WO2014107032A1 - Composition for porous humidity control board reutilizing water purification sludge, and method for manufacturing porous humidity control board using same - Google Patents

Composition for porous humidity control board reutilizing water purification sludge, and method for manufacturing porous humidity control board using same Download PDF

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WO2014107032A1
WO2014107032A1 PCT/KR2014/000017 KR2014000017W WO2014107032A1 WO 2014107032 A1 WO2014107032 A1 WO 2014107032A1 KR 2014000017 W KR2014000017 W KR 2014000017W WO 2014107032 A1 WO2014107032 A1 WO 2014107032A1
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weight
powder
parts
composition
sludge
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PCT/KR2014/000017
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French (fr)
Korean (ko)
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김유진
이성민
김형태
박용철
강신재
이규현
손용경
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주식회사 넥스트윅
한국세라믹기술원
서울특별시
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Publication of WO2014107032A1 publication Critical patent/WO2014107032A1/en

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    • C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
    • C04B38/08—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by adding porous substances
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    • C04B5/00—Treatment of  metallurgical  slag ; Artificial stone from molten  metallurgical  slag 
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    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00—Treatment of sludge; Devices therefor
    • C02F11/008—Sludge treatment by fixation or solidification
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    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
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Definitions

  • the present invention relates to a composition for a porous humidity board and a method of manufacturing a porous humidity board using the same, and more specifically, it is possible to recycle resources because it recycles waste sludge generated from the treatment of water purification plant to make tap water, It is a flame retardant that does not burn well and is made of inorganic raw materials, low cost of raw materials and low production cost enable mass production. It is made of inorganic materials that are harmless to the human body, and has excellent characteristics of absorbing and releasing harmful substances generated. It relates to a composition for a porous humidity board and a method of manufacturing a porous humidity board using the same.
  • High humidity is the growth of allergic diseases such as asthma and atopic dermatitis due to harmful fine powder with the growth of mold and mites.
  • Low humidity may cause malfunction of precision instruments due to virus growth such as cold and measurement of static electricity. Therefore, dehumidifiers or humidifiers are used to maintain proper humidity. Occurs.
  • the humidity board is a material that has the function of condensing and absorbing water vapor when the environmental humidity is increased by the capillary tube on the surface of the material, and evaporating the condensate water when the environmental humidity is low.
  • it refers to materials that maintain a certain range of humidity.
  • mesoporous materials having a pore size in the range of 35 nm and a pore volume of 0.8 cc / g or more should be used.
  • Humidity boards first developed in Japan, use surfactants to induce the desired pore structure, resulting in high manufacturing costs and difficulty in mass production, making it difficult to actually produce.
  • the problem to be solved by the present invention is recycling the waste water sludge which is generated during the treatment process of tap water to make the tap water is recycled resources, it is made of inorganic raw materials as a flame retardant that does not burn well, and the raw material is cheap It is possible to provide mass production with low manufacturing cost, and it is made of inorganic material that is harmless to human body, and has excellent characteristics of absorbing and releasing harmful substances generated, and providing a method for manufacturing porous humidity board using the same. have.
  • the purified water sludge powder formed during the treatment of the water treatment plant to make the tap water is heat-treated at 500 ⁇ 700 °C, 70 to 130 parts by weight of waste glass powder, the purified water sludge with respect to 100 parts by weight of the purified sludge powder It provides a composition for a porous humidity board comprising 10 to 40 parts by weight of at least one material selected from silica powder and zeolite powder and 70 to 130 parts by weight of clay based on 100 parts by weight of the purified sludge powder.
  • composition for the porous humidity board may further include 10 to 40 parts by weight of TiO 2 based on 100 parts by weight of the purified sludge powder.
  • composition for the porous humidity board may further include 0.1 to 40 parts by weight of one or more materials selected from diatomaceous earth, gypsum, allophen, imogolite, slaked lime, dolomite and charcoal based on 100 parts by weight of the purified sludge powder. .
  • the clay may be bentonite.
  • the waste glass powder is preferably made of waste glass powder pulverized smaller than 50 ⁇ 800 mesh.
  • At least one material selected from the silica powder and the zeolite powder is preferably made of a powder having an average particle diameter of 1 ⁇ 80 ⁇ m.
  • the purified sludge powder is composed of 40 to 60% by weight of SiO 2 , 25 to 45% by weight of Al 2 O 3 , 2 to 10% by weight of Fe 2 O 3 , CaO 0.1 to 3%, and MgO 0.1 to 5% by weight.
  • It may be a material comprising 0.001 to 1% by weight, SrO 0.001 to 1% by weight, Li 2 O 0.001 to 1% by weight, BaO 0.001 to 1% by weight and PbO 0.001 to 1% by weight.
  • the present invention (a) preparing the purified water sludge generated in the treatment process of the water purification plant to make the tap water, (b) heat treatment the purified sludge at 500 ⁇ 700 °C to form a purified sludge powder, (c) 10 to 40 one or more substances selected from silica powder and zeolite powder based on 70 to 130 parts by weight of the waste glass powder and 100 parts by weight of the purified water sludge powder and 100 parts by weight of the purified water sludge powder Part by weight, mixing 70 to 130 parts by weight of clay with respect to 100 parts by weight of the purified sludge powder to form a composition for a porous humidity board, (d) forming the composition for the porous humidity board and (e) molded It includes the step of firing the result, the firing provides a method of manufacturing a porous humidity board, characterized in that made at a temperature of 800 ⁇ 1000 °C.
  • step (c) 10 to 40 parts by weight of TiO 2 may be further mixed with respect to 100 parts by weight of the purified sludge powder.
  • step (c) 0.1 to 40 parts by weight of one or more materials selected from diatomaceous earth, gypsum, allophen, imogolite, slaked lime, dolomite and charcoal may be further mixed with respect to 100 parts by weight of the purified sludge powder.
  • the method may further include the step of applying a glaze to the surface of the molded product, and the surface area of the molded product is preferably 30 to 95%.
  • the clay may be bentonite.
  • waste glass powder it is preferable to use waste glass powder pulverized smaller than 50 to 800 mesh.
  • a powder having an average particle diameter of 1 to 80 ⁇ m as the at least one material selected from the silica powder and the zeolite powder.
  • the purified sludge powder is composed of 40 to 60% by weight of SiO 2 , 25 to 45% by weight of Al 2 O 3 , 2 to 10% by weight of Fe 2 O 3 , CaO 0.1 to 3%, and MgO 0.1 to 5% by weight.
  • Humidity board of the present invention exhibits the humidity of absorbing and releasing moisture, and can absorb harmful substances such as volatile organic compounds (VOC), formaldehyde and the like.
  • VOC volatile organic compounds
  • the humidity board of the present invention recycles waste sludge, which is a waste sludge generated during the treatment of water treatment plant to make tap water, so that the resources can be recycled, made of inorganic raw materials as a flame retardant that does not burn well, and the raw material is cheap Low manufacturing cost enables mass production, and is made of inorganic materials that are harmless to the human body, and is excellent in absorbing and releasing harmful substances generated.
  • Humidity board of the present invention can be mainly used as interior materials, such as exterior materials, bathrooms or finishing materials with a coloring or design.
  • 1 is a graph showing a hygroscopic hysteresis curve.
  • FIG. 2 is a view schematically showing a process of making tap water.
  • 3 is a photograph showing the foreground of Yeongdeungpo water purification plant.
  • 5 is a photograph showing that the belt is formed by using a belt press to remove moisture.
  • FIG. 7 is a photograph showing the side of the humidity board specimen prepared when the constant temperature and humidity experiment according to Experimental Example 1 was sealed using tape according to the standard.
  • FIGS. 8A and 8B are photographs of the front surface of the humidity board specimen prepared according to Experimental Example 1 with a scanning electron microscope (SEM).
  • 9a and 9b are photographs of the side surface of the humidity board specimen prepared according to Experimental Example 1 with a scanning electron microscope (SEM).
  • the present invention provides a humidity control board that absorbs and releases moisture and absorbs harmful substances such as volatile organic compounds (VOC) and formaldehyde.
  • VOC volatile organic compounds
  • formaldehyde harmful substances
  • the present invention is intended to develop an eco-friendly material containing a large amount of purified sludge as a main raw material having a problem in disposal by dumping a large amount of ocean dumping or waste.
  • the purified sludge is used to include sludge generated in the treatment process of a water treatment plant for making tap water.
  • Humidity boards first developed in Japan, use surfactants to induce the desired pore structure, resulting in high manufacturing costs and difficulty in mass production, making it difficult to actually produce.
  • the purified water sludge as the main raw material in the manufacturing of the humidity board, it is possible to replace the expensive humidity board by lowering the manufacturing cost.
  • Humidity board of the present invention is a flame retardant that does not burn well, made of inorganic raw materials, the raw material is cheap and low production cost is possible to mass production, made of inorganic materials harmless to the human body, absorb the harmful substances generated And excellent properties of releasing.
  • Humidity board of the present invention can be mainly used as interior materials, such as exterior materials, bathrooms or finishing materials with a coloring or design.
  • Porous humidity board is made of ceramic material is the most competitive, the porous humidity board of the present invention is a product by adding a new functionality to the existing interior and exterior tiles that are losing the competitiveness of imported and large replacement effect of Chinese and European products It can contribute to the creation of new markets and the development of related industries.
  • High humidity is the growth of allergic diseases such as asthma and atopic dermatitis due to harmful fine powder with the growth of mold and mites. If the humidity is low, malfunction of the precision equipment may occur due to the growth of viruses such as cold and the measurement of static electricity, and therefore, it is necessary to maintain proper humidity.
  • the humidity board of the present invention has a humidity control function.
  • Humidity control means the function of controlling humidity, and it absorbs moisture when the humidity is high and emits moisture when the humidity is low.
  • Humidity board of the present invention has a function of condensing and absorbing water vapor when the environmental humidity is increased by the capillary tube present on the surface of the material, and evaporating the condensate water when the environmental humidity is low, the change of the external environment in the building or in a sealed living space It is a functional material that can maintain humidity in a certain range.
  • 'adsorption' represents moisture absorption
  • 'desorption' represents moisture dampening (evaporation of moisture).
  • the moisture absorption function shown in FIG. 1 occurs even at low humidity as the pore diameter is small, and the pore at about 10 nm causes condensation at 90% relative humidity (RH), and the evaporation (moisture) of moisture also decreases as the pore diameter is smaller.
  • RH relative humidity
  • evaporation at about 10 nm pores occurs at 80% relative humidity (RH), lower than condensation.
  • RH relative humidity
  • This phenomenon is explained by the hygroscopic hysteresis curve, where the humidity of the hygroscopic basis depends on the pore size and the amount increases with the porosity. Therefore, the larger the pore size is to change around the high humidity, it is generally known that the absorption and moisture absorption occurs in the pore range of about 3 ⁇ 7.5nm when the average humidity is 40 ⁇ 70%.
  • the moisture absorption and moisture absorption characteristics are divided into short-term and long-term types according to the expression time.
  • the short-term type absorbs and damps about 80% or more within 12 hours
  • the long-term type gradually absorbs and damps about 80% or more over several days.
  • Wood-based materials, etc. belong to this. In addition, depending on the material, it can have a long and short composite properties.
  • the present invention is used as the main raw material of the porous humidifying board by recycling the purified sludge as a flotation sediment.
  • FIG. 2 is a view schematically showing a treatment process of a water treatment plant for making tap water.
  • 3 is a photograph showing the foreground of Yeongdeungpo water purification plant.
  • Figure 4 is a photograph showing a sludge thickening tank,
  • Figure 5 is a photograph showing the removal of moisture using a belt press to make a cake (Cake) form.
  • the purified sludge is preferably used after heat treatment at a temperature of 500 to 700 ° C, preferably 600 ° C.
  • the organic matter contained in the purified sludge is burned and removed, thereby obtaining purified sludge powder.
