High-speed premixing device for cellulose alkalization

Abstract

The utility model discloses a high-speed premixing device for cellulose alkalization, which comprises a mixing shell, a mixing chamber and a pushing chamber which are arranged up and down are arranged in the mixing shell, the pushing chamber is positioned at the bottom of the mixing chamber, and a connecting gap is arranged between the mixing chamber and the pushing chamber. The cross sections of the mixing chamber and the pushing chamber in the longitudinal direction are both of a circular structure, and the diameter of the pushing chamber is smaller than that of the mixing chamber; a stirring shaft which is transversely arranged is mounted in the mixing chamber, a plurality of groups of paddles which are arranged at equal intervals are mounted on a main body of the stirring shaft, and each paddle is of a T-shaped structure; a transversely-arranged pushing shaft is installed in the pushing cavity, and a spiral is installed on a main body of the pushing shaft. According to the high-speed premixing device for cellulose alkalization, provided by the utility model, pulp can be quickly alkalized before entering a reaction kettle, and the alkalization time of materials in the reaction kettle is greatly shortened, so that the efficiency of the reaction kettle is improved, and the yield is increased.

Description

Technical Field

[0001] This utility model relates to a premixing device, specifically, to a high-speed premixing device for cellulose alkalization, belonging to the field of cellulose alkalization technology. Background Technology

[0002] Cellulose is a large polysaccharide composed of glucose molecules. Traditional alkalization processes for cellulose involve two methods:

[0003] One method involves directly adding the crushed cotton pulp and solvent into the reactor for alkalization, followed by the etherification reaction. This process takes a relatively long time and has a relatively high cost.

[0004] Another method is to use an attachment Figure 1 The premixing device shown introduces pulverized cotton pulp into the device through pulp inlet 1, where it is mixed by screw 4, and then enters the reactor through outlet 3. Multiple solvent inlets 2 are located at pulp inlet 1. The pulp and solvent are mixed by screw 4, which simultaneously conveys the mixed material to outlet 3, where it then enters the reactor. The problem with this device is that the mixing time between the pulp and solvent is too short, resulting in insufficient alkalization before entering the reactor. Sufficient alkalization is required in the reactor, but the long alkalization time leads to low yield.

[0005] In conclusion, the existing technology obviously has inconveniences and defects in practical use, so it is necessary to improve it. Utility Model Content

[0006] This invention addresses the shortcomings of the prior art by providing a high-speed premixing device for cellulose alkalization, which enables rapid alkalization of pulp before it enters the reactor, greatly shortening the alkalization time of the material in the reactor, thereby improving reactor efficiency and increasing output.

[0007] To solve the above technical problems, the present invention adopts the following technical solution:

[0008] A high-speed premixing device for cellulose alkalization includes a mixing shell, inside which there are a mixing chamber and a pushing chamber arranged vertically. The pushing chamber is located at the bottom of the mixing chamber, and there is a connecting gap between the mixing chamber and the pushing chamber. The mixing chamber and the pushing chamber have circular cross-sections along the longitudinal direction, and the diameter of the pushing chamber is smaller than the diameter of the mixing chamber.

[0009] The mixing chamber is equipped with a horizontally arranged stirring shaft, and the main body of the stirring shaft is equipped with multiple sets of blades arranged at equal intervals, the blades having a T-shaped structure.

[0010] A horizontally arranged push shaft is installed in the push chamber, and a spiral is installed on the main body of the push shaft.

[0011] Furthermore, the stirring shaft is rotatably connected to the mixing shell, and one end of the stirring shaft is connected to a stirring reduction motor outside the mixing shell.

[0012] Furthermore, the push shaft is arranged parallel to the stirring shaft, the push shaft is rotatably connected to the mixing shell, and one end of the push shaft is connected to a push reduction motor outside the mixing shell.

[0013] Furthermore, the push reduction motor and the stirring reduction motor are located on the same outer side of the mixing shell.

[0014] Furthermore, adjacent sets of blades are arranged in an alternating pattern.

[0015] Furthermore, a pulp inlet is provided directly above the mixing chamber, and solvent inlets are provided on both sides of the pulp inlet.

