KR101885486B1 - Method for producing lime fertilizer using calcium oxide with high degree of purity and the device for producing lime fertilizer - Google Patents

Abstract

The present invention relates to a lime fertilizer preparing apparatus for preparing lime fertilizers by using limestone and organic waste. The lime fertilizer preparing apparatus includes: a limestone processing unit for preprocessing the limestone; a waste processing unit for preprocessing the organic waste; and a main mixing unit for preparing the lime fertilizers in linkage with the limestone processing unit and the waste processing unit. The limestone processing unit includes: a motorized hopper for injecting the limestone; a limestone grinder for grinding the limestone; and a mixing coater which mixes the finely ground limestone and stearic acid to coat the limestone with stearic acid. The waste processing unit includes: a preliminary dryer for drying the organic waste; a mixing extruder which mixes the organic waste at a high temperature and under a high pressure; and a drying fermenter which dries and ferments the organic waste. The main mixing unit includes: a first preprocessing tank for mixing the quicklime material being coated with the stearic acid and a by-product of fertilizers; a second preprocessing tank for storing the organic waste; and an aging chamber which mixes the limestone and organic waste.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and apparatus for producing lime fertilizer using high purity calcium oxide,

The present invention relates to a method and a device for manufacturing a lime fertilizer using high purity calcium oxide, and more particularly, to a method for mass production of a high purity calcium oxide produced by modifying a limestone surface to a lower production cost than conventional techniques, And more particularly, to a method and an apparatus for manufacturing the same.

Generally, when calcined limestone having a calcium carbonate content of 98.5-99% and a grain size of about 30-60 mm is calcined in a calcination furnace, the purity of the obtained quicklime is about 90-92%. This is because the calcium carbonate inside the rough stone remains in the unfired state or is excessively fired, so that the CaO is entangled.

Therefore, in order to produce high-purity calcium oxide, calcined CaO is hydrated to produce calcium hydroxide (Ca (OH) ₂ ), and the generated calcium hydroxide is adsorbed to carbon dioxide gas to generate calcium carbonate and then calcined to obtain calcium oxide Have been used.

However, the manufacturing method of the quicklime is complicated and consumes a lot of energy, which is not economical.

As a method for manufacturing powdered quicklime, Korean Patent No. 249734 discloses a method in which limestone powder or limestone sludge of 2 mm or less is placed in a furnace in a circular furnace in which the furnace temperature is maintained at 825-1,250 ° C, And a method of firing the mixture at a stirring speed while stirring, and Korean Patent No. 136195 discloses a method in which a hydro residue sludge generated during a refractory manufacturing process is mass-processed, dried, and then heated at a temperature of 850-1050 ° C for 40-80 minutes Lt; RTI ID = 0.0 > lime. ≪ / RTI >

However, the method of manufacturing powdered quicklime by these methods has been pointed out as a problem that the energy consumption is large, the purity of the obtained quicklime is low, and hydration is likely to occur during storage and management.

In addition, since the ammonia remaining in the byproducts (hereinafter referred to as "sludge") produced by the quick lime hydration reaction (chemical reaction) has a bad odor, it must be oxidized for a long time (30 to 45 days) The soil is cured when it is used in a large amount, and when it is used as a powder, there is a problem that the dispersing effect is poor in the water having rainwater and the possibility of being lost by the wind is high.

In order to solve the above problems, when pellets are used as fertilizer, calcium contained in the sludge is cured by the cement hydration reaction and is not easily broken when sprayed on the field, resulting in loss of function as fertilizer there was.

It is an object of the present invention to provide a method and an apparatus for producing high quality lime fertilizer using high purity calcium oxide and organic waste.

Another object of the present invention is to provide a lime fertilizer manufacturing apparatus capable of uniformly modifying quick lime and effectively treating organic wastes.

It is still another object of the present invention to provide a method and an apparatus for efficiently producing lime fertilizer in one continuous process using high purity calcium oxide and organic waste.

According to one aspect of the present invention, there is provided an apparatus for producing a lime fertilizer for making lime fertilizer using limestone and organic waste, the apparatus comprising: a limestone treatment unit for pretreating the limestone; And a main mixing unit connected to the waste treatment unit to produce a lime fertilizer, wherein the limestone treatment unit comprises: a motorized hopper for injecting the limestone; A limestone crusher connected to the electric hopper to crush the limestone; And a mixing coater for producing calcium oxide coated with stearic acid by mixing calcined lime and stearic acid by calcining the finely divided limestone by being connected to the limestone crusher, A preliminary drier for drying to a moisture content of 20 to 45% by weight; A mixing extruder for mixing the organic waste received in the preliminary dryer at a high temperature and a high pressure; And a dry fermenter for drying and fermenting organic wastes transferred from the mixing extruder to a moisture content of 10 to 30% by weight, wherein the main mixing unit is connected to the mixed coater, A first pretreatment tank for mixing the byproducts; A second pretreatment tank connected to the dry fermenter to store the organic waste; And an aging chamber connected to the first and second pretreatment vessels to mix the stearic acid coated quicklime and the fertilizer byproduct mixture and the organic waste transferred from the first and second pretreatment vessels, .

