JP5052020B2 - Waste gypsum board recycling equipment - Google Patents

Description

  BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention generally relates to a recycling apparatus for waste gypsum board that is discharged as a part of construction waste, and in particular, waste gypsum board that is crushed and efficiently separates gypsum and paper in a broken state. Related to recycling equipment.

  Conventionally, most of the waste gypsum board is a mineral of calcium sulfate, so it has been treated as a stable waste and landfilled. However, gypsum board is constructed so that it is hard to break by sandwiching plaster plaster with paper from both sides, so after it is discarded and landfilled, the paper and adhesive will corrode by sucking rainwater etc. Invite the situation to occur. Gypsum is a natural mineral that can be reused, and paper can be recycled into recycled paper after separation.

  In recent years, therefore, several waste gypsum board recycling apparatuses have been developed and proposed. For example, a gypsum board crushing and sorting machine disclosed in the following patent document has a gypsum board inlet at one end, and a horizontal cylinder formed with a large number of through holes from the inner middle part to the other end part, It is supported so that it can rotate inside, and it is driven to rotate and crushes and conveys the input gypsum board to the other end on the inside, and horizontally so as to cover many through holes at the other end on the inside of the horizontal cylinder. A porous casing that is rotatably supported by a machine base and / or a horizontal cylinder, is driven to rotate by a rotary drive device, drops gypsum powder from the pores, and sends a sheet piece to an opening at one end by a spiral on the inner surface; It is composed of

JP-A-10-5615

  The gypsum board crushing and sorting machine disclosed in the patent document has the advantage that the installation area is small with a compact structure, but the gypsum powder is only separated by natural fall, The separation work efficiency is low, and the gypsum powder is discharged along with the paper, and the gypsum powder / paper is not sufficiently separated.

  The present invention has been proposed in view of the above-described conventional circumstances. The purpose of the present invention is to separate gypsum powder / paper pieces into gypsum powder and paper pieces with a high separation performance. It is an object of the present invention to provide a recycling apparatus for waste gypsum board that can be recycled, can be crushed and pulverized more reliably, and can be configured to disperse the load of pulverization and pulverization.

  In order to achieve the above-mentioned object, the waste gypsum board recycling apparatus according to the present invention comprises a crushing means for crushing waste gypsum board with paper input from an input port, crushed waste gypsum board fragments and gypsum powder A paper / powder separation means, and a paper / powder separation means for separating the conveyed fragments and gypsum powder into paper pieces and gypsum powder, A cylindrical casing having a receiving port for debris and gypsum powder at one end and a paper discharge port at the other end, and having a discharging portion for gypsum powder at the lower portion, and housed in the cylindrical casing, A cylindrical screen having a slot for receiving debris and gypsum powder and a paper discharge port at the other end, and preferably having a large number of elongated slits with a width of 1 mm to 7 mm formed on the peripheral wall, and rotating into the cylindrical screen. A separation rotating body having a spiral blade that is supported and capable of generating a paper piece conveying wind, and a driving means for rotating the separation rotating body, and is configured to remove fragments and gypsum powder by centrifugal force generated by the rotation of the spiral blade. It is characterized in that the pieces are further crushed by applying to a cylindrical screen, the gypsum powder is separated from the screen through a slit, and the paper pieces are conveyed to the discharge port by the conveying air and separated.

  The crushing means has a horizontally long cylindrical casing having a waste gypsum board inlet at the top and an outlet at one end thereof, and is rotationally driven in a direction of biting from the top to the bottom between a pair thereof. The waste gypsum board that has been thrown into is preferably crushed into pieces of about 2 cm square to about 12 cm square and the helix that carries the debris and gypsum powder to the outlet, and the helix is preferably driven at 5 to 30 RPM. The cylindrical casing has a first part in which a plurality of strips extending in the longitudinal direction are spaced apart as a fixed blade in the circumferential direction, and a comb projecting inwardly on the inner surface on the downstream side Consists of a second part with teeth separated in the longitudinal direction as a plurality of fixed blades, and a third part that is provided further downstream and collects fragments and gypsum powder generated by crushing the first part and the second part And the spiral is Corresponding to the first part of the cylindrical casing, there is a first part projecting a plurality of blades around so as not to interfere with the strip fixed blade, and a second part of the cylindrical casing there A second part having spiral blades so as not to interfere with the comb-tooth fixed blade and a third part having only a shaft corresponding to the third part of the cylindrical casing and having neither fixed blades nor spiral blades.

