KR20230063586A - Mobile fast pyrolysis system and pyrolysis oil manufacturing method for utilization of unused forest biomass - Google Patents

Abstract

Disclosed is a mobile rapid pyrolysis system. The mobile rapid pyrolysis system is a mobile rapid pyrolysis system for utilizing unused forest biomass which is equipped in a container and can be mounted on a vehicle trailer and moved, comprising: a dryer for inputting biomass samples produced by crushing them through a crusher and drying them by applying hot air to the input biomass samples; a hopper into which biomass samples dried through the dryer are input and temporarily stored; a rapid pyrolysis reactor which receives the dried biomass sample from the hopper and rapidly pyrolyzes it; a screw cooling reactor for cooling and recovering the biochar obtained after rapid pyrolysis in the rapid pyrolysis reactor; a cyclone for collecting particles scattered in the non-condensed gas generated by the pyrolysis reaction of the rapid pyrolysis reactor and recovering biochar; a primary oil recovery device for primarily recovering pyrolysis oil by condensing the gas transported through the cyclone; a secondary oil recovery device for secondary recovery of pyrolysis oil by condensing the gas transferred through the primary oil recovery device; and a cooling device for supplying cooling water to the screw cooling reactor and the primary oil recovery unit. Accordingly, the present invention can improve economic efficiency by reducing storage and transportation costs of biomass.

Description

Mobile rapid pyrolysis system and pyrolysis oil manufacturing method for utilization of unused forest biomass

The present invention relates to a mobile rapid pyrolysis system for utilizing unused forest biomass and a method for producing pyrolysis oil. More specifically, unused forest biomass can be directly converted into pyrolysis oil on site, and It relates to a mobile rapid pyrolysis system for utilizing unused forest biomass and a method for producing pyrolysis oil, which can improve economic feasibility by reducing storage and transportation costs of biomass by converting biomass into a form of pyrolysis oil.

In order to solve environmental problems such as global warming and the depletion of fossil resources, research on bioenergy that is carbon-neutral and uses biomass equivalent to 4.1 billion tons of oil is attracting attention.

Among various thermochemical conversion processes of biomass, rapid pyrolysis technology is a process that can maximize the yield of pyrolysis oil, which is a liquid product. There is one advantage.

Pyrolysis oil produced using the rapid pyrolysis process has been proven to be available as a carbon-neutral, eco-friendly renewable alternative fuel, and is used in combustion facilities such as boilers in developed countries including Europe. It is being used.

In the rapid pyrolysis process, the reactor in which biomass is directly pyrolyzed is the core of the entire process, and depending on the type of reactor, the process and characteristics of the pyrolysis product also change.

The core technology of the rapid pyrolysis process is the heat transfer rate, temperature control, and residence time of the pyrolysis product, and a lot of research is being conducted to develop various types of pyrolysis reactors that can realize this.

In Korea, 65% of the country's land area is composed of mountainous areas and it is distributed in various regions, so producing pyrolysis oil by installing a rapid pyrolysis plant in a specific region has a problem of low economic feasibility considering the cost of collecting and transporting biomass. .

Meanwhile, the potential of domestic forest biomass resources is estimated at 355,602,000 TOE as of 2016, and coniferous forests, broad-leaved forests, and mixed forests are equally distributed. In addition, according to the Korea Forest Service's timber supply and demand performance, it is on a continuous increase from about 2,300,000 tons in 2007 to about 4,210,000 tons in 2015. As a result, the amount of unused forest biomass generated by the forestry business is increasing every year, but it is not utilized due to excessive collection costs and is left or abandoned in forest land.

Domestic biomass is abundant and not regionally ubiquitous, but it is dispersed, so it is urgent to build infrastructure necessary for collection, transportation, storage, and management in order to utilize it.

Korean Registered Patent No. 10-1839845

An object of the present invention is to solve this problem, by constructing a mobile rapid pyrolysis system, unused forest biomass can be directly converted into pyrolysis oil in the field, and biomass can be directly converted into pyrolysis oil in the field. It is to provide a mobile rapid pyrolysis system and a method for producing pyrolysis oil for utilization of unused forest biomass that can improve economic feasibility by reducing storage and transportation costs of biomass by conversion.