The motorized hopper includes an upper hopper having an upper surface and a cylindrical shape accommodating limestone, a lower hopper connected to the upper hopper and provided in the form of a funnel, and a second mesh network interposed between the upper hopper and the lower hopper. The upper hopper is provided with an oscillating member for vibrating the upper hopper, and a valve for controlling the opening and closing of the lower hopper may be provided at a distal end of the lower hopper.

The limestone crusher includes a crushing main body having a rectangular box shape and connected to a motorized hopper at an upper portion thereof; A pulverizing mixer provided inside the pulverizing body; And a second mesh net provided in at least one hole for discharging the limestone from a lower surface of the crushing main body, wherein the crushing mixer comprises: a shaft connected in the lateral direction of the crushing main body; The helical blade includes a blade, and a heat wire is provided in the shaft to transfer heat to limestone in contact with the crushing mixer, and the end of the helical blade may be provided in a sawtooth shape.

The mixing coater includes a mixing body for mixing and coating stearic acid with the quicklime; A main body agitator provided in the mixing body; A stearic acid injector connected to the side surface of the mixing body to spray the stearic acid; A temperature sensor provided inside the mixing body to measure a temperature inside the mixing body; And a heater which surrounds the outer surface of the mixing body and supplies heat to the interior of the mixing body.

The stearic acid injector may further include: a head part in which the stearic acid is sprayed; A connection guide part connected to the head part and controlling the position of the head part and being a passage through which the stearic acid flows; And a fastening part extending from the connection guide part and fastened to the mixing body.

Wherein the main mixing unit includes a first pretreatment tank connected to the mixing coater to mix the raw lime coated with the stearic acid and the by-product of fertilizer; A second pretreatment tank connected to the dry fermenter to store the organic waste; And an aging chamber connected to the first and second pretreatment vessels and mixing the organic waste with a mixture of the stearic acid coated quicklime and the fertilizer by-products delivered from the first and second pretreatment vessels.

The first pretreatment tank may include a first main inlet through which the stearic acid-coated quicklime flows, a first sub inlet through which the by-product of the fertilizer flows, the first sub inlet being located adjacent to the first main inlet, A first air jacket provided on an outer surface of the first pretreatment tank to maintain the temperature of the first pretreatment tank and a second air jacket provided below the first pretreatment tank so as to mix the stearic acid, And a first outlet for delivering a mixture of coated quicklime and fertilizer byproducts to the aging chamber.

The second pre-treatment vessel includes a second main inlet and a second sub inlet, which are adjacent to the second main inlet and into which the organic waste flows, the air valve being provided to inject air and control the flow rate of air to be injected; A second air jacket provided on the outer surface of the second pretreatment tank and maintaining the temperature of the second pretreatment tank, and a second air jacket provided below the second pretreatment tank, And one or more second outlets for delivering organic waste to the aging chamber.

Wherein the first and second pre-treatment chambers are provided on the upper side of the aging chamber, the first outlet is provided to have a larger cross-sectional area than the second outlet, and the second outlet is provided as a pair, .

The aging chamber may include an air plate provided inside the aging chamber to divide the space of the aging chamber into an upper portion and a lower portion; An air nozzle provided at a lower portion of the aging chamber to inject air into the aging chamber; At least one third agitator provided at a side of the air-tightening chamber for mixing the mixture of the stearic acid-coated quicklime and the fertilizer by-product into the aging chamber and the organic waste; And an exposing and discharging unit disposed on a side surface of the aging chamber to discharge the mixed material from the aging chamber.

The air plate is provided so as to correspond to the transverse section of the aging chamber to divide the space of the aging chamber into an upper portion and a lower portion, and a metal plate made of stainless steel. The air plate has a plurality of holes therein. Is passed through the hole of the air plate and is transferred to the upper portion of the aging chamber, and vortex can be formed by stirring the third agitator.

According to another aspect of the present invention, there is provided a method of manufacturing a lime fertilizer using a quicklime using the apparatus for producing lime fertilizer, wherein the limestone is finely pulverized to 10 탆 or less and the obtained pulverulent limestone is pulverized to 750-900 캜 (CaO), and coating the resulting quicklime with stearic acid using the retained heat; Mixing the stearic acid-coated quicklime with gypsum (CaSO ₄ ), dolomite (CaMg (CO ₃ ) ₂ ), and crushed shell powder, which are by-products of fertilizer; Preparing an organic waste; Adding 30 to 50 parts by weight of organic waste to 50 to 70 parts by weight of the quicklime coated with the stearic acid; Stirring while maintaining at room temperature; Maintaining in air for 2 to 3 days at a temperature range of 20 DEG C to 25 DEG C; And molding the pellets into a pellet.

