Classifier and dust solidification system

Abstract

To provide a technique for appropriately separating foreign matter from dust.SOLUTION: A classifier includes: a hose which sucks dust containing fine dust and foreign matter from a tip of the hose; a main body having a classification space defined on an inner part, connected with a terminal of the hose so as to communicate with the classification space, provided with an upper part discharge port for connecting with a suction device which makes the classification space a negative pressure, on an upper part, and provided with a lower part discharge port for discharging foreign matter which drops through the classification space, on a lower part; a cover member which is mounted on a container forming a storage space for storing the foreign matter discharged from the lower part discharge port of the main body, has an air intake port communicating with the storage space formed and is located on the lower side of the main body and an air introduction pipe which is connected with the air intake port of the cover member and is arranged on the storage space.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present disclosure relates to a classifying apparatus and a dust solidification system. [Background technology]

[0002] Patent Document 1 discloses a device for solidifying waste. This device includes a hopper for storing waste, a compression chamber provided below the hopper, and a compression means for compressing the waste from above and sides of the compression chamber to solidify the waste. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 04-123898 Summary of the Invention [Problem to be solved by the invention]

[0004] In the device described in Patent Document 1, when the waste is dust, foreign matter mixed in with the dust may cause operational abnormalities. The present disclosure provides a technique for appropriately separating foreign matter from dust. [Means for solving the problem]

[0005] A classification device according to one aspect of the present disclosure comprises a main body having a hose that sucks in dust including fine dust and foreign matter from its tip, defining a classification space inside and to which the end of the hose is connected so as to communicate with the classification space, an upper exhaust port at the top for connecting to a suction device that creates negative pressure in the classification space, and a lower exhaust port at the bottom for discharging foreign matter that has fallen through the classification space, a cover member attached to a container that defines a storage space for storing foreign matter discharged from the exhaust port of the main body, having an air intake port that communicates with the storage space, and located below the main body, and an air introduction tube connected to the air intake of the cover member and disposed in the storage space.

[0006] A dust solidification system according to another aspect of the present disclosure is a dust solidification system including a classification device and a solidification device, the classification device including a hose that sucks in dust including fine dust and foreign matter from a tip, a main body that defines a classification space inside and to which the end of the hose is connected so as to communicate with the classification space, an upper exhaust port at an upper part for connecting to a suction device that creates negative pressure in the classification space, and a lower exhaust port at a lower part for discharging foreign matter that has fallen through the classification space, a cover member that is attached to a container that defines a storage space for storing foreign matter discharged from the exhaust port of the main body, has an air intake port that communicates with the storage space formed therein, and is located below the main body, and an air introduction tube that is connected to the air intake port of the cover member and is located in the storage space, and the solidification device receives the fine dust that has passed through the upper exhaust port of the main body and pressurizes the fine dust to form pellets. Effect of the Invention

[0007] According to the present disclosure, foreign matter can be appropriately separated from dust. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is a diagram illustrating an overview of a dust solidification system according to one embodiment. [Diagram 2] FIG. 2 is a side view illustrating an example of a classification device according to an embodiment and an example of a suction device connected to the classification device. [Diagram 3] FIG. 3 is a diagram illustrating an example of the coarse filter of FIG. [Figure 4] FIG. 4 is a perspective view showing an example of the classification device of FIG. [Diagram 5] FIG. 5 is a cross-sectional view showing an example of the classification device of FIG. [Figure 6] FIG. 6 is a partial cross-sectional view showing an example of the classification device of FIG. [Figure 7] FIG. 7 is a perspective view showing an example of an inspection cover and a filter. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] The embodiments of the present disclosure will be described in detail with reference to the drawings. In the description of the drawings, the same elements are given the same reference numerals, and duplicated description will be omitted. The dimensional ratios of the drawings do not necessarily match those in the description. The terms "upper", "lower", "left" and "right" are based on the illustrated state and are for convenience.

[0010] [An example of a dust solidification system] The dust solidification system according to one embodiment is a system for solidifying dust collected in, for example, a factory. Dust is a fine powder that can float in air, and includes fumes generated during laser processing, plasma processing, welding, etc. of metal materials. Solidification refers to compressing and compacting the powder.