  The third part of the cylindrical casing may have a baffle plate urged to close by a weight at a communication opening with the second part of the cylindrical casing.

  The blades of the first part of the spiral body are attached to the spiral blades at a pitch slightly larger than 90 degrees, preferably at a pitch in the range of 92.5 degrees to 95 degrees so as not to align with the same phase.

  The conveying means is composed of the spiral body of the crushing means, or a receiving port is connected to the spiral body of the crushing means and a discharge port at one end of the horizontally long cylindrical casing, and the paper / powder separation is performed. A screw conveyor that conveys debris and gypsum powder to a cylindrical casing and a receiving port of a cylindrical screen of the means, and a rotational driving means of the screw conveyor.

  The rotating body of the paper / powder separation means has a plurality of spiral blades rotating at a peripheral speed of about 10 m / second to about 30 m / second, and these spiral blades are alternately arranged on the receiving port side and the paper discharge port side. They are shifted.

The discharge part of the gypsum powder of the paper / powder separation means is constituted by a screw conveyor.
Further, the charging port has a lid that can be opened and closed, and detects the opening and closing of the lid with a switch. When the lid is opened, the operation of at least the crushing means is stopped, and when the lid is closed, It is configured to allow driving.
Further, the pair of crushing members of the crushing means are arranged apart from each other so as not to interfere with each other, and are rotationally driven by individual reversible driving means so that they can be reversed by a predetermined number of rotations when receiving a predetermined rotational resistance. Composed.

Therefore, according to the recycling apparatus for waste gypsum board according to the present invention, the debris and gypsum powder that has been crushed by the crushing means and the waste gypsum board with paper that has been input from the inlet is conveyed to the paper / powder separation means by the conveyance means. There, it is continuously separated into a piece of paper and gypsum powder. At that time, the debris and gypsum powder are transported from the receiving port into the cylindrical screen, and centrifugal force is applied by the spiral blades of the separating rotating body that is driven to rotate inside, thereby forming elongated slits having a width of 1 mm to 7 mm. It collides with the inside of a large number of surrounding walls and is further pulverized. At the same time as the pulverization, the gypsum powder is discharged into the cylindrical casing through the slit, and is collected after being collected in the discharge part of the lower gypsum powder. On the other hand, the paper pieces simultaneously separated by crushing due to the collision to the inside of the surrounding wall are conveyed and discharged by the conveying air toward the paper piece discharge port caused by the rotation of the spiral blade in the cylindrical screen. Thus, the crushing and separation are surely performed by collision with the screen, the gypsum powder / paper piece separation operation is fast, and the waste gypsum board can be separated into the gypsum powder and the paper piece with high separation performance. The elongated slits with a width of 1 mm to 7 mm are constantly impacted by debris and gypsum powder flying from the inside by centrifugal force, and are not clogged, contributing to an improvement in the speed of separation work. Insufficient separation fragments are heavily subjected to centrifugal force and are made to collide with the screen before being conveyed by the conveying air, which promotes separation of gypsum powder and paper pieces, prevents mixed discharge, and improves separation accuracy. Be improved.

  Waste gypsum board thrown in from the top of the crushing means is bitten from top to bottom by a pair of spiral bodies that are driven to rotate at 5 to 30 RPM by the drive means inside the horizontally long cylindrical casing. It is rarely broken into pieces of about 2 cm square to about 12 cm square, which are suitable for applying to the screen of the paper / powder separating means, and the pieces and gypsum powder generated by the crushing are continuously conveyed to the discharge port by the spiral. Is done.

