KR20230129088A - Pellet Ash Manufacturing Apparatus For Concrete Admixture Using Biomass And Combustible Domestic Waste, Manufacturing Method Thereof, And Use Of Pellet Ash - Google Patents

Abstract

Disclosed are a precast concrete manufacturing apparatus using heat and incineration ash produced from biomass and combustible municipal waste, a manufacturing method thereof, and a concrete product.
The disclosed precast concrete manufacturing apparatus using heat and incineration ash produced from biomass and combustible municipal waste, manufacturing method thereof, and concrete products are pellets after coarsely pulverizing biomass such as agricultural and forestry by-products, and then drying with coffee grounds. Various starch meal, starch, brewer's meal, ginseng meal, sugarcane by-products (Bagasse), etc., which are combustible household wastes containing sugar, are mixed and burned in the incineration ash generated through the combustion of fuel pellets and flammable waste formed in the molding machine The incineration ash obtained after the process is used as an admixture for making concrete, and steam generated from the boiler when biomass and domestic waste are burned operates a steam turbine that produces electricity, and steam waste heat from the steam turbine is recovered It can be used as heat energy for concrete curing.

Description

Pellet Ash Manufacturing Apparatus For Concrete Admixture Using Biomass And Combustible Domestic Waste, Manufacturing Method Thereof, And Use Of Pellet Ash}

The present invention relates to a pellet ash manufacturing apparatus for concrete admixture using biomass and combustible domestic waste, a manufacturing method thereof, and a use of the pellet ash.

In particular, high calorific value pellets using biomass such as agricultural and forestry by-products, starch, starch meal, and flammable household waste such as coffee grounds (coffee waste) are used to generate power, and the heat and pellet ash produced during the power generation process are used to manufacture concrete products. It relates to a pellet ash manufacturing device for concrete admixture using biomass and combustible domestic waste, which is used as a part of the admixture to be used as a part of the admixture, a manufacturing method thereof, and the use of the pellet ash.

Due to the recent shortage of landfills in the metropolitan area, it is expected that landfills for waste disposal in the metropolitan area will reach saturation within 2027, and various media are citing data from environmental agencies and related specialized research institutes.

Accordingly, in order to slow down the saturation of landfills, direct landfilling of domestic wastes in the metropolitan area will be prohibited from 2026, and from this time on, recyclables must be sorted out of household wastes in volume-rate bags, and in landfills, wastes remaining after sorting must be incinerated, and only the remaining incineration ash must be buried. do. Patent Publication No. 10-2021-0157362 is a power generation system using pyrolysis renewable fuel produced from waste (synthetic resin, livestock manure, wood, marine waste, food) and a smart farming system that applies waste heat from the power generation system to breeding insects.

However, as of 2020, 750,000 tons, or 25% of the 3 million tons of waste brought into landfills in the metropolitan area, are directly landfilled. Therefore, even if the Direct Landfill Prohibition Act is enforced, an astronomical amount of incineration ash is still expected to be landfilled, and coffee grounds are representative of household waste. With the explosive increase in domestic coffee consumption, about 150,000 tons of coffee grounds were generated as of 2019. A study by Lim Nam-woong in 2007 showed that it is possible to mix concrete using incineration ash from an existing incineration plant.

However, in the case of mixing concrete using incinerated coffee grounds as an admixture, when coffee grounds ash replaced about 10% of binders such as cement, concrete mixing was not possible. It was confirmed that the absorption rate was very high to the extent that it was also impossible to mix after ultrafine grinding as follows.

Therefore, since coffee consumption continues to increase, coffee grounds will be included in the incineration plant's incineration plant. Therefore, in order to make concrete products using incineration plant's incineration plant in the future, this development of a concrete mixing method using coffee grounds ash is a precedent. It should be.

On the other hand, current solid biomass fuels such as wood pellets with low ash generation and high calorific value are in the spotlight due to combustion efficiency and waste disposal problems. Patent Registration No. 10-2336175 'elastic molding device using agricultural by-products' and the like.

However, agricultural by-products with low calorific value and large amount of ash are neglected and burned in the open field in large quantities, and fine dust is also causing many environmental problems.

Therefore, if biomass such as agricultural and forestry by-products and combustible domestic waste such as coffee grounds can be used as raw materials for concrete mixing, by recycling incineration ash generated from agricultural by-products and combustible domestic waste It will be able to help solve the domestic waste problem, and by using the dust collector in the incineration plant, it will be possible to reduce the fine dust problem caused by open-site incineration.

In addition, it is expected that energy efficiency can be improved by supplementing the low calorific value of various agricultural and forestry by-products and combustible municipal waste with the relatively high calorific value of coffee grounds. Confirmed from 'Evaluation of energy content of coffee grounds' (Yong Sang-un et al., Korea Waste Recycling Society, 2017) and 'Characteristics of spent coffee grounds as a fuel and combustion test in a small boiler' (Kang Sae-byeol et al., Renewable Energy, 2016) do.

KR Patent Publication No. 10-2021-0157362 KR Patent Registration No. 10-1187581 KR Patent Registration No. 10-2336175

- Recycling of floor ash generated from incineration plants as fine aggregate for concrete, Nam-woong Lim, Korean Society of Resource Recycling, 2007 - Evaluation of energy content of food waste and coffee grounds' (Yong Sang-un et al., Korea Waste Recycling Society, 2017 - Characteristics of spent coffee grounds as a fuel and combustion test in a small boiler, Kang Sae-byeol et al., Renewable Energhy, 2016

The present invention was developed through careful research to supplement the problems of the prior art and provide various additional advantages, and pellets using biomass such as agricultural and forestry by-products, starch and starch meal, and coffee grounds ( By using combustible domestic waste such as coffee grounds) as a fuel for generating electricity and heat, minimizing the landfill amount of biomass and household waste, and also allowing the ash generated from it to be used as a raw material for cement admixtures, A concrete admixture using biomass and combustible household waste that enables reduction of carbon emissions corresponding to the reduction in cement production and economic feasibility of using waste heat generated in the power generation process as thermal energy for concrete curing. It is an object of the present invention to provide an apparatus for producing pellet ash for use, a manufacturing method and a use thereof.

The above object is achieved by a pellet ash manufacturing device for concrete admixture using biomass and combustible municipal waste, and a manufacturing method and use thereof provided according to the present invention.