A mobile rapid pyrolysis system for utilizing unused forest biomass according to an embodiment of the technical idea of the present invention for achieving the above object is built in a container and mounted on a vehicle trailer to utilize unused forest biomass that can be moved. In a mobile rapid pyrolysis system for a biomass sample produced by being crushed through a crusher, a dryer for drying by applying hot air to the input biomass sample; a hopper into which the biomass sample dried through the dryer is put and temporarily stored; A rapid pyrolysis reactor receiving the dried biomass sample from the hopper and performing rapid pyrolysis; A screw cooling reactor for cooling and recovering biochar obtained after rapid pyrolysis in the rapid pyrolysis reactor; a cyclone for collecting particles scattered in the non-condensable gas generated by the pyrolysis reaction of the rapid pyrolysis reactor and recovering biochar; a primary oil recovery unit for primarily recovering pyrolysis oil by condensing the gas transported through the cyclone; a secondary oil recovery unit for secondarily recovering pyrolysis oil by condensing the gas transported through the primary oil recovery unit; and a cooling device for supplying cooling water to the screw cooling reactor and the primary oil recovery unit.

In addition, the dryer is a cylindrical structure disposed in the horizontal direction, a heating chamber provided with an inlet into which the crushed biomass sample is input and an outlet through which the dried biomass sample is discharged in the lower portion; a screw installed in the heating chamber in a horizontal direction so that the introduced biomass sample is smoothly stirred; and a heating blower for blowing hot air into the heating chamber.

In addition, the rapid pyrolysis reactor has a cylindrical structure disposed in a horizontal direction, and has an inlet at the top into which the biomass sample discharged from the hopper is introduced and a rapid pyrolysis biomass sample at the bottom to be delivered to the screw cooling reactor. A pyrolysis reaction chamber provided with an outlet to be; a screw installed in the pyrolysis reaction chamber in a horizontal direction so that the biomass sample introduced through the inlet is transported in one direction; and a band heater installed inside the pyrolysis reaction chamber to increase the temperature within the pyrolysis reaction chamber in order to cause a rapid pyrolysis reaction of the biomass sample transferred from the hopper.

In addition, the screw cooling reactor has a cylindrical structure arranged in a horizontal direction, and the upper part is connected to the outlet of the rapid pyrolysis reactor, and the biochar obtained through the pyrolysis reaction is input, and the biochar obtained after cooling is discharged at the lower part. a cooling chamber provided with a discharge port and receiving cooling water into a space isolated to the outside; and a screw installed in the cooling chamber in a horizontal direction to transfer the biochar introduced through the inlet in one direction.

In addition, the primary oil recovery device is a cylindrical structure disposed in the vertical direction, and a gas inlet through which the gas phase transported from the rapid pyrolysis reactor flows in is provided on one side, and a gas outlet through which the gas that has passed through the condensation process is discharged on the other side. a condensation chamber having an oil discharge port through which pyrolysis oil is discharged at a lower end and receiving cooling water into an internal space; and a tube installed inside the condensation chamber, through which the gas introduced through the gas inlet is condensed, and composed of a plurality of tubes installed to be isolated from the cooling water accommodated in the condensation chamber. .

In addition, the secondary oil recovery device has a cylindrical structure disposed in the vertical direction, and a gas inlet through which the gas phase transported from the primary oil recovery device flows is provided on one side, and a gas outlet through which the gas that has undergone the condensation process is discharged on the other side. Is provided, and may be an electric precipitator or scrubber including a condensation chamber having an oil discharge port through which pyrolysis oil is discharged at a lower end.

In addition, a first buffer tank installed in communication with the gas outlet of the secondary oil recovery unit and recirculating the non-condensed gas discharged through the gas outlet of the secondary oil recovery unit to the rapid pyrolysis reactor may be further included. .

In addition, the second buffer tank is installed to be connected to the rear end of the first buffer tank and has a recirculation pipe connected to the primary oil recovery unit in order to recirculate the non-condensable gas passing through the first buffer tank to the rapid pyrolysis reactor. may further include.

In addition, an exhaust blower may be further included between the first buffer tank and the second buffer tank to blow the non-condensed gas passing through the first buffer tank to smoothly reach the rapid pyrolysis reactor.

In addition, the primary oil recovery device may further include a cleaning device installed at the gas inlet and cleaning the tube inlet.

In addition, the cleaning device may include a pump connected to the gas inlet to pump a cleaning solvent; a spray nozzle for spraying the cleaning solvent delivered from the pump toward the inlet of the tube; and a valve installed between the pump and the injection nozzle to control the flow of the cleaning solvent pumped through the pump.

In addition, in the primary oil recovery device, a hot wire for drying moisture after cleaning the washing device may be built inside the vicinity of the gas inlet.

In addition, the mobile rapid pyrolysis system may further include a transfer means for transferring the biomass dried from the dryer to the hopper.

In addition, the conveying unit may be a conveyor inclined to transfer the dried biomass sample from the lower side to the upper side from the outlet position of the dryer to a portion of the hopper into which the dried biomass sample is input.

In addition, the mobile rapid pyrolysis system may further include a mobile generator for supplying power to the entire system.

