KR102229112B1 - Apparatus and Method for Pulverizing Shell - Google Patents

Abstract

The present invention relates to an apparatus and a method for shell pulverization. According to the present invention, shell pulverization in a cold state is performed by low-temperature freeze pulverization using low-temperature brittleness. As a result, the pulverization can be expedited, the efficiency of the pulverization can be enhanced, and pulverization equipment can be simplified and increased in size. The apparatus includes: a quantitative insertion machine performing preliminary cooling and quantitative transport on a shell inserted at the rear end, such that pulverization can be performed by low-temperature freeze pulverization using low-temperature brittleness; and a low-temperature freeze pulverizer performing low-temperature freeze pulverization using low-temperature brittleness on the preliminarily cooled shell supplied from the quantitative insertion machine. The low-temperature freeze pulverizer pulverizes the frozen shell by a ball mill method using a pulverization drum installed in a dust-proof outer tube to be rotatable. Shell powder which is pulverized and is smaller in size than through-holes in the pulverization drum is discharged to the outside of the pulverization drum.

Description

Shell crushing device and its method {Apparatus and Method for Pulverizing Shell}

The present invention relates to a shell pulverization apparatus and method thereof, and more specifically, by pulverizing shells in a cold state using a low-temperature freeze grinding method using low-temperature brittleness to shorten pulverization time, increase pulverization efficiency, and simplify, simplify and enlarge pulverization facilities. It relates to a shell crushing apparatus and a method capable of achieving.

In general, calcium is one of the elements constituting the human body, and is the fifth most frequently contained element after organic compounds composed of oxygen, carbon, hydrogen, nitrogen, etc., and is present in the largest amount among inorganic substances in the human body.

The action of this calcium in the human body is known as heart rate regulation, muscle and nerve activity, blood coagulation, enzyme activity, and cell membrane permeation enhancement. In particular, the importance of active calcium can be fully recognized as active calcium is widely distributed in soft tissues.

In addition, calcium that makes up bones is released into body fluids through the action of parathyroid hormone (PTH) and hydroxide vitamin D (activated vitamin D), and maintains the concentration of serum calcium at a certain level along with calcium absorbed from the outside. Calcium increases the excitability of nerves and muscles, causing stiffness (tetany), and hypercalcemia, on the contrary, is accompanied by systemic boredom and consciousness disorder.

However, a sufficient concentration of serum calcium is a widely known mineral that promotes bone growth through bone calcification and plays an absolute role in the activation of blood coagulation factors, and is widely added to various pharmaceutical supplements, food additives, and health supplements. It is commercially available.

Shells are collectively referred to as shellfishes that exist in freshwater and oceans such as freshwater shellfish, marine shellfish, abalone, shellfish, oysters, corals, and mussels.

Shell powder is a strong alkaline substance and contains a large amount of calcium. Strong alkali solution absorbs a large amount of oxygen to supply oxygen to the diseased cells, is involved in normalization of autoimmune function abnormalities through antioxidant activity, has the function of cell regeneration and pruritus improvement. It is painless, harmless and non-toxic even when it comes into contact with a wound. , It has strong sterilizing power and has a function of liquefying sulfur.

The main component of oyster shells is calcium carbonate (CaCO ₃ ), which contains about 95%, magnesium carbonate (MgCO ₃ ), and calcium sulfate (CaSO ₄ ) in small amounts.

Resources can be saved by using oyster shells discarded as garbage in oyster farms in the sea, and calcium carbonate (CaCO ₃ ) produced from oyster shells has excellent deodorizing and antibacterial effects.

In general, the main purpose of using shells of various shellfish is to use the stratum corneum, which is mainly composed of calcium carbonate.

Shells of all shellfish are based on an adult (成因) mechanism by spiral growth, and depending on the characteristics of the growth, it is sometimes easy to separate the stratum corneum and the stratum corneum. For example, oysters and tympanic shells can be separated by physical methods because the stratum corneum and the stratum corneum are layered.

