JP2008024563A - Waste gypsum heat regeneration treatment equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a waste gypsum heat regeneration treatment apparatus which can be installed easily by integrating each device of the waste gypsum heat regeneration treatment apparatus into a compact and can be transported by a vehicle.
SOLUTION: A rotary kiln 4 having a burner 3 is rotatably mounted at a substantially central portion of a tilted gantry 2, and a waste gypsum storage hopper 5 is mounted at one end of the gantry 2. A screw feeder 7 for supplying waste gypsum to the rotary kiln 4 is provided. A discharge hopper 8 that discharges gypsum heat-treated by the rotary kiln 4 is mounted on the other end of the gantry 2, and a bag filter 10 that captures gypsum fine particles in the exhaust gas is mounted above the discharge hopper 8. By doing so, the whole apparatus is integrated and comprised compactly. In addition, the size is such that the vehicle can be transported.
[Selection] Figure 1

Description

  TECHNICAL FIELD The present invention relates to a waste gypsum heat regeneration processing apparatus that heats and recycles waste gypsum in the form of dihydrate gypsum obtained by crushing and separating waste gypsum board that is building waste.

  Conventionally, most of the waste gypsum board that is generated in large quantities due to the dismantling of buildings has been disposed of by landfill, etc., but the waste gypsum board is managed from stable industrial waste by the revision of the Waste Disposal Law. From the viewpoint of soaring processing costs associated with the shift to industrial waste and effective utilization of resources, it is desired to separate and recover gypsum from waste gypsum board.

By the way, gypsum is roughly classified into three types: dihydrate gypsum (CaSO ₄ · 2H ₂ O), hemihydrate gypsum (CaSO ₄ · 1 / 2H ₂ O), and anhydrous gypsum (CaSO ₄ ). When dihydrate gypsum is heated to about 130 ° C. or higher, it is rearranged to hemihydrate gypsum, and when heated to about 180 ° C. or higher, it is transferred to type II anhydrous gypsum via type III anhydrous gypsum. In addition, when hydration treatment is performed on hemihydrate gypsum, the hydration reaction proceeds rapidly and rearranges to dihydrate gypsum and hardens in a short time. Does not advance. It has been found that type III anhydrous gypsum absorbs moisture in the atmosphere strongly, so that it can be easily converted to hemihydrate gypsum if it is allowed to stand naturally.

  Gypsum such as gypsum board is in the form of dihydrate gypsum, and even if it is treated with water, it does not hydrate and does not harden. It can be cured in a short time and can be effectively reused as, for example, a soil solidifying material.

  In Patent Document 1 (Japanese Patent Laid-Open No. 2001-122645), waste gypsum board or the like is heated to a predetermined temperature under atmospheric pressure or under pressure to form a half-water gypsum, and this half-water gypsum is used as a raw material for a soil solidifying material. It is described what was effectively used. Patent Document 1 does not describe a specific device as a heating means. However, for example, many documents such as Patent Document 2 (Japanese Patent Laid-Open No. 2004-269299) and Patent Document 3 (Japanese Patent Laid-Open No. 2004-136206). As shown, the rotary kiln is often used as a heat treatment apparatus for waste gypsum.

The waste gypsum heat treatment equipment is composed of waste gypsum storage hopper, waste gypsum heat treatment rotary kiln, dust collector, etc. The equipment is installed by assembling with the layout of.
JP 2001-122645 A JP 2004-269299 A JP 2004-136206 A

  However, when each device constituting the waste gypsum heat treatment device is transported in pieces and assembled on site, it takes time for installation work, and the device becomes almost stationary, which occurs at the time of building demolition. It was necessary to transport all of the waste gypsum board to the processing plant where the waste gypsum heat treatment device was installed, which resulted in room for consideration, such as high transportation costs and poor processing efficiency.

  In view of the above points, the present invention is a waste gypsum heat regeneration processing apparatus that can be easily installed and transported by a vehicle by integrating each device of the waste gypsum heat regeneration processing apparatus into a compact configuration. It is an issue to provide.

