KR101153906B1 - The fabrication of eco-friendly deodorizing panel for the removal of harmful gas - Google Patents

Abstract

Disclosed is an environmentally friendly deodorizing panel manufacturing method capable of effectively removing TVOC and formaldehyde using diatomaceous earth and zeolite. The present invention provides a method for producing an ALC deodorizing panel, characterized in that a panel is manufactured by molding and steam curing a raw material including 3 to 20 parts by weight of diatomaceous earth and 3 to 20 parts by weight of zeolite based on 100 parts by weight of the ALC solid composition. . The present invention can provide an ALC panel which simultaneously removes TVOC and formaldehyde and maintains sufficient mechanical properties while improving the removal of NO ₂ and O ₃ .

Description

The fabrication of eco-friendly deodorizing panel for the removal of harmful gas

The present invention relates to an environmentally friendly deodorizing panel.

Autoclaved Lightweight Concrete (ALC) is a kind of lightweight concrete that reduces the consumption of natural resources by dispersing fine bubbles in the concrete using foaming agents to reduce the weight of the natural resources. It is produced and sold as a form. In addition, it exhibits excellent performance in light weight, heat insulation, workability, etc. which are general advantages of light weight concrete.

However, ALC is excellent in light weight, heat insulation, and workability, but has high hygroscopicity, and has disadvantages in mechanical properties such as compressive strength, tensile strength, and impact resistance. In order to make up for the shortcomings of these mechanical properties and to maintain the inherent advantages of ALC, such as light weight, insulation, and workability, it is possible to manufacture excellent ALC and develop functional ALC panel that can remove deodorant and environmentally harmful substances. need.

Recently, as the use of excessive fossil fuels and automobiles continues to increase, the generation of volatile organic compounds (VOCs) such as NOx, CO, and benzene hydrocarbon compounds is increasing. In the case of a space where the inflow of fresh air is limited, the concentration of environmentally harmful substances increases, which can seriously reduce indoor air quality. However, in the case of panels used as interior and exterior materials for building, product development technology applicable to multi-use facilities requiring environmental protection and removal of environmentally harmful substances is weak.

It is an object of the present invention to provide an ALC deodorizing panel which simultaneously removes TVOC and formaldehyde and maintains sufficient mechanical properties while improving the removal ability of NO ₂ and O ₃ and a method for producing the same.

In order to achieve the above technical problem, the present invention provides an ALC panel comprising molding and steam curing a raw material comprising 3 to 20 parts by weight of diatomaceous earth and 3 to 20 parts by weight of zeolite based on 100 parts by weight of the ALC solid composition. Provided are methods of making a deodorizing panel.

In the present invention, the raw material 10 to 30 parts by weight of activated carbon may be further included.

In the present invention, the ALC solid content is (a) 30 to 55% by weight of siliceous raw material, (b) 25 to 40% by weight of Portland cement, (c) 15 to 25% by weight of lime, and (d) 0.1 to 5% by weight of aluminum powder. It is preferable to include.

In addition, the zeolite in the method of the present invention is laumontite, erionite, chabazite, clinoptiolite, analcime, mordenite, ZSM-5, A, beta, X, Y type zeolite

 And it is preferred that any one selected from the group consisting of a combination thereof.

The present invention also provides an ALC deodorizing panel comprising 3 to 20 parts by weight of diatomaceous earth and 3 to 20 parts by weight of zeolite with respect to 100 parts by weight of ALC solid composition.

In addition, the zeolite in the ALC deodorization panel is preferably any one selected from the group consisting of laumontite, erionite, chabazite, clinoptiolite, analcime, mordenite, ZSM-5, A, beta, X, Y type zeolite and combinations thereof.

The present invention has the advantage of simultaneously removing TVOC and formaldehyde using diatomaceous earth and zeolite, and maintaining sufficient mechanical properties while improving the removal ability of NO ₂ and O ₃ .

