A lyocell production plant
By eliminating the post-feeder and improving the structure of the second dryer, the problem of high maintenance costs of the post-feeder was solved, achieving the effects of reducing production costs and ensuring smooth fiber transport.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ASIA SYMBOL SHANDONG PULP & PAPER
- Filing Date
- 2025-08-18
- Publication Date
- 2026-07-21
AI Technical Summary
In existing Lyocell production equipment, the high maintenance and repair costs of the post-feeder result in persistently high production costs.
The post-feeder is eliminated, and the downstream equipment of the first post-processing component (second dryer) is directly connected to the upstream equipment of the second post-processing component (second fiber feeder) and the fine cotton opener through the pipeline. The structure of the second dryer is improved by using an inclined wall to guide the fiber flow to the discharge port, combined with the liquid inlet pipe and air blowing pipe to assist fiber conveying.
This reduces the maintenance costs of production equipment while ensuring smooth fiber transport and improving production efficiency.
Smart Images
Figure CN224531136U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of lyocell fiber production technology, and in particular to a lyocell production device. Background Technology
[0002] Lyocell is a regenerated cellulose fiber made from renewable plant fibers, characterized by its environmental friendliness, comfort, and superior performance. In the Lyocell production process, wood pulp and other raw materials are first dissolved, filtered, and degassed in the raw material workshop to create a uniform and stable spinning solution. This solution then undergoes spinning, winding, washing, and cutting to become short fibers. These short fibers are then processed in the first post-processing unit before being directly fed into the fine opening machine to become ordinary fibers. Alternatively, after processing in the first post-processing unit, they are first fed into the second post-processing unit, where a cross-linking agent solution is added to induce a cross-linking reaction before being fed into the fine opening machine to become cross-linked fibers.
[0003] Current Lyocell production equipment includes a post-feeder between the first and second post-processing units, such as... Figure 5 As shown, the feed hopper of the post-feeder has an inclined sidewall 01 on one side, and the discharge port 02 is located on the side opposite to the inclined sidewall 01. The post-feeder needs to lift the fiber and cross-linking agent solution to a relatively high height so that the fiber can be smoothly discharged from the discharge port. During the production process, it was found that the maintenance cost of the post-feeder is very high, with annual maintenance costs of approximately several hundred thousand yuan, resulting in high production costs for Lyocell.
[0004] Therefore, how to reduce the production cost of lyocell is a technical problem that needs to be solved by those skilled in the art. Utility Model Content
[0005] This application provides a lyocell production equipment, the production equipment including a cutting machine and downstream of the cutting machine: a first post-processing component, a second post-processing component and a fine cotton opener, the downstream device of the first post-processing component is a second dryer, the upstream device of the second post-processing component is a second fiber feeder, and the second dryer is directly connected to the second fiber feeder and the fine cotton opener through a pipeline.
[0006] The second dryer includes a discharge hopper, the sidewall of which includes two opposing inclined wall portions and two opposing connecting wall portions connected between the two inclined wall portions. The two inclined wall portions are inclined in opposite directions, and the lower regions of the two inclined wall portions are inclined toward each other. One of the connecting wall portions has a discharge port in its lower region.
[0007] In one alternative embodiment of the Lyocell production equipment, the second dryer includes an inlet pipe, with at least one inlet pipe provided on each of the two inclined wall portions, and the outlet of the inlet pipe located above the upper region of the inclined wall portion on the same side.
[0008] In one alternative embodiment of the Lyocell production equipment, the second dryer includes air blowing pipes, with at least one air blowing pipe on each of the two inclined wall portions, and the air outlet of the air blowing pipes being located above the upper region of the inclined wall portion on the same side.
[0009] In one alternative embodiment of the lyocell production equipment, the second dryer includes a receiving box, the lower end of which is located inside the discharge hopper, through which incoming material can fall into the discharge hopper, and one side of the receiving box is provided with an openable side door.
[0010] In one alternative embodiment of the Lyocell production equipment, the second dryer includes an openable cover, with one cover on each of the two inclined walls, the cover being connected between the side wall of the receiving box and the side wall of the discharge hopper and located above the liquid inlet pipe and the air blowing pipe on the same side.
