Wood pulp pretreatment equipment

Abstract

The utility model discloses wood pulp pretreatment equipment which comprises a mixing box body, and a beam plate is arranged in the middle of an opening in the upper end of the mixing box body; a stirring motor is mounted on the beam plate, a shaft body of the stirring motor downwards penetrates through the beam plate and is inserted into the mixing box body, and a vertical stirring blade is arranged outside the shaft body; two rotating shafts are respectively arranged on two sides of the vertical stirring blade in the mixing box body, and transverse stirring blades are arranged on the rotating shafts; the same ends of the multiple rotating shafts extend out of the mixing box body, belt wheels sleeve the protruding parts, a driving motor is installed at the bottom of the mixing box body, belt wheels sleeve the driving motor, and a transmission belt sleeves the multiple belt wheels; a cavity is formed in the wall surface of the mixing box body; an inlet water pipe and an outlet water pipe communicated with the cavity are respectively arranged at two ends of the mixing box body. The wood pulp pretreatment equipment can provide a water bath environment for mixing wood pulp fragments and a pretreatment solution, and the stirring and mixing effect is improved.

Description

Technical Field

[0001] This utility model relates to the field of wood pulp processing, specifically to a wood pulp pretreatment device. Background Technology

[0002] Wood pulp pretreatment equipment is mainly used to pretreat plant fiber raw materials to improve the efficiency and quality of subsequent processing. It mainly includes:

[0003] Raw material preparation: Tear plant fiber raw materials (such as wood pulp) into small pieces or fragments, usually 5mm×5mm in size;

[0004] Drying process: The wood pulp fragments were dried at 105°C to constant weight, and then the moisture content was equilibrated in a dryer;

[0005] Pretreatment solution preparation: Prepare a pretreatment solution with a specific ratio, such as an NMMO aqueous solution, typically with a water to NMMO mass ratio of 1:3 or 1:4.

[0006] Immersion and stirring: Immerse the wood pulp fragments in the pretreatment solution, place them in a water bath at a specific temperature, usually 80°C or 90°C, and stir.

[0007] Reaction process: Let the stirred wood pulp-pretreatment solution mixture stand for a period of time to react, usually 30 minutes;

[0008] Washing and separation: After the reaction is complete, the reaction product is washed multiple times with low concentration NMMO solvent and pure water to separate the filter residue;

[0009] Performance evaluation: The reactivity of wood pulp is evaluated by weighing the filter residue, calculating the loss of soluble components, and assessing the reactivity of the wood pulp.

[0010] In the immersion and stirring steps of the wood pulp pretreatment process, a wood pulp pretreatment device is required to stir the wood pulp fragments in a water bath at a specific temperature.

[0011] Patent CN208320529U discloses a natural herbal antibacterial wood pulp fiber mixing device, including a mixing chamber, a mixing rod, a transmission belt and a drive motor. The mixing chamber contains several mixing rods, an ultraviolet sterilization lamp and a high-pressure nozzle. The mixing rods are equipped with mixing paddles, and the mixing rods, transmission belt and drive motor constitute a mixing device. The right end of the mixing rod is equipped with a driven wheel, which is located inside the transmission belt.

[0012] The mixing device for natural herbal antibacterial wood pulp fiber has multiple horizontally positioned stirring rods, which results in poor mixing during the mixing process and needs to be improved. Utility Model Content

[0013] The purpose of this invention is to provide a wood pulp pretreatment device that can provide a water bath environment for mixing wood pulp fragments with a pretreatment solution and improve the mixing effect.

