WO2014103909A1

WO2014103909A1 - Pulverizer

Info

Publication number: WO2014103909A1
Application number: PCT/JP2013/084198
Authority: WO
Inventors: 裕智 ▲高▼浪; 徹也児島
Original assignee: 株式会社アーステクニカ
Priority date: 2012-12-27
Filing date: 2013-12-20
Publication date: 2014-07-03
Also published as: JP5931714B2; JP2014124609A; AU2013367402A1; CN103894261B; CN103894261A; CN203750599U; AU2013367402B2

Abstract

[Problem] To provide a pulverizer wherein the temperature of the inner surface of the liner can be efficiently adjusted. [Solution] The pulverizer (10) is provided with: a rotator (15); striking members (16) installed on the rotator (15) for colliding with brown coal (13); collision plates (20) disposed around the rotator (15); and liners (30) provided on the inner surfaces (21) of the collision plates (20) and having an inner surface (31) onto which brown coal (13) that has collided with the striking members (16) is thrown. The pulverizer (10) also is provided with a temperature adjustment mechanism (40) for adjusting the temperature of the inner surface (31) of a liner (30). The temperature adjustment mechanism (40) is configured so as to be capable of adjusting the temperature of the liner (30) further to the inside than the inner surface (21) of the collision plates (20).

Description

Crusher

The present invention relates to a pulverizer that pulverizes an object such as coal, and more particularly, to a pulverizer that pulverizes a highly adherent object that contains a large amount of moisture such as lignite or lignite.

In recent years, the consumption of energy resources has been rapidly increasing worldwide, and the prices of major energy sources such as oil, coal or natural gas have been rising. For this reason, how to effectively use these energy sources is an important issue.

瀝 As the coal used as fuel, bituminous coal with a high calorific value is usually used. However, with the economic growth in emerging countries, the supply and demand for bituminous coal is tightening worldwide. On the other hand, reserves of low-grade coal such as lignite, lignite or sub-bituminous coal are estimated to surpass reserves of high-grade coal such as bituminous coal. For this reason, research on the effective use of low-grade coal is underway.

As a pulverizer for pulverizing coal, a pulverizer for pulverizing coal using an impact force such as a Hanmark lasher is known. However, the moisture content of low-grade coal is as high as 50 to 60%, so that the pulverized coal tends to adhere to the surface of a hammer or liner. If a large amount of coal adheres to the surface of the hammer or liner, there is a concern that the efficiency of the pulverization process may be reduced and the inside of the pulverizer may be blocked.

In order to solve such a problem, Patent Document 1 proposes a pulverizer configured to pass a cooling or heating fluid. In the pulverizer described in Patent Document 1, it is intended to reduce the adhesion of coal by cooling or heating the liner using a fluid.

Japanese Patent Laid-Open No. 11-276916

In Patent Document 1, the cooling or heating fluid passes through the outer surface of the collision plate. Thus, heat transfer between the fluid and the liner occurs through the impingement plate. However, it is usually difficult to process the collision plate and the liner so that the inner surface of the collision plate and the outer surface of the liner are completely adhered to each other. For this reason, it is considered that a loss of heat conduction occurs to some extent at the interface between the collision plate and the liner. Patent Document 1 proposes that a synthetic resin be interposed between the inner surface of the collision plate and the outer surface of the liner in order to eliminate such heat conduction loss. However, even if such a synthetic resin is used, the loss of heat conduction cannot be completely eliminated. Thus, in the conventional pulverizer, efficient temperature adjustment of the liner has not been realized.

The present invention aims to provide a pulverizer that can effectively solve such problems.

1st this invention is a grinder which grind | pulverizes a target object, Comprising: The impact member attached to the said rotary body and colliding with a target object, The collision board arrange | positioned around the said rotary body, A liner provided on an inner surface of the collision plate and having an inner surface on which an object colliding with the impact member is hit, and a temperature adjusting mechanism for adjusting the temperature of the inner surface of the liner, are provided in a crushing space inside the casing. The temperature adjusting mechanism is a pulverizer configured to be able to adjust the temperature of the liner inside the inner surface of the collision plate.