[0011] FIG. 1 is a diagram for explaining an outline of a dust solidification system according to one embodiment. A dust collector 20 is arranged in a factory or the like. The dust collector 20 takes in air, removes dust, and releases purified air. The dust collector 20 stores the dust removed from the air in a dust storage container 21. The dust storage container 21 may be a box provided in the dust collector 20 or a pail can. The dust solidification system 100 shown in FIG. 1 solidifies the dust stored in the dust storage container 21 to form pellets. In this embodiment, the object obtained by solidifying the powder is called a pellet.

[0012] As shown in FIG. 1, the dust solidification system 100 includes a classifying device 1 and a solidifying device 2. The classifying device 1 is connected to a suction device 23 and sucks up dust stored in a dust storage container 21. The classifying device 1 classifies the sucked up dust into foreign matter (coarse solid matter) and fine dust. The coarse solid matter is dust having a particle diameter of several tens of μm to several mm, and includes spatter. The fine dust is dust having a particle diameter of 0.1 μm to several μm, and includes fumes. The classifying device 1 may be configured not to suck large foreign matter into the classifying device 1 when sucking up dust. The coarse solid matter classified by the classifying device 1 is stored in a storage container 22 (an example of a container). The storage container 22 is, for example, a pail can. The fine dust classified by the classifying device 1 is stored in an input container 24 via a suction device 23. The input container 24 is, for example, a pail can. The fine dust contained in the input container 24 is input into the solidification device 2. For example, when inputting the fine dust, an attachment that connects to the input port of the solidification device 2 is attached to the input container 24. The solidification device 2 and the input container 24 are connected via the attachment, and the fine dust is input into the solidification device 2. The solidification device 2 is a device that solidifies the dust to form pellets. The solidification device 2 pressurizes the fine dust to form pellets. Since pellets are less likely to scatter than dust, it is possible to reduce exposure of workers to dust, and since pellets have a smaller volume than powder, it is possible to reduce waste disposal costs.

[0013] [Classification device overview] FIG. 2 is a side view showing an example of a classification device according to an embodiment and an example of a suction device connected to the classification device. As shown in FIG. 2, the classification device 1 includes a main body 10 that defines a classification space therein, and a lid member 11 located below the main body 10. The main body 10 is, for example, substantially rectangular, and the lid member 11 is, for example, substantially disk-shaped. A lower portion 10c of the main body 10 is supported by the lid member 11. As a result, the main body 10 is erected on the upper surface of the lid member 11. The lid member 11 is attached to a storage container 22 that contains coarse solids. The storage container 22 is a substantially cylindrical pail can with an open top. As described later, a lower outlet is formed at the lower end of the main body 10 and penetrates the lid member 11. As a result, the classification space defined inside the main body 10 and the inside of the storage container 22 are in communication with each other.

[0014] A suction port 10a is provided on the side of the main body 10 to draw dust into the inside of the main body 10. An end 13b of a first hose 13 (an example of a hose) is connected to the suction port 10a. This allows communication between the inside of the main body 10 and the first hose 13. The first hose 13 may be a flexible pipe made of resin or the like, or a hard pipe made of metal or the like. The first hose 13 sucks in dust from the end 13a. The dust includes fine dust and coarse solids.

[0015] An upper discharge port 10b is provided at the top of the main body 10 for connection to a suction device 23 that creates a negative pressure in the classification space. A second hose 23a of the suction device 23 is connected to the upper discharge port 10b. This allows communication between the inside of the main body 10 and the second hose 23a. The suction device 23 is a device that generates suction force and has, for example, a fan and a motor. The suction device 23 is detachably attached to the input container 24, and collects the sucked fine dust in the input container 24.

[0016] When the suction device 23 starts suction, dust is sucked from the tip 13a of the first hose 13. The dust reaches the classification space defined inside the main body 10 from the suction port 10a. Then, coarse solid matter contained in the dust passes through the lower part 10c of the main body 10 and the cover member 11, and is stored in the storage container 22. Fine dust contained in the dust passes through the upper discharge port 10b and the second hose 23a, and is stored in the input container 24. In this way, the coarse solid matter contained in the dust is stored in the storage container 22, and the fine dust contained in the dust is stored in the input container 24.

[0017] A coarse filter 14 may be provided at the tip 13a of the first hose 13 to remove large foreign objects. Fig. 3 is a diagram showing an example of the coarse filter of Fig. 2. As shown in Fig. 3, the coarse filter 14 has a plurality of openings. Each of the plurality of openings is smaller than the openings of the first hose 13. This allows the coarse filter 14 to prevent large foreign objects from being sucked into the inside of the classifier 1.