  • the purified sludge powder is composed of 40 to 60% by weight of SiO 2 , 25 to 45% by weight of Al 2 O 3 , 2 to 10% by weight of Fe 2 O 3 , CaO 0.1 to 3%, MgO 0.1 to 5%, 0.1 to 6% K 2 O, 0.01 to 2% Na 2 O, 0.01 to 2% TiO 2, 0.01 to 3% P 2 O 5 , 0.01 to 2% MnO, 0.001 to 1% ZrO 2 It may be a material comprising 0.001 to 1% by weight of Cr 2 O 3, 0.001 to 1% by weight of SrO, 0.001 to 1% by weight of Li 2 O, 0.001 to 1% by weight of BaO, and 0.001 to 1% by weight of PbO.
  • Table 1 below shows the chemical composition after heat treatment of purified water sludge generated at the roasting water treatment plant at 600 °C for 10 minutes.
  • 1 is a photograph showing the purified sludge powder obtained by heat treatment at 600 °C for 10 minutes.
  • Porous humidifying board composition according to a preferred embodiment of the present invention, the purified sludge generated during the treatment process of the water purification plant to make the tap water, the wastewater sludge powder formed by heat treatment at 500 ⁇ 700 °C, the waste water sludge powder with respect to 100 parts by weight 70 to 130 parts by weight of glass powder, 10 to 40 parts by weight of one or more substances selected from silica powder and zeolite powder, and 70 to 130 parts by weight of clay based on 100 parts by weight of the purified sludge powder based on 100 parts by weight of the purified sludge powder do.
  • the waste glass powder is a sintering aid, and when less waste glass powder is added, the waste glass powder is not easily baked and the strength is weak.
  • the waste glass powder is preferably made of waste glass powder pulverized smaller than 50 ⁇ 800 mesh.
  • At least one material selected from the silica powder and the zeolite powder is preferably made of a powder having an average particle diameter of 1 ⁇ 80 ⁇ m.
  • Silica powder may act as a moisture-humidifying agent as a porous material.
  • Zeolite can also act as a moisturizing agent.
  • the clay may be bentonite.
  • Bentonite is a plastic raw material, which facilitates molding, and if the content of bentonite is too small, molding may not be performed well, and in many cases, it is expensive.
  • the composition for the porous humidity board may further include 10 to 40 parts by weight of TiO 2 based on 100 parts by weight of the purified sludge powder. TiO 2 may serve to make the color of the porous humidity board white.
  • composition for the porous humidity board may further include 0.1 to 40 parts by weight of one or more materials selected from diatomaceous earth, gypsum, allophen, imogolite, slaked lime, dolomite and charcoal based on 100 parts by weight of the purified sludge powder.
  • At least one material selected from diatomaceous earth, gypsum, allophen, imogolite, slaked lime, dolomite, and charcoal may serve as a moisturizing agent.
  • a method of manufacturing a porous humidifying board capable of expressing moisture absorption and moisture absorption characteristics through nanopores after dehydration and heat treatment of purified sludge, which is a flotation sediment having nanoparticles, and using a suitable mixture at low temperature may be described.
  • the purified sludge powder is composed of 40 to 60 wt% of SiO 2 , 25 to 45 wt% of Al 2 O 3 , 2 to 10 wt% of Fe 2 O 3 , 0.1 to 3 wt% of CaO, 0.1 to 5 wt% of MgO, K 2 O 0.1-6%, Na 2 O 0.01-2%, TiO 2 0.01-2%, P 2 O 5 0.01-3%, MnO 0.01-2%, ZrO 2 0.001--1% It may be a material comprising 0.001 to 1% by weight of Cr 2 O 3, 0.001 to 1% by weight of SrO, 0.001 to 1% by weight of Li 2 O, 0.001 to 1% by weight of BaO, and 0.001 to 1% by weight of
  • TiO 2 10 to 40 parts by weight of TiO 2 may be further mixed with respect to 100 parts by weight of the purified sludge powder. TiO 2 may serve to make the color of the porous humidity board white.
  • At least one material selected from diatomaceous earth, gypsum, allophen, imogolite, slaked lime, dolomite and charcoal may be further mixed with respect to 100 parts by weight of the purified sludge powder.
  • At least one material selected from diatomaceous earth, gypsum, allophen, imogolite, slaked lime, dolomite, and charcoal may serve as a moisturizing agent.
  • the waste glass powder it is preferable to use the waste glass powder pulverized smaller than 50 to 800 mesh in consideration of porosity characteristics of the porous humidity board.
  • the waste glass powder is a sintering aid, and when less waste glass powder is added, the waste glass powder is not easily baked and the strength is weak.
  • the at least one material selected from the silica powder and the zeolite powder may be a powder having an average particle diameter of 1 to 80 ⁇ m, preferably 20 to 50 ⁇ m, in consideration of porosity characteristics of the porous humidity board.
  • Silica powder may act as a moisture-humidifying agent as a porous material.
  • Zeolite can also act as a moisturizing agent.
  • the clay may be bentonite.
  • Bentonite is a plastic raw material, which facilitates molding, and if the content of bentonite is too small, molding may not be performed well, and in many cases, it is expensive.
  • the mixing can be done in a variety of ways, here an example of using a wet ball milling process will be described.
  • the starting material is charged to a ball milling machine and wet mixed with a solvent such as distilled water.
  • the ball mill is rotated at a constant speed to grind the starting materials while mixing them mechanically.
  • the ball used in the ball milling is preferably to use a ball made of a ceramic material, such as alumina in order to suppress the generation of impurities, the balls may be all the same size or may be used with a ball having two or more sizes together. .
  • the size of the ball can be set in the range of about 1mm ⁇ 50mm
  • the rotation speed of the ball mill can be set in the range of about 50 ⁇ 500rpm.
  • Ball milling is preferably carried out for 1 to 48 hours. Ball milling causes the starting material to be mixed and ground into finely sized particles and to have a uniform particle size distribution. Through the wet mixing process as described above it is finely divided to form a slurry (slurry) state, such a slurry material can be used as a composition for a porous humidity board.
  • the molding can be done in a variety of ways.
  • Glaze can be applied to the molded product by using silk screen or spraying method.
  • glazes there is no particular limitation on the glaze that can be used.
  • examples of glazes that may be used include grinding a borosilicate frit having a melting point lower than the firing temperature to less than a predetermined size (eg 200 mesh) and adding a predetermined amount (eg 5% by weight) of a substance such as kaolin to water.
  • a predetermined size eg 200 mesh
  • a predetermined amount eg 5% by weight
  • the oil surface of the glaze is 30 to 95% of the surface area of the molded product. When the surface area exceeds 95%, the humidity control is limited. When the surface area of the glaze is less than 30%, the surface of the glaze is in use. The likelihood of accumulation of contaminants increases.
  • the molded composition for the porous humidity board is charged to a furnace such as an electric furnace and subjected to a firing process.
  • the firing process is preferably performed for 1 minute to 48 hours at a relatively low temperature of about 800 ⁇ 1000 °C. It is desirable to keep the pressure inside the furnace constant during firing.
  • the firing is preferably carried out at a temperature in the range of 800 ⁇ 1000 °C. If the firing temperature is less than 800 °C composition of the porous humidity board is incompletely fired may not be good characteristics of the porous humidity board, when the temperature exceeds 1000 °C may be uneconomical due to high energy consumption.
  • the heating temperature it is preferable to increase the heating temperature at a temperature increase rate of 1 to 50 ° C./min. If the temperature rising rate is too slow, productivity may take a long time, and if the temperature rising rate is too fast, thermal stress may be applied due to a rapid temperature rise. Since it is possible to raise the temperature at a temperature rising rate in the above range, it is preferable.
  • the firing is preferably maintained for 1 minute to 48 hours at the firing temperature. If the firing time is too long, energy consumption is high, so it is not economical and it is difficult to expect further firing effects, and if the firing time is small, incomplete firing may be achieved.
  • the firing is preferably carried out in an oxidizing atmosphere (for example, air or oxygen (O 2 ) atmosphere).
  • an oxidizing atmosphere for example, air or oxygen (O 2 ) atmosphere.
  • the furnace temperature is lowered to unload the porous humidity board.
  • the furnace cooling may be allowed to cool down in a natural state by turning off the furnace power source, or to set a temperature drop rate (eg, 10 ° C./min) arbitrarily. It is desirable to keep the pressure inside the furnace constant while the furnace temperature is lowered.
  • the purified sludge (SL) was heat treated at 600 ° C. for 10 minutes.
  • the purified sludge powder formed by heat treatment at 600 ° C. is the same as that shown in Table 1 and FIG. 6.
  • the composition for the porous humidity board was pressed in a load of 400Kg / cm 2 in accordance with the humidity board specifications, and manufactured in the form of a humidity board specimen.
  • the sampled product was fired at 850 ° C. for 10 minutes using a tunnel kiln to obtain a humidity board specimen.
  • the prepared humidity board specimens were measured for porosity, and observed using a thermo-hygrostat when measuring the absorption rate / release rate.
  • thermo-hygrostat was used as a method for absorbance / release rate of the prepared humidity board specimens.
  • the absorption rate and the release rate can be measured by changing the humidity conditions at the same temperature conditions.
  • the side of the humidity board specimen is sealed using a tape as shown in FIG. 7, and after preparing the upper surface to be visible, the sample board is placed in a thermo-hygrostat and set to 25% humidity at a temperature of 25. The weight was taken out.
  • the humidity was raised to 90% at 25 ° C., and after 12 hours, the weight was measured, and the amount of water absorbed in the cross section was calculated.
  • thermo-hygrostat This was put back into the thermo-hygrostat and then set to 25% humidity at 25 ° C. and then taken out after 12 hours to measure the weight and calculate the moisture-proof amount.
  • the amount of water absorption / moisture absorption was calculated in terms of the unit area of m 2.
  • Table 2 is a table showing the absorption / release rate of the humidity board specimen prepared according to Experimental Example 1.
  • 'm 0 ' is the weight measured by taking out the sample after 12 hours after putting the humidity board specimen into the thermo-hygrostat and setting it to 25% humidity at a temperature of 25 ° C
  • 'm 1 ' is 90 ° at 25 ° C. It is the weight measured after increasing the humidity to% and taking it out after 12 hours
  • 'm 2 ' is set to 90% humidity at 25 ° C and taken out after 12 hours to measure the weight, and then put it in the constant temperature and humidity chamber again at 25 ° C to 25% humidity. The weight was taken out after 12 hours of setting, and 'A' means the area of the humidity board specimen.
  • Table 2 shows the humidity of the humidity board specimen prepared according to Experimental Example 1 for 12 hours at a temperature of 25 °C, 25% humidity for 12 hours and then reacted for 12 hours at a temperature of 25 °C, 90% humidity to measure the absorption rate and temperature 25 °C, The reaction rate was measured by reacting at 25% humidity for 12 hours.
  • FIG 8a and 8b are photographs of the front surface of the humidity board specimen prepared according to Experimental Example 1 by Scanning Electron Microscope (SEM),
  • Figure 9a and 9b is a humidity board prepared according to Experimental Example 1 The side surface of the specimen was observed with a scanning electron microscope (SEM).
  • the porosity of the humidity board specimen prepared according to Experimental Example 1 was measured.
  • the average pore diameter of the humidity board specimen prepared according to Experimental Example 1 was 742 mm, the bulk density was 1.0237 g / ml, the apparent density was 1.9252 g / ml, and the porosity. porosity was 46.8259%.

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Abstract

The present invention relates to a composition for a porous humidity control board, comprising: water purification sludge powder obtained by heat-treating, at the temperature of 500 to 700̊C, water purification sludge generated in the treatment process, which is performed in a water purification facility that produces tap water; 70 to 130 parts by weight of waste glass powder with respect to 100 parts by weight of the water purification sludge powder; 10 to 40 parts by weight of one or more substances selected from silica powder and zeolite powder with respect to 100 parts by weight of the water purification sludge powder; and 70 to 130 parts by weight of clay with respect to 100 parts by weight of the water purification sludge powder. The present invention also relates to a method for manufacturing the porous humidity control board using said composition. The present invention reutilizes the water purification sludge that is waste sludge generated in the treatment process, which is performed in a water purification facility that produces tap water, thus enabling reutilization of resources. The composition of the present invention is made of a flame resistant inorganic material that does not easily burn by fire, wherein the material is inexpensive and manufactured at a low cost so as to enable mass production, and the composition is made of an inorganic material harmless to humans, and is excellent in absorbing and discharging generated harmful substances.