Pellet ash manufacturing apparatus for concrete admixture using biomass and combustible domestic waste provided according to one aspect of the present invention is bio A crushing unit composed of a first crusher for densely crushing any one or two or more of the masses into a predetermined size and a second crusher for densely crushing combustible household waste such as coffee grounds; A first dryer for drying the pulverized raw material pulverized by the first and second pulverizers to adjust moisture for compressing and molding into pellets, and drying only pulverized pulverized by the second pulverizer for high combustion efficiency a drying unit composed of a second dryer; A pellet forming unit for forming pellets of a predetermined size using the pulverized water whose moisture content is adjusted by the first dryer; A pellet cooling unit for cooling the pellets to maintain the strength of the fuel pellets formed in the pellet forming unit; The fuel pellets passed through the pellet cooling unit and the coffee grounds, which are combustible wastes passed through the second dryer, are directly burned in the combustion device of the boiler, and the steam turbine is operated with the heat generated at this time to generate power or to solid fuel gasifier with pellets and A power generation unit generating power by operating the gas turbine with fuel obtained by pyrolysis or plasma gasification of coffee grounds and operating the steam turbine again with exhaust heat discharged from the gas turbine; A post-combustion unit for burning the unburned pellet incineration ash for complete combustion of the unburnt pellet incineration ash remaining in the pellet incineration ash generated in the boiler combustion unit; And a post-grinding unit that cools the pellet incineration ash passing through the post-combustion unit to a predetermined temperature and then pulverizes to obtain only fine-grained pellet ash.

The pellet ash manufacturing apparatus is characterized in that it includes a curing unit configured to supply waste heat discharged from the power generation unit for curing concrete produced by using the pellet ash as a part of the admixture.

The exhaust gas discharged from the pellet incineration in the power generation unit filters out dust through a cyclone dust collector, desulfurizes through a semi-dry reactor (SDR), passes through a bag filter to filter out fine dust, and then waits It is characterized in that it is released into the middle.

The power generation unit is provided with a heat exchanger, a condenser, and a pump, and the heat generated in the steam turbine is recovered from the heat exchanger, sent to the curing unit through the steam production unit, and returned to water by the condenser connected to the heat exchanger. Turning is characterized in that it is supplied to the boiler combustion device for operating the steam turbine again through the pump and circulated.

The water content of the pulverized material dried by the first dryer is characterized in that it is maintained at 10 to 15% for pellet moldability.

The pellets molded by the pellet forming unit are characterized in that they are molded to have a diameter of 6 mm to 8 mm and a length of 50 mm or more for combustion efficiency of the boiler.

A method for producing pellet ash for concrete admixture using biomass and combustible domestic waste provided according to one aspect of the present invention is a grinding unit composed of a first grinder and a second grinder, and rice hulls and corn cups by the first grinder (Corncob), starch pulp, and agricultural by-products such as cornstalks, either alone or a mixture of two or more are densely pulverized, and combustible household waste such as coffee waste is densely pulverized by the second grinder A crushing step of pulverizing; In order to compress and mold the pulverized material raw material pulverized by the first and second pulverizers in the form of pellets by the drying unit composed of the first dryer and the second dryer, the moisture content of moisture is 10 to 15 a drying step of drying for adjustment to maintain %, and drying only the pulverized material pulverized by the second pulverizer by the second dryer for high combustion efficiency; A pellet forming step of forming pellets having a diameter of 6 mm to 8 mm and a length of 50 mm or more using the pulverized water whose moisture content is adjusted by the first dryer; A pellet cooling step of cooling the pellets to maintain the strength of the fuel pellets formed in the pellet forming step; The fuel pellets passed through the pellet cooling unit and the coffee waste, which is a combustible waste, passed through the second dryer, are directly burned in the combustion device of the boiler, and the heat generated at this time is used to operate the steam turbine to generate electricity or pellets by a solid fuel gasification device. A power generation step of generating power by operating the gas turbine with fuel obtained by pyrolysis or plasma gasification of coffee waste and coffee grounds and operating the steam turbine again with exhaust heat discharged from the gas turbine; A post-combustion step for burning the unburned pellet incineration ash for complete combustion of the unburnt pellet incineration ash remaining in the pellet incineration ash generated in the boiler combustion unit; And a post-grinding step of cooling the pellet incineration ash that has passed through the post-combustion step to a predetermined temperature and then pulverizing to obtain only fine-grained pellet ash.

It characterized in that it comprises a step of curing the concrete for a predetermined time by recovering the waste heat discharged from the power generation unit and then supplying it to the storage space for concrete made of the pellet ash collected through the post-pulverization step.

A concrete product can be manufactured by mixing the cement mixture powder containing at least two types of pellet mixture ash prepared above with an AE water reducing agent containing aggregate, mixing water, and a thickener.

The pellet mixture ash is ash or rice hull pellets, coffee meal pellets, corn cob pellets, and starch meal pellets pulverized after mixing and burning rice hull pellets, coffee meal pellets, and corn cup pellets at a ratio (%) of 7:2:1 6: After mixed combustion at a ratio (%) of 2:1:1, pulverized ash or rice husk pellets, coffee ground pellets, corn starch, and potato starch were mixed and burned at a ratio (%) of 4:4:1:1 and then pulverized. It is characterized by being ash.

The cement mixture powder is 10wt% of rice husk, coffee waste, and corn cup mixed pellet ash or 10wt% of rice hull, coffee waste, corn cob, starch foil mixed pellet ash or 10wt% of rice hull, coffee waste, corn starch, potato starch mixed pellet ash It is characterized in that it is composed by mixing 63 wt% of Portland cement (OPC) and 27 wt% of blast furnace slag powder (BS).

The rice hull pellet ash contains 85.2wt% of SiO2 and 2.9wt% of CaO, The coffee ground pellet ash contained 36.7% SiO2, 19.3% CaO, and 4.4% Al2O3, the corn cup pellet ash contained 48.3% SiO2, 10.8% Al2O3, and 13.9% CaO, and the cornstalk and starch meal mixed pellet ash Silver contains 38.3% of SiO2, 18.9% of CaO, and 7.6% of Al2O3 as constituents, respectively.

It is characterized in that the particle size of each of the rice husk, corn cup, starch meal, corn cob, and bean cob pellet ash is 31.4 μm or less.

The concrete slump flow is characterized in that any one of 395 ~ 590mm.

According to the following embodiment of the present invention, biomass such as agricultural and forestry by-products and combustible household waste such as coffee grounds (coffee waste) are used as admixtures necessary for the production of concrete. To prevent environmental pollution by minimizing the amount of waste landfill give effect

In addition, the use of an admixture instead of biomass as part of the cement content of coffee grounds incinerated ash, such as coffee grounds, gives the effect of reducing carbon emissions as much as reducing cement production, and at the same time, the strength of concrete also increases the strength of existing concrete. Gives an effect that expresses the same intensity as

In addition, the mixing of coffee grounds having excellent water absorption characteristics also gives an effect of enhancing concrete mixing workability for combustible waste incineration ash, which cannot be mixed with concrete.

