KR101925904B1 - Nano-cellulose fiber manufacturing system - Google Patents

Abstract

The present invention relates to a method for producing a high-quality nano-cellulose by mixing a cellulose raw material with water and decomposing it through chemical treatment, minimizing particle loss while recycling treatment water and catalyst several times during filtering and washing several times, The present invention relates to a nanocellulose fiber manufacturing system.

Description

[0001] NANO-CELLULOSE FIBER MANUFACTURING SYSTEM [0002]

The present invention relates to the production of nanocellulose. More particularly, the present invention relates to a method for producing nanocellulose, which comprises mixing a cellulose raw material with water and decomposing the same through water treatment, To a nano-cellulose fiber production system capable of producing a nanocellulose fiber with a high yield.

Nanotechnology (NT: nanotechnology) is a technology that obtains the desired characteristics by using specific characteristics of nano-sized particles. Recently, interest in environmentally friendly polymers has increased with active research of nanotechnology. This is an eco-friendly polymer that is a substitute for solving the environmental problems of conventional fossil fuel-based polymers. Of these natural polymers, cellulose accounts for the largest amount of organic matter on the earth.

Cellulosic fibers, which are natural materials that can be easily obtained on the earth, are not only excellent in high crystallinity, high strength, low linear expansion coefficient and chemical stability, but also are excellent in safety against living organisms due to their biodegradability, It has a strength comparable to that of carbon fiber, which is 1/5 of the weight of iron, and has a strength comparable to that of carbon fiber. It is used as a material in various fields such as functional filters, wiping materials, electronic device materials, medical materials, automobile interior materials, Has been applied.

Isolation methods for obtaining nanocellulose from cellulose can be roughly divided into chemical treatment and physical treatment. Chemical treatment methods include acid hydrolysis method of producing nano-sized cellulose by removing the amorphous region of cellulose by using strong acid. Physical methods include high intensity ultrasonic treatment, high pressure refiner treatment, grinder treatment, high pressure homogenizer treatment, In addition, the nanocellulose can be isolated using an enzyme.

At this time, a filtering operation for separating water from a liquid raw material containing cellulose is also performed. In general, a method of passing water only through a nanofilter to separate into a waste liquid is used. However, since the cellulose nanoparticles are often clogged with the filter, it has been pointed out that the delay and the troublesome processing are troublesome for removing the particles sticking to the filter.

In order to utilize the nano-cellulose thus obtained, nano-cellulose should be formed in powder form through drying. In order to utilize the nano-cellulose, the yield of nano-cellulose is inevitably lowered through such complicated processes. And it is cheaper than carbon fiber. However, it is pointed out that the cost is higher than that of general plastic filler and the price is formed. Therefore, it is required to secure low-cost processing technology.

Patent Registration No. 10-1550442 (Aug. 31, 2015)

Disclosure of Invention Technical Problem [8] Accordingly, the present invention has been made in view of the above problems, and it is an object of the present invention to provide a process for separating a cellulose raw material through a catalyst and minimizing the loss of nanocellulose particles during filtering and washing, The present invention also provides a nanocellulose fiber manufacturing system that enables efficient production of high-quality nanocellulose through continuous dispersion, drying, and modification.

In order to achieve the above object, the present invention provides a nanocellulose production system comprising: a first supply part and a second supply part, respectively, which are supplied with a cellulose raw material and water on the upper side; A first sensor part for sensing the pH of the internal raw material, and a second sensor part for detecting the pH of the raw material and a second sensor part for detecting the pH of the internal raw material, The first storage tank is connected to the first discharge pipe through the first discharge pipe and the first discharge valve, and the second storage unit is connected to the first storage tank through the first discharge pipe and the first discharge valve. Treatment tank; A filtering unit for filtering the primary treatment raw material stored in the first storage tank to separate the cellulose component and discharge the remaining treatment water; A treatment water tank which receives treated water discharged from the filtering unit and passes through a filter through which a catalyst component can pass and supplies the treated water through the third supply unit; A nanofabrication unit for decomposing the cellulose component separated by the filtering unit using ultrasound under a reduced pressure condition; A drying unit for drying the cellulose decomposed through the nanofibers to obtain nanocellulose particles; A reforming reaction unit for modifying the modification of the dried nanocellulose particles according to chemical substitution; .

The filtering unit may include a first filtering unit for filtering the primary treatment material stored in the first storage tank to separate the cellulose component into a secondary treatment material and discharging the remaining treatment water to the treatment water tank through a filter, A second storage tank for containing the secondary treatment raw material separated from the first filtering tank and having a water supply part for supplying water and a stirring part for stirring the raw material inside; A second filtering unit for separating the cellulose component into a tertiary treatment material and discharging the remaining treatment water through a filter; a water supply unit for containing the tertiary treatment material separated from the second filtering unit, A third storage tank having an agitator for agitating the third storage tank, and a third storage tank for storing the third storage raw material, And supplied to the remaining processing it can be made of a third filtering unit and, discharge tank for storing and discharging the treated water discharged from the unit and the second filtering section and a third filter for discharging through the filter.

