KR101341222B1 - Building interior materials having a pearlite mixed with a sludge produced from water treatment plant and preparation method thereof - Google Patents

Abstract

The present invention relates to building interior materials using pearlite and sludge and a manufacturing method thereof. The present invention includes a dehydration step, a hot air drying step, a sludge firing step, a crushing step, a tablet manufacturing step, a tablet foaming step, a pearlite firing step, a mixing step, a molding and drying step. [Reference numerals] (AA) Dewatering integer sludge;(BB) Hot air drying;(CC) Plastic process;(DD) Crushing;(EE) Producing pills;(FF) Foaming pills;(GG) Sparkling inorganic binder;(HH) Plasticizing pearlite;(II) Inorganic binder;(JJ) Stirring pill produced sludge and pearlite;(KK) Molding and drying

Description

Building interior materials having a pearlite mixed with a sludge produced from water treatment plant and preparation method

The present invention relates to a building interior material using purified sludge and pearlite and a method of manufacturing the same.

In order to produce purified water in a purified water treatment plant, it is possible to agglomerate various inorganic and organic substances contained in the purified water by using a sedimentation basin which precipitates coarse particles having a specific gravity greater than that in the purified water and inorganic polymer coagulant including PAC (Poly Aluminum Chloride). The separation process must be performed.

In this process, the production of purified sludge is essential, and its production amount is generated several hundred thousand tons per year, and many efforts have been made for the final treatment or recycling thereof.

The purified sludge has a water content of about 80%, and most of the solid part is an inorganic material composed of clay components, and is composed of some PACs (Poly Aluminum Chloride) used in the water purification process and some inorganic chemicals used in the dehydration process.

As the weathering of the clay, clay is mainly composed of silicon, aluminum and water to become clay mineral.

The structure is similar to mica and has a two- or three-layer structure. Water, calcium, iron, and magnesium are contained between the layers to form various clay minerals.

Clay contains water between the layers and has the characteristic of volume expansion by thermal expansion and evaporation under high temperature heating conditions.

In other words, dry sludge having a structure similar to clay also causes volume expansion under high temperature heating conditions, resulting in low specific gravity.

As a method of recycling purified water sludge, 70% or more of the purified sludge is made of clay, and after dehydration and drying, a suitable binder is added and recycled to building materials such as blocks, and cover material and horticultural soil after drying. And recycling to deodorant materials.

As a technology related to the treatment of purified sludge, "Building interior board containing purified water sludge and vermiculite and its manufacturing method" (Korean Patent Publication No. 10-1143019, Patent Document 1) mixes organic-inorganic sludge with coal ash, waste gypsum, etc. And cement, and then mix and stir with additives such as solidified materials, and compacting or extruding them to recycle them to civil construction materials, and the method of forming building materials such as brick panels using sewage sludge. .

In particular, a technique for providing a board for building interior using the vermiculite with improved hardness and flexural strength is disclosed.

Looking at the specific content, 10-90% by weight of purified water sludge and 90-10% by weight of vermiculite are simultaneously calcined or separately calcined and mixed at 500-1,000 ° C, and then based on 100 parts by weight of the mixture of the calcined purified water sludge and vermiculite. A production method is disclosed in which a mixture is prepared by adding 0.1-30 parts by weight of an inorganic adhesive, a board is prepared by molding the prepared mixture, and then hot dried.

The patent document 1 is characterized by using a vermiculite having a porous and good absorption capacity.

However, while the amount of purified sludge is large, the amount of vermiculite is limited, resulting in an increase in product cost.

In addition, when using vermiculite there was also a problem that the color of the interior material appears dark.

In particular, vermiculite has a specific surface specific gravity of 0.1 to 0.2, while the sludge has a general specific gravity of more than 1 bar, and when the two are mixed and stirred, there is a problem in that layer separation occurs evenly.

Moreover, when the size of the agitation tank for mass production increases, the uniformity of the product is greatly reduced, and the standard strength, thickness, specific gravity distribution, and density of the produced product are not constant, and this causes crack generation. There is a frequent problem, there was a problem that the weight imbalance of the produced product occurs.

KR 10-1143019 (2012.04.27)

Building interior material using the purified water sludge and pearlite of the present invention and a method for manufacturing the same to solve the problems occurring in the prior art as described above, using a small weight, excellent water permeability to increase the deodorization rate and air purification ability To provide excellent interior materials.

In addition, it is intended to provide a lighter color of the interior material compared to the interior material using the vermiculite.