  In order to solve the above-mentioned problem, a waste gypsum heat regeneration processing apparatus includes a gantry inclined at a predetermined angle with respect to the longitudinal direction, and a rotary kiln having a hot air supply burner at a substantially central portion of the gantry can freely rotate. A storage hopper for storing waste gypsum is mounted on one end of the gantry and provided with waste gypsum supply means for supplying waste gypsum from the storage hopper to the rotary kiln, while a rotary kiln is provided on the other end of the gantry. A discharge hopper that discharges the heat-treated gypsum is mounted, and a dust collector that captures the gypsum fine particles contained in the exhaust gas from the rotary kiln is mounted above the discharge hopper, and the gypsum and dust collector discharged from the rotary kiln It is characterized in that it is equipped with a transfer means for combining and discharging gypsum fine particles captured in this way.

  In addition, the length and width of the gantry are set to a size that can be loaded on a transport vehicle.

  According to the heat regeneration processing apparatus of the present invention, the waste gypsum heat regeneration processing apparatus includes a gantry inclined at a predetermined angle with respect to the longitudinal direction, and a rotary kiln having a burner for supplying hot air at a substantially central portion of the gantry. The storage hopper for storing waste gypsum is mounted on one end of the gantry, and equipped with waste gypsum supply means for supplying the waste gypsum from the storage hopper to the rotary kiln, while the other end of the gantry has A discharge hopper that discharges the gypsum heat-treated in the rotary kiln is mounted, and a dust collector that captures the gypsum fines contained in the exhaust gas from the rotary kiln is mounted above the discharge hopper, and the gypsum discharged from the rotary kiln And the gypsum fine particles captured by the dust collector are combined and discharged, so the equipment is integrated into a compact configuration and installed locally. With it can be performed easily. In addition, if the device is of a size that can be loaded onto a transport vehicle, it can be easily transported to any location, and it can be transported to a place where waste gypsum is temporarily stored, a building demolition site, etc. Waste gypsum can be treated efficiently. In addition, if waste gypsum, which is industrial waste generated at the building demolition site, is treated locally, the amount of industrial waste that goes out of the demolition site to the outside can be suppressed.

  The waste gypsum heat regeneration processing apparatus of the present invention includes a gantry inclined at a predetermined angle with respect to the longitudinal direction. A rotary kiln equipped with a burner for supplying hot air at one end is rotatably mounted at a substantially central portion of the frame, and waste gypsum obtained by crushing and separating waste gypsum board on the inclined side of one end of the frame And a screw feeder for quantitatively supplying waste gypsum from the storage hopper into the rotary kiln. In addition, a discharge hopper that discharges the gypsum that has been heat-treated in the rotary kiln is mounted on the low slope side of the other end of the gantry, and the gypsum fines contained in the exhaust gas from the rotary kiln is placed above the discharge hopper. It is equipped with a bag filter that is a dust collector to capture. And the transfer means which combines the gypsum discharged | emitted from a rotary kiln and the gypsum fine particle part caught with the bag filter and discharges is mounted. Further, the length and width of the gantry are set to a size that can be loaded on a transport vehicle.

  For example, when reclaiming waste gypsum board at an office where waste gypsum is temporarily stored or at the site of building demolition, etc., first, the waste gypsum heating regeneration treatment equipment is loaded on the transport vehicle and put on site. Carry in and install. And the substantially granular waste gypsum which crushes and sorts waste gypsum board with a crusher or a sorter is thrown into the storage hopper of a processing apparatus, and is stored. At this time, the waste gypsum is in the form of dihydrate gypsum, and the burner combustion amount is controlled so that it becomes a temperature at which the gypsum is efficiently transferred to hemihydrate gypsum, for example, 100 to 200 ° C., preferably 130 to 180 ° C. When waste gypsum is supplied from the storage hopper to the rotary kiln while supplying hot air into the rotary kiln, the waste gypsum is heated during the rolling down of the kiln, and most of the dihydrate gypsum is translocated to hemihydrate gypsum. It is discharged sequentially to the discharge hopper. On the other hand, fine gypsum fine particles are scattered along with the exhaust gas, captured by the downstream bag filter, and transferred to the flexible container bag by the transfer means while joining with the gypsum discharged from the rotary kiln.