In addition, the filtering unit may include a fourth supply unit for supplying the treatment material to the upper side surface, a filter installation unit configured to traverse the lower inner side, and a treatment material supply unit for supplying the treatment material through the second discharge pipe and the second discharge valve, A third sensor unit for measuring a pressure inside the filtration tank, and a second sensor unit for measuring a pressure inside the filtration tank, wherein the first sensor unit is connected to the first sensor unit, And a second pressure reducing valve connected to the first connection pipe through a second pressure reducing valve and a second pressure reducing valve so that selective depressurization is performed through the first pressure reducing pipe or the second pressure reducing pipe, And a second pressurizing valve connected to the first connecting pipe through a second pressurizing pipe and a second pressurizing valve. The first pressurizing pipe is connected to the first pressurizing pipe through a first pressurizing pipe and a first pressurizing valve, , The first pressurizing pipe or the second pressurizing pipe A pair of support plates provided in such a manner as to cut across the inside of the lower portion of the filtration tank along the filter installation portion and to have a plurality of holes, And a nano-filter disposed between the support plates. The first and second connection pipes are pressurized and the first connection pipe is depressurized and filtered, and the inside of the filtration tank is depressurized and depressurized in accordance with the detection result of the third sensor unit. And a control unit for pressing the first connection pipe side to clean the filtration unit.

In addition, the nano-forming unit may include a fifth supply unit for supplying the treatment material to the upper side, a second supply pipe connected to the second connection pipe having a third discharge valve for narrowing the lower center, A second decompression unit connected to the decompression tank through a third decompression pipe and a third decompression valve and having a decompressor for decompressing the inside of the decomposition tank; An amplification unit which is coupled with the oscillator and is located along the inside of the decomposition tank and whose side is protruded so as to perform ultrasonic amplification corresponding to the frequency, And an ultrasonic horn having protrusions protruding in a conical shape corresponding to a lower side of the decomposition tank and formed with helical grooves; And a fifth sensor unit for confirming the decomposition state of the nanocellulose of the raw material passing through the circulation pipe through the optical sensor, a circulation pipe for circulating the circulation pipe and the circulation pipe for sucking and circulating the circulation pipe through the second connection pipe into the decomposition tank, And a circulation unit provided in the circulation pipe and having a heat exchanger for cooling the circulating raw material; and a control unit for controlling the decompressor in accordance with the detection result of the fourth sensor unit, And a control unit for controlling the pump and the heat exchange unit.

In addition, the drying unit has a drying space formed therein, a supply port for supplying hot air to the upper side surface, an exhaust port for discharging hot air to the lower side surface, an exhaust port formed with the nanofilter, narrowed to the lower center, A second compressor for generating high-pressure air; and a drying pump for sucking the treatment material decomposed in the nanomonitoring unit and discharging the treated raw material through a high-pressure pump, A first nozzle for spraying the raw material discharged from the drying pump on the upper side of the drying space, a second nozzle surrounding the first nozzle for spraying high pressure air, And an impingement plate for dispersing a raw material to be sprayed by being positioned on the front surface of the first nozzle and the second nozzle; and a spraying unit for spraying the hot air, the second compressor, A driving and a first nozzle and the second nozzle of the emitter may be made of a control unit for controlling opening and closing.

By the present invention, the cellulose raw material is decomposed through the catalyst, and the treated water is recycled during the filtering and washing, thereby minimizing the number of nanocellulose particles, reducing the cost of recycling the treated water and the catalyst and achieving a high yield of nano- Efficient production can be achieved.

1 is a conceptual diagram of a system according to a preferred embodiment of the present invention;
2 is a cross-sectional view showing a treatment tank structure according to a preferred embodiment of the present invention,
3 is a cross-sectional view illustrating a structure of a filtering unit according to a preferred embodiment of the present invention,
FIG. 4 is a cross-sectional view illustrating a structure of a nanodevice according to a preferred embodiment of the present invention,
5 is a cross-sectional view illustrating a structure of a drying unit according to a preferred embodiment of the present invention.

Hereinafter, the structure of the nano-cellulose fiber manufacturing system of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a conceptual diagram of a system according to a preferred embodiment of the present invention, showing a schematic arrangement of a system reflecting a manufacturing process of a nanocellulose fiber according to the present invention, and includes a treatment tank 1 and a first storage tank 18 The production using the main components of the filtering section 2, the nanoizing section 3, the drying section 4 and the reforming reaction section 5 is performed.

2 is a cross-sectional view showing a treatment tank structure according to a preferred embodiment of the present invention.

The treatment tank 1 has a tubular structure that functions to treat pulp-type cellulose raw material through various chemicals such as catalysts. The treatment tank 1 is provided with a first supply portion 11 for receiving a pulp-type cellulose raw material on the upper side, And a second supply unit 12 to be supplied is connected.

The supply pump P is provided with the first medicine supply portion 191 containing the oxidant, the second medicine supply portion 192 containing the catalyst, and the third medicine supply portion 193 containing the acidity adjusting agent So that the oxidizing agent, the catalyst and the acidity adjusting agent can be supplied in a quantitative manner.