[0014] To achieve the above objectives, this utility model provides a wood pulp pretreatment device, which includes a mixing chamber. A beam plate is provided at the middle position of the upper opening of the mixing chamber. A stirring motor is installed on the beam plate, and the shaft of the stirring motor passes downward through the beam plate and is inserted into the mixing chamber. Vertical stirring blades are provided outside the shaft. Two rotating shafts are provided on each side of the vertical stirring blades in the mixing chamber, and horizontal stirring blades are provided on the rotating shafts. The same end of multiple rotating shafts extends out of the mixing chamber and a pulley is sleeved on the protruding part. A drive motor is installed at the bottom of the mixing chamber, and a pulley is sleeved on the drive motor. A transmission belt is sleeved between the multiple pulleys. A cavity is provided in the wall of the mixing chamber, and an inlet water pipe and an outlet water pipe communicating with the cavity are respectively provided at both ends of the mixing chamber.

[0015] Preferably, a rectangular discharge port is provided at the bottom of the mixing chamber; a rectangular discharge pipe is provided outside the rectangular discharge port, and a strip hole is provided on the rectangular discharge pipe, into which a gate is inserted; a mounting plate is fixedly connected to the outside of the mixing chamber, and a cylinder is mounted on the mounting plate, with the cylinder shaft of the cylinder connected to the gate via a connecting rod.

[0016] Preferably, the inner bottom surface of the mixing chamber is an inclined surface, and the height of the end of the inclined surface away from the rectangular discharge port is greater than the height of the end closer to the rectangular discharge port.

[0017] Preferably, the bottom of the mixing chamber is provided with multiple support feet.

[0018] Preferably, the mixing box is provided with positioning grooves on both sides; the two ends of the beam plate are embedded in the positioning grooves, the positioning grooves are provided with screw holes, and screws are inserted into the beam plate and screwed into the screw holes.

[0019] Preferably, the vertical stirring blade includes a plurality of first comb-shaped blades arranged circumferentially.

[0020] Preferably, the transverse stirring blade includes a plurality of second comb-shaped blades arranged circumferentially.

[0021] According to the above technical solution, this utility model provides a wood pulp pretreatment device, which includes a mixing chamber. A beam plate is provided at the middle position of the upper opening of the mixing chamber. A stirring motor is installed on the beam plate. The shaft of the stirring motor passes downward through the beam plate and is inserted into the mixing chamber. A vertical stirring blade is provided outside the shaft. Two rotating shafts are provided on each side of the vertical stirring blades in the mixing chamber. A horizontal stirring blade is provided on each rotating shaft. The same end of multiple rotating shafts extends out of the mixing chamber and a pulley is sleeved on the protruding part. A drive motor is installed at the bottom of the mixing chamber. A pulley is sleeved on the drive motor. A transmission belt is sleeved between multiple pulleys. A cavity is provided in the wall of the mixing chamber. An inlet water pipe and an outlet water pipe communicating with the cavity are respectively provided at both ends of the mixing chamber.

[0022] The wood pulp pretreatment equipment has the following advantages: 1. By setting a cavity in the wall of the mixing tank and setting an inlet water pipe and an outlet water pipe connecting the cavity, and connecting it to a circulating constant temperature water supply equipment, constant temperature water can be continuously delivered into the cavity, providing a water bath environment for mixing wood pulp fragments and pretreatment solution; 2. By combining multiple four horizontal stirring blades and one vertical stirring blade, more thorough stirring of the mixture is provided, improving stirring and mixing and increasing the reaction rate; 3. By using a drive motor to synchronously drive multiple rotating shafts, the driving effect is improved.

[0023] Other features and advantages of this invention will be described in detail in the following detailed description section. Attached Figure Description

[0024] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the following detailed description to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0025] Figure 1 This is a schematic diagram of the overall structure of a preferred embodiment of a wood pulp pretreatment equipment;

[0026] Figure 2 This is a top view schematic diagram of a preferred embodiment of a wood pulp pretreatment equipment;

[0027] Figure 3 yes Figure 2 A schematic diagram of the AA cross-sectional structure;

[0028] Figure 4 yes Figure 2 A schematic diagram of the BB cross-sectional structure.

