CN113308923B

CN113308923B - Pulp homogenizing and conditioning system for preparing Lyocell fibers

Info

Publication number: CN113308923B
Application number: CN202110592895.2A
Authority: CN
Inventors: 刘迪; 张敏喆; 董建忠; 杨鸣; 王开仕
Original assignee: Beijing Sanlian Hope Shin Gosen Technical Service Co
Current assignee: Beijing Sanlian Hope Shin Gosen Technical Service Co
Priority date: 2021-05-28
Filing date: 2021-05-28
Publication date: 2022-06-10
Anticipated expiration: 2041-05-28
Also published as: CN113308923A

Abstract

The invention relates to a pulp homogenizing and tempering system for preparing Lyocell fibers. The homogenizing and conditioning system comprises: the generator is provided with a flow guide chamber, a static pressure chamber, a feeding hole and a discharging hole; the conveying device is used for driving the materials to move along the direction of the feed port towards the discharge port; the ultrasonic device is arranged in the static pressure chamber; the air guide device is communicated with the flow guide chamber; the static pressure chamber is communicated with an exhaust pipe. Therefore, the crystalline structure of cellulose can be effectively opened, the water content in the Lyocell pulp can be uniform, the humidity and the temperature of the cellulose pulp are distributed in a narrow range, the humidity and the temperature of the cellulose pulp can be flexibly adjusted due to the change of the capacity or the external conditions, and the elasticity of the device is improved. Thus, the content of undissolved cellulose particles in the stock solution is low, and the stock solution reaches the first-grade standard, so that the high-quality Lyocell cellulose stock solution with uniform quality is formed.

Description

Pulp homogenizing and conditioning system for preparing Lyocell fibers

Technical Field

The invention relates to the field of Lyocell fiber production equipment, in particular to a pulp homogenizing and tempering system for preparing Lyocell fibers.

Background

Lyocell fibers are fibers obtained by mixing an aqueous solution of a solvent (e.g., N-methylmorpholine-N-oxide (NMMO)) with cellulose pulp, and then subjecting the mixture to sufficient swelling and evaporation under reduced pressure to dissolve and spin the mixture. Due to the characteristics of environmental protection and no pollution, the Lyocell fiber has become a new development direction of the cellulose fiber.

Among these, the preparation of a cellulose dope is critical to the formation of a high quality product. In the production process, natural cellulose fibers are adopted as raw materials, and the natural cellulose is often extracted from renewable fast-growing trees and other crops.

Because of the nature of the raw material, natural cellulose has many crystalline regions which are difficult to swell, cellulose molecular chains are intertwined, hydrogen bonds between cellulose molecules are difficult to open effectively only by soaking in alkali liquor, and the use of cellulase has a large influence on the polymerization degree of the raw material, thereby causing insufficient swelling of cellulose, low accessibility of the surface of cellulose fiber, and difficult solvent entering the interior of cellulose crystals to perform a dissolution reaction, and thereby forming a large number of undissolved cellulose particles in the stock solution. And when the number of undissolved particles in each square centimeter in the spinning solution is more than 15, the spinning solution is unqualified.

In addition, differences among cellulose batches and fluctuation of the water content of the cellulose after pressing treatment have great influence on the formation of the Lyocell stock solution due to the nonuniformity of the water content, waste discharge treatment is required once unqualified spinning solution is formed, continuous production of the process cannot be maintained, and great economic loss is brought by solvent recycling and raw material waste.

Therefore, it is important to continuously and stably produce high-quality Lyocell fibers from Lyocell fibers that the cellulose is sufficiently swelled to open the natural crystalline regions of the cellulose and to adjust the uniformity of the cellulose pulp before mixing with the solvent.

The cellulose pulp is prepared by a traditional wet method, the cellulose pulp is swelled by adopting an alkali liquor method or under the action of cellulase, and after excessive moisture in swelled cellulose is squeezed by a squeezer, the swelled cellulose is mixed with a high-concentration solvent and enters a reactor to prepare a cellulose stock solution. However, the conventional cellulose swelling process has the following problems: firstly, a large amount of moisture is introduced, and the energy consumption problem of repeated evaporation exists; secondly, the crystallization area is difficult to open only by the action of alkali liquor or cellulase, so that insoluble cellulose particles are finally formed; thirdly, the fluctuation of the water content of the pressed Lyocell pulp and the heterogeneity of the water content have great influence on the formation of subsequent Lyocell stock solution.

For the above reasons, it is difficult to form a uniform mixture after mixing natural cellulose with a solvent, and a Lyocell dope formed after passing through a reactor is not high in quality, is not uniform in quality, and is difficult to continuously and stably produce. In view of the above, a more reasonable solution is needed to solve the problem that it is difficult to prepare a uniform cellulose stock solution by the conventional wet method.

Disclosure of Invention

The invention aims to provide a pulp homogenizing and tempering system for preparing Lyocell fibers, which solves the problem that cellulose pulp with uniform quality is difficult to prepare by a traditional wet method.