In order to supply the oxidizing agent, the catalyst, and the acidity controlling agent, which are respectively contained in the first, second, and third drug supply units 191, 192, and 193 to the treatment tank 1 in a homogeneous state, A stirring portion A may be provided. The stirring portion A has a known configuration including a rotating shaft formed vertically, a stirring blade formed on the rotating shaft, and a driving portion rotating the rotating shaft.

In the case of the oxidizing agent, the catalyst and the acidity adjusting agent, a known drug is used for producing the cellulose fiber. In order to prevent blurring of the present invention, a detailed description thereof will be omitted.

In addition, a third supply unit 13 is connected to the side surface of the treatment tank to receive the treatment water to be described later. The first sensor unit 14 senses the pH of the raw material contained therein and the first sensor unit 14 detects the level of the raw material. A second sensor unit 15 is provided and is controlled through a separate control unit so that the received raw material can always maintain the level and pH of the set range.

Similarly, there is provided an agitating part (A) for mixing raw materials in the treatment tank so that the raw materials supplied to the inside can be mixed with water, an oxidizing agent, a catalyst and an acidity adjusting agent smoothly, and sufficient reaction is performed by stirring for about 4 hours .

The treatment tank 1 is narrowed to the lower center and is connected to the first storage tank through a first discharge pipe 16 and a first discharge valve 17, And can be discharged and transferred to the storage tank 18.

The filtering unit 2 is configured to filter the primary treatment raw materials stored in the first storage tank 18 to separate the cellulose component and to discharge the remaining treatment water. For this purpose, various means for separating the cellulosic component from the primary treatment raw materials can be applied. For example, a centrifugal separation method in which the cellulosic raw material, impurities and treated water are separated using the specific gravity difference can be applied.

The treated water discharged from the filtering unit 2 is then stored in the treated water tank 216. The treated water stored in the treated water tank 216 passes through a microfilter MF through which a catalyst component can pass, And is supplied to the treatment tank 1 through the third supply unit 13 to be reused.

At this time, the filtering unit 2 includes a first filtering unit 211 and a second storage tank 214, a second filtering unit 212, a third storage tank 215, and a third filtering unit 213 Three times of filtering can be performed.

That is, the first filtering unit 211 filters the primary treatment raw material stored in the first storage tank 18 to separate the cellulose component into secondary treatment raw materials, and the remaining treated water is discharged to the treatment water tank 216 And is supplied to the treatment tank 1 through a microfilter MF and the second storage tank 214 receives secondary treatment raw materials separated from the first filtering unit 211, (W) and an agitating part (A) for agitating the raw material on the inside, so that the secondary treatment material is washed.

The second filtering unit 212 filters the secondary treatment material stored in the second storage tank 214 to separate the cellulose component into the tertiary treatment material and the remaining treatment water is discharged through the microfilter MF The third storage tank 215 receives the tertiary raw material separated from the second filtering unit 212 and includes a water supply unit W for receiving water and a stirring unit A for stirring the raw materials in the inner tank. So that cleaning of the tertiary raw material is performed.

Finally, the third filtering unit 213 filters the tertiary raw material stored in the third storage tank 215, separates the cellulose component into a fourth raw material, supplies it to the nano unit 3, Is discharged through a nanofilter (NF).

At this time, the treated water discharged through the first filtering unit 211 is sent to the treated water tank 216 to be recycled for about four to five times, and the second filtered unit 212 and the third filtered The treated water discharged from the unit 213 is sent to the discharge tank 217 so as to be stored and discharged. In addition, it is also possible to recycle the remaining cellulose component in the treated water by allowing the nanofilter (NF) to be discharged through the second discharge tank 217 when the treated water is discharged.

Alternatively, the filtering unit 2, specifically, the first filtering unit 211, the second filtering unit 212, and the third filtering unit 213 may use a filter filtering method other than a centrifugal separation method .

FIG. 3 is a cross-sectional view illustrating a structure of a filtering unit according to a preferred embodiment of the present invention, showing a filtration tank 22 for separating nano-cellulose components using a nanofilter (NF).

The filtration tank 22 is a cylindrical tank whose lower part is tapered to the center. The fourth supply part 221 is provided at an upper side of the filtration tank 22 and the lower end of the filtration tank 22 is narrowed toward the lower center. Is connected to the first connection pipe (225) for transferring the treated water to the process water tank (216) or the discharge tank (217) for reuse or post-treatment.

A filter installation part 222 is provided on the upper side of the narrow part of the lower part of the filtration tank 22 in the form of traversing the inside so that the filtration part 25 made of the nanofilter NF is installed, The upper space and the lower space are divided based on the space 25.

The filtration unit 25 basically includes the nanofilter NF, so that the water including the moisture and the catalyst is moved downward through the filtration unit 25. As the nanocellulose particles stay on the upper side, A second discharge pipe 223 and a second discharge valve 224 for discharging the water to the upper side of the filter installation part 222 are connected to the second storage tank 214 or the third storage tank 214 215 or the nanofusion unit 3. [

In the present invention, in order to maximize the filtering effect by varying the pressure on the front and rear sides of the filtration unit 25 in filtering the nanocellulose material through the filtration unit 25, the third sensor unit 231 and the vacuum pump And a pressurizing unit 24 including a first pressure reducing unit 23 and a first compressor 243.

