JP2008274112A - Bio-coke manufacturing apparatus and method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an apparatus and a method for manufacturing bio-coke that permit efficient mass production of bio-coke. <P>SOLUTION: The bio-coke manufacturing apparatus is one for manufacturing bio-coke by pressure molding ground biomass under heating, where the apparatus is provided with a plurality of reactor cylinders 5; the reactor cylinder 5 is equipped with a feeding part of the ground biomass on one side and a discharging part of bio-coke on the other side thereof; a slidable pushing-side piston 4 and a slidable pulling-side piston 9 are arranged opposite to each other; a heating reaction zone 20 for heating ground biomass and a cooling zone 30 are formed in the reactor cylinder 5; and the ground biomass filled between the pushing-side piston 4 and the pulling-side piston 9 is transferred under pressure in such a manner that the ground biomass is stayed for a predetermined time within each zone by adjusting the differential pressure between the pistons. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  TECHNICAL FIELD The present invention relates to a technology for producing bio-coke using biomass as a raw material, and in particular, a bio-coke production apparatus and method capable of industrially mass-producing bio-coke that can be effectively used as an alternative fuel for coal coke. About.

In recent years, CO ₂ emission reduction has been promoted from the viewpoint of global warming. In particular, in combustion facilities such as boiler power generation, fossil fuels such as coal and heavy oil are often used as fuels. However, these fossil fuels cause global warming due to the problem of CO ₂ emissions, and are effective in protecting the global environment. Its use is being regulated from a viewpoint. In addition, from the viewpoint of depletion of fossil fuels, the development and commercialization of alternative energy resources are required.
Therefore, as an alternative to fossil fuels, the use of fuel using biomass has been promoted. Biomass is an organic substance resulting from photosynthesis, and includes biomass such as wood, vegetation, crops, and moss. By biomass-treating this biomass, the biomass can be effectively used as an energy source or an industrial raw material.

As a method of converting biomass into fuel, a method of drying biomass into fuel, a method of pressurizing to form fuel pellets, a method of carbonizing and carbonizing to dry distillation, and the like are known. However, simply drying the biomass makes it difficult to transport and store because the porosity is large and the specific gravity is low, so it cannot be said that it is effective as a fuel for long-distance transport or storage.
On the other hand, a method for converting biomass into fuel pellets is disclosed in Patent Document 1 (Japanese Patent Publication No. 61-27435). In this method, the water content of the chopped organic fiber material is adjusted to 16 to 28%, and this is compressed in a die and dried to produce fuel pellets.
Further, a method for carbonizing biomass to produce fuel is disclosed in Patent Document 2 (Japanese Patent Laid-Open No. 2003-206490) and the like. This method is a method in which biomass is heated at 200 to 500 ° C., preferably 250 to 400 ° C. in an oxygen-deficient atmosphere to produce a biomass semi-carbonized consolidated fuel precursor.

Japanese Patent Publication No. 61-27435 JP 2003-206490 A

However, in the method described in Patent Document 1, biomass is converted into fuel by performing compression molding. However, since the generated fuel pellet has a large amount of water, it generates a small amount of heat and is not suitable as a fuel.
In addition, as described in Patent Document 2 and the like, the method of converting biomass into fuel by dry distillation has a higher value as a fuel than biomass that is not processed, but it is apparently compared with coal coke. Low specific gravity and low calorific value. Furthermore, since the hardness is lower than that of coal coke, it is insufficient for use as an alternative to coal coke.
Accordingly, in view of the above-described problems of the prior art, an object of the present invention is to provide a bio-coke manufacturing apparatus and method that can efficiently mass-produce bio-coke.

In recent years, bio-coke has been studied as an alternative to coal-coke.
Bio-coke is produced by holding a biomass material in a pressurized and heated state for a certain period of time and then cooling it. The pressurization and heating conditions are set to a pressure range and a temperature range that induce thermal decomposition or thermosetting reaction of hemicellulose and lignin in the pulverized biomass. Thereby, the following reaction mechanism is established, and bio-coke having high hardness and high calorific value can be produced.
The reaction mechanism is that the reaction is carried out under the conditions described above, so that the hemicellulose, which is the fiber component of the pulverized biomass, is thermally decomposed to exhibit an adhesive effect, and the lignin maintains its skeleton by superheated steam generated from the pulverized biomass. By reacting at low temperature and acting synergistically with the consolidation effect, bio-coke with high hardness and high calorific value can be produced. The thermosetting reaction proceeds when a reactive site is induced between phenolic polymers contained in lignin and the like.