On the other hand, in the method for producing pyrolysis oil using unused forest biomass according to an embodiment of the technical idea of the present invention for achieving the above object, in the method for producing pyrolysis oil using a mobile rapid pyrolysis system, a) Drying the crushed biomass sample through a dryer; b) putting the biomass sample dried in step a into a hopper; c) receiving the dried biomass sample from the hopper and rapidly pyrolyzing the dried biomass sample through a rapid pyrolysis reactor; d) recovering the biochar obtained from the biomass sample through step c by cooling it through a screw cooling reactor; e) collecting particles dispersed in the non-condensable gas generated in step c through a cyclone and recovering biochar; f) condensing the gas transported through step e to primarily recover pyrolysis oil through a primary oil recovery unit; g) condensing the gas transported through step f to secondarily recover pyrolysis oil through a secondary oil recovery unit; h) supplying cooling water to the screw cooling reactor and the primary oil recovery unit; and i) recycling the non-condensable gas discharged from the secondary oil recovery unit to the rapid pyrolysis reactor via a first buffer tank and a second buffer tank.

The mobile rapid pyrolysis system and the method for producing pyrolysis oil for utilizing unused forest biomass according to the present invention have the following effects.

First, it can be efficiently utilized because unused forest biomass, which is abundant and not regionally distributed but is dispersed and neglected, can be directly converted into pyrolysis oil in the field.

Second, by converting biomass into the form of pyrolysis oil, it is possible to reduce the cost of storing and transporting biomass, thereby increasing economic feasibility.

Third, due to the increase in the utilization of unused biomass, it is possible to turn into high value-added resources from neglected waste biomass and at the same time reduce dependence on the petrochemical industry.

Fourth, instead of producing only pyrolysis oil through rapid pyrolysis, biochar that can be used as a solid fuel can be recovered in an intact state without being oxidized through a char cooler.

Fifth, since the produced non-condensable gas can be recycled through the buffer tank and used as a purge gas of the rapid pyrolysis system, the use of nitrogen gas consumed during rapid pyrolysis can be reduced, thereby improving economic feasibility.

1 is a schematic overview of a mobile rapid pyrolysis system according to an embodiment of the present invention.
Figure 2 is a front view of a mobile rapid pyrolysis system according to an embodiment of the present invention.
Figure 3 is a plan view of a mobile rapid pyrolysis system according to an embodiment of the present invention.
Figure 4 is a side cross-sectional view of the dryer of the mobile rapid pyrolysis system according to an embodiment of the present invention.
5 is a side cross-sectional view of a rapid pyrolysis reactor of a mobile rapid pyrolysis system according to an embodiment of the present invention.
Figure 6 is a side cross-sectional view of the screw cooling reactor of the mobile rapid pyrolysis system according to an embodiment of the present invention.
7 is a front cross-sectional view of the primary oil recovery unit of the mobile rapid pyrolysis system according to an embodiment of the present invention.
8 is a front cross-sectional view of a secondary oil recovery device of a mobile rapid pyrolysis system according to an embodiment of the present invention.
9 is a flow chart of a method for producing pyrolysis oil according to an embodiment of the present invention.

In order to fully understand the present invention and its operational advantages and objectives achieved by the practice of the present invention, reference should be made to the accompanying drawings illustrating preferred embodiments of the present invention and the description in the drawings.

Hereinafter, the present invention will be described in detail by describing preferred embodiments of the present invention with reference to the accompanying drawings. Like reference numerals in each figure indicate like members.

In the mobile rapid pyrolysis system according to an embodiment of the technical idea of the present invention, unused forest biomass can be directly converted into pyrolysis oil in the field by constructing a mobile rapid pyrolysis system, and the biomass can be directly converted into pyrolysis oil in the field. It relates to a mobile rapid pyrolysis system for utilizing unused forest biomass that can improve economic feasibility by reducing storage and transportation costs of biomass by converting it into a form of biomass.

1 is a schematic overview of a mobile rapid pyrolysis system according to an embodiment of the present invention, Figure 2 is a front view of a mobile rapid pyrolysis system according to an embodiment of the present invention, Figure 3 is an embodiment of the present invention Figure 4 is a side cross-sectional view of a dryer of the mobile rapid pyrolysis system according to an embodiment of the present invention, Figure 5 is a rapid pyrolysis reactor side of the mobile rapid pyrolysis system according to an embodiment of the present invention 6 is a side cross-sectional view of a screw cooling reactor of a mobile rapid pyrolysis system according to an embodiment of the present invention, and FIG. 7 is a front cross-sectional view of a primary oil recovery unit of a mobile rapid pyrolysis system according to an embodiment of the present invention, 8 is a front cross-sectional view of a secondary oil recovery device of a mobile rapid pyrolysis system according to an embodiment of the present invention.