The third sensor unit 231 measures the pressure inside the filtration tank 22 as a pressure sensor. The vacuum pump 234 is a pump capable of forming a vacuum inside the filtration tank 22 and includes a first pressure reducing pipe 232 and a first pressure reducing valve 123 on the upper side of the filtration tank 22 And is connected to the first connection pipe 225 through the second pressure reducing pipe 235 and the second pressure reducing valve 236 so that the first pressure reducing pipe 232 or the second pressure reducing pipe 235 The pressure inside the filtration tank 22 is reduced.

In the present invention, since the filtration unit 25 is installed in the filter installation unit 222 to divide the inside of the filtration tank 22, the first pressure reducing valve 233 is opened and the first pressure reducing pipe 232 The vacuum in the lower space of the filtration part 25 provided through the second decompression pipe 235 in the state where the second decompression valve 236 is opened is formed in a vacuum state . At this time, the third sensor unit 231 is installed to measure the pressure of the upper space of the filtration unit 25 installed.

The first compressor 243 constituting the pressure unit 24 is an air compressor for generating high pressure air and has a structure similar to that of the vacuum pump 234 and a first pressure pipe 241 And is connected to the first connection pipe 225 through the second pressure pipe 244 and the second pressure pipe 245 so that the first pressure pipe 241 ) Or the second pressurizing pipe (244). That is, a pressurized environment of the space above the filtration part 25 provided through the first pressurizing pipe 241 is formed in a state where the first pressurization valve 242 is opened. Conversely, when the second pressurization valve 245 is opened A pressurized environment of the lower space of the filtration part 25 provided through the second pressurizing pipe 244 is formed.

The filtration unit 25 is installed to block the inside of the lower portion of the filtration tank 22 along the filter installation unit 222 and basically includes a nanofilter (NF) for filtering nano- To pass only the liquid component and prevent the emission of nanoparticles.

Since the nanofilter NF has a weak strength, there is a high possibility that the nanofilter NF is damaged in an environment where a pressurized environment is formed above the filtration unit 25 and a vacuum is formed at the lower side. And a pair of support plates 251 on which a plurality of holes 252 are formed. The nanofilters NF are installed in close contact with each other.

Although the size of the hole 252 is relatively large in order to facilitate understanding, the nanofilter NF is formed to be substantially small, so that even if the vacuum environment is simultaneously applied to the one side and the other side, So as not to be damaged.

In order to prevent the leakage of the raw material due to the gap between the filtration unit 25 and the filter installation unit 222 due to the pressure difference between the upper and lower sides of the filtration unit 25, A continuous groove is formed along the inner wall of the filtration tank 22 so as to surround a part of the outer periphery of the filtration part 25 surrounded by the packing part 253, It is preferable to constitute the filter installation part 222. [

The second decompression pipe 235 and the second decompression pipe 234 are connected to the first connection pipe 225 and the second decompression pipe 235 so that the moisture passing through the filtration unit 25 is not introduced into the second decompression pipe 235 and the second pressure pipe 244, And the second pressurizing pipe 244 may be connected to the first connection pipe 225 to be inclined downward as shown in the accompanying drawings.

In addition, the control unit corresponding to the MCU is supplied with power, and the third sensor unit 231, the vacuum pump 234, the first compressor 243, the first pressure reducing valve 233, and the second pressure reducing valve The first pressurizing valve 242 and the second pressurizing valve 245 are controlled so as to selectively control the first pressurizing valve 242 and the second pressurizing valve 245. Specifically, in a state in which the processing raw material is injected in a predetermined amount into the filtration tank 22, The second pressure reducing valve 236 is opened and the vacuum pump 234 is operated so that the lower side of the filtration part 25 is opened by operating the first compressor 243 to press the upper side of the filtration part 25, The first connection pipe 225 of the first connection pipe 225 is depressurized to maximize the filtering performance so that moisture in the raw material can be separated at a high speed.

Thereafter, the pressure inside the filtration tank is monitored through the third sensor unit 231, and the second pressure reducing valve 236 is closed inversely as the internal pressure of the filtration unit 25 is detected to be higher than the set value, 1 pressure reducing valve 233 is opened to depressurize the upper side of the filtration section 25 to close the first pressurization valve 242 and open the second pressurization valve 245 to press the lower side of the filtration section 25, The filtration unit 25 may be washed by back pressure.

The cellulose component separated by the filtering unit is decomposed through the nanoizing unit. Various types of decomposition can be performed, but in the present invention, decomposition is performed using ultrasound under a reduced pressure condition.

FIG. 4 is a cross-sectional view illustrating a nano structure according to a preferred embodiment of the present invention.

The decomposition tank 31 is a cylindrical tank whose lower part is tapered to the center. The fifth supply part 311 is provided on the upper side of the decomposition tank 31 and the lower part of the decomposition tank 31 is narrowed to the lower part. And a second connection pipe 313 having a third discharge valve 312 is coupled to the second connection pipe 313 so that the second connection pipe 313 can be discharged.

In addition, in order to disperse the cellulose raw material through the ultrasonic wave and to increase the fluidity of the raw material contained in the decomposition tank 31, an internal pressure reducing environment is created. For this purpose, a fourth sensor unit 321 and a pressure reducer 324 The second pressure-reducing portion 32 is provided.