1 is an overall configuration diagram of a pellet ash manufacturing apparatus for concrete admixture using biomass and combustible municipal waste according to the present invention;
2 is a configuration diagram explaining a power generation process by a combustion device different from the combustion device shown in FIG. 1;
3 is a diagram embodying the power generation unit of FIG. 2;
Figure 4 is a graph showing that the energy use of the power generation unit of Figure 2 is efficient,
5 is a SEM picture of the coffee ground pellet ash used in the present invention,
6 is a SEM picture of the rice hull pellet ash used in the present invention,
7 is a SEM picture of the corn cup pellet ash used in the present invention,
8 is a SEM photograph of a mixed pellet ash of cornstalk and starch meal used in the present invention,
9 is a coffee waste pellet ash obtained by removing pulverized coal using a furnace,
10 is a photograph of a mortar flow test using the coffee pellet ash from which the pulverized coal of FIG. 9 is removed,
11 is a photograph of the coffee waste pellet ash obtained by pulverizing the coffee pellet ash by mixing 1 mm and 3 mm alumina balls using a ball mill,
12 (a) is a photograph showing clinker formed by heating at 1000 degrees Celsius for 1 hour in a furnace to minimize porosity, and (b) is a photograph of coffee pellet ash coarsely pulverized with a hammer mill.
13 is a SEM photograph of the coffee pellet ash ground by an ultrafine particle grinder,
14 is a photograph of a slump flow test of concrete in which cement is replaced (approximately 10%) with cone cup pellet ash,
15 is a photograph of a slump flow test of concrete in which cement is replaced (approximately 10%) with cornstalk and starch meal mixed pellet ash,
16 is a photograph of a slump flow test of concrete in which cement is replaced (approximately 10%) with coffee grounds, rice hulls, and corn cup mixed pellet ash,
17 is a photograph of a slump flow test of concrete in which cement is replaced (approximately 10%) with coffee grounds, rice hulls, corn cob, starch, and starch foil mixed pellet ash.
18 is a photograph of a slump flow test of concrete in which cement was replaced (approximately 10%) with a mixed ash of coffee waste and rice hull pellets, corn starch, and potato starch,
19 is a graph of slump flow test results of concrete in which cement is replaced (approximately 10%) with agricultural by-products and coffee ground ash,
20 is a test result of compressive strength of concrete in which cement is replaced (approximately 10%) with agricultural by-products and coffee ground ash,
21 is a result of STA-GC-MS measurement of coffee ground pellet ash,
22 (a) and (b) are photographs showing standard yarn and crushed sand, respectively.

Prior to the description of the present invention, the following specific structural or functional descriptions are only exemplified for the purpose of explaining embodiments according to the concept of the present invention, and embodiments according to the concept of the present invention may be implemented in various forms, , should not be construed as being limited to the embodiments described herein.

In addition, since embodiments according to the concept of the present invention can be made with various changes and can have various forms, specific embodiments will be illustrated in the drawings and described in detail herein. However, this is not intended to limit the embodiments according to the concept of the present invention to a specific disclosed form, and should be understood to include all modifications, equivalents or substitutes included in the spirit and scope of the present invention.

In addition, the configurations of the present invention are to be interpreted in the same range as not only direct contact or connection, but also contact or connection through other configurations between configurations.

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

Referring to FIGS. 1 to 4, a pellet ash manufacturing apparatus 100 for concrete admixture using biomass and combustible domestic waste according to the present invention and a manufacturing method thereof will be described together. Reference numerals according to the manufacturing method are also written together in the drawing of the manufacturing device to help understanding.

<Crushing unit: 110 (crushing step: S1)>

The crushing unit 110 includes a first crusher 112 and a second crusher 114, and the first crusher 112 removes rice hulls from agricultural and forestry by-products and combustible waste such as coffee grounds stored in the warehouse. , Corncob, starch pulp, rice straw, soybean stalks, and agricultural by-products such as corn stalks, and any one or two or more of biomass, such as pulverized densely into a predetermined size, and combustible waste such as coffee waste Household waste is densely pulverized by the second shredder 114 .

The crushing unit 110 is composed of a crusher such as a normal hammer mill. In the case of relatively large-sized raw materials such as rice straw, bean stalks, and corn stalks among agricultural by-products, the first grinder 112 It is preferable to supply by pulverizing to a predetermined size in advance so that the pulverization by the

In the case of combustible waste such as coffee waste, pellet-type refuse derived fuel (RDF: Refuse Derived Fuel) is coarsely pulverized to a moldable size or coarsely pulverized to the level of non-shaped fuel (Fluff) that can be burned immediately. Coarsely pulverized combustible waste is pulverized into RDF molding raw material or Fluff according to use.

<Pulverized material drying unit: 120 (drying step: S2)>

The drying unit 120 also includes a first dryer 122 and a second dryer 124, and the first dryer 122 converts the pulverized raw material pulverized by the first and second pulverizers 112 and 114 into pellets. In order to prevent great difficulty in compression molding, the pulverized raw material is dried so that the moisture content contained in the raw material is maintained in the range of 10% to 15%, and the second dryer 124 crushes the flammable waste pulverized by the second pulverizer Only water is dried without moisture adjustment to improve combustion efficiency.

However, when agricultural by-products such as rice hull, rice straw, corncob, starch pulp, corn stalks, and bean stalks and combustible wastes such as coffee waste are stored in a dry state, agricultural by-products are stored in the drying unit 120. Prior to the moisture adjustment operation by artificially adding moisture, the moisture content may be maintained in the range of 10% to 15%.

Adjusting the moisture content of the pulverized raw material in the range of 10% to 15% is to facilitate compression molding of the pulverized material in the form of pellets in the pellet forming unit 130 to be described later. If the water content of the pulverized raw material is less than 10%, it is difficult to compress the pulverized material in the form of pellets due to insufficient moisture, and if the moisture content exceeds 15%, due to excessive moisture. The drying unit 120 may be configured as a heater or a warm air fan capable of supplying heat or warm air required for drying moisture.

<Pellet forming unit: 130 (pellet forming step: S3)>

The pellet forming unit 130 mixes potato or corn starch prepared in advance with the pulverized raw material whose moisture content is adjusted to increase the combustion efficiency of the pellets, the particle diameter is 6 mm to 8 mm, and the length is 50 mm or more. to form fuel pellets. The reason why the length of the fuel pellets is 50 mm and the particle diameter is in the range of 6 mm to 8 mm is to improve the combustion efficiency of the pellets in the boiler combustion device. The pellet forming unit 130 is composed of a normal molding machine.

