounting port, the end of the conveying softening channel away from the T-shaped pipe is provided with an outlet, the conveying softening channel is provided with a steam inlet and a steam outlet at the position between the inlet and the outlet.
[0013] The utility model discloses change the equipment used in the original PRC-APMP pulping process, through spiral conveying, the material is discharged from the steaming bin and reverses the delivery to the spiral feeder and carries out high temperature softening, and only carries out once, on one hand, greatly reduces the equipment use amount of the high consistency refiner presequence, does not have high -power equipment, on the other hand, the motor, cylinder etc. used are very small in energy consumption, reduce the installed power of whole equipment, can increase production and save energy, and can be flexibly set according to the production line, and the equipment that evenly comes out can also be designed again line to supplement production and expand production scale. BRIEF DESCRIPTION OF DRAWINGS
[0014] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description, obviously, the drawings in the following description only some embodiments of the utility model, for those skilled in the art, under the premise of not paying creative labor, other drawings can also be obtained according to these drawings.
[0015] Figure 1 It is the equipment assembly drawing for PRC-APMP pulping process.
[0016] Figure 2 It is the equipment assembly schematic view of the utility model. DETAILED DESCRIPTION
[0017] The technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model, obviously, the described embodiments only some embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without paying creative labor belong to the protection scope of the utility model.
[0018] Embodiment:
[0019] A poplar chemi-thermomechanical pulp i-CTMP pulping system, as shown in Figure 2As shown, including steaming bin 1, provided with a metering screw scale A at the bottom outlet of the steaming bin 1, the output end of the metering screw scale A is communicated with the input end of the screw conveyor B, the output end of the screw conveyor B is communicated with the input end of the reversing screw conveyor C, the reversing screw conveyor C is vertically arranged, the output end of the reversing screw conveyor C is communicated with the chute D, the chute D is communicated with the input end of the screw feeder E, the output end of the screw feeder E is communicated with the transverse pipe of the T-shaped pipe F, the reverse stop structure is arranged in the transverse pipe, and a gap is reserved between the reverse stop piece of the reverse stop structure and the inner wall of the transverse pipe; and the reverse stop structure comprises a reverse stop piece and a reverse stop telescopic power piece, the telescopic part of the reverse stop telescopic power piece is connected with the reverse stop piece and drives the reverse stop piece to move in the transverse pipe. Since the T-shaped pipe is directly communicated with the high-temperature softening pipe, there is also high-pressure steam in the T-shaped pipe. In order to prevent steam from entering the screw feeder, the reverse stop structure is specially arranged.
[0020] The vertical pipe of the T-shaped pipe F is communicated with the high-temperature softening pipe G, the output end of the high-temperature softening pipe G is communicated with the equalizing bin H, and the side output port of the equalizing bin H is provided with a side feeding screw conveyor K. The high-temperature softening pipe G used comprises a softening pipe body, a conveying softening channel is arranged in the softening pipe body, the conveying softening channel is provided with a feeding port and a screw mounting port near the end of the T-shaped pipe F, and the screw conveying shaft of the screw conveyor I extends into the conveying softening channel through the screw mounting port; the conveying softening channel is provided with a discharging port away from the end of the T-shaped pipe F; the conveying softening channel is provided with a steam inlet and a steam outlet at a position between the feeding port and the discharging port.
[0021] The metering screw scale conveys the material conveyed by the steaming bin to the screw feeder through the reversing conveying structure, the material in the screw feeder is extruded into a plug, the plug is conveyed to the T-shaped pipe from the gap reserved between the reverse stop piece and the transverse pipe, and then enters the high-temperature softening pipe for high-temperature cooking and softening, and after softening, enters the equalizing bin, the T-shaped pipe, the high-temperature softening pipe and the equalizing bin are all pressure vessels, the chemical medicine is pre-positioned and high-temperature softened, which reduces the energy consumption of the subsequent high-concentration refiner.
[0022] And the equalizing bin is provided with a material stirring mechanism, the material stirring mechanism stirs the material falling into the equalizing bin to the side to enter the high-concentration mill from the side feeding screw conveyor.