1 to 8, the mobile rapid pyrolysis system according to an embodiment of the present invention includes a dryer 100, a hopper 200, a rapid pyrolysis reactor 300, a screw cooling reactor 400, and a cyclone. 500, a primary oil recovery unit 600, a secondary oil recovery unit 700, and a cooling device 800.

The mobile rapid pyrolysis system according to an embodiment of the present invention is for producing biochar produced while directly producing pyrolysis oil (bio-oil) and pyrolysis oil at a forest site, and is basically pyrolysis oil while moving throughout the forest site. In order to manufacture, facilities are built in a container and mounted on a vehicle trailer to be made of a movable structure.

Initially, unused forest biomass (1) is collected from the site and prepared by crushing using a crusher (2) to a certain standard, and using this crushed biomass sample, pyrolysis oil and biochar can be manufactured through a rapid pyrolysis process It can.

First, the dryer 100 is for hot air drying the biomass sample crushed by the crusher 2, and the biomass sample produced by being crushed by the crusher 2 is introduced, and hot air is applied to the input biomass sample to part to dry.

As shown in FIG. 4, the dryer 100 has a cylindrical structure arranged in a horizontal direction, and has an inlet 102 into which crushed biomass samples are input and an outlet through which dried biomass samples are discharged into the lower portion. A heating chamber 101 provided with 103, a screw 104 installed in the heating chamber 101 in a horizontal direction so that the introduced biomass sample is smoothly stirred, and hot air is blown into the heating chamber 101 It may include a heating blower 105 for blowing.

That is, when crushed biomass is introduced through the inlet 102 of the heating chamber 101, hot air is supplied from the heating blower 105 into the heating chamber 101, and the screw 104 rotates. so that the biomass sample in the heating chamber 101 can be well stirred, and when it is operated for a set time and drying is completed, the dried biomass sample is discharged through the outlet 103 provided in the lower center, When a certain amount of discharged biomass sample is loaded into the collection box (basket), it is transported to the next process.

As such, through the dryer 100, the biomass sample is rapidly dried with hot air to reduce the moisture content to 5 wt% or less. This is because the high moisture content of biomass during rapid pyrolysis affects the quality of the pyrolysis oil produced, so such a drying process must be performed.

Next, the hopper 200 is a part where the biomass sample dried through the dryer 100 is input and temporarily stored.

That is, the biomass sample dried and collected through the collection box is transferred to the hopper 200 and then introduced.

At this time, the mobile rapid pyrolysis system of the present invention, for example, may further include a transfer means 20 for transferring the biomass dried from the dryer 100 to the hopper 200.

For example, the transfer means 20 transfers the dried biomass sample from the lower side to the upper side from the position of the discharge port 103 of the dryer 100 to the portion of the hopper 200 into which the dried biomass sample is put. It may be made of a conveyor formed inclined to transfer.

That is, when the drying process is completed in the dryer 100 through the transfer means 20, it is possible to build an automated system that transfers the dried biomass sample to the hopper 200 without inputting operator manpower.

Next, the rapid pyrolysis reactor 300 receives the dried biomass sample from the hopper 200 and performs rapid pyrolysis.

The rapid pyrolysis reactor 300 is a cylindrical structure disposed in the horizontal direction, and has an inlet 402 into which the biomass sample discharged from the hopper 200 is input at the top and a biomass sample rapidly pyrolyzed at the bottom is cooled by the screw A pyrolysis reaction chamber 301 provided with an outlet 303 discharged to be delivered to the reactor 400, installed in the pyrolysis reaction chamber 301 in a horizontal direction, and the biomass sample introduced through the inlet 302 is directed in one direction A band heater installed inside the pyrolysis reaction chamber 301 to increase the temperature in the pyrolysis reaction chamber in order to cause a rapid pyrolysis reaction of the biomass sample delivered from the screw 304 and the hopper 200 to be transferred to (305).

That is, the biomass sample introduced through the hopper 200 is introduced into the pyrolysis reaction chamber 301 through the inlet 402, and is operated by an electric power installed on the inner wall of the pyrolysis reaction chamber 301 The internal space of the pyrolysis reaction chamber 301 is heated by generating high-temperature heat by the band heater 305, so that the pyrolysis process of the biomass sample is performed. At this time, the screw 304 is rotated by a rotational power means (motor), and accordingly, the biomass sample is stirred and moved forward in the direction of the outlet 303, and is finally discharged through the outlet 303.

At this time, the rapid pyrolysis process is decomposed into a gas phase and a solid phase while being performed under anoxic conditions around 500 ° C.