1 is a graph measuring the removal efficiency of the mixed gas of toluene and formaldehyde in Examples and Comparative Examples of the present invention.
2 is a graph measuring the removal efficiency of NO ₂ of the examples and comparative examples of the present invention.
3 is a graph measuring the removal efficiency of O ₃ of the Examples and Comparative Examples of the present invention.
4 is a graph measuring the compressive strength of the Examples and Comparative Examples of the present invention.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

The panel of the present invention is made by mixing and curing the ALC raw material composition, heavy oil ash and diatomaceous earth. Looking at the raw material composition used to manufacture the panel of the present invention is as follows.

a. ALC Raw Material Composition

In the present invention, the ALC panel manufacturing composition and manufacturing method in the present invention may be used a conventional ALC composition and manufacturing method. For example, the solids composition for producing ALC usable in the present invention is (a) 30 to 55% by weight siliceous raw material, (b) 25 to 40% by weight Portland cement, (c) 15 to 25% by weight lime, (d) aluminum The powder may contain 0.1 to 5% by weight.

The siliceous raw material includes silica and gypsum. The silica is preferable in that the silica raw material having a SiO ₂ content of 70% or more can reduce the strength of the panel after autoclave curing and contribute to the formation of a tobermorite structure having excellent humidity control during autoclave curing. In addition, the particle size of the silica is preferable, for example, having a constant particle size of 90 μm (± 9 μm) contributes to maintaining strength and producing mesopores.

In the present invention, gypsum may be used any one of anhydrous gypsum, chemical gypsum and titanium gypsum or a combination of one or more.

In the present invention, it is preferable to use quicklime for lime, and can be prepared by calcining limestone having a CaO content of 43% by weight or more and a diameter of 25 to 35 mm or more at 1100 ° C. When the quicklime satisfies the above conditions, the quicklime becomes porous and is advantageous for pore development, and has an advantage of contributing to the formation of tobermorite having excellent humidity control during autoclave curing.

In the present invention, a conventional portland cement may be used as the cement, and the use of a powder of 2800 cm ² / g or more prepared by mixing the lime and clay raw materials at an appropriate ratio promotes strength and hydration reaction. Preferred at

b. Diatomaceous earth

In the present invention, diatomaceous earth may be used seawater or freshwater diatomaceous earth. The diatomaceous earth used in the present invention may be composed of ordinary components, namely, 80 to 90% by weight of silica, 3 to 6% by weight of aluminum oxide, 1 to 3% by weight of iron oxide, and 1 to 4% by weight of calcium oxide.

In the present invention, the diatomaceous earth is excellent in the humidity control function is excellent in removing formaldehyde soluble in moisture, and since the SiO ₂ component of the diatomaceous earth makes a compact structure during panel curing, it performs a function of maintaining the strength of the ALC deodorizing panel.

In the present invention, the content of diatomaceous earth is preferably included 3 to 20 parts by weight based on 100 parts by weight of the ALC solid content composition. If the content of diatomaceous earth is less than 3 parts by weight, the increase in strength and enhancement of the harmful gas removal performance is insignificant, and if it exceeds 20 parts by weight, the pore development is poor and the harmful gas removal performance is reduced.

c. Zeolite

In the present invention, the zeolite may be any one selected from the group consisting of laumontite, erionite, chabazite, clinoptiolite, analcime, mordenite, ZSM-5, A, beta, X, Y type zeolite, and combinations thereof.

In the present invention, the zeolite improves the strength of the ALC deodorizing panel due to the solid crystal structure, and the metal catalyst materials contained in the zeolite effectively perform the function of removing NO ₂ and O ₃ .

In the present invention, the content of the zeolite is preferably contained 3 to 20 parts by weight based on 100 parts by weight of the ALC solid composition. If the content of the zeolite is less than 3 parts by weight, the increase in strength and enhancement of the harmful gas removal performance is insignificant. If the content of the zeolite is more than 20 parts by weight, the pore development is poor and the harmful gas removal performance is reduced.

d. Activated carbon

In the present invention, activated carbon may be additionally used as a raw material in addition to heavy oil ash to improve the adsorption function of the panel. The carbon source of activated carbon is either mineral or plant. At this time, the content of activated carbon may be included 10 to 30 parts by weight based on 100 parts by weight of the ALC solid composition. When the content of the activated carbon is within the above range, the strength does not decrease, and mesopores are developed, thereby adsorbing performance is improved.