The preparation of the organic waste may include: a first drying step of mixing the food waste with a moisture control agent to adjust the water content to 20 to 45 wt%; A compression step of feeding the organic waste whose moisture content is controlled into a high-temperature and high-pressure mixing extruder; And a second drying step of drying and fermenting the organic waste having passed through the mixing extruder in a dry fermenter to adjust the water content to 10 to 30% by weight.

The moisture regulator may be any one or more of minerals such as minerals, dried organic matter, corn, starch grains and by-products. The temperature of the mixing extruder may be 100 to 350 ° C, and the pressure may be 20 to 100 atm.

As described above, according to the present invention, it is possible to provide a method and apparatus for manufacturing high-quality lime fertilizer using high purity calcium oxide and organic waste.

Further, according to the present invention, it is possible to provide a lime fertilizer producing apparatus capable of uniformly modifying quick lime and effectively treating organic wastes.

Also, according to the present invention, lime fertilizer can be efficiently provided in one continuous process using high purity calcium oxide and organic waste.

1 is a schematic view of a lime fertilizer manufacturing apparatus according to an embodiment of the present invention.
Fig. 2 is a view showing the limestone treatment section of Fig. 1;
3 is a perspective view of the pulverizing mixer of Fig.
Figure 4 is a perspective view of the stearic acid injector of Figure 2;
FIG. 5 is a schematic view of the waste treatment section of FIG. 1. FIG.
FIG. 6 is a view showing the main mixing section of FIG. 1;
FIG. 7 is a view showing the aging chamber of FIG. 6. FIG.
Fig. 8 is a view schematically showing the flow of air in Fig. 7. Fig.
Fig. 9 is a perspective view of the air plate of Fig. 6;
10 is a flowchart illustrating a method of manufacturing a lime fertilizer according to another embodiment of the present invention.

The details of other embodiments are included in the detailed description and drawings.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention, and the manner of achieving them, will be apparent from and elucidated with reference to the embodiments described hereinafter in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments described below, but may be embodied in various forms. In the following description, it is assumed that a part is connected to another part, But also includes a case in which other media are connected to each other in the middle. In the drawings, parts not relating to the present invention are omitted for clarity of description, and like parts are denoted by the same reference numerals throughout the specification.

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

1 is a schematic view of a lime fertilizer manufacturing apparatus according to an embodiment of the present invention. FIG. 2 is a view showing the limestone treatment section of FIG. 1, FIG. 3 is a perspective view of the crushing mixer of FIG. 2, and FIG. 4 is a perspective view of the stearic acid injector of FIG. FIG. 5 is a schematic view of the waste treatment section of FIG. 1, FIG. 6 is a view showing the main mixing section of FIG. 1, and FIG. 7 is a view showing the aging chamber of FIG. Fig. 8 is a view schematically showing the flow of air in Fig. 7, and Fig. 9 is a perspective view of the air plate in Fig.

One embodiment of the present invention relates to a lime fertilizer production apparatus (10) for producing lime fertilizer by using quicklime obtained by firing limestone and organic waste, wherein the lime fertilizer production apparatus (10) comprises a limestone treatment section A waste treatment unit 200 for pretreating the organic waste and a main mixing unit 300 connected to the limestone treatment unit 100 and the waste treatment unit 200 to produce lime fertilizer.

The apparatus 10 for producing lime fertilizer according to the present embodiment is characterized in that the limestone is calcined and formed into quicklime, the quality of the quicklime is modified by using stearic acid, the organic waste is treated and mixed with the modified quicklime, It is about equipment for making fertilizer. It is possible to solve the problem of environmental pollution by using the organic wastes together and it is also possible to produce limestone fertilizer by treating limestone with quicklime using continuous process and treating organic wastes together after modification, Can be implemented.

The limestone treatment unit 100 includes: a motorized hopper 120 for injecting the limestone; A limestone crusher 110 connected to the electric hopper 120 to crush the limestone; And a mixing coater 130 connected to the limestone crusher 110 to calcine the finely divided limestone to prepare quicklime, and mixing the quicklime and stearic acid to coat the quicklime with stearic acid.

The waste treatment unit 200 includes a preliminary dryer 210 for drying the organic waste to a moisture content of 20 to 45% by weight; A mixing extruder 220 for mixing the organic waste received in the preliminary dryer 210 at a high temperature and a high pressure; And a dry fermenter 230 for drying and fermenting the organic waste transferred from the mixing extruder 220 so that the water content of the organic waste is 10 to 30% by weight.