In addition, although a band heater is applied in this embodiment to heat the inside of the pyrolysis reaction chamber 301, the heating means capable of heating the biomass sample introduced into the pyrolysis reaction chamber 301 is not limited to the band heater. A variety of heating means can be applied.

Next, the screw cooling reactor 400 is a part for cooling and recovering biochar obtained after rapid pyrolysis in the rapid pyrolysis reactor 300.

The screw cooling reactor 400 has a cylindrical structure arranged in a horizontal direction, and has an inlet 402 connected to the outlet 303 of the rapid pyrolysis reactor 300 at the top and into which biochar obtained through the pyrolysis reaction is introduced, and a bottom An outlet 403 through which biochar obtained after cooling is discharged is provided, and a cooling chamber 401 in which cooling water is received as an isolated space outside, and an inlet 402 installed in the horizontal direction inside the cooling chamber 401 ) may include a screw 404 that allows the input biochar to be transferred in one direction.

That is, as it passes through the rapid pyrolysis reactor 300, the biomass sample undergoes a torrefaction process to produce biochar in a form similar to charcoal. It is a solid material produced in the process of decomposition, and is discharged to room temperature after being cooled in a high temperature state through the screw cooling reactor 400.

In addition, the gaseous material remaining in the cooling chamber 401 is transferred to the cyclone 500 to be described later.

In addition, the screw cooling reactor 400 can perform a biochar cooling process by receiving cooling water from a cooling device 800 to be described later, and the lower outer circumferential surface of the cooling chamber 401 accommodates the screw 404. A cooling water accommodating space separated from the space may be provided.

Next, the cyclone 500 is a part for collecting particles dispersed in the non-condensable gas generated by the thermal decomposition reaction of the rapid pyrolysis reactor 300 and recovering biochar.

That is, in the rapid pyrolysis reactor 300, the gaseous material serves to additionally collect solid particles in the gas that are not collected while passing through the cyclone 500.

Through this, the collected solid particles are discharged in the form of biochar.

Next, the primary oil recovery unit 600 is a part for primarily recovering pyrolysis oil by condensing the gas transported through the cyclone 500.

The primary oil recovery device 600 is a cylindrical structure disposed in the vertical direction, and a gas inlet 602 through which the gas phase transported from the rapid pyrolysis reactor 300 is introduced is provided on one side, and the gas that has undergone the condensation process is provided on the other side. A gas outlet 603 through which is discharged is provided, and an oil outlet 604 through which pyrolysis oil is discharged is provided at the lower end, and a condensation chamber 601 receiving cooling water into an internal space and inside the condensation chamber 601 and a tube 605 composed of a plurality of tubes installed to be isolated from the cooling water accommodated in the condensation chamber 601 and pass through after the gas introduced through the gas inlet 602 is condensed. can

That is, the primary oil collector 600 is a kind of shell and tube heat exchanger, and the gaseous material passing through the cyclone 500 flows into the primary oil collector 600 and the tube ( 605), and at this time, non-contact heat exchange with the cooling water is performed, so that pyrolysis oil is finally produced. The generated pyrolysis oil is discharged through the oil outlet 604 and then collected.

Next, the secondary oil recovery unit 700 condenses the gas transported through the primary oil recovery unit 600 to secondarily recover pyrolysis oil.

The secondary oil recovery device 700 has a cylindrical structure disposed in the vertical direction, and has a gas inlet 702 on one side through which the gas phase transported from the primary oil recovery device 600 flows, and on the other side after undergoing a condensation process. It may be an electric precipitator or scrubber including a condensation chamber 701 having a gas outlet 703 through which gas is discharged and an oil outlet 704 through which pyrolysis oil is discharged at a lower end thereof.

That is, the secondary oil recovery device 700 may be configured in the form of an electric precipitator or a scrubber. The electrostatic precipitator applies an electric field to solids (particles) suspended in the gas to make them energized and collect the particles with electrostatic force. As a device for cleaning gas, wet and dry methods may be applied depending on the method of removing dust collected in the dust collector.

Therefore, when the secondary oil recovery device 700 is configured in the form of an electric precipitator, it is possible to separate the particles from the gas phase containing the particles passing through the primary oil recovery device 600 and additionally collect them as pyrolysis oil.

On the other hand, it is installed in communication with the gas outlet 703 of the secondary oil recovery device 700, and the non-condensed gas discharged through the gas outlet 703 of the secondary oil recovery device 700 is transferred to the rapid pyrolysis reactor 300. ) may further include a first buffer tank 900a for recycling.

In addition, the primary oil recovery device ( 600) may further include a second buffer tank 900b to which the recirculation pipe 901 is connected.