  When the conveying means is composed of the spiral body of the crushing means, the waste gypsum board recycling apparatus can be made compact by connecting to the crushing means immediately with the paper / powder separation means. In addition, the conveying means is connected to the spiral body of the crushing means and the discharge port at one end of the horizontally long cylindrical casing, and to the cylindrical casing of the paper / powder separation means and the receiving port of the cylindrical screen, fragments and gypsum By comprising a screw conveyor for conveying the powder and a rotational drive means for the screw conveyor, the waste gypsum is continuously produced even if the crushing means and the paper / powder separating means are separated from each other in the horizontal direction and / or the vertical direction. The board recycling device can be operated.

  In the cylindrical casing, in the first part where a plurality of strips extending in the longitudinal direction are provided as fixed blades in the circumferential direction on the inner surface, a plurality of blades project around the periphery so as not to interfere with the strip fixed blades. The waste gypsum board can be effectively crushed and the paper and gypsum powder can be separated by the first part of the provided spiral body. Further, the waste gypsum board fragments are crushed by the comb teeth and the spiral blades in the second part of the cylindrical casing in which the comb teeth projecting inward on the inner surface on the downstream side are spaced apart as a plurality of fixed blades in the longitudinal direction. Separation into powder can be facilitated. Further, a piece of paper and gypsum powder, which are provided on the downstream side and are crushed by the first and second parts, are transferred to the third part of the cylindrical casing with no fixed blades and no spiral blades. Can be collected for transport.

  In the third part of the cylindrical casing, the baffle plate that is urged to close by the weight to the communication opening with the second part of the cylindrical casing is obstructed from easily flowing in the fragments from the second part, While being repeatedly pulverized in the first part and the second part, the gypsum board fragments are rubbed against each other by the spiral body so that they are almost completely separated into paper pieces and gypsum powder.

  The blades of the first part of the spiral body are attached to the spiral blades at a pitch slightly larger than 90 degrees, preferably in the range of 92.5 degrees to 95 degrees so that they do not align with the same phase, so that the blades simultaneously dispose of the waste gypsum board. By sequentially biting without biting, the crushing load during rotation can be distributed and uniformed, and crushing can be repeated for a long time with relatively small power. If the mounting pitch of the blade is in the range of 92.5 degrees to 95 degrees, there will be no deviation from 10 degrees to 20 degrees in one round and the same phase will not be aligned, and the biting interval will not be too long. The blades can bite the waste gypsum board at appropriate intervals.

  The rotating body of the paper / powder separation means can apply a relatively large centrifugal force to the waste gypsum board fragments by a plurality of spiral blades rotating at a peripheral speed of about 10 m / sec to about 30 m / sec, The impact can promote the crushing of the gypsum and the separation of the paper pieces, and the screen can be prevented from clogging with a small vibration caused by the impact. When the spiral blades are alternately shifted to the receiving port side and the paper discharge port side, the fragments and gypsum powder entering from the receiving port by the spiral blades approaching the receiving port side are also transferred to the back of the cylindrical screen. Taking in and preventing a large amount of stagnation on the receiving port side, efficient crushing and separation can be performed. Moreover, weight reduction is achieved by the plurality of openings of each spiral blade, and the gypsum powder can be separated from the paper piece in advance by breaking the fragments. Protrusions can also be broken up to separate the gypsum powder from the paper pieces in advance.