In order to achieve the above object, the present invention provides a pulp homogenizing and tempering system for producing Lyocell fiber, comprising:

the generator is provided with a flow guide chamber and a static pressure chamber communicated with the flow guide chamber, wherein a feed inlet for introducing materials and a discharge outlet for discharging the materials are respectively arranged on the generator and positioned in the static pressure chamber;

the conveying device is used for driving the materials to move along the direction from the feed port to the discharge port;

the ultrasonic device is arranged in the static pressure chamber and is used for activating the material; and

the air guide device is used for guiding gas, and is communicated with the flow guide chamber so that the gas can act on the material on the conveying device after entering the static pressure chamber; the static pressure chamber is communicated with an exhaust pipe for exhausting gas.

In one possible design, the homogenization and conditioning system further comprises a rectifying device for homogenizing the gas, located in the static pressure chamber and connected to the generator;

and/or the air guide device comprises a fan and a heater, and the fan is connected with the generator through an air pipe; the heater is arranged in the diversion chamber and used for heating the introduced gas.

In one possible embodiment, the intake opening of the static pressure chamber is located above the conveying device, and the flow-straightening device is arranged between the intake opening of the static pressure chamber and the conveying device.

In one possible embodiment, the intake opening of the static pressure chamber is located below the conveying device, and the flow-straightening device is arranged between the intake opening of the static pressure chamber and the conveying device.

In one possible design, the generator is configured in a plurality, and each generator is provided with the conveying device, the ultrasonic device and the air guide device correspondingly;

wherein the air inlet of the static pressure chamber in at least one generator is positioned above the conveying device, and the rectifying device is arranged between the air inlet of the static pressure chamber and the conveying device; the air inlet of the static pressure chamber in at least one generator is positioned below the conveying device, and the rectifying device is arranged between the air inlet of the static pressure chamber and the conveying device.

In one possible design, the conveying device comprises a driver, a driving wheel, a driven wheel and a transmission belt, wherein the transmission belt is respectively wound on the driving wheel and the driven wheel, and the driver is in transmission connection with the driving wheel to drive the transmission belt to move;

preferably, a plurality of air holes are formed in the transmission belt;

furthermore, the opening area of the air holes is 30-50% of the total area of the transmission belt.

In one possible design, the homogenization and conditioning system further comprises a flexible seal connected to the generator for filling the gap between the static pressure chamber and the belt of the conveying device;

preferably, the flexible seal is a rubber block;

preferably, the flexible seal is a brush;

preferably, the flexible seal is configured as a combination of a rubber block and a brush, wherein the rubber block is connected at one end to the generator and at the other end to the brush.

In one possible design, the homogenizing and tempering system further comprises a microwave device for performing microwave treatment on the derived material, wherein the microwave device is arranged below the discharge opening so that the material can pass through a working area of the microwave device when falling;

preferably, the microwave device comprises a microwave emitter, a microwave generator and a shielding and protecting cover; the microwave generator is internally provided with a through hole for materials to pass through, and the microwave emitter is connected with the microwave generator; the shielding protective cover is arranged on the periphery of the microwave generator;

further, the extending direction of the through hole is parallel to the gravity direction; and/or the cross section of the through hole is square.

In one possible design, the homogenizing and tempering system further comprises a feeding device for conveying material to the conveying device;

preferably, the feeding device comprises a hopper, a discharging chute, a rocker arm and a motor, wherein a discharging port of the hopper is communicated with the discharging chute; one end of the rocker arm is connected to the blanking chute, and the other end of the rocker arm is in transmission connection with the motor so as to drive the blanking chute to move through the rotation of the motor;

furthermore, the feeding device comprises a supporting arm, one end of the supporting arm is connected with the rocker arm, and the other end of the supporting arm is connected with the discharging chute;

further, the blanking chute is obliquely arranged, and the inclination angle of the blanking chute is larger than the minimum repose angle of the material.

In one possible design, the homogenization and conditioning system further comprises:

the detection device is used for detecting the current information of the material, and the current information of the material at least comprises humidity and temperature;

the second detection device is used for detecting the current information of the hot gas, and the current information of the hot gas at least comprises temperature, humidity and flow rate; and

and the controller is respectively in communication connection with the detection device, the second detection device, the conveying device and the air guide device so as to control the conveying device and/or the air guide device to execute corresponding actions according to the received information of the current moisture content and the hot air.

Through above-mentioned technical scheme, not only can effectively open the hydrogen bond of cellulose, promptly, make the crystallization zone of cellulose further opened, and simultaneously, can also get rid of the moisture in the material, introduce the problem of moisture when having avoided traditional wet process preparation cellulose pulp, can also stabilize the humidity of cellulose pulp, and the temperature makes the humidity of cellulose pulp, temperature distribution in a narrower scope, and the humidity of cellulose pulp, temperature can also carry out nimble adjustment because the change of productivity or external condition, the elasticity of device has been increased. Therefore, the content of undissolved cellulose particles in the stock solution is low, and the primary standard is reached. Therefore, the cellulose stock solution with uniform quality is formed, and the quality of the product is ensured.