Description

정수 슬러지를 재활용한 다공성 조습보드용 조성물 및 이를 이용한 다공성 조습보드의 제조방법Composition for porous humidifying board recycled purified sludge and method of manufacturing porous humidifying board using same
본 발명은 다공성 조습보드용 조성물 및 이를 이용한 다공성 조습보드의 제조방법에 관한 것으로, 더욱 상세하게는 수돗물을 만드는 정수장의 처리 과정에서 발생하는 폐 슬러지인 정수 슬러지를 재활용하므로 자원 재활용이 가능하며, 불에 잘 타지 않는 난연성으로서 무기질계 원료로 이루어지고, 원료가 저렴하여 제조비용이 낮아 대량생산이 가능하며, 인체에 무해한 무기질계 재료로 이루어지고, 발생된 유해물질을 흡수 및 방출하는 특성이 매우 우수한 다공성 조습보드용 조성물 및 이를 이용한 다공성 조습보드의 제조방법에 관한 것이다.The present invention relates to a composition for a porous humidity board and a method of manufacturing a porous humidity board using the same, and more specifically, it is possible to recycle resources because it recycles waste sludge generated from the treatment of water purification plant to make tap water, It is a flame retardant that does not burn well and is made of inorganic raw materials, low cost of raw materials and low production cost enable mass production. It is made of inorganic materials that are harmless to the human body, and has excellent characteristics of absorbing and releasing harmful substances generated. It relates to a composition for a porous humidity board and a method of manufacturing a porous humidity board using the same.
근래에 들어서 웰빙 문화의 확산으로 실내공기의 질을 개선하는 요구가 증가함에 따라 내장재에 대한 소비자의 요구가 매우 다양해지고 있다. In recent years, as the demand for improving the quality of indoor air is increased due to the spread of well-being culture, consumer demand for interior materials is very diverse.
높은 습도는 곰팡이나 진드기의 왕성한 번식에 따라 유해의 미분말에 의해 천식이나 아토피성 피부염과 같은 알레르기 질환이 증가하고 있다. 습도가 낮으면 감기 등의 바이러스의 증식, 정전기의 측적으로 인한 정밀기기의 오동작이 발생할 수 있고, 따라서 적당한 습도를 유지하기 위해 제습기나 가습기가 사용되고 있는데, 이 경우 에너지 소비가 크고 장시간 사용 시 문제가 발생한다.High humidity is the growth of allergic diseases such as asthma and atopic dermatitis due to harmful fine powder with the growth of mold and mites. Low humidity may cause malfunction of precision instruments due to virus growth such as cold and measurement of static electricity. Therefore, dehumidifiers or humidifiers are used to maintain proper humidity. Occurs.
최근에는 수분의 흡방출이 가능하여 습도 조절이 가능한 조습보드에 대한 연구가 진행되고 있다. Recently, research has been conducted on a humidity control board capable of controlling moisture absorption and release.
조습보드는 재료의 표면에 존재하는 모세관에 의해 환경습도가 높아지면 수증기를 응축 흡습하고, 환경습도가 낮아지면 응축수를 증발하는 기능을 갖는 재료로, 건물 내부나 밀페된 생활공간에서 외부 환경변화에 대응하여 일정 범위의 습도를 유지시켜 주는 재료를 말한다. 이런 기능을 갖기 위해서는 세공크기 35 nm 범위, 세공 용적 0.8cc/g 이상인 메조포러스 물질(mesoporous materials) 이어야 한다.The humidity board is a material that has the function of condensing and absorbing water vapor when the environmental humidity is increased by the capillary tube on the surface of the material, and evaporating the condensate water when the environmental humidity is low. Correspondingly, it refers to materials that maintain a certain range of humidity. In order to have this function, mesoporous materials having a pore size in the range of 35 nm and a pore volume of 0.8 cc / g or more should be used.
일본에서 처음 개발된 조습보드는 원하는 기공구조의 유도를 위해 계면활성제를 사용하기 때문에 제조비용이 높고 대량생산에 어려움이 있어 실제 생산에 어려움이 있다. Humidity boards, first developed in Japan, use surfactants to induce the desired pore structure, resulting in high manufacturing costs and difficulty in mass production, making it difficult to actually produce.
불에 타지 않는 난연성으로서 무기질계 원료로 이루어지고, 원료가 저렴하여 제조비용이 낮아 대량생산이 가능하며, 무해한 재료와 발생된 유해물질을 흡수하는 재질 그리고 기능성이 부가된 재질로 이루어진 조습보드에 대한 연구가 필요하다. It is a flame retardant which is not burned and is made of inorganic raw materials, and the raw material is cheap, so the manufacturing cost is low, so mass production is possible, and it is made of material that absorbs harmless materials and harmful substances generated and materials added with functionality. Need research
본 발명이 해결하고자 하는 과제는 수돗물을 만드는 정수장의 처리 과정에서 발생하는 폐 슬러지인 정수 슬러지를 재활용하므로 자원 재활용이 가능하며, 불에 잘 타지 않는 난연성으로서 무기질계 원료로 이루어지고, 원료가 저렴하여 제조비용이 낮아 대량생산이 가능하며, 인체에 무해한 무기질계 재료로 이루어지고, 발생된 유해물질을 흡수 및 방출하는 특성이 매우 우수한 다공성 조습보드용 조성물 및 이를 이용한 다공성 조습보드의 제조방법을 제공함에 있다. The problem to be solved by the present invention is recycling the waste water sludge which is generated during the treatment process of tap water to make the tap water is recycled resources, it is made of inorganic raw materials as a flame retardant that does not burn well, and the raw material is cheap It is possible to provide mass production with low manufacturing cost, and it is made of inorganic material that is harmless to human body, and has excellent characteristics of absorbing and releasing harmful substances generated, and providing a method for manufacturing porous humidity board using the same. have.
본 발명은, 수돗물을 만드는 정수장의 처리 과정에서 발생하는 정수 슬러지가 500~700℃에서 열처리되어 형성된 정수 슬러지 분말, 상기 정수 슬러지 분말 100중량부에 대하여 폐유리 분말 70~130중량부, 상기 정수 슬러지 분말 100중량부에 대하여 실리카 분말 및 제올라이트 분말 중에서 선택된 1종 이상의 물질 10~40중량부 및 상기 정수 슬러지 분말 100중량부에 대하여 점토 70~130중량부를 포함하는 다공성 조습보드용 조성물을 제공한다.The present invention, the purified water sludge powder formed during the treatment of the water treatment plant to make the tap water is heat-treated at 500 ~ 700 ℃, 70 to 130 parts by weight of waste glass powder, the purified water sludge with respect to 100 parts by weight of the purified sludge powder It provides a composition for a porous humidity board comprising 10 to 40 parts by weight of at least one material selected from silica powder and zeolite powder and 70 to 130 parts by weight of clay based on 100 parts by weight of the purified sludge powder.
상기 다공성 조습보드용 조성물은 상기 정수 슬러지 분말 100중량부에 대하여 TiO2 10~40중량부를 더 포함할 수 있다.The composition for the porous humidity board may further include 10 to 40 parts by weight of TiO 2 based on 100 parts by weight of the purified sludge powder.
또한, 상기 다공성 조습보드용 조성물은 상기 정수 슬러지 분말 100중량부에 대하여 규조토, 석고, 알로펜, 이모고라이트, 소석회, 돌로마이트 및 숯 중에서 선택된 1종 이상의 물질 0.1~40중량부를 더 포함할 수 있다.In addition, the composition for the porous humidity board may further include 0.1 to 40 parts by weight of one or more materials selected from diatomaceous earth, gypsum, allophen, imogolite, slaked lime, dolomite and charcoal based on 100 parts by weight of the purified sludge powder. .
상기 점토는 벤토나이트일 수 있다.The clay may be bentonite.
상기 폐유리 분말은 50~800메쉬 보다 작게 분쇄된 폐유리 분말로 이루어지는 것이 바람직하다.The waste glass powder is preferably made of waste glass powder pulverized smaller than 50 ~ 800 mesh.
상기 실리카 분말 및 제올라이트 분말 중에서 선택된 1종 이상의 물질은 1~80㎛의 평균 입경을 갖는 분말로 이루어지는 것이 바람직하다.At least one material selected from the silica powder and the zeolite powder is preferably made of a powder having an average particle diameter of 1 ~ 80㎛.
상기 정수 슬러지 분말은 화학 조성 성분으로 SiO2 40~60중량%, Al2O3 25~45중량%, Fe2O3 2~10중량%, CaO 0.1~3중량%, MgO 0.1~5중량%, K2O 0.1~6중량%, Na2O 0.01~2중량%, TiO2 0.01~2중량%, P2O5 0.01~3중량%, MnO 0.01~2중량%, ZrO2 0.001~1중량%, Cr2O3 0.001~1중량%, SrO 0.001~1중량%, Li2O 0.001~1중량%, BaO 0.001~1중량% 및 PbO 0.001~1중량%를 포함하는 물질일 수 있다.The purified sludge powder is composed of 40 to 60% by weight of SiO 2 , 25 to 45% by weight of Al 2 O 3 , 2 to 10% by weight of Fe 2 O 3 , CaO 0.1 to 3%, and MgO 0.1 to 5% by weight. , K 2 O 0.1-6%, Na 2 O 0.01-2%, TiO 2 0.01-2%, P 2 O 5 0.01-3%, MnO 0.01-2%, ZrO 2 0.001--1% %, Cr 2 O 3 It may be a material comprising 0.001 to 1% by weight, SrO 0.001 to 1% by weight, Li 2 O 0.001 to 1% by weight, BaO 0.001 to 1% by weight and PbO 0.001 to 1% by weight.
또한, 본 발명은, (a) 수돗물을 만드는 정수장의 처리 과정에서 발생하는 정수 슬러지를 준비하는 단계와, (b) 상기 정수 슬러지를 500~700℃에서 열처리하여 정수 슬러지 분말을 형성하는 단계와, (c) 상기 정수 슬러지 분말, 상기 정수 슬러지 분말 100중량부에 대하여 상기 폐유리 분말 70~130중량부, 상기 정수 슬러지 분말 100중량부에 대하여 실리카 분말 및 제올라이트 분말 중에서 선택된 1종 이상의 물질 10~40중량부, 상기 정수 슬러지 분말 100중량부에 대하여 점토 70~130중량부를 혼합하여 다공성 조습보드용 조성물을 형성하는 단계와, (d) 상기 다공성 조습보드용 조성물을 성형하는 단계 및 (e) 성형된 결과물을 소성하는 단계를 포함하며, 상기 소성은 800~1000℃의 온도에서 이루어지는 것을 특징으로 하는 다공성 조습보드의 제조방법을 제공한다.In addition, the present invention, (a) preparing the purified water sludge generated in the treatment process of the water purification plant to make the tap water, (b) heat treatment the purified sludge at 500 ~ 700 ℃ to form a purified sludge powder, (c) 10 to 40 one or more substances selected from silica powder and zeolite powder based on 70 to 130 parts by weight of the waste glass powder and 100 parts by weight of the purified water sludge powder and 100 parts by weight of the purified water sludge powder Part by weight, mixing 70 to 130 parts by weight of clay with respect to 100 parts by weight of the purified sludge powder to form a composition for a porous humidity board, (d) forming the composition for the porous humidity board and (e) molded It includes the step of firing the result, the firing provides a method of manufacturing a porous humidity board, characterized in that made at a temperature of 800 ~ 1000 ℃.
상기 (c) 단계에서, 상기 정수 슬러지 분말 100중량부에 대하여 TiO2 10~40중량부를 더 혼합할 수 있다.In the step (c), 10 to 40 parts by weight of TiO 2 may be further mixed with respect to 100 parts by weight of the purified sludge powder.
상기 (c) 단계에서, 상기 정수 슬러지 분말 100중량부에 대하여 규조토, 석고, 알로펜, 이모고라이트, 소석회, 돌로마이트 및 숯 중에서 선택된 1종 이상의 물질 0.1~40중량부를 더 혼합할 수 있다.In the step (c), 0.1 to 40 parts by weight of one or more materials selected from diatomaceous earth, gypsum, allophen, imogolite, slaked lime, dolomite and charcoal may be further mixed with respect to 100 parts by weight of the purified sludge powder.