The discharge part of the gypsum powder of the paper / powder separation means is constituted by a screw conveyor, so that the separation gypsum powder can be prevented from rising due to the paper conveying wind and can be forcibly discharged collectively.
Further, the charging port has a lid that can be opened and closed, and detects the opening and closing of the lid with a switch. When the lid is opened, the operation of at least the crushing means is stopped, and when the lid is closed, If it is configured to be operable, it is possible to prevent crushing dust from rising to the workplace during crushing work, and to maintain a favorable work environment.
Further, the pair of crushing members of the crushing means are arranged apart from each other so as not to interfere with each other, and are rotationally driven by individual reversible driving means so that they can be reversed by a predetermined number of rotations when receiving a predetermined rotational resistance. By configuring the gypsum board pieces, they are rubbed against each other by a spiral and almost completely separated into paper pieces and gypsum powder, and when the driving means such as an electric motor is subjected to excessive rotational resistance, the driving means is reversed. To release excessive rotational resistance and repeatedly perform crushing and rubbing

Next, a waste gypsum board recycling apparatus according to a representative embodiment of the present invention will be described in detail with reference to the accompanying drawings.
(A) of FIG. 1 is a schematic longitudinal cross-sectional view explaining the whole recycling apparatus of the waste gypsum board of the typical Example which concerns on this invention, (b) is a side view of a crushing part, (a) of FIG. ) Is a front view of the helix of the crushing part, (b) is a cross-sectional view of the helix, (c) is a perspective view of the helix, and (a) of FIG. 3 is a vertical cross-sectional view of the third part of the crushing part. (B) is a side view thereof, FIG. 4 is a partially enlarged view of a cylindrical screen of the paper / powder separation means of the recycling apparatus, and FIG. 5 is a perspective view of a rotating body of the paper / powder separation means of the recycling apparatus. It is.

  1 to 5, a recycling apparatus 1 for waste gypsum board according to a representative embodiment includes a crushing unit 10 that crushes waste gypsum board W with paper fed from an inlet 12, and a crushing waste gypsum board W. It comprises a transport unit 20 that transports the fragments and gypsum powder to the paper / powder separation unit 30, and a paper / powder separation unit 30 that separates the transported fragments and gypsum powder into paper pieces W1 and gypsum powder W2. .

  The crushing unit 10 has a horizontally long cylindrical casing 11 having a hopper-shaped waste gypsum board inlet 12 at the top and a discharge port 13 at one end, and a pair of bites into the inside thereof from above to below. Spirals 14A and 14B that are rotationally driven in the direction and spaced apart so as not to interfere with each other, crush the waste gypsum board W inserted between them into pieces of about 5 cm square and convey the pieces and gypsum powder to the discharge port 13. And reversible geared motors M1 and M1 ′ with reduction gears that individually rotate and drive the helical body at about 20 RPM. In the process of crushing the gypsum board and rubbing the pieces together and separating them almost completely into paper pieces and gypsum powder, the motors M1 and M1 'are overcurrent detectors and overtorque detectors when excessive rotational resistance is applied. Therefore, for example, the rotation resistance is reversed by about 5 rotations to release excessive rotation resistance. The spiral direction of the spiral bodies 14A and 14B is selected so as to transport the debris to the discharge port 13 so as to also serve as a transport means. The inlet 12 has a lid 12a that is opened and closed by a cylinder CY to prevent dust from rising during the crushing operation. The opening and closing of the lid 12a is detected by a switch SW, and when the lid is opened, the crushing unit 10 Or the entire recycling apparatus 1 is stopped, and the entire recycling apparatus 1 can be operated as well as the crushing unit 10 when the lid is closed.