On the other hand, ionized calcium is used in various fields such as food, pharmaceuticals, agricultural and livestock products, the environment, and in detail for various purposes such as soil improvement, water quality improvement, deodorization, sterilization, sterilization, and antibacterial. Ionized calcium is manufactured to facilitate absorption by ionizing calcium in order to provide high-purity calcium to the human body, agricultural and livestock products, and environment-related parts.

In order to prepare ionized calcium, limestone, elvanstone, shells, etc. have been simply pulverized or chemically reacted using an acid. However, the ionized calcium produced by such a manufacturing process has a low degree of ionization of calcium, so that the absorption rate is low, and there are problems such as side effects due to impurities such as incidental content.

In view of this, recently, the shells such as oyster shells, which contain large amounts of calcium and are easily supplied with raw materials, are plasticized using a kiln to remove and ionize toxic substances other than calcium, which is harmless to the human body and has a high calcium content. The production of high-quality ionized calcium is being made.

Korean Patent Laid-Open Publication No. 10-2009-0111528 (Patent Document 1) states that the content of calcium carbonate can be increased, the absorption rate of calcium can be increased, and the supplement containing calcium can be added to food to increase the intake rate of calcium. A food additive and a method for preparing the same are disclosed.

In Patent Document 1, quicklime or slaked lime obtained by firing oyster shells at 700~800℃ is used as a raw material and reacted with an aqueous ammonium nitrate solution to produce a calcium nitrate (Ca(NO ₃ ) ₂ ) aqueous solution, and an ammonium hydroxide (NH ₄ OH) aqueous solution. _{And reacting with carbon dioxide gas (CO 2} ) generated during firing of shellfish at a pH of 7 or higher and at -10 to 95°C to prepare calcium carbonate. Calcium carbonate thus prepared has a particle size of 0.5 to 10 μm.

Calcium oxide powder is prepared by washing the shell clean and firing it at a high temperature of 850°C or higher, so that _{CO 2} flies into the air and collects the remaining CaO by the reaction formula of _{CaCO 3} → CaO + CO _{2 so that it is well dissolved in water.} To do this), it is used after fine powdering.

In Korean Patent Publication No. 10-2009-0117322 (Patent Document 2), shellfish are heat-baked at a high temperature of 1,200°C for about 30 minutes, and the fired shells are allowed to stand for about 24 hours while gradually cooling in humid air. Disclosed is a method for producing calcium oxide including a method of separating and purifying impurities from the left shell powder by a sedimentation method.

In addition, Korean Patent Publication No. 10-1280803 (Patent Document 3) relates to a method for producing a functional shell fine powder that radiates far-infrared rays and has excellent antibacterial and deodorizing properties, and includes a shell washing step and heat treatment of the washed shell. The shell heat treatment step, the first crushing step of crushing the heat-treated shell, the heavy metal removal step of removing heavy metals while second pulverizing the shell powder by the first pulverization, and the shell powder from which heavy metals have been removed are crushed to more than 1500 mesh. The third pulverization step; includes, and the heavy metal removal step further pulverizes the shell powder by rotating a rotary cylinder containing a ceramic ball and a magnet, while removing heavy metals contained in the shell powder through a magnet. It is disclosed.

The patent document 3 describes that the first grinding step is pulverizing the heat-treated shell into 10 to 50 mesh, the second pulverizing step is pulverized by employing a ball mill method using ceramic balls, and the third pulverizing step is an air flow pulverization method using air. As a result, a multi-stage pulverization method is disclosed in which a shell powder of a fine size is gradually produced over three steps of pulverizing the shell powder to 1500 mesh or more.

When the manufacturing method of Patent Document 3 is used, since the time required for each step is very long, it is impossible to process at least 20 tons or more per day per shell crushing device, and thus, it is difficult to process large-capacity at low cost.

As described above, in the case of manufacturing calcium carbonate, calcium oxide, or ionized calcium using the shells of Patent Documents 1 to 3, a process of sintering at high temperature after washing the shells is included. Therefore, in the methods of Patent Documents 1 to 3, a firing furnace for firing the shell is required, and harmful gases may be generated during firing.