The fourth sensor unit 321 is a pressure sensor for measuring the pressure inside the decomposition tank 31. The decompressor 324 is connected to the third decompression pipe 322 and the third decompression pipe 324 on one side of the decomposition tank 31, The decompression tank 31 is connected to the third decompression valve 323 through the third decompression valve 323 to decompress the inside of the decomposition tank 31. The decompression tank 31 is formed of a vacuum pump capable of forming a vacuum inside the decomposition tank 31.

In addition, a decomposition unit 33 for dispersing and decomposing the cellulose raw material contained in the decomposition tank through ultrasonic waves is provided as a key construction of the present invention.

The decomposition unit 33 includes an oscillator 331 and an oscillator 332 for generating and outputting ultrasonic waves of a predetermined frequency and is disposed along the inner side of the decomposition tank 31 in combination with the oscillator 332, And an ultrasonic horn 333 for applying ultrasonic waves.

At this time, the oscillating unit 331 generates ultrasound having a frequency of about 20 to 28 kHz to decompose the cellulose raw material, and the frequency can be varied within a set range. The ultrasonic waves generated through the oscillating unit 331 are outputted through the vibrator 332 provided on the upper side of the decomposition tank 31. As the temperature of the vibrator increases for a long time due to the vibration due to the ultrasonic output, The installation of the cooling fan can be performed together.

 A cylindrical ultrasonic horn 333, which is spaced apart from the inner wall of the decomposition tank 31, is coupled under the vibrator 332 to uniformly apply ultrasonic waves to the inside of the raw material. At this time, the vibrator 332 and the ultrasonic horn 333 are coupled through the stud bolt to securely secure and smoothly transmit the ultrasonic waves. Preferably, the ultrasonic horn 333 and the ultrasonic horn 333 are made of a titanium material for the purpose of erosion and strength maintenance of the ultrasonic horn 333 due to ultrasonic vibration. (333).

The ultrasonic horn 333 has a columnar shape with a predetermined length, and the ultrasonic wave amplification unit 334 has a side surface protruding so as to perform ultrasonic wave amplification corresponding to frequencies generated and transmitted as ultrasonic waves are transmitted from the upper side to the lower side . In the accompanying drawings, one amplifying unit 334 is formed at an intermediate portion of the amplifying unit 334 so that the ultrasonic wave is amplified according to the ultrasonic frequency and smooth ultrasonic waves are applied. In the amplifying unit 334, The ultrasonic wave can be adjusted through the oscillating unit 331.

In the present invention, the lower end of the ultrasonic horn 333 is formed with a conical protrusion 335 corresponding to the lower surface of the decomposition tank 31, and a spiral groove is formed in the protrusion 335.

The end portion of the conventional ultrasonic horn has a straight shape. In the present invention, the nano-structure is rapidly promoted through the conical V-shaped cross-section and the protrusion 335 has the same inclination angle as the bottom surface of the decomposition tank 31 And the raw material circulated and discharged through the first connection pipe 225 flows along the spiral groove in contact with the protrusion 335 as described below, As the time increases, the effect of nanogenization can be improved. In addition, relatively large non-nanoized inclusion contents are moved downward due to the inclination of the bottom surface of the decomposition tank 31 and the projections 335, so that relatively large cellulose particles can be smoothly decomposed.

In addition to the configuration of the decomposing unit 33, the circulating unit 34 is provided to continuously circulate the raw material until sufficient nanoization of the raw material is achieved.

The circulation unit 34 basically sucks the raw material from the side of the decomposition tank 31 and discharges and circulates the raw material through the first connection pipe 225. The circulation pipe 341 and the circulation pump 342, Respectively. At this time, a part or the whole of the circulation pipe 341 is made of a transparent material so that the nano-level of the circulated raw material can be monitored, and the decomposition state of the nanocellulose of the raw material passing through the circulation pipe 341 is checked through the optical sensor And a fifth sensor unit 343 is provided.

Specifically, the second sensor unit 15 includes a light emitting unit that emits light of a wavelength and a color set to the circulation pipe 341 of transparent material, and a light receiving sensor that receives light passing through the circulation pipe 341 It is possible to monitor the degree of nanoization of the cellulose material in the raw material according to the result of receiving light.

In order to prevent the temperature of the raw material from rising and deteriorating due to the temperature rise of the ultrasonic horn 154 as the raw material receives the ultrasonic wave for a long time in the decomposition tank 31, the raw material circulating in the circulating pipe 341 is set A heat exchanging portion 344 is provided for cooling to maintain the temperature range.

The heat exchanger 344 is installed in the decomposition tank 31 and is connected to a temperature sensor unit for measuring the temperature of the raw material contained in the decomposition tank 31. The heat exchanger 344 is connected to the heat exchanger 344 via a cooling means such as a water- The cooling water can be cooled.

The second connection pipe 313 is connected to the fourth storage tank 35 through the third discharge valve 312 in addition to the circulation pipe 341 to receive the decomposed raw material. That is, while the third discharge valve 312 is closed, it is circulated so that the cellulose raw material can sufficiently be nanoized. When it is confirmed through the fifth sensor part 343 that the nanoization is sufficiently performed, the third discharge valve 312, The nanoized raw material is transferred to the fourth storage tank 35.