Additional features and advantages of the invention will be set forth in the detailed description which follows.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

FIG. 1 is a schematic structural view of a pulp homogenizing and conditioning system for producing Lyocell fibers in one embodiment of the present invention;

FIG. 2 is a schematic structural view of another embodiment of the pulp homogenizing and conditioning system for Lyocell fiber production provided by the present invention;

FIG. 3 is a schematic structural view of a pulp homogenizing and conditioning system for Lyocell fiber production in accordance with another embodiment of the present invention.

Description of the reference numerals

1-a generator, 11-a diversion chamber, 12-a static pressure chamber, 2-a conveying device, 21-a driving wheel, 22-a driven wheel, 23-a transmission belt, 3-an ultrasonic device, 4-an air guiding device, 5-an exhaust pipe, 6-a microwave device, 61-a microwave emitter, 62-a microwave generator, 63-a shielding protective cover, 7-a feeding device, 71-a hopper, 72-a blanking chute, 73-a rocker arm, 74-a motor, 75-a supporting arm, 8-a reversing pipe and 9-a rectifying device.

Detailed Description

The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.

In the present invention, the terms of orientation such as "upper, lower, left, right" used in the case where no description is made to the contrary generally refer to the upper, lower, left, right in the case where the homogenization and conditioning system provided by the present invention is used normally. The inner and outer parts refer to the inner and outer parts of the corresponding part contour. "distal" or "proximal" refers to a state of relative proximity or distance and does not refer to distance or proximity in a particular physical quantity. In addition, it should be noted that terms such as "and" second "are used herein to distinguish one element from another, and are not necessarily sequential or significant.

According to an embodiment of the present invention, a pulp homogenizing and conditioning system for producing Lyocell fibers is provided, which is capable of homogenizing and conditioning pulp. In which figures 1 to 3 show different embodiments thereof.

Referring to fig. 1 to 3, the homogenizing and conditioning system includes a generator 1, a conveying device 2, an ultrasonic device 3, and an air guide device 4. The generator 1 is provided with a diversion chamber 11 and a static pressure chamber 12 communicated with the diversion chamber 11. Wherein, a feed inlet for introducing materials and a discharge outlet for discharging materials are respectively arranged on the generator 1 and at the position of the static pressure chamber 12. The conveying device 2 is used for driving the materials to move along the direction of the material inlet towards the material outlet. And the ultrasonic device 3 is arranged in the static pressure chamber 12 and is used for activating the materials. The air guide device 4 is used for guiding air so that the air can act on the material on the conveying device 2 after entering the static pressure chamber 12; the air guiding device 4 is communicated with the air guiding chamber 11, and the static pressure chamber 12 is communicated with an exhaust pipe 5 for exhausting gas.

In this way, the conveyor means 2 can transport the material into the generator 1, so that the material is subjected to an activation treatment by the ultrasonic means 3. The introduced gas enters the static pressure chamber 12 through the flow guide chamber 11, so that the homogenization and the thermal refining of the material are promoted, meanwhile, the introduced gas can also take away certain moisture in the cellulose, and the working load of the wiped film evaporator used in the subsequent process is reduced.

Through above-mentioned technical scheme, not only can effectively open the hydrogen bond of cellulose, promptly for the crystallization zone of cellulose is further opened, simultaneously, can also get rid of the moisture in the material, can also stabilize the humidity of cellulose pulp, and the temperature makes the humidity of cellulose pulp, temperature distribution in a narrower scope, and the humidity of cellulose pulp, temperature can also carry out nimble adjustment owing to the change of productivity or external conditions, have increased the elasticity of device. Therefore, the content of undissolved cellulose particles in the stock solution is low, and the stock solution can reach the first-level standard, so that the cellulose stock solution with uniform quality is formed, and the quality of the product is ensured. The following table 1 is a quality evaluation standard of the cellulose stock solution.

The following examples were conducted in accordance with the criteria of Table 1 for judging the grade of raw Lyocell cellulose solution.

TABLE 1 evaluation basis for Lyocell cellulose dope

Number of undissolved cellulose particles/cm²	Rank of
		0-5	1
6-10	2
		11-15	3
＞15	Is not suitable for spinning

In one embodiment of the present disclosure, the homogenizing and conditioning system further comprises a rectifying device 9 for homogenizing the gas, the rectifying device 9 being located in the static pressure chamber 12 and connected to the generator 1. Therefore, the airflow can be uniformly divided through the rectifying device 9, so that the airflow can fully and uniformly contact with the material, and the homogenization effect of the material is ensured.