In the pulverizer according to the present invention, the temperature adjustment mechanism may include a temperature adjustment medium supply unit that supplies a temperature adjustment medium to a flow path that is disposed inside the inner surface of the collision plate.

In the pulverizer according to the present invention, a flow path through which the temperature adjusting medium passes may be formed inside the liner.

In the pulverizer according to the present invention, a heat insulating member may be interposed between the flow path formed inside the liner and the inner surface of the collision plate.

In the pulverizer according to the present invention, the temperature adjustment medium supply unit may supply the flow path with the temperature adjustment medium having a temperature higher than the temperature of an object to be charged into the pulverizer. Alternatively, the temperature adjustment medium supply unit may supply the flow path with the temperature adjustment medium having a temperature lower than the temperature of the object to be charged into the pulverizer.

In the pulverizer according to the present invention, the temperature adjusting mechanism may include an electric heater disposed inside the inner surface of the collision plate.

In the pulverizer according to the present invention, the liner may be composed of a plurality of liner members arranged along a track around which a tip of the impact member circulates. The shape of each liner member is not particularly limited and can be arbitrarily set.

In the pulverizer according to the present invention, the temperature adjustment mechanism may be configured to independently adjust the temperatures of the inner surfaces of at least two liner members among the plurality of liner members.

The second aspect of the present invention is a pulverizer for pulverizing an object, a rotating body, an impact member attached to the rotating body and colliding with the object, a collision plate disposed around the rotating body, and A casing, a casing liner provided on the inner surface of the casing and having an inner surface on which a part of an object colliding with the impact member and the collision plate can be diffused and adhered, and the temperature of the inner surface of the casing liner is adjusted. A temperature adjusting mechanism, wherein the temperature adjusting mechanism is configured to adjust the temperature of the casing liner inside the inner surface of the casing.

In the pulverizer according to the first aspect of the present invention, the temperature adjusting mechanism is configured to be able to adjust the temperature of the liner inside the inner surface of the collision plate. For this reason, heat conduction to the liner can be realized with low loss. Thereby, the temperature of the inner surface of the liner can be adjusted efficiently.
In the pulverizer according to the second aspect of the present invention, the temperature adjusting mechanism is configured to adjust the temperature of the casing liner inside the inner surface of the casing. For this reason, heat conduction to the casing liner can be realized with low loss. Thereby, the temperature of the inner surface of the casing liner can be adjusted efficiently.

FIG. 1 is a front view showing a pulverizer according to an embodiment of the present invention. FIG. 2 is an enlarged front view showing a liner of the crusher of FIG. FIG. 3A is a side view showing a case where the first liner member of the liner of the crusher of FIG. 1 is viewed from the side. 3B is a cross-sectional view showing the first liner member of FIG. 3A viewed from the IIIB-IIIB direction. FIG. 4A is a side view showing the second or third liner member of the liner of the crusher of FIG. 1 as viewed from the side. 4B is a cross-sectional view showing the second or third liner member of FIG. 4A viewed from the IVB-IVB direction. FIG. 5A is a diagram showing how lignite adheres to the inner surface of the liner. FIG. 5B is a diagram showing how lignite attached to the liner is heated. FIG. 5C is a diagram showing a state where heated lignite is peeled off from the liner. 6A is an enlarged front view showing a liner of a pulverizer according to a modification of the embodiment shown in FIG. 6B is a cross-sectional view showing the liner of FIG. 6A viewed from the VIB-VIB direction. FIG. 7 is a side view showing the pulverizer, and is a view showing a modification of the embodiment shown in FIG. 1.

Hereinafter, a pulverizer according to an embodiment of the present invention will be described with reference to FIGS. 1 to 5C.