The main mixing unit 300 includes a first pretreatment vessel 310 connected to the mixing coater 130 to mix the raw lime coated with the stearic acid and the by-product of fertilizer. A second pretreatment vessel 320 connected to the dry fermenter 230 to store the organic waste; And an aging chamber 330 connected to the first and second pretreatment vessels 310 and 320 to mix the calcium oxide and the organic waste transferred from the first and second pretreatment vessels 310 and 320, have.

The limestone treatment section 100 may be prepared by finely pulverizing limestone (CaCO ₃ ) to an average particle diameter of 10 μm or less, and adding the obtained fine limestone to an apparatus such as a calciner capable of automatically controlling the temperature, And calcined at a temperature of 900 ° C to form calcium oxide (CaO), and then the resulting quicklime is cooled and coated with a fatty acid, whereby a high-purity calcium oxide can be produced. For example, the fatty acid may be stearic acid.

The process of pulverizing the limestone can be carried out through the electric hopper 120 and the limestone mill 110. The process of calcining the pulverized limestone to prepare the burnt lime and cooling it, ). ≪ / RTI >

The motorized hopper 120 is a portion where limestone is injected from the outside, and the limestone can be crushed in advance before the limestone is transferred to the limestone crusher 110.

The motorized hopper 120 includes an upper hopper 120a having a cylindrical upper surface opened to receive limestone and a lower hopper 120b connected to the upper hopper 120a to form a funnel, And a first mesh network 122 interposed between the lower hopper 120a and the lower hopper 120b.

The upper hopper 120a is provided with a vibration member 124 for vibrating the upper hopper 120a and a valve 123 for controlling opening and closing of the lower hopper 120b is provided at the end of the lower hopper 120b .

The vibrating member 124 may be provided on the outer surface of the motorized hopper 120 to preliminarily crush the limestone provided in the motorized hopper 120 by vibrating the motorized hopper 120. The first mesh net 122 may be provided in a mesh form so that only limestone of a predetermined size can be transmitted from the upper hopper 120a to the lower hopper 120b through the first mesh net 122 . In the lower hopper 120b, a valve 123 can be used to control the opening and closing of the lower hopper 120b, so that only a predetermined amount of the liquid is supplied from the motorized hopper 120 to the limestone crusher 110 .

The limestone preliminarily crushed in the electric hopper 120 may be transferred to the limestone crusher 110 to be finely divided. In the limestone crusher 110, the limestone may be differentiated to an average particle size of 10 탆 or less. When the average particle size of the limestone exceeds 10 탆, it is difficult to produce the desired high-purity calcium oxide after firing, and energy consumption is increased during the subsequent firing.

When the average particle size of the limestone is not more than 10 탆, the specific surface area subjected to heat is increased, and the time required for the heat to reach the deep portion of the limestone is reduced, so that even if the calcination temperature is relatively low, .

The limestone crusher 110 includes a crushing main body 111 having a rectangular box shape and connected to the electric hopper 120 at an upper portion thereof. A crushing mixer 112 provided inside the crushing main body 111; And a second mesh net 123 having a smaller diameter than that of the first mesh net 122 provided in at least one hole for discharging the limestone from the lower surface of the crushing main body 111 have. In the crushing main body 111, the limestone may be finely divided into an average particle size of 10 탆 or less. The second mesh net 123 may be provided in a network form so that only limestone having an average particle diameter of 10 탆 or less can be discharged to the outside have. The second mesh net 123 may be provided at one end and at the other end of the lower surface of the pulverizing body 111, respectively.

The pulverizing mixer 112 may include a shaft 112a connected in the lateral direction of the pulverizing body 111 and a helical blade 112b provided in the shaft 112a. The shaft 112a may be provided with a heat ray 112c to transfer heat to the limestone in contact with the crushing mixer 112. The end of the helical blade 112b may be formed in a sawtooth shape.

The limestone can be differentiated inside the pulverizing body 111 by the pulverizing mixer 112. At this time, the shaft 112a may be provided with a heat ray 112c, and heat may be transmitted to the limestone by the heat ray 112c. The finely divided limestone is preheated by the hot line 112a so that the limestone can be more uniformly finely divided and the heat can be more evenly transferred to the inside of the limestone in the subsequent firing process.

The limestone may be transmitted to the mixing coater 130 through the second mesh net 123 of the pulverizing main body 111. In the mixing coater 130, the limestone is calcined at a temperature of 750 ° C to 900 ° C to form calcium oxide (CaO), followed by cooling, and then the quicklime may be coated with fatty acid which is stearic acid.