[0018] [Details of the classification device] Fig. 4 is a perspective view showing an example of the classification device of Fig. 2. As shown in Fig. 4, the main body 10 of the classification device 1 is attached to the storage container 22 together with the cover member 11. For example, the cover member 11 is detachably attached to the storage container 22 by three locking mechanisms 11a arranged at equal intervals in the circumferential direction. The connection portion between the cover member 11 and the storage container 22 is made airtight. The locking mechanisms 11a are, for example, catch clips.

[0019] The lid member 11 has an opening 11b that communicates with the lower portion 10c of the main body 10. This allows the classification space of the main body 10 to communicate with the inside of the storage container 22. The lid member 11 has an air intake port 11c that communicates with the inside of the storage container 22. The lid member 11 may be provided with a window 11d through which the inside can be viewed. The main body 10 may be configured to be openable by an inspection lid 15. The inspection lid 15 forms a part of the side wall facing the suction port 10a. The inspection lid 15 is detachably attached to the main body 10 by a mounting bracket 15a.

[0020] Fig. 5 is a cross-sectional view showing an example of the classification device of Fig. 2. Fig. 6 is a partial cross-sectional view showing an example of the classification device of Fig. 2, showing a cross section along line VI-VI of Fig. 5. As shown in Figs. 5 and 6, a classification space S1 is defined inside the main body 10. A filter 17 for separating fine dust and coarse solid matter may be provided in the classification space S1. The filter 17 is disposed in front of the upper discharge port 10b. Coarse solid matter that does not fall but rides the air current toward the upper part of the main body 10 is removed by the filter 17.

[0021] The lower part 10c of the main body 10 is constituted by a tubular body 18. As an example, the tubular body 18 is a cylinder having a rectangular cross section. The tubular body 18 may be a straight pipe. The tubular body 18 has a cross-sectional area smaller than the cross-sectional area at the center of the main body 10 (for example, the cross-sectional area passing through the suction port 10a). A lower discharge port 18c is formed at the lower end of the tubular body 18. As a result, the coarse solid matter that has fallen through the classification space S1 is discharged from the lower discharge port 18c and stored in the storage space S2 defined inside the storage container 22.

[0022] An air introduction pipe 19 is connected to the air intake port 11c formed in the lid member 11. The air introduction pipe 19 is, for example, a cylinder. The air introduction pipe 19 is disposed in the storage space S2. The air introduction pipe 19 may be connected to the air intake port 11c of the lid member 11 such that the lower end faces the bottom of the storage container 22.

[0023] The operation of the suction device 23 creates a negative pressure in the classification space S1. This generates an airflow R1 from the tip 13a of the first hose 13 toward the classification space S1 of the main body 10. The airflow R1 collides with the inspection cover 15 and becomes an airflow R2 that rises, and becomes an airflow R3 that is discharged from the upper discharge port 10b. The dust sucked in by the airflow R1 collides with the inspection cover 15. The fine dust contained in the dust is carried by the airflow R2 to the upper discharge port 10b of the main body 10. The coarse solid matter contained in the dust falls to the lower part 10c of the main body 10 by gravity, passes through the tube body 18, and is discharged from the lower discharge port 18c. The fine dust may adhere to the coarse solid matter. For this reason, the fine dust may fall together with the coarse solid matter and reach the storage space S2.

[0024] The storage space S2 is in communication with the classification space S1, and is therefore under negative pressure. As a result, air is taken in from the air intake 11c of the cover member 11. The air passes through the air inlet tube 19 as airflow R4 and is introduced into the storage space S2. The air introduced from the air inlet tube 19 reaches the bottom of the storage container 22 as shown by airflow R5 and hits the stored coarse solids. The fine dust attached to the coarse solids is scattered into the storage space S2 by the airflow R5. Then, an airflow is generated that moves toward the lower discharge port 18c of the main body 10, like the airflow R5. The fine dust scattered into the storage space S2 is carried by the ascending airflow R6 from the lower discharge port 18c of the main body 10 to the classification space S1, and is further carried by the airflow to the upper discharge port 10b of the main body 10.

[0025] In this way, the classifying device 1 can further remove fine dust from the coarse solid matter that has been classified from the dust and stored. Therefore, the classifying device 1 can appropriately separate foreign matter from the dust. Even when the coarse solid matter is disposed of from the storage container 22, scattering of fine dust can be suppressed.