[0011] In one alternative embodiment of the lyocell production equipment, the first post-processing component is arranged on the upper floor slab, the second post-processing component is arranged on the lower floor slab, the pipeline includes a main pipeline, a first branch pipeline and a second branch pipeline, the first branch pipeline is provided with a first valve, the second branch pipeline is provided with a second valve, the first branch pipeline is connected to the second fiber feeding trough, and the second branch pipeline is connected to the fine cotton opening machine.
[0012] In one optional embodiment of the Lyocell production equipment, the vertical distance between the center of the material discharge port and the upper floor slab is H1, where H1 is greater than 400mm.
[0013] In one optional embodiment of the Lyocell production equipment, the first branch pipe includes a first inclined pipe section, the second branch pipe includes a second inclined pipe section, the main pipe, the first inclined pipe section and the second inclined pipe section are all located above the upper floor slab, the main pipe is inclined relative to the upper floor slab so that the downstream end of the main pipe is lower than the upstream end, and the first inclined pipe section and the second inclined pipe section are inclined relative to the upper floor slab so that the downstream end of the first inclined pipe section and the second inclined pipe section is lower than the upstream end.
[0014] In one alternative embodiment of the Lyocell production equipment, the vertical distance between the downstream end of the first inclined pipe section and the upper floor slab is H2, where H2 is less than 300mm.
[0015] In one alternative embodiment of the Lyocell production equipment, the vertical distance between the downstream end of the second inclined pipe section and the upper floor slab is H3, where H3 is greater than H2.
[0016] This application eliminates the post-feeder, replacing it with a direct pipeline connection between the downstream device of the first post-processing unit (the second dryer) and the upstream device of the second post-processing unit (the second fiber feeder), as well as between the dryer and the fine cotton opener. This eliminates the high maintenance costs of the post-feeder, thus reducing production costs. Simultaneously, after eliminating the post-feeder, this application improves the structure of the second dryer to ensure smooth fiber transport. After the fibers enter the hopper, the two inclined walls simultaneously guide the fiber flow to the lower area where the discharge port is located. Compared to the previous method of placing the discharge port on the side opposite the inclined sidewalls, the fibers can enter the discharge port more quickly and smoothly, ensuring smooth discharge even without the boosting effect of the post-feeder. Attached Figure Description
[0017] Figure 1 A block diagram of the Lyocell production equipment provided in this application;
[0018] Figure 2 for Figure 1 Front view of the second dryer in the middle;
[0019] Figure 3 for Figure 2 The left view;
[0020] Figure 4 This is a schematic diagram showing the route of the main pipeline, the first branch pipeline, and the second branch pipeline.
[0021] Figures 1-4 The annotations in the accompanying drawings are explained as follows:
[0022] 100 preprocessing components;
[0023] 101 Spinning machine, 102 Winding machine, 103 Washing machine, 104 Cutting machine;
[0024] 200 First Post-Processing Components;
[0025] 201 First fiber feeding trough, 202 First refining mill, 203 First wet cotton opener, 204 First wet feeder, 205 First dryer, 206 First feeder, 207 Second dryer, 2071 Discharge hopper, 2071a Inclined wall, 2071b Connecting wall, 2071c Discharge port, 2072 Liquid inlet pipe, 2073 Air blowing pipe, 2074 Receiving box, 2074a Side door, 2075 Cover plate, 2076 Discharge pipe, 2077 Machine base, 2078 Baffle;
[0026] 300 Second Post-Processing Component;
[0027] 301 Second fiber feeder, 302 Second refining mill, 303 Second wet cotton opener, 304 Second wet feeder, 305 Third dryer, 306 Second feeder, 307 Fourth dryer;
[0028] 400 pipe;
[0029] 401 Main pipe, 402 First branch pipe, 402a First inclined pipe section, 402b First vertical pipe section, 403 Second branch pipe, 403a Second inclined pipe section, 403b Second vertical pipe section;
[0030] 500 fine cotton opener; 600 fiber conveyor; 700 cotton conveying fan; 800 baler; 900 first valve; 1000 second valve.