FIG. 1 is a front view showing the pulverizer 10. FIG. 1 shows a cross section when the pulverizer 10 is cut along a plane orthogonal to the axial direction of the rotating body of the pulverizer 10. The pulverizer 10 applies an impact to an object to be input into the pulverization space 14 inside the casing 18 from the charging port 11 formed in the casing 18, thereby pulverizing the object. The crushed object is discharged from the discharge port 12.

The pulverizer 10 includes a rotator 15 and a plurality of impact members 16 attached to the rotator 15 in the pulverizing space 14 inside the casing 18. Each impact member 16 is attached to the rotating body 15 at regular intervals along the circumferential direction of the rotating body 15. For example, a hammer is used as the impact member 16. As shown in FIG. 1, each impact member 16 may be attached to the rotating body 15 via a shaft 16 a that is hinged so that the impact member 16 can rotate therearound. As a result, each impact member 16 can swing about the shaft 16a. Although not shown, each impact member 16 may be fixed to the rotating body 15 so that such swinging does not occur.

The pulverizer 10 further includes a collision plate 20 disposed around the rotating body 15 and a liner 30 provided on the inner surface 21 of the collision plate 20. The inner surface 21 of the collision plate 20 is configured to have a substantially arc-shaped outline. The collision plate 20 and the liner 30 are made of, for example, a steel material. Further, the collision plate 20 has a structure capable of appropriately adjusting the gap between the end portion orbit of the impact member 16 and the liner 30 according to the wear state of the liner 30 and the necessity of adjusting the product particle size. May be.

The liner 30 has an inner surface 31 on which an object colliding with the impact member 16 is hit. As shown in FIG. 1, the inner surface 31 of the liner 30 may have a saw-like shape. Thereby, the target object struck to the liner 30 can be effectively pulverized.

As shown in FIG. 1, the liner 30 may be divided into a plurality of liner members along a circular track (tip circular track) around which the tip of the impact member 16 circulates. For example, the liner 30 includes a first liner member 30 A, a second liner member 30 B, and a third liner member 30 C that are arranged in order along the distal-end circular track from the input port 11 toward the discharge port 12. Thus, by dividing the liner 30 into a plurality of liner members, installation and maintenance of the pulverizer 10 can be facilitated.

Further, at least two liner members among the plurality of liner members may have the same shape. For example, in the example shown in FIG. 1, the second liner member 30B and the third liner member 30C have the same shape. That is, the liner members 30 B and 30 C both have the same length, and have a shape that is similarly curved along the distal end orbit of the impact member 16. Thus, by sharing a part of the plurality of liner members, it is possible to improve the ease of procurement and handling of parts.

As shown in FIG. 1, the first liner member 30 A disposed in the vicinity of the insertion port 11 may have a linearly extending shape. Thereby, compared with the case where 30 A of 1st liner members have the shape curved along the rotation track | orbit of the impact member 16, the area of the insertion port 11 can be ensured widely. When the first liner member 30A has a linear shape, the first liner member 30A may have a different length from the

other liner members

30B and 30C.

The pulverizer 10 is provided with a temperature adjustment mechanism 40 that adjusts the temperature of the inner surface 31 of the liner 30. Hereinafter, the temperature adjustment mechanism 40 will be described.

First, the background for providing the temperature adjustment mechanism 40 will be described. As described above, the moisture content in low-grade coal such as lignite is as high as 50 to 60%. When such low-grade coal is introduced into the pulverizer 10, the low-grade coal may adhere to the impact member 16 or the inner surface 31 of the liner 30. In this case, since the low-grade coal adhering to the impact member 16 is subjected to centrifugal force or impact force with the newly supplied processing object, the low-grade coal is expected to be peeled off from the impact member 16. . On the other hand, the liner 30 is normally fixed. For this reason, low-grade coal with a lot of moisture adhering to the inner surface 31 of the liner 30 has a strong tendency to accumulate, and cannot be expected to peel off naturally. If the low-grade coal adhering to the inner surface 31 of the liner 30 is cumulatively increased, the efficiency of pulverization when the low-grade coal is struck against the liner 30 is reduced, and the pulverization space 14 is severely blocked. It is not preferable because it can be considered. Therefore, it is desirable to remove the low-grade coal adhering to the inner surface 31 of the liner 30.