  The cylindrical casing 11 includes a first part A having a plurality of strips 11a extending in the longitudinal direction on the inner surface thereof as a fixed blade in the circumferential direction, and comb teeth 11b projecting inwardly on the inner surface on the downstream side in the longitudinal direction. A second part B spaced apart as a plurality of fixed blades, and a third part C that is provided further downstream and collects fragments and gypsum powders crushed by the first part A and the second part B Has been. On the other hand, the spiral bodies 14A and 14B correspond to the first part A of the cylindrical casing, and a plurality of flat blades and blades 15 of a sword blade are provided so as not to interfere with the strip fixing blade 11a there. A part A ′, a second part B ′ having a spiral blade 16 so as not to interfere with the comb fixed blade 11b corresponding to the second part B of the cylindrical casing, and a third part C of the cylindrical casing And a third portion C ′ having only a shaft 17 having neither a fixed blade nor a spiral blade. The third part C of the cylindrical casing is urged so as to be closed by the weight 19a to the communication opening part 11c with the second part B, and the first part prevents the fragments from easily flowing from the second part B. It has a rockable baffle 19b inside that is repeatedly crushed at A and second part B and allows the pieces to rub against each other to effectively separate the paper and gypsum powder. The blades 15 of the first part A 'of the spiral body are attached to the spiral blades 16 at a pitch slightly larger than 90 degrees, preferably at a pitch in the range of 92.5 degrees to 95 degrees so as not to align with the same phase. As shown in FIG. 2 (c), by setting the pitch of the blades 15 to 93.5 degrees, the blades 15 having the corresponding phases of the left and right spiral bodies 14A and 14B smoothly approach each other, and the gypsum boards are sequentially moved to each other. I get bitten in between.

The conveyance unit 20 also includes the spiral bodies 14A and 14B of the crushing unit 10, and in addition to connecting the receiving port 22 to the discharge port 13 of the horizontally long cylindrical casing of the crushing unit 10, the paper / powder separation unit 30 is integrated. A screw conveyor 21 for transporting debris and gypsum powder to the cylindrical casing 31 and the receiving port 32 for the cylindrical screen 35, and a rotational drive motor M2 of the screw conveyor are included. In this embodiment, the gypsum powder W2 is separated from the receiving port 22 which is low because the crushing portion 10 is set low so that the waste gypsum board W can be easily fed by the conveyor 5, and the truck The screw conveyor 21 is installed obliquely over the receiving port 32 of the paper / powder separation unit 30 which is high because it is set high so as to facilitate loading.

  The paper / powder separation unit 30 includes an external horizontally long cylindrical casing 31, an internal cylindrical screen 35 accommodated in a fixed state with a space therebetween, and a separation rotator 40 that is rotationally driven therein. The rotary drive motor M3, the gypsum powder discharging screw conveyor 38 at the bottom of the external horizontally long cylindrical casing 31, and the rotary drive motor M4 are provided. The external horizontally long cylindrical casing 31 and the cylindrical screen 35 are configured so that the upper half can be opened and closed so that the inside can be inspected, and has a receiving port 32 for fragments and gypsum powder to be conveyed at one end. A paper piece discharge port 33 is provided at the other end portion, and a screw conveyor 38 as a discharge portion for gypsum powder is provided at the lower portion. A cylindrical screen 35 fixed and accommodated at both ends within the outer cylindrical casing 31 has the above-mentioned integrally integrated piece and gypsum powder receiving port 32 at one end and the other. A plurality of elongated slits 37 having a width of 1.4 mm and a length of 10 cm are formed in the peripheral wall 36 in the longitudinal direction and the circumferential direction. The slit 37 forms a peripheral wall of the screen and is formed between a plurality of adjacent horizontally long ridges 36 having a wedge-shaped cross section with the front end facing the outside of the screen. The discharge to the outside can be promoted, and it has a clogging prevention structure. Dried gypsum powder does not clog, but even if it is clogged up in a slit 37 when the humidity is high and damp, some parts collapse by the powder that hits one after another because of the landscape, Immediately after that, the whole clogging will collapse. The eaves 36 are reinforced and partitioned by a reinforcing ring 35A at intervals of 10 cm in the longitudinal direction. The space between the casing 31 and the screen 35 forms a space for collecting gypsum powder separated from the slit 37 and coming out. The slit 37 is formed to be long in the oblique direction and the peripheral direction in addition to the horizontally long shape.