<Pellet cooling unit: 140 (pellet cooling step: S4)>

The fuel pellets molded in the pellet forming unit 130 pass through the pellet cooling unit 140 to receive low-temperature cold air. The reason for this is to ensure that the pellets for fuel molded to a predetermined size have a cohesive force that maintains strength without being easily broken. The pellet cooling unit 140 is composed of a normal cooler.

<Development unit: 150 (Development stage: S5)>

The power generation unit 150 is connected to the pellet cooling unit 140 and the second dryer 124 of the drying unit 120, thereby supplying pellets for fuel that have passed through the pellet cooling unit 140 and the drying unit 140. The coffee waste dry fuel, which is a combustible waste that has passed through the second dryer 124 of the unit 120, is directly burned in the combustion device 151 of the boiler, and the steam turbine 152 is operated with the heat generated at this time to produce the necessary power let it The power generation unit 150 includes a heat exchanger 155, a condenser 156, and a pump 157, and the heat generated in the steam turbine 152 is transferred from the heat exchanger 155 to the waste heat recovery unit 191. ) After recovery by steam production unit 192, it is sent to the curing unit 190 to be described later through the steam production unit 192, and on the other hand, the condensed water returned to water by the normal condenser 157 associated with the heat exchanger 155 is pumped. Through 157, it is supplied to the boiler combustion device 151 for operating the steam turbine 152 again.

In addition, the boiler combustion device 151 of the power generation unit 150 includes a dust collector 158-1, a semi-dry reactor (SDR) 158-2, and a bag filter 158-3. and a desulfurization facility 158 to filter out dust from the exhaust gas discharged during pellet fuel incineration by the cyclone dust collector 158-1, and the exhaust gas passing through the cyclone dust collector 158-1 is returned again. After desulfurization through the desulfurizer (SDR: Semi-dry reactor) 158-2, the fine dust is filtered out again by passing through the bag filter 158-3 and then released into the air, thereby reducing air pollution By minimizing it, you can contribute to maintaining a clean environment.

The combustion device 151 of the boiler constituting the power generation unit 150 in the above may be configured and used as any one of a conventionally used stocker type combustion device, a rotary furnace type combustion device, and a fluidized bed type combustion device according to a combustion method. The stocker type (grate type) combustion device consists of three parts: a drying zone for sufficient drying before combustion, a combustion zone that generates flames and causes an active oxidation reaction at high temperature, and a post-incineration zone that completely incinerates unburned components in the incineration ash. There are typically two types of stalking, the cascading stalker and the chain stalker.

The rotary furnace type combustion device is a device that burns fuel while stirring and transporting it by rotating a cylindrical combustion furnace. Since the residence time of the fuel in the combustion furnace is long, appropriate agitation is possible according to the low-speed rotation of the combustion furnace, and the transfer speed control range of the fuel is easy, it is a method that is easy to perform post-incineration to remove unburned components. Therefore, it can be applied to the post-combustion process when removing unburned substances after combustion by the stocker type method.

The fluidized bed combustion device is a method of forming a fluidized bed using a fluidized medium such as silica sand (sand) heated to 600 degrees Celsius or more and supplying fuel to the fluidized bed for combustion. It is a combustion device that can lower sulfur oxides and nitrogen oxides without adding a separate device with low combustion temperature and direct injection of desulfurization agent.

The power generation unit 150 has described a configuration in which fuel pellets are directly put into the combustion device 151 of the boiler and burned, and then the steam turbine 152 is operated with the heat energy generated at this time to generate electric power. , It is possible to produce power by configuring the power generation unit 150a as shown in FIG.

2 is a block diagram illustrating a power generation process by another combustion method in a precast concrete manufacturing apparatus using agricultural by-products according to the present invention, and FIG. 3 is a detailed view of the power generation unit of FIG. 2.

As shown in the drawing, the power generation unit 150a thermally decomposes or plasma-gases the fuel supplied from the second dryer 124 and the pellets for fuel supplied from the cooling unit 140, and then generates electricity with gas combustion energy at this time. It is a development component that produces That is, after thermal decomposition or plasma gasification of pellet fuel using a conventional solid fuel gasifier 151a, which is a gasification facility, a generator by operating a gas turbine 153a associated with the solid fuel gasifier 151a ( 154a) In addition to the operation, the steam turbine 152a is operated using the exhaust heat from the exhaust heat recovery boiler 155a operated by the exhaust heat from the gas turbine 153a to operate the generator generator 154a. It is a combined thermal power method.

In other words, by using a gas turbine, in addition to steam turbine power generation using a Rankine cycle, a Bryton-Rankine combined cycle using up to the Bryton cycle of a gas turbine operated with pellet fuel gas by the solid fuel gasifier 151a It is configured to produce more efficient power by power generation, which can be confirmed from the graph of FIG. 4 .

Like the power generation unit, the gas generator 150a is provided with a heat exchanger 156a, so that heat generated in the heat exchanger 156a can be recovered and sent to a concrete product curing room to be described later. On the other hand, the condensed water returned to water after being cooled by a conventional condenser 157a associated with the heat exchanger 156a is connected to the gas turbine 153a and the steam turbine 152a through the pump 158a. It was sent to the recovery boiler (155a) to form a circulation cycle that could be used for power generation.

As the gasification method of the solid fuel gasifier 151a, a method using incompletely burned synthesis gas using pyrolysis and a plasma gasification method using a microwave plasma torch may be configured.

<Post Combustion Unit: 160 (Post Combustion Step: S6)>

The boiler combustion device 151 for complete combustion of the unburned pellet incineration ash remaining in the fuel pellet incineration ash generated by the boiler combustion device 151 of the power generation unit 150 (or power generation unit 150a) After being linked with, it passes through the combustion unit 160 to burn the unburned pellet incineration ash once again.

The post-combustion unit 160 is a process of completely burning the unburned components remaining in the incineration ash generated after combustion in the combustion device 151 of the boiler. In order to completely burn the unburned components, a predetermined temperature must be maintained. Since the heat generation is smaller than that of the combustion device 151 of the boiler, it is necessary to increase combustion efficiency by supplying an appropriate amount of air for combustion in order to prevent unburned components from being cooled before complete combustion.

<Post grinding unit: 170 (post grinding step: S7)>

The pellet incineration ash completely combusted through the post-combustion unit 160 is cooled to remove heat and then connected to the post-combustion unit 160 to fine granularity through the crushing unit 170. It is pulverized to obtain only pellet ash. The method of obtaining pure pellet ash is to remove unbrimmed ash from the pellet ash pulverized in the grinding process by using the difference in density between unbrimmed ash and unbrimmed ash using a normal dry and wet process. let it be The post-grinding unit 170 is composed of a conventional crushing mill.