It is considered that the adhesion of the low-grade coal to the inner surface 31 of the liner 30 is mainly caused by a large amount of moisture contained in the low-grade coal. Accordingly, it is expected that the adhesion of the low-grade coal to the inner surface 31 will be reduced if the moisture content of at least the portion in contact with the inner surface 31 of the low-grade coal adhering to the inner surface 31 of the liner 30 is reduced. The The temperature adjusting mechanism 40 described above is provided in consideration of such points. That is, the temperature adjustment mechanism 40 heats the low-grade coal adhering to the inner surface 31 of the liner 30 to reduce the moisture content of the low-grade coal, thereby making it easy to peel off the low-grade coal from the inner surface 31 of the liner 30. belongs to.

Hereinafter, a specific configuration of the temperature adjustment mechanism 40 will be described with reference to FIGS. 1 to 4B. FIG. 2 is an enlarged front view showing the liner of the pulverizer of FIG. FIG. 3A is a side view showing the first liner member 30A of the liner 30 of FIG. 1 as viewed along the normal direction of the outer surface of the first liner member 30A. FIG. 3B is a cross-sectional view showing the first liner member 30A of FIG. 3A viewed from the IIIB-IIIB direction. 4A is a side view showing a case where the second liner member 30B or the third liner member 30C of the liner 30 of FIG. 1 is viewed along the normal direction of the outer surfaces of the

liner members

30B and 30C. 4B is a cross-sectional view showing the second liner member 30B or the third liner member 30C of FIG. 4A as viewed from the IVB-IVB direction.

As shown in FIGS. 1 and 2, the temperature adjustment mechanism 40 includes a temperature adjustment medium supply unit 41 that supplies a temperature adjustment medium 42 toward the liner 30 and a supply pipe through which the temperature adjustment medium 42 supplied to the liner 30 passes. 43 and a discharge pipe 44 through which the temperature adjusting medium 42 discharged from the liner 30 passes. The supply pipe 43 and the discharge pipe 44 may be metal pipes, or may be pipes having resistance and flexibility with respect to the displacement and impact of the impact plate 20 such as a flexible hose and a rubber hose. Good. The temperature adjustment medium 42 is supplied to the flow path 33 disposed inside the inner surface 21 of the collision plate 20. The temperature adjustment medium 42 supplied to the flow path 33 is set to a temperature higher than the temperature of the low-grade coal supplied to the pulverizer 10. For example, the temperature of the low-grade coal supplied to the pulverizer 10 is usually about atmospheric temperature, while the temperature of the temperature adjustment medium 42 is about 100 ° C. In addition, when the temperature of the temperature control medium 42 becomes too high, there is a concern that the liner 30 and the low-grade coal are excessively heated, and thereby the low-grade coal is ignited. Therefore, the temperature adjustment medium 42 is adjusted so as not to become excessively high. Such a type of the temperature adjusting medium 42 can be arbitrarily adopted. For example, low-pressure saturated steam generated by a steam boiler or the like is used.

The flow path 33 may be formed inside each

liner member

30A, 30B, 30C of the liner 30 as shown in FIGS. 2 to 4B. 3A and 4A, the flow paths 33 formed in the

liner members

30A, 30B, and 30C are indicated by dotted lines. 3A and 4A, reference numeral 35 a represents an inlet 35 a for injecting the temperature adjustment medium 42 into the flow path 33, and reference numeral 35 b represents a discharge for discharging the temperature adjustment medium 42 from the flow path 33. The outlet 35b is shown. When the temperature adjustment medium 42 is saturated steam, the saturated steam exchanges heat between the liner 30 and the low-grade coal while passing through the flow path 33 in the liner 30. As a result, the saturated steam is condensed. May become water. For this reason, it is conceivable that the temperature adjustment medium 42 is discharged from the discharge port 35b in a liquid state. In consideration of such points, the discharge port 35b may be formed below the injection port 35a. Further, the shape and arrangement of the inlet and outlet and the connection method with the supply pipe 43 and the outlet pipe 44 can be arbitrarily adopted as design matters.