  The separation rotator 40 is rotatably supported in the cylindrical screen 35, and generates four pieces of spiral blades 42 and 44 that generate a paper piece conveying wind from the receiving port 32 to the paper discharge port 33, and the outer peripheral edges thereof. And an attached rubber plate 45. Of the four spiral blades, two spiral blades 42 with a 180-degree pitch are close to the receiving port side, and the other two spiral blades 44 with a 180-degree pitch are close to the paper discharge port side. . The rotational speed variable speed motor M3 rotationally drives the spiral blades 42 and 44 at a peripheral speed of about 10 m / second to about 30 m / second, preferably at a peripheral speed of 15 m / second, and separates the pieces of paper separated in the screen 35. While the conveyance wind to convey is generated, it rotates in the direction which conveys the fragment and the gypsum powder which the spiral blade 42 which approached the receiving port side received to the back paper piece discharge port side. Debris and gypsum powder are applied to the inside of the cylindrical screen 35 by the centrifugal force applied by the spiral blades 42 and 44 and further crushed. The gypsum powder is separated from the screen through the slit 37, and the remaining paper pieces are conveyed. It is conveyed to the paper discharge port 33 by the wind and separated. The separated gypsum powder W2 can be dropped and discharged from the lower portion of the external horizontally long cylindrical casing 31 as it is. However, the screw conveyor 38 collectively forcibly discharges it to prevent it from rising due to the influence of the conveying wind. . On the receiving port side of the spiral blade 44 close to the paper discharge port side, there are provided a scattering rod 47 for stirring and scattering the received paper piece and gypsum powder, and a small triangular blade 46 for taking them in.

  A plurality of openings 43 are formed in each of the spiral blades 42 and 44, and the weight can be reduced by the openings 43, and the gypsum powder can be separated from the paper pieces in advance by breaking the fragments. Furthermore, a protrusion is also formed on the spiral blade, and the powder can be separated from the paper piece in advance by breaking the piece. The rubber plate 45 attached to the tip of the spiral blade is for protecting the screen from being damaged if it contacts the inner surface of the screen 35.

  In addition to the waste gypsum board recycling apparatus 1 of the above-described representative embodiment, the screw conveyor 21 of the conveying means is omitted, and the discharge port 13 of the crushing unit 10 and the receiving port 32 of the paper / powder separation unit 30 are substantially the same height. Thus, a configuration in which they are directly connected can also be adopted.

(A) is a schematic longitudinal cross-sectional view explaining the whole recycling apparatus of the waste gypsum board of the typical Example which concerns on this invention, (b) is a side view of a crushing part. (A) is a front view of the spiral body of the crushing part of the same Example, (b) is a cross-sectional view of a spiral body, (c) is a perspective view of a spiral body. (A) is the longitudinal cross-sectional view of the 3rd part of the crushing part of the Example, (b) is the side view. It is the elements on larger scale of the cylindrical screen of the paper / powder separation means of this recycling apparatus. It is a perspective view of the rotary body of the paper / powder separation means of this recycling apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Waste gypsum board recycling apparatus 10 Crushing means 11 Cylindrical casing 11a Strip material fixed blade 11b Comb fixed blade 12 Input port 12a Lid
13 discharge port 14A, B spiral body 15 blade 16 spiral blade 17 shaft 19a weight 19b baffle plate 20 conveying means 21 screw conveyor 22 receiving port 30 paper / powder separation means 31 cylindrical casing 32 receiving port 33 paper piece discharge port 35 cylindrical screen 36 Peripheral wall 37 Slit 38 Gypsum powder discharging part 40 Separation rotating body 42 Spiral blade (receiving port side spiral blade)
43 Opening 44 Spiral blade (paper discharge side spiral blade)
A 1st part of cylindrical casing B 2nd part of cylindrical casing C 3rd part of cylindrical casing A '1st part of spiral body B' 2nd part of spiral body C '3rd part of spiral body M1 Driving means of crushing means M2 Rotation drive means of screw conveyor SW switch W Waste gypsum board with paper W1 Paper piece W2 Gypsum powder

Claims (9)