<Concrete product forming unit: 180 (concrete product forming step: S8)>

The pellet ash obtained through the post-grinding unit 170 is mixed with cement, aggregate, etc. in an appropriate ratio as a part of the admixture (refer to the mixing ratio described later), and the mixture is mixed with the concrete product forming unit 180. ) into a common mold to form various concrete products having a certain strength.

<Concrete product curing unit: 190 (concrete product curing step: S9)>

The waste heat discharged from the power generation unit 150 (or (150a)) is immediately recovered to form an enclosed space of a predetermined width in which the concrete products molded in the concrete product molding unit 180 are placed. Concrete product curing unit ( 190), so that heat necessary for curing the concrete product molded in the concrete product forming unit 180 can be supplied. Taking advantage of the fact that waste heat of 60 degrees Celsius or more is constantly produced while the power generation unit 150 is operating, the curing room can be maintained at 60 degrees Celsius or more at all times, and the curing time of concrete products in the curing room is an average of 12 per day It is desirable to be able to carry out over an hour (refer to the curing test described later).

Tables 1 and 2 below show the calorific value of biomass raw materials such as agricultural and forestry by-products and combustible municipal waste that can be used in the apparatus of FIG. 1 according to the embodiment of the present invention.

division designation Calorific Value (Kcal/kg) Ash content (%) Agriculture
by-product

chaff 3616 33 rice straw 3735 15.5 barley straw 3653 5.7 Beanstalk 4044 5.54 rapeseed 3970 6.6 pine nut by-product 4385 1.5 Peanut By-product 4660 0.3 cotton swab 3958 3 Bagas (sugar cane by-product) 4330 1.73 corn cob 3500 1.4 coconut shell 4000 4.14 Coconut Stalk 4650 2.5 macadamia nut shell 5200 0.56 walnut shell 4351 0.71 almond shell 3690 7.2 coffee husk 4231 4.6 Cassava by-product 4000 0.2 peach seed 4647 1.1 Pastachio Shells 4608 1.13 hazelnut shells 4617 1.4 corncob 4258 3.7 cottonseed hull 3915 14.6 straw 4067 13.5 sugarcane leaves 4165 7.7 water hyacinth 3542 10.8 tea by-product 4091 1.4 Castor Seed Byproduct 5026 6.9 olive by-product 4685 1.1 wheat processed by-products 3870 15.1 rapeseed 3834 oats 3849 palm seed hull 4500

division designation Calorific Value (Kcal/kg) Ash content (%) Forestry Busan
water and
forestry grass 3768 - silver grass 3790 - ginkgo leaf 3975 - oak leaves 3975 - juniper trunk 4116 - Senna leaf 4336 17.3 wood chips 4765 0.1 pine needles 1364 77.7 american cedar 4957 0.36 pine tree 4945 5.27 fir 4809 1.5 Lukinarukosipala 3986 One dog pine 5287 1.2 eucalyptus 4750 0.72 olive twig 4473 1.02 mulberry branch 4391 2.1 Moringa leaves 3405 21.5 tea 4747 1.7 Sarasu tree seed bark 4928 9.4 bamboo by-product 3801 16.5 Janggu Rice Tree 0.3 43.06 locust tree 4818 10.04 Madron 4497 One manzanita 4516 One Bud tree 4537 23.78 Rigida Pine 4823 0.77 weight tree 4503 2.57 brown oak 4276 2.44 Punggae tree 4429 3.3 cherry 4508 0.69 german spruce 5016 0.7 Quercus Oak 4625 1.86 rowan 4673 1.55 painter 4651 0.9 Arborvitae 5038 7.55 chestnut 4802 6.27 oak tree 5041 3.32 metasequoia 4584 5.29 combustible life
waste coffee grounds 4779 7.2 and below SRF (Solid Refuse Fuel) 3500 less than 20

<Analysis of characteristics of incineration ash of combustible waste and characteristics of coffee waste pellets and agricultural by-product ash> A concrete mixing test was conducted using incineration ash collected in Seoul and Gyeonggi Province (for combustible waste, refer to Nam-Woong Lim's 2007 study). At this time, the chemical composition ratio of the incineration ash used is shown in Table 3 below.

It is preferable to mix concrete using coffee waste ash, which cannot be directly landfilled according to the Direct Landfill Prohibition Act. Therefore, in order to analyze and evaluate the physical and chemical properties of the concrete in which the coffee waste ash used in the present invention is mixed, the present invention collected and used coffee waste generated from a large domestic coffee franchise company E. The chemical composition ratio of the coffee ground pellet ash through XRF is shown in Table 4 below. 5 is a SEM picture of a coffee ground pellet ash.

As shown in Table 4, it is confirmed that the remaining coffee waste ash contains 2.1% of SiO2, 19.3% of CaO, and 4.4% of Al2O3 as components, so that potential hydraulic properties by SiO2 and primary hydration by CaO can be fully expected. there is.

However, since alkaline substances such as K2O and P2O5 account for 36.7% and 16.7%, respectively, it may cause a decrease in relative strength, so it is necessary to be careful when mixing concrete.

The rice hull, corn cup pellet ash and cornstalk starch meal mixture pellet ash according to the agricultural by-products used in the present invention are processed from materials obtained through domestic H company, and the chemical composition ratios of these ash through XRF are shown in the following tables (5 to 7). 6-8 are SEM pictures of these pellet batches.

Tables 5 and 6 (SEM pictures of rice hull pellet ash), Tables 6 and 7 (SEM pictures of corn cup pellet ash), Tables 7 and 8 (SEM pictures of corn cobs and starch foil mixed pellet ash) As shown, in the case of rice husk, 85.2% of the components are SiO2, which can be expected to have latent hydraulic properties, and agricultural products containing sugars such as corn cups, starch meal, and corn cobs also contain latent hydraulic materials such as SiO2 and Al2O3 and large amounts of CaO. Therefore, it can be seen that there is an effect of strength development by primary and secondary hydration reactions.

A. Mortar test of coffee ground ash

For the mortar mixing test using the coffee waste ash used in the present invention, as shown in FIG. 9, after burning the coffee waste pellets, the ash was pulverized, and then the pulverized coal was removed using a furnace.

10 wt% of coffee pellet ash thus obtained was mixed with 181 wt% of fine aggregate and 1.2 wt% of admixture to a cement mixture powder raw material composed of 63 wt% of Portland cement (OPC) and 27 wt% of blast furnace slag powder (BS). Mixing test was conducted.

The cement used at this time was Halla Cement's CEM PILE cement, the fine aggregate was crushed sand from Company H in Gapyeong-gun, Gyeonggi-do, and the admixture was polycarboxylic acid-based AE water-reducing agent with the addition of a thickener from Dongnam Enterprises.