At this time, between the first buffer tank 900a and the second buffer tank 900b, the non-condensed gas passing through the first buffer tank 900a can smoothly reach the rapid pyrolysis reactor 300. An exhaust blower 902 for blowing air may be further included.

This non-condensable gas is referred to as non-condensable gas and can be used as a recycle gas for maintaining an oxygen-free atmosphere of the rapid pyrolysis reactor 300 .

Meanwhile, the primary oil recovery device 600 is installed in the gas inlet 602 and may further include a cleaning device 610 for cleaning the inlet of the tube 605.

The cleaning device 610 includes a pump 611 connected to the gas inlet 602 to pump the cleaning solvent, and a spray for spraying the cleaning solvent delivered from the pump 611 toward the inlet of the tube 605. A nozzle 612 and a valve 613 installed between the pump 611 and the injection nozzle 612 to control the flow of the cleaning solvent pumped through the pump 611 may be included.

For example, the gaseous material that has passed through the cyclone 500 contains an oil component and is introduced into the gas inlet 602 of the primary oil recovery device 600. The problem of oil residue sticking to the inlet occurs, and when such oil residue adheres, it leads to problems such as blocking the inlet of the tube 605, and there is a need to frequently clean the oil residue.

Therefore, by periodically spraying the cleaning solvent pumped from the pump 611 using the cleaning device 610 to a portion around the gas inlet 602, it is possible to solve the problem of clogging the inlet of the tube 605.

In addition, in the primary oil recovery device 600, a hot wire may be installed inside the vicinity of the gas inlet 602 to dry moisture after cleaning the cleaning device 610, although not shown in the drawings.

That is, since it is preferable that no moisture remains inside the gas inlet 602 after the cleaning operation is completed through the cleaning device 610, the drying operation can be performed using a hot wire.

Finally, the cooling device 800 is a part for supplying cooling water to the screw cooling reactor 400 and the primary oil recovery device 600.

The cooling device 800 supplies cooling water to the screw cooling reactor 400 and the primary oil recovery unit 600 and circulates the cooling water so that heat exchange of the cooling water occurs and cools the cooling water again, for example, steam- A chiller used to remove heat from the liquid in a compression or absorption refrigeration cycle may be applied.

On the other hand, the mobile rapid pyrolysis system of the present invention may further include a mobile generator (not shown) for supplying power to the entire system.

The mobile generator is a conventional movable engine generator, and may be installed inside or outside the container 10.

Hereinafter, a method for producing pyrolysis oil according to an embodiment of the present invention will be described.

9 is a flowchart of a method for producing pyrolysis oil according to an embodiment of the present invention.

Referring to FIG. 9, in the method for producing pyrolysis oil using unused forest biomass according to an embodiment of the present invention, pyrolysis oil can be produced using the mobile rapid pyrolysis system described above.

The method for producing pyrolysis oil according to an embodiment of the present invention,

a) drying the crushed biomass sample through a dryer;

b) putting the biomass sample dried in step a into a hopper;

c) receiving the dried biomass sample from the hopper and rapidly pyrolyzing the dried biomass sample through a rapid pyrolysis reactor;

d) recovering the biochar obtained from the biomass sample through step c by cooling it through a screw cooling reactor;

e) collecting particles dispersed in the non-condensable gas generated in step c through a cyclone and recovering biochar;

f) condensing the gas transported through step e to primarily recover pyrolysis oil through a primary oil recovery unit;

g) condensing the gas transported through step f to secondarily recover pyrolysis oil through a secondary oil recovery unit;

h) supplying cooling water to the screw cooling reactor and the primary oil recovery unit; and

i) recycling the non-condensable gas discharged from the secondary oil recovery unit to the rapid pyrolysis reactor via a first buffer tank and a second buffer tank;

First, the mobile rapid pyrolysis system of the present invention is moved to the origin of unused forest biomass (1).

Then, using the crusher 2, it is crushed into a biomass sample of a certain size.

Then, the crushed sample is put into the heating chamber 101 of the dryer 100, and is discharged through the discharge port 103 after reducing the moisture content to 5 wt% or less through a drying process.

Then, the dried biomass sample is put into the hopper 200 and temporarily stored.

Then, the biomass sample stored in the hopper 200 is sequentially introduced into the rapid pyrolysis reactor 300 and a rapid pyrolysis process is performed using high heat. At this time, biochar, which is a solid material, is produced in the process of rapid pyrolysis.

Then, the biochar generated and discharged from the rapid pyrolysis reactor 300 is transferred to the screw cooling reactor 400, and after cooling the biochar in the screw cooling reactor 400, it is brought to room temperature through the outlet 403. discharge

Then, the gaseous material remaining in the screw cooling reactor 400 passes through the cyclone 500 to additionally collect solid particles in the uncaptured gas.

