Production plant

Abstract

To provide a production plant that can reuse gypsum included in a waste gypsum board.SOLUTION: A production plant 1 according to an embodiment includes a baking apparatus 22 for heating and drying gypsum separated from a gypsum board, a storage silo 40 for storing a dried mixed material, and a mixing apparatus 64 that mixes gypsum heated and dried by the baking apparatus 22 and a mixed material supplied from the storage silo 40. The storage silo 40 includes a cement silo 402 for storing cement, a lime silo 404 for storing quicklime, and a water purified sludge silo 406 for storing dried water purified sludge. The baking apparatus 22 is heated at 110°C-150°C for 20 minutes-60 minutes, and the mixing apparatus 64 mixes gypsum heated and dried by the baking apparatus 22, the water purified sludge supplied from the water purified sludge silo 406, and quicklime supplied from the lime silo 404.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a manufacturing plant. [Background technology]

[0002] For example, Patent Document 1 discloses a method for producing a solidification material, which includes a step of producing gypsum hemihydrate by crushing, separating, and heating discarded gypsum boards, and a step of mixing the produced gypsum hemihydrate, the purified water sludge, and quicklime, slaked lime, or cement so that the produced gypsum hemihydrate is 45 to 65 weight percent and the dried purified water sludge is 5 weight percent or more. Furthermore, Patent Document 2 discloses a method for recycling waste gypsum board in which both sides of a gypsum core material are covered with board base paper, in which the board base paper is not separated from the core material, but is left integrated with the core material, and the whole is crushed and dried to use as a sludge improvement agent. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2023-055240 A [Patent Document 2] JP 2007-161895 A Summary of the Invention [Problem to be solved by the invention]

[0004] An object of the present invention is to provide a manufacturing plant capable of recycling waste gypsum separated from waste gypsum boards. [Means for solving the problem]

[0005] The manufacturing plant of the present invention includes a heating device that heats and dries the gypsum separated from the gypsum board, a storage container that stores the mixed material in a dry state, and a mixing device that mixes the gypsum heated and dried by the heating device with the mixed material supplied from the storage container.

[0006] Preferably, the heating device heats at 110°C to 150°C for 20 to 60 minutes, the storage container includes a first storage container for storing dried water purification sludge and a second storage container for storing quicklime, and the mixing device mixes the gypsum heated and dried by the heating device, the water purification sludge supplied from the first storage container, and the quicklime supplied from the second storage container.

[0007] Preferably, the system further includes a powder recovery means for recovering fine gypsum powder from the exhaust gas from the heating device, and the mixing device mixes the gypsum heated and dried by the heating device, the fine gypsum powder recovered by the powder recovery means, the purified water sludge supplied from the first storage container, and the quicklime supplied from the second storage container.

[0008] Preferably, the system further includes a crusher that crushes the gypsum dried by the heating device, and a powder sorter that sorts the gypsum crushed by the crusher into particles having a particle size of 0.8 mm or less, and the mixer mixes the crushed gypsum having a particle size of 0.8 mm or less with the admixture.

[0009] Preferably, the method further comprises a filling device for filling a mixture of gypsum and the admixture mixed in the mixing device into a transport container formed into a bag shape from a packaging material containing polyethylene.

[0010] Preferably, the mixture mixed in the mixing device is a solidifying material, and the filling device fills the solidifying material at a temperature of 60°C or less into the transport container, which is made by weaving polypropylene fiber material into a bag shape and placing polyethylene material inside the bag.

[0011] Preferably, the mixer mixes room temperature purified water sludge with room temperature cement or room temperature quicklime so that gypsum heated and dried at 110°C to 150°C accounts for 40% to 60% of the total weight of the solidification material. Effect of the Invention

[0012] According to the present invention, it is possible to recycle waste gypsum separated from waste gypsum boards. [Brief description of the drawings]

[0013] [Figure 1] 1 is a diagram illustrating a manufacturing plant 1 according to an embodiment of the present invention. [Diagram 2] 2 is a flowchart illustrating a manufacturing method (S10) of the manufacturing plant 1 of this embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] First, the background of the present invention will be described. Gypsum boards are used in large quantities mainly as interior materials for walls and ceilings of buildings. Therefore, gypsum boards discharged as waste materials (hereinafter, waste gypsum boards) are generated at new construction sites and demolition sites of old buildings. New construction waste gypsum boards are collected by gypsum board manufacturers and reused as board raw materials, while demolition waste gypsum boards are mostly disposed of in landfills, although some are recycled as cement raw materials or soil improvement materials. Since it is expected that the number of old buildings will increase in the future, there is a problem of securing final disposal sites, and recycling of waste gypsum boards is an important issue. Therefore, according to an embodiment of the present invention, gypsum (dihydrate gypsum) separated from waste gypsum boards is actively used and recycled as a ground improvement material, so that waste gypsum boards can be properly processed.

