CN210394600U - Device for preparing cellulose spinning slurry - Google Patents
Device for preparing cellulose spinning slurry Download PDFInfo
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- CN210394600U CN210394600U CN201920879511.3U CN201920879511U CN210394600U CN 210394600 U CN210394600 U CN 210394600U CN 201920879511 U CN201920879511 U CN 201920879511U CN 210394600 U CN210394600 U CN 210394600U
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- screw extruder
- feed inlet
- thick liquid
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- screw
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Abstract
The utility model provides a preparation cellulose spinning thick liquid device, includes twin-screw extruder, screw conveyer and gear pump, the one end of twin-screw extruder is equipped with the feed inlet, and the feed inlet includes first feed inlet and second feed inlet, second feed inlet and screw conveyer intercommunication, the discharge gate and the gear pump intercommunication of the twin-screw extruder other end, pressure rise gradually when thick liquid advances from the head to the afterbody in the screw extruder cavity, especially accelerate thick liquid homogeneous mixing under the effect of the great pressure in afterbody, and bubble wherein can be extruded for the thick liquid preparation process, shortened thick liquid preparation time, simple structure, convenient to use.
Description
Technical Field
The utility model relates to a thick liquid preparation facilities field of NMMO dissolved cellulose spinning especially relates to a preparation cellulose spinning thick liquid device.
Background
The spinning process for dissolving cellulose by NMMO is simple, the solvent can be recovered, and the method has no pollution to the environment. In use, the NMMO is applied in the form of a hydrate, wherein the NMMO monohydrate and the NMMO dihydrate are solid at normal temperature and liquid at high temperature, and can dissolve cellulose; the NMMO trihydrate and NMMO tetrahydrate are liquid at normal temperature and cannot dissolve cellulose; various NMMO hydrates are mutually converted along with different mass fractions of NMMO and water, and the cellulose fiber spinning is realized by utilizing the characteristic of NMMO. At high temperature (more than 85 ℃), NMMO is easy to decompose and discolor, and the decomposition and discoloration are more severe at higher temperature, which is unfavorable for spinning production.
Chinese patent CN106222771B "a method for preparing cellulose fiber" adopts an improved method to prepare cellulose fiber, but does not improve on equipment, and also adopts a common mixer when preparing cellulose spinning slurry, and the problem of the above appeal is also present, at high temperature (more than 85 ℃), NMMO is easy to decompose and discolor, and the decomposition and discoloration are more severe with higher temperature, which is unfavorable for spinning production.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a main aim at provides a preparation cellulose spinning thick liquid device, when solving high temperature (being greater than 85 ℃), the NMMO takes place to decompose easily, discolours, and the temperature is higher, decomposes, discolours and worsens more, to the unfavorable problem of spinning production.
In order to solve the technical problem, the utility model discloses the technical scheme who adopts is: the utility model provides a preparation cellulose spinning thick liquid device, includes twin-screw extruder, screw conveyer and gear pump, the one end of twin-screw extruder is equipped with the feed inlet, and the feed inlet includes first feed inlet and second feed inlet, second feed inlet and screw conveyer intercommunication, the discharge gate and the gear pump intercommunication of the twin-screw extruder other end, first feed inlet (8) and NMMO transfer line intercommunication.
In the preferred scheme, a belt scale is arranged between the second feeding hole and the screw conveyor.
In a preferable scheme, a liquid flowmeter is arranged on the first feeding hole.
In a preferable scheme, the outer wall of the double-screw extruder is provided with a heating sleeve.
In a preferable scheme, an exhaust port is arranged at the position, close to the discharge port, of the double-screw extruder.
The utility model provides a preparation cellulose spinning slurry device, carry the inside mixing of double screw extruder with moisture less than 15% NMMO and pulp powder, the stirring, swell gradually, dissolve and form the thick liquid, carry the gear pump again, the gear pump carries the service unit to the thick liquid as required, because gear pump 5's restraint, pressure rises gradually when thick liquid moves ahead from head to afterbody in the double screw extruder cavity, especially accelerate thick liquid homogeneous mixing under the effect of the great pressure of afterbody, wherein bubble can be in being extruded, accelerate thick liquid preparation process, the thick liquid preparation time has been shortened, and thick liquid is used not to save while making, when solving high temperature (being greater than 85 ℃), NMMO takes place the decomposition easily, discolour, and the temperature is higher, the decomposition, discolour more seriously, the unfavorable problem of production to the spinning.
Drawings
The invention will be further explained with reference to the following figures and examples:
FIG. 1 is a schematic diagram of the overall system of the present invention;
FIG. 2 is a schematic view of the twin screw extruder of the present invention;
in the figure: a screw conveyor 1; a belt scale 2; a liquid flow meter 3; a twin-screw extruder 4; a gear pump 5; a heating jacket 6; a discharge port 7; a first feed port 8; a second feed opening 9; an exhaust port 10.