FIG. 5 shows a table comparing the physical properties of bio-coke with other fuels. Note that this table only describes experimentally obtained numerical values, and the present invention is not limited to these numerical values.
As shown in this table, the bio-coke has excellent performance in both hardness and flammability with physical properties of apparent specific gravity of 1.2 to 1.38, maximum compressive strength of 60 to 200 MPa, and calorific value of 18 to 23 MJ / kg. The raw woody biomass has an apparent specific gravity of about 0.4 to 0.6, a calorific value of about 17 MJ / kg, and a maximum compressive strength of about 30 MPa. It turns out that it is excellent in. Further, even when compared with physical properties of coal coke, apparent specific gravity of about 1.85, maximum compressive strength of about 15 MPa, and calorific value of about 29 MJ / kg, bio-coke has performance comparable to that of combustibility and hardness.
Therefore, bio-coke is an effective fuel as an alternative to coal-coke and has a high utility value as a material material.

However, this bio-coke is still in the experimental stage, and the actual condition is that the reaction vessel is filled with pulverized biomass manually and manufactured in small amounts in one reaction vessel.
Therefore, the present invention proposes an apparatus and a method for efficiently producing the above-described bio-coke.

The present invention is a bio-coke production apparatus for producing bio-coke by pressure forming while heating a pulverized biomass adjusted to a predetermined moisture content,
A plurality of cylindrical reaction cylinders, a supply portion of the pulverized biomass on one end side of the reaction cylinder, a biocoke discharge portion on the other end side, and a push-side piston slidable on the reaction cylinder; The pull-out side pistons are arranged facing each other,
The pressure range and temperature range in which hemicellulose in the pulverized biomass is thermally decomposed and lignin induces a thermosetting reaction are set,
In the reaction cylinder, a heating reaction region for heating the pulverized biomass to the temperature range and a cooling region for cooling the heated pulverized material are sequentially formed from the supply unit to the discharge unit.
While pressurizing the biomass pulverized material filled between the pushing side piston and the extraction side piston to the pressure range, the differential pressure between these pistons is adjusted, and the biomass pulverized material stays in each region for a predetermined time. It is transported as described above.

According to the present invention, bio-coke that can be used as an alternative to coal coke can be efficiently produced. That is, it is possible to industrially mass produce bio-coke by simultaneously processing the pulverized biomass in a plurality of reaction cylinders.
Moreover, since the residence time in each processing region can be adjusted freely, it can be suitably applied to different types of pulverized biomass. Furthermore, since a long bio-coke can be produced in this embodiment, the size of the bio-coke product can be adjusted.

Further, in each of the pushing side piston and the drawing side piston, a plurality of pistons are integrally connected to a driving device.
As described above, by integrally forming the drive device in the plurality of pistons, simplification of the device and ease of control can be achieved.

Furthermore, in each of the pushing-side piston and the extraction-side piston, a plurality of bio-coke manufacturing apparatuses in which a plurality of pistons are integrally connected to a driving device are provided,
The plurality of bio-coke production apparatuses are characterized in that the pistons are positioned in different processing areas.
Furthermore, each of the pushing side piston and the drawing side piston is configured such that a plurality of pistons are independently controlled by a driving device,
The plurality of reaction cylinders are characterized in that pistons are positioned in different processing areas.
According to these inventions, it is possible to avoid the presence of a plurality of pulverized biomass in one processing region, and to reduce the thermal load in the heating reaction region and the cooling region.

In addition, a bio-coke production method for producing bio-coke by pressure-molding a biomass pulverized product whose water content is adjusted to a predetermined moisture content while heating in a reaction cylinder,
The pressure range and temperature range in which hemicellulose in the biomass pulverized product is thermally decomposed and lignin induces a thermosetting reaction are preset,
A plurality of the reaction cylinders are provided, and the pulverized biomass supplied into the reaction cylinders is moved in the pressure range while being pressurized to the pressure range by the pushing side piston and the drawing side piston. The heating reaction step for heating the pulverized biomass to the above temperature range and the cooling step for cooling the heated pulverized biomass are characterized.
Further, the processing steps are performed with a time difference between the plurality of cylinders.