The method for supplying the temperature adjusting medium 42 that has passed through the supply pipe 43 to the flow path 33 of the liner 30 is not particularly limited. For example, the supply pipe 43 and the discharge pipe 44 may be connected to the inlet 35a and the outlet 35b of the liner 30, respectively. In this case, a through hole or notch for passing the supply pipe 43 and the discharge pipe 44 may be formed in the collision plate 20. Alternatively, as shown in FIG. 2, the supply pipe 43, the discharge pipe 44, the injection port 35 a, and the discharge port 35 b may be connected via a flow path 23 formed inside the collision plate 20.

According to the present embodiment, the temperature adjustment medium 42 is supplied to the flow path 33 arranged inside the inner surface 21 of the collision plate 20. That is, the temperature adjustment medium 42 of the temperature adjustment mechanism 40 directly contacts the liner 30 inside the inner surface of the collision plate 20. For this reason, the temperature of the liner 30 can be adjusted inside the inner surface of the collision plate 20. Therefore, the heat of the temperature adjusting medium 42 can be conducted to the liner 30 with a low loss as compared with the case where a structural member for mounting the liner is interposed between the temperature adjusting medium and the liner as in the prior art. it can. For this reason, the inner surface 31 of the liner 30 can be efficiently heated.

Preferably, as shown in FIGS. 3B and 4B, the heat of the temperature adjusting medium 42 flows between the flow path 33 formed inside the liner 30 and the inner surface 21 of the collision plate 20 toward the collision plate 20. A heat insulating member 36 for preventing conduction is interposed. Thereby, the heat of the temperature adjusting medium 42 can be conducted to the liner 30 with lower loss. As the heat insulating member 36, for example, a heat insulating material is attached to a back plate 37 that closes the flow path 33. In this case, as the back plate 37, for example, an iron plate is used. Further, the back plate 37 itself for closing the flow path 33 may be made of a material having heat insulation properties. In FIG. 1, the temperature adjustment mechanism 40 is provided only for the liner 30 located on the left side, but the temperature adjustment mechanism 40 may be provided similarly for the liner 30 located on the right side. .

3A and 4A, a fastening hole 34 for fastening the liner 30 to the collision plate 20 is formed on the outer surface 32 of the

liner members

30A, 30B, and 30C. May be.

Next, the operation when pulverizing an object such as lignite using the above-described pulverizer 10 will be described with reference to FIGS. 5A to 5C.

First, an object such as lignite 13 is introduced through the inlet 11. The introduced lignite 13 collides with the rotating impact member 16 and is then struck against the inner surface 31 of the liner 30. In FIG. 5A, lignite 13 that is struck against the inner surface 31 and adhered to the inner surface 31, and lignite 13 that is scattered toward the inner surface 31 are shown.

Since the lignite 13 scatters one after another toward the inner surface 31, the lignite 13 attached to the inner surface 31 increases as shown in FIG. 5B. On the other hand, as described above, the temperature adjustment medium 42 having a temperature higher than that of the lignite 13 flows through the flow path 33 formed inside the liner 30. Therefore, the lignite 13 is heated by the temperature adjustment medium 42. Since this heating is caused by heat conducted from the temperature adjusting medium 42 via the liner 30, the portion of the lignite 13 that is in contact with the inner surface 31 is preferentially heated. Therefore, the moisture content of the portion in contact with the inner surface 31 of the lignite 13 is lower than the moisture content of other portions of the lignite 13 due to evaporation and movement of water caused by heating. As a result, as shown in FIG. 5B, a portion of the lignite 13 that is in contact with the inner surface 31 becomes a dry portion 13a in which the moisture content is reduced.