[0026] Furthermore, since the lower portion 10c of the main body 10 is formed of the tube 18, an ascending air current R6 from the storage space S2 to the classification space S1 is appropriately maintained inside the tube 18. If the flow speed of the ascending air current R6 is too fast, it may push back coarse solids that fall from the classification space S1 due to gravity. If the flow speed of the ascending air current R6 is too slow, not only will it be unable to transport fine dust from the storage space S2 to the classification space S1, but there is also a risk that the fine dust will be introduced into the storage space S2.

[0027] The amount of air intake can be changed by adjusting the diameter of the air introduction pipe 19, that is, the cross-sectional area of ​​the air intake port 11c. This allows the flow velocity of the ascending air current R6 to be adjusted. For example, the flow velocity of the ascending air current R6 in the pipe body 18 can be set at a terminal settling velocity that can raise dust particles of about several μm, which is close to the particle diameter of fumes. In this case, it is possible to prevent fine dust particles from being introduced into the storage space S2. For example, the lower limit of the flow velocity of the ascending air current R6 can be set at 0.01 m / s (terminal settling velocity corresponding to dust particles having a particle diameter of about several μm). The flow velocity of the ascending air current R6 may be set at 0.4 m / s to 2.0 m / s (terminal settling velocity corresponding to dust particles having a particle diameter of about 40 μm to 100 μm).

[0028] The flow rate of the ascending air current R6 may be changed by adjusting the cross-sectional area of ​​the pipe 18. For example, the air volume Q (m 3 / min) is the cross-sectional area A (m 2 ) × flow velocity V (m / s) inside tubular body 18 × 60 (s / min). Since air volume Q depends on the diameter of air inlet tube 19, if the cross-sectional area A of tubular body 18 is changed, the flow velocity of tubular body 18 changes inversely proportionally under conditions where air volume Q is constant. For this reason, the above range may be achieved by adjusting the cross-sectional area of ​​tubular body 18.

[0029] The length of the tube body 18 and the air introduction tube 19 can be set appropriately, and may be, for example, about 20% to 80% of the depth of the storage space S2. If the length of the air introduction tube 19 is too short (for example, less than 20% of the depth of the storage space S2), the distance from the lower end of the air introduction tube 19 to the bottom of the storage space S2 becomes long, so that the air descending from the air introduction tube 19 is diffused or attenuated before reaching the bottom of the storage space S2, and the effect of lifting up the fine dust introduced to the bottom of the storage space S2 may be weakened. If the length of the air introduction tube 19 is too long (80% or more of the depth of the storage space S2), there is a risk that the lower end of the air introduction tube 19 will be quickly filled with coarse solids. If the air introduction pipe 19 becomes buried in coarse solid matter, the amount of air taken in will decrease and the rising air current R6 generated in the pipe body 18 will weaken, making it easier for fine dust to fall and potentially introducing fine dust into the storage space S2.

[0030] If the length of the tube body 18 is too short (for example, less than 20 mm), the rising air current R6 generated in the tube body 18 may be weakened, making it easier for fine dust to fall and easier for the fine dust to be introduced into the storage space S2. If the length of the tube body 18 is too long (80% or more of the depth of the storage space S2), there is a risk that the coarse solids will quickly fill up the lower end of the tube body 18. If the lower end of the tube body 18 is buried, there is nowhere for the fumes that have been introduced into the storage space S2 to go, so there is a risk that the effect of lifting up the fine dust will be lost. Also, if the lower end of the tube body 18 is in the process of being buried, the flow rate will increase due to the narrowing of the air inlet, and so there is a risk that the coarse solids will also be lifted up.

[0031] For the above reasons, the length of the pipe body 18 and the air introduction pipe 19 is set to about 20% to 80% of the depth of the storage space S2.

[0032] The inspection lid 15 may support a filter 17. FIG. 7 is a perspective view showing an example of the inspection lid and the filter. The filter 17 has a frame body 17a and a wire mesh 17b supported by the frame body 17a. The mesh size of the wire mesh 17b is larger than that of fine dust particles and smaller than that of coarse solids. An end of the filter 17 is fixedly supported by the inspection lid 15. This allows the filter 17 to be easily removed from the classification space S1 by removing the inspection lid 15 from the main body 10.