In particular, calcined and crushed purified water sludge having an apparent specific gravity different from that of pearlite, which is combined with an inorganic binder to prepare a ring form, and then foamed to increase the surface area by making the apparent specific gravity similar to pearlite, and then calcined pearlite And compression molding to achieve even mixing in the pearlite and mixing agitation process.

As such, evenly mixed with pearlite is intended to provide a uniform interior material with uniform physical properties such as strength, thickness, and specific gravity distribution.

Building interior material manufacturing method using the purified water sludge and pearlite of the present invention, in order to solve the above problems, a dehydration step of preparing and dewatering the purified water sludge; A hot air drying step of hot air drying the dehydrated purified water sludge; A water purification sludge firing step of baking the purified water sludge at a temperature of 700 to 900 ° C .; A crushing step of crushing the calcined purified sludge; A pill manufacturing step of mixing the crushed purified water sludge with the expandable inorganic binder in a weight ratio of 1: 0.5 to 1.5 to produce a ring; A circular foaming step of passing the prepared ring through a heating hot plate at 400 to 500 ° C. to form foamed particles; A pearlite firing step of preparing and firing pearlite; A mixing step of preparing an inorganic binder and mixing and stirring the ring foamed in the circular foaming step and the pearlite fired in the perlite firing step; It is configured to include; forming a drying step of drying the compression mixture by transferring the mixture mixed in the mixing step to a hot plate.

At this time, the foam and the pearlite foamed in the mixing step is 1: 1: weight ratio of 0.9 to 19, the inorganic binder is characterized in that added to 5 to 100 parts by weight relative to 100 parts by weight of the mixture of the foamed ring and pearlite.

In addition, the pill manufacturing step is mixed with the crushed purified water sludge and the expandable inorganic binder, and then put into a cylinder and rotated to produce a ring form, then crushed into a powder state and then put into a cylinder and rotated again to a diameter of 0.5 ~ It is characterized in that the manufacturing of the ring of 1.5mm size.

Alternatively, a purified water sludge firing step of preparing and firing purified water sludge; A crushing step of crushing the calcined purified sludge; Preparing a ring by mixing the crushed purified sludge and the expandable inorganic binder; A circular foaming step of passing the prepared ring through a heating hot plate and foaming it; A pearlite firing step of preparing and firing pearlite; A mixing step of preparing an inorganic binder and mixing and stirring the ring foamed in the circular foaming step and the pearlite fired in the perlite firing step; It is configured to include; forming a drying step of drying the compression mixture by transferring the mixture mixed in the mixing step to a hot plate.

Building interior material using the purified water sludge and pearlite of the present invention is characterized in that it contains the purified sludge and calcined pearlite produced by the above production method.

According to the present invention, a low-weight, permeable pearlite is used to increase the deodorization rate and provide an excellent air purification capability.

In addition, the interior material is provided in a lighter color than the interior material utilizing vermiculite.

In particular, calcined and crushed purified water sludge having an apparent specific gravity different from that of pearlite, which is combined with an inorganic binder to prepare a ring form, and then foamed to increase the surface area by making the apparent specific gravity similar to pearlite, and then calcined pearlite By compression molding with the pearlite it is evenly mixed in the mixing and stirring process.

As such, evenly mixing with pearlite provides a uniform interior material with uniform physical properties such as strength, thickness, and specific gravity distribution.

1 is a process chart showing a method for manufacturing building interior materials using purified sludge and pearlite of the present invention.
2 is a product picture according to an embodiment of the present invention.
3 is a product picture according to a comparative example in the present invention.

Hereinafter, the building interior material using the purified water sludge and pearlite of the present invention and a manufacturing method thereof will be described in detail with reference to the accompanying drawings.

1. Dehydration Step

Purified sludge is prepared and dewatered.

In order to produce purified water in a purified water treatment plant, it is possible to agglomerate various inorganic and organic substances contained in the purified water by using a sedimentation basin which precipitates coarse particles having a specific gravity greater than that in the purified water and inorganic polymer coagulant including PAC (Poly Aluminum Chloride). The separation process must be performed.

In this process, purified sludge is produced. The purified sludge has a water content of about 80%.

As such, when a calcination process to be described below is used by using the purified water sludge as it is, a large amount of irregular voids may be formed during the calcination process, which may lower the strength of the produced product.

Therefore, it is preferable to remove a large amount of water, and to dry and calcinate.

The dehydration method may be dewatered through centrifugal dehydration or compression dewatering by putting purified sludge into a rotating cylinder, such as a known dehydrator.