As described above, it is considered that the low-grade coal adhesion to the inner surface 31 of the liner 30 is mainly caused by a large amount of moisture contained in the low-grade coal. Here, according to this Embodiment, the adhesiveness of the lignite 13 with respect to the inner surface 31 can be reduced by drying the part which is contacting the inner surface 31 among the lignite 13. In this case, as shown in FIG. 5C, the inner surface is triggered by the force received from the swirling flow generated by the rotation of the rotating body 15 and the impact member 16 or the force received from the lignite 13 scattered toward the inner surface 31. It is expected that the lignite 13 adhering to 31 is peeled off from the inner surface 31.

Thus, according to the present embodiment, the lignite 13 can be peeled from the inner surface 31 of the liner 30 by heating the lignite 13. Moreover, according to this Embodiment, the lignite 13 can be peeled from the inner surface 31 by drying the part mainly contacting the inner surface 31 among the lignite 13. For this reason, for example, compared with the case where the whole grinding | pulverization space 14 is heated and the whole surface of the lignite 13 is dried, the heat energy required in order to peel the lignite 13 can be reduced. Moreover, the danger that the lignite 13 will ignite can be reduced. Further, according to the present embodiment, the temperature adjustment mechanism 40 is configured to contact the liner 30 inside the inner surface 21 of the collision plate 20. For this reason, heat conduction with the liner 30 can be realized with low loss. Therefore, the inner surface 31 of the liner 30 can be efficiently heated. Thus, according to this Embodiment, the brown coal 13 adhering to the inner surface 31 of the liner 30 can be efficiently removed with less heat energy due to the synergistic effect of these characteristics.

Note that various modifications can be made to the above-described embodiment. Hereinafter, an example of modification will be described with reference to the drawings. In the following description and the drawings used in the following description, the same reference numerals as those used for the corresponding parts in the above embodiment are used for the parts that can be configured in the same manner as in the above embodiment. A duplicate description is omitted.

In the above-described embodiment, an example in which the temperature of the temperature adjustment medium 42 is adjusted to about 100 ° C. has been shown. However, the temperature of the temperature adjustment medium 42 need not be uniformly adjusted to the same temperature, and the temperature of the temperature adjustment medium 42 may be changed according to the position of the liner 30. For example, when the liner is divided into the plurality of

liner members

30A, 30B, and 30C as described above, the temperature adjustment mechanism 40 is provided on the inner surface 31 of at least two liner members among the plurality of

liner members

30A, 30B, and 30C. You may be comprised so that temperature can be adjusted independently. Hereinafter, the effect of this modification will be described.

The driving force for peeling the lignite 13 adhering to the inner surface 31 of the liner 30 from the inner surface 31 is in addition to the force received from the swirl flow generated by the collision of the pulverized processed material and the rotation of the rotating body 15 and the impact member 16. The gravity which acts on the lignite 13 adhering to the inner surface 31 is considered. On the other hand, the usefulness of gravity in peeling the lignite 13 from the inner surface 31 of the liner 30 depends on the orientation of the inner surface 31 of the liner 30. For example, in the pulverizer 10 shown in FIG. 1, the lignite 13 attached to the first liner member 30A is more easily peeled off due to the influence of gravity than the lignite 13 attached to the second liner member 30B or the third liner member 30C. It is thought that it has become. Thus, the ease of peeling of the lignite 13 may differ depending on the position of the liner 30 to which the lignite 13 is attached. Here, according to this modification, the temperature adjustment mechanism 40 can adjust the temperature of each

liner member

30A, 30B, 30C independently. For example, the control of supplying the temperature adjusting medium 42 only to the second liner member 30B and the third liner member 30C without supplying the temperature adjusting medium 42 to the first liner member 30A may be performed. it can. Accordingly, the second liner member 30B and the third liner member 30C can be intensively heated compared to the first liner member 30A. As a result, the overall thermal energy can be reduced while achieving the purpose of peeling off the lignite 13 adhering to the liner 30.
Moreover, the adhesion amount of the brown coal 13 with respect to the liner 30 may change with places. Also in this case, according to the present embodiment, by independently adjusting the temperature of each

liner member

30A, 30B, 30C, it is possible to selectively heat the liner member to which lignite 13 easily adheres, The lignite 13 can be peeled off efficiently. Also in this case, the overall thermal energy can be reduced while achieving the purpose of peeling the lignite 13 adhering to the liner 30.