Then, the gaseous material of the cyclone 500 undergoes a condensation process in the primary oil recovery unit 600 to primarily recover pyrolysis oil.

Then, the gaseous material passing through the primary oil recovery unit 600 secondarily recovers pyrolysis oil through the secondary oil recovery unit 700.

Then, the non-condensed gas passing through the secondary oil recovery unit 700 is transported to the first buffer tank 900a and the second buffer tank 900b, and recirculation pipe 901 through the exhaust blower 902. ) and is sent to the rapid pyrolysis reactor 300 to be used as a recycle gas.

At this time, cooling water is supplied to the screw cooling reactor 400 and the primary oil recovery unit 600 through the cooling device 800 and circulated to perform the cooling process.

In this way, it is possible to produce pyrolysis oil using the unused forest biomass 1 through a series of processes as described above.

The mobile rapid pyrolysis system and pyrolysis oil production method for utilizing unused forest biomass according to various embodiments according to the technical idea of the present invention is to build a mobile rapid pyrolysis system to convert unused forest biomass into pyrolysis oil directly on site. It can be converted into a form, and by directly converting biomass into the form of pyrolysis oil on site, it is possible to reduce the cost of storing and transporting biomass, which has the effect of improving economic feasibility.

As described above, the optimum embodiment has been disclosed in the drawings and specifications. Although specific terms are used herein, they are only used for the purpose of describing the present invention and are not used to limit the meaning or the scope of the present invention described in the claims. Therefore, those of ordinary skill in the art will understand that various modifications and equivalent other embodiments are possible therefrom. Therefore, the true technical protection scope of the present invention should be determined by the technical spirit of the appended claims.

1: unused forest biomass 2: shredder
10: container 20: conveyance
100: dryer 101: heating chamber
102: inlet 103: outlet
104: screw 105: heating blower
200: hopper 300: rapid pyrolysis reactor
301: pyrolysis reaction chamber 302: inlet
303: outlet 304: screw
305: band heater 400: screw cooling reactor
401: cooling chamber 402: inlet
403: outlet 404: screw
500: cyclone 600: primary oil recovery machine
601: condensation chamber 602: gas inlet
603: gas outlet 604: oil outlet
605: tube 610: washing device
611: pump 612: injection nozzle
613: valve 700: secondary oil recovery
701: condensation chamber 702: gas inlet
703: gas outlet 704: oil outlet
800: cooling device 900a: first buffer tank
900b: second buffer tank 901: recirculation pipe
902: Exhaust blower

Claims (16)

