KR101495599B1 - The manufacturing method of block using industrial byproducts - Google Patents

Abstract

The present invention relates to a method for improving the recyclability by simultaneously using a plant sludge as a byproduct for industrial use and a bottom ash obtained as a by-product in a thermal power plant and aging the same by adding another ash, Or strength reinforcement to the block composition.
The present invention relates to a method for producing environmentally friendly bricks using purified water sludge, which comprises mixing bottom ash obtained as a by-product in a thermal power plant with water treatment sludge having a water content in the range of 15 to 25%, wherein water treatment sludge and bottom ash are 40 ± 10: 60 ± 10 (CaCO ₃ ) -containing reaction product obtained by mixing the CaO component contained in the bottom ash with water (H ₂ O) in the sludge to obtain a calcium carbonate (CaCO ₃₎ ) Containing 70 ± 10 parts by weight of manganese in a range of 30 ± 10 parts by weight and aging the mixture in a range of 2 to 6 hours and 50 ± 10 parts by weight of the aged reaction product after passing through the second step, And a third step of mixing bricks with ordinary aggregate or sand in a range of 25 ± 5 parts by weight and pressing them with a press to obtain a brick product.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a method of manufacturing a block using industrial byproducts,

In this paper, we propose a new method to improve the efficiency of recycling by mixing potable sludge, which is a byproduct of industrial use, and bottom ash, which is obtained as a byproduct in a thermal power plant, at a suitable ratio to secure a certain range of strength by potential hydraulic and pozzolanic reaction, And a block composition used as a brick or a road boundary stone in which yellow stones, general aggregates or functional raw materials are added after aging to secure a certain strength.

In general, a water purification plant sludge is a sludge sludge in a mud state generated by precipitating suspended solids in the process of purifying tap water, and is used as an inorganic flocculant such as aluminum sulphate or the like to be administered to remove contaminants such as floating water and heavy metals Polymer flocculants, and organic substances such as chlorine or ozone, which are administered for chemical sterilization of Escherichia coli and common bacteria.

In the meantime, the water treatment plant sludge has been subjected to concentration, dehydration and drying process as waste, and then it has been buried in most landfills or transported by transporting ships to the sea, causing environmental pollution. However, sludge

South Korea, which is banned internationally under the London Treaty (1972), has been largely dependent on marine dumping, and is seeking an effective treatment scheme because sludge is forbidden entirely from marine dumping. However, there is no alternative yet.

Bottom ash is the bottom ash where massive or large sized fly ash falls to the bottom of the boiler when coal is burned in most thermal power plants. Bottom ash accounts for about 20 ~ 40% of coal ash As the total amount of coal ash generated from domestic thermal power plants is about 6 million tons per year, about 800,000 to 2.4 million tons are generated as industrial waste.

Fly ash, which accounts for about 60 ~ 80% of coal ash production, is being recycled actively as an admixture for concrete or a raw material for cement secondary product. However, there is no problem in the treatment of fly ash, but the bottom ash has not been actively recycled yet, .

In the present invention, water and sludge are mixed at a suitable ratio when the water treatment sludge and bottom ash are recycled as useful resources and used for land or marine use. And to provide a block composition capable of ensuring solidification and a certain range of strength.

In the prior art disclosed as a technology for recycling a water treatment plant sludge as a useful industrial resource as an industrial by-product, the patent application No. 0061607 discloses a packaging material composition for securing permeability and water retention, comprising 15 to 25 wt% of water treatment sludge, To 20 wt%, molding sand 10 to 20 wt%, loess 10 to 20 wt%, coarse aggregate 10 to 20 wt%, sand 5

To 15 wt% of anhydrous gypsum, 3 to 8 wt% of anhydrous gypsum, and 3 to 8 wt% of burnt lime are disclosed in Korean Patent Application Laid- A technique for producing soil remediation agent by mixing and pulverizing trace elements such as lime, lime, effective phosphoric acid, various metal salts and boron has been introduced, and Patent Document No. 0035893 discloses a method for using the water treatment plant sludge as a soil for crops Technology is introduced to heat treat sludge of a water treatment plant and mix organic materials such as rice bran, rice husks, sawdust and the like, and then subject to secondary heat treatment to produce soil for crops.