As a result of the mixing test, even if the mixing water was continuously added as shown in FIG. 10, it was impossible to measure the slump flow, and it was impossible to manufacture concrete products because it did not have workability. Accordingly, as shown in FIG. 11, pulverization was performed using a ball mill for 72 hours, but agglomeration of ash occurred and mixing was not possible.

Therefore, as shown in FIG. 12, after heating at 1000 degrees Celsius for about 1 hour in a furnace to make clinker, a mixing test was performed by pulverizing, but as shown in FIG. 10, concrete mixing with workability was not possible.

In this way, the impossibility of concrete molding of coffee pellet ash was determined to be due to the porosity peculiar to coffee pellet ash, and ultra-fine grinding was performed to a level of 2 microns or less. As shown in FIG. 21, as a result of STA-GC-MS measurement at 850 degrees Celsius, ball mill grinding was difficult because the coffee pellet ash absorbs moisture so well that it quickly retains moisture even after going through the pulverized coal removal process in a furnace at 800 degrees Celsius or more.

Therefore, as shown in FIG. 13, the pulverized using an ultra-fine particle grinder was used for the mixing test, but similarly, concrete mixing was not possible.

B. Slump flow experiment of agricultural by-product ash containing sugar

14 and 15, as confirmed in the mixing ratio table below, cement mixture powder consisting of 63wt% of OPC and 27wt% of blast furnace slag powder (BS) in 10wt% of corn cup pellet ash or cornstalk and starch meal mixed pellet ash, respectively. This is a photograph of the slump flow experiment of unhardened concrete in which 181 wt% of fine aggregate, 230 wt% of coarse aggregate, and 1.2 wt% of high-performance AE water reducing agent including thickener were mixed as raw materials.

When agricultural by-product pellets containing sugar are burned and then pulverized and incorporated into concrete as a substitute for part of cement, it is possible to have workability equivalent to high flow concrete as shown in FIGS. 14 and 15, making concrete products It was confirmed that the production of

C. Slump flow experiment of coffee waste mixed ash

In order to make concrete with workability mixed with coffee ground ash, coffee ground pellets were mixed with rice hulls, corn cobs, starch, starch meal, and corn cup pellets, and then pulverized to conduct a concrete mixing test (mixing). See Table 8 below for ratios).

16 is a cement mixture powder raw material composed of 63 wt% OPC and 27 wt% blast furnace slag powder (BS) in 10 wt% ash pulverized after mixed combustion of rice husk, coffee waste, and corn cup pellets at a ratio of 7:2:1 and 181 wt% fine aggregate %, coarse aggregate 230 wt%, and high-performance AE water reducing agent including thickener 1.2 wt%.

17 is a cement mixture consisting of 63 wt% of OPC and 27 wt% of blast furnace slag powder (BS) in 10 wt% of ash pulverized after mixing and burning rice husk, coffee waste, corncob, and starch meal pellets at a ratio of 6:2:1:1 This is a photograph of the slump flow experiment of unhardened concrete in which 181 wt% of fine aggregate, 230 wt% of coarse aggregate, and 1.2 wt% of high-performance AE water reducing agent including thickener were mixed with the powder raw material in an external ratio.

18 is a cement mixture consisting of 63 wt% of OPC and 27 wt% of blast furnace slag powder (BS) in 10 wt% of ash pulverized after mixing and burning rice hulls, coffee ground pellets, corn starch, and potato starch at a ratio of 4:4:1:1 This is a photograph of the slump flow experiment of unhardened concrete in which 181 wt% of fine aggregate, 230 wt% of coarse aggregate, and 1.2 wt% of high-performance AE water reducing agent including thickener were mixed with the powder raw material in an external ratio.

From these mixing experiments, it was confirmed that concrete workability can be imparted to waste ash with high absorption rate by grinding the ash after mixing and burning sugar-containing agricultural by-products.

<Analysis of characteristics of coffee ground pellet ash-mixed concrete>

A concrete manufacturing experiment was conducted to evaluate the strength characteristics of concrete using incineration ash containing coffee ground pellet ash according to the present invention as an admixture.

The cement used in this experiment was CEM PILE cement, a cement for steam curing in which 30% of blast furnace slag is mixed with Halla Cement Co. , and the admixture used a polycarboxylic acid-based high-performance AE water-reducing agent with the addition of a thickener from Dongnam Enterprises.

For the fine aggregate, the experiment was conducted using crushed sand, which is widely used in actual product production, rather than Jumunjin standard sand. 22 (a) and (b) are photographs showing Jumunjin standard sand and crushed sand, respectively. The mixing ratio for concrete is shown in Table 8 below.

(Concrete product mixing ratio according to the present invention) Classification Ingredients content
(wt%) composition content
(wt%) Ingredients content
(wt%) Ingredients content
(wt%) chaff, coffee grounds,
Corn Cup Mix
pellet ash 10 Rice husk, coffee waste, corn cobs, starch meal mixed pellet ash 10 Rice husk, coffee waste, corn cobs, starch meal mixed pellet ash 10 Rice husk, coffee waste, corn starch, potato starch mixed pellet ash 10 Portland
Cement (OPC) 63 Portland
Cement (OPC) 63 Portland
Cement (OPC) 63 Portland
Cement (OPC) 63 Blast furnace slag (BS) fine powder 27 blast furnace slag
(BS) fine powder 27 blast furnace slag
(BS) fine powder 27 Blast furnace slag (BS) fine powder 27 fine aggregate 181 fine aggregate 181 fine aggregate 181 fine aggregate 181 coarse aggregate 230 coarse aggregate 230 coarse aggregate 230 coarse aggregate 230 mixed water 38 mixed water 35 mixed water 38 mixed water 38 High performance AE water reducing agent (including thickener) 1.2 High performance AE water reducing agent (including thickener) 1.2 High performance AE water reducing agent (including thickener) 1.2 High performance AE water reducing agent (including thickener) 1.2

As shown in Table 8, (a) in the concrete mixing experiment, 100 wt% cement consisting of 10 wt% of rice hull, coffee waste, and corn cup mixed pellet ash, 63 wt% of OPC, and 27 wt% of BS after pulverizing the incinerated ash remaining after combustion with a hammer mill 181 wt% of fine aggregate, 230 wt% of coarse aggregate, 38 wt% of mixing water, and 1.2 wt% of high-performance AE water reducing agent including thickener were mixed with the mixed powder raw material in an outer ratio, and a mixing experiment was conducted.