In a mobile rapid pyrolysis system for utilizing unused forest biomass that is built in a container and mounted on a vehicle trailer and can be moved,
A dryer for inputting a biomass sample produced by crushing through a crusher and applying hot air to dry the input biomass sample;
a hopper into which the biomass sample dried through the dryer is put and temporarily stored;
A rapid pyrolysis reactor receiving the dried biomass sample from the hopper and performing rapid pyrolysis;
A screw cooling reactor for cooling and recovering biochar obtained after rapid pyrolysis in the rapid pyrolysis reactor;
a cyclone for collecting particles scattered in the non-condensable gas generated by the pyrolysis reaction of the rapid pyrolysis reactor and recovering biochar;
a primary oil recovery unit for primarily recovering pyrolysis oil by condensing the gas transported through the cyclone;
a secondary oil recovery unit for secondarily recovering pyrolysis oil by condensing the gas transported through the primary oil recovery unit; and
A mobile rapid pyrolysis system comprising a; cooling device for supplying cooling water to the screw cooling reactor and the primary oil recovery unit. According to claim 1,
the dryer,
A cylindrical structure disposed in a horizontal direction, a heating chamber provided with an inlet through which crushed biomass samples are input and an outlet through which dried biomass samples are discharged at the bottom;
a screw installed in the heating chamber in a horizontal direction so that the introduced biomass sample is smoothly stirred; and
A mobile rapid pyrolysis system comprising a; heating blower for blowing hot air into the heating chamber. According to claim 1,
The rapid pyrolysis reactor,
A cylindrical structure disposed in the horizontal direction, provided with an inlet at the upper portion through which the biomass sample discharged from the hopper is input and an outlet through which the rapidly pyrolyzed biomass sample is discharged to be transferred to the screw cooling reactor at the lower portion. A pyrolysis reaction chamber;
a screw installed in the pyrolysis reaction chamber in a horizontal direction so that the biomass sample introduced through the inlet is transported in one direction; and
In order to cause a rapid pyrolysis reaction of the biomass sample transferred from the hopper, a band heater installed inside the pyrolysis reaction chamber to increase the temperature in the pyrolysis reaction chamber; mobile rapid pyrolysis system comprising a. According to claim 1,
The screw cooling reactor,
It is a cylindrical structure arranged in the horizontal direction, and an inlet connected to the outlet of the rapid pyrolysis reactor is provided at the top to input the biochar obtained through the pyrolysis reaction, and an outlet at the bottom to discharge the biochar obtained after cooling treatment is provided. A cooling chamber in which cooling water is received as an isolated space; and
A mobile rapid pyrolysis system comprising a screw installed in the cooling chamber in a horizontal direction so that the biochar introduced through the inlet is transported in one direction. According to claim 1,
The primary oil recovery machine,
As a cylindrical structure disposed in the vertical direction, one side is provided with a gas inlet through which the gas phase transported from the rapid pyrolysis reactor is introduced, and the other side is provided with a gas outlet through which the gas that has undergone the condensation process is discharged, and the pyrolysis oil is provided at the lower end. A condensation chamber provided with an oil discharge port and receiving cooling water into an internal space; and
It is installed inside the condensation chamber, passes after the gas introduced through the gas inlet is condensed, and consists of a plurality of tubes installed to be isolated from the cooling water accommodated in the condensation chamber; characterized in that it comprises a mobile rapid pyrolysis system. According to claim 1,
The secondary oil recovery unit,
As a cylindrical structure disposed in the vertical direction, one side is provided with a gas inlet through which the gas phase transported from the primary oil recovery unit flows in, and the other side is provided with a gas outlet through which the gas that has undergone the condensation process is discharged, and the lower end is provided with pyrolysis oil. A mobile rapid pyrolysis system, characterized in that the electrostatic precipitator or scrubber including a condensation chamber provided with an oil discharge port. According to claim 6,
A first buffer tank installed in communication with the gas outlet of the secondary oil recoverer to recirculate the non-condensable gas discharged through the gas outlet of the secondary oil recovery unit to the rapid pyrolysis reactor. Mobile rapid pyrolysis system. According to claim 7,
A second buffer tank installed to be connected to the rear end of the first buffer tank and connected to a recirculation pipe to the primary oil recovery unit in order to recycle the non-condensable gas passing through the first buffer tank to the rapid pyrolysis reactor Mobile rapid pyrolysis system, characterized in that it comprises. According to claim 8,
Between the first buffer tank and the second buffer tank,
The mobile rapid pyrolysis system further comprises an exhaust blower for blowing the non-condensable gas passing through the first buffer tank so that it can smoothly reach the rapid pyrolysis reactor. According to claim 5,
The primary oil recovery machine,
The mobile rapid pyrolysis system further comprising a cleaning device installed at the gas inlet and cleaning the tube inlet. According to claim 10,
The washing device,
a pump connected to the gas inlet to pump a cleaning solvent;
a spray nozzle for spraying the cleaning solvent delivered from the pump toward the inlet of the tube; and
A mobile rapid pyrolysis system comprising a; valve installed between the pump and the injection nozzle to control the flow of the cleaning solution pumped through the pump. According to claim 11,
The primary oil recovery machine,
A mobile rapid pyrolysis system, characterized in that a hot wire for drying moisture after washing the washing device is built inside the vicinity of the gas inlet. According to claim 2,
The mobile rapid pyrolysis system,
The mobile rapid pyrolysis system further comprising a transfer means for transferring the biomass dried from the dryer to the hopper. According to claim 13,
The means of transport is
A mobile rapid pyrolysis system, characterized in that the conveyor is inclined to transfer the dried biomass sample from the lower side to the upper side from the outlet position of the dryer to the portion where the dried biomass sample is input in the hopper. According to claim 1,
The mobile rapid pyrolysis system,
A mobile rapid pyrolysis system further comprising a mobile generator for supplying power throughout the system. In the method for producing pyrolysis oil using the mobile rapid pyrolysis system of claims 1 to 15,
a) drying the crushed biomass sample through a dryer;
b) putting the biomass sample dried in step a into a hopper;
c) receiving the dried biomass sample from the hopper and rapidly pyrolyzing the dried biomass sample through a rapid pyrolysis reactor;
d) recovering the biochar obtained from the biomass sample through step c by cooling it through a screw cooling reactor;
e) collecting particles dispersed in the non-condensable gas generated in step c through a cyclone and recovering biochar;
f) condensing the gas transported through step e to primarily recover pyrolysis oil through a primary oil recovery unit;
g) condensing the gas transported through step f to secondarily recover pyrolysis oil through a secondary oil recovery unit;
h) supplying cooling water to the screw cooling reactor and the primary oil recovery unit; and
i) recycling the non-condensable gas discharged from the secondary oil recovery unit to the rapid pyrolysis reactor via a first buffer tank and a second buffer tank;

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