The control unit controls the decompressor 324 according to the detection result of the fourth sensor unit 321 and controls the oscillation unit 331 and the circulation pump 342 according to a result of the fifth sensor unit 343. [ And a control unit for controlling the heat exchanging unit 344 is provided.

The cellulose decomposed through the nanofibers is dried through the drying unit and obtained in the form of nanocellulose particles.

FIG. 5 is a cross-sectional view illustrating a structure of a drying unit according to a preferred embodiment of the present invention, showing the structure of a tubular body 41 corresponding to a drying path in which a drying space 411 is formed.

In this case, the body 41 may be formed in various shapes, but in the present invention, nano-cellulose is basically dried using the hot air, so that the nano-cellulose powder that flows and dries smoothly in the inner drying space 411 is collected It is preferable that it is formed in a cylindrical shape.

The body 41 is formed with a supply part 412 for supplying hot air to the upper side of the body 41 and a discharge part 413 for discharging hot air to the lower side of the body 41 and equipped with a nanofilter NF. And the fourth discharge pipe 414 and the fourth discharge valve 415 are formed to smoothly collect and discharge dried nano-cellulose in powder form.

At this time, the supply part 412 is connected obliquely to the outside of the body so as to be diagonally connected to the outside of the body, so that the hot air supplied is circulated in the drying space 411 to form a vortex, and the dried nanocellulose particles fall due to gravity The exhaust part 413 is formed so as to narrow down to the lower side of the body 41 so that the hot air circulating in the drying space along the sidewall on the boundary can be discharged to the outside.

The nano-filter (NF) is a filter for preventing nano-cellulose particles from being discharged together with hot air discharged through the exhaust part (413). The filter is basically constructed to pass only air and prevent the nanoparticles from being discharged .

The supply unit 412 is connected to a hot air fan 42 for sucking and heating the outside air and discharging and supplying the outside air.

In the present invention, high-pressure air is used to disperse such a raw material in the drying space 411 so that the drying can be smoothly performed. To this end, a second compressor 43 for generating high- The jetting part 44 is provided in the space 411 so that the raw material can be sprayed together with the high-pressure air.

The jetting unit 44 basically includes a drying pump 441 for sucking the raw material contained in the fourth storage tank 35 and discharging the raw material to the high pressure, A second nozzle 442 surrounding the first nozzle 442 and injecting high-pressure air in the same direction as the jetting direction of the first nozzle 152, 443 so that the raw material can be mixed with the high-pressure air to be sprayed.

At this time, since the heater 444 is installed on the pipe connecting the second nozzle 434 from the second compressor 433, the high-pressure air injected through the second nozzle 443 is heated to increase the drying efficiency And the raw material supplied through the drying pump 441 through the waste heat of the air discharged through the discharge unit 413 can be heated.

The first nozzle 442 and the second nozzle 443 are provided with a solenoid valve and are configured to be opened and closed by a control unit. And the impingement plate 445 having a conical protrusion toward the first nozzle 442 is positioned at the center of the first nozzle 442, and the raw material and air to be injected are crushed and dispersed to the side.

At this time, by installing a small motor 446 below the impingement plate 445, the impingement plate 445 can be rotated at a high speed to accelerate the dispersion of the high pressure air and the impinging material.

In addition, when the nanofilter (NF) located on the exhaust part 413 is blocked by accumulation of the nanocellulose particles, a pressure rise due to hot air continuously supplied through the hot air fan 42 occurs.

At least one back pressure filter unit 416 having a nanofilter NF is provided on the upper side of the body 41 to open when the inside of the drying space 411 rises above the set pressure. That is, the pressure inside the drying space 411 is increased by maintaining the closed state through an elastic body such as a spring, and the inner pressure is released by overcoming the acting force of the elastic body. In order to prevent the nanocellulose particles from being discharged together, The same nano-filter NF as that provided in the nano-filter NF is installed.

The back pressure filter unit 416 is a safety device for preventing the body 41 from being damaged due to an increase in internal pressure. The back pressure filter unit 416 substantially accumulates in the body 41, Particles may lead to a decrease in drying efficiency.

In this case, a cleaning unit is provided for periodically cleaning the nanofilter (NF) and recovering normal performance by removing accumulated particles.

The cleaning unit includes a plurality of third nozzles 461 formed at the side of the fourth discharge pipe 414 and the fourth discharge valve 415 to discharge the high pressure air generated through the second compressor 43 to the upper side, . This is a structure for removing accumulated particles accumulated on the bottom of the body 41 and remaining on the side of the fourth discharge valve 415 including the remaining particles not discharged to the fourth discharge pipe 414 side. Preferably, as shown in the accompanying drawings, a plurality of third nozzles 461 are provided above and below the fourth discharge valve 415, and the fourth discharge pipe 414 and the second discharge pipe 414 are connected to each other through a third nozzle 461, The particles deposited on the fourth discharge valve 415 are removed and the deposited particles are removed on the bottom side of the body 41 having a shape narrowed through the third nozzle 461 on the upper side.