Crushing means for crushing waste gypsum board with paper fed from the inlet,
Conveying means for conveying crushed waste gypsum board fragments and gypsum powder to paper / powder separating means;
Paper / powder separating means for separating the conveyed debris and gypsum powder into paper pieces and gypsum powder;
The paper / powder separating means has a cylindrical casing having a piece and gypsum powder receiving port at one end, a paper piece discharge port at the other end, and a gypsum powder discharging portion at the bottom, and the cylindrical shape A cylindrical screen that is housed in a casing, has a receiving port for fragments and gypsum powder at one end and a paper piece discharge port at the other end, and has a number of slits formed in the surrounding wall, and rotates into the cylindrical screen. A separation rotating body having a spiral blade that is supported and capable of generating a paper piece conveying wind, and a driving means for rotating the separation rotating body, and is configured to remove fragments and gypsum powder by centrifugal force generated by the rotation of the spiral blade. further crushing debris against the cylindrical screen to separate out of the screen through the gypsum powder in the slit, the recycling apparatus der waste plasterboard rather rows separated and conveyed to the discharge port of the paper by the transport air Te,
The crushing means has a horizontally long cylindrical casing 11 having an input port for waste gypsum board at the top and a discharge port at one end, and is driven to rotate in the direction of biting from top to bottom between a pair. The hinders 14A and 14B for crushing the charged waste gypsum board into fragments and conveying the fragments and gypsum powder to the discharge port, and driving means for rotationally driving the helix.
The cylindrical casing has a first portion A in which a plurality of strips extending in the longitudinal direction on the inner surface thereof are spaced apart as fixed blades 11a in the circumferential direction, and comb teeth 11b protruding inwardly on the inner surface on the downstream side in the longitudinal direction. A second part B spaced apart as a plurality of fixed blades, and a third part C that is provided further downstream and collects debris and gypsum powder generated by crushing the first part and the second part. And
The helical body corresponds to the first part A of the cylindrical casing, a first portion A ′ projecting a plurality of blades so as not to interfere with the strip fixing blade 11a there, and a first part A ′ of the cylindrical casing. The second part B ′ having the spiral blade 16 so as not to interfere with the comb-tooth fixed blade 11b corresponding to the second part B, and the fixed blade also corresponding to the third part C of the cylindrical casing And the third part C ′ with only the shaft without
The waste gypsum board recycling apparatus, wherein the blades 15 of the first portion A ′ of the spiral body are attached to the spiral blades 16 at a pitch slightly larger than 90 degrees so as not to be in the same phase .   The recycling apparatus according to claim 2, wherein the third part of the cylindrical casing has a baffle plate urged so as to be closed by a weight at a communication opening with the second part of the cylindrical casing.   The recycling apparatus according to claim 1, wherein the conveying unit is configured by the spiral body of the crushing unit.   The conveying means connects the helical body of the crushing means and a discharge port at one end of the horizontally long cylindrical casing, and receives the cylindrical casing and the cylindrical screen of the paper / powder separating means. The recycling apparatus according to claim 1, further comprising: a screw conveyor that conveys debris and gypsum powder; and a rotation driving means of the screw conveyor.   The rotating body of the paper / powder separation means has a plurality of spiral blades 42 and 44 that rotate at a peripheral speed of about 10 m / second to about 30 m / second, and these spiral blades 42 and 44 receive alternately. The recycling apparatus according to claim 1, wherein the recycling apparatus is shifted from the mouth side and the paper discharge port side.   The recycling apparatus according to claim 5, wherein each of the spiral blades has a plurality of openings 43 and / or protrusions.   The recycling apparatus according to claim 1, wherein the gypsum powder discharge section of the paper / powder separation means is constituted by a screw conveyor.   The insertion port has a lid that can be opened and closed, and the opening and closing of the lid is detected by a switch. When the lid is opened, at least the operation of the crushing means is stopped, and when the lid is closed, The recycling apparatus according to claim 1, wherein the recycling apparatus is configured to be operable.   The pair of spiral bodies of the crushing means are arranged so as not to interfere with each other, and are rotationally driven by individual reversible driving means so that they can be reversed by a predetermined number of rotations when receiving a predetermined rotational resistance. The recycling apparatus according to claim 1, which is configured.

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