Specifically, the rectifying device 9 includes an airflow distribution plate, which is provided with a plurality of air holes and is detachably connected to the generator 1, and after entering the static pressure chamber 12, the airflow can pass through the air holes and then act on the material of the conveying device 2, so that the airflow can be uniformly and sufficiently acted on the material to ensure the homogenization quality of the cellulose (i.e. the material herein) on one hand, and on the other hand, the material can be prevented from being separated from the conveying device 2 due to excessive local wind pressure.

Wherein, the connection part of the static pressure chamber 12 and the exhaust pipe 5 (namely, the air outlet of the static pressure chamber) is also provided with a complete air purification device, thereby trapping fine pulp materials in the static pressure chamber 12 and preventing the air flow from taking away the fine pulp materials. Thus, the air cleaning device can be removably attached to the generator 1 for ease of installation and maintenance.

In one embodiment of the present disclosure, the gas flow distributor plate is made of stainless steel material to allow it to be adapted to some high temperature and high pressure applications. In other embodiments, the gas flow distribution plate may also be made of a high temperature resistant ceramic material, which is not limited by the present invention.

On the basis of this, a centrifugal fan can be added, which can pressurize the introduced material to quickly and reliably act on the material, ensure the homogenization effect of the cellulose and is beneficial to smoothly discharging the gas from the static pressure chamber 12.

In addition, as the exhaust duct 5, a duct made of a stainless material may be disposed. Therefore, the installation and the cleaning can be convenient, the device can adapt to the working environments under different conditions, and has better practicability.

In a specific embodiment, the air guiding device 4 comprises a fan and a heater, the fan is connected to the generator 1 through an air pipe, and the heater is arranged in the air guiding chamber 11, so that the introduced air is heated, the temperature of the air flow is increased, and the homogenization efficiency and the homogenization quality of the material are ensured.

At the same time, by heating the gas, the moisture content of the gas stream can be reduced, thereby better carrying away the moisture in the cellulose.

In one embodiment of the present disclosure, the blower may be disposed outside the generator 1, so as to reduce the occupation of the internal space of the generator 1.

In particular, the fan may be a conventional fan capable of directing an air flow towards the generator 1. And the heater can be a heat exchanger (such as a shell-and-tube heat exchanger and a finned tube heat exchanger) or an electric heater (such as a mica heating plate). In this regard, the skilled person can bring conventional modifications to the prior art.

It should be understood that, for the term "and/or" as may appear herein, it is merely an associative relationship that describes an associated object, meaning that there may be three relationships, e.g., a and/or B, may mean: a exists alone, B exists alone, and A and B exist at the same time; for the term "/and" as may appear herein, which describes another associative object relationship, it means that two relationships may exist, e.g., a/and B, may mean: a exists independently, and A and B exist independently; in addition, for the character "/" that may appear herein, it generally means that the former and latter associated objects are in an "or" relationship.

For example, in the present disclosure, the rectifying device 9 may be present alone, the air guide device 4 that heats the gas may be present alone, or both the rectifying device 9 and the air guide device 4 that can heat the gas may be present.

In one embodiment, as shown in fig. 1, the intake opening of the static pressure chamber 12 is located above the conveyor 2, and the flow straightener 9 is arranged between the intake opening of the static pressure chamber 12 and the conveyor 2. In this case, the gas first contacts the upper material on the conveyor 2 and then contacts the lower material on the conveyor 2, whereby an effective homogenization of the material is achieved in this way from the top to the bottom. The exhaust duct 5 can now communicate with the lower part of the static pressure chamber 12 as a result of the gas moving down as a whole, thereby assisting the gas in being discharged out of the static pressure chamber 12 under the effect of pressure.

In some application scenarios, for example, in the case of hot gas, since the hot gas rises, the air inlet is disposed above the conveying device 2, and the residence time of the hot gas in the static pressure chamber 12 can be increased, which is beneficial to make the gas fully contact with the material, and thus, the homogenization efficiency is improved.

Under the technical idea, as an option, referring to fig. 1, the diversion chamber 11 may be disposed above the static pressure chamber 12, and the lower region of the diversion chamber 11 may be configured to have a cross-sectional area gradually decreasing along the gravity direction, so as to increase the pressure of the gas when the gas enters the static pressure chamber 12, thereby increasing the flow rate of the gas, enabling the gas to act on the material quickly and effectively, and further ensuring the homogenization effect.

In another embodiment, as shown in fig. 2, the intake opening of the static pressure chamber 12 is located below the conveyor 2, and the fairing 9 is arranged between the intake opening of the static pressure chamber 12 and the conveyor 2. In this case, the gas first contacts the lower material layer on the conveyor 2 and then the upper material layer on the conveyor 2, whereby an effective homogenization of the material is achieved in this way from below and above.

Since the gas moves upward as a whole, the exhaust duct 5 can be communicated with the upper part of the static pressure chamber 12, so that the gas can be smoothly exhausted to the static pressure chamber 12 by the pressure.