[0023] The application mainly transforms the current poplar chemical pulp machine pulp PRC-APMP system, under the premise of not changing the key equipment (not including some equipment has reached the limit capacity, become the bottleneck of production), by increasing the necessary equipment screw feeder, high temperature softening system (T type pipe, high temperature softening pipe, balance bin) and necessary screw conveying equipment, at the same time, 1# extrusion tearing machine, 1# screw pre-soaker, 1# reaction tower, 2# extrusion tearing machine, 2# screw pre-soaker in PRC-APMP system are short-circuited, energy consumption is accompanied by production, therefore, reducing energy consumption is to create profit, the transformation into i-CTMP process suitable for production, energy saving optimization scheme is beneficial to the development of current pulp mill.
[0024] Because the old line transformation workshop space is fixed, the material needs to be transferred by appropriate conveying screw, because the conveying screw motor is small, the energy consumption is almost not affected.
[0025] Before transformation, the customer's on-site equipment configuration needs to be consulted, and the customer's site space, the capacity of high consistency grinder and the main motor power are calculated.
[0026] Using the application scheme to transform the existing production line can increase production, save energy, reduce equipment installed power, and the uniformed equipment can also be designed again to supplement production and expand production scale.
[0027] In the description of the specification, the description of the reference terms "one embodiment", "example", "specific example" and the like means that the specific features, structures, materials or characteristics described in combination with the embodiment or example are contained in at least one embodiment or example of the utility model. In the 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 way.
[0028] The above is only the preferred specific implementation of the utility model, but the protection scope of the utility model is not limited to this, any skilled person in the art can make equivalent replacement or change according to the technical scheme and the utility model concept of the utility model within the technical range disclosed by the utility model, which should be covered in the protection scope of the utility model.
Claims
1. A poplar chemi-thermomechanical pulp i-CTMP pulping system comprising a digesting chest (1), characterized in that: A metering screw scale (A) is arranged at the bottom outlet of the steaming bin (1), the output end of the metering screw scale (A) is communicated with a reversing conveying structure, the output end of the reversing conveying structure is communicated with a screw feeder (E), the output end of the screw feeder (E) is communicated with the transverse pipe of a T-shaped pipe (F), a check structure is arranged in the transverse pipe, and a gap is reserved between the check member of the check structure and the inner wall of the transverse pipe; the vertical pipe of the T-shaped pipe (F) is communicated with a high-temperature softening pipe (G), the output end of the high-temperature softening pipe (G) is communicated with an equalizing bin (H), and a side feeding screw conveyor (K) is arranged at the side output port of the equalizing bin (H).
2. The aspen chemi-thermomechanical pulp i-CTMP pulping system of claim 1, wherein: The reversing conveying structure comprises a screw conveyor (B), a turning screw conveyor (C) and a chute (D), the input end of the screw conveyor (B) is communicated with the output end of the metering screw scale (A), the output end of the screw conveyor (B) is communicated with the input end of the turning screw conveyor (C), the turning screw conveyor (C) is vertically arranged, the output end of the turning screw conveyor (C) is communicated with the chute (D), and the chute (D) is communicated with the input end of the screw feeder (E).
3. The aspen chemi-thermomechanical pulp i-CTMP pulping system according to claim 1 or 2, characterized in that: The check structure comprises a check member and a check telescopic power member, the telescopic part of the check telescopic power member is connected with the check member and drives the check member to move in the transverse pipe.
4. The aspen chemi-thermomechanical pulp i-CTMP pulping system of claim 3, wherein: The high-temperature softening pipe (G) comprises a softening pipe body, a conveying softening channel is arranged in the softening pipe body, a feeding port and a screw mounting port are arranged at the end of the conveying softening channel close to the T-shaped pipe (F), the screw conveying shaft of the screw conveyor I extends into the conveying softening channel through the screw mounting port; a discharging port is arranged at the end of the conveying softening channel away from the T-shaped pipe (F); a steam inlet and a steam outlet are arranged at the position of the conveying softening channel between the feeding port and the discharging port.