As described above, according to the present invention, bio-coke having high hardness and high calorific value that can be used as an alternative to coal coke can be efficiently produced.
That is, it is possible to industrially mass-produce bio-coke by performing the treatment while extruding the pulverized biomass in a plurality of reaction cylinders.
Moreover, since the residence time in each processing region can be adjusted freely, it can be suitably applied to different types of pulverized biomass.
Further, by integrally forming the drive device with a plurality of pistons, it is possible to simplify the device and facilitate control.
Furthermore, by making piston positions different from each other in a plurality of cylinders or devices, it is possible to avoid the presence of a plurality of pulverized biomass in one processing region, and to reduce the thermal load in the heating reaction region and the cooling region. .

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the drawings. However, the dimensions, materials, shapes, relative arrangements, and the like of the components described in this embodiment are not intended to limit the scope of the present invention unless otherwise specified, but are merely illustrative examples. Not too much.
1 is an overall configuration diagram of the bio-coke production apparatus of the present embodiment, FIG. 2 is a diagram for explaining the arrangement configuration of the reaction cylinder of the present embodiment, FIG. 3 is a side sectional view showing the filling apparatus of the present embodiment, FIG. These are figures which show the operation timing of a filling apparatus and each cylinder.
In this embodiment, the biomass used as a raw material for bio-coke is an organic substance resulting from photosynthesis, and is a biomass such as wood, grass, crops, and moss. For example, waste wood, thinned wood, pruned branches, etc. , Plants, agricultural waste, and coffee waste such as coffee and tea.

In the present embodiment, the biomass is adjusted in advance so that the biomass has a predetermined moisture content, and a biomass pulverized product that has been pretreated to pulverize to a predetermined particle size or less is used as a raw material.
The bio-coke apparatus of the present embodiment produces bio-coke by cooling the biomass pulverized product under a predetermined pressure and temperature condition, holding it for a certain period of time and then cooling it. The above pressure and temperature conditions are a pressure range and a temperature range that induce thermal decomposition or thermosetting reaction of hemicellulose and lignin in the pulverized biomass. That is, the pressure range and the temperature range in which hemicellulose in the biomass pulverized product is thermally decomposed and lignin induces a thermosetting reaction.

First, with reference to FIG. 1, the whole structure of the bio-coke manufacturing apparatus of a present Example is demonstrated.
The bio-coke manufacturing apparatus is supplied with a pulverized biomass and performs the reaction described above to produce bio-coke, a push-side piston unit that pushes the pulverized biomass in the cylinder from the supply side, and this pulverized biomass. A drawing-side piston unit that presses from the discharge side.
The reaction cylinder 5 is formed in a horizontal cylindrical shape, and a supply portion for the pulverized biomass is provided on one end side thereof, and the supply portion is connected to a pulverized biomass supply device (not shown). On the other end side, a discharge unit for discharging bio-coke produced in the reaction vessel is provided. In this embodiment, a plurality of reaction cylinders 5 are arranged in parallel at a predetermined interval.
FIG. 2 shows an example of the arrangement configuration of the reaction cylinder 5. In the figure, a plurality of reaction cylinders 5 are provided radially.

The pushing side piston unit includes a piston 4 slidably fitted into the reaction cylinder 5, a piston rod 3 connected to the piston 4, a piston head 2 formed at an end of the piston rod 3, Is provided for each cylinder, and a plurality of piston heads 2 are integrally connected to the hydraulic drive device 1. That is, the plurality of pistons 4 reciprocate in the reaction cylinder 5 simultaneously by the hydraulic drive device 1.
Similarly, the extraction-side piston unit is provided with a plurality of extraction-side pistons 9, extraction-side piston rods 8 and extraction-side piston heads 7 that are arranged to face the pushing-side piston 4, and these are the extraction-side hydraulic heads. The drive unit 6 is integrally connected.
The pulverized biomass is filled between the pushing side piston 4 and the extraction side piston 9, and the pulverized biomass is pressurized by the pistons 4 and 9 and moved in the reaction cylinder 5.

In the reaction cylinder 5, a filling region 10, a heating reaction region 20, and a cooling region 30 are formed in order from the biomass pulverized material supply side to the discharge side.
The filling area 10 is an area for filling the reaction cylinder 5 with the pulverized biomass. An example of the specific configuration is shown in FIG. As shown in the figure, in this filling area 10, the biomass pulverized material charged from the pulverized material hopper 11 is transferred to the reaction cylinder 5 side by a spiral blade 13 fixed to a shaft 12 that is rotationally driven, and a predetermined amount is obtained. The biomass pulverized product is filled into the reaction cylinder 5. At this time, the piston 4 is removed from the reaction cylinder 5, and the piston 4 is inserted after filling the pulverized biomass.
Although not shown in the drawings, in the present embodiment, upstream of the biomass pulverized product supply device, the pretreatment device for adjusting the moisture content of the biomass raw material to a predetermined moisture content and pulverizing it to a predetermined particle size or less, and the large diameter produced And a crushing device for crushing bio-coke to a desired size.