[0015] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. However, the scope of the present invention is not limited to the illustrated examples. FIG. 1 is a diagram illustrating a manufacturing plant 1 in this embodiment. As illustrated in Fig. 1, the manufacturing plant 1 in this embodiment is a manufacturing plant that uses gypsum G separated from demolition waste gypsum boards GB to manufacture a solidification material, which is a ground improvement material. The manufacturing plant 1 is a mixing plant that manufactures a solidification material by mixing granular gypsum G with other admixtures. The manufacturing plant 1 then bags and packs the manufactured solidification material in flexible container bags 46 (hereinafter, flexcon bags 46). The manufacturing plant 1 has a drying and crushing unit 2, a pumping unit 4, a weighing and mixing packing unit 6, and a dust collecting unit 8.

[0016] (Drying and grinding unit 2) The drying and crushing unit 2 heats and dries the gypsum G in a state of gypsum dihydrate separated from the demolition waste gypsum board GB, and crushes the gypsum G that has become gypsum hemihydrate into particles of a predetermined particle size. The drying and crushing unit 2 then transports the dried and crushed gypsum G to the pressure-feeding unit 6 and the weighing, mixing and packaging unit 4, which will be described later. The drying and crushing unit 2 includes a separator 20, a calcining device 22, a magnetic separator 24, and a crusher 26.

[0017] The separator 20 is a device that separates the waste gypsum board GB into paper and gypsum G. In this example, the separator 20 separates the waste gypsum board GB into paper pieces and powdered gypsum G. The drying and crushing unit 2 then transports the separated gypsum G from the separator 20 to the calcination device 22. Note that when gypsum G separated from the waste gypsum board GB is obtained from an intermediate processing company, the separator 20 can be omitted.

[0018] The calcination device 22 is an example of a heating device according to the present invention, and is a heating device that heats and dries gypsum G, which is gypsum dihydrate separated from the waste gypsum board GB. The calcination device 22 heats and dries the gypsum G at 110° C. or higher and 150° C. or lower for 20 minutes or longer and 60 minutes or shorter. The calcination device 22 of this example heats and dries the gypsum G at 150° C. for 20 minutes. The heated and dried gypsum G changes from gypsum dihydrate to hemihydrate gypsum (calcined gypsum). Then, the drying and grinding unit 2 transports the gypsum G that has become hemihydrate gypsum from the calcination device 22 to the magnetic separator 24. The calcination device 22 of this example is, for example, a stationary hemihydrate gypsum manufacturing system (NPR-400; manufactured by Nikko Co., Ltd.).

[0019] The magnetic separator 24 separates magnetic matter (e.g., metal waste such as stapler cores) that may remain in the gypsum G from other matter, and removes the magnetic matter from the gypsum G. Then, the drying and crushing unit 2 transports the gypsum G from which the magnetic matter has been removed from the magnetic separator 24 to the crusher 26.

[0020] The pulverizer 26 is a device that pulverizes the gypsum G that has been heated and dried by the calcination device 22. The pulverizer 26 pulverizes the gypsum G to a roughly to medium crushed level. For example, the pulverizer 26 pulverizes the gypsum G to a particle size of 3 mm or less, specifically, a particle size of 0.8 mm or less. The pulverizer 26 in this example pulverizes the gypsum G to particles having a particle size of 0.4 mm or more and 0.6 mm or less, for example, a micro pulverizer (AP-4TH; manufactured by Hosokawa Micron Corporation). The pulverizer 26 also includes a sieve 260 (not shown). The sieve 260 is an example of a powder sorter according to the present invention, and sorts out the gypsum G pulverized by the pulverizer 26 into particles having a particle diameter of 3 mm or less, specifically, 0.8 mm or less. The sieve 260 in this example sorts out particles having a particle diameter of 0.4 mm to 0.6 mm. The pulverizer 26 in this example crushes again the gypsum G that does not pass through the sieve 260 and has a particle diameter exceeding 0.6 mm into particles having a particle diameter of 0.6 mm or less. The pulverizer 26 may also be provided with a function of collecting dust of the gypsum G generated during pulverization and recovering the dust. This prevents the dust of the gypsum G from spreading.