In Korean Utility Model Publication No. 20-0470384 (Patent Document 4), by providing an inclined structure of the crushing housing and the crushing transfer unit, even if a large amount of shells are input at one time, the supply is made sequentially from the bottom of the crushing housing. The motor is not overloaded, and shells that cannot be crushed finely due to the structure of the deep and wide blade grooves increase the time for large particles to stay under the slope by the law of gravity through the blade grooves, and the shells are crushed small. After that, a shell crusher that is pulverized into smaller particles in this process is proposed by allowing the helical blade and the housing to pass through the narrow gap of the fixed cutter and to be gradually transported upward, thereby limiting the rapid transport.

Since the shell grinder of Patent Document 4 is a method of pulverizing the shell by a cutter rotated at room temperature, there is a problem in that large-capacity processing is difficult due to low pulverization efficiency.

In Korean Patent Publication No. 10-1555203 (Patent Document 5), the amount and size of shells injected for crushing, and the separation distance between a pair of rollers are automatically adjusted regardless of the presence or absence of foreign substances, thereby delaying the working time. A shell crushing device has been proposed that can prevent damage to equipment as well as prevent damage.

Since the shell grinder of Patent Document 5 is a method of pulverizing the shell by a pair of rollers rotating at room temperature, there is a problem in that the pulverization efficiency is low and large-capacity processing is difficult.

The shell crushing device of Patent Documents 4 and 5 has a problem in that it is not easy to move in a large-capacity shell crushing plant because noise is largely generated during the crushing operation of the shell.

Oyster shells are used as raw materials for various fillers, paper coatings, pigments, cosmetics, foods and pharmaceuticals, and are also used in the manufacture of _{calcium carbonate (CaCO 3 ).} In addition, efforts are being made to increase the amount of oyster shells recycled in construction materials and fertilizer factories, for oyster shells, but an effective mass-treatment plan has not yet been proposed.

As of 2012, about 900,000 tons of oyster shells are generated per year, and 700,000 tons of them are estimated to be discarded, and the discarded oyster shells are emerging as a subject of serious pollution and economic reevaluation. .

Moreover, oyster shells generated in large quantities due to the development of oyster farming technology, the increase of oyster farms and the increase in consumption due to low prices are acting as a heavy burden on each local government.

: Korean Patent Application Publication No. 10-2009-0111528 : Korean Patent Application Publication No. 10-2009-0117322 : Korean Registered Patent Publication No. 10-1280803 : Korean Utility Model Publication No. 20-0470384 : Korean Registered Patent Publication No. 10-1555203

Oyster shells, which generate the largest amount among shells, are required to be treated without generating noise or environmental pollution in the surrounding environment at low cost as well as large-capacity treatment.

In consideration of these points, the present invention uses low-temperature brittleness (a property that is remarkably brittle against impact when cooled below the embrittlement point) instead of the high-temperature sintering process of shells that cause environmental pollution. The present invention was conceived by focusing on the fact that various scrapped shells can be easily pulverized.

The present invention was derived to solve the above problems, and its object is to shorten crushing time, increase crushing efficiency, and simplify and simplify crushing equipment by pulverizing shells in a cold state in a low-temperature freeze crushing method using low-temperature brittleness. And it is to provide a shell crushing apparatus and a method capable of increasing the size.

Another object of the present invention is to avoid generating harmful gases or harmful substances harmful to the environment by applying a low-temperature freeze grinding method using dry ice or liquefied gas instead of applying heat to the pretreatment process of the shell. It is to provide an environmentally friendly shell crushing device and method thereof.

Another object of the present invention is to form a drum in which a ball mill is crushed into a polygonal barrel by combining a plurality of assembly plates, and each assembly plate is formed in a dual structure having a base plate made of metal and a shock absorbing plate made of synthetic resin. It is to provide a shell crushing apparatus and a method thereof employing an assembled crushing drum that can absorb impact noise and can be easily maintained.

Another object of the present invention is to provide a shell pulverization apparatus and method capable of preventing external leakage of dust generated during shell pulverization by installing a dust collector for separating and expelling finely pulverized substances generated inside the pulverizing apparatus. .