  The heating reaction region 20 is provided with a heating means 21 for heating the pulverized biomass in the cylinder to the above temperature range. Examples of the heating means 21 include heating with a heating medium, heating with steam, heating with high-pressure heating water, heating with an induction heater, and the like. FIG. 1 shows a configuration in which heating is performed using a heat medium as an example. This is because the heating reaction region 20 of the reaction cylinder 5 is immersed in a heat medium tank in which a heat medium is stored, and the heat medium in the heat medium tank is circulated between the heat medium tank 22 provided outside. To maintain the heating temperature. The heating medium tank 22 is provided with heating means such as an induction heater 23, detects the temperature in the heating medium tank 22 by the temperature sensor 24, and controls the amount of current supplied to the induction heater 23 to control the heating medium temperature. It is the composition which adjusts.

  The cooling region 30 is provided with a cooling means 31 for cooling the heated biomass pulverized product. Examples of the cooling means 31 include cooling with a refrigerant, air cooling, water cooling, and the like, and it is preferable to have the ability to cool the processed material in the reaction cylinder 5 to 80 ° C. or less, preferably 40 ° C. or less.

Further, in this embodiment, pressure sensors 41 and 42 for detecting the hydraulic pressure of the push-side hydraulic drive device 1 and the extraction-side hydraulic drive device 6 are provided, and the control device 45 controls the push-side piston 4 and the pressure-side piston 4 based on the detected pressure. The pressure of the extraction side piston 9 is adjusted, the pressure applied to the pulverized biomass in the cylinder is set, and the transfer of the pulverized biomass is controlled.
Here, there are the following two methods for treating the pulverized biomass of this example.
One is a method of repeatedly holding the pulverized biomass once in each processing region, starting transfer again after the end of processing, stopping when it reaches the next processing region, and holding it.
The other is a method in which the biomass pulverized product is processed while being constantly transferred at a constant speed so that the pulverized biomass is retained in each processing region for a predetermined time.

In the former method, the pressure applied to the pulverized biomass between the pistons 4 and 9 by the control device 45 is maintained within the pressure range described above, and the differential pressure between the pushing side hydraulic driving device 1 and the drawing side hydraulic driving device 6 is changed. Thus, the operation and stop of the pistons 4 and 9 are controlled. That is, when the transfer is to the pressure P ₁ of the push-side piston 4 is greater than the pressure P ₂ of the pulling-side piston 9, it is controlled so that the pressure difference [Delta] P = P ₁ -P ₂ is constant, to the processing region When it reaches, ΔP = 0 and hold for a predetermined time. When the processing is completed, the transfer is started with ΔP as a predetermined value and transferred to the next processing area. This operation is repeated in all processing areas. When the pulverized biomass is reliably transferred to the processing region, it is preferable to have a configuration for detecting the position of the pulverized biomass in the cylinder. The position detection includes a method of detecting the position of the processing object from the stroke length of the piston, a method of detecting the position of the processing object by providing a position sensor, and the like.

In the latter method, the control device 45 maintains the pressure applied to the pulverized biomass between the pistons 4 and 9 within the above-described pressure range, and the piston generated by the push-side hydraulic drive device 1 and the extraction-side hydraulic drive device 6. The pressure is transferred at a constant speed while maintaining the differential pressure therebetween. That is, the pressure P ₁ of the push-side piston 4 is made larger than the pressure P ₂ of the pulling-side piston 9 is controlled to the differential pressure [Delta] P = P ₁ -P ₂ is constant.

The operation of the bio-coke production apparatus having the above-described configuration will be described including the operation method. Here, a case where the pulverized biomass is temporarily held in each processing region will be described. The numerical ranges such as temperature, pressure, moisture content, size, and the like described here are a preferred example in the present apparatus, but are not limited thereto.
First, as a pretreatment of the pulverized biomass as a raw material, moisture adjustment is performed to dry the moisture content of the biomass to 5 to 10%, and the dried biomass is pulverized to a particle size of 3 mm or less, preferably 0.1 mm or less. Some types of biomass are conditioned after drying and pulverization. As a result, when the biomass is filled into the reaction cylinder 5, the bulk density is improved and uniform filling is possible, the contact between the biomass is increased in the thermoforming, and the hardness after the shaping is also improved.
The pulverized biomass is put into the pulverized product hopper 11. The biomass pulverized material stored in the pulverized material hopper 11 is appropriately supplied into the reaction cylinder 5 by the filling device 14 in the filling region 10. At this time, it is preferable that the biomass pulverized material is simultaneously extruded into two to four reaction cylinders 5 by the filling device 14 and filled so that the specific gravity becomes 0.6 to 1.0.
Thereafter, the filled reaction cylinder 5 is set in a hydraulic system including pistons 4 and 6.