[0016] Furthermore, a discharge port is provided at one end of the pushing chamber, and a discharge valve is installed on the discharge port.

[0017] Furthermore, multiple legs are fixedly installed at the bottom of the mixing housing, and the tops of the legs are fixedly connected to the outer wall of the mixing chamber.

[0018] Compared with the prior art, the present invention, by adopting the above technical solution, has the following advantages:

[0019] The pulp and solvent are added to the mixing chamber. The paddle rotates at high speed to mix the pulp and solvent quickly and fully alkalize them. The stirring time can be set to improve the alkalization efficiency. After alkalization, the screw conveys the alkalized material to the discharge port, and the material enters the reactor through the discharge port.

[0020] Before entering the reactor, the pulp undergoes rapid alkalization. After alkalization, the material is fed into the reactor, which greatly shortens the alkalization time of the material in the reactor, thereby improving the reactor efficiency and increasing the output.

[0021] In the existing technology, the alkalization time of pulp in the reactor is 2.5 hours. With the adoption of this utility model, the alkalization time can be shortened to 1 hour, which greatly shortens the reaction time cycle, improves production efficiency, increases production capacity, and reduces production costs.

[0022] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of a premixing device for cellulose alkalization in the prior art;

[0024] Figure 2 This is a schematic diagram of the structure of this utility model;

[0025] Figure 3 This is a schematic diagram of the internal structure of this utility model;

[0026] Figure 4 This is a cross-sectional schematic diagram of the hybrid shell in this utility model.

[0027] In the diagram, 1-Pulp inlet, 2-Solvent inlet, 3-Outlet, 4-Spiral, 5-Mixing shell, 6-Mixing chamber, 7-Pushing chamber, 8-Connecting gap, 9-Stirring shaft, 10-Impeller, 11-Stirring geared motor, 12-Pushing shaft, 13-Pushing geared motor, 14-Support leg. Detailed Implementation

[0028] To provide a clearer understanding of the technical features, objectives, and effects of this utility model, the specific embodiments of this utility model are now described with reference to the accompanying drawings.

[0029] like Figures 2-4 As shown in the figure, this utility model provides a high-speed premixing device for cellulose alkalization, including a mixing shell 5. The mixing shell 5 has a mixing chamber 6 and a pushing chamber 7 arranged vertically inside the mixing shell 5. The pushing chamber 7 is located at the bottom of the mixing chamber 6, and a connecting gap 8 is provided between the mixing chamber 6 and the pushing chamber 7.

[0030] Both the mixing chamber 6 and the pushing chamber 7 have circular cross-sections along the longitudinal direction, and the diameter of the pushing chamber 7 is smaller than the diameter of the mixing chamber 6.

[0031] The mixing chamber 6 is equipped with a horizontally arranged stirring shaft 9, which is rotatably connected to the mixing shell 5. Multiple sets of blades 10 are installed on the main body of the stirring shaft 9. The blades 10 are T-shaped and adjacent sets of blades 10 are staggered. One end of the stirring shaft 9 is connected to the stirring reduction motor 11 outside the mixing shell 5.

[0032] The mixing chamber 6 is provided with a pulp inlet 1 directly above it, and solvent inlets 2 are provided on both sides of the pulp inlet 1.

[0033] The stirring and reduction motor 11 drives the paddle 10 to rotate at high speed through the stirring shaft 9, which quickly mixes the pulp and solvent entering the mixing chamber 6 and fully alkalizes them.

[0034] A horizontally arranged push shaft 12 is installed in the push chamber 7. The push shaft 12 is parallel to the stirring shaft 9. The push shaft 12 is rotatably connected to the mixing shell 5. A spiral 4 is installed on the main body of the push shaft 12. One end of the push shaft 12 is connected to the push reduction motor 13 outside the mixing shell 5.

[0035] The push reduction motor 13 and the stirring reduction motor 11 are located on the outer side of the same end of the mixing shell 5.

[0036] The push chamber 7 has a discharge port 3 at one end, and a discharge valve is installed on the discharge port 3. The discharge port 3 is used to output the alkalized material.

