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Device for preparing cellulose spinning slurry and preparation method thereof

A cellulose and slurry technology, applied in the field of slurry preparation equipment for NMMO dissolved cellulose spinning, can solve the problems of unfavorable spinning production, easy decomposition and discoloration of NMMO

Inactive Publication Date: 2019-09-20
当阳市鸿阳新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The main purpose of the present invention is to provide a device for preparing cellulose spinning slurry and its preparation method, to solve the problem that NMMO is prone to decomposition and discoloration at high temperature (greater than 85°C), and the higher the temperature, the more severe the decomposition and discoloration, which is harmful to spinning Disadvantages of silk production

Method used

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  • Device for preparing cellulose spinning slurry and preparation method thereof
  • Device for preparing cellulose spinning slurry and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Such as Figure 1~2 As shown, a device for preparing cellulose spinning slurry includes a twin-screw extruder 4, a screw conveyor 1 and a gear pump 5, and one end of the twin-screw extruder 4 is provided with a feed inlet, and the feed inlet includes The first feed port 8 and the second feed port 9, the second feed port 9 communicates with the screw conveyor 1, the discharge port 7 at the other end of the twin-screw extruder 4 communicates with the gear pump 5, With this structure, the first feed port 8 is used to transport NMMO liquid, the second feed port 9 is used to transport pulp powder, the twin-screw extruder 4 adopts co-rotating conjugated twin-screws, and the co-rotating conjugated twin-screws reinforce Due to the constraints of the gear pump 5, the pressure of the slurry gradually increases when the slurry moves from the head to the tail in the 4 cavities of the twin-screw extruder, especially when the slurry is accelerated under the action of a large pressure...

Embodiment 2

[0028] Further illustrate in conjunction with embodiment 1, as Figure 1~2 As shown, the NMMO is prepared to be NMMO with a moisture content of less than 15%, and the heating jacket 6 on the outer wall of the twin-screw extruder 4 is heated to 85°~95°, so that the NMMO sent into the system is NMMO with a moisture content of less than 15% and a temperature greater than 85°C. NMMO meets the temperature conditions for slurry preparation, and solves the problem that NMMO is prone to decomposition and discoloration at high temperatures (greater than 85°C), and the higher the temperature, the more severe the decomposition and discoloration, which is unfavorable to spinning production.

[0029] After the NMMO is measured by the liquid flow meter 3, it is input into the twin-screw extruder 4, and the screw conveyor 1 will transport the pulp powder to the belt scale 2 for weighing, and after weighing, it is also input into the twin-screw extruder 4, NMMO and pulp The powder is mixed an...

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Abstract

The invention discloses a device for preparing cellulose spinning slurry and a preparation method thereof. The device comprises a double-screw extruder, a screw conveyor and a gear pump, wherein a feeding hole is formed in one end of the double-screw extruder and comprises a first feeding hole and a second feeding hole, and the second feeding hole is communicated with the screw conveyor; and a discharge port at the other end of the double-screw extruder is communicated with the gear pump. When the slurry in the cavity of the screw extruder moves forwards from the head to the tail, the pressure is gradually increased; particularly, under the action of large pressure at the tail part, the uniform mixing of the slurry is accelerated, so that bubbles in the slurry are extruded out. The device can accelerate the slurry preparation process, shortens the slurry preparation time, and is simple in structure and convenient to use.

Description

technical field [0001] The invention relates to the field of slurry preparation devices for NMMO dissolved cellulose spinning, in particular to a device for preparing cellulose spinning slurry and a preparation method thereof. Background technique [0002] The NMMO dissolved cellulose spinning process is relatively simple, the solvent can be recycled, and there is no pollution to the environment. In use, NMMO is applied in the form of hydrate, wherein NMMO monohydrate and NMMO dihydrate are solid at normal temperature, liquid at high temperature, and can dissolve cellulose; NMMO trihydrate and NMMO tetrahydrate are at normal temperature It is liquid and cannot dissolve cellulose; various NMMO hydrates are transformed into each other with different mass fractions of NMMO and water. Cellulose fiber spinning is realized by using this characteristic of NMMO. At high temperature (greater than 85°C), NMMO is prone to decomposition and discoloration, and the higher the temperature...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21D1/02
CPCD21D1/02
Inventor 叶兆清叶小波吴永世崔在植廖建华胡志钢
Owner 当阳市鸿阳新材料科技有限公司
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