JP5632200B2 - Water-containing material crusher and method for producing regenerated particles - Google Patents

Description

  The present invention relates to a pulverizer for hydrous materials such as paper sludge and a method for producing regenerated particles using the pulverizer.

  In recent years, various methods for producing recycled particles by heat treating paper sludge have been proposed from the viewpoint of effective use of resources. In producing regenerated particles, it is preferable to control the particle diameter of the papermaking sludge before heat treatment in order to make the quality of the regenerated particles obtained uniform. For example, Patent Document 1 states in paragraph [0017] that “the wastewater sludge is processed with an extruder to form a molded body prior to incineration of the coated paper wastewater sludge in a furnace”. However, when extrusion processing is performed, the production efficiency of regenerated particles is significantly reduced.

  In this respect, a crusher is known as a high-speed device for controlling the particle diameter, and various devices have been developed. However, the conventional crusher uses a rigid object such as wood, waste plastic, plastic bottles, glass, concrete, and waste paper for crushing. That is, water-containing materials such as papermaking sludge have viscosity and are not assumed as processing targets.

  In addition, patent document 2 exists as a crushing apparatus (machine) for construction sludge which is a hydrated material. However, although this document uses an excavated material crushing apparatus, the processing performed to control the particle size is granulation, and the granulation processing also significantly reduces the production efficiency of regenerated particles.

JP 2004-176208 A JP 2004-74031 A

  The main problems to be solved by the present invention are a crusher capable of treating a hydrated product, and a method for producing regenerated particles that can obtain homogeneous regenerated particles but does not cause a decrease in production efficiency. Is to provide.

The present invention that has solved this problem is as follows.
[Invention of Claim 1]
A cylindrical body through which the hydrated material passes, and a plate-like net member that rotates in the cylindrical body,
When the mesh material rotates, the surface of the mesh material is configured to collide with the hydrated substance that is passing from the upper side to the lower side of the cylindrical body ,
In the side view, the lower part of the mesh material is provided behind the upper direction of the mesh material with respect to the rotation direction ,
A hydrated material crusher characterized by that.

[Invention of Claim 2]
The cylindrical body has a cylindrical shape, and the hydrated material inlet is provided in the upper surface opening, the hydrated material outlet is provided in the lower surface opening, and the hydrated material introduced from the inlet drops in the cylindrical body. And is configured to be discharged from the discharge port,
A rotating shaft is provided at the axial center of the cylindrical body,
The mesh material is attached to the rotating shaft body,
The hydrated material crusher according to claim 1.

[Invention of Claim 3]
A method for producing regenerated particles by dehydrating and heat-treating a hydrate containing papermaking sludge as a main material,
The dehydration is performed until the moisture content of the hydrated product becomes 30 to 50%,
The hydrated product after dehydration is crushed to a mean particle size of 2.5 to 12.5 mm using the hydrated product crusher according to claim 1 or claim 2, and then the heat treatment is performed.
A method for producing regenerated particles.

As in the invention according to claim 1, the crusher has a cylinder through which the hydrated substance passes and a plate-like net member that rotates in the cylinder, and when the net member rotates, the surface of the net member It is configured to collide with the hydrated substance that is passing from the upper side to the lower side in the cylinder, and when the lower part of the mesh material is provided rearward with respect to the rotation direction from the upper part of the mesh material in a side view , The generation of ascending air current due to the rotation of the mesh material is prevented, the disturbance of the flow of the water-containing material is prevented, and the water-containing material can be efficiently crushed.

  As in the invention according to claim 2, the crusher has a cylindrical body, the top opening is provided with a hydrated material inlet, the lower surface opening is provided with a hydrated material outlet, and is charged from the inlet. When the hydrated material falls inside the cylinder and is discharged from the discharge port, a rotating shaft body is provided at the axial center of the cylinder, and a net is attached to the rotating shaft body. The hydrated product can be crushed only by installing the crusher on a path along which the hydrated product falls and moves, and a reduction in production efficiency due to the crushed hydrated product can be prevented.