[0031] Figure 5 This is a schematic diagram of the discharge hopper of a traditional rear feeder.
[0032] Figure 5 The reference numerals in the attached drawings are explained as follows: 01 inclined sidewall, 02 material discharge port. Detailed Implementation
[0033] This application provides a lyocell production device. In order to enable those skilled in the art to better understand the technical solution of this application, the technical solution of this application will be further described in detail below with reference to the accompanying drawings and specific embodiments.
[0034] like Figure 1 As shown, in this embodiment, the Lyocell production equipment includes a pre-processing component 100, a first post-processing component 200, and a second post-processing component 300.
[0035] The pretreatment component 100 is provided with a spinning machine 101, a winding machine 102, a washing machine 103 and a cutting machine 104 in sequence from upstream to downstream. The spinning solution is extruded through the spinneret of the spinning machine 101 to form filamentous nascent fibers, which are then wound into a cylinder by the winding machine 102, and then the washing machine 103 removes residual solvents and other impurities. Finally, the cutting machine 104 cuts the filaments into short fibers.
[0036] The first post-processing component 200 is provided with, from upstream to downstream, a first fiber feeding trough 201, a first refining machine 202, a first wet opening machine 203, a first wet feeder 204, a first dryer 205, a first feeder 206, and a second dryer 207. Short fibers are opened in the first fiber feeding trough 201 by an aeration device at the bottom, then impurities are removed and the fiber surface properties are improved by the first refining machine 202, then opened again by the first wet opening machine 203, then evenly fed into the first dryer 205 by the first wet feeder 204 for preliminary drying, and finally opened again by the first feeder 206 and evenly fed into the second dryer 207 for secondary drying.
[0037] If producing ordinary fibers, the fibers coming out of the second dryer 207 go directly into the fine cotton opener 500. After being opened and sorted by the fine cotton opener 500, they go into the baler 800 for baling.
[0038] If cross-linked fibers are being produced, the fibers exiting the second dryer 207 enter the second post-processing assembly 300. The second post-processing assembly 300 is provided with, from upstream to downstream, a second fiber feeder 301, a second refining machine 302, a second wet cotton opener 303, a second wet feeder 304, a third dryer 305, a second feeder 306, and a fourth dryer 307. The fibers from the second dryer 207, mixed with the crosslinking agent solution, first enter the second fiber feeding tank 301. In the second fiber feeding tank 301, they are opened by the aeration device at the bottom. Then, they pass through the second refining machine 302 to remove impurities and improve the surface properties of the fibers. Next, they are opened by the second wet opener 303. Then, they are evenly fed into the third dryer 305 for preliminary drying by the second wet feeder 304. After being opened by the second feeder 306, they are evenly fed into the fourth dryer 307 for secondary drying. Then, they are conveyed to the fine opener 500 by the fiber conveyor 600 and the cotton conveying fan 700. After being opened and sorted by the fine opener 500, they enter the baler 800 for baling.
[0039] like Figure 1 As shown, the downstream device of the first post-processing component 200 (the second dryer 207) is directly connected to the upstream device of the second post-processing component 300 (the second fiber feeder 301) via a pipe 400, and the downstream device of the first post-processing component 200 (the second dryer 207) is directly connected to the cotton opening machine 500 via a pipe 400.
[0040] Previously, a post-feeder was installed between the downstream device of the first post-processing component 200 (the second dryer 207) and the upstream device of the second post-processing component 300 (the second fiber feeder 301). This post-feeder was also located between the downstream device of the first post-processing component 200 (the second dryer 207) and the cotton opener, relying on the post-feeder to increase the head and ensure smooth fiber transport. However, the high maintenance cost of the post-feeder led to high production costs.
[0041] This application eliminates the post-feeder and instead connects the downstream device of the first post-processing component 200 (the second dryer 207) to the upstream device of the second post-processing component 300 (the second fiber feeder 301), as well as to the fine cotton opener 500, directly via pipes 400. This eliminates the high maintenance costs of the post-feeder and thus reduces production costs.