상기 (d) 단계 후 상기 (e) 단계 전에, 성형된 결과물의 표면에 유약을 시유하는 단계를 더 포함할 수 있으며, 성형된 결과물에 대한 시유표면적이 30~95%인 것이 바람직하다.After step (d) and before step (e), the method may further include the step of applying a glaze to the surface of the molded product, and the surface area of the molded product is preferably 30 to 95%.
상기 점토는 벤토나이트일 수 있다.The clay may be bentonite.
상기 폐유리 분말은 50~800메쉬 보다 작게 분쇄된 폐유리 분말을 사용하는 것이 바람직하다.As the waste glass powder, it is preferable to use waste glass powder pulverized smaller than 50 to 800 mesh.
상기 실리카 분말 및 제올라이트 분말 중에서 선택된 1종 이상의 물질은 1~80㎛의 평균 입경을 갖는 분말을 사용하는 것이 바람직하다.It is preferable to use a powder having an average particle diameter of 1 to 80 μm as the at least one material selected from the silica powder and the zeolite powder.
상기 정수 슬러지 분말은 화학 조성 성분으로 SiO2 40~60중량%, Al2O3 25~45중량%, Fe2O3 2~10중량%, CaO 0.1~3중량%, MgO 0.1~5중량%, K2O 0.1~6중량%, Na2O 0.01~2중량%, TiO2 0.01~2중량%, P2O5 0.01~3중량%, MnO 0.01~2중량%, ZrO2 0.001~1중량%, Cr2O3 0.001~1중량%, SrO 0.001~1중량%, Li2O 0.001~1중량%, BaO 0.001~1중량% 및 PbO 0.001~1중량%를 포함하는 물질을 사용할 수 있다.The purified sludge powder is composed of 40 to 60% by weight of SiO 2 , 25 to 45% by weight of Al 2 O 3 , 2 to 10% by weight of Fe 2 O 3 , CaO 0.1 to 3%, and MgO 0.1 to 5% by weight. , K 2 O 0.1-6%, Na 2 O 0.01-2%, TiO 2 0.01-2%, P 2 O 5 0.01-3%, MnO 0.01-2%, ZrO 2 0.001--1% Materials comprising%, Cr 2 O 3 0.001 to 1% by weight, SrO 0.001 to 1% by weight, Li 2 O 0.001 to 1% by weight, BaO 0.001 to 1% by weight and PbO 0.001 to 1% by weight can be used.
본 발명의 조습보드는 수분을 흡수, 방출하는 조습성을 나타내고, 휘발성 유기화합물(Volatile Organic Compounds; VOC), 포름알데히드 등의 유해물질을 흡수할 수 있다.Humidity board of the present invention exhibits the humidity of absorbing and releasing moisture, and can absorb harmful substances such as volatile organic compounds (VOC), formaldehyde and the like.
또한, 본 발명의 조습보드는 수돗물을 만드는 정수장의 처리 과정에서 발생하는 폐 슬러지인 정수 슬러지를 재활용하므로 자원 재활용이 가능하며, 불에 잘 타지 않는 난연성으로서 무기질계 원료로 이루어지고, 원료가 저렴하여 제조비용이 낮아 대량생산이 가능하며, 인체에 무해한 무기질계 재료로 이루어지고, 발생된 유해물질을 흡수 및 방출하는 특성이 매우 우수하다. In addition, the humidity board of the present invention recycles waste sludge, which is a waste sludge generated during the treatment of water treatment plant to make tap water, so that the resources can be recycled, made of inorganic raw materials as a flame retardant that does not burn well, and the raw material is cheap Low manufacturing cost enables mass production, and is made of inorganic materials that are harmless to the human body, and is excellent in absorbing and releasing harmful substances generated.
본 발명의 조습보드는 주로 외장재, 욕실 등의 내장재 또는 채색이나 디자인이 가미된 마감재 등으로 주로 사용될 수 있다. Humidity board of the present invention can be mainly used as interior materials, such as exterior materials, bathrooms or finishing materials with a coloring or design.
도 1은 흡방습 이력곡선을 보여주는 그래프이다.1 is a graph showing a hygroscopic hysteresis curve.
도 2는 수돗물을 만드는 과정을 개략적으로 보여주는 도면이다. 2 is a view schematically showing a process of making tap water.
도 3은 영등포 정수장의 전경을 보여주는 사진이다. 3 is a photograph showing the foreground of Yeongdeungpo water purification plant.
도 4는 슬러지 농축조를 보여주는 사진이고, 4 is a photograph showing a sludge thickening tank,
도 5는 벨트 프레스를 이용하여 수분을 제거하여 케이크(Cake) 형태로 만드는 것을 보여주는 사진이다.5 is a photograph showing that the belt is formed by using a belt press to remove moisture.
도 6은 정수 슬러지를 600℃에서 10분 동안 열처리한 후의 사진이다. 6 is a photograph after heat treatment of the purified sludge for 10 minutes at 600 ℃.
도 7은 실험예 1에 따라 항온항습 실험할 때에 제조된 조습보드 시편의 옆면을규격에 맞게 데이프를 이용하여 봉한 모습을 보여주는 사진이다.FIG. 7 is a photograph showing the side of the humidity board specimen prepared when the constant temperature and humidity experiment according to Experimental Example 1 was sealed using tape according to the standard.
도 8a 및 도 8b는 실험예 1에 따라 제조한 조습보드 시편의 앞면을 주사전자현미경(Scanning Electron Microscope; SEM)으로 관찰한 사진이다. 8A and 8B are photographs of the front surface of the humidity board specimen prepared according to Experimental Example 1 with a scanning electron microscope (SEM).
도 9a 및 도 9b는 실험예 1에 따라 제조한 조습보드 시편의 옆면을 주사전자현미경(SEM)으로 관찰한 사진이다.9a and 9b are photographs of the side surface of the humidity board specimen prepared according to Experimental Example 1 with a scanning electron microscope (SEM).
도 10은 실험예 1에 따라 제조된 조습보드의 시간에 따른 흡/방습량을 보여주는 그래프이다.10 is a graph showing the moisture absorption / moisture absorption with time of the humidity board prepared according to Experimental Example 1.
이하, 첨부된 도면을 참조하여 본 발명에 따른 바람직한 실시예를 상세하게 설명한다. 그러나, 이하의 실시예는 이 기술분야에서 통상적인 지식을 가진 자에게 본 발명이 충분히 이해되도록 제공되는 것으로서 여러 가지 다른 형태로 변형될 수 있으며, 본 발명의 범위가 다음에 기술되는 실시예에 한정되는 것은 아니다. Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the following embodiments are provided to those skilled in the art to fully understand the present invention, and may be modified in various forms, and the scope of the present invention is limited to the embodiments described below. It doesn't happen.
본 발명은 수분을 흡수, 방출하는 조습성을 나타내고, 휘발성 유기화합물(Volatile Organic Compounds; VOC), 포름알데히드 등의 유해물질을 흡수할 수 있는 조습보드를 제시한다. The present invention provides a humidity control board that absorbs and releases moisture and absorbs harmful substances such as volatile organic compounds (VOC) and formaldehyde.
본 발명에서는 다량 배출되어 해양투기 되거나 폐기물로 버려져서 처리에 문제점을 가지고 있는 정수 슬러지를 주원료로 하는 친환경 소재를 개발하고자 한다. 이하에서 정수 슬러지라 함은 수돗물을 만드는 정수장의 처리 과정에서 발생하는 슬러지를 포함하는 것으로 사용한다. In the present invention, it is intended to develop an eco-friendly material containing a large amount of purified sludge as a main raw material having a problem in disposal by dumping a large amount of ocean dumping or waste. In the following, the purified sludge is used to include sludge generated in the treatment process of a water treatment plant for making tap water.
일본에서 처음 개발된 조습보드는 원하는 기공구조의 유도를 위해 계면활성제를 사용하기 때문에 제조비용이 높고 대량생산에 어려움이 있어 실제 생산에 어려움이 있다. Humidity boards, first developed in Japan, use surfactants to induce the desired pore structure, resulting in high manufacturing costs and difficulty in mass production, making it difficult to actually produce.
본 발명에서는 조습보드의 제조에 정수 슬러지를 주원료로 사용함으로써 제조비용을 낮추어 고가의 조습보드를 대체 가능하다.In the present invention, by using the purified water sludge as the main raw material in the manufacturing of the humidity board, it is possible to replace the expensive humidity board by lowering the manufacturing cost.
본 발명의 조습보드는 불에 잘 타지 않는 난연성으로서 무기질계 원료로 이루어지고, 원료가 저렴하여 제조비용이 낮아 대량생산이 가능하며, 인체에 무해한 무기질계 재료로 이루어지고, 발생된 유해물질을 흡수 및 방출하는 우수한 특성을 나타낸다. Humidity board of the present invention is a flame retardant that does not burn well, made of inorganic raw materials, the raw material is cheap and low production cost is possible to mass production, made of inorganic materials harmless to the human body, absorb the harmful substances generated And excellent properties of releasing.
본 발명의 조습보드는 주로 외장재, 욕실 등의 내장재 또는 채색이나 디자인이 가미된 마감재 등으로 주로 사용될 수 있다. Humidity board of the present invention can be mainly used as interior materials, such as exterior materials, bathrooms or finishing materials with a coloring or design.
한편, 최근까지 주거용 내장재의 역할은 대부분 시멘트벽체를 마감하는 것으로 주된 개념은 표면의 가림에 치중하였으나, 최근 들어서 획일적이지 않은 맞춤, 주문형 기능성 내장재를 아파트, 주택 등의 실내 주거공간에 적용하는 것이 확대되고 있다. 이와 관련된 시장은 급속히 형성되고 있으며 유, 무기 제품을 통틀어 2010년 기준 1500억 원대를 넘고 기하급수적으로 팽창하고 있다. On the other hand, until recently, the role of residential interior materials was to finish cement walls, and the main concept was to cover the surface, but recently, the application of non-uniform, custom-made functional interior materials to indoor residential spaces such as apartments and houses has been expanded. It is becoming. The market is rapidly forming and exponentially expanding to more than 150 billion won in 2010 for both oil and inorganic products.
다공성 조습보드는 세라믹 재질로 이루어지는 것이 가장 경쟁력 있으며, 본 발명의 다공성 조습보드는 수입 대체 효과가 크고 중국산 제품 및 유럽산 제품에 밀려 경쟁력을 잃어가고 있는 기존의 내, 외장 타일에 새로운 기능성을 부여하여 제품으로서 새로운 시장 창출 및 관련 산업의 발전에 기여할 수 있다.Porous humidity board is made of ceramic material is the most competitive, the porous humidity board of the present invention is a product by adding a new functionality to the existing interior and exterior tiles that are losing the competitiveness of imported and large replacement effect of Chinese and European products It can contribute to the creation of new markets and the development of related industries.
높은 습도는 곰팡이나 진드기의 왕성한 번식에 따라 유해의 미분말에 의해 천식이나 아토피성 피부염과 같은 알레르기 질환이 증가하고 있다. 습도가 낮으면 감기 등의 바이러스의 증식, 정전기의 측적으로 인한 정밀기기의 오동작이 발생할 수 있고, 따라서 적당한 습도의 유지가 필요하다. High humidity is the growth of allergic diseases such as asthma and atopic dermatitis due to harmful fine powder with the growth of mold and mites. If the humidity is low, malfunction of the precision equipment may occur due to the growth of viruses such as cold and the measurement of static electricity, and therefore, it is necessary to maintain proper humidity.
본 발명의 조습보드는 조습기능을 갖고 있다. 조습기능은 습도를 조절하는 기능을 의미하며, 습도가 높을 때는 습기를 빨아들이고 습도가 낮을 때는 습기를 내뿜는 기능이다. 본 발명의 조습보드는 재료의 표면에 존재하는 모세관에 의해 환경습도가 높아지면 수증기를 응축 흡습하고, 환경습도가 낮아지면 응축수를 증발하는 기능을 가지며, 건물 내부나 밀페된 생활공간에서 외부 환경변화에 대응하여 일정 범위의 습도를 유지시켜 줄 수 있는 기능성 소재이다. The humidity board of the present invention has a humidity control function. Humidity control means the function of controlling humidity, and it absorbs moisture when the humidity is high and emits moisture when the humidity is low. Humidity board of the present invention has a function of condensing and absorbing water vapor when the environmental humidity is increased by the capillary tube present on the surface of the material, and evaporating the condensate water when the environmental humidity is low, the change of the external environment in the building or in a sealed living space It is a functional material that can maintain humidity in a certain range.