Another object of the present invention is a shell pulverization device capable of being pulverized in an eco-friendly manner without generating noise or environmental pollution in the surrounding environment by providing a dustproof outer cylinder that is easily soundproof and shock absorbed on the outside of the pulverizing drum, and It is in providing that way.

Another object of the present invention is to provide a shell crushing device and a method thereof, which can be built in a low-temperature freezing grinder in a container box, thereby minimizing the generation of noise, and allowing easy movement and circulating work while moving to the main occurrence area of the shell.

The shell pulverization method according to an embodiment of the present invention includes a pre-cooling step of pre-cooling and transferring the injected shell to be crushed by a low-temperature freezing pulverization method using low-temperature brittleness in a low-temperature freezing pulverizer at a later stage through a quantitative injector; And a low-temperature freeze grinding step of grinding the pre-cooled shell by a low-temperature freeze grinding method using low-temperature brittleness.

In the low-temperature freeze-grinding step, a low-temperature freeze-grinding machine may be used that includes a ball mill type pulverizing drum rotatably installed inside the vibration-proof outer cylinder and pulverizes the shells frozen at low temperature.

Moreover, the pulverizing drum rotates at one end by being rotatably supported between the inlet side plate of the vibration-proof outer cylinder and the metering injector, and the other end is connected to the drive shaft rotatably supported by the rear end side plate of the dust-proof outer cylinder. Can be.

The cooling for the low-temperature freeze pulverization may be performed by injecting the cooled liquefied gas into the metering dispenser and the low-temperature freeze-grinding machine, or inserting a piece of dry ice.

In this case, the liquefied gas may be supplied through a rotating shaft of a quantitative injector, and the dry ice pieces may be supplied together with the shell through a quantitative injector.

In addition, the temperature of the low-temperature freeze grinding step may be set in the range of (-)1960 ℃ to (-)5 ℃.

The low-temperature freeze grinding step may be performed in a dry ball mill method incorporating a plurality of grinding spheres having a diameter in the range of 20 to 100 mm.

The shell pulverization method according to the present invention comprises the steps of first pulverizing the shells frozen at low temperature with a pulverizing drum of a ball mill method, and then second pulverizing the first pulverized shell powder with a pulverizing drum of a wet ball mill method. It may further include.

In the shell pulverization method according to the present invention, the pulverizing drum is composed of a polygonal drum having at least one perforated plate having a plurality of through holes through which pulverized shell powder can be discharged, and the shell is caused by rotation of the pulverizing drum. After being subjected to low-temperature freeze pulverization from the inside, when the perforated plate reaches the lowest point, the shell powder is discharged to the outside of the drum through the through hole; Introducing the shell powder discharged to the outside of the pulverizing drum into a powder transfer unit with an open top through a powder discharging slot formed at the bottom of the dustproof outer cylinder; And discharging the shell powder to the outside according to the driving of the powder transfer machine.

In this case, the diameter of the through hole may have the same diameter as the maximum size of the shell powder to be obtained.

The shell pulverization apparatus according to an embodiment of the present invention comprises: a metering dispenser for pre-cooling and quantitatively transferring the shell to be pulverized at the rear end by a low-temperature freezing pulverization method using low-temperature brittleness; And a low-temperature freezing grinder for pulverizing the pre-cooled shell supplied from the metering dispenser by a low-temperature freezing pulverization method using low-temperature brittleness, wherein the low-temperature freezing pulverizer includes a pulverizing drum rotatably installed inside the vibration-proof outer cylinder. The shells frozen at low temperature are pulverized using a ball mill method, and the shell powder pulverized to a size smaller than a plurality of through holes formed in the pulverizing drum is discharged to the outside of the pulverizing drum.

The low-temperature freezing grinder is a vibration-proof outer cylinder made of a cylindrical shape; A pulverizing drum having a plurality of through-holes through which the pulverized shell powder can be discharged, and a polygonal drum rotatably supported at both ends of the vibration-proof outer cylinder; A plurality of pulverizing ports which are put into the pulverizing drum and have different sizes; And a drum driving device for rotatingly driving a drive shaft connected to the rear end of the pulverizing drum, wherein the pulverizing drum is rotatably supported between the inlet side plate of the vibration-proof outer cylinder and the metering injector, The rear end may be rotated by being connected to a drive shaft rotatably supported on a side plate at the rear end of the vibration-proof outer cylinder.