The specific configuration of the temperature adjustment mechanism 40 for independently adjusting the temperatures of the

liner members

30A, 30B, and 30C is not particularly limited, and various configurations can be employed. For example, as shown in FIG. 1, an adjustment valve 45 for adjusting the flow rate of the temperature adjustment medium 42 is provided in each of the supply pipes 43 for supplying the temperature adjustment medium 42 to the

liner members

30A, 30B, 30C. It may be.

Further, in the above-described embodiment and modification examples, the example in which the temperature adjustment mechanism 40 heats the liner 30 using the temperature adjustment medium 42 has been shown. However, the method for heating the liner 30 is not limited to this. For example, as shown in FIGS. 6A and 6B, the temperature adjustment mechanism 40 heats the liner 30 using a heater 46 that is disposed on the inner side 21 of the collision plate 20 or embedded in the liner 30. Also good. For example, the heater 46 is disposed inside the accommodation space 39 formed in the liner 30. In this case, as shown in FIG. 6A, an inlet 38 for introducing the heater 46 into the accommodation space 39 may be formed in the liner 30. Also in this modification, the heat of the heater 46 can be conducted to the liner 30 with low loss compared to the case where the collision plate 20 is interposed between the heater 46 and the liner 30. For this reason, the inner surface 31 of the liner 30 can be efficiently heated. As the heater 46, an electrothermal heat transfer heater, a high-frequency heater, or the like can be used.

Moreover, in this Embodiment and each modification mentioned above, the example in which the temperature adjustment mechanism 40 was comprised so that the liner 30 might be heated was shown. However, the present invention is not limited to this, and the temperature adjustment mechanism 40 may be configured to cool the liner 30 to a temperature lower than that of the lignite 13. For example, the temperature adjustment medium 42 supplied to the flow path 33 of the liner 30 may have a temperature lower than that of the lignite 13. In this case, the adhesion of the lignite 13 to the inner surface 31 of the liner 30 can be reduced by cooling and solidifying the water contained in the lignite 13.
In addition, in the case of subjecting a processing object that is tough and viscoelastic and difficult to pulverize to normal temperature, such as rubber or plastic, by using liquid nitrogen as the temperature adjusting medium 42, the temperature according to the present embodiment The adjustment mechanism 40 can be used to suppress the temperature rise of the inner surface 31 of the liner 30 due to pulverization heat, thereby preventing the processing object from being softened.

Further, in the above-described embodiment and each modification, an example in which the lignite 13 is pulverized by the pulverizer 10 is shown. However, the object to be crushed by the pulverizer 10 is not limited to the lignite 13. The pulverizer 10 according to the present embodiment and each modified example efficiently pulverizes objects containing a large amount of water, such as low-grade coal including lignite or sub-bituminous coal, and biomass raw materials, in addition to lignite 13. Can do.

Further, the technical idea described in the above-described embodiment and each modification may be applied to the casing liner 50 provided on the inner surface of the casing 18, as shown in FIG. On the inner surface of the casing liner 50, a part of an object such as lignite 13 colliding with the impact member 16 and the impact plate 20, particularly in a place where the peripheral speed of the impact member 16 is low, such as in the vicinity of both end portions of the rotating body 15. It can be diffused and struck to adhere. For this reason, it is effective to adjust the temperature of the casing liner 50 similarly to the liner 30 provided on the collision plate 20.