도 1은 흡방습 이력곡선을 보여주는데, 도 1에서 'adsorption'은 흡습을 나타내고 'desorption'은 방습(습기의 증발)을 나타낸다.1 shows a hygroscopic hysteresis curve, in which 'adsorption' represents moisture absorption and 'desorption' represents moisture dampening (evaporation of moisture).
도 1에 나타낸 흡습 기능은 기공의 직경이 작을수록 낮은 습도에서도 일어나게 되는데, 약 10㎚의 기공은 상대습도(RH) 90%에서 응축이 일어나게 되며, 습기의 증발(방습) 또한 기공 직경이 작을수록 낮은 습도에서 일어나게 되는데 약 10㎚의 기공에서의 증발은 응축보다 낮은 상대습도(RH) 80%에서도 일어난다. 이러한 현상은 흡방습 이력곡선으로 설명되며, 흡방습 기준의 습도는 기공 크기에 의존하고 그 양은 기공률에 따라 증가한다. 따라서, 기공의 크기가 클수록 높은 습도를 중심으로 변화하게 되는데, 일반적으로 평균습도 40~70%일 때 약 3~7.5㎚의 기공범위에서 흡방습이 일어난다고 알려져 있다.The moisture absorption function shown in FIG. 1 occurs even at low humidity as the pore diameter is small, and the pore at about 10 nm causes condensation at 90% relative humidity (RH), and the evaporation (moisture) of moisture also decreases as the pore diameter is smaller. At low humidity, evaporation at about 10 nm pores occurs at 80% relative humidity (RH), lower than condensation. This phenomenon is explained by the hygroscopic hysteresis curve, where the humidity of the hygroscopic basis depends on the pore size and the amount increases with the porosity. Therefore, the larger the pore size is to change around the high humidity, it is generally known that the absorption and moisture absorption occurs in the pore range of about 3 ~ 7.5nm when the average humidity is 40 ~ 70%.
이러한 흡방습 특성은 발현 시간에 따라 단기형과 장기형으로 나누어지게 되는데, 단기형은 12시간 이내에 약 80% 이상을 흡습, 방습하는 것이며, 장기형은 수일간에 걸쳐 약 80% 이상을 서서히 흡습, 방습을 하는 것으로 목질계 재질 등이 속한다. 또한 재질에 따라 장, 단기형의 복합 특성을 가지게 할 수도 있다. The moisture absorption and moisture absorption characteristics are divided into short-term and long-term types according to the expression time. The short-term type absorbs and damps about 80% or more within 12 hours, and the long-term type gradually absorbs and damps about 80% or more over several days. Wood-based materials, etc. belong to this. In addition, depending on the material, it can have a long and short composite properties.
본 발명에서는 부유침전체인 정수 슬러지를 재활용하여 다공성 조습보드의 주원료로 사용한다. In the present invention, it is used as the main raw material of the porous humidifying board by recycling the purified sludge as a flotation sediment.
도 2는 수돗물을 만드는 정수장의 처리 과정을 개략적으로 보여주는 도면이다. 도 3은 영등포 정수장의 전경을 보여주는 사진이다. 도 4는 슬러지 농축조를 보여주는 사진이고, 도 5는 벨트 프레스를 이용하여 수분을 제거하여 케이크(Cake) 형태로 만드는 것을 보여주는 사진이다.2 is a view schematically showing a treatment process of a water treatment plant for making tap water. 3 is a photograph showing the foreground of Yeongdeungpo water purification plant. Figure 4 is a photograph showing a sludge thickening tank, Figure 5 is a photograph showing the removal of moisture using a belt press to make a cake (Cake) form.
대부분의 정수 슬러지는 우리가 먹는 수돗물을 만드는 도 2와 같은 공정 중에서 침전지 과정에서 주로 발생한다. 침전지에서 배수슬러지가 배출되고, 배수슬러지는 1차농축조 및 2차농축조를 거쳐 농축된 후, 벨트 프레스 등을 이용하여 과량의 수분이 제거되고 케이크(Cake) 형태로 배출된다. 이렇게 케이크 형태로 얻어지는 정수 슬러지의 양은 2010년 기준으로 년간 50만 톤에 이르고 있다. Most of the purified sludge occurs mainly in the sedimentation process in the process as shown in Figure 2 to make the tap water we eat. Drainage sludge is discharged from the sedimentation basin, and the drainage sludge is concentrated through the primary concentration tank and the secondary concentration tank, and excess moisture is removed using a belt press or the like and discharged in the form of a cake. The amount of purified sludge obtained in the form of cake is 500,000 tons per year as of 2010.
일산과 수도권에서 발생하는 대부분의 정수 슬러지는 광역관리 폐기물 매립장에 매립되고 있지만, 반송, 사천, 연초 및 구천 정수장에서는 지자체 쓰레기 매립장에 매립되며, 청주, 대덕 및 황지 정수장에서는 폐기물 처리업자의 자가매립장을 이용하고 있고, 석성 정수장에서 발생되는 정수 슬러지는 농지에 살포되어 매립 성토재로 사용되고 있으며, 2007년 이전에는 정수 슬러지가 해양투기 되기도 하였다. 최근에는 일부 정수장에서 정수 슬러지의 처리 지연 등의 문제로 큰 곤란을 겪고 있는 것으로 파악되고 있다. Most of the purified water sludges from Ilsan and the metropolitan area are buried in wide area waste landfills, but in Byeon, Sacheon, Yeoncho and Gucheon water purification plants, they are buried in municipal waste landfills. Water purification sludge generated in Seokseong water purification plant is spread on farmland and used as landfill material. Prior to 2007, water purification sludge was also dumped at sea. In recent years, it has been found that some water treatment plants are suffering from problems such as delayed treatment of purified water sludge.
정수 슬러지는 500~700℃, 바람직하게는 600℃ 온도에서 열처리 후에 사용하는 것이 바람직하다. 상기 열처리에 의해 정수 슬러지 내에 함유된 유기물은 태워져 제거되게 되며, 정수 슬러지 분말을 얻을 수가 있다. The purified sludge is preferably used after heat treatment at a temperature of 500 to 700 ° C, preferably 600 ° C. By the heat treatment, the organic matter contained in the purified sludge is burned and removed, thereby obtaining purified sludge powder.
정수 슬러지 분말은 화학 조성 성분으로 SiO2 40~60중량%, Al2O3 25~45중량%, Fe2O3 2~10중량%, CaO 0.1~3중량%, MgO 0.1~5중량%, K2O 0.1~6중량%, Na2O 0.01~2중량%, TiO2 0.01~2중량%, P2O5 0.01~3중량%, MnO 0.01~2중량%, ZrO2 0.001~1중량%, Cr2O3 0.001~1중량%, SrO 0.001~1중량%, Li2O 0.001~1중량%, BaO 0.001~1중량% 및 PbO 0.001~1중량%를 포함하는 물질일 수 있다.The purified sludge powder is composed of 40 to 60% by weight of SiO 2 , 25 to 45% by weight of Al 2 O 3 , 2 to 10% by weight of Fe 2 O 3 , CaO 0.1 to 3%, MgO 0.1 to 5%, 0.1 to 6% K 2 O, 0.01 to 2% Na 2 O, 0.01 to 2% TiO 2, 0.01 to 3% P 2 O 5 , 0.01 to 2% MnO, 0.001 to 1% ZrO 2 It may be a material comprising 0.001 to 1% by weight of Cr 2 O 3, 0.001 to 1% by weight of SrO, 0.001 to 1% by weight of Li 2 O, 0.001 to 1% by weight of BaO, and 0.001 to 1% by weight of PbO.
구이 정수장에서 발생되는 정수 슬러지를 600℃에서 10분 동안 열처리하여 형성된 정수 슬러지 분말의 성분 분석을 통해 실리카(SiO2)가 약 48~50중량%, 알루니마(Al2O3)가 약 34~37중량% 함유되어 있음을 확인할 수 있었으며, 조습보드로 제조 시에 다공체의 형성을 가능하게 한다. About 48-50 wt% of silica (SiO 2 ) and about 34 ~ about alumina (Al 2 O 3 ) through the component analysis of the purified sludge powder formed by heat-treating the purified sludge generated at the roasting water treatment plant at 600 ° C. for 10 minutes. It was confirmed that it contains 37% by weight, and enables the formation of a porous body during manufacture of the humidity board.
아래의 표 1에 구이 정수장에서 발생되는 정수 슬러지를 600℃에서 10분 동안 열처리한 후에 화학 조성 성분을 분석하여 나타내었다. 도 1은 600℃에서 10분 동안 열처리하여 얻은 정수 슬러지 분말을 보여주는 사진이다.Table 1 below shows the chemical composition after heat treatment of purified water sludge generated at the roasting water treatment plant at 600 ℃ for 10 minutes. 1 is a photograph showing the purified sludge powder obtained by heat treatment at 600 ℃ for 10 minutes.
표 1
성분 함량(중량%)
SiO2 49.8
Al2O3 34.8
Fe2O3 6.63
CaO 0.96
MgO 1.36
K2O 2.14
Na2O 0.65
TiO2 0.64
P2O5 0.85
MnO 0.24
ZrO2 0.01 이하
Cr2O3 0.03
SrO 0.02
Li2O 0.05
BaO 0.06
PbO 0.01 이하
강열감량 1.76
Table 1
ingredient Content (% by weight)
SiO 2 49.8
Al 2 O 3 34.8
Fe 2 O 3 6.63
CaO 0.96
MgO 1.36
K 2 O 2.14
Na 2 O 0.65
TiO 2 0.64
P 2 O 5 0.85
MnO 0.24
ZrO 2 0.01 or less
Cr 2 O 3 0.03
SrO 0.02
Li 2 O 0.05
BaO 0.06
PbO 0.01 or less
Ignition loss 1.76
본 발명의 바람직한 실시예에 따른 다공성 조습보드용 조성물은, 수돗물을 만드는 정수장의 처리 과정에서 발생하는 정수 슬러지가 500~700℃에서 열처리되어 형성된 정수 슬러지 분말, 상기 정수 슬러지 분말 100중량부에 대하여 폐유리 분말 70~130중량부, 상기 정수 슬러지 분말 100중량부에 대하여 실리카 분말 및 제올라이트 분말 중에서 선택된 1종 이상의 물질 10~40중량부 및 상기 정수 슬러지 분말 100중량부에 대하여 점토 70~130중량부를 포함한다. Porous humidifying board composition according to a preferred embodiment of the present invention, the purified sludge generated during the treatment process of the water purification plant to make the tap water, the wastewater sludge powder formed by heat treatment at 500 ~ 700 ℃, the waste water sludge powder with respect to 100 parts by weight 70 to 130 parts by weight of glass powder, 10 to 40 parts by weight of one or more substances selected from silica powder and zeolite powder, and 70 to 130 parts by weight of clay based on 100 parts by weight of the purified sludge powder based on 100 parts by weight of the purified sludge powder do.
상기 폐유리 분말은 소성 보조제이며, 폐유리 분말을 적게 넣을시 소성이 잘 되지 않으며 강도가 약하게 된다. 상기 폐유리 분말은 50~800메쉬 보다 작게 분쇄된 폐유리 분말로 이루어지는 것이 바람직하다.The waste glass powder is a sintering aid, and when less waste glass powder is added, the waste glass powder is not easily baked and the strength is weak. The waste glass powder is preferably made of waste glass powder pulverized smaller than 50 ~ 800 mesh.
상기 실리카 분말 및 제올라이트 분말 중에서 선택된 1종 이상의 물질은 1~80㎛의 평균 입경을 갖는 분말로 이루어지는 것이 바람직하다. 실리카 분말은 다공성 물질로 조습성능제 역할을 할 수 있다. 제올라이트의 경우도 조습성능제 역할을 할 수 있다.At least one material selected from the silica powder and the zeolite powder is preferably made of a powder having an average particle diameter of 1 ~ 80㎛. Silica powder may act as a moisture-humidifying agent as a porous material. Zeolite can also act as a moisturizing agent.