  As in the invention according to claim 3, dehydration is performed until the moisture content of the hydrated product becomes 30 to 50%, and the hydrated product after dehydration is crushed by the hydrated product crusher according to claim 1 or 2. When the heat treatment is performed after crushing to an average particle size of 2.5 to 12.5 mm, excessive heat treatment can be suppressed, and the quality of the regenerated particles obtained can be uniformed, but the production efficiency may be reduced. It becomes the manufacturing method of the reproduction | regeneration particle | grains without this.

It is a schematic diagram of the crusher of this form. It is the II-II arrow directional view of FIG. It is the III-III arrow directional view of FIG. It is a front schematic diagram of a net | network material. It is a figure for demonstrating the effect by a net | network material. It is a figure which shows the modification of the arrangement | positioning form of a net | network material. It is a flowchart which shows the manufacturing process of reproduction | regeneration particle | grains.

Next, an embodiment of the present invention will be described.
(Water-containing material crusher)
The crusher of the present embodiment targets water-containing materials such as paper sludge such as waste paper deinking floss and construction sludge for crushing. The moisture content of the hydrated product is not particularly limited. However, when the moisture content is 30 to 50%, particularly when the moisture content is 35 to 45%, the present crusher functions as an extremely useful one. When the moisture content is low, the viscosity of the hydrated product is also low, so that there is a possibility that it can be crushed without using this crusher. On the other hand, when the moisture content is high and it can be said that it is no longer liquid, it becomes impossible to control the particle diameter regardless of whether or not it is due to crushing.

  When the hydrated material is papermaking sludge, the average particle diameter of the papermaking sludge after dehydration is usually 4 to 100 mm. Here, the “average particle size” is determined by sieving with sieves having different eye holes, measuring the mass of the workpieces subjected to each sieving, and the total value of the measured values corresponds to 50% by mass of the whole. It is the size of the eye hole of the sieve at the stage, and is a value measured using a metal plate sieve based on JIS Z 8801-2: 2000.

  As shown in FIG. 1, the crusher 200 of the present embodiment mainly includes a cylinder 21 through which the hydrated material 10 passes and a net member 31 (31 </ b> A, 31 </ b> B) that rotates in the cylinder 21.

  As shown in FIG. 3, the cylindrical body 21 is a cylinder having a circular cross section. The cross-sectional shape of the cylindrical body 21 may be, for example, an elliptical shape, a polygonal shape, an arbitrary shape, or the like, but is preferably a circular shape. When the net member 31 rotates, an air flow is generated. However, if the cross-sectional shape of the cylindrical body 21 is circular, the air flow is prevented from becoming turbulent, and the particle diameter of the hydrated material 10 is made uniform. Becomes easy. Moreover, when the cross-sectional shape of the cylinder 21 is circular, the hydrated material 10 is prevented from adhering to the inner peripheral surface of the cylinder 21 due to the airflow.

The upper surface opening of the cylindrical body 21 is covered with a top plate 22, and an inlet 23 for the hydrated material 10 is formed in the top plate 22 as shown in FIG. 2. In this embodiment, the hydrated material 10 is charged into the cylinder 21 from the charging port 23. For example, the upper surface opening of the cylinder 21 is not covered with the top plate 22, and the entire upper surface opening is covered with the charging port of the hydrated material 10. You can also

  In the illustrated example, the insertion port 23 has a rectangular shape, but may be, for example, a circular shape, an elliptical shape, a polygonal shape, an arbitrary shape, or the like. Moreover, the number of the inlets 23 is not limited to one, For example, from the viewpoint of making the particle diameter of the hydrate 10 more uniform, a plurality of inlets 23 may be used.

  The lower surface opening of the cylinder 21 is opened, and the hydrated material 10 that has passed through the cylinder 21 is discharged from the lower surface opening. That is, in this embodiment, the entire lower surface opening is the discharge port 24 for the hydrated material 10. The lower surface opening of the cylinder 21 can be covered with a bottom plate or the like (not shown), and a discharge port for the hydrated material 10 can be formed on the bottom plate or the like. However, according to this embodiment, since the hydrated material 10 is crushed on the bottom plate or the like, it is preferable to open the lower surface opening of the cylindrical body 21 as in this embodiment.