2. Hot air drying step

The dehydrated sludge is hot-air dried to reduce the water content of the purified sludge to about 20 to 50%.

3. Water purification sludge firing stage

The purified sludge is calcined at a temperature of 700 to 900 ° C.

The firing process increases the strength when the purified sludge solidifies into a large number of lumps of irregular size.

4. Shredding Step

The calcined purified sludge is crushed using a crusher or the like.

The reason for the crushing treatment is to obtain a product of uniform quality in the process described below by making the powder of small particle size because the size of the calcined purified water sludge which has been subjected to the purified water sludge firing step is irregular.

5. Reproduction phase

The crushed purified sludge and the expandable inorganic binder are mixed at a weight ratio of 1: 0.5 to 1.5 to prepare a ring.

In the ring manufacturing step, the crushed purified water sludge and the inorganic binder are mixed and then put into a cylinder, and then rotated to produce a ring shape, and then crushed into a powder state, then put into a cylinder and rotated again to have a diameter of 0.5 to 1.5. Prepared in mm sized rings.

When the water is first rotated by adding crushed purified water sludge and an expandable inorganic binder, particles are irregular in size and have a relatively large ring shape.

In order to reduce the size of the ring, it is crushed again to reduce the size, and then put into a cylinder and rotated to produce a ring having a small particle size.

Through this process is to produce a ring shape is 0.5 ~ 1.5mm in diameter.

This process is to make the ring of the uniform size as much as possible the quality of the interior material produced can be uniform.

In this case, the foamable binder may be a homopolymer of vinyl chloride or vinylidene deteriorated or a copolymer of ethylene, propylene, vinyl acetate, acrylic acid, methacrylic acid, and styrene monomer, which may be copolymerized with the monomer.

More preferably, the inorganic binder may be a mixture of sodium silicate and sodium silicate fluoride, or mixed with ethylene alumina or magnesium phosphate.

In addition, it may be configured by mixing the penetration liquid into sodium silicate and sodium silicate.

At this time, sodium silicate and sodium silicate is preferably mixed in a weight ratio of 4 to 6: 1, alumina phosphate or magnesium phosphate may be mixed in a weight ratio of about 1: 0.5 to 2 compared to sodium silicate.

In addition, a general inorganic foam binder may be used, but alumina cement may be used.

6. Round foaming stage

The prepared ring is passed through a heating hot plate of 400 ~ 500 ℃ to form foamed particles.

Foaming the prepared ring increases the surface area of the ring to lower specific gravity during compression molding, and mixing with pearlite having light specific gravity makes it possible to produce a homogeneous product, and in particular, to have uniform color. to be.

In addition, it is to improve the air purification function by widening the pores as the respective fired products are again processed at a high temperature.

7. Perlite firing step

Apart from the treatment of the purified sludge, pearlite is prepared and fired.

The firing temperature of pearlite is preferably baked in the range of 500 to 1,000 ° C.

8. Mixing Step

The inorganic binder is prepared and mixed with the perlite foamed in the circular foaming step and perlite calcined in the perlite firing step, followed by stirring.

At this time, the foamed ring and perlite are mixed at a weight ratio of 1: 0.9 to 19, and the inorganic binder is preferably added at 5 to 100 parts by weight relative to 100 parts by weight of the mixture of the foamed ring and perlite.

As the inorganic binder, inorganic binders such as silicate-based, alumina-based, magnesium-based and potassium-based may be used alone or in combination, but are not limited thereto.

9. Molding drying step

The mixture mixed in the mixing step is transferred to a hot plate, compression molded, and dried.

At this time, the molding machine uses a variety of forms, such as board form, block form, but is not particularly limited.

After the compression molding is finished, the interior of the present invention is manufactured by drying at a high temperature using a hot air dryer or the like.

Hereinafter, embodiments of the present invention will be described. The following examples are intended to illustrate the invention but are not limited by the examples.

<Example 1> Construction of building interior materials using purified sludge and pearlite

First, the purified water sludge generated in the water treatment process was added to the dehydrator to dehydrate the water content to 60% and then added to the hot air dryer to dry until the water content is 40%.

Then, the purified sludge was calcined at a temperature of 800 ° C. in the kiln, and then put into a crusher, and crushed to have a particle size of about 0.2 to 0.5 mm.

Then, alumina cement was purchased and prepared as an inorganic foam binder, and then 50 kg of the crushed purified sludge and 50 kg of the inorganic foam binder were mixed and then put in a cylinder to be mixed with each other to form a ring.