[0029] Explanation of reference numerals in the attached figures

[0030] 1-Mixing box; 2-Rotating shaft; 3-Beam plate; 4-Agitator motor; 5-Vertical agitator blade; 6-Outlet water pipe; 7-Protruding part; 8-Drive belt; 9-Pulley; 10-Drive motor; 11-Support foot; 12-Rectangular discharge pipe; 13-Gate plate; 14-Mounting plate; 15-Cylinder; 16-Screw; 17-Horizontal agitator blade; 18-Shaft; 19-Inclined surface; 20-Cavity; 21-Inlet water pipe; 22-Rectangular discharge port. Detailed Implementation

[0031] The specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of this utility model.

[0032] In this utility model, unless otherwise stated, directional terms such as "up, down, left, right, front, back, inside, outside" in the terminology only represent the orientation of the term in its conventional use or are common terms understood by those skilled in the art, and should not be regarded as a limitation on the term.

[0033] See Figure 1-4 The wood pulp pretreatment equipment shown includes a mixing chamber 1. A beam plate 3 is provided at the middle position of the upper opening of the mixing chamber 1. A stirring motor 4 is installed on the beam plate 3. The shaft 18 of the stirring motor 4 passes downward through the beam plate 3 and is inserted into the mixing chamber 1. A vertical stirring blade 5 is provided outside the shaft 18. Two rotating shafts 2 are provided on each side of the vertical stirring blade 5 inside the mixing chamber 1. A horizontal stirring blade 17 is provided on the rotating shaft 2. The same end of multiple rotating shafts 2 extends out of the mixing chamber 1 and a pulley 9 is fitted on the protruding part 7. A drive motor 10 is installed at the bottom of the mixing chamber 1. A pulley 9 is fitted on the drive motor 10. A transmission belt 8 is fitted between multiple pulleys 9. A cavity 20 is provided in the wall of the mixing chamber 1. An inlet water pipe 21 and an outlet water pipe 6 connecting the cavity 20 are respectively provided at both ends of the mixing chamber 1.

[0034] By implementing the above technical solution, a cavity 20 is set inside the wall of the mixing chamber 1, and an inlet water pipe 21 and an outlet water pipe 6 are connected to the cavity 20 and connected to a circulating constant temperature water supply device. This allows for the continuous supply of constant temperature water into the cavity 20, providing a water bath environment for mixing wood pulp fragments and the pretreatment solution. Multiple horizontal stirring blades 17 and one vertical stirring blade 5 are combined to provide more thorough mixing of the mixture, improving mixing efficiency and increasing the reaction rate. A drive motor 10 synchronously drives multiple rotating shafts 2, enhancing the driving effect. Furthermore, the rotating shafts 2 can be connected to the wall of the mixing chamber 1 using a mechanical seal or a skeleton oil seal, facilitating rotation while increasing sealing effectiveness.

[0035] In this embodiment, to facilitate material discharge, a rectangular discharge port 22 is provided at the bottom of the mixing chamber 1; a rectangular discharge pipe 12 is provided outside the rectangular discharge port 22, and a strip-shaped hole is provided on the rectangular discharge pipe 12. A gate plate 13 is inserted into the strip-shaped hole; a mounting plate 14 is fixedly connected to the outside of the mixing chamber 1, and a cylinder 15 is mounted on the mounting plate 14. The cylinder shaft of the cylinder 15 is connected to the gate plate 13 through a connecting rod. During material discharge, the gate plate 13 is driven vertically upward by the cylinder 15 to open the rectangular discharge pipe 12 for material discharge. During mixing and stirring, the gate plate 13 is driven vertically downward by the cylinder 15 to close the rectangular discharge pipe 12. To improve the sealing effect, a sealing ring is embedded around the strip-shaped hole and around the gate plate 13.

[0036] In this embodiment, the inner bottom surface of the mixing tank 1 is an inclined surface 19, and the height of the end of the inclined surface 19 away from the rectangular discharge port 22 is greater than the height of the end closer to the rectangular discharge port 22. This arrangement further enhances the discharge effect.

[0037] In this embodiment, the bottom of the mixing tank 1 is provided with a plurality of support feet 11. The support feet 11 provide better support for the mixing tank 1.