Next, the cleaning unit is provided with a fourth nozzle 462 for removing accumulated particles by spraying high pressure air onto the surface of the nanofilter provided in the back pressure filter unit 416 and the exhaust unit 413. Similarly, the third nozzle 461 and the fourth nozzle 462 are also provided with a solenoid valve so that the opening and closing of the third nozzle 461 and the fourth nozzle 462 are controlled through the control unit. As the dried nanoparticles accumulate in the lower portion of the body 41, the fourth discharge valve 415 is opened to discharge the dry nanoparticles. For this purpose, the hot air 42 and the second compressor 43, And a controller C for controlling the driving of the drying pump 441 and the heater 444 and the opening and closing of the first nozzle 442, the second nozzle 443, the third nozzle 461 and the fourth nozzle 462 Respectively.

 The reforming reaction unit 5 for changing the chemical modification of the dried nanocellulose particles is connected to the fourth discharge pipe 414.

In the case of the raw material processed through the nanoizing part 3 and stored in the fourth storage tank 35, it is basically hydrophilic and applicable to various liquid products including cosmetics. However, when it is applied to resin products such as ABS, PP, PE, and PU, the hydrophilic property should be modified to have a hydrophobic property, and the hydrophilic carboxyl group should be removed. Accordingly, in the reforming reaction unit 5, a known chemical is introduced and processed so that chemical substitution can be performed to remove the carboxyl group of the raw material.

It is to be understood that the invention is not limited to the disclosed embodiment, but is capable of many modifications and variations within the scope of the appended claims. It is self-evident.

1: treatment tank 11: first supply part
12: second supply part 13: third supply part
14: first sensor unit 15: second sensor unit
16: first discharge pipe 17: first discharge valve
18: first storage tank 191: first medicine supply part
192: second medicine supply part 193: third medicine supply part
2: filtering unit 211: first filtering unit
212: second filtering unit 213: third filtering unit
214: second storage tank 215: third storage tank
216: process water tank 217: discharge tank
22: Filtration tank 221: Fourth supply part
222: filter installation part 223: second discharge pipe
224: second discharge valve 225: first connection pipe
23: first pressure reducing section 231: third sensor section
232: first pressure reducing pipe 233: first pressure reducing valve
234: Vacuum pump 235: Second pressure reducing pipe
236: second pressure reducing valve 24:
241: first pressurizing pipe 242: first pressurizing valve
243: first compressor 244: second pressure pipe
245: second pressurizing valve 25:
251: support plate 252: hole
3: Nanoizing part 31: Decomposition tank
311: fifth supply part 312: third discharge valve
313: second connecting pipe 32: second pressure reducing portion
321: fourth sensor unit 322: third pressure reducing pipe
323: third pressure reducing valve 324: pressure reducing valve
33: decomposition part 331: oscillation part
332: Oscillator 333: ultrasonic horn
334: Amplification unit 335:
34: circulation part 341: circulation piping
342: circulation pump 343: fifth sensor unit
344: heat exchanger 35: fourth storage tank
4: drying section 41: body
411: Drying space 412: Supply port
413: exhaust port 414: fourth exhaust pipe
415: fourth discharge valve 416: back pressure filter section
42: hot air fan 43: second compressor
44: jetting section 441: drying pump
442: first nozzle 443: second nozzle
444: Heater 445: Collision plate
446: motor 461: third nozzle
462: fourth nozzle 5: reforming reaction part
P: Pump W: Water supply
A: agitating part MF: micro filter
NF nanofilter C: control section

Claims (5)