  A rotating shaft body 40 is provided at the axial center of the cylindrical body 21. As shown in FIG. 3, the rotary shaft body 40 has a cylindrical shape with a circular cross section, and is arranged so that the axis of the rotary shaft body 40 coincides with the axis of the cylindrical body 21. Yes.

  The rotating shaft body 40 is rotated around the axis by driving means such as a motor (not shown). In the illustrated example, the driving force is transmitted to the upper end portion of the rotating shaft body 40, but the driving force may be transmitted to the lower end portion of the rotating shaft body 40. However, as described above, it is preferable to open the lower surface opening of the cylindrical body 21, so that the driving force is transmitted to the upper end portion of the rotating shaft body 40 so that various members are not arranged as much as possible on the lower surface side. It is preferable to configure as described above.

  As shown in FIG. 1 and FIG. 3, a mesh member 31 (31 </ b> A, 31 </ b> B) is attached to the rotating shaft body 40, and the mesh member 31 (31 </ b> A, 31 </ b> B) is also accompanied with the rotation of the rotating shaft body 40. The cylindrical body 21 (rotating shaft body 40) is configured to rotate about the axis. When the mesh member 31 (31A, 31B) rotates in this way, the surface of the mesh member 31 (31A, 31B) collides with the hydrated material 10 passing through the cylindrical body 21. As a result, the hydrous material 10 is crushed, the average particle size is small and uniform. As shown in FIG. 5A, the hydrated material 10 crushes the hydrated material 10 b passing through the holes 31 </ b> Y of the mesh material 31 from the hydrated material 10 a that has collided with the wire portion 31 </ b> X of the mesh material 31. This is realized. In this respect, since the hydrated product 10 has viscosity, as shown in FIG. 5B, when the hydrated product 10 collides with the simple plate material 39, the hydrated product 10 is not crushed but only flattened. It is.

  As the mesh material 31 (31A, 31B), for example, a metal mesh such as a diamond wire mesh, a crimp wire mesh, a flat top wire mesh, a punching metal, an art metal, an expanded metal, or the like can be used, but an expanded metal is used. Is preferred. As expanded metal is different from punched metal and the like, as shown in an enlarged view in FIG. 4, the diameter L1 of the line portion 31X is uniform over the entire area. Therefore, using expanded metal makes the particle size of the hydrated material 10 uniform. To do. Moreover, although the hydrated substance 10 may adhere to the part (intersection part) where a wire overlaps according to a rhombus metal mesh etc., the said adhesion is prevented according to an expanded metal.

In this embodiment, the network material 31, the diameter L1 of the line portion 31X and 4 to 7 mm, is preferably the area of each hole 31Y and 800～1100Mm ^2, the diameter L1 of the line portion 31X 4.5 to 6 More preferably, it is 0.0 mm, and the area of each hole 31Y is 850 to 1050 mm ² . The average particle diameter of the hydrous material 10 after crushing is normally proportional to the diameter L1 of the line part 31X, but if the area of each hole part 31Y is too small even if the diameter L1 of the line part 31X is the same, the line part is many times. The ratio of the hydrated product 10 that collides with 31X increases, and the particle size distribution (particle size distribution) of the crushed hydrated product 10 may become broad on the small diameter side. In this regard, the shortest separation distance L2 of the line portions 31X surrounding each hole portion 31Y is not particularly limited, but is usually 20 to 30 mm, preferably 21.8 to 26.4 mm. If the shortest separation distance L2 is too short, even if the area of the hole 31Y is within the above range, the particle size of the crushed water-containing product 10 may be broad on the small diameter side.

  On the other hand, even if the diameter L1 of the line part 31X is the same, if the area of each hole part 31Y is too large, the proportion of the hydrated substance 10 that does not collide with the line part 31X increases, and the particle size distribution (particle size distribution) of the crushed hydrated substance 10 May become broad on the large diameter side.

  Here, when an expanded metal is used, as shown in an enlarged view in FIG. 5A, each line portion 31X faces in an oblique direction, where the diameter L1 of each line portion 31X, the area of each hole portion 31Y, and each line. The shortest separation distance L2 of the part 31X is a diameter, an area, and a distance in a front view, respectively.