Also, according to prior arts disclosed with industrial purpose using bottom ash which is an industrial by-product, in Patent No. 1066194, 5 to 30 parts by weight of a binder are mixed with 100 parts by weight of bottom ash by a method of producing a water- 1 to 10 parts by weight of a vegetable admixture is added to 100 parts by weight of the binder to provide a cured bottom ash block after molding the bottom ash mixture into a block, 1 to 20 parts by weight of a strength improver is further added to 100 parts by weight of the binder In the process for producing a block for building a rice plant, a method for producing a block for building a rice plant is proposed in which 70 to 80 parts by weight of powder, 80 to 95 parts by weight of sand, (Liquid) 0.1 to 0.2 parts by weight, an anti-neutralizing agent (liquid) 0.05 to 0.5 parts by weight, water 30 to 40 parts by weight Wherein the powder comprises 25 to 34 wt% of slag fine powder, 10 to 19 wt% of fly ash or bottom ash, 35 to 44 wt% of ordinary Portland cement or white Portland cement, 10 to 19 wt% of expanding material, 5 to 14 wt% of CSA, 5 to 10 wt% of meta-kaolin, 1 to 5 wt% of a thickener

And a block for building a ricefield is provided.

However, in the conventional art as described above, the present invention is not an invention that has been started with the problem of including the purification plant sludge and the bottom ash, which are industrial byproducts, It is confirmed that the technical arrangement for providing as a block in which ash is simultaneously injected and water contained in the sludge and CaO contained in the bottom ash lead to potential hydraulic and pozzolanic reaction to secure a certain range of strength is not disclosed.

In this paper, we propose a new method to increase the recyclability of the sludge by combining the sludge of industrial water treatment plant and the bottom ash obtained as a byproduct in a thermal power plant at a suitable ratio to secure a certain range of strength by potential hydraulic or pozzolanic reaction, A block which secures a certain strength by adding a raw material or strength reinforcing agent having loam, general aggregate or far-infrared radiation function after aging process in which the salt component of the chemical component in the water treatment plant sludge is changed into the hard insoluble salt, To provide a composition.

In this study, water purifier sludge and bottom ash were simultaneously used as industrial byproducts, and they were recycled as useful resources in industry by taking advantage of their inherent characteristics. Water purifier sludge and bottom ash were simultaneously injected and moisture contained in sludge and bottom ash It is possible to obtain a block which is used as a brick or a road boundary stone by securing a certain range of strength by inducing latent hydraulic or pozzolanic reaction.

The present invention relates to a method for obtaining eco-friendly bricks using purified water sludge, comprising mixing bottom ash obtained as a by-product in a thermal power plant with water treatment sludge having a water content in the range of 15 to 25%, wherein water treatment sludge and bottom ash are 40 ± 10: 10 parts by weight of water to produce a hydraulic reaction product by reacting the CaO component contained in the bottom ash with water (H ₂ O) in the sludge; A second step of mixing 70 ± 10 parts by weight of the hydraulic reaction product obtained in the first step in a range of 30 ± 10 parts by weight with respect to matured components and aging in a range of 2 to 6 hours; 25 ± 5 parts by weight of yellow loam and 25 ± 5 parts by weight of general aggregate or sand are mixed with 50 ± 10 parts by weight of the aged reactant after the second step and pressed to obtain a block product for use as a brick or barrier The present invention can be applied to a block manufacturing method comprising three steps.

In the third step, in the third step, raw materials selected from quartz and pearlite are additionally added in a ratio of 10 ± 5 parts by weight in addition to ordinary aggregate or sand, and the mixture is applied by a press, or mixed with magnesium oxide and magnesium chloride Magnesium oxychloride (MOC) made by mixing magnesium oxide and magnesium sulfate, magnesium oxysulfate (MOS) made by mixing magnesium oxide and magnesium sulfate, magnesium oxide made by mixing magnesium oxide and ammonium phosphate solution (magnesium oxide) phosphate, MAP) is added as a strength reinforcing agent so as to have a rapid solidification effect.