상기 점토는 벤토나이트일 수 있다. 벤토나이트는 가소성 원료로 성형을 용이하게 하며, 벤토나이트의 함량이 너무 적으면 성형이 잘 되지 않을 수 있고, 너무 많은 경우 비용이 많이 든다.The clay may be bentonite. Bentonite is a plastic raw material, which facilitates molding, and if the content of bentonite is too small, molding may not be performed well, and in many cases, it is expensive.
상기 다공성 조습보드용 조성물은 상기 정수 슬러지 분말 100중량부에 대하여 TiO2 10~40중량부를 더 포함할 수 있다. TiO2는 다공성 조습보드의 색상이 흰색을 띠게 하는 역할을 할 수 있다. The composition for the porous humidity board may further include 10 to 40 parts by weight of TiO 2 based on 100 parts by weight of the purified sludge powder. TiO 2 may serve to make the color of the porous humidity board white.
또한, 상기 다공성 조습보드용 조성물은 상기 정수 슬러지 분말 100중량부에 대하여 규조토, 석고, 알로펜, 이모고라이트, 소석회, 돌로마이트 및 숯 중에서 선택된 1종 이상의 물질 0.1~40중량부를 더 포함할 수 있다. 상기 규조토, 석고, 알로펜, 이모고라이트, 소석회, 돌로마이트 및 숯 중에서 선택된 1종 이상의 물질은 조습성능제 역할을 할 수 있다.In addition, the composition for the porous humidity board may further include 0.1 to 40 parts by weight of one or more materials selected from diatomaceous earth, gypsum, allophen, imogolite, slaked lime, dolomite and charcoal based on 100 parts by weight of the purified sludge powder. . At least one material selected from diatomaceous earth, gypsum, allophen, imogolite, slaked lime, dolomite, and charcoal may serve as a moisturizing agent.
이하에서, 나노입자를 갖는 부유침전체인 정수 슬러지를 탈수 및 열처리하고 적절한 혼합물을 활용하여 저온 소성과정을 거친 후 나노기공을 통해 흡방습 특성을 발현할 수 있는 다공성 조습보드를 제조하는 방법을 설명한다. Hereinafter, a method of manufacturing a porous humidifying board capable of expressing moisture absorption and moisture absorption characteristics through nanopores after dehydration and heat treatment of purified sludge, which is a flotation sediment having nanoparticles, and using a suitable mixture at low temperature may be described. .
수돗물을 만드는 정수장의 처리 과정에서 발생하는 정수 슬러지를 준비하고, 상기 정수 슬러지를 500~700℃에서 열처리하여 정수 슬러지 분말을 형성한다. 정수 슬러지 분말은 화학 조성 성분으로 SiO2 40~60중량%, Al2O3 25~45중량%, Fe2O3 2~10중량%, CaO 0.1~3중량%, MgO 0.1~5중량%, K2O 0.1~6중량%, Na2O 0.01~2중량%, TiO2 0.01~2중량%, P2O5 0.01~3중량%, MnO 0.01~2중량%, ZrO2 0.001~1중량%, Cr2O3 0.001~1중량%, SrO 0.001~1중량%, Li2O 0.001~1중량%, BaO 0.001~1중량% 및 PbO 0.001~1중량%를 포함하는 물질일 수 있다.Water purification sludge generated in the treatment process of the water purification plant to make the tap water is prepared, and the purified water sludge is heat treated at 500 ~ 700 ℃ to form a purified sludge powder. The purified sludge powder is composed of 40 to 60 wt% of SiO 2 , 25 to 45 wt% of Al 2 O 3 , 2 to 10 wt% of Fe 2 O 3 , 0.1 to 3 wt% of CaO, 0.1 to 5 wt% of MgO, K 2 O 0.1-6%, Na 2 O 0.01-2%, TiO 2 0.01-2%, P 2 O 5 0.01-3%, MnO 0.01-2%, ZrO 2 0.001--1% It may be a material comprising 0.001 to 1% by weight of Cr 2 O 3, 0.001 to 1% by weight of SrO, 0.001 to 1% by weight of Li 2 O, 0.001 to 1% by weight of BaO, and 0.001 to 1% by weight of PbO.
상기 정수 슬러지 분말, 상기 정수 슬러지 분말 100중량부에 대하여 상기 폐유리 분말 70~130중량부, 상기 정수 슬러지 분말 100중량부에 대하여 실리카 분말 및 제올라이트 분말 중에서 선택된 1종 이상의 물질 10~40중량부, 상기 정수 슬러지 분말 100중량부에 대하여 점토 70~130중량부를 혼합하여 다공성 조습보드용 조성물을 형성한다. 10 to 40 parts by weight of at least one material selected from silica powder and zeolite powder, based on 70 to 130 parts by weight of the waste glass powder, 100 parts by weight of purified water sludge powder, 100 parts by weight of purified water sludge powder, 70 to 130 parts by weight of clay is mixed with respect to 100 parts by weight of the purified sludge powder to form a composition for a porous humidity board.
상기 정수 슬러지 분말 100중량부에 대하여 TiO2 10~40중량부를 더 혼합할 수 있다. TiO2는 다공성 조습보드의 색상이 흰색을 띠게 하는 역할을 할 수 있다. 10 to 40 parts by weight of TiO 2 may be further mixed with respect to 100 parts by weight of the purified sludge powder. TiO 2 may serve to make the color of the porous humidity board white.
상기 정수 슬러지 분말 100중량부에 대하여 규조토, 석고, 알로펜, 이모고라이트, 소석회, 돌로마이트 및 숯 중에서 선택된 1종 이상의 물질 0.1~40중량부를 더 혼합할 수 있다. 상기 규조토, 석고, 알로펜, 이모고라이트, 소석회, 돌로마이트 및 숯 중에서 선택된 1종 이상의 물질은 조습성능제 역할을 할 수 있다.0.1 to 40 parts by weight of at least one material selected from diatomaceous earth, gypsum, allophen, imogolite, slaked lime, dolomite and charcoal may be further mixed with respect to 100 parts by weight of the purified sludge powder. At least one material selected from diatomaceous earth, gypsum, allophen, imogolite, slaked lime, dolomite, and charcoal may serve as a moisturizing agent.
상기 폐유리 분말은 다공성 조습보드의 기공율 특성 등을 고려하여 50~800메쉬 보다 작게 분쇄된 폐유리 분말을 사용하는 것이 바람직하다. 상기 폐유리 분말은 소성 보조제이며, 폐유리 분말을 적게 넣을시 소성이 잘 되지 않으며 강도가 약하게 된다. As the waste glass powder, it is preferable to use the waste glass powder pulverized smaller than 50 to 800 mesh in consideration of porosity characteristics of the porous humidity board. The waste glass powder is a sintering aid, and when less waste glass powder is added, the waste glass powder is not easily baked and the strength is weak.
상기 실리카 분말 및 제올라이트 분말 중에서 선택된 1종 이상의 물질은 다공성 조습보드의 기공율 특성 등을 고려하여 1~80㎛, 바람직하게는 20~50㎛의 평균 입경을 갖는 분말을 사용하는 것이 바람직하다. 실리카 분말은 다공성 물질로 조습성능제 역할을 할 수 있다. 제올라이트의 경우도 조습성능제 역할을 할 수 있다. The at least one material selected from the silica powder and the zeolite powder may be a powder having an average particle diameter of 1 to 80 μm, preferably 20 to 50 μm, in consideration of porosity characteristics of the porous humidity board. Silica powder may act as a moisture-humidifying agent as a porous material. Zeolite can also act as a moisturizing agent.
상기 점토는 벤토나이트일 수 있다. 벤토나이트는 가소성 원료로 성형을 용이하게 하며, 벤토나이트의 함량이 너무 적으면 성형이 잘 되지 않을 수 있고, 너무 많은 경우 비용이 많이 든다.The clay may be bentonite. Bentonite is a plastic raw material, which facilitates molding, and if the content of bentonite is too small, molding may not be performed well, and in many cases, it is expensive.
상기 혼합은 다양한 방식으로 이루어질 수 있으며, 여기서는 습식 볼밀링 공정을 이용하는 예를 설명한다. The mixing can be done in a variety of ways, here an example of using a wet ball milling process will be described.
상기 볼 밀링 공정에 대하여 설명하면, 출발원료를 볼 밀링기(ball milling machine)에 장입하여 증류수와 같은 용매와 함께 습식 혼합한다. 볼 밀링기를 이용하여 일정 속도로 회전시켜 상기 출발원료를 기계적으로 혼합하면서 분쇄한다. 상기 볼 밀링에 사용되는 볼은 불순물의 생성을 억제하기 위하여 알루미나와 같은 세라믹 재질의 볼을 사용하는 것이 바람직하며, 볼은 모두 같은 크기의 것일 수도 있고 2가지 이상의 크기를 갖는 볼을 함께 사용할 수도 있다. 볼의 크기, 밀링 시간, 볼 밀링기의 분당 회전속도 등을 조절한다. 예를 들면, 볼의 크기는 1mm~50mm 정도의 범위로 설정하고, 볼 밀링기의 회전속도는 50~500rpm 정도의 범위로 설정할 수 있다. 볼 밀링은 1~48시간 동안 실시하는 것이 바람직하다. 볼 밀링에 의해 출발원료는 미세한 크기의 입자로 혼합 및 분쇄되고, 균일한 입자 크기 분포를 갖게 된다. 상기와 같이 습식 혼합 공정을 거치면 미분화되어 슬러리(slurry) 상태를 이루며, 이러한 슬러리 상태의 물질을 다공성 조습보드용 조성물로 사용할 수 있다. Referring to the ball milling process, the starting material is charged to a ball milling machine and wet mixed with a solvent such as distilled water. The ball mill is rotated at a constant speed to grind the starting materials while mixing them mechanically. The ball used in the ball milling is preferably to use a ball made of a ceramic material, such as alumina in order to suppress the generation of impurities, the balls may be all the same size or may be used with a ball having two or more sizes together. . Adjust the size of the ball, milling time and revolutions per minute of the ball mill. For example, the size of the ball can be set in the range of about 1mm ~ 50mm, the rotation speed of the ball mill can be set in the range of about 50 ~ 500rpm. Ball milling is preferably carried out for 1 to 48 hours. Ball milling causes the starting material to be mixed and ground into finely sized particles and to have a uniform particle size distribution. Through the wet mixing process as described above it is finely divided to form a slurry (slurry) state, such a slurry material can be used as a composition for a porous humidity board.
상기 다공성 조습보드용 조성물을 성형한다. 상기 성형은 다양한 방식으로 이루어질 수 있다. Molding the composition for the porous humidity board. The molding can be done in a variety of ways.
상기 성형하는 단계 후 후술하는 소성 단계 전에 성형된 결과물의 표면에 유약을 시유하는 단계를 더 포함할 수 있다. 성형된 결과물에 실크스크린, 분무법 등을 이용하여 유약을 시유할 수 있다. 이때, 사용될 수 있는 유약에 특별히 제한이 있는 것은 아니다. 사용될 수 있는 유약의 예를 들어보면, 융점이 소성온도 보다 낮은 보로실리케이트계 프릿을 소정 크기(예컨대, 200 mesh) 보다 작게 분쇄하고 카올린과 같은 물질을 소정량(예컨대, 5중량%) 첨가하여 물에 분산시켜 유약으로 사용할 수 있다. 상기 유약의 시유는 성형된 결과물에 대한 시유표면적이 30~95%인 것이 바람직한데, 시유표면적이 95%를 초과하면 조습성능이 제한을 받게되고, 시유면적이 30%에 미달이면 사용 중 표면의 오염물이 축적될 가능성이 높아진다.After the forming step and before the firing step to be described later may further comprise the step of applying a glaze on the surface of the molded result. Glaze can be applied to the molded product by using silk screen or spraying method. At this time, there is no particular limitation on the glaze that can be used. Examples of glazes that may be used include grinding a borosilicate frit having a melting point lower than the firing temperature to less than a predetermined size (eg 200 mesh) and adding a predetermined amount (eg 5% by weight) of a substance such as kaolin to water. Can be used as a glaze by dispersing in It is preferable that the oil surface of the glaze is 30 to 95% of the surface area of the molded product. When the surface area exceeds 95%, the humidity control is limited. When the surface area of the glaze is less than 30%, the surface of the glaze is in use. The likelihood of accumulation of contaminants increases.