[0033] [Summary of the embodiment] According to the classifying device 1, fine dust attached to the coarse solid matter stored in the storage container 22 can be scattered into the storage space S2 using air introduced from the air introduction tube 19. The fine dust scattered into the storage space S2 is carried by the ascending air current R6 from the lower discharge port 18c of the main body 10 to the classification space S1, and is further carried by the air current R2 to the upper discharge port 10b of the main body 10. In this way, the classifying device 1 can further remove fine dust from the coarse solid matter classified from the dust and stored. Therefore, the classifying device 1 can properly separate foreign matter from the dust.

[0034] Although various exemplary embodiments have been described above, various omissions, substitutions, and modifications may be made without being limited to the above-described exemplary embodiments.

[0035] The tube 18 may be configured integrally with the main body 10, or may be configured separately from the main body 10 and connected thereto. The lower end of the air introduction tube 19 does not have to face the bottom of the storage container 22. The storage container 22 and the input container 24 may be distributed as consumables. The suction device 23 is not limited to the suction device 23 of the embodiment, and any device having a suction function can be applied.

[0036] [Overview of the embodiment of the present disclosure] The present disclosure includes the following aspects.

[0037] (Clause 1) A classification device according to one aspect of the present disclosure comprises a main body having a hose that sucks in dust including fine dust and foreign matter from its tip, defining a classification space inside and having an end of the hose connected to communicate with the classification space, an upper exhaust port at the top for connecting to a suction device that creates negative pressure in the classification space, and a lower exhaust port at the bottom for discharging foreign matter that has fallen through the classification space, a cover member attached to a container that defines a storage space for storing foreign matter discharged from the lower exhaust port of the main body, having an air intake port that communicates with the storage space, and located below the main body, and an air introduction tube connected to the air intake of the cover member and disposed in the storage space.

[0038] In this classification device, a suction device is connected to the upper exhaust port of the main body. The suction device sucks in the air in the classification space, creating a negative pressure in the classification space. This generates an airflow from the tip of the hose toward the classification space of the main body. The airflow sucks in dust containing fine dust and foreign matter from the tip of the hose and introduces it into the classification space of the main body. Then, in the classification space, an airflow is generated toward the upper exhaust port of the main body. In the classification space, the fine dust contained in the dust is carried by the airflow to the upper exhaust port of the main body, and the foreign matter contained in the dust falls to the bottom of the main body due to gravity. The foreign matter falls from the lower exhaust port of the main body into the storage space of the container and is stored there.

[0039] The storage space is in communication with the classification space via the lower discharge port, and is under negative pressure. This causes air to be taken in through the air intake port of the lid member. The air passes through the air introduction tube and is introduced into the storage space. The air introduced through the air introduction tube hits the foreign objects stored in the container, scattering fine dust particles attached to the foreign objects into the storage space. In the storage space, an airflow is generated that flows toward the lower discharge port of the main body. The fine dust particles scattered into the storage space are carried by the airflow from the lower discharge port of the main body to the classification space, and are further carried by the airflow to the upper discharge port of the main body.

[0040] In this manner, the classifying device can further remove fine dust from the foreign matter that has been classified and stored from the dust, and therefore the classifying device can appropriately separate the foreign matter from the dust.

[0041] (Clause 2) In the classification device described in clause 1, the air introduction pipe may be connected to the air intake of the lid member so that the lower end faces the bottom of the container. In this case, air is introduced toward the bottom of the container. Since the introduced air reverses and rises at the bottom of the container, this air introduction pipe can efficiently scatter fine dust attached to the foreign matter into the storage space.

[0042] (Clause 3) In the classification device described in clause 1 or 2, the lower part of the main body may be formed of a tube having a cross-sectional area smaller than the cross-sectional area of ​​the center of the main body, and the lower end of the tube may constitute the lower discharge port. This allows an upward air current from the storage space to the classification space to be appropriately maintained inside the tube. Therefore, even if fine dust separates from the foreign object while the foreign object is falling, and even if the fine dust moves downward due to the inertial force generated when the dust is introduced into the classification space, the upward air current transports the fine dust upward, so that the fine dust is prevented from falling into the storage space.

[0043] (Clause 4) The classification device according to any one of clauses 1 to 3 may include a coarse filter provided at the tip of a hose and having a plurality of openings. Each of the plurality of openings is smaller than the opening of the hose. The classification device can avoid suctioning foreign matter larger than the size of each of the plurality of openings.