The pulverized biomass filled between the pushing piston 4 and the drawing piston 9 is transferred to the heating reaction region 20. At the time of transfer, the hydraulic pressure of the pushing side piston 4 may be made 1 to 5 Mpa larger than the pressure of the drawing side piston 9 and the hydraulic pressure of the pushing side piston 4 may be controlled based on the speed of the drawing side piston 9. Thereby, it can confirm that the pressurization more than fixed is applied.
The pressure of the pulverized biomass in the heating reaction region 20 is adjusted by the hydraulic drive devices 1 and 6 and is maintained at 8 to 25 MPa. In the heating reaction region 20, the heating means 21 is operated while being pressurized to heat the biomass pulverized product to 115 to 230 ° C. and hold it for a certain time. The holding time is set according to the diameter of the reaction cylinder. For example, when the cylinder diameter is 50 mm, the holding time is 10 to 20 minutes, and when 150 mm, the holding time is 30 to 60 minutes.
By carrying out the reaction under the conditions described above, hemicellulose, which is a component of the biomass pulverized product, is thermally decomposed to develop an adhesive effect, and lignin reacts at a low temperature while maintaining its skeleton by superheated steam generated in the reaction cylinder, By acting synergistically with the compaction effect, bio-coke with high hardness and high calorific value can be produced. The thermosetting reaction proceeds when a reactive site is induced between phenolic polymers contained in lignin and the like.

Thereafter, the pulverized biomass in the cylinder is moved from the heating reaction region 20 to the cooling region 30 and is cooled by the cooling means in the cooling region 30 to 80 ° C. or less, preferably 40 ° C. or less. In addition, when bio-coke is taken out at a temperature higher than this temperature, the adhesion effect due to hemicellulose is lowered, so that it is discharged after cooling.
After cooling, the produced bio-coke is discharged from the reaction cylinder 5. The discharged bio-coke is preferably cut to a desired length by a cutting means (not shown).

  By using the bio-coke production apparatus and method of the present embodiment, it is possible to efficiently produce high-hardness and high calorific bio-coke that can be used as an alternative to coal coke. In addition, the bio-coke produced in this example can be used as a heat source / reducing agent in a cupola, blast furnace, etc. in casting production or iron production, and fuel demand for fired fuel such as boiler fuel for power generation, slaked lime, etc. It can also be used as a material material by taking advantage of properties such as higher compressive strength.

That is, according to the present embodiment, it is possible to industrially mass-produce bio-coke by simultaneously processing the pulverized biomass in the plurality of reaction cylinders 5. Moreover, since the drive devices 1 and 6 are integrally formed with the plurality of pistons 4 and 9, the device can be simplified and the control can be facilitated. Further, since the heating reaction region 20 and the cooling region 30 are performed at different positions, a single heating unit or cooling unit may be provided, and the apparatus configuration is simplified. Furthermore, since the residence time in each processing region can be freely adjusted, it can be suitably applied to different types of pulverized biomass.
Further, when the pulverized biomass is temporarily stopped for each processing region and held for a certain period of time, the length of the reaction cylinder 5 can be shortened, and the apparatus can be reduced in size and saved in space.
Furthermore, when it is set as the structure which carries out a process, always transferring a biomass ground material, the amount of bio-coke manufactured can be increased.

Further, in the bio-coke production apparatus described above, the drive device may be configured such that the piston is independently controlled for each cylinder, and the plurality of reaction cylinders may be controlled so that the pistons are positioned in different processing regions. Good.
As a specific example, FIG. 4 shows the operation timing of the filling device and each cylinder. 4A shows the operation timing of the filling device, FIG. 4B shows the operation timing of the cylinder A, and FIG. 4C shows the operation timing of the cylinder B. Here, a case where processing is performed while continuously moving will be described.