성형된 다공성 조습보드용 조성물을 전기로와 같은 퍼니스(furnace)에 장입하고 소성 공정을 수행한다. 상기 소성 공정은 비교적 저온인 800~1000℃ 정도의 온도에서 1분~48시간 정도 수행하는 것이 바람직하다. 소성하는 동안에 퍼니스 내부의 압력은 일정하게 유지하는 것이 바람직하다. The molded composition for the porous humidity board is charged to a furnace such as an electric furnace and subjected to a firing process. The firing process is preferably performed for 1 minute to 48 hours at a relatively low temperature of about 800 ~ 1000 ℃. It is desirable to keep the pressure inside the furnace constant during firing.
상기 소성은 800~1000℃ 범위의 온도에서 이루어지는 것이 바람직하다. 소성온도가 800℃ 미만인 경우에는 다공성 조습보드용 조성물이 불완전하게 소성되어 다공성 조습보드의 특성이 좋지 않을 수 있고, 1000℃를 초과하는 경우에는 에너지의 소모가 많아 비경제적일 수 있다. The firing is preferably carried out at a temperature in the range of 800 ~ 1000 ℃. If the firing temperature is less than 800 ℃ composition of the porous humidity board is incompletely fired may not be good characteristics of the porous humidity board, when the temperature exceeds 1000 ℃ may be uneconomical due to high energy consumption.
상기 소성온도까지는 1~50℃/min의 승온속도로 상승시키는 것이 바람직한데, 승온 속도가 너무 느린 경우에는 시간이 오래 걸려 생산성이 떨어지고 승온 속도가 너무 빠른 경우에는 급격한 온도 상승에 의해 열적 스트레스가 가해질 수 있으므로 상기 범위의 승온 속도로 온도를 올리는 것이 바람직하다. It is preferable to increase the heating temperature at a temperature increase rate of 1 to 50 ° C./min. If the temperature rising rate is too slow, productivity may take a long time, and if the temperature rising rate is too fast, thermal stress may be applied due to a rapid temperature rise. Since it is possible to raise the temperature at a temperature rising rate in the above range, it is preferable.
또한, 상기 소성은 소성온도에서 1분~48시간 동안 유지하는 것이 바람직하다. 소성 시간이 너무 긴 경우에는 에너지의 소모가 많으므로 비경제적일 뿐만 아니라 더 이상의 소성 효과를 기대하기 어려우며, 소성 시간이 작은 경우에는 불완전한 소성이 이루어질 수 있다. In addition, the firing is preferably maintained for 1 minute to 48 hours at the firing temperature. If the firing time is too long, energy consumption is high, so it is not economical and it is difficult to expect further firing effects, and if the firing time is small, incomplete firing may be achieved.
또한, 상기 소성은 산화 분위기(예컨대, 공기(air) 또는 산소(O2) 분위기)에서 실시하는 것이 바람직하다. In addition, the firing is preferably carried out in an oxidizing atmosphere (for example, air or oxygen (O 2 ) atmosphere).
소성 공정을 수행한 후, 퍼니스 온도를 하강시켜 다공성 조습보드를 언로딩한다. 상기 퍼니스 냉각은 퍼니스 전원을 차단하여 자연적인 상태로 냉각되게 하거나, 임의적으로 온도 하강률(예컨대, 10℃/min)을 설정하여 냉각되게 할 수도 있다. 퍼니스 온도를 하강시키는 동안에도 퍼니스 내부의 압력은 일정하게 유지하는 것이 바람직하다. After carrying out the firing process, the furnace temperature is lowered to unload the porous humidity board. The furnace cooling may be allowed to cool down in a natural state by turning off the furnace power source, or to set a temperature drop rate (eg, 10 ° C./min) arbitrarily. It is desirable to keep the pressure inside the furnace constant while the furnace temperature is lowered.
본 발명은 하기의 실험예들을 참고로 더욱 상세히 설명되며, 이 실험예들이 본 발명을 제한하는 것은 아니다.The invention is described in more detail with reference to the following experimental examples, which do not limit the invention.
<실험예 1>Experimental Example 1
정수 슬러지(SL)를 600℃ 온도에서 10분 동안 열처리하였다. 600℃에서 열처리되어 형성된 정수 슬러지 분말은 표 1 및 도 6에 나타낸 것과 동일하다. The purified sludge (SL) was heat treated at 600 ° C. for 10 minutes. The purified sludge powder formed by heat treatment at 600 ° C. is the same as that shown in Table 1 and FIG. 6.
출원원료로 600℃에서 열처리된 정수 슬러지 분말 30wt%, 폐유리(GP) 분말 30wt%, 실리카 분말 10wt%, 벤토나이트(BE) 30wt%를 혼합한 후, 분무건조법(Spray drying)을 이용하여 건조하여 다공성 조습보드용 조성물을 얻었다. 상기 폐유리 분말은 200메쉬 보다 작게 분쇄된 폐유리 분말을 사용하였다. 상기 실리카 분말은 평균 입도 27㎛, 표면적(surface area)이 약 301.32 ㎡/g의 물리적 성능을 갖는 것을 사용하였다.30 wt% of purified sludge powder, 30 wt% of waste glass (GP), 10 wt% of silica powder, and 30 wt% of bentonite (BE) were mixed with the application material, and then dried by spray drying. The composition for porous humidity boards was obtained. The waste glass powder was used as crushed waste glass powder smaller than 200 mesh. The silica powder was used having an average particle size of 27 μm and a surface area of about 301.32 m 2 / g.
상기 다공성 조습보드용 조성물을 조습보드 규격에 맞추어 400Kg/㎠의 하중으로 프레스(press)하여 조습보드 시편 형태로 제작하였다.The composition for the porous humidity board was pressed in a load of 400Kg / cm 2 in accordance with the humidity board specifications, and manufactured in the form of a humidity board specimen.
시유한 결과물을 터널형 가마(Tunnel Kiln)를 사용하여 850℃에서 10분 동안 소성하여 조습보드 시편을 얻었다.The sampled product was fired at 850 ° C. for 10 minutes using a tunnel kiln to obtain a humidity board specimen.
제조한 조습보드 시편은 기공율을 측정하였고, 흡수율/방출율 측정 시 항온항습기를 사용하여 관찰하였다.The prepared humidity board specimens were measured for porosity, and observed using a thermo-hygrostat when measuring the absorption rate / release rate.
제조한 조습보드 시편의 흡수율/방출율 분석방법으로 항온항습기를 사용하였다. 흡/방출율을 측정시 동일한 온도 조건에서 습도의 조건을 달리하여 흡수율과 방출율을 측정할 수 있다.A thermo-hygrostat was used as a method for absorbance / release rate of the prepared humidity board specimens. When measuring the absorption / release rate, the absorption rate and the release rate can be measured by changing the humidity conditions at the same temperature conditions.
도 7과 같이 조습보드 시편의 옆면을 데이프를 이용하여 봉하게 되며, 윗면이 보이도록 준비한 후 조습보드 시편을 항온항습기에 넣고 25의 온도에서 습도 25%로 셋팅(setting) 후 12 시간 후에 샘플을 꺼내서 무게를 측정하였다. The side of the humidity board specimen is sealed using a tape as shown in FIG. 7, and after preparing the upper surface to be visible, the sample board is placed in a thermo-hygrostat and set to 25% humidity at a temperature of 25. The weight was taken out.
무게 측정 후 25℃에서 90%로 습도를 올린 다음 12시간 후에 꺼내어 무게를 측정하고, 단면에 흡습된 물의 양을 계산하였다. After the weight measurement, the humidity was raised to 90% at 25 ° C., and after 12 hours, the weight was measured, and the amount of water absorbed in the cross section was calculated.
이것을 다시 항온항습기에 집어넣은 후 25℃에서 습도 25%로 셋팅 후 12시간 후에 꺼내어 무게를 측정하고, 방습량을 계산하였다. This was put back into the thermo-hygrostat and then set to 25% humidity at 25 ° C. and then taken out after 12 hours to measure the weight and calculate the moisture-proof amount.
물을 흡/방습한 양을 ㎡의 단위면적으로 환산하여 흡/방습량을 계산하였다.The amount of water absorption / moisture absorption was calculated in terms of the unit area of m 2.
표 2는 실험예 1에 따라 제조한 조습보드 시편의 흡/방출율을 보여주는 표이다. 표 2에서 'm0'은 조습보드 시편을 항온항습기에 넣고 25℃의 온도에서 습도 25%로 셋팅(setting) 후 12 시간 후에 샘플을 꺼내서 측정한 무게이고, 'm1'은 25℃에서 90%로 습도를 올린 다음 12시간 후에 꺼내어 측정한 무게이며,'m2'는 25℃에서 습도 90%로 세팅 후 12시간 후에 꺼내어 무게를 측정하고 나서 다시 항온항습기에 넣고 25℃에서 습도 25%로 셋팅 후 12시간 후에 꺼내어 측정한 무게이고, 'A'는 조습보드 시편의 면적을 의미한다. Table 2 is a table showing the absorption / release rate of the humidity board specimen prepared according to Experimental Example 1. In Table 2, 'm 0 ' is the weight measured by taking out the sample after 12 hours after putting the humidity board specimen into the thermo-hygrostat and setting it to 25% humidity at a temperature of 25 ° C, and 'm 1 ' is 90 ° at 25 ° C. It is the weight measured after increasing the humidity to% and taking it out after 12 hours, and 'm 2 ' is set to 90% humidity at 25 ° C and taken out after 12 hours to measure the weight, and then put it in the constant temperature and humidity chamber again at 25 ° C to 25% humidity. The weight was taken out after 12 hours of setting, and 'A' means the area of the humidity board specimen.
표 2
실험예 1
항온항습전 154.45g
T0:25℃ / H: 25% / 12h (m0) 154.52g
T0:25℃ / H: 90% / 12h (m1) 156.58g
흡수량((m1-m0)/A) 103.48
가로*세로 10㎝*11.5㎝
단면적(A) 115.0㎠
179.1/㎡
T0:25℃ / H: 25% / 12h (m2) 154.45g
방출량((m2-m1)/A) 185.2/㎡
TABLE 2
Experimental Example 1
Constant temperature and humidity war 154.45 g
T 0 : 25 ℃ / H: 25% / 12h (m 0 ) 154.52 g
T 0 : 25 ℃ / H: 90% / 12h (m 1 ) 156.58 g
Absorption amount ((m 1 -m 0 ) / A) 103.48
Width * length 10cm * 11.5cm
Cross-sectional area (A) 115.0㎠
179.1 / ㎡
T 0 : 25 ℃ / H: 25% / 12h (m 2 ) 154.45 g
Emission amount ((m 2 -m 1 ) / A) 185.2 / ㎡
표 2는 실험예 1에 따라 제조된 조습보드 시편을 온도 25℃, 습도 25%에서 12시간 동안 반응시킨 다음에 온도 25℃, 습도 90%에서 12시간 반응시킨 후 흡수율을 측정하고 온도 25℃, 습도 25%에서 12시간 반응시켜 방출율을 측정한 결과를 보여준다.Table 2 shows the humidity of the humidity board specimen prepared according to Experimental Example 1 for 12 hours at a temperature of 25 ℃, 25% humidity for 12 hours and then reacted for 12 hours at a temperature of 25 ℃, 90% humidity to measure the absorption rate and temperature 25 ℃, The reaction rate was measured by reacting at 25% humidity for 12 hours.
도 8a 및 도 8b는 실험예 1에 따라 제조한 조습보드 시편의 앞면을 주사전자현미경(Scanning Electron Microscope; SEM)으로 관찰한 사진이고, 도 9a 및 도 9b는 실험예 1에 따라 제조한 조습보드 시편의 옆면을 주사전자현미경(SEM)으로 관찰한 사진이다.8a and 8b are photographs of the front surface of the humidity board specimen prepared according to Experimental Example 1 by Scanning Electron Microscope (SEM), Figure 9a and 9b is a humidity board prepared according to Experimental Example 1 The side surface of the specimen was observed with a scanning electron microscope (SEM).