FIG. 7 is a side view showing the pulverizer 10. FIG. 7 shows a cross section when the pulverizer 10 is cut along a vertical plane passing through the axis of the drive shaft 19 that drives the rotating body 15. In the modification shown in FIG. 7, the temperature adjustment mechanism 40 adjusts the temperature of the inner surface of the casing liner 50 in addition to the temperature of the inner surface of the liner 30 provided on the collision plate 20 or separately from the temperature of the inner surface of the liner 30. adjust. Specifically, the temperature adjustment mechanism 40 is configured to adjust the temperature of the casing liner 50 on the inner side of the inner surface of the casing 18 as in the case of the present embodiment and the modifications described above. For this reason, heat conduction to the casing liner 50 can be realized with low loss. Thereby, the temperature of the inner surface of the casing liner 50 can be adjusted efficiently. Thereby, the lignite 13 adhering to the inner surface of the casing liner 50 can be efficiently removed with less heat energy. The casing liner 50 may be divided into a plurality of parts, like the liner 30 provided on the collision plate 20, and the temperature of each of the divided casing liners 50 may be independently adjusted by the temperature adjustment mechanism 40. Good.

In addition, although some modified examples with respect to the above-described embodiment have been described, naturally, a plurality of modified examples can be applied in combination as appropriate.

DESCRIPTION OF SYMBOLS 10 Crusher 11 Input port 12 Discharge port 13 Brown coal 15 Rotating body 16 Impact member 18 Casing 19 Drive shaft 20 Collision plate 21 Collision plate inner surface 23 Flow path 30 Liner 30A-30C First to third liner member 31 Inner surface 32 of liner Outer surface of liner 33 Flow path 35a Temperature adjustment medium inlet 35b Temperature adjustment medium outlet 36 Heat insulation member 37 Back plate 38 Heater introduction port 39 Storage space 40 Temperature adjustment mechanism 41 Temperature adjustment medium supply unit 42 Temperature adjustment medium 46 Heater 50 Casing liner

Claims

A crusher for crushing an object,
A rotating body,
An impact member attached to the rotating body and colliding with an object;
A collision plate disposed around the rotating body;
A liner provided on an inner surface of the collision plate and having an inner surface on which an object colliding with the impact member is hit;
A temperature adjustment mechanism for adjusting the temperature of the inner surface of the liner,
The said temperature adjustment mechanism is a grinder which is comprised so that the temperature of the said liner can be adjusted inside the inner surface of the said collision board.
The pulverizer according to claim 1, wherein the temperature adjustment mechanism includes a temperature adjustment medium supply unit that supplies a temperature adjustment medium to a flow path that is disposed inside the inner surface of the collision plate.
The pulverizer according to claim 2, wherein a flow path through which the temperature adjusting medium passes is formed inside the liner.
The pulverizer according to claim 3, wherein a heat insulating member is interposed between the flow path formed inside the liner and the inner surface of the collision plate.
The said temperature adjustment medium supply part supplies the said temperature adjustment medium which has a temperature higher than the temperature of the target object thrown into the said grinder into the said flow path. Crusher.
The said temperature adjustment medium supply part supplies the said temperature adjustment medium which has a temperature lower than the temperature of the target object thrown into the said grinder into the said flow path. Crusher.
The pulverizer according to claim 1, wherein the temperature adjusting mechanism includes an electric heater disposed on an inner side than an inner surface of the collision plate.
The pulverizer according to any one of claims 1 to 7, wherein the liner includes a plurality of liner members arranged along a track around which a tip of the impact member circulates.
The pulverizer according to claim 8, wherein the temperature adjusting mechanism is configured to be able to independently adjust the temperatures of the inner surfaces of at least two liner members among the plurality of liner members.
A crusher for crushing an object,
A rotating body,
An impact member attached to the rotating body and colliding with an object;
A collision plate and a casing disposed around the rotating body;
A casing liner provided on an inner surface of the casing, and having an inner surface to which a part of an object colliding with the impact member and the collision plate diffuses and adheres;
A temperature adjusting mechanism for adjusting the temperature of the inner surface of the casing liner,
The pulverizer, wherein the temperature adjusting mechanism is configured to adjust the temperature of the casing liner inside the inner surface of the casing.