  In this embodiment, for example, as shown in FIG. 4, the net member 31 can be surrounded by a metal mold 33 to increase the rigidity.

  Further, as shown in FIG. 5, the net member 31 can be provided so that the surface 31 </ b> Z extends in the vertical direction, that is, the surface 31 </ b> Z extends along the axis of the rotating shaft body 40, but as shown in FIG. 1. In addition, it is preferable that the surface 31Z on the rotation destination side of the net member 31 (31A, 31B) is provided so as to be inclined downward. According to this tilting form, it is possible to prevent ascending airflow from being generated with the rotation of the net member 31, and to prevent the flow of the hydrated material 10 descending in the cylindrical body 21 from being disturbed. As a result, the particle size of the hydrous material 10 after crushing is made more uniform (the particle size distribution becomes sharper). Thus, when the net | network material 31 (31A, 31B) is tilted and provided, the tilt angle (alpha) (refer FIG. 1) is not specifically limited, For example, it can be set to 70-90 degrees.

  Further, the number of the net members 31 with respect to the vertical direction is not particularly limited, and may be one, or may be two, three, or more. In the example of FIG. 1, a total of two sheets of an upper mesh material 31 </ b> A and a lower mesh material 31 </ b> B are provided so as to be continuous in the vertical direction.

  In this regard, when attaching the mesh material 31 to the rotary shaft body 40, if it is difficult to attach a plurality of mesh materials 31 in the vertical direction and tilting in relation to the diameter of the rotary shaft body 40, FIG. As shown in FIG. 1, each of the net members 31 </ b> A and 31 </ b> B may be attached to the rotary shaft body 40 via the fixing member 32.

  In this embodiment, as shown in FIG. 6A, the net member 31a is attached so as to extend from the outer peripheral surface of the rotating shaft body 40 toward the inner peripheral surface of the cylindrical body 21, It is attached at two locations that are 180 ° out of plane. However, this attachment can be performed at a plurality of three or more places or at one place. When the net material 31a is increased, the average particle diameter of the obtained hydrous material 10 tends to be small, and when the net material 31a is reduced, the average particle diameter of the obtained hydrous material 10 tends to be large.

  However, the average particle diameter of the obtained hydrate 10 is also related to the rotation speed of the net member 31a (rotating shaft 40), and the average particle diameter of the hydrate 10 obtained when the rotation speed is increased tends to be small. When the rotation speed is lowered, the average particle size of the hydrated product 10 obtained tends to increase. Therefore, according to the crusher 200 of this form, the average particle diameter of the obtained hydrate 10 can be controlled only by changing the rotational speed of the net member 31. Although the rotational speed of the net | network material 31 (rotating shaft 40) is not specifically limited, For example, it can be 200-800 rpm, Preferably it can be 300-500 rpm.

  In addition, for example, as shown in FIG. 6B, a single net member 31b is attached to the outer peripheral surface of the rotating shaft 40b, and the single net member 31b is rotated. As shown in (c), the hydrated material 10 can also be crushed by attaching the net member 31c to the inner peripheral surface of the cylindrical body 21 and rotating the cylindrical body 21 without providing the rotating shaft body. However, it is preferable to provide a rotating shaft body from the viewpoint of simplifying the apparatus configuration.

(Method for producing regenerated particles)
Next, the manufacturing method of the regenerated particle | grains using the crusher 200 of this form is demonstrated.
As shown in FIG. 7, in the manufacturing method of the present embodiment, regenerated particles are manufactured from a hydrate 10 containing papermaking sludge as a main raw material (50% by mass or more).

  The papermaking sludge that is the main raw material of the hydrated material 10 has been transferred into the wastewater without using fiber components such as pulp, organic substances such as starch and synthetic resin adhesive, and inorganic substances such as fillers and coating pigments. Lignin and fine fibers generated in the pulping process, fillers and printing ink derived from waste paper, surplus sludge generated from the biological wastewater treatment process, and the like. Further, for example, it may contain a solid component or the like derived from a deinking process for removing printing ink or the like in a used paper pulp manufacturing process or a cleaning process for recovering and cleaning papermaking raw materials.