In a nanocellulose manufacturing system,
A first supply part 11 and a second supply part 12 which are respectively supplied with a cellulose raw material and water on the upper side and a supply pump 11 which is provided with respective oxidant, A third supply part 193 for introducing the treated water to the side of the first medicine supply part 191, a second medicine supply part 192 and a third medicine supply part 193, A second sensor unit 15 for sensing the level of the raw material and an agitating unit A for agitating the raw material in the inside and narrowing down to the lower center and discharging the primary treatment material, 16) and a first discharge valve (17) to which the first storage tank (18) is connected;
A filtering unit (2) for filtering the primary treatment raw material stored in the first storage tank (18) to separate the cellulose component and discharge the remaining treatment water;
A treatment water tank 216 which receives treated water discharged from the filtering unit 2 and passes through a filter through which a catalyst component can pass and supplies the filtered water through the third supply unit 13;
A nanofiber section (3) for decomposing the cellulose component separated in the filtering section (2) using ultrasound under a reduced pressure condition;
A drying unit 4 for drying the cellulose decomposed through the nanofiber 3 to obtain nanocellulose particles;
A reforming reaction part (5) for changing the modification according to the chemical substitution of the dried nanocellulose particles; Lt; / RTI >
The filtering unit (2)
A first filtering unit 211 for filtering the primary treatment raw material stored in the first storage tank 18 to separate the cellulose component into secondary treatment raw materials and discharging the remaining treatment water to the treatment water tank 216 through a filter, )Wow,
A second storage tank 214 having a water supply part W for receiving water and a stirring part A for stirring the raw material to receive the secondary treatment raw material separated from the first filtering part 211, ,
A second filtering unit 212 for filtering the secondary treatment raw material stored in the second storage tank 214 to separate the cellulose component into a tertiary treatment raw material and discharging the remaining treatment water through a filter,
A third storage tank 215 having a water supply part W for receiving water and a stirring part A for stirring the raw materials in the third filtering part 212 separated from the third filtering part 212, ,
A third filtering unit for filtering the tertiary raw material stored in the third storage tank 215 to separate the cellulose component into a fourth raw material and supplying it to the nanofiber unit 3 and the remaining processed water through a filter 213,
And a discharge tank (217) for storing and discharging the treated water discharged from the second filtering unit (212) and the third filtering unit (213).
delete The method according to claim 1,
The filtering unit (2)
A second supply pipe 223 disposed above the filter installation part 222 and a second supply pipe 223 disposed above the filter installation part 222, A tubular filtration tank 22 having a first connection pipe 225 coupled to a discharge pipe 224 for separating and discharging the raw material to be treated,
A third sensor unit 231 for measuring a pressure inside the filtration tank 22 and a third pressure sensor 233 connected to the upper side of the filtration tank 22 through a first pressure reducing pipe 232 and a first pressure reducing valve 233, Is selectively connected to the first connection pipe 225 through the second pressure reducing pipe 235 and the second pressure reducing valve 236 so that the selective pressure reduction through the first pressure reducing pipe 232 or the second pressure reducing pipe 235 is A first depressurizing portion 23 having a vacuum pump 234 for performing the depressurization,
The first pressurizing pipe 242 and the second pressurizing valve 242 are connected to the upper side of the filtration tank 22 via the first connecting pipe 225 and the second pressurizing pipe 244 and the second pressurizing valve 242, And a first compressor (243) connected through a first pressurizing pipe (245) and selectively pressurizing through the first pressurizing pipe (241) or the second pressurizing pipe (244)
A pair of support plates 251 provided on the filter installation part 222 along the lower side of the filtration tank so as to cut across the inside of the filtration tank and having a plurality of holes 252, A filtering section 25 provided with a nanofilter NF,
The interior of the filtration tank 22 is depressurized and the first connection pipe 225 is connected to the first connection pipe 225 in accordance with the detection result of the third sensor unit 231, And a control section for pressing the tube (225) side to clean the filtration section (25).
The method according to claim 1,
The nanoizing part (3)
A second connection pipe 313 having a fifth supply part 311 for supplying the treatment material to the upper side and a third discharge valve 312 for narrowing down to the lower center and discharging the decomposed raw material, A decomposition tank 31 having a tubular shape combined with the tubular decomposition tank 31,
A fourth sensor section 321 for measuring the pressure inside the decomposition tank 31 and a second sensor section 322 connected through the third decompression pipe 322 and the third decompression valve 323 to decompress the inside of the decomposition tank 31 A second pressure reducing section 32 having a pressure reducing device 324,
An oscillator 332 and an oscillator 332 for generating ultrasonic waves of a predetermined frequency and outputting ultrasonic waves of a predetermined frequency and an oscillator 332 which is positioned along the inside of the decomposition tank 31 in combination with the oscillator 332, And an ultrasonic horn 333 having a projected amplification part 334 and an end part protruding in a conical shape corresponding to the lower side of the decomposition tank 31 and having a helical groove formed therein 33,
A circulation pipe 341 and a circulation pump 342 for sucking the raw material from the side of the decomposition tank 31 and discharging and circulating the raw material through the second connection pipe 313 into the decomposition tank 31, A fifth sensor unit 343 for confirming the decomposition state of the raw material nanocellulose passing through the circulation pipe 341 and a heat exchanging unit 344 for cooling the circulating material installed in the circulation pipe 341 A circulation unit 34,
And controls the pressure reducing unit 324 according to the detection result of the fourth sensor unit 321 and controls the oscillation unit 331, the circulation pump 342, (344) of the nano-cellulosic fibers.
The method according to claim 1,
The drying unit (4)
A drying space 411 is formed therein and a supply part 412 for supplying hot wind to the upper side and an exhaust part 413 for discharging hot wind to the lower side and equipped with the nanofilter NF are formed, A tubular body 41 having a fourth discharge pipe 414 and a fourth discharge valve 415 which are narrowed,
A hot air fan 42 for supplying hot air through the supply unit 412,
A second compressor 43 for generating high-pressure air,
A drying pump 441 for sucking the raw material decomposed in the nanoizing unit 3 and discharging the raw material decomposed by the nanoizing unit 3 at a high pressure, a first nozzle (not shown) for spraying the raw material discharged from the drying pump 441 from above the drying space 411 A second nozzle 443 surrounding the first nozzle 442 and injecting high pressure air; a heater 444 heating the air supplied to the second nozzle 443; A jetting section 44 having a first nozzle 442 and an impingement plate 445 disposed on the entire surface of the second nozzle 443 and dispersing the jetted material,
And a controller for controlling the driving of the hot air fan 42, the second compressor 43, the drying pump 441 and the heater 444, and the opening and closing of the first nozzle 442 and the second nozzle 443. Nanocellulose fiber manufacturing system.

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