In addition, the pulverizing drum includes a plurality of assembly plates each made of a rectangular plate; At least one perforated plate assembled together with the plurality of assembly plates to form a polygonal drum and having a plurality of through holes through which the pulverized shell powder can be discharged; And an assembly housing that is externally supported when the assembly plate and the perforated plate are assembled into a polygonal drum, wherein the shell is low-temperature freeze-crushed from the inside according to the rotation of the crushing drum, and then when the perforated plate reaches the lowest point. Shell powder may be discharged to the outside of the drum through the through hole.

Moreover, the assembly plate and the perforated plate are disposed inside, respectively, an impact absorbing plate made of synthetic resin to absorb noise caused by impact; And a base plate disposed outside the shock absorbing plate and made of a metal material.

In this case, in the perforated plate, the through-hole of the impact absorbing plate may be formed of an upper-lower narrow structure, and the base plate may be formed of a hole having the same diameter or upper-lower-lower structure.

The shell pulverization device according to the present invention comprises a slot for discharging the shell powder formed on the bottom of the vibration-proof outer cylinder and discharging the shell powder discharged to the outside of the pulverizing drum to the outside; And a powder transfer machine having a powder suction slot communicating with the powder discharging slot at the top of the housing, and transferring the shell powder injected into the housing to the powder discharging port.

The vibration-proof outer cylinder may have a structure in which a foaming agent is enclosed on the outside of a metal material for leakage of dust generated when the shell is pulverized in the drum while surrounding the pulverizing drum, and for sound insulation, shock absorption, and heat insulation.

In addition, the shell crushing apparatus according to the present invention further comprises a dust collector for collecting and removing fine powder of the shell powder floating in the vibration-proof outer cylinder, wherein the dust collector is a first connected to the upper portion of the vibration-proof outer cylinder. An axial flow type cyclone having a rotary rotor for evacuating the fine powder of shell powder floating inside the dustproof outer cylinder through a suction pipe and then discharging the sucked solid to the outside; A Roots blower for discharging only the gas flow sucked through the second suction pipe to the atmosphere of the fine powder passing through the axial flow type cyclone; And a suction and discharge silencer installed at the front and rear ends of the Roots blower, respectively, serving as a silencer.

The metering injector comprises a cylindrical housing; A rotation shaft installed inside the housing and rotated by a drive motor; And a spiral screw installed on the outer periphery of the rotating shaft, wherein the housing may include a refrigerant inlet into which a piece of dry ice is injected.

In addition, the metering injector includes a cylindrical housing; A rotation shaft installed inside the housing and rotated by a drive motor; And a spiral screw installed on the outer periphery of the rotation shaft, wherein the rotation shaft is formed as a hollow pipe, and a plurality of refrigerant ejection ports for injecting the refrigerant gas supplied from the cooling device into the housing may be formed in the pipe. have.

The shell pulverization apparatus according to an embodiment of the present invention comprises: a metering dispenser for pre-cooling and quantitatively transferring the shell to be pulverized at the rear end by a low-temperature freezing pulverization method using low-temperature brittleness; And a low-temperature freezing grinder for pulverizing the pre-cooled shell supplied from the metering injector by a low-temperature freezing pulverization method using low-temperature brittleness, wherein the low-temperature freezing pulverizer includes a vibration-proof outer cylinder having a cylindrical shape; A pulverizing drum having a polygonal drum in which both ends are rotatably supported inside the vibration-proof outer cylinder, and a perforated plate having a plurality of through-holes through which crushed shell powder can be discharged at at least one side of the polygonal drum ; A plurality of pulverizing ports which are put into the pulverizing drum and have different sizes; A drum driving device for rotatingly driving a drive shaft connected to the rear end of the pulverizing drum; A powder discharge slot formed on the bottom of the vibration-proof outer cylinder to discharge shell powder discharged to the outside of the pulverizing drum to the outside; And a powder transfer machine having a powder suction slot communicating with the powder discharge slot at the top and transferring the shell powder injected into the housing to the powder discharge port.