The present invention relates to an environmentally friendly brick which is provided using purified water sludge and bottom ash, and is mixed with a bottom ash obtained as a by-product from a thermal power plant in a water treatment plant sludge having a water content of 15 to 25% (60 ± 10 parts by weight), so that the CaO component contained in the bottom ash is reacted with water (H ₂ O) in the sludge to obtain a hydraulic reaction product; and 70 ± 10 parts by weight of the hydraulic reaction product obtained in the first step A second step of aging the mixture in a range of 30 ± 10 parts by weight in the range of 2 ± 6 hours and the second step of mixing 50 ± 10 parts by weight of the aged reaction product obtained in the second step with 25 ± 5 parts by weight of loess, Magnesium oxychloride (MOC), magnesium oxide (MgO) and magnesium oxide (MgO), which are mixed with magnesium oxide and magnesium chloride mixed at a ratio of 25 ± 5 parts by weight, Magnesium oxide-based fixing agent selected from magnesium oxysulfate (MOS) mixed with magnesium sulfate, magnesium phosphate (MAP) prepared by mixing magnesium oxide and ammonium phosphate solution, is used as the strength reinforcing agent 20 ± 10 parts by weight, and pressed by a press to obtain an eco-friendly block through the provided means.

The water sludge used in the manufacturing process of the brick here is subjected to a process of using various chemicals as sedimentation agent in order to obtain sedimentation effects of various suspended solids during the water treatment process. Therefore, the sludge generated in the water treatment plant is subjected to strict treatment by the waste management method Since the salt of the compound is contained in the salt of the compound, the salt of the residual compound is dissolved in the recycling process due to the material of the brick and the like, which implies a risk of deteriorating the binding force. Therefore, The salt of the compound is bound to the cellulose component to change into an insoluble salt.

The parvum is generally caused by excretion in the rearing process of the horse, and when the parvum is dried in the sunshine for 2 ~ 3 days, when the moisture is lost, about 70 ~ 80 wt% of the parvum is composed of the cellulose component. It is predicted that the salt of the compound remaining in the water treatment plant sludge is combined with the cellulose of the parasite to prevent the elution.

In contrast to techniques for partially recycling water treatment plant sludge, techniques for partially recycling bottom ash from thermal power plants, and techniques for partially recycling waste ash, the present invention is directed to a method of recycling waste water sludge, It is possible to reduce the production cost to 40% (up to 70%) level by recycling as a useful resource in industry by utilizing the characteristics of martial arts and so on, thus creating a great economic effect.

In this study, the brick production using the purified sludge disposal, the bottom ash being discarded, and the discarded mulch have been used to reduce the shrinkage ratio, to improve the strength, to show the bright color and to have the characteristics of far infrared rays such as yellow clay, The present invention provides an eco-friendly block in which the radiation effect of far-infrared rays is enhanced by using a material having the above-described structure.

Fig. 1: Diagram of a manufacturing process for obtaining blocks using water treatment plant sludge, bottom ash and parchment.

Before describing the embodiments of the invention for implementing the technical idea of the present application, the terms or words used in the specification or claims of the present application should not be construed as limited to ordinary or dictionary terms, The scope of protection of the present invention should be construed in accordance with the technical idea of the present invention and the examples described in this specification are only the most preferred embodiments of the present invention and do not represent all the technical ideas of the present invention , It is to be understood that various equivalents and modifications may be substituted for those at the time of the present application.

Herein, the characteristics of raw materials used to obtain the block composition of the present invention are as follows, in order to obtain eco-friendly bricks by taking advantage of the properties of waste water treatment plant sludge and waste bottom ash that can not find a proper use place, .

The sludge used in the present invention was the sludge generated in the domestic (A) water treatment plant, and the analysis results of the sludge were as shown in Table 1. The physical and chemical properties of the bottom ash used in the present invention were analyzed as shown in Table 2 below .

 division  Water and organic matter SiO ₂ AL ₂ O ₃ Fe ₂ O ₃  CaO Etc
(Other than TiO ₂ )  system unit(%)  21.4  36.3  28.9  6.9  2.1  4.4  100

division
Physical Characteristics  Chemical composition (%) Powder figure
(Cm < 2 > / g) density
(Kg / m3) SiO ₂ Al ₂ O ₃ Fe ₂ O ₃ CaO MgO K ₂ O
Na ₂ O SO ₃ Bottom ash 6,450 2.3 47.7 25.1 5.7 0.6 0.7 3.3 0.5 0.1 Balance

In order to confirm the possibility that the block composition to which the technical idea of the present application is applied is securing the durability by securing the constant strength for a long time, various preparation examples are applied in addition to the examples shown in the composition of Table 3 below, Table 3 shows the optimal model in which the technical idea of the present invention is realized through the experimental procedure according to the error method.