[0021] (Pumping unit 4) The pumping unit 4 supplies the stored lime, cement, and purified water sludge to a weighing, mixing, and packaging unit 6, which will be described later. The pumping unit 4 includes a storage silo 40, a temporary storage silo 42, and a pumping device 44, and the storage silo 40, the temporary storage silo 42, and the blower 44 are connected by piping.

[0022] The storage silo 40 is an example of a storage container according to the present invention, and is a storage tank for storing dry mixed materials. The dry mixed materials are dry lime, dry cement, and dry purified water sludge. The storage silo 40 includes a silo 402 for lime, a silo 404 for cement, and a silo 406 for purified water sludge. The lime silo 402 is an example of a second storage container according to the present invention, and is a storage tank for storing quicklime or slaked lime in a dry state at room temperature. The lime silo 402 of this example stores quicklime. The lime silo 402 stores powdered quicklime at room temperature with a moisture content of less than 11%, specifically, with a moisture content of the 10% range. The cement silo 404 is a storage tank for storing cement in a dry state at room temperature. The cement silo 404 stores powdered cement at room temperature with a moisture content of less than 11%, specifically, with a moisture content of the 10% range. The purified water sludge silo 406 is an example of a first storage container according to the present invention, and is a storage tank for storing purified water sludge in a dry state at room temperature. The purified water sludge silo 406 stores purified water sludge that is powdery at room temperature and has a moisture content of less than 11%, specifically, a moisture content of the 10% range.

[0023] The temporary storage silos 42 are storage tanks for temporarily storing the gypsum G and the admixture immediately before mixing. The temporary storage silos 42 include a temporary storage silo 420 for gypsum, a temporary storage silo 422 for lime, a temporary storage silo 424 for cement, and a temporary storage silo 426 for purified water sludge. The temporary gypsum storage silo 420 is a silo dedicated to gypsum G, which temporarily stores the heated, dried, and pulverized gypsum G supplied from the drying and pulverizing unit 2. The temporary gypsum storage silo 420 temporarily stores powdered gypsum G in a dry state at 100°C to 110°C, from the viewpoint that the gypsum G will solidify inside the silo if it contains moisture. That is, the temporary gypsum storage silo 420 temporarily stores gypsum G immediately after it has been fired and dried. Moreover, the temporary gypsum storage silo 420 preferably temporarily stores an amount of gypsum G that can be used up on a daily basis, for example, so as not to store gypsum G for a long period of time inside the silo. The temporary lime storage silo 422 is a silo that temporarily stores the quicklime stored in the lime silo 402. The cement temporary storage silo 424 is a silo that temporarily stores the cement stored in the cement silo 404 . The purified water sludge temporary storage silo 426 is a silo that temporarily stores the dried purified water sludge stored in the purified water sludge silo 406.

[0024] The pressure-feeding device 44 is a device for supplying, by pressure, the quicklime, cement, and purified water sludge stored in the storage silo 40 from the storage silo 40 to the temporary storage silo 42. The pressure-feeding device 44 is a blower or a compressor, and is a blower in this example.

[0025] (Weighing and mixing packing unit 6) The weighing, mixing and packing unit 6 weighs and mixes the gypsum G and the mixed material supplied from the drying and grinding unit 2, and packs the solidification material, which is a mixture of the gypsum G and the mixed material, into bags. The weighing, mixing and packing unit 6 includes a weighing device 62, a mixer 64, a filling device 65, and a flexible container bag 66.

[0026] The weighing device 62 weighs the gypsum G, quicklime, cement, and purified water sludge supplied from the temporary storage silo 42. When producing a lime-based solidification material, the weighing device 62 weighs the gypsum G, purified water sludge, and quicklime, and when producing a cement-based solidification material, the weighing device 62 weighs the gypsum G, purified water sludge, and cement. Furthermore, when producing a gypsum-based solidification material, the weighing device 62 weighs the gypsum G and purified water sludge. That is, the weighing device 62 weighs the mixed material according to the type of solidification material to be produced.