  However, in the used paper pulp manufacturing process, in order to continuously produce a used paper pulp having a stable quality, a used paper of a certain quality that has been selected and selected is used. Therefore, the types, ratios, amounts, etc. of inorganic substances brought into the waste paper pulp manufacturing process are basically constant. In addition, even if plastics such as vinyl and film, which cause fluctuations in the unburned rate in the method for producing regenerated particles of this embodiment, are contained in waste paper, these are used in the deinking process in which deinking floss is generated. It is removed with, for example, a pulper, a screen, or a cleaner at the previous stage. Therefore, compared with papermaking sludge generated in other processes such as factory drainage process and papermaking raw material preparation process, deinking floss is a suitable raw material for hydrate 10 for producing regenerated particles with extremely stable quality. Become.

  The hydrous material 10 is dehydrated in the dehydration facility 100 using a known dehydrator or the like. However, this dehydration is performed, for example, by dehydrating until the moisture content of the hydrous material 10 becomes 70 to 90% by a screen, and then dehydrating until the moisture content of the hydrous material 10 becomes 30 to 50% by a screw press. Furthermore, it is preferable to carry out in multiple stages. By performing the dehydration of the hydrous material 10 in multiple stages, rapid dehydration can be avoided, the outflow of the inorganic substance can be suppressed, and the floc of the hydrous material 10 can be prevented from becoming too hard.

Here, “moisture content” of the hydrated product 10 is the time when a constant temperature dryer is used and the sample (hydrated product) is allowed to stand in the dryer and kept at about 105 ° C. for 6 hours or more so that mass fluctuation is not recognized. Is a value calculated from the mass measurement result before and after drying by the following formula.
Moisture content (%) = (mass before drying−mass after drying) ÷ mass before drying × 100

  Prior to the heat treatment in the heat treatment facility 300, the dehydrated water-containing product 10 is crushed by the crusher 200 described above. This crushing is performed so that the average particle diameter of the hydrous material 10 is 2.5 to 12.5 mm, preferably 2.5 to 7.0 mm, and more preferably 2.5 to 4.0 mm. Do as follows. When the average particle diameter of the hydrous material 10 is less than 2.5 mm, excessive heat treatment tends to occur in the subsequent heat treatment. On the other hand, when the average particle diameter of the hydrated product 10 exceeds 12.5 mm, it becomes difficult to uniformly heat-treat the hydrated product 10 from the surface portion to the core portion. For example, as described above, the average particle diameter can be adjusted by adjusting the rotation speed of the mesh member 31 (rotating shaft body 40), the diameter L1 of the line 31X, the area of the hole 31Y, and the line 31X surrounding the hole 31Y. This can be realized by changing the specifications of the net member 31 such as the shortest separation distance L2.

  Here, the “average particle diameter” of the hydrated product 10 is obtained by sieving with a sieve having different eye holes, and measuring the mass of each sieved sample (hydrated product). It is the size of the eye opening of the sieve at a stage corresponding to 50% by mass, and is a value measured using a metal plate sieve based on JIS Z 8801-2: 2000.

  In this embodiment, since the hydrated material 10 is crushed only by the collision of the surface of the mesh member 31 rotating in the cylindrical body 21 with the hydrated material 10 passing through the cylindrical body 21, the production efficiency is reduced. There is no fear. Further, particularly in the illustrated example, the water inlet 10 for the hydrated material 10 is provided on the upper surface of the cylindrical body 21, and the outlet 24 for the hydrated material 10 is provided on the lower surface of the cylindrical body 21. 10 is configured to freely fall within the cylinder 21 and be discharged from the discharge port 24. Therefore, for example, the heat treatment equipment 300 is arranged below the dehydration equipment 100, the hydrated material 10 is dropped freely from the dehydration equipment 100 to the heat treatment equipment 300 through a pipe or the like, and the hydrated material 10 is crushed in the process of this free fall. Can do. According to this form, the change of the existing equipment can be suppressed to the minimum.

  The hydrous material 10 crushed by the crusher 200 is subjected to heat treatment such as drying, pyrolysis, and combustion in the heat treatment equipment 300. This heat treatment can be performed continuously in one apparatus, but at least the drying and the other heat treatment are preferably performed in separate apparatuses.

