CN110886122A - Plant fiber cellulose purification device - Google Patents

Abstract

The invention relates to the technical field of purification, and discloses a plant fiber cellulose purification device, comprising a conveying pump for conveying plant fiber pulp, a flow channel for receiving materials from the conveying pump, a drainage structure connected to the outlet of the flow channel, and a screw extrusion The screw extruder is connected with the outlet of the liquid discharge mechanism; a heating pipe is arranged on the periphery of the flow channel. The whole process of the device from feeding slurry - dissolving hemicellulose and lignin - filtering liquid - extruding cellulose is automatic and continuous processing, and the purification efficiency is high; the flow channel is a spiral flow channel, which prolongs the pulp The overflow time of the material in the flow channel, coupled with the reaction-promoting effect of the ultrasonic generator, can completely dissolve the components such as hemicellulose and lignin.

Description

Plant fiber cellulose purification device

technical field

The invention relates to the technical field of purification, in particular to a plant fiber cellulose purification device.

Background technique

Plant fiber is a natural renewable resource, which is widely found in agricultural and forestry resources and its processing waste, and is often not fully utilized and is abandoned in nature as garbage. Many companies dispose of such waste biomass Fibers are used to be blended with thermoplastics and processed into wood-plastic composite profiles, which are used to replace traditional solid wood and plastic materials. However, in addition to a large amount of natural cellulose components, such plant fibers also contain a large amount of hemicellulose and pectin. , lignin and minerals, these components will affect the performance of composite materials, so that the performance of wood-plastic composite materials is limited, and it is difficult to continue to improve. As the main component of plant fibers, cellulose has higher strength and can be used to prepare composite materials with better properties. At the same time, this natural cellulose can also be used to prepare cellulose derivatives, such as methyl cellulose, hydroxypropyl methyl cellulose, hydroxyethyl cellulose, etc., and further used in medical treatment, building materials, high-strength composite materials, etc. field, and once again enhance the application value.

However, the traditional process of purifying cellulose components from plant fibers mostly uses chemical reagents to dissolve and remove components such as lignin and hemicellulose, and most of them are discontinuous processing with slow efficiency, and industrial production will cause serious pollution to the environment.

SUMMARY OF THE INVENTION

The technical problem solved by the present invention is to overcome the defects of the prior art and provide a plant fiber cellulose purification device with simple process and high degree of automation.

The object of the present invention is achieved through the following technical solutions:

A plant fiber cellulose purification device, comprising a conveying pump for conveying plant fiber pulp, a flow channel for receiving materials from the conveying pump, a liquid drain structure connected to the outlet of the flow channel, and a screw extruder. The outlet of the liquid mechanism is connected; the outer periphery of the flow channel is arranged with a heating tube.

Further, the flow channel is a spiral flow channel.

Further, the heating tube is a cylindrical heating tube wrapped around the outer periphery of the flow channel.

Further, an ultrasonic generator is also installed on the outer periphery of the heating tube.

Further, the drainage structure includes a channel for liquid to flow through, and a filter screen and a drainage port are provided at the bottom of the channel.

Further, the outer periphery of the screw extruder is provided with a heater.

Further, the screw extruder is a single screw extruder.

Compared with the prior art, the present invention has the following beneficial effects:

1) The whole process of the device from feeding pulp - dissolving hemicellulose and lignin and other components - filtering liquid - extruding cellulose is automatic and continuous processing, and the purification efficiency is high;

2) The flow channel is a spiral flow channel, which prolongs the overcurrent time of the slurry in the flow channel, and the reaction-promoting action of the ultrasonic generator can make the components such as hemicellulose and lignin dissolve completely;

3) The heating tube on the periphery of the flow channel can speed up the reaction between the treatment liquid and the hemicellulose and lignin in the plant fiber, and the heater on the periphery of the screw extruder can quickly evaporate the water in the cellulose to ensure purification. cellulose dryness.

Description of drawings

FIG. 1 is a schematic structural diagram of the plant fiber cellulose purification device described in Example 1. FIG.

Detailed ways

The present invention will be further described below in conjunction with the specific embodiments, wherein, the accompanying drawings are only used for exemplary description, and are only schematic diagrams, not physical drawings, and should not be construed as restrictions on this patent; in order to better illustrate the present invention In the embodiments, some components in the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product; it is understandable to those skilled in the art that some well-known structures and their descriptions in the drawings may be omitted.