The mixing coater 130 is provided with a mixing body 131 for firing the limestone to produce quicklime, mixing the slaked lime with stearic acid to form a quick lime coated with stearic acid, A main body agitator 134 provided inside the mixing body 131; A stearic acid injector 400 connected to a side surface of the mixing body 131 to spray the stearic acid; A temperature sensor 133 provided inside the mixing body 131 to measure a temperature inside the mixing body 131; And a heater 132 which surrounds the outer surface of the mixing body 131 and supplies heat to the interior of the mixing body 131.

The limestone introduced into the mixing body 131 is fired at a temperature of 750 ° C to 900 ° C by the heater 132 and then cooled. At this time, heat can be uniformly transferred through the main body agitator 134 inside the mixing body 131 while stirring the limestone. The heat inside the mixing body 131 through the temperature sensor 133 It can be monitored constantly. Then, the lime can be cooled while keeping the limestone in the mixing body 131 by sintering.

The cooled quicklime may be mixed with stearic acid. The stearic acid flows through the nozzle 135 connected to the outside of the mixing body 131 and is supplied to the inside of the mixing body 131 through the stearic acid injector 400 Lt; / RTI >

The stearic acid injector 400 includes a head 401 to which the stearic acid is sprayed; A connection guide part 402 connected to the head part 401 to control the position of the head part 401 and being a passage through which the stearic acid flows; And a fastening fixing part 403 extending from the connection guide part 402 and fastened to the mixing body 131.

The fastening and fixing unit 403 can be fastened to the inner surface of the mixing body 131 through a screw connection. The connection guide part 402 may be formed in the shape of a bellows and the stearic acid injected through the head part 401 may be deformed by the connection guide part 402 in various directions .

The organic waste may be mixed with the quicklime after being treated in a waste treatment unit 200 comprising a preliminary dryer 210, a mixing extruder 220 and a dry fermenter 230.

In the preliminary dryer 210, the food waste and the moisture control agent may be mixed together to make the moisture content of the food waste 20 to 40% by weight. The moisture regulator may be at least one of minerals, minerals, dried organic matter, corn, starch grains and by-products thereof. In addition, since the warm air is provided inside the preliminary dryer 210, the moisture content in the food waste can be more easily controlled.

The organic waste as food waste dried in the preliminary dryer 210 may be put into a mixing extruder 220 having a temperature of 100 to 350 ° C and a pressure of 20 to 100 atm to be compressed at a high temperature and a high pressure. The organic waste treated in the mixing extruder 2200 is transferred to a dry fermenter 230 to be dried and fermented so that the moisture content thereof is 10 to 30% by weight. The dry fermenter 230 includes a heating jacket So that the temperature of the dry fermenter 230 can be maintained constant.

The quick lime coated with the stearic acid treated in the limestone treatment part 100 and the organic waste treated in the waste treatment part 200 may be transferred to the main mixing part 300 and mixed.

The main mixing unit 300 includes a first pretreatment vessel 310 connected to the mixing coater 130 to mix the raw lime coated with the stearic acid and the by-product of fertilizer. A second pretreatment vessel 320 connected to the dry fermenter 230 to store the organic waste; And an aging chamber 330 connected to the first and second pretreatment vessels 310 and 320 to mix the raw stones coated with stearic acid and organic waste transferred from the first and second pretreatment vessels 310 and 320, ; ≪ / RTI >

The first pretreatment vessel 310 may be a box-shaped chamber having a first space 311 in which lime is coated with stearic acid, and the first space 311 may be coated with stearic acid The byproducts of fertilizer may be introduced and agitated together with the quicklime.

The first pre-treatment tank 310 is provided with a first main inlet 313 through which the quick lime coated with stearic acid flows, and a second sub inlet 323 adjacent to the first main inlet 313 to receive the fertilizer by- A first agitator 315 provided in a first space 311 inside the first pretreatment tank 310 for mixing the raw lime coated with stearic acid and the byproducts of fertilizer 315, A first air jacket 312 provided on the outer surface of the first pretreatment vessel 310 to maintain the temperature of the first pretreatment vessel 310 and a second air jacket 312 disposed below the first pretreatment vessel 310 to mix the stearic acid- And a first outlet (341) for transferring to the aging chamber (330).

In the first pretreatment tank 310, the raw lime coated with stearic acid and the by-product of fertilizer may be mixed. The raw lime coated with stearic acid and the by-product of fertilizer may be separately provided from the first main inlet 313 and the first sub- May be separately introduced into the first space 311 through the first opening 314. In the first pretreatment tank 310, the first air jacket 312 maintains the temperature of the first space 311 within a predetermined range while uniformly stirring the raw lime coated with the stearic acid and the by-product of fertilizer, Can be manufactured. The agitated mixture can be delivered to the aging chamber 330 through the first outlet 341, which is provided with a valve 341a and can control the discharge amount of the mixture.