Then, the mixture, which was first formed in a ring form, was put again in a crusher, and crushed to have a particle size of about 0.2 to 0.5 mm, and then mixed in a cylinder to prepare a ring having a size of about 0.5 to 1.5 mm.

On the other hand, after preparing a pearlite separately, it was prepared by firing at a temperature of 800 ℃ in a kiln, and prepared by purchasing a liquid inorganic binder on the market.

The inorganic binder was prepared containing liquid sodium silicate and silicon dioxide.

Subsequently, 20 kg of the prepared ring, 20 kg of calcined pearlite, and 10 kg of an inorganic binder were mixed in the stirrer, mixed, stirred, and put into a board molding machine, followed by compression molding, followed by drying with a hot air dryer, thereby preparing the interior material of Example 1.

&Lt; Comparative Example 1 &

Proceed in the same manner as in Example 1, but after the water treatment sludge is calcined, pulverized, ring-prepared, ring-foamed, and then stirred with the calcined pearlite and inorganic binder immediately molded to prepare the interior material of Comparative Example 1 .

<Experimental Example 1>

The total absorption and the surface absorption of the interior of Example 1 were investigated according to KS F 3504: 2007.

Item Example 1 standard Total Absorption Rate (%) 45 KS F 3504: 2007 Surface Absorption (g) 25 KS F 3504: 2007

As a result, as shown in Table 1, the interior material of Example 1 was irradiated at 45%, surface absorption of 35g.

In view of these results, it is determined that the product of Example 1 has an excellent absorption rate and surface absorption amount, and thus has high air purification ability and deodorization performance.

In addition, photographs of the interior materials of Example 1 and the interior materials of Comparative Example 1 were photographed, and are shown in FIGS. 1 and 2.

2 shows the interior material of Example 1, and FIG. 3 shows the interior material of Comparative Example 1. FIG.

As shown in the drawing, the interior of the interior material of Example 1 is distributed evenly compared to the interior material of Comparative Example 1, it can be seen that the color is also uniform and bright overall, unlike Comparative Example 1.

This is the building interior material using the purified water sludge and pearlite of the present invention prepared by the above production method, the foamed foamed purified water sludge and calcined pearlite, and after the purified water sludge is fired, crushed and then bonded with the expandable inorganic binder Since it is formed in a small ring shape and then foamed at a high temperature again, the surface specific gravity becomes as similar to pearlite as possible, and its size becomes uniform as compared with the prior art, which is simply fired in one time. .

The interior material according to the present invention will be able to be formed in various shapes such as a board or a block according to the molding method.

Claims (5)

In the manufacturing method of building interior materials,
A dehydration step of preparing and treating the purified sludge;
A hot air drying step of hot air drying the dehydrated purified water sludge;
A water purification sludge firing step of baking the purified water sludge at a temperature of 700 to 900 ° C .;
A crushing step of crushing the calcined purified sludge;
A pill manufacturing step of mixing the crushed purified water sludge with the expandable inorganic binder in a weight ratio of 1: 0.5 to 1.5 to produce a ring;
A circular foaming step of passing the prepared ring through a heating hot plate at 400 to 500 ° C. to form foamed particles;
A pearlite firing step of preparing and firing pearlite;
A mixing step of preparing an inorganic binder and mixing and stirring the ring foamed in the circular foaming step and the pearlite fired in the perlite firing step;
Configured to transfer the mixture mixed in the mixing step to a hot plate, followed by compression molding to dry the molding drying step;
Manufacturing method of building interior materials using purified sludge and pearlite.
The method of claim 1,
Ring and pearlite foamed in the mixing step is mixed in a weight ratio of 1: 0.9 to 19,
The inorganic binder is added in an amount of 5 to 100 parts by weight based on 100 parts by weight of the mixture of the foamed ring and pearlite,
Manufacturing method of building interior materials using purified sludge and pearlite.
3. The method of claim 2,
In the manufacturing step, the crushed purified sludge and the expandable inorganic binder are mixed and then put into a cylinder, and then rotated to prepare a ring form, and then crushed into a powder state and then put into a cylinder and then rotated again to have a diameter of 0.5 to 1.5 mm. Characterized in that the production of a ring of the size,
Manufacturing method of building interior materials using purified sludge and pearlite.
delete In building interior materials,
It is produced by the manufacturing method of any one of claims 1 to 3,
Calcined foamed purified water sludge and calcined pearlite, characterized in that
Building interior materials using purified sludge and pearlite.

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