The panel manufacturing method of this invention is as follows.

Manufacture of deodorizing panels

In the present invention, as the ALC panel manufacturing composition and manufacturing method, a conventional ALC composition and manufacturing method may be used. For example, the solids composition for producing ALC usable in the present invention is (a) 30 to 55% by weight siliceous raw material, (b) 25 to 40% by weight Portland cement, (c) 15 to 25% by weight lime, (d) aluminum The powder may contain 0.1 to 5% by weight.

The ALC deodorizing panel of the present invention is mixed with water and the raw material added the above-mentioned diatomaceous earth, zeolite, activated carbon, etc. to the ALC solid composition, and cured in a curing chamber of 50 ℃, relative humidity 40-60% for 3-7 hours. Thereafter, the cured panel can be prepared by autoclaving curing for 12 hours at 180 ° C, 10 kg / cm ² conditions.

Hereinafter, preferred embodiments of the present invention will be described.

Example 1

A commercial ALC suspension from SsangYong SYC was prepared, consisting of lime, siliceous raw material, foaming agent, admixture, and water. The solids composition of this suspension is shown in Table 1 below, which is analyzed to contain trace amounts of admixtures. At this time, the total content of solids is 3074g.

burr gypsum CaO cement 42 wt% 3 wt% 17 wt% 38 wt%

Next, 12 parts by weight (380 g) of diatomaceous earth, 12 parts by weight (380 g) of zeolite (A 50%, Y 50%), and 22 parts by weight (670 g) of activated carbon were added to 100 parts by weight of the suspension solids composition in the prepared suspension. After quantitative addition, a small amount of water at 80 ° C. was added to maintain the viscosity of the suspension. Subsequently, 4 g of aluminum powder was added as a foaming agent and dispersed using a vibrator for 20 seconds. The prepared suspension was poured into a mold and dried in a mixed wet drying room for 4 hours, and then the dried suspension was dried at 180 ° C. and 10 kg / cm ² . Panels were prepared by steam curing in an autoclave for 12 hours. The cured panel was then stabilized at room temperature and atmospheric pressure.

<Example 2>

12 parts by weight (380 g) of diatomaceous earth, 6 parts by weight (190 g) of zeolite (A 50%, Y 50%) and 22 parts by weight (670 g) of activated carbon were quantitatively added to 100 parts by weight of the suspension solids composition. A panel was manufactured in the same manner as in Example 1, except that it was.

<Example 3>

To the prepared suspension, 6 parts by weight (190 g) of diatomaceous earth, 12 parts by weight (380 g) of zeolite (A 50%, Y 50%), and 22 parts by weight (670 g) of activated carbon were quantified based on 100 parts by weight of the suspension solids composition. A panel was manufactured in the same manner as in Example 1, except that it was.

<Example 4>

6 parts by weight (190 g) of diatomaceous earth, 6 parts by weight (190 g) of zeolite (A 50%, Y 50%), and 22 parts by weight (670 g) of activated carbon were weighed into 100 parts by weight of the suspension solid composition. A panel was manufactured in the same manner as in Example 1, except that it was.

Comparative Example 1

ALC panel composition of SsangYong SYC was prepared in Comparative Example 1 to prepare the panel of Example. Solid content composition of the commercial ALC raw material is shown in Table 1 above. At this time, the total content of solids is 3074g.

Comparative Example 2

A panel prepared by adding 1750 g of heavy oil ash pretreated and 440 g of diatomaceous earth to a commercial ALC composition was prepared in Comparative Example 2. At this time, in the manufacturing of the panel, a solution in which heavy metals were removed and Ni, V, etc. dissolved in the pretreatment was used as mixed water. The solid composition used to prepare this panel was the same as in Comparative Example 1.

The pretreated heavy oil ash was mixed with heavy oil ash in distilled water at a weight ratio of about 1: 10, and then stirred at 600 rpm for 1 hour using an agitator to elute the metal to pretreat the heavy oil ash.