Under this technical concept, as an alternative to this embodiment, the guiding chamber 11 can be arranged above the static pressure chamber 12 and connected to the static pressure chamber 12 below by the diverting tube 8, so that the gas contacts the material from the right to the top. In this case, the lower region of the baffle chamber 11 can be provided with a structure whose cross-sectional area decreases gradually in the direction of gravity, which is beneficial for increasing the pressure of the gas when it enters the reversing tube 8, so that the gas is rapidly introduced into the static pressure chamber 12 through the reversing tube 8, and at the same time, the pressure of the gas when it enters the static pressure chamber 12 is ensured, so that the gas can sufficiently contact the material.

Specifically, the reversing tube 8 may include a vertical section and a bent tube section. Wherein, one end of the vertical section is communicated with the second diversion chamber 11, and the other end is communicated with the bent pipe section. And the bent pipe section is communicated with the lower part of the static pressure chamber, so that the gas can flow upwards. In order to ensure the connection strength, the vertical section and the bent pipe section are integrally formed.

Further, the reversing tube 8 may be made of a stainless steel material, thereby ensuring a life span of the reversing tube 8 and adapting the reversing tube 8 to various application environments.

Furthermore, the upper region of the static pressure chamber 12 may be configured such that the cross-sectional area decreases in the direction from bottom to top, which helps the gas to converge at the top of the static pressure chamber 12 and be smoothly discharged through the exhaust duct 5.

As an alternative to this embodiment, the flow guide chamber 11 may be disposed below the static pressure chamber 12 to smoothly guide the introduced gas into the static pressure chamber 12 to promote homogenization of the material. Therefore, the air guide device can conform to the flow direction of air, and the work load of the air guide device 4 is reduced.

In still another embodiment, the generator 1 is provided in plurality, and each generator 1 is provided with a conveying device 2, an ultrasonic device 3, and an air guide device 4. Wherein, the air inlet of the static pressure chamber 12 in at least one generator 1 is positioned above the conveying device 2, and the rectifying device 9 is arranged between the air inlet of the static pressure chamber 12 and the conveying device 2; at least one inlet opening of the static pressure chamber 12 of the generator 1 is located below the conveyor 2, and the flow straightener 9 is arranged between the inlet opening of the static pressure chamber 12 and the conveyor 2.

Therefore, the gas can be acted on the material from top to bottom, and can also be acted on the material from bottom to top, so that the treatment range and the homogenization degree of the material are further increased, the microstructure of the cellulose (namely the material in the text) can be uniformly swelled, and the uniformity of the cellulose stock solution is improved.

It should be noted that "at least" in this context means two or more generators 1.

For example, in the present application, the number of generators 1 is 2, as shown in the drawing of fig. 3, one of the generators 1 with the downward airflow direction is arranged on the left side, and the other generator 1 with the upward airflow direction is arranged on the right side, so that the material is treated in a segmented manner and is reversed, and the final homogenization effect of the material is ensured.

In other embodiments, one of the generators 1 with the upward airflow direction may be disposed on the left side, and the other generator 1 with the downward airflow direction may be disposed on the right side.

Of course, the generators 1 may also be configured in any suitable number, such as three or six, for example, and those skilled in the art can flexibly set the number and the positions of the generators 1 according to actual needs.

In a specific embodiment, the conveying device 2 may include a driver, a driving wheel 21, a driven wheel 22 and a transmission belt 23, wherein the transmission belt 23 is respectively wound around the driving wheel 21 and the driven wheel 22, and the driver is in transmission connection with the driving wheel 21 to drive the transmission belt 23 to move, so as to transport the material.

In order to facilitate the hot gas to act better on the material, the belt 23 is provided with a plurality of air holes. Thus, the hot gas can fully contact the cellulose, not only can promote the hydrogen bond of the cellulose to be opened, but also is beneficial to taking away the moisture in the material, and is convenient for subsequent processing.

In one embodiment of the present disclosure, the wind hole may be configured as a circular hole having a size of 2.5mm to 10 mm.

In order to ensure the gas circulation efficiency, the open area of the air holes on the transmission belt 23 is 30-50% of the total area of the transmission belt 23.

In one embodiment of the present disclosure, the open area of the air holes in the belt 23 is 40% of the total area of the belt 23.

Further, the belt 23 may be made of a stainless steel material so as to be suitable for some environments of high temperature and high pressure and to ensure a life span of the belt 23.

In addition, the surface of the belt 23 should be a smooth surface free of burrs, the smoothness of which is required to be not less than R0.3, in order to prevent cellulose from accumulating or sticking.

In one embodiment of the present disclosure, the homogenizing and conditioning system further comprises a flexible sealing member connected to the generator 1 for filling the gap between the static pressure chamber 12 and the transmission belt 23, so as to not only achieve a certain sealing effect, but also enable the material to be evenly spread on the conveying device 2 and prevent the material (pulp) from being accumulated.