[0042] Meanwhile, in order to ensure smooth fiber transport after eliminating the rear feeder, this application has improved the structure of the second dryer 207: such as... Figure 2 and Figure 3 As shown, the second dryer 207 is provided with a discharge hopper 2071. The side wall of the discharge hopper 2071 includes two oppositely arranged inclined wall portions 2071a and two oppositely arranged connecting wall portions 2071b connected between the two inclined wall portions 2071a. The two inclined wall portions 2071a are inclined in opposite directions, and the lower regions of the two inclined wall portions 2071a are inclined in a direction that approaches each other. The lower region of one of the connecting wall portions 2071b is provided with a discharge port 2071c.
[0043] When the second dryer 207 adopts the above structure, after the fiber enters the discharge hopper 2071, the two inclined wall sections 2071a can simultaneously guide the fiber flow to the lower area where the discharge port 2071c is located. Compared with the previous setting of the discharge port on the side opposite to the inclined side wall, the fiber can enter the discharge port 2071c more quickly and smoothly, ensuring smooth discharge even without the rear feeder increasing the lifting height.
[0044] Specifically, in the illustrated embodiments, such as Figure 2 As shown, the two inclined wall portions 2071a have the same slope, which facilitates molding. Alternatively, the two inclined wall portions 2071a can have different slopes. The angle α between the two inclined wall portions 2071a and the horizontal plane is preferably greater than 20°, for example, it can be set to 24°. Figure 3 As shown, the two connecting wall portions 2071b are vertical walls; alternatively, the two connecting wall portions 2071b can also be inclined. For example... Figure 2 and Figure 3As shown, a discharge pipe 2076 is provided at the discharge port 2071c, and a flange is provided at the end of the discharge pipe 2076 away from the discharge port 2071c to facilitate connection to the pipe 400. The second dryer 207 includes a base 2077, and the discharge hopper 2071 is fixed on the base 2077.
[0045] Specifically, in the illustrated embodiments, such as Figure 2 and Figure 3 As shown, the second dryer 207 also includes a liquid inlet pipe 2072, and the side where the two inclined wall portions 2071a are located ( Figure 2 At least one liquid inlet pipe 2072 is provided on each of the left and right sides (as shown in the figure). Two liquid inlet pipes 2072 are provided on each side. Alternatively, one or more liquid inlet pipes 2072 can be provided on each side. The outlet of the liquid inlet pipe 2072 is located above the upper region of the inclined wall portion 2071a on the same side. In this way, during the production of cross-linked fibers, the cross-linking agent solution can enter from the liquid inlet pipes 2072 on both sides and then flow along the two inclined walls 2071a, flushing the fibers and facilitating smooth fiber transport.
[0046] Specifically, in the illustrated embodiments, such as Figure 2 and Figure 3 As shown, the second dryer 207 also includes an air blowing pipe 2073, on the side where the two inclined walls 2071a are located ( Figure 2 At least one air blowing pipe 2073 is provided on each of the left and right sides (as shown in the figure). Alternatively, two or more air blowing pipes 2073 can be provided on each side. The air outlet of the air blowing pipe 2073 is located above the upper area of the inclined wall portion 2071a on the same side. In this way, when producing cross-linked fibers or ordinary fibers, air can be blown from the air blowing pipes 2073 on both sides into the feed hopper 2071, which helps the fibers flow along the two inclined walls 2071a and facilitates smooth fiber transport.
[0047] Specifically, in the illustrated embodiments, such as Figure 2 As shown, the two inclined wall portions 2071a are located on the side ( Figure 2 Both sides of the middle section are equipped with baffles 2078. The baffles 2078 guide the airflow and liquid flow, prevent fiber accumulation, and block flying fibers from entering the area where the liquid inlet pipe 2072 and the air blowing pipe 2073 are located, reducing the chance of blockage of the liquid inlet pipe 2072 and the air blowing pipe 2073.