(b) 181 wt% of fine aggregate, 230 wt% of coarse aggregate, 35 wt% of mixing water in 100 wt% of cement mixture powder raw material consisting of rice husk, coffee waste, corn cob, starch meal mixed pellet ash 10wt%, OPC 63wt%, BS 27wt% A blending experiment was conducted by mixing 1.2 wt% of high-performance AE water-reducing agent including % and thickener in an outer ratio,

(c) 181 wt% of fine aggregate, 230 wt% of coarse aggregate, 38 wt% of mixing water in 100 wt% of cement mixture powder raw material consisting of rice husk, coffee waste, corn cob, starch meal mixed pellet ash 10wt%, OPC 63wt%, BS 27wt% A blending experiment was conducted by mixing 1.2 wt% of high-performance AE water-reducing agent including % and thickener in an outer ratio,

(d) 181 wt% of fine aggregate, 230 wt% of coarse aggregate, 38 wt% of mixing water in 100 wt% of cement mixture powder raw material consisting of rice husk, coffee waste, corn starch, and potato starch mixed pellet ash 10wt%, OPC 63wt%, BS 27wt% A blending test was conducted by mixing 1.2 wt% of high-performance AE water-reducing agent including % and thickener in an outer ratio, respectively.

<Performance comparison between concrete and general concrete mixed according to the present invention>

For comparison of the performance of the concrete made according to the present invention and the general concrete, the contrasting general concrete is 100 wt% of cement mixture powder consisting of 70 wt% of OPC and 30 wt% of BS, 181 wt% of fine aggregate, 230 wt% of coarse aggregate, and mixing water Mixing experiments were conducted by mixing 38 wt% and 1.2 wt% of a high-performance AE water reducing agent including a thickener in an outer ratio, respectively.

In addition, the contrasting general concrete reduces the amount of mixing water, 100wt% of cement mixture powder raw material consisting of 70wt% of OPC and 30wt% of BS, 181wt% of fine aggregate, 230wt% of coarse aggregate, 35wt% of mixed water and a thickener. Mixing experiments were conducted by mixing 1.2wt% each in an outer ratio.

A. Concrete slump flow experiment

In order to compare and evaluate the workability of concrete, a flow test was conducted according to 'Slump Flow Test Method for Unhardened Concrete (KS F 2594)'.

As shown in Table 4, looking at the components of the coffee waste pellet ash, it can be seen that SiO2, a latent hydraulic pozzolanic material, is small, while CaO, which can be expected for the first hydration reaction, contains about 19%. On the other hand, since alkali accounts for about 50%, it can be seen that if concrete mixing using coffee ground ash is possible, it can be used as an admixture that partially replaces cement for products that do not require high strength.

In addition, according to Tables 1 and 2, in the case of coffee waste, since the amount of ash is small, a large amount of ash is generated, and a mixing experiment was conducted by increasing the content of rice hull, which causes a problem of incineration ash disposal. In order for the mixed concrete to have workability, concrete mixing was performed by mixing and burning starch foil, starch, corn cups, cornstalks, etc. containing sugar to prepare coffee grounds mixed ash. It can also be seen that it can be used as an admixture that partially replaces cement.

B, concrete strength test

After measuring the slump flow of unhardened concrete in which cement was partially replaced with agricultural by-products and coffee waste incineration ash, a circular specimen of ø100 x 200mm was manufactured in accordance with the 'Method of manufacturing specimens for strength testing of concrete (KS F 2403)', and an 80° After curing for 12 hours at C, after curing in a constant temperature water bath at 21 ° C, the material age was 7 days, 28 days, and 56 days, and the compressive strength was measured according to the 'Concrete Compressive Strength Test Method (KS F 2405)' .

In order to compare the strength of the concrete specimen according to the present invention and the general concrete, a circular specimen of ø100 x 200mm was prepared in accordance with the 'Method of manufacturing a specimen for strength test of concrete (KS F 2403)' without the addition of agricultural by-product pellet ash. After fabrication, curing at 80°C for 6 hours, similar to the curing time for mass-produced precast concrete, and then curing in water in a constant temperature water bath at 21°C. was measured according to 'Concrete compressive strength test method (KS F 2405)'.

In addition, after manufacturing a circular specimen of ø100 x 200mm in accordance with 'Method of manufacturing a specimen for strength test of concrete (KS F 2403)', regular concrete without the addition of pellet ash, an agricultural by-product with increased strength by reducing the water-cement ratio by 35%, was After curing at °C for 12 hours, and then curing in water in a constant temperature water bath at 21 °C, the compressive strength at 7 days and 28 days of material age was measured according to 'Concrete Compressive Strength Test Method (KS F 2405)'. .

The results of the slump flow test of concrete and the strength test of concrete performed above were shown in FIGS. 19 and 20. 19 and 20 are views showing the slump flow and compressive strength of the concrete mix according to the present invention, respectively.

As shown in FIG. 19, the slump flow can be adjusted to the level of high-flow concrete by adjusting the mixing ratio of combustibles according to the purpose, and the strength reduction at a relatively high water-cement ratio due to the ash containing a large amount of alkali substances such as coffee grounds is It can be seen that the strength can be increased by relatively lowering the water-cement ratio as shown in FIG.

In particular, since the concrete according to the present invention uses domestic waste and power generation waste heat with low fuel cost, it is possible to secure economic feasibility, so it can be seen that the heating and curing time that promotes the initial hydration reaction can be taken longer than existing precast products, and at the same time, incineration ash It can also be seen that the amount of waste can be minimized by recycling.

The technical problem of the present invention is achieved by the technical configuration as described above, and although it has been described by the limited embodiments and drawings, it is not limited thereto and the present invention by those skilled in the art to which the present invention belongs Of course, various modifications and variations are possible within the scope of the technical idea of and the scope of the claims to be described below.

The present invention utilizes biomass such as agricultural and forestry by-products and combustible household waste such as coffee grounds (coffee waste) as resources for producing concrete to minimize the landfill amount of waste, and incinerated ash is applied to concrete production to reduce carbon While reducing emissions, it provides the benefit of expressing strength similar to existing concrete products.