도 8a 내지 도 9b에 도시한 바와 같이 실험예 1에 따라 제조된 조습보드 시편에는 기공이 존재하는 것을 볼 수 있다.As shown in Figure 8a to 9b it can be seen that the pores are present in the humidity board specimen prepared according to Experimental Example 1.
도 10는 실험예 1에 따라 제조된 조습보드 시편의 시간에 따른 흡/방습량을 보여주는 그래프이다.10 is a graph showing the moisture absorption / moisture absorption with time of the humidity board specimen prepared according to Experimental Example 1.
실험예 1에 따라 제조한 조습보드 시편의 기공율을 측정하였다. 실험예 1에 따라 제조한 조습보드 시편의 평균 기공 지름(average pore diameter)는 742Å 이었으며, 체적 밀도(bulk density)는 1.0237g/㎖ 이었고, 겉보기 밀도(apparent density)는 1.9252g/㎖ 이었으며, 기공율(porosity)은 46.8259% 이었다. The porosity of the humidity board specimen prepared according to Experimental Example 1 was measured. The average pore diameter of the humidity board specimen prepared according to Experimental Example 1 was 742 mm, the bulk density was 1.0237 g / ml, the apparent density was 1.9252 g / ml, and the porosity. porosity was 46.8259%.
이상, 본 발명의 바람직한 실시예를 들어 상세하게 설명하였으나, 본 발명은 상기 실시예에 한정되는 것은 아니며, 본 발명의 기술적 사상의 범위 내에서 당 분야에서 통상의 지식을 가진 자에 의하여 여러 가지 변형이 가능하다.As mentioned above, although the preferred embodiment of this invention was described in detail, this invention is not limited to the said embodiment, A various deformation | transformation by a person with ordinary skill in the art within the scope of the technical idea of this invention is carried out. This is possible.

Claims (15)

  1. 수돗물을 만드는 정수장의 처리 과정에서 발생하는 정수 슬러지가 500~700℃에서 열처리되어 형성된 정수 슬러지 분말;Water purification sludge powder formed by heat treatment at 500 ~ 700 ℃ the purified sludge generated in the treatment process of tap water to make tap water;
    상기 정수 슬러지 분말 100중량부에 대하여 폐유리 분말 70~130중량부;70 to 130 parts by weight of waste glass powder based on 100 parts by weight of the purified sludge powder;
    상기 정수 슬러지 분말 100중량부에 대하여 실리카 분말 및 제올라이트 분말 중에서 선택된 1종 이상의 물질 10~40중량부; 및10 to 40 parts by weight of at least one material selected from silica powder and zeolite powder with respect to 100 parts by weight of the purified sludge powder; And
    상기 정수 슬러지 분말 100중량부에 대하여 점토 70~130중량부를 포함하는 다공성 조습보드용 조성물.Porous humidity board composition comprising 70 to 130 parts by weight of clay based on 100 parts by weight of the purified sludge powder.
  2. 제1항에 있어서, 상기 정수 슬러지 분말 100중량부에 대하여 TiO2 10~40중량부를 더 포함하는 것을 특징으로 하는 다공성 조습보드용 조성물.According to claim 1, Composition for porous humidity board further comprises 10 to 40 parts by weight of TiO 2 with respect to 100 parts by weight of the purified sludge powder.
  3. 제1항에 있어서, 상기 정수 슬러지 분말 100중량부에 대하여 규조토, 석고, 알로펜, 이모고라이트, 소석회, 돌로마이트 및 숯 중에서 선택된 1종 이상의 물질 0.1~40중량부를 더 포함하는 것을 특징으로 하는 다공성 조습보드용 조성물.According to claim 1, Porous characterized in that it further comprises 0.1 to 40 parts by weight of at least one material selected from diatomaceous earth, gypsum, allophene, imogolite, slaked lime, dolomite and charcoal based on 100 parts by weight of the purified sludge powder Humidity board composition.
  4. 제1항에 있어서, 상기 점토는 벤토나이트인 것을 특징으로 하는 다공성 조습보드용 조성물.The composition of claim 1, wherein the clay is bentonite.
  5. 제1항에 있어서, 상기 폐유리 분말은 50~800메쉬 보다 작게 분쇄된 폐유리 분말로 이루어지는 것을 특징으로 하는 다공성 조습보드용 조성물.The composition of claim 1, wherein the waste glass powder is made of waste glass powder pulverized smaller than 50 to 800 mesh.
  6. 제1항에 있어서, 상기 실리카 분말 및 제올라이트 분말 중에서 선택된 1종 이상의 물질은 1~80㎛의 평균 입경을 갖는 분말로 이루어지는 것을 특징으로 하는 다공성 조습보드용 조성물.The composition of claim 1, wherein the at least one material selected from the silica powder and the zeolite powder is made of a powder having an average particle diameter of 1 to 80 μm.
  7. 제1항에 있어서, 상기 정수 슬러지 분말은 화학 조성 성분으로 SiO2 40~60중량%, Al2O3 25~45중량%, Fe2O3 2~10중량%, CaO 0.1~3중량%, MgO 0.1~5중량%, K2O 0.1~6중량%, Na2O 0.01~2중량%, TiO2 0.01~2중량%, P2O5 0.01~3중량%, MnO 0.01~2중량%, ZrO2 0.001~1중량%, Cr2O3 0.001~1중량%, SrO 0.001~1중량%, Li2O 0.001~1중량%, BaO 0.001~1중량% 및 PbO 0.001~1중량%를 포함하는 물질인 것을 특징으로 하는 다공성 조습보드용 조성물.According to claim 1, wherein the purified sludge powder is 40 to 60% by weight of SiO 2 , 25 to 45% by weight of Al 2 O 3 , 2 to 10% by weight of Fe 2 O 3 , CaO 0.1 to 3%, MgO 0.1-5%, K 2 O 0.1-6%, Na 2 O 0.01-2%, TiO 2 0.01-2%, P 2 O 5 0.01-3%, MnO 0.01-2%, ZrO 2 0.001-1 wt%, Cr 2 O 3 0.001-1 wt%, SrO 0.001-1 wt%, Li 2 O 0.001-1 wt%, BaO 0.001-1 wt% and PbO 0.001-1 wt% Porous humidity board composition, characterized in that the material.
  8. (a) 수돗물을 만드는 정수장의 처리 과정에서 발생하는 정수 슬러지를 준비하는 단계;(a) preparing a water purification sludge generated during the treatment of the water treatment plant for making tap water;
    (b) 상기 정수 슬러지를 500~700℃에서 열처리하여 정수 슬러지 분말을 형성하는 단계;(b) heat treating the purified sludge at 500-700 ° C. to form purified sludge powder;
    (c) 상기 정수 슬러지 분말, 상기 정수 슬러지 분말 100중량부에 대하여 상기 폐유리 분말 70~130중량부, 상기 정수 슬러지 분말 100중량부에 대하여 실리카 분말 및 제올라이트 분말 중에서 선택된 1종 이상의 물질 10~40중량부, 상기 정수 슬러지 분말 100중량부에 대하여 점토 70~130중량부를 혼합하여 다공성 조습보드용 조성물을 형성하는 단계;(c) 10 to 40 one or more substances selected from silica powder and zeolite powder based on 70 to 130 parts by weight of the waste glass powder and 100 parts by weight of the purified water sludge powder and 100 parts by weight of the purified water sludge powder Part by weight, by mixing 70 to 130 parts by weight of clay with respect to 100 parts by weight of the purified sludge powder to form a composition for a porous humidity board;
    (d) 상기 다공성 조습보드용 조성물을 성형하는 단계; 및(d) molding the composition for the porous humidity board; And
    (e) 성형된 결과물을 소성하는 단계를 포함하며, (e) firing the shaped result;
    상기 소성은 800~1000℃의 온도에서 이루어지는 것을 특징으로 하는 다공성 조습보드의 제조방법.The firing is a method of manufacturing a porous humidity board, characterized in that at a temperature of 800 ~ 1000 ℃.
  9. 제8항에 있어서, 상기 (c) 단계에서,The method of claim 8, wherein in step (c),
    상기 정수 슬러지 분말 100중량부에 대하여 TiO2 10~40중량부를 더 혼합하는 것을 특징으로 하는 다공성 조습보드의 제조방법.10 to 40 parts by weight of TiO 2 is further mixed with respect to 100 parts by weight of the purified sludge powder.
  10. 제8항에 있어서, 상기 (c) 단계에서,The method of claim 8, wherein in step (c),
    상기 정수 슬러지 분말 100중량부에 대하여 규조토, 석고, 알로펜, 이모고라이트, 소석회, 돌로마이트 및 숯 중에서 선택된 1종 이상의 물질 0.1~40중량부를 더 혼합하는 것을 특징으로 하는 다공성 조습보드의 제조방법.Method for producing a porous humidity board further characterized in that 0.1 to 40 parts by weight of at least one selected from diatomaceous earth, gypsum, allophen, imogolite, slaked lime, dolomite and charcoal based on 100 parts by weight of the purified sludge powder.
  11. 제8항에 있어서, 상기 (d) 단계 후 상기 (e) 단계 전에,The method of claim 8, wherein after step (d) and before step (e),
    성형된 결과물의 표면에 유약을 시유하는 단계를 더 포함하며, 성형된 결과물에 대한 시유표면적이 30~95%인 것을 특징으로 하는 다공성 조습보드의 제조방법.The method of manufacturing a porous humidity board further comprises the step of applying a glaze on the surface of the molded product, characterized in that the surface area of the molded product is 30 ~ 95%.
  12. 제8항에 있어서, 상기 점토는 벤토나이트인 것을 특징으로 하는 다공성 조습보드의 제조방법.9. The method of claim 8, wherein the clay is bentonite.
  13. 제8항에 있어서, 상기 폐유리 분말은 50~800메쉬 보다 작게 분쇄된 폐유리 분말을 사용하는 것을 특징으로 하는 다공성 조습보드의 제조방법.The method of claim 8, wherein the waste glass powder is a method for producing a porous humidity board, characterized in that using the waste glass powder pulverized smaller than 50 ~ 800 mesh.
  14. 제8항에 있어서, 상기 실리카 분말 및 제올라이트 분말 중에서 선택된 1종 이상의 물질은 1~80㎛의 평균 입경을 갖는 분말을 사용하는 것을 특징으로 하는 다공성 조습보드의 제조방법.The method of claim 8, wherein the at least one material selected from the silica powder and the zeolite powder is a powder having an average particle diameter of 1 to 80 μm.
  15. 제8항에 있어서, 상기 정수 슬러지 분말은 화학 조성 성분으로 SiO2 40~60중량%, Al2O3 25~45중량%, Fe2O3 2~10중량%, CaO 0.1~3중량%, MgO 0.1~5중량%, K2O 0.1~6중량%, Na2O 0.01~2중량%, TiO2 0.01~2중량%, P2O5 0.01~3중량%, MnO 0.01~2중량%, ZrO2 0.001~1중량%, Cr2O3 0.001~1중량%, SrO 0.001~1중량%, Li2O 0.001~1중량%, BaO 0.001~1중량% 및 PbO 0.001~1중량%를 포함하는 물질을 사용하는 것을 특징으로 하는 다공성 조습보드의 제조방법.The method according to claim 8, wherein the purified sludge powder is 40 to 60% by weight of SiO 2 , 25 to 45% by weight of Al 2 O 3 , 2 to 10% by weight of Fe 2 O 3 , 0.1 to 3% by weight of CaO, MgO 0.1-5%, K 2 O 0.1-6%, Na 2 O 0.01-2%, TiO 2 0.01-2%, P 2 O 5 0.01-3%, MnO 0.01-2%, ZrO 2 0.001-1 wt%, Cr 2 O 3 0.001-1 wt%, SrO 0.001-1 wt%, Li 2 O 0.001-1 wt%, BaO 0.001-1 wt% and PbO 0.001-1 wt% Method for producing a porous humidity board, characterized in that using the material.
PCT/KR2014/000017 2013-01-03 2014-01-02 Composition for porous humidity control board reutilizing water purification sludge, and method for manufacturing porous humidity control board using same WO2014107032A1 (en)

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