Detailed Description
Example 1
As shown in fig. 1-2, a device for preparing cellulose spinning slurry comprises a double-screw extruder 4, a screw conveyor 1 and a gear pump 5, wherein one end of the double-screw extruder 4 is provided with a feed port, the feed port comprises a first feed port 8 and a second feed port 9, the second feed port 9 is communicated with the screw conveyor 1, a discharge port 7 at the other end of the double-screw extruder 4 is communicated with the gear pump 5, so that the first feed port 8 is used for conveying NMMO liquid, the second feed port 9 is used for conveying pulp powder, the double-screw extruder 4 adopts a co-rotating conjugated double screw, the co-rotating conjugated double screw is used for enhancing the stirring strength and the extrusion strength of the slurry, due to the constraint of the gear pump 5, the pressure is gradually increased when the slurry moves from the head to the tail in the cavity of the double-screw extruder 4, particularly, the slurry is, the air bubbles can be extruded out, the preparation process of the slurry is accelerated, the preparation time of the slurry is shortened, and the slurry is not stored while being prepared, so that the structure is simple and the use is convenient.
In the preferable scheme, a belt scale 2 is arranged between the second feeding hole 9 and the screw conveyor 1, has a simple structure, and is used for recording the weight of pulp powder conveyed.
In the preferred scheme, the first feed inlet 8 is provided with the liquid flowmeter 3, has a simple structure, and is used for recording the metering of the NMMO liquid.
In the preferred scheme, the outer wall of the double-screw extruder 4 is provided with the heating sleeve 6, the structure is simple, the temperature of NMMO fed into the system is controlled to be higher than 85 ℃, and the problems that the NMMO is easy to decompose and change color when the temperature is high (higher than 85 ℃), and the decomposition and color change are more severe and are unfavorable for spinning production are solved.
In the preferred scheme, the double-screw extruder 4 is divided into four sections of feeding, mixing, swelling and dissolving according to functions, and the shape of each section of screw is changed and is different.
In the preferred scheme, the double-screw extruder 4 is provided with the exhaust port 10 at the upper part of the cavity in the middle of the mixing section, the structure is simple, in order to exhaust gas in slurry, the exhaust port 10 is arranged at the upper part of the cavity in the middle of the mixing section of the double-screw extruder 4, and the exhaust port has the functions of observation hole and emergency slurry discharge in case of failure.
Example 2
Further described with reference to example 1, as shown in fig. 1 to 2, NMMO is prepared as NMMO having a moisture content of less than 15%, the heating jacket 6 on the outer wall of the twin-screw extruder 4 is heated to 85 to 95 °, the NMMO fed into the system is made as NMMO having a moisture content of less than 15% and a temperature of more than 85 ℃, the temperature condition for preparing the slurry is satisfied, and the problems that the NMMO is easily decomposed and discolored at a high temperature (more than 85 ℃), and the decomposition and discoloration are more severe at a higher temperature, which is disadvantageous to the spinning production, are solved.
NMMO is measured by a liquid flow meter 3 and then is input into a double-screw extruder 4, a screw conveyor 1 conveys pulp powder to a belt weigher 2 for weighing and also is input into the double-screw extruder 4 after weighing, the NMMO and pulp powder are mixed and stirred by screws in a cavity of the double-screw extruder 4, gradually swell and dissolve to form slurry, the slurry is conveyed to a gear pump 5, the gear pump 5 conveys the slurry to a using unit according to requirements, due to the constraint of the gear pump 5, the pressure of the slurry is gradually increased when the slurry moves forwards from a head part to a tail part in the cavity of the double-screw extruder 4, particularly, the uniform mixing of the slurry is accelerated under the action of larger pressure at the tail part, bubbles in the slurry can be extruded, the preparation process of the slurry is accelerated, the preparation time of the.
The above-mentioned embodiments are merely preferred embodiments of the present invention, and should not be considered as limitations of the present invention, and the protection scope of the present invention should be defined by the technical solutions described in the claims, and includes equivalent alternatives of technical features in the technical solutions described in the claims. Namely, equivalent alterations and modifications within the scope of the invention are also within the scope of the invention.
Claims (5)
1. The utility model provides a preparation cellulose spinning thick liquid device which characterized by: including twin-screw extruder (4), screw conveyer (1) and gear pump (5), the one end of twin-screw extruder (4) is equipped with the feed inlet, and the feed inlet includes first feed inlet (8) and second feed inlet (9), second feed inlet (9) and screw conveyer (1) intercommunication, discharge gate (7) and gear pump (5) intercommunication of the twin-screw extruder (4) other end, first feed inlet (8) and NMMO transfer line intercommunication.
2. The apparatus of claim 1, wherein: and a belt scale (2) is arranged between the second feeding hole (9) and the screw conveyor (1).
3. The apparatus of claim 1, wherein: and a liquid flowmeter (3) is arranged on the first feeding hole (8).
4. The apparatus of claim 1, wherein: and a heating sleeve (6) is arranged on the outer wall of the double-screw extruder (4).
5. The apparatus of claim 1, wherein: an exhaust port (10) is arranged at the position of the double-screw extruder (4) close to the discharge port (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920879511.3U CN210394600U (en) | 2019-06-12 | 2019-06-12 | Device for preparing cellulose spinning slurry |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920879511.3U CN210394600U (en) | 2019-06-12 | 2019-06-12 | Device for preparing cellulose spinning slurry |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210394600U true CN210394600U (en) | 2020-04-24 |
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ID=70349260
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920879511.3U Active CN210394600U (en) | 2019-06-12 | 2019-06-12 | Device for preparing cellulose spinning slurry |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210394600U (en) |
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2019
- 2019-06-12 CN CN201920879511.3U patent/CN210394600U/en active Active
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