[0038] In this embodiment, positioning grooves are provided on both sides of the mixing chamber 1; both ends of the beam plate 3 are embedded in the positioning grooves, and screw holes are provided in the positioning grooves. Screws 16 are threaded through the beam plate 3 and screwed into the screw holes. This design achieves a detachable structure for the beam plate 3, facilitating later inspection, maintenance, and cleaning of the interior of the mixing chamber 1. Of course, when the mixing operation requires a high temperature, a cover plate can be added to the uncovered part of the upper end of the mixing chamber 1 to improve the insulation effect.

[0039] In this embodiment, the vertical stirring blade 5 includes a plurality of first comb-shaped blades arranged circumferentially. The horizontal stirring blade 17 includes a plurality of second comb-shaped blades arranged circumferentially. The first and second comb-shaped blades have the same structure but different sizes, and the comb-shaped structure facilitates the dispersion of the mixed solution.

[0040] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within the protection scope of the present invention.

[0041] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable way without contradiction. In order to avoid unnecessary repetition, this utility model will not describe the various possible combinations separately.

[0042] Furthermore, various different embodiments of this utility model can be combined in any way, as long as they do not violate the spirit of this utility model, they should also be regarded as the content disclosed by this utility model.

Claims

1. A wood pulp pretreatment device, characterized in that, The wood pulp pretreatment equipment includes a mixing box (1), and a beam plate (3) is provided at the middle position of the upper opening of the mixing box (1); A stirring motor (4) is installed on the beam plate (3). The shaft (18) of the stirring motor (4) passes through the beam plate (3) downward and is inserted into the mixing box (1). A vertical stirring blade (5) is provided outside the shaft (18). The mixing chamber (1) is equipped with two rotating shafts (2) on each side of the vertical stirring blade (5), and the rotating shafts (2) are equipped with horizontal stirring blades (17); Multiple rotating shafts (2) extend from the same end to the outside of the mixing box (1) and are fitted with pulleys (9) on the protruding part (7). A drive motor (10) is installed at the bottom of the mixing box (1). The drive motor (10) is fitted with pulleys (9), and a transmission belt (8) is fitted between the multiple pulleys (9); The mixing tank (1) has a cavity (20) inside its wall, and the two ends of the mixing tank (1) are respectively provided with an inlet water pipe (21) and an outlet water pipe (6) that connect to the cavity (20).

2. The wood pulp pretreatment equipment according to claim 1, characterized in that, The bottom of the mixing box (1) is provided with a rectangular discharge port (22); A rectangular discharge pipe (12) is provided outside the rectangular discharge port (22), and a strip hole is provided on the rectangular discharge pipe (12), and a gate plate (13) is inserted into the strip hole; The mixing box (1) is fixedly connected to an external mounting plate (14), and a cylinder (15) is mounted on the mounting plate (14). The cylinder shaft of the cylinder (15) is connected to the gate plate (13) by a connecting rod.

3. The wood pulp pretreatment equipment according to claim 2, characterized in that, The inner bottom surface of the mixing box (1) is an inclined surface (19), and the height of the end of the inclined surface (19) away from the rectangular discharge port (22) is greater than the height of the end close to the rectangular discharge port (22).

4. The wood pulp pretreatment equipment according to claim 1, characterized in that, The bottom of the mixing box (1) is provided with multiple support feet (11).

5. The wood pulp pretreatment equipment according to claim 1, characterized in that, The mixing box (1) has positioning grooves on both sides; Both ends of the beam plate (3) are embedded in the positioning groove, and the positioning groove is provided with screw holes. Screws (16) are inserted into the beam plate (3) and screwed into the screw holes.

6. The wood pulp pretreatment equipment according to claim 1, characterized in that, The vertical stirring blade (5) includes a plurality of first comb-shaped blades arranged circumferentially.

7. The wood pulp pretreatment equipment according to claim 1, characterized in that, The transverse stirring blade (17) includes a plurality of second comb-shaped blades arranged circumferentially.

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