[0044] (Clause 5) The classification device according to any one of clauses 1 to 4 may include a removable inspection lid constituting a part of the side wall of the main body, and a filter that is disposed in front of an upper exhaust port provided on the upper part of the main body and supported by the inspection lid, and separates fine dust and foreign matter. Foreign matter that does not fall but rides on the air current toward the upper part of the main body is removed by the filter. The filter can be easily removed from the classification space by removing the inspection lid from the main body. This reduces the burden of cleaning the filter.

[0045] (Clause 6) A dust solidification system according to another aspect of the present disclosure is a dust solidification system including a classification device and a solidification device, the classification device including a hose that sucks in dust including fine dust and foreign matter from a tip, a main body that defines a classification space inside and to which the end of the hose is connected so as to communicate with the classification space, an upper exhaust port at an upper part for connecting to a suction device that creates negative pressure in the classification space, and a lower exhaust port at a lower part for discharging foreign matter that has fallen through the classification space, a cover member that is connected to a container that defines a storage space for storing the foreign matter discharged from the lower exhaust port of the main body and has an air intake port that communicates with the storage space formed therein, and is located below the main body, and an air introduction tube that is connected to the air intake port of the cover member and is located in the storage space, and the solidification device receives the fine dust that has passed through the upper exhaust port of the main body and pressurizes the fine dust to form pellets.

[0046] This dust solidification system has the same effect as the above-mentioned classification device. Furthermore, in this dust solidification system, foreign matter is removed from the dust, and fine dust is fed into the solidification device. This reduces malfunctions of the solidification device. In addition, the moldability of the pellets is improved. [Explanation of symbols]

[0047] 1...classification device, 2...solidification device, 10...main body, 11...lid member, 11c...air intake port, 13...first hose (an example of a hose), 14...coarse filter, 15...inspection cover, 18...tube body, 19...air introduction pipe, 22...storage container (an example of a container), 23...suction device, 100...dust solidification system.

Claims

1. A hose that sucks in fine dust and dust containing foreign matter from a tip thereof; a main body defining a classification space therein, an end of the hose being connected to communicate with the classification space, an upper exhaust port being provided at an upper portion thereof for connection to a suction device that creates a negative pressure in the classification space, and a lower exhaust port being provided at a lower portion thereof for discharging the foreign matter that has fallen through the classification space; a cover member that is attached to a container that defines a storage space for storing the foreign matter discharged from the lower discharge port of the main body, the cover member having an air intake port that communicates with the storage space and is located below the main body; an air introduction pipe connected to the air intake port of the lid member and disposed in the storage space; A classification device comprising:

2. The classification device according to claim 1 , wherein the air introduction pipe is connected to the air intake port of the lid member such that a lower end of the air introduction pipe faces a bottom portion of the container.

3. 3. The classification device according to claim 1, wherein a lower portion of the main body is formed of a tube having a cross-sectional area smaller than a cross-sectional area of ​​a center of the main body, and a lower end of the tube forms the lower discharge port.

4. 3. The classification device according to claim 1, further comprising a coarse filter provided at a tip of the hose and having a plurality of openings, each of the plurality of openings being smaller than an opening of the hose.

5. A removable inspection cover that constitutes a part of a side wall of the main body; a filter disposed in front of the upper exhaust port provided on the upper part of the main body and supported by the inspection lid, for separating the fine dust particles from the foreign matter; The classification device according to claim 1 or 2, comprising:

6. A dust solidification system including a classification device and a solidification device, The classification device is A hose that sucks in fine dust and dust containing foreign matter from a tip thereof; a main body defining a classification space therein, an end of the hose being connected to communicate with the classification space, an upper exhaust port being provided at an upper portion thereof for connection to a suction device that creates a negative pressure in the classification space, and a lower exhaust port being provided at a lower portion thereof for discharging the foreign matter that has fallen through the classification space; a cover member that is attached to a container that defines a storage space for storing the foreign matter discharged from the lower discharge port of the main body, the cover member having an air intake port that communicates with the storage space and is located below the main body; an air introduction pipe connected to the air intake port of the lid member and disposed in the storage space; Equipped with The solidification device receives the fine dust that has passed through the upper discharge port of the main body, and pressurizes the fine dust to form pellets. This is a dust solidification system.

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