  As a drying apparatus which dries the hydrated material 10, well-known drying apparatuses, such as a stalker furnace, a fluidized bed furnace, a cyclone furnace, a kiln furnace, can be used, for example. However, in this embodiment, it is preferable to use an “airflow drying device” that dries the hydrated product 10 with a hot airflow. When the air drying apparatus is used, the hydrated product 10 is dried and simultaneously dispersed with a large dispersion force (power for dispersing the hydrated product 10) without applying a compressive force. Other heat treatments that are uniformly dried and that are performed after the main drying process are performed more uniformly and reliably, and regenerated particles with uniform quality can be stably produced. In addition, as an airflow drying apparatus, apparatuses, such as brand name: Kudakera made by Shin Nihonkai Heavy Industries, Ltd., can be illustrated, for example.

  In this embodiment, the temperature for drying the hydrated material 10 is not particularly limited, and can be, for example, 200 to 600 ° C, preferably 300 to 500 ° C, and more preferably 300 to 400 ° C. In this embodiment, since the hydrate 10 is dehydrated and further crushed, it is particularly preferable that the moisture content is 0 to 5% in 1 to 3 seconds, more preferably 0 to 3%. Is dried to a moisture content of 0 to 1%. Further, since the water-containing material 10 is discharged from the drying device at the next moment when the water is evaporated, there is no possibility that unintended heat treatment such as thermal decomposition and combustion of the organic material occurs. The “water content” of the hydrated product 10 is as described above.

  The dried water-containing material 10 (below, since it is dried, hereinafter referred to as the object 10) is thermally decomposed using a known heat treatment apparatus such as a stalker furnace, fluidized bed furnace, cyclone furnace, kiln furnace or the like. Heat treatment such as combustion. Although this heat treatment can be performed by one apparatus, it is preferably performed by two apparatuses provided in series, and more preferably by three apparatuses provided in series.

In addition, when heat treatment is performed separately in three apparatuses, it is preferable to control the temperature in the furnace body so as to increase in order, 250 to 370 ° C. in the first heat treatment apparatus, and 360 to 400 in the second heat treatment apparatus. More preferably, the temperature is controlled to 550 to 780 ° C. in the third heat treatment apparatus. This is for the following reason.
That is, the papermaking sludge that is the main raw material of the object to be treated (hydrated material) 10 contains various organic substances (organic components), and among these organic substances, an acrylic organic substance having a calorific value peak at around 220 ° C. derived from paper. , Cellulose having a calorific value peak at around 320 ° C., and styrenic organic components having a calorific value peak at around 420 ° C. are included. If these organic components are removed by heat treatment together with other organic components, the organic components that are thermally decomposed at 200 to 300 ° C. will ignite and overcombust, making it difficult to control the heat treatment and only reducing the whiteness. In other words, it leads to the generation of hard substances such as gelenite and anorthite. Therefore, first, in the first heat treatment apparatus, predetermined high calorific value components (acrylic organic matter and cellulose) are removed by heat treatment from the object to be treated 10, thereby suppressing overcombustion and suppressing the formation of hard substances. In addition, the first heat treatment apparatus thermally decomposes and gasifies the acrylic organic substance and cellulose contained in the object to be treated 10, and the second heat treatment apparatus thermally decomposes and gasifies the styrene organic substance contained in the object to be treated 10. Thus, the regenerated particles can be obtained uniformly and stably with a large contribution to stabilizing the quality and improving the whiteness of the regenerated particles obtained. In the third heat treatment apparatus, the organic matter containing residual carbon and the like contained in the object to be treated 10 is efficiently removed by heat treatment, and generation of hard substances caused by overcombustion is suppressed. Since the ignition temperature of the pyrolysis gas of cellulose is lower than the pyrolysis temperature of styrene, it is preferable that the cellulose is pyrolyzed and removed in the first heat treatment apparatus, and the styrene is pyrolyzed in the second heat treatment apparatus. is there.