  In this way, the waste gypsum heat regeneration treatment device is integrated and compactly configured by mounting various devices such as a rotary kiln, storage hopper, discharge hopper, dust collector, etc. on the gantry, so installation on site is easy Can be done. Further, if the apparatus is of a size that can be loaded on a transport vehicle, it can be easily transported anywhere, and waste gypsum can be processed on-site efficiently.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  In the figure, 1 is a waste water gypsum in the state of dihydrate gypsum obtained by crushing waste gypsum board generated at the site of building demolition, etc. A waste gypsum heat regeneration processing device that regenerates as a gypsum state, for example, a length and width size that can be loaded on a transport vehicle of about 10 tons and about 4 degrees with respect to the longitudinal direction. A gantry 2 that is inclined is provided.

  A cylindrical rotary kiln 4 having a hot air supply burner 3 at one end and a large number of scraping blades (not shown) around the inner peripheral wall is rotatably mounted at a substantially central portion of the gantry 2. The motor is driven to rotate at a predetermined speed by a driving motor (not shown). In addition, a storage hopper 5 for storing waste gypsum is mounted on the side of the burner 3 having a high inclination at one end of the gantry 2, and the upper opening of the storage hopper 5 is included in the crushed waste gypsum. And a grinder 6 that separates and removes lump or the like having a predetermined particle size, and a screw feeder as waste gypsum supply means for supplying the waste gypsum in the hopper to the rotary kiln 4 at the lower end of the storage hopper 5. 7 is provided.

  On the other hand, a discharge hopper 8 for temporarily storing gypsum discharged from the rotary kiln 4 is mounted on the other end of the gantry 2 opposite to the burner 3 side. A screw feeder 9 for feeding gypsum to the outside is provided. A bug filter 10 is mounted on the upper portion of the discharge hopper 8 as a dust collector for capturing gypsum fine particles contained in the exhaust gas derived from the rotary kiln 4 and is substantially integrated. The exhaust gas inlet 11 of the filter 10 is directly connected to the outlet side end of the rotary kiln 4 without a duct or the like, so that the apparatus is made compact.

  The bag filter 10 is provided with a plurality of substantially cylindrical filter cartridges 12. The bag filter 10 can be made compact by adopting a so-called pleated filter that forms a large number of pleats on its surface to increase the surface area. Can be planned. The filter cartridge 12 is provided with a backwash device 13 that emits a backwash air pulse above the filter cartridge 12, and the gypsum fine particles adhering to the surface of the filter cartridge 12 fall into the lower discharge hopper 8 during backwashing. It is collected and transferred to the outside through the screw feeder 9 while joining with gypsum discharged from the rotary kiln 4.

  Further, a wind exhaust device 14 for exhaust gas derivation is provided on the side of the bag filter 10, and the exhaust device 14 and the exhaust port on the bag filter 10 are connected by an exhaust gas derivation duct 15. Further, an inspection door 16 is provided at the upper part of the exhaust gas outlet duct 15 so as to be freely opened and closed, so that it can be opened easily when the filter cartridge 12 is inspected and replaced so that the work can be easily performed.

  Further, the power control panel 17 is mounted on the gantry 2, and the waste gypsum supply control to the rotary kiln 4, the rotation control of the rotary kiln 4, the combustion control of the burner 3, the feed control of the heated gypsum, the bag filter 10 Various control of the apparatus such as backwash timing control of the exhaust gas and suction control of exhaust gas by the exhaust fan 14 is performed.

  For example, when reclaiming waste gypsum board at a business site where waste gypsum is temporarily stored or at the site of building demolition, etc., first, the waste gypsum heat regeneration processing device 1 is loaded on the loading platform of the transport vehicle. Transported and lowered to the vicinity of the processing site. The waste gypsum to be reclaimed should be obtained by crushing waste gypsum board to a suitable particle size with a crusher and selecting and removing impurities such as paper pieces. At this time, the waste gypsum is in the form of dihydrate gypsum, and the burner of the rotary kiln 4 is adjusted so that the waste gypsum is efficiently converted to hemihydrate gypsum, for example, 100 to 200 ° C, preferably 130 to 180 ° C. 3 is controlled. The combustion control of the burner 3 may control the burner combustion amount based on the gypsum temperature discharged from the rotary kiln 4, but an exhaust gas temperature sensor (not shown) is disposed on the outlet side of the rotary kiln 4, If the exhaust gas temperature detected by the exhaust gas temperature sensor is, for example, about 130 to 180 ° C., the burner combustion amount is adjusted to control the temperature of gypsum discharged from the rotary kiln 4 so that the temperature controllability is also achieved. The fine waste gypsum scattered from the rotary kiln 4 and captured by the bag filter 10 is also preferable because it can be recovered at a preferable temperature.