Example 1

As shown in FIG. 1, a plant fiber cellulose purification device is provided, which includes a hopper 1, a conveying pump 2 for conveying plant fiber slurry, a flow channel 3 for receiving the incoming material from the conveying pump, and a drain connected to the outlet of the flow channel Structure and screw extruder 4, the feeding pipe 51 is connected between the hopper 1 and the conveying pump 2, the pumping pipe 52 is connected between the conveying pump 2 and the inlet of the flow channel 3, and the screw extruder 4 is connected with the outlet of the drainage mechanism connect. The extrusion end of the screw extruder 4 has a discharge port 41; wherein, a heating pipe 6 is arranged on the periphery of the flow channel 3 for heating the slurry to accelerate the reaction of the treatment liquid with the hemicellulose and lignin in the plant fiber. .

In order to dissolve the components such as hemicellulose and lignin as thoroughly as possible, the flow channel 3 is designed as a spiral flow channel, which can effectively prolong the over-flow time of the slurry in the flow channel. Promote the rapid influx of the treatment liquid into the plant fiber to further dissolve components such as hemicellulose and lignin.

The heating tube 6 is specifically a cylindrical heating tube that is completely wrapped around the outer circumference of the flow channel, so that the flow channel can be heated uniformly, and the slurry inside the flow channel is heated evenly.

A discharge pipe 53 is connected between the liquid discharge structure and the outlet of the flow channel 3. The liquid discharge structure includes a channel 81 for the liquid to flow through. The bottom of the channel is provided with a filter screen 82 and a liquid discharge port 83. The cellulose and liquid are mixed from the outlet. The material pipe 53 enters the channel 81 of the liquid discharge structure, and the liquid will be discharged from the liquid discharge port 83 through the filter screen 82 , leaving only the cellulose to enter the screw extruder 4 .

Because the cellulose coming out of the flow channel is relatively wet, it needs to be properly dried. A heater 9 can be arranged on the outer periphery of the screw extruder 4 to achieve the effect of drying the cellulose while extruding.

The screw extruder of this embodiment is a single screw extruder.

The process that adopts the plant fiber cellulose purification device of the present embodiment to carry out cellulose purification is as follows:

The slurry formed by treating the plant fibers with the treatment liquid is introduced into the hopper, and forced to be pumped into the spiral flow channel under the action of the conveying pump. The reaction of hemicellulose and lignin and other components, at the same time, the treatment liquid quickly pours into the plant fiber under the action of the ultrasonic generator, and deeply dissolves the hemicellulose and lignin and other components.

The plant fibers thoroughly treated by the treatment liquid in the spiral flow channel are quickly converted into high-purity fibers and discharged through the discharge pipe, and the liquid dissolved in hemicellulose and lignin is discharged from the discharge port through the filter screen;

The purified cellulose that still contains a certain amount of water enters the single-screw extruder. Under the heating action of the heater, the water in the cellulose is quickly evaporated and discharged, and the dried cellulose is discharged from the discharge port.

The device strengthens the dissolution of lignin, hemicellulose and other components in plant fibers by introducing an ultrasonic generator, and prolongs the treatment time of plant fibers through a spiral flow channel. The cellulose is dried and transported to complete the high-efficiency and high-quality purification and preparation of cellulose. The purity of the obtained cellulose can reach more than 95%, and the moisture content can be lower than 2%.

Obviously, the above-mentioned embodiments are only examples for clearly illustrating the technical solutions of the present invention, and are not intended to limit the embodiments of the present invention. For those of ordinary skill in the art, changes or modifications in other different forms can also be made on the basis of the above description. There is no need and cannot be exhaustive of all implementations here. Any modifications, equivalent replacements and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the claims of the present invention.

Claims (7)

1. a plant fiber cellulose purification device, is characterized in that, comprises the conveying pump of conveying plant fiber slurry, the flow channel that receives the incoming material of conveying pump, the drainage structure and the screw extruder that are connected with flow channel outlet, The screw extruder is connected with the outlet of the liquid discharge mechanism; the outer periphery of the flow channel is arranged with a heating pipe. 2 . The plant fiber cellulose purification device according to claim 1 , wherein the flow channel is a spiral flow channel. 3 . 3 . The plant fiber cellulose purification device according to claim 1 , wherein the heating pipe is a cylindrical heating pipe wrapped around the outer periphery of the flow channel. 4 . 4 . The plant fiber cellulose purification device according to claim 1 , wherein an ultrasonic generator is also installed on the periphery of the heating pipe. 5 . 5 . The plant fiber cellulose purification device according to claim 1 , wherein the drainage structure comprises a channel for liquid to flow through, and a filter screen and a drainage port are arranged at the bottom of the channel. 6 . 6 . The plant fiber cellulose purification device according to claim 1 , wherein a heater is provided on the periphery of the screw extruder. 7 . 7 . The plant fiber cellulose purification device according to claim 1 , wherein the screw extruder is a single screw extruder. 8 .

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