100: Pellet ash manufacturing apparatus for concrete admixture according to the present invention
110: grinding unit
120: drying unit
130: pellet forming unit
140: pellet cooling unit
150: power generation unit
160: post combustion unit
170: post crushing unit
180: concrete product forming unit
190: concrete product curing unit
S1: crushing step
S2: drying step
S3: pellet forming step
S4: pellet cooling step
S5: development stage
S6: post-combustion step
S7: Post grinding step
S8: concrete product forming step
S9: concrete product curing step

Claims (14)

A first grinder for densely pulverizing any one or two or more of agricultural by-products such as rice husk, corncob, starch pulp, and cornstalks into a predetermined size and densely pulverizing combustible household waste such as coffee waste A crushing unit made of a second crusher;
A first dryer for drying the pulverized raw material pulverized by the first and second pulverizers to adjust moisture for compressing and molding into pellets, and drying only pulverized pulverized by the second pulverizer for high combustion efficiency a drying unit composed of a second dryer;
A pellet forming unit for forming pellets of a predetermined size using the pulverized water whose moisture content is adjusted by the first dryer;
A pellet cooling unit for cooling the pellets to maintain the strength of the fuel pellets formed in the pellet forming unit;
The fuel pellets passed through the pellet cooling unit and the coffee grounds, which are combustible wastes passed through the second dryer, are directly burned in the combustion device of the boiler, and the steam turbine is operated with the heat generated at this time to generate power or to solid fuel gasifier with pellets and A power generation unit generating power by operating the gas turbine with fuel obtained by pyrolysis or plasma gasification of coffee grounds and operating the steam turbine again with exhaust heat discharged from the gas turbine;
A post-combustion unit for burning the unburned pellet incineration ash for complete combustion of the unburnt pellet incineration ash remaining in the pellet incineration ash generated in the boiler combustion unit; and
A post-grinding unit that cools the pellet incineration ash passing through the post-combustion unit to a predetermined temperature and then pulverizes to obtain only fine-grained pellet ash; Pellet ash manufacturing apparatus for concrete admixture using biomass and combustible municipal waste, including a. According to claim 1,
The pellet ash manufacturing apparatus includes a curing unit configured to supply waste heat discharged from the power generation unit for curing concrete produced by using the pellet ash as a part of the admixture Concrete using biomass and combustible domestic waste Pellet ash manufacturing device for admixture. According to claim 1,
The exhaust gas discharged from the pellet incineration in the power generation unit filters out dust through a cyclone dust collector, desulfurizes through a semi-dry reactor (SDR), passes through a bag filter to filter out fine dust, and then waits Pellet ash manufacturing apparatus for concrete admixture using biomass and combustible municipal waste, characterized in that it is discharged into the inside. According to claim 2,
The power generation unit is provided with a heat exchanger, a condenser, and a pump, and the heat generated in the steam turbine is recovered from the heat exchanger, sent to the curing unit through the steam production unit, and returned to water by the condenser connected to the heat exchanger. The turning is a pellet ash manufacturing device for concrete admixture using biomass and combustible domestic waste, characterized in that supplied to the boiler combustion device for operating the steam turbine again through the pump to be circulated. According to claim 1,
Pellet ash manufacturing apparatus for concrete admixture using biomass and combustible municipal waste, characterized in that the moisture content of the pulverized material dried by the first dryer is maintained at 10 to 15% for pellet moldability. According to claim 1,
The pellets formed by the pellet forming unit have a diameter of 6 mm to 8 mm and a length of 50 mm or more for the combustion efficiency of the boiler. By the crushing unit composed of the first crusher and the second crusher, only one or two or more of agricultural by-products such as rice husk, corncob, starch pulp, and cornstalk are mixed by the first crusher. a pulverization step of densely pulverizing the flammable material and densely pulverizing combustible household waste such as coffee grounds by the second grinder;
In order to compress and mold the pulverized material raw material pulverized by the first and second pulverizers in the form of pellets by the drying unit composed of the first dryer and the second dryer, the moisture content of moisture is 10 to 15 a drying step of drying for adjustment to maintain %, and drying only the pulverized material pulverized by the second pulverizer by the second dryer for high combustion efficiency;
A pellet forming step of forming pellets having a diameter of 6 mm to 8 mm and a length of 50 mm or more using the pulverized water whose moisture content is adjusted by the first dryer;
A pellet cooling step of cooling the pellets to maintain the strength of the fuel pellets formed in the pellet forming step;
The fuel pellets passed through the pellet cooling unit and the coffee waste, which is a combustible waste, passed through the second dryer, are directly burned in the combustion device of the boiler, and the heat generated at this time is used to operate the steam turbine to generate electricity or pellets by a solid fuel gasification device. A power generation step of generating power by operating the gas turbine with fuel obtained by pyrolysis or plasma gasification of coffee waste and coffee grounds and operating the steam turbine again with exhaust heat discharged from the gas turbine;
A post-combustion step for burning the unburned pellet incineration ash for complete combustion of the unburnt pellet incineration ash remaining in the pellet incineration ash generated in the boiler combustion unit; and
A post-grinding step of cooling the pellet incineration ash passed through the post-combustion step to a predetermined temperature and then pulverizing to obtain only fine-grained pellet ash; Method for producing pellet ash for concrete admixture using biomass and combustible municipal waste, including a. According to claim 7,
Biomass and combustible life, characterized in that it includes a step for curing the concrete for a predetermined time by recovering the waste heat discharged from the power generation unit and supplying it to the storage space of concrete made of the pellet ash collected through the post-pulverization step Method for producing pellet ash for concrete admixture using waste. A concrete product manufactured by mixing the cement mixture powder containing at least two kinds of mixed pellet mixture made according to claim 7 with an AE water reducing agent containing aggregate, mixing water, and a thickener. According to claim 9,
The pellet mixture ash is ash or rice hull pellets, coffee meal pellets, corn cob pellets, and starch meal pellets pulverized after mixing and burning rice hull pellets, coffee meal pellets, and corn cup pellets at a ratio (%) of 7:2:1 6: After mixed combustion at a ratio (%) of 2:1:1, pulverized ash or rice husk pellets, coffee ground pellets, corn starch, and potato starch were mixed and burned at a ratio (%) of 4:4:1:1 and then pulverized. A concrete product to be manufactured, characterized in that it is ash. According to claim 9,
The cement mixture powder is 10wt% of rice husk, coffee waste, and corn cup mixed pellet ash or 10wt% of rice hull, coffee waste, corn cob, starch foil mixed pellet ash or 10wt% of rice hull, coffee waste, corn starch, potato starch mixed pellet ash A concrete product characterized in that it is formed by mixing 63 wt% of Portland cement (OPC) and 27 wt% of blast furnace slag powder (BS). According to any one of claims 9 to 11
The rice hull pellet ash contained 85.2wt% of SiO2 and 2.9wt% of CaO, the coffee ground pellet ash contained 36.7% of SiO2, 19.3% of CaO, and 4.4% of Al2O3, the corn cup pellet ash contained 48.3% of SiO2, 10.8% of Al2O3, And CaO 13.9%, and the cornstalk and starch meal mixture pellet ash contains 38.3% of SiO2, 18.9% of CaO, and 7.6% of Al2O3 as constituents, respectively. According to any one of claims 9 to 11
A precast concrete product, characterized in that each of the rice hull, corn cup, starch meal, corn cob, and bean cob pellet ash has a particle size of 31.4 μm or less. According to any one of claims 9 to 11,
The concrete product, characterized in that the concrete slump flow is any one of 395 ~ 590mm.