First, the filling device 14 is set, and the cylinder A is filled with the pulverized biomass. In the cylinder A, the filled biomass pulverized material is moved to the heating reaction region 20 while being pressurized by the pistons 4 and 9, and the heating reaction process is performed. At this time, the filling device 14 fills the cylinder B with the pulverized biomass.
When the heating reaction process is completed in the cylinder A and the cooling process is performed by moving to the cooling region, the cylinder B performs the movement of the filled biomass and the heating reaction process. In this way, the filling operation is performed with a time difference so that the processing areas are different in the other cylinders.

By setting it as this structure, it can avoid that several biomass ground material exists in one process area | region, and can reduce the thermal load in a heating reaction area | region and a cooling area | region.
Further, the above-described configuration may be applied to a plurality of bio-coke production apparatuses. This is provided with a plurality of bio-coke production apparatuses provided with an integrated hydraulic drive device, and each bio-coke production apparatus performs processing with a time difference from each other. Thus, the apparatus can be simplified by the integrated hydraulic drive device, and the thermal load can be reduced.

  By using the bio-coke production apparatus according to this embodiment, it is possible to efficiently produce high-hardness and high calorific bio-coke that can be used as an alternative to coal coke. In addition, the bio-coke produced in this example can be used as a heat source / reducing agent in a cupola, blast furnace, etc. in casting production or iron production, and fuel demand for fired fuel such as boiler fuel for power generation, slaked lime, etc. It can also be used as a material material by taking advantage of properties such as higher compressive strength.

It is a whole block diagram of the bio-coke manufacturing apparatus of a present Example. It is a figure explaining the arrangement configuration of the reaction cylinder of this example. It is a sectional side view which shows the filling apparatus of a present Example. It is a figure which shows the operation timing of a filling apparatus and each cylinder. It is a table | surface which compares the physical-property value of bio-coke.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Push-in side hydraulic drive device 4 Push-in side piston 5 Reaction cylinder 6 Pull-out side hydraulic drive device 9 Pull-out side piston 10 Filling area 11 Ground material hopper 20 Heating reaction area 21 Heating device 22 Heat medium tank 23 Induction heater 30 Cooling area 40, 41 Pressure sensor 45 Hydraulic control device

Claims (6)

A bio-coke production apparatus for producing bio-coke by pressure-molding while heating a pulverized biomass adjusted to a predetermined moisture content,
A plurality of cylindrical reaction cylinders, a supply portion of the pulverized biomass on one end side of the reaction cylinder, a biocoke discharge portion on the other end side, and a push-side piston slidable on the reaction cylinder; The pull-out side pistons are arranged facing each other,
The pressure range and temperature range in which hemicellulose in the pulverized biomass is thermally decomposed and lignin induces a thermosetting reaction are set,
In the reaction cylinder, a heating reaction region for heating the pulverized biomass to the temperature range and a cooling region for cooling the heated pulverized material are sequentially formed from the supply unit to the discharge unit.
While pressurizing the biomass pulverized material filled between the pushing side piston and the extraction side piston to the pressure range, the differential pressure between these pistons is adjusted, and the biomass pulverized material stays in each region for a predetermined time. The bio-coke manufacturing apparatus is characterized by being transported as described above.   The bio-coke manufacturing apparatus according to claim 1, wherein a plurality of pistons are integrally connected to a driving device in each of the pushing-side piston and the drawing-side piston. A plurality of bio-coke production apparatuses according to claim 1, wherein a plurality of pistons are integrally connected to a driving device in each of the push-side piston and the extraction-side piston,
The bio-coke production apparatus characterized in that the plurality of bio-coke production apparatuses are configured such that the pistons are located in different treatment areas. In each of the pushing side piston and the drawing side piston, a plurality of pistons are configured to be independently controlled by a driving device,
The bio-coke production apparatus according to claim 1, wherein pistons are positioned in different treatment areas in the plurality of reaction cylinders. A bio-coke production method for producing bio-coke by pressure-molding a biomass pulverized product whose water content has been adjusted to a predetermined moisture content while heating in a reaction cylinder,
The pressure range and temperature range in which hemicellulose in the biomass pulverized product is thermally decomposed and lignin induces a thermosetting reaction are preset,
A plurality of the reaction cylinders are provided, and the pulverized biomass supplied into the reaction cylinders is moved in the pressure range while being pressurized to the pressure range by the pushing side piston and the drawing side piston. A method for producing bio-coke, wherein a heating reaction step of heating the pulverized biomass to the above temperature range and a cooling step of cooling the heated pulverized biomass are performed.   The method for producing bio-coke according to claim 5, wherein each of the processing steps is performed with a time difference between the plurality of cylinders.

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