[0027] The mixer 64 is an example of a mixer according to the present invention, and is a device for mixing gypsum G, quicklime, cement, and purified water sludge. The mixer 44 mixes the gypsum G heated and dried by the calciner 22 with the mixed material supplied from the storage silo 40. The mixer 44 mixes the gypsum G heated and dried at 110°C to 150°C with the mixed material at room temperature so that the mixed material accounts for 40% to 60% of the weight of the entire solidification material. Specifically, the mixer 64 mixes the heated and dried gypsum G, fine powder of the gypsum G collected by the dust collection unit 8 described later, quicklime in a dry state at room temperature stored in a lime silo 402 described later, cement in a dry state stored in a cement silo 404, and purified water sludge in a dry state at room temperature stored in a purified water sludge silo 406. The mixer 64 appropriately mixes the gypsum G, quicklime, cement, and purified water sludge measured by the measuring device 62 to generate a solidification material that is a mixture. Specifically, in the case of a lime-based solidification material, the mixer 64 mixes the gypsum G, purified water sludge, and quicklime, and in the case of a cement-based solidification material, the mixer mixes the gypsum G, purified water sludge, and cement. In addition, in the case of a gypsum-based solidification material, the mixer 64 mixes the gypsum G and purified water sludge. That is, the mixer 64 generates a solidification material that includes at least gypsum G and purified water sludge.

[0028] The filling device 65 is an example of a filling device according to the present invention, and is a device that fills a solidification material containing at least gypsum G and purified water sludge mixed by a mixer 64 into a flexible container bag 66 described below. The filling device 65 of this example fills the flexible container bag 66 with the solidification material at 60° C. or less, specifically 50 to 60° C., so that the flexible container bag 66 does not break due to the heat of the burnt gypsum G.

[0029] The flexible container bag 66 (FIBC 66) is an example of a transport container according to the present invention, and is a transport packaging material that contains at least the solidification material containing gypsum G and purified water sludge. The FIBC 66 is formed from a fabric woven with synthetic fibers into a bag shape. Specifically, the FIBC 66 is formed by weaving a polypropylene fiber material into a bag shape and disposing a polyethylene material on the inside. The FIBC 66 is formed by disposing a polyethylene material on the inside of the FIBC 66 from the viewpoint of preventing scattering and leakage of the solidification material and moisture prevention. For example, the inner surface of the woven fabric may be laminated with a polyethylene film, or an inner bag made of polyethylene may be provided. In other words, the FIBC 66 can be said to be a packaging material formed from a packaging material containing polyethylene into a bag shape. The flexible container bag 66 contains a solidification material at a temperature lower than 120 to 130° C. The flexible container bag 66 in this example is filled by the filling device 65 with a solidification material at 60° C. or lower, specifically, 50° C. or higher and 60° C. or lower.

[0030] (Dust collection unit 8) The dust collection unit 8 is an example of a powder recovery means according to the present invention, and is a fine powder removal unit that sucks up and recovers scattered (floating) fine powder of gypsum G from the viewpoint of preventing the diffusion of dust. For example, the dust collection unit 8 sucks up and recovers the fine powder of gypsum G contained in the gas discharged from the calcination device 22 in the drying and crushing unit 2, and supplies the recovered fine powder of gypsum G to the temporary storage silo 420 for gypsum. The dust collection unit 8 also includes a bag filter 80 and an exhaust fan 82 . The bag filter 80 is a filter that collects fine powder of powdered gypsum G contained in the gas discharged from the calcination device 22. The exhaust fan 82 uses intake air to suck in the gas discharged from the baking device 22, and discharges the filtered air that has passed through the bag filter 80 to the outside. Note that, without being limited thereto, and although not shown, the dust collection unit 8 may be provided in the weighing, mixing and packing unit 6. The dust collection unit 8 may collect fine powders of gypsum G, quicklime, cement, and purified water sludge (gypsum G, etc.) scattered (floating) inside the measuring device 62 and the hopper in the weighing, mixing and packing unit 6, and supply the collected fine powders of gypsum G, etc. to the hopper.