The second pre-treatment tank 320 is provided adjacent to the second main inlet 323 and the second main inlet 323 through which the organic waste flows, and injects air to control the flow rate of air to be injected. And a second sub-inlet 324 having a valve 324a. In addition, in the first space 321 inside the second pre-treatment tank 320, the organic wastes and the air introduced through the second sub-inlet 324 may be mixed. In the second pretreatment tank 320, air is injected into the organic waste so that the organic matter in the organic waste can be better fermented.

A second agitator 325 for mixing the organic waste in the second space 321 inside the second pretreatment tank 320 and a second agitator 325 for mixing the organic waste in the second pretreatment tank 320 provided on the outer surface of the second pretreatment tank 320, And a valve 342a disposed under the second pretreatment tank 320 to transfer the organic waste to the aging chamber 330 and to control the amount of the organic waste to be delivered to the aging chamber 330 And may include one or more second outlets 342.

The second air jacket 323 provided on the outer surface of the second pre-treatment tank 320 is connected to the second pre-treatment tank 320 through the second pre- By keeping the temperature of the second space 321 of the pretreatment tank 320 constant, fermentation can be performed uniformly.

The first and second pretreatment vessels 310 and 320 are provided on the upper side of the aging chamber 330 and the first discharge port 341 is formed to have a wider sectional area than the second discharge port 342, The second outlets 342 are provided as a pair and can be individually opened and closed.

Since the fresh lime is mixed in the process of mixing the quick lime coated with the stearic acid and the organic waste, the first discharge port 341 is larger than the second discharge port 342 so that mixing can be more uniform . In addition, the organic waste may adhere to the outer wall of the nozzles through which the organic wastes are discharged, thereby blocking the passage of the second outlet 342. At this time, if the second outlet 342 is not smooth, the second outlet 342 can be used alternately.

The quick lime coated with stearic acid and the organic waste treated in the first and second pretreatment vessels 310 and 320 may be delivered to the aging chamber 330 and aged, respectively. The aging chamber 330 includes an air plate 335 provided inside the aging chamber 330 to divide the space of the aging chamber 330 into an upper portion 330a and a lower portion 330b. An air nozzle 333 disposed under the aging chamber 330 to inject air into the aging chamber 330; At least one third agitator (334) provided at the inner side surface of the aeration chamber (330) and mixing the mixture of the stearic acid coated quicklime and the fertilizer byproduct into the aging chamber (330) and organic waste; And a discharge vent 331 provided on a side surface of the aging chamber 330 to discharge the mixed material in the aging chamber 330.

Mixtures supplied with the air into the aging chamber 330, fresh lime coated with stearic acid, organic wastes, etc. may be mixed into the aging chamber 330 and aged. For example, these mixtures may be maintained in the air in the aging chamber 330 at a temperature ranging from 20 ° C to 25 ° C for 2 to 3 days.

The air plate 335 is provided to correspond to the cross section of the aging chamber 330 so that the internal space of the aging chamber 330 can be divided into an upper portion 330a and a lower portion 330b. The air plate 335 is a kind of metal plate made of stainless steel and may have a plurality of holes 335a therein.

The air flowing through the air nozzle 333 passes through the hole 335a of the air plate 335 and is transferred from the lower portion 330b to the upper portion 330a of the aging chamber 330, Vortex can be formed by stirring the agitator 334.

The air may be agitated while supplying air into the aging chamber 330. At this time, air is supplied from the lower portion through the air plate 335, and the air is supplied to the agitating chamber 330 through the third agitator 334, Air can be aged more uniformly by supplying air into the inside of the quicklime and organic waste coated with stearic acid in the aging chamber 330 by forming a vortex.

Hereinafter, another embodiment of the present invention will be described with reference to FIG. Except for the contents to be described later, the contents similar to those described in the embodiments described in Figs. 1 to 9 will be omitted.

10 is a flowchart illustrating a method of manufacturing a lime fertilizer according to another embodiment of the present invention.

According to another aspect of the present invention, there is provided a method of manufacturing a lime fertilizer using a quicklime using the apparatus for producing lime fertilizer, wherein the limestone is finely pulverized to 10 탆 or less and the obtained pulverulent limestone is pulverized at a temperature of 750-900 캜 Calcining to form calcium oxide (CaO), and coating the generated calcium oxide with stearic acid using the retained heat; Mixing the lime with stearic acid coated with gypsum (CaSO4), dolomite (CaMg (CO3) 2), and crushed shell powder; Preparing an organic waste; Adding 30 to 50 parts by weight of organic waste to 50 to 70 parts by weight of the quicklime coated with the stearic acid; Stirring while maintaining at room temperature; Maintaining in air for 2 to 3 days at a temperature range of 20 DEG C to 25 DEG C; And molding the pellet into a pellet.