[0048] Specifically, in the illustrated embodiments, such as Figure 2 and Figure 3As shown, the second dryer 207 includes a receiving box 2074, the lower end of which is located inside the discharge hopper 2071. Incoming materials can fall into the discharge hopper 2071 through the receiving box 2074. One side of the receiving box 2074 is provided with an openable side door 2074a. After the side door 2074a is opened, the interior of the discharge hopper 2071 can be inspected and cleaned, and any blockages in the discharge hopper 2071 can be cleared promptly. In the figure, the lower end of the side door 2074a is hinged to the connecting wall 2071b of the discharge hopper 2071 where the discharge port 2071c is located. The side door 2074a can be opened by rotating up and down. Alternatively, the side door 2074a can also be configured to open by rotating left and right or as a sliding door.
[0049] Specifically, in the illustrated embodiments, such as Figure 2 As shown, the second dryer 207 includes an openable cover 2075 and two inclined walls 2071a on the side ( Figure 2 A cover plate 2075 is provided on each of the left and right sides of the material receiving box 2074 and the side wall of the discharge hopper 2071. The cover plate 2075 is located above the liquid inlet pipe 2072 and the air blowing pipe 2073 on the same side. The liquid inlet pipe 2072 and the air blowing pipe 2073 can be inspected and cleaned by opening the cover plate 2075.
[0050] Specifically, in some embodiments, the first post-processing component 200 is arranged on the upper floor slab, and the second post-processing component 300 is arranged on the lower floor slab. For example... Figure 4 As shown, the pipeline 400 includes a main pipeline 401, a first branch pipeline 402, and a second branch pipeline 403. A first valve 900 is installed on the first branch pipeline 402, and a second valve 1000 is installed on the second branch pipeline 403. The first branch pipeline 402 is connected to the second fiber feeding trough 301, and the second branch pipeline 403 is connected to the fine cotton opening machine 500. When producing cross-linked fibers, the first valve 900 is opened and the second valve 1000 is closed. When producing ordinary fibers, the second valve 1000 is opened and the first valve 900 is closed. For example, the first valve 900 can be a slide gate valve, and the second valve 1000 can be a gate valve, which satisfies the process requirements while keeping the configuration cost relatively low.
[0051] The vertical distance between the center of the discharge port 2071c and the upper floor slab is H1, preferably greater than 400mm. This results in a large discharge head, which is more conducive to the smooth transport of fibers.
[0052] Specifically, in the illustrated embodiment, the first branch pipe 402 includes a first inclined pipe section 402a, and the second branch pipe 403 includes a second inclined pipe section 403a. The main pipe 401, the first inclined pipe section 402a, and the second inclined pipe section 403a are all located above the upper floor slab. The main pipe 401 is inclined relative to the upper floor slab, so that its downstream end is lower than its upstream end. The first inclined pipe section 402a is also inclined relative to the upper floor slab, so that its downstream end is lower than its upstream end. The second inclined pipe section 403a is also inclined relative to the upper floor slab, so that its downstream end is lower than its upstream end. This allows for further improvement in the smoothness of fiber transport by utilizing the inclination of the main pipe 401, the first inclined pipe section 402a, and the second inclined pipe section 403a.
[0053] The vertical distance between the downstream end of the first inclined pipe section 402a and the upper floor slab is H2, preferably less than 300mm. This results in a large discharge head, which is more conducive to the smooth transport of cross-linked fibers.
[0054] The vertical distance between the downstream end of the second inclined pipe section 403a and the upper floor slab is H3, preferably H3 is greater than H2. In this way, the downstream end of the second inclined pipe section 403a can avoid the water-blocking edge on the upper floor slab, reducing damage to the upper floor slab.
[0055] Specifically, in the illustrated embodiment, the first branch pipe 402 further includes a first vertical pipe section 402b, and the second branch pipe 403 further includes a second vertical pipe section 403b. The first vertical pipe section 402b is connected to the downstream end of the first inclined pipe section 402a and passes through the upper floor slab. The second vertical pipe section 403b is connected to the downstream end of the second inclined pipe section 403a and passes through the upper floor slab. Using vertical pipe sections to pass through the upper floor slab can reduce the hole area on the upper floor slab and facilitate construction.