  As the first to third heat treatment apparatuses, a stalker furnace, a fluidized bed furnace, a cyclone furnace, or the like can be used, but a horizontal rotary kiln furnace is preferably used. Further, the horizontal rotary kiln furnace may be an internal heating type with emphasis on heat treatment efficiency or an external heating type with emphasis on ease of heat treatment control. Is preferably an external heating type, and the third heat treatment apparatus is preferably an internal heating type. The object 10 to be processed by the first and second heat treatment apparatuses includes a high calorific value component such as an acrylic organic substance, cellulose, styrene organic substance, etc., so that the object 10 is easily ignited. is there. Therefore, it is preferable that the inside of the furnace body has a low oxygen concentration, and an externally heated kiln furnace is suitably used. On the other hand, the object 10 to be processed by the third heat treatment apparatus does not contain a high calorific value component, so that the object 10 is difficult to ignite and is heat-treated at a relatively high temperature. An internal heat kiln furnace is preferably used.

  The to-be-processed object 10 heat-treated in the heat treatment facility 300 has an average particle diameter of 15.0 μm or less, preferably 0.1 to 10.0 μm, more preferably 1.0 to 5.0 μm. It can grind | pulverize so that it may become.

  The average particle size of the object 10 after pulverization is a volume average value obtained by measuring a slurry of a sample (object to be processed) using a particle size distribution diameter of a laser diffraction method (model number: SA-LD-2200, manufactured by Shimadzu Corporation). The particle diameter (D50).

  In the present embodiment, the method for pulverizing the workpiece 10 is not particularly limited. For example, a dry pulverizer such as a jet mill or a high-speed rotary mill, a wet pulverizer such as an attritor, a sand grinder, or a ball mill can be used. .

  The object to be processed 10 that has been pulverized is preferably an agglomerate, cooled in a cooler or the like, then sorted by a particle size sorter such as a vibration sieve, and temporarily stored in a silo as regenerated particles, Appropriately, it can be used for papermaking fillers and pigments.

Next, a test example of the present invention will be shown to clarify that the crusher of the present invention can treat a hydrated product.
The test which crushes the hydrated material which uses papermaking sludge as a raw material with the crusher of this form (The expanded metal (XG21) by Daishin Steel Co., Ltd. is used as a net | network material) was done. The test was performed several times while changing the rotation speed of the mesh material. The results are shown in Table 1.

  From Table 1, it can be seen that the particle size of the hydrous material after crushing can be controlled only by changing the rotation speed. Moreover, it turns out that combustion stability is inferior also when not crushing and when crushing too much.

  INDUSTRIAL APPLICABILITY The present invention is applicable as a water-containing material crusher such as paper sludge and a method for producing regenerated particles using this crusher.

  DESCRIPTION OF SYMBOLS 10 ... Hydrate (to-be-processed object), 21 ... Cylindrical body, 22 ... Top plate, 23 ... Input port, 24 ... Discharge port, 31, 31A, 31B ... Net material, 40 ... Rotary shaft, 100 ... Dehydration equipment, 200: Crusher, 300: Heat treatment equipment.

Claims (3)

A cylindrical body through which the hydrated material passes, and a plate-like net member that rotates in the cylindrical body,
When the mesh material rotates, the surface of the mesh material is configured to collide with the hydrated substance that is passing from the upper side to the lower side of the cylindrical body ,
In the side view, the lower part of the mesh material is provided behind the upper direction of the mesh material with respect to the rotation direction ,
A hydrated material crusher characterized by that. The cylindrical body has a cylindrical shape, and the hydrated material inlet is provided in the upper surface opening, the hydrated material outlet is provided in the lower surface opening, and the hydrated material introduced from the inlet drops in the cylindrical body. And is configured to be discharged from the discharge port,
A rotating shaft is provided at the axial center of the cylindrical body,
The mesh material is attached to the rotating shaft body,
The hydrated material crusher according to claim 1. A method for producing regenerated particles by dehydrating and heat-treating a hydrate containing papermaking sludge as a main material,
The dehydration is performed until the moisture content of the hydrated product becomes 30 to 50%,
The hydrated product after dehydration is crushed to a mean particle size of 2.5 to 12.5 mm using the hydrated product crusher according to claim 1 or claim 2, and then the heat treatment is performed.
A method for producing regenerated particles.

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