[0037] The bottom of the mixing shell 5 is fixedly equipped with multiple legs 14, and the top of the legs 14 is fixedly connected to the outer wall of the mixing chamber 6.

[0038] The specific working principle of this utility model is as follows:

[0039] Pulp is added into mixing chamber 6 through pulp inlet 1, and solvent is added into mixing chamber 6 through solvent inlet 2. The paddle 10 in mixing chamber 6 rotates at high speed driven by stirring reduction motor 11, so that pulp and solvent are quickly mixed and fully alkalized. The stirring time can be set to improve alkalization efficiency. After alkalization, push reduction motor 13 drives screw 4 to rotate and transport the material after initial alkalization to discharge port 3. The material enters the reactor through discharge port 3.

[0040] Before entering the reactor, the pulp undergoes rapid alkalization. After alkalization, the material is fed into the reactor, significantly shortening the alkalization time within the reactor, thereby improving reactor efficiency and increasing output. In existing technologies, the alkalization time of pulp in the reactor is 2.5 hours. With this invention, the alkalization time can be shortened to 1 hour, greatly reducing the reaction cycle, improving production efficiency, increasing capacity, and reducing production costs.

[0041] The above description provides examples of the preferred embodiments of this utility model. Any aspects not detailed herein are common knowledge to those skilled in the art. The scope of protection of this utility model is determined by the claims. Any equivalent modifications based on the technical teachings of this utility model are also within the scope of protection of this utility model.

Claims

1. A high speed premixing device for alkali treatment of cellulose, characterized by: The mixing shell (5) is internally provided with the mixing chamber (6) and the pushing chamber (7) arranged in sequence, the pushing chamber (7) is located at the bottom of the mixing chamber (6), the connecting gap (8) is arranged between the mixing chamber (6) and the pushing chamber (7), the longitudinal section of the mixing chamber (6) and the pushing chamber (7) is circular structure, and the diameter of the pushing chamber (7) is smaller than that of the mixing chamber (6); The mixing chamber (6) is internally provided with the transversely arranged stirring shaft (9), the main body of the stirring shaft (9) is provided with multiple groups of the T-shaped paddle (10) arranged at equal intervals; The pushing chamber (7) is internally provided with the transversely arranged pushing shaft (12), and the main body of the pushing shaft (12) is provided with the spiral (4).

2. A high speed premixing device for alkali treatment of cellulose according to claim 1, characterized in that: The stirring shaft (9) is rotationally connected with the mixing shell (5), and one end of the stirring shaft (9) is connected with the stirring reduction motor (11) outside the mixing shell (5).

3. A high speed premixing device for alkali treatment of cellulose according to claim 2, characterized in that: The pushing shaft (12) is arranged in parallel with the stirring shaft (9), the pushing shaft (12) is rotationally connected with the mixing shell (5), and one end of the pushing shaft (12) is connected with the pushing reduction motor (13) outside the mixing shell (5).

4. A high speed premixing device for alkali treatment of cellulose according to claim 3, characterized in that: The pushing reduction motor (13) and the stirring reduction motor (11) are located at the same end outside of the mixing shell (5).

5. A high speed premixing device for alkali treatment of cellulose according to claim 1, characterized in that: The adjacent two groups of paddles (10) are arranged in a staggered manner.

6. A high speed premixing device for alkali treatment of cellulose according to claim 1, characterized in that: The mixing chamber (6) is provided with the pulp inlet (1) above, and the two sides of the pulp inlet (1) are respectively provided with the solvent inlet (2).

7. A high speed premixing device for alkali treatment of cellulose according to claim 1, characterized in that: One end of the pushing chamber (7) is provided with the discharge port (3) below, and the discharge valve is arranged on the discharge port (3).

8. A high speed premixing device for alkali treatment of cellulose according to claim 1, characterized in that: The mixing shell (5) is fixedly provided with multiple supporting legs (14) at the bottom, and the top of the supporting leg (14) is fixedly connected with the outer wall of the mixing chamber (6).

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