By pulverizing the limestone into fine particles having a size of 10 mu m or less, the limestone can be uniformly fired uniformly at the time of firing, so that high-quality calcium oxide can be obtained, and the surface area can be increased to lower the firing temperature. Further, the surface of the quicklime can be modified by coating the stearic acid, thereby further improving the efficiency of the fertilizer.

The preparation of the organic waste may include: a first drying step of mixing the food waste with a moisture control agent to adjust the water content to 20 to 45 wt%; A compression step of feeding the organic waste whose moisture content is controlled into a high-temperature and high-pressure mixing extruder; And a second drying step of drying and fermenting the organic waste having passed through the mixing extruder in a dry fermenter to adjust the water content to 10 to 30% by weight.

The organic waste may be preliminarily dried through the first drying step so that the moisture can be more efficiently compressed in the mixed extruder. Followed by drying and fermentation in a second drying step, so that it is uniformly dried and fermented.

The moisture regulator may be any one or more of minerals such as minerals, dried organic matter, corn, starch grains and by-products. The temperature of the mixing extruder may be 100 to 350 ° C, and the pressure may be 20 to 100 atm.

In addition, the dolomite _{(CaMg [CO 3] 2)} ( also known as dolomite, pH 8.0 ~ alkalinity of 8.1 concentration range) by-product gypsum (CaSO _4), magnesium (MgO) and calcium (Ca) oxide in the fertilizer production is the main component, Shellfish powder and quicklime (CaO) can be mixed at a certain ratio. When the fertilizer by-product is further added to the soil, it is mixed with an inorganic substance such as iron (Fe), phosphorus (P) and aluminum (Al) in the soil and an organic substance such as amine, amino acid and lower lactic acid, (Ca), dolomite (CaMg [CO ₃ ] ₂ ), shell powder and gypsum (CaSO ₄ ) are mixed with each other, (Hg) and lead (Pb) are rapidly reduced even in the weakly alkaline state of calcium, and the like, as well as the reduction of arsenic (As) and cadmium It also has the power to decompose and neutralize even heavy metals and oil, and it can improve the acidified polluted environment to alkaline.

It will be understood by those skilled in the art that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive. The scope of the present invention is defined by the appended claims rather than the foregoing detailed description, and all changes or modifications derived from the meaning and scope of the claims and the equivalents thereof are included in the scope of the present invention Should be interpreted.

100: limestone treatment section
110: Limestone crusher
120: Electric hopper
130: Mixer Coater
200: waste treatment section
210: preliminary dryer
220: Mixing extruder
230: Dry fermenter
300: main mixing section

Claims (11)