  Then, when waste gypsum is supplied to the rotary kiln 4 from the storage hopper 5 via the screw feeder 7 while supplying hot air from the burner 3 into the rotary kiln 4, the waste gypsum is predetermined while rolling down in the kiln. After being heat-treated at the temperature and gradually displaced from dihydrate gypsum to hemihydrate gypsum and discharged to the discharge hopper 8, it is transferred to the outside by the screw feeder 9. On the other hand, gypsum fine particles having a relatively fine particle size flow to the bag filter 10 along with the exhaust gas derived from the rotary kiln 4 and are captured. Then, when the gypsum fine particles adhering to the surface of the filter cartridge 12 are backwashed by the backwashing device 13, they fall into the lower discharge hopper 8 and merge with the gypsum discharged from the rotary kiln 4 to the screw feeder 9. Then, it is transferred to the outside and collected in a flexible container bag.

  As described above, the waste gypsum heat regeneration processing apparatus 1 according to the present invention is configured to mount various devices such as a waste gypsum storage hopper 5, a rotary kiln 4 for heating the waste gypsum, and a bag filter 10 on the mount 2. Therefore, the apparatus is integrated and compactly configured, and the apparatus can be easily installed. In addition, if the device is of a size that can be loaded onto a transport vehicle, it can be easily transported to any location, and the waste gypsum can be efficiently transported to an office or temporary demolition site where the waste gypsum is temporarily stored. It can also be processed locally.

  In the present embodiment, a mobile example is described in which the waste gypsum heat regeneration processing apparatus 1 is brought into an establishment or a demolition site of a building that temporarily stores the waste gypsum to heat and recycle the waste gypsum. However, it may be installed stationary in the processing plant. Further, the waste gypsum heat regeneration treatment apparatus 1 is integrated and compact, but it may be mounted on a vehicle after being somewhat disassembled during transportation. Further, although the gantry 2 on which the rotary kiln 4 is mounted is tilted by a predetermined angle with respect to the longitudinal direction, only the rotary kiln 4 may be tilted by a predetermined angle without tilting the gantry 2. Furthermore, although the co-current heating type rotary kiln 1 is employed, it is also possible to employ a so-called countercurrent heating type rotary kiln in which waste gypsum and hot air supply directions face each other.

It is explanatory drawing which shows one Example of the heat reproduction processing apparatus of the waste gypsum based on this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Waste gypsum heat reproduction processing apparatus 2 ... Stand 3 ... Burner 4 ... Rotary kiln 5 ... Storage hopper 7 ... Screw feeder (waste gypsum supply means)
8 ... Discharge hopper 9 ... Screw feeder (transfer means)
10 ... Bug filter (dust collector) 11 ... Exhaust gas inlet 14 ... Blower

Claims (2)

  A rotary kiln having a gantry inclined at a predetermined angle with respect to the longitudinal direction, a rotary kiln having a hot air supply burner mounted in a substantially central portion of the gantry, is rotatably mounted, and a storage hopper for storing gypsum at one end of the gantry A waste gypsum supply means for supplying waste gypsum from the storage hopper to the rotary kiln, and a discharge hopper for discharging the gypsum heat-treated in the rotary kiln is mounted on the other end of the gantry, and the discharge hopper Equipped with a dust collector that captures the gypsum particles contained in the exhaust gas from the rotary kiln, and a transfer means that combines the gypsum discharged from the rotary kiln and the gypsum particles captured by the dust collector and discharges them. An apparatus for heating and recycling waste gypsum characterized by the above.   2. The waste gypsum heat regeneration processing apparatus according to claim 1, wherein the length and width of the gantry are of a size that can be loaded on a transport vehicle.

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