Alternatively, the flexible seal may be configured as a rubber block, whereby the air flow is blocked by the rubber block and material build-up on the conveyor belt 23 of the conveyor 2 is scraped off by the rubber block.

Alternatively, the flexible seal may also be configured as a brush, whereby the air flow is blocked by the brush and the material build-up on the belt 23 of the conveyor 2 is scraped off by the brush.

As a further alternative, the flexible seal may also be configured as a combination of a rubber block and a brush, in particular, the rubber block being connected to the generator 1 at one end and to the brush at the other end. The air flow is thereby blocked jointly by the rubber blocks and the brushes, and the material deposits on the belt 23 of the conveyor device 2 are scraped off by the brushes.

Referring to fig. 1, in an embodiment of the present disclosure, the homogenizing and tempering system further includes a microwave device 6 for performing microwave processing on the exported material, thereby further ensuring the homogenizing effect of the material.

Specifically, the microwave device 6 includes a microwave emitter 61, a microwave generator 62, and a shield cover 63. Wherein, the microwave generator 62 is provided with a through hole for passing the material (i.e. cellulose), and the microwave emitter 61 is connected to the microwave generator 62. Thus, the microwave generator 62 acts to assist the cellulose in opening the hydrogen bonds as the material is circulated.

The shielding and protecting cover 63 is arranged on the periphery of the microwave generator 62, so that materials can be prevented from overflowing, and a certain protecting effect is achieved.

Wherein, the extending direction of the through hole is parallel to the gravity direction. Thus, after the material falls from the discharge opening, the material can pass through the material channel under the action of gravity. The cross-sectional shape of through-hole is square, can make the material fall into the through-hole completely, avoids the material to spill and causes the wasting of resources.

In one embodiment of the present disclosure, a plurality of microwave generators 62 are uniformly distributed around the through hole, such that the working range of the microwave generators 62 completely covers the transverse cross section of the through hole, thereby homogenizing the material more thoroughly.

As an option, the shielding protection cover 63 is configured to be a stainless steel net with 4-6 mm filtering holes, so that the falling channel of the material can be wrapped, and the material is prevented from overflowing.

In addition, an access window can be arranged on the stainless steel net. For ease of operation, the access panel latch may be hard interlocked with the microwave unit 6 and may be opened when the microwave launcher 61 is in a shut down condition.

In one embodiment of the present disclosure, the shielding protection cover 63 may be configured as a stainless steel mesh with 5mm filter holes, and a square access panel is disposed on the stainless steel mesh, and the access panel has a specification of 500mm by 500 mm.

Referring to fig. 1 to 3, the shielding protection cover 63 is further communicated with the exhaust duct 5 through a pipeline, so that the gas in the shielding protection cover 63 can be led out through the exhaust duct. And the structure is compact, and the optimal utilization of space is realized. In addition, as for the shape and structure of the pipeline, the pipeline can be flexibly arranged according to actual conditions, and the pipeline in fig. 1 to 3 is only shown by way of example.

In a specific embodiment disclosed by the invention, the homogenizing and tempering system further comprises a feeding device 7, and the discharge end of the feeding device 7 is positioned above the conveying device 2, so that the automatic supply of the materials is realized, an automatic production line is formed, and the integral homogenizing efficiency of the materials is improved.

In one embodiment of the present disclosure, the feeding device 7 includes a hopper 71, a feeding chute 72, a swing arm 73, and a motor 74, wherein a discharge port of the hopper 71 is connected to the feeding chute 72. One end of the rocker arm 73 is connected to the discharging chute 72, and the other end of the rocker arm 73 is in transmission connection with the motor 74, so that the rocker arm 73 is driven to move by the movement of the motor 74, and then the discharging chute 72 is indirectly driven to move, so that the materials are uniformly laid on the conveying device 2. The flow speed and flow rate of the material during blanking can be controlled by controlling the swing amplitude and swing speed of the motor 74, and the operation parameters of the equipment can be flexibly set by those skilled in the art according to actual requirements.

The position of the motor 74 may be set on the ground, may be set on the mounting seat, or may be set on any other suitable base, and those skilled in the art can flexibly set the position according to the application environment, so that the detailed description thereof will not be provided.

In addition, the feeding device 7 further comprises a supporting arm 75, one end of the supporting arm 75 is connected to the rocker arm 73, and the other end of the supporting arm 75 is connected to the discharging chute 72, so that the stability of the discharging chute 72 in the discharging process is improved, and the materials can be uniformly laid on the conveying device 2.

In one embodiment of the present disclosure, the feeding chute 72 is disposed obliquely, and the inclination angle of the feeding chute 72 is greater than the minimum repose angle of the material, so that the material can be uniformly laid on the transmission belt of the conveying device.