In the comparative sample 1, the water treatment sludge and the bottom ash, which are the main raw materials of the present invention, were mixed in a ratio of 6: 4 And the comparison sample 2 was used in the ratio of 2: 8 of the water treatment plant sludge and the bottom ash, and the application example in which the strength reinforcing agent was not used was compared with the technical composition of the present invention Respectively.

The composition shown in Table 3 is one application example. In case of Sample 1, 6.0 kg of bottom ash is introduced into 4.0 kg of water purification plant sludge having the analysis result of Table 1 in Mixing Mixer 1, and the mixture of CaO (H ₂ O) to induce a hydraulic reaction product is performed for 1 hour, and the whole amount of the hydraulic reaction product obtained in the first step is pulverized to a size ranging from 0.5 to 3.0 mm 4.3 kg of crushed mats were added, mixed and intermittently agitated for aging for 5 hours. 7.2 kg of loess and 7.2 kg of sand and magnesium oxychloride (magnesium oxychloride) mixed with magnesium chloride were added to the aging reaction product. , MOC) 1.3 kg of reinforcing agent is injected into a block composition. Water is added and mixed and stirred. The sample 2 was applied in the same manner as in the above sample 1, and was weighed in different amounts according to the compositional table in Table 3, and 1.6 kg of MOS as the strength reinforcing agent was injected And sample 3 was applied in the same manner as Sample 1 above and weighed in different amounts according to the composition table in Table 3 and 1.1 kg of magnesium phosphate (MAP) as an intensifier was injected to prepare a sample Three products were obtained, and Comparative Examples 1 and 2 were prepared in the same manner. Experiments were carried out on bending strength and compressive strength of each sample product.

For example, magnesium stearate (MOC) used in the present invention is prepared by mixing magnesium oxide (MgO, light, quartz puree) and magnesium chloride hexahydrate (MgCl ₂ .6H ₂ O, Magnesium oxychloride (MOC) fixing agent was prepared and used, and magnesium oxysulfate (MOS)

Magnesium oxysulfate (MOS) binders were prepared by mixing magnesium oxide (MgO, light) and magnesium sulfate heptahydrate (MgSO ₄ · 7H ₂ O) in a weight ratio of 1: 1 , And magnesium phosphate (MAP)

Magnesium phosphate (MAP) was prepared by mixing light magnesium oxide (MgO, light) and sodium phosphate monobasic (NaH ₂ PO ₄ ) in a weight ratio of 1: 1, The bending strength of the product was measured by KS F 2407, the compressive strength was measured by KS F 2403, the compressive strength after freezing and thawing test was measured by KS F 2456 / KS F 2403, (2 hours / 60 ° C), maintenance (4 hours / 60 ° C) and warming (2 hours / 20 ° C). The results are shown in Table 3.

 division  Sample 1  Sample 2  Sample 3  Comparative Sample 1  Comparative Sample 2 Water treatment plant sludge  4.0  5.0  3.0  6.0  2.0   Bottom ash  6.0  5.0  7.0  4.0  8.0  Asparagus  4.3  4.0  4.5  5.0  5.0 ocher  7.2  7.0  7.4  7.5  7.5  sand  7.2  7.4  7.0  7.5  7.5
Strength reinforcement
 MOC  1.3  MOS  1.6  MAP  1.1   Sum  30.0  30.0  30.0  30.0  30.0  Flexural strength 28 days (N / mm2)  2.24  1.98  1.92  1.28  1.06 Compressive strength (N / mm 2) (1)  21.4  20.2  19.6  16.4  12.8 Compressive strength (N / mm < 2 >) (2) 26.8 24.5 23.7  18.2 10.4 Compressive strength (N / mm2) (3) 20.2 19.8 18.6  8.6 6.4

As a method of applying the technical idea of the present invention to the field, there is a method in which a primary mixer and a secondary mixer are structured as shown in FIG. 1, and a primary mixer is provided with a water treatment plant The mixing and stirring process for inducing the hydraulic reactants are performed for 1 hour, and the water content (H ₂ O) in the sludge reacts with the CaO component contained in the bottom ash through the non-beam process in which the bottom ash is first introduced into the sludge. To 0.5 to 3.0 mm in size, and the resulting crushed mallow was added to the mixture, followed by intermittent agitation and aging for 5 hours. In the secondary mixer, the loess and sand or the glass passing through the 19 mm sieve A magnesium oxide-based strength reinforcing agent selected from MOC, MOS, and MAP to be mixed with an elvan or a farpite powder having a far-infrared radiation effect, Mixed with the first mixer contents before compression process to the slave by the press can be applied in a way to get the brick by performing the compression process by the press.