[0056] The above examples illustrate the principles and implementation methods of this application. The descriptions of these embodiments are merely for the purpose of helping to understand the method and core ideas of this application. It should be noted that those skilled in the art can make various improvements and modifications to this application without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of this application.
Claims
1. A Lyocell production device, characterized in that, The production equipment includes a cutting machine and downstream of the cutting machine: a first post-processing component (200), a second post-processing component (300), and a fine cotton opener. The downstream device of the first post-processing component (200) is a second dryer (207), and the upstream device of the second post-processing component (300) is a second fiber feeder (301). The second dryer (207) is directly connected to the second fiber feeder (301) and to the fine cotton opener (500) through a pipeline. The second dryer (207) includes a hopper (2071), the sidewall of which includes two oppositely arranged inclined wall portions (2071a) and two oppositely arranged connecting wall portions (2071b) connected between the two inclined wall portions (2071a). The two inclined wall portions (2071a) are inclined in opposite directions, and the lower regions of the two inclined wall portions (2071a) are inclined in a direction that approaches each other. The lower region of one of the connecting wall portions (2071b) is provided with a discharge port (2071c).
2. The lyocell production equipment according to claim 1, characterized in that, The second dryer (207) includes an inlet pipe (2072), and at least one inlet pipe (2072) is provided on each side of the two inclined wall portions (2071a). The outlet of the inlet pipe (2072) is located above the upper region of the inclined wall portion (2071a) on the same side.
3. The lyocell production equipment according to claim 2, characterized in that, The second dryer (207) includes an air blowing pipe (2073), and at least one air blowing pipe (2073) is provided on each side of the two inclined wall portions (2071a). The air outlet of the air blowing pipe (2073) is located above the upper region of the inclined wall portion (2071a) on the same side.
4. The lyocell production equipment according to claim 3, characterized in that, The second dryer (207) includes a receiving box (2074), the lower end of which is located inside the discharge hopper (2071). The incoming material can fall into the discharge hopper (2071) through the receiving box (2074). The receiving box (2074) has an openable side door (2074a) on one side.
5. The lyocell production equipment according to claim 4, characterized in that, The second dryer (207) includes an openable cover plate (2075), with one cover plate (2075) on each side of the two inclined walls (2071a). The cover plate (2075) is connected between the side wall of the receiving box (2074) and the side wall of the discharge hopper (2071) and is located above the liquid inlet pipe (2072) and the air blowing pipe (2073) on the same side.
6. The lyocell production equipment according to any one of claims 1-5, characterized in that, The first post-processing component (200) is arranged on the upper floor slab, and the second post-processing component (300) is arranged on the lower floor slab. The pipeline includes a main pipeline (401), a first branch pipeline (402) and a second branch pipeline (403). The first branch pipeline (402) is provided with a first valve (900), and the second branch pipeline (403) is provided with a second valve (1000). The first branch pipeline (402) is connected to the second fiber feeding trough (301), and the second branch pipeline (403) is connected to the fine cotton opening machine (500).
7. The lyocell production equipment according to claim 6, characterized in that, The vertical distance between the center of the material discharge port and the upper floor slab is H1, where H1 is greater than 400mm.
8. The lyocell production equipment according to claim 6, characterized in that, The first branch pipe (402) includes a first inclined pipe section (402a), and the second branch pipe (403) includes a second inclined pipe section (403a). The main pipe (401), the first inclined pipe section (402a), and the second inclined pipe section (403a) are all located above the upper floor slab. The main pipe (401) is inclined relative to the upper floor slab, so that the downstream end of the main pipe (401) is lower than the upstream end. The first inclined pipe section (402a) and the second inclined pipe section (403a) are inclined relative to the upper floor slab, so that the downstream ends of the first inclined pipe section (402a) and the second inclined pipe section (403a) are lower than the upstream ends.
9. The lyocell production equipment according to claim 8, characterized in that, The vertical distance between the downstream end of the first inclined pipe section (402a) and the upper floor slab is H2, where H2 is less than 300mm.
10. The lyocell production equipment according to claim 9, characterized in that, The vertical distance between the downstream end of the second inclined pipe section (403a) and the upper floor slab is H3, where H3 is greater than H2.