It should be noted that the repose angle refers to the maximum angle at which the material (i.e., cellulose) is kept in a natural, stable state. Once the angle is formed, the bulk material is piled up, and the piled bulk material naturally slides down and maintains the angle. So, along with the transport of material, the material of piling up can naturally slide down to other positions to make the material can keep certain height, and along with conveyor 2's removal tiling on conveyor 2's drive belt 23, guarantee the uniformity of material homogenization degree.

In one embodiment of the present disclosure, the contact portion of the generator 1 and the conveying device 2 is provided with a rounded corner to prevent the pulp from depositing at the dead angle.

In one embodiment of the present disclosure, the homogenizing and conditioning system may further include a detecting device, a second detecting device, and a controller.

The detection device is used for detecting the current information of the material, and the current information of the material at least comprises humidity and temperature; the second detection device is used for detecting the current information of the hot air, and the current information of the hot air at least comprises temperature, humidity and flow rate; and the controller is respectively in communication connection with the detection device, the second detection device, the conveying device 22 and the air guide device 44 so as to respectively control the conveying device 22 and/or the air guide device 44 to execute corresponding actions according to the received information of the materials and the hot air.

From this, realize the real-time detection to the material to adjust and control conveyor 2's functioning speed according to the data that detect, be of value to the dwell time and the bed thickness of adjusting the material, then be convenient for the effective of material homogenization work to go on. And through the adjustment of controller to air ducting 4, then can in time adjust the temperature, humidity and the velocity of flow of steam to make material homogenization work can go on high-efficiently, realized intelligent control.

The detection device, the second detection device, the conveying device 2, the air guide device 4 and the controller may transmit data through wireless transmission protocols such as bluetooth and WiFi, or may transmit data through a communication cable or the like.

Specifically, the detection means includes a humidity sensor and a temperature sensor. In this way, the operating states of the air guiding device 4 and the conveying device 2 can be adjusted inversely according to the actual conditions of different materials. In other embodiments, the current information for the material may also include hardness. Under this condition, detection device can also include pressure sensor on this basis to carry out real-time supervision to the hardness of material, improve and acquire the current situation of material comprehensively accurately.

The second detection device comprises a second humidity sensor, a second temperature sensor and a wind speed sensor, so that the current hot gas information is accurately acquired, and then the information is fed back to the controller, and the running state of the air guide device 4 is reversely adjusted.

In one embodiment of the present disclosure, the detection device and the second detection device may be configured in plurality, thereby improving accuracy of current information on the material and the hot gas.

For the controller, it may be an integrated circuit chip with signal processing capability. In implementation, the above functions may be performed by integrated logic circuits of hardware in the controller or instructions in the form of software. The controller may also be a general-purpose Processor, including a Central Processing Unit (CPU), a Network Processor (NP), and the like; but also Digital Signal Processors (DSPs), Application Specific Integrated Circuits (ASICs), Field Programmable Gate Arrays (FPGAs) or other Programmable logic devices, discrete Gate or transistor logic devices, discrete hardware components. In this regard, the skilled person can bring conventional modifications to the prior art.

The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, however, the present invention is not limited to the specific details of the above embodiments, and various simple modifications can be made to the technical solution of the present invention within the technical idea of the present invention, and these simple modifications are within the protective scope of the present invention.

It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the invention. The invention is not described in detail in order to avoid unnecessary repetition.

In addition, any combination of the various embodiments of the present invention is also possible, and the same should be considered as the disclosure of the present invention as long as it does not depart from the spirit of the present invention.

Claims

1. A pulp homogenizing and conditioning system for producing Lyocell fibers, comprising:

the generator (1) is provided with a flow guide chamber (11) and a static pressure chamber (12) communicated with the flow guide chamber (11), wherein a feed inlet for introducing materials and a discharge outlet for discharging the materials are respectively arranged on the generator (1) and at the position of the static pressure chamber (12);

the conveying device (2) is used for driving the materials to move along the direction from the feeding hole to the discharging hole;

the ultrasonic device (3) is arranged in the static pressure chamber (12) and is used for carrying out activation treatment on the materials; and

the air guiding device (4) is used for guiding gas, wherein the air guiding device (4) is communicated with the flow guiding chamber (11) so that the gas can act on the material on the conveying device (2) after entering the static pressure chamber (12); the static pressure chamber (12) is communicated with an exhaust pipe (5) for exhausting gas.

2. The pulp homogenizing and conditioning system for producing Lyocell fibers according to claim 1, characterized in that it further comprises a rectifying device (9) for homogenizing gas, said rectifying device (9) being located in the static pressure chamber (12) and connected to the generator (1);

and/or the air guide device (4) comprises a fan and a heater, and the fan is connected with the generator (1) through an air pipe; the heater is arranged in the diversion chamber (11) and used for heating the introduced gas.

3. The pulp homogenizing and conditioning system for producing Lyocell fibers according to claim 2, characterized in that the intake opening of the static pressure chamber (12) is located above the conveying device (2), and the flow straightening device (9) is arranged between the intake opening of the static pressure chamber (12) and the conveying device (2).