[0031] Next, the solidifying material produced by the production plant 1 will be described. The solidification material produced by the production plant 1 is, for example, a lime-based solidification material, a cement-based solidification material, and a gypsum-based solidification material. The solidification material is produced by mixing gypsum G, purified water sludge, and quicklime or cement so that the gypsum G that has become hemihydrate gypsum is 45 weight percent or more and 65 weight percent or less, and the dried purified water sludge is 5 weight percent or more. Specifically, the solidification material is produced by mixing gypsum G at a weight ratio of 48% to 52% or less, purified water sludge at a weight ratio of 8% to 12%, and cement or quicklime at a weight ratio of 38% to 42% or less. By containing purified water sludge in the above ratio, the solidification material can suppress the generation or elution of hydrogen sulfide and fluorine from the hemihydrate gypsum. The lime-based solidification material is produced from heated and dried powdered gypsum G, dried purified water sludge, and quicklime. The lime-based solidification material in this example is quicklime from the viewpoint of improving the strength of the improved soil and slowing the reaction rate of gypsum, but quicklime may be replaced with slaked lime. The cement-based solidification material is produced from heated and dried powdered gypsum G, dried water purification sludge, and cement. The gypsum-based solidification material is produced from heated and dried powdered gypsum G and dried water purification sludge.

[0032] Next, a method for producing a solidifying material in the production plant 1 of this embodiment will be described with reference to FIG. FIG. 2 is a flow chart illustrating the manufacturing method (S10) in the manufacturing plant 1 of this embodiment. 2, in step 100 (S100), the separator 20 separates the waste gypsum board GB input by an operator into paper and gypsum G, and crushes the separated gypsum G. The separated gypsum G is gypsum dihydrate. Note that the step of S100 may be performed by an intermediate processor, and in this case, this step is omitted and the process proceeds to step S102.

[0033] In step 102 (S102), the calcination device 22 heats the gypsum G separated from the waste gypsum board GB at a temperature and for a time period that will turn the gypsum G into gypsum hemihydrate. The calcination device 22 heats the gypsum G at 110° C. or higher and 150° C. or lower for 20 minutes or longer and 60 minutes or shorter. In this example, the calcination device 22 heats the gypsum G at 150° C. for 20 minutes. The heated gypsum G turns from gypsum dihydrate into gypsum hemihydrate (calcined gypsum).

[0034] In step 104 (S104), the magnetic separator 24 removes magnetic matter that may remain in the gypsum G that has become gypsum hemihydrate. In step 106 (S106), the pulverizer 26 pulverizes the hemihydrate gypsum G into particles having a particle size of 0.4 mm to 0.6 mm, thereby obtaining gypsum G that can be recycled.

[0035] In step 108 (S108), the pumping device 44 supplies the mixed materials (quicklime, cement, and purified water sludge) stored in the storage silo 40 to the temporary storage silo 42 according to the solidification material to be produced. When producing a lime-based solidification material, the pumping device 44 supplies purified water sludge and quicklime to the temporary storage silo 42, and when producing a cement-based solidification material, the pumping device 44 supplies purified water sludge and cement to the temporary storage silo 42. Furthermore, when producing a gypsum-based solidification material, the pumping device 44 supplies only purified water sludge to the temporary storage silo 42.

[0036] In step 110 (S110), the weighing device 62 weighs the gypsum G, quicklime, cement, and purified water sludge. When producing a lime-based solidification material, the weighing device 62 weighs the gypsum G, purified water sludge, and quicklime, and when producing a cement-based solidification material, the weighing device 62 weighs the gypsum G, purified water sludge, and cement. Also, when producing a gypsum-based solidification material, the weighing device 62 weighs the gypsum G and purified water sludge. The timing at which the quicklime, cement, and purified water sludge are supplied from the temporary storage silo 42 to the weighing device 62 is roughly synchronized with the timing at which the gypsum G in a freshly fired and crushed state is supplied to the weighing device 62.