As a method of applying the technical idea of the present invention to the field, there is a method in which a primary mixer and a secondary mixer are structured as shown in FIG. 1, and a primary mixer is provided with a water treatment plant The mixing and stirring process to induce the calcium carbonate (CaCO ₃ ) -containing reactant reacts with the CaO component contained in the bottom ash and the water (H ₂ O) in the sludge reacts with the bottom ash in the sludge first And then milled to a size in the range of 0.5 to 3.0 mm. The resulting marmalite was added, mixed, intermittently stirred, and aged for about 5 hours. In the secondary mixer, loess and sand or 19 mm And a magnesium oxide-based strength reinforcing agent selected from MOC, MOS, and MAP to be mixed with a quartz or perlite powder having far-infrared radiation efficiency Were mixed were mixed and a first mixer contents before the compression process to the final press can be applied in a way to get the brick by performing the compression process by the press.

The composition of the raw materials of Sample 1 to Sample 3 shown in Table 3 shows the best mode to which the technical idea of the present application is applied, As a result obtained from the result, it is obvious that the technical idea of the present invention is not limited thereto, and the technical idea of the present application should be protected by the claims.

FIG. 1 is a view illustrating a manufacturing process for obtaining a block using a water treatment plant sludge, bottom ash, and mulch;

Claims (4)

A method of manufacturing an environmentally friendly brick using purified water sludge,
Bottom ash obtained as a by-product in a thermal power plant is mixed with water treatment plant sludge having a water content in the range of 15 to 25%, but water treatment sludge and bottom ash are mixed at a ratio of 40 ± 10: 60 ± 10 parts by weight, A first step of reacting with water (H ₂ O) in the sludge to obtain a hydraulic reaction product;
A second step of mixing 70 ± 10 parts by weight of the hydraulic reaction product obtained in the first step in a range of 30 ± 10 parts by weight with respect to matured components and aging in a range of 2 to 6 hours;
25 to 5 parts by weight of loess and 50 to 5 parts by weight of general aggregate or sand are mixed with 50 to 10 parts by weight of the aged reaction product obtained through the second step and pressed to obtain a block product for use as a brick or barrier Step 3;
And removing the sludge from the sludge tank. The method according to claim 1,
In the third step, the raw material selected from ordinary aggregate or sand other than quartz and pearlite is added in a ratio of 10 ± 5 parts by weight and mixed, followed by compression with a press. Gt; The method according to claim 1,
Magnesium oxychloride (MOC) made by mixing magnesium oxide and magnesium chloride in addition to ordinary aggregate or sand in the third step, magnesium oxysulfate (MOS) mixed with magnesium oxide and magnesium sulfate, A magnesium oxide-based fixing agent selected from magnesium phosphate (MAP) mixed with magnesium oxide and ammonium phosphate solution is added in an amount of 20 ± 10 parts by weight as an intensifier, followed by pressing with a press Wherein the method is applied to the block using the purified sludge. In an eco-friendly block provided using purified water sludge and bottom ash,
Bottom ash obtained as a by-product in a thermal power plant is mixed with water treatment plant sludge having a water content in the range of 15 to 25%, but water treatment sludge and bottom ash are mixed in a ratio of 40 ± 10 to 60 ± 10 parts by weight, A first step of reacting with water (H ₂ O) in the sludge to obtain a hydraulic reaction product and
A second step of mixing 70 ± 10 parts by weight of the hydraulic reaction product obtained in the first step in a range of 30 ± 10 parts by weight with respect to matured components and aging in a range of 2 to 6 hours;
25 ± 5 parts by weight of loess and 50-5% by weight of raw materials selected from ordinary aggregate, sand, elvan, and perlite are mixed with 50 ± 10 parts by weight of the aged reactant after the second step, Wherein the first block is an eco-friendly block.

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