4. The pulp homogenizing and conditioning system for the production of Lyocell fibers according to claim 2, characterized in that the intake of the static pressure chamber (12) is located below the conveying device (2), the rectifying device (9) being arranged between the intake of the static pressure chamber (12) and the conveying device (2).

5. The pulp homogenizing and conditioning system for producing Lyocell fibers according to claim 2, characterized in that the generators (1) are configured in a plurality, and the conveying device (2), the ultrasonic device (3) and the air guiding device (4) are correspondingly arranged in each generator (1);

wherein the air inlet of the static pressure chamber (12) in at least one generator (1) is positioned above the conveying device (2), and the rectifying device (9) is arranged between the air inlet of the static pressure chamber (12) and the conveying device (2); the air inlet of the static pressure chamber (12) in at least one generator (1) is positioned below the conveying device (2), and the rectifying device (9) is arranged between the air inlet of the static pressure chamber (12) and the conveying device (2).

6. The pulp homogenizing and conditioning system for preparing Lyocell fibers according to any one of claims 1-5, wherein the conveying device (2) comprises a driver, a driving wheel (21), a driven wheel (22) and a transmission belt (23), wherein the transmission belt (23) is wound around the driving wheel (21) and the driven wheel (22), and the driver is in transmission connection with the driving wheel (21) to drive the transmission belt (23) to move.

7. The pulp homogenizing and conditioning system for producing Lyocell fibers according to claim 6, characterized in that the belt (23) is provided with a plurality of air holes.

8. The pulp homogenizing and conditioning system for producing Lyocell fibers of claim 7, wherein the open area of the air holes is 30% to 50% of the total area of the belt (23).

9. The pulp homogenizing and tempering system for the preparation of Lyocell fibers according to any of claims 1-5 further comprising a flexible seal connected to said generator (1) for filling the gap between said static pressure chamber (12) and the belt (23) of said conveying device (2).

10. The pulp homogenizing and conditioning system for producing Lyocell fibers of claim 9, wherein the flexible seal is a rubber block.

11. The pulp homogenizing and conditioning system for Lyocell fiber production of claim 9, wherein the flexible seal is a brush.

12. The pulp homogenizing and conditioning system for producing Lyocell fibers according to claim 9, characterized in that the flexible sealing element is configured as a combination of a rubber block and a brush, wherein the rubber block is connected to the generator (1) at one end and to the brush at the other end.

13. The pulp homogenizing and conditioning system for Lyocell fiber production according to any of claims 1-5, further comprising a microwave device (6) for microwave treatment of the derived material, wherein the microwave device (6) is disposed below the discharge outlet so that the material can pass through the working area of the microwave device (6) when falling.

14. The pulp homogenizing and tempering system for making Lyocell fiber according to claim 13, characterized in that the microwave device (6) comprises a microwave emitter (61), a microwave generator (62) and a shielded protective cover (63); a through hole for materials to pass through is formed in the microwave generator (62), and the microwave emitter (61) is connected to the microwave generator (62); the shielding and protecting cover (63) is arranged on the periphery of the microwave generator (62).

15. The pulp homogenizing and conditioning system for producing Lyocell fibers of claim 14, wherein the direction of extension of said through holes is parallel to the direction of gravity; and/or the cross section of the through hole is square.

16. The pulp homogenizing and tempering system for preparing Lyocell fibers according to any of claims 1-5, further comprising a feeding device (7) for delivering material to said conveying device (2).

17. The pulp homogenizing and conditioning system for producing Lyocell fibers according to claim 16, characterized in that the feeding device (7) comprises a hopper (71), a feeding chute (72), a rocker arm (73) and a motor (74), wherein the outlet of the hopper (71) is communicated with the feeding chute (72); one end of the rocker arm (73) is connected to the blanking chute (72), and the other end of the rocker arm is in transmission connection with the motor (74) so as to drive the blanking chute (72) to move through the rotation of the motor (74).

18. The pulp homogenizing and conditioning system for Lyocell fiber production according to claim 16, characterized in that the feeding device (7) comprises a support arm (75), the support arm (75) being connected to a rocker arm (73) at one end and to a feeding chute (72) at the other end.

19. The pulp homogenizing and conditioning system for Lyocell fiber production according to claim 17, characterized in that the feeding chute (72) is arranged inclined and the angle of inclination of the feeding chute (72) is greater than the minimum angle of repose of the material.

20. The pulp homogenizing and conditioning system for producing Lyocell fibers according to any one of claims 1-5, further comprising:

the second detection device is used for detecting the current information of the hot air, and the current information of the hot air at least comprises temperature, humidity and flow rate; and

the controller is respectively in communication connection with the detection device, the second detection device, the conveying device (2) and the air guide device (4) so as to control the conveying device (2) and/or the air guide device (4) to execute corresponding actions according to the received information of the current moisture content and the hot air.