Characterization

The deodorizing performance of TVOC (toluene) and formaldehyde mixed gas of the panels prepared by Examples 1 to 4 and Comparative Examples 1 and 2 were compared. Deodorization experiments were carried out using a 66 mL deodorization panel in a 30 L chamber, in which a certain amount of mixed gas was injected, the initial concentration was measured, and then an internal fan was operated to detect the internal concentration change. chromatography and an indoor air quality analyzer. At this time, the temperature was maintained at 25 ℃, relative humidity was maintained in the 50 ~ 60% range.

FIG. 1 is a graph showing removal efficiency after 30 minutes of injecting toluene and formaldehyde mixed gas into the panels prepared according to Examples 1 to 4 and Comparative Examples 1 and 2. FIG.

Referring to FIG. 1, it can be seen that the panels of Examples 1 to 4 exhibit high removal efficiency compared to the commercial ALC panel and the panel containing heavy oil ash in the commercial ALC.

2 is a graph measuring the removal efficiency of NO ₂ . Referring to FIG. 2, it can be seen that the panels of Examples 1 to 4 exhibit high removal efficiency compared to the commercial ALC panel and the panel containing heavy oil ash in the commercial ALC. In addition, when the content of diatomaceous earth was high it was found that the removal rate for NO ₂ is increased.

3 is a graph measuring the removal efficiency of O ₃ . Referring to FIG. 3, it can be seen that the panels of Examples 1 to 4 exhibit higher removal efficiency than commercial ALC panels. In addition, Comparative Example 2, which is a panel containing heavy oil ash and diatomaceous earth in commercial ALC, showed high removal efficiency of O ₃ at Examples 1 to 4, which was caused by various metals contained in heavy oil ash and diatomaceous earth. It can be seen that ₃ is converted to the form of O ₂ .

4 is a graph measuring compressive strength. Compressive strength was measured according to KSF 2519: 2000.

Referring to FIG. 4, it can be seen that when heavy oil ash is added (Comparative Example 2) compared to a commercial ALC composition (Comparative Example 1), the removal efficiency of O ₃ is increased but the compressive strength is considerably lowered. In addition, the deterioration of the mechanical properties of ALC panels due to the use of heavy oil ash is considered to be serious as the usage of heavy oil ash increases.

However, in the case of Example 1 of the present invention was the most densely cured, the compressive strength was the best, and in Examples 3 and 2, the compressive strength was lower than that of Example 1 due to the relatively small content of diatomaceous earth and zeolite. In case of 4, the content of diatomaceous earth and zeolite was the lowest, and the compressive strength was lowest among Examples 1-4.

As a result, it can be seen that the content of diatomaceous earth and zeolite can prevent deterioration of the mechanical properties of the ALC panel.

Claims (6)

Preparation of an ALC deodorizing panel, characterized in that to produce a panel by molding and steam curing a raw material comprising 3 to 20 parts by weight of diatomaceous earth, 3 to 20 parts by weight of zeolite and 10 to 30 parts by weight of activated carbon based on 100 parts by weight of the ALC solid composition Way. delete The composition of claim 1, wherein the ALC solid content is (a) 30 to 55% by weight of siliceous raw material, (b) 25 to 40% by weight of Portland cement, (c) 15 to 25% by weight of lime, and (d) 0.1 to 20% by weight of aluminum powder. A method for producing an ALC deodorizing panel, characterized in that it comprises 5% by weight. The method of claim 1, wherein the zeolite is laumontite, erionite, chabazite, clinoptiolite, analcime, mordenite, ZSM-5, A, beta, X, Y type zeolite and any one selected from the group consisting of a combination thereof Process for producing ALC deodorization panel. An ALC deodorization panel comprising 3 to 20 parts by weight of diatomaceous earth, 3 to 20 parts by weight of zeolite and 10 to 30 parts by weight of activated carbon based on 100 parts by weight of the ALC solid composition. The method of claim 5, wherein the zeolite is laumontite, erionite, chabazite, clinoptiolite, analcime, mordenite, ZSM-5, A, beta, X, Y type zeolite and any one selected from the group consisting of ALC Deodorization Panel.

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