In a lime fertilizer manufacturing apparatus for making lime fertilizer using limestone and organic waste,
The apparatus for producing lime fertilizer comprises a limestone treatment unit for pretreating the limestone, a waste treatment unit for pretreating the organic waste, and a main mixing unit connected to the waste treatment unit to produce a lime fertilizer,
The limestone treatment section comprises:
A motorized hopper for injecting the limestone;
A limestone crusher connected to the electric hopper to crush the limestone; And
And a mixed coater for producing the quick lime coated with the stearic acid by mixing the quick lime and the stearic acid, wherein the mixed liquor is formed by calcining the finely divided limestone by being connected to the limestone crusher,
The waste treatment unit includes:
A preliminary dryer for drying the organic waste to a moisture content of 20 to 45% by weight;
A mixing extruder for mixing the organic waste received in the preliminary dryer at a high temperature and a high pressure; And
And a dry fermenter for drying and fermenting the organic waste transferred from the mixing extruder so that the moisture content is 10 to 30% by weight,
The main mixer
A first pretreatment vessel connected to the mixing coater to mix the raw lime coated with the stearic acid and the by-product of fertilizer;
A second pretreatment tank connected to the dry fermenter to store the organic waste; And
And an aging chamber connected to the first and second pretreatment vessels to mix the stearic acid coated quicklime and fertilizer by-product mixture delivered from the first and second pretreatment vessels with the organic waste,
The motor-
And a first mesh network interposed between the upper hopper and the lower hopper, wherein the lower hopper is connected to the upper hopper and is formed in the form of a funnel,
Wherein the upper hopper is provided with an oscillating member for oscillating the upper hopper and a valve for controlling the opening and closing of the lower hopper is provided at the end of the lower hopper. delete The method according to claim 1,
The limestone crusher comprises:
A crushing body provided in a box shape of a quadrangle and connected to an electric hopper at an upper portion thereof;
A pulverizing mixer provided inside the pulverizing body; And
And a second mesh net provided in at least one hole for discharging the limestone from a lower surface of the crushing main body,
Wherein the pulverizing mixer includes a shaft connected in the lateral direction of the pulverizing body, and a helical blade provided in the shaft,
Wherein the shaft is provided with heat lines for transferring heat to limestone in contact with the crushing mixer, and the end of the helical blade is provided in a sawtooth shape. The method according to claim 1,
Wherein the mixing coater comprises:
A mixed body in which stearic acid is mixed and coated on the quicklime;
A main body agitator provided in the mixing body;
A stearic acid injector connected to the side surface of the mixing body to spray the stearic acid;
A temperature sensor provided inside the mixing body to measure a temperature inside the mixing body;
And a heater for surrounding the outer surface of the mixing body and supplying heat to the interior of the mixing body. 5. The method of claim 4,
The stearic acid injector may include:
A head portion on which the stearic acid is sprayed;
A connection guide part connected to the head part and controlling the position of the head part and being a passage through which the stearic acid flows; And
And a fastening fixing part extending from the connection guide part and fastened to the mixing body. delete The method according to claim 1,
The first pre-
A first sub inlet which is adjacent to the first main inlet and into which the fertilizer byproduct is introduced, a first sub inlet which is provided in the first pretreatment vessel and which is coated with the stearic acid coated quicklime A first air jacket provided on an outer surface of the first pretreatment tank to maintain the temperature of the first pretreatment tank and a fresh air jacket provided under the first pretreatment tank and coated with the stearic acid, And a first outlet for delivering a mixture of byproducts to the aging chamber,
The second pre-
A second sub inlet provided adjacent to the second main inlet to control the flow rate of air to be injected while injecting air, a second sub inlet provided in the second pre-treatment vessel, A second air jacket provided on an outer surface of the second pretreatment tank to maintain the temperature of the second pretreatment tank, and a second air jacket provided below the second pretreatment tank, the organic waste disposed in the aging chamber, To the second outlet,
Wherein the first and second pre-treatment chambers are provided on the upper side of the aging chamber, the first outlet is provided to have a larger cross-sectional area than the second outlet, and the second outlet is provided as a pair, Lime fertilizer manufacturing apparatus. 8. The method of claim 7,
The aging chamber includes:
An air plate provided inside the aging chamber to divide the space of the aging chamber into an upper portion and a lower portion;
An air nozzle provided at a lower portion of the aging chamber to inject air into the aging chamber;
At least one third agitator provided at a side of the air-tightening chamber for mixing the mixture of the stearic acid-coated quicklime and the fertilizer by-product into the aging chamber and the organic waste; And
And an exposing and discharging unit provided on a side surface of the aging chamber to discharge the mixed material from the aging chamber,
The air plate is provided so as to correspond to the transverse section of the aging chamber to divide the space of the aging chamber into an upper portion and a lower portion, and a metal plate made of stainless steel. The air plate has a plurality of holes therein. Passes through the hole of the air plate and is transferred to the upper portion of the aging chamber and forms a vortex by stirring the third agitator. A method for producing a lime fertilizer by using quicklime using the apparatus for producing lime fertilizer according to any one of claims 1, 3, 4, 5, 7, and 8,
Pulverizing the limestone to 10 μm or less, firing the obtained fine limestone at a temperature of 750-900 ° C. to produce calcium oxide (CaO), and coating the resulting calcium oxide with stearic acid using the retained heat;
Mixing the stearic acid-coated quicklime with gypsum (CaSO ₄ ), dolomite (CaMg (CO ₃ ) ₂ ), and crushed shell powder, which are by-products of fertilizer;
Preparing an organic waste;
Adding 30 to 50 parts by weight of organic waste to 50 to 70 parts by weight of the quicklime coated with the stearic acid;
Stirring while maintaining at room temperature;
Maintaining in air for 2 to 3 days at a temperature range of 20 DEG C to 25 DEG C; And
And pelletizing the raw lime. 10. The method of claim 9,
Wherein preparing the organic waste comprises:
A first drying step of mixing the food wastes with a moisture control agent to adjust the water content to 20 to 45 wt%;
A compression step of feeding the organic waste whose moisture content is controlled into a high-temperature and high-pressure mixing extruder; And
And a second drying step of drying and fermenting the organic waste having passed through the mixing extruder in a dry fermenter to adjust the moisture content to 10 to 30 wt%. 11. The method of claim 10,
Wherein the temperature of the mixed extruder is 100 to 350 DEG C and the pressure is 20 to 100 atm. The method of claim 1, wherein the moisture control agent is at least one selected from the group consisting of inorganic minerals, dried organic matter, corn, starch grains and by- Gt;

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