[0037] In step 112 (S112), the mixer 64 mixes the gypsum G with the mixing material depending on the type of solidification material to be produced. Specifically, when producing a lime-based solidification material, the mixer 64 mixes the gypsum G, water purification sludge, and quicklime, and when producing a cement-based solidification material, the mixer mixes the gypsum G, water purification sludge, and cement. Also, when producing a gypsum-based solidification material, the mixer 64 mixes the gypsum G and water purification sludge. In this way, the worker obtains the solidification material. For example, the mixer 64 mixes gypsum G heated and dried at 110°C to 150°C with a room temperature admixture so that the gypsum G is 40% to 60% of the total weight of the solidification material. The mixer 64 mixes the gypsum G, the purified water sludge, and quicklime or cement so that the gypsum G that has become hemihydrate is 45% to 65% by weight and the dried purified water sludge is 5% by weight or more. More specifically, the mixer 64 mixes gypsum G at a weight ratio of 48% to 52%, purified water sludge at a weight ratio of 8% to 12%, and cement or quicklime at a weight ratio of 38% to 42%. By including the purified water sludge in the above ratio, it is possible to suppress the generation or elution of hydrogen sulfide and fluorine from the hemihydrate gypsum.

[0038] In step 114 (S114), the filling device 65 fills and bags the solidification material obtained by mixing the gypsum G and the mixed material into a transport container. The filling device 65 in this example bags and packs the solidification material at 60° C. or less, specifically, at 50° C. or more and 60° C. or less, into the flexible container bag 66.

[0039] In step 116 (S116), in an environment where contact with outside air is limited, the worker allows the solidification material, which has been put into the FIBC bag 66 and is at a temperature of 50°C or higher and 60°C or lower, to dissipate heat until it reaches room temperature. In this process, inside the building, the worker cools the solidification material packed in the FIBC bag 66 to room temperature with the bag opening of the FIBC bag 66 open. After confirming that the solidification material has reached room temperature, the worker closes the bag opening of the FIBC bag 66 to complete the packaging.

[0040] As described above, according to the solidification material manufacturing plant of the present embodiment, the gypsum separated from the waste gypsum board can be actively utilized as gypsum hemihydrate, and the recycling of the discarded gypsum board can be promoted. In addition, the manufacturing plant uses purified water sludge as the solidification material, thereby suppressing hydrogen sulfide and fluorine eluted from the gypsum hemihydrate, and therefore can utilize a relatively large amount of gypsum hemihydrate. [Explanation of symbols]

[0041] 1. Manufacturing plant 2…Drying and crushing unit 20...Separator 22...Baking equipment 24...Magnetic separator 26...Crusher 4…Pumping unit 40…Storage silo 42...Temporary storage silo 44...Pressure feed device 6...Weighing and mixing packing unit 62...Measuring instrument 64...Blender 65...Filling device 66…Flexible container bag 8…Dust collection unit 80…Bag filter 82...Exhaust fan

Claims

1. A heating device for heating and drying the gypsum separated from the gypsum board; a storage container for storing the dry mixture; a mixing device that mixes the gypsum heated and dried by the heating device with the mixed material supplied from the storage container; A manufacturing plant having

2. The heating device heats at 110°C to 150°C for 20 minutes to 60 minutes, The storage container comprises: a first storage container for storing dried purified water sludge; A second storage container for storing quicklime; Including, The mixing device mixes the gypsum heated and dried by the heating device, the purified water sludge supplied from the first storage container, and the quicklime supplied from the second storage container.

2. The manufacturing plant of claim 1.

3. A powder recovery means for recovering fine gypsum powder from exhaust gas from the heating device. and The mixing device mixes the gypsum heated and dried by the heating device, the fine powder of gypsum recovered by the powder recovery means, the purified water sludge supplied from the first storage container, and the quicklime supplied from the second storage container. The manufacturing plant of claim 2.

4. A crusher that crushes the gypsum dried by the heating device; a powder sorter for sorting the gypsum crushed by the crusher into particles having a particle size of 0.8 mm or less; and The mixing device mixes the crushed gypsum having a particle size of 0.8 mm or less with the admixture. The manufacturing plant of claim 3.

5. A filling device that fills a transport container made of a polyethylene-containing packaging material in a bag shape with the mixture of gypsum and the admixture mixed in the mixing device. Further having 5. The manufacturing plant of claim 4.

6. The mixture mixed in the mixing device is a solidifying material, The filling device fills the solidification material into the transport container, which is made by weaving a polypropylene fiber material into a bag shape and disposing a polyethylene material inside the bag, with the solidification material at a temperature of 60° C. or less. The manufacturing plant of claim 5.

7. The mixing device mixes room temperature purified water sludge and room temperature cement or room temperature quicklime so that the gypsum heated and dried at 110°C to 150°C accounts for 40% to 60% of the total weight of the solidification material. The manufacturing plant of claim 6.

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