As described above, in the present invention, by pulverizing the shell in a cooled state by using a low-temperature freeze grinding method using low-temperature brittleness, it is possible to shorten the grinding time, increase the grinding efficiency, and simplify, simplify, and increase the size of the grinding facility.

When a material that is not easily pulverized at room temperature, such as a shell, is pulverized by cooling below the embrittlement point, high-efficiency pulverization can be achieved. In addition, the adoption of an impact type grinding method effective for brittle fracture by cooling the shell at a low temperature to embrittle it is preferable in terms of shortening the grinding time and grinding efficiency.

The shell pulverization device of the present invention can use dry ice as a refrigerant that can be purchased at an inexpensive price, so that 20 tons or more per day per shell pulverization device can be processed, and large-capacity processing can be performed at low cost.

In the present invention, by providing a dustproof outer cylinder that is easily soundproof and shock absorbed on the outside of the pulverizing drum, pulverization can be performed in an eco-friendly manner without generating noise or environmental pollution in the surrounding environment.

In addition, in the present invention, by installing a dust collector for collecting and removing finely pulverized substances generated inside the shell pulverizing device, it is possible to prevent external leakage of dust generated during shell pulverization.

Moreover, in the present invention, instead of applying heat to the pretreatment process of the shell, a low-temperature freeze grinding method using dry ice or liquefied gas is applied, so that harmful gases or harmful substances harmful to the environment are not generated. The shell can be crushed in an eco-friendly manner.

In the present invention, the drum on which the ball mill is pulverized is composed of a polygonal cylinder by combining a plurality of assembly plates, and each assembly plate is formed in a dual structure including a base plate made of metal and a shock absorbing plate made of synthetic resin, thereby reducing impact noise during the grinding operation. It can be absorbed and easy to maintain.

In the present invention, the low-temperature freezing grinder can be built into the container box to minimize noise generation and facilitate movement, so that circulation work is possible while moving to the main occurrence area of the shell.

1A to 1C are schematic cross-sectional views in the longitudinal direction each showing a shell crushing apparatus according to an embodiment of the present invention, and are enlarged views of portions X and Y of FIG. 1A.
Figure 2 is a schematic configuration diagram showing the configuration of the entrance of the shell crushing device according to the present invention and a dust collector is installed.
3A to 3D are enlarged cross-sectional views showing through-holes of an assembled plate, a perforated plate, and a perforated plate used in the pulverizing drum, respectively.
Figure 4 is a process diagram for explaining a shell crushing method of the shell crushing apparatus according to an embodiment of the present invention.
5A and 5B are photographs showing the shell to be crushed and the shell powder obtained by the shell crushing apparatus according to the present invention, respectively.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In this process, the size or shape of the components illustrated in the drawings may be exaggerated for clarity and convenience of description.

Hereinafter, a shell crushing apparatus device according to an embodiment of the present invention will be described with reference to FIGS. 1A to 2.

1A to 1C are schematic longitudinal cross-sectional views, respectively, showing a shell crushing device according to an embodiment of the present invention, an enlarged view of portions X and Y of FIG. 1A, and FIG. 2 is a view showing an entrance of the shell crushing device according to the present invention. It is a schematic configuration diagram showing a configuration in which a dust separator is installed.

1A to 2, the shell crushing apparatus 100 according to an embodiment of the present invention includes a hopper 12 for inputting a shell 10 that needs to be crushed and a refrigerant inlet 25 for introducing a refrigerant. And a quantitative injector 20 for pre-cooling while quantitatively injecting the shell 10 supplied from the hopper 12 into the low-temperature freezing grinder 30; A low-temperature freezing grinder for discharging the shell powder 11 by pulverizing the shell 10 in a cooled state in a low-temperature freezing grinding method using the low-temperature brittleness of the pre-cooled shell 10 supplied from the metering dispenser 20 ( 30); And a powder transfer device 50 for transferring the shell powder 11 pulverized by the low temperature freezing grinder 30 to the powder outlet 56.

The shell 10 that can be crushed in the shell pulverization device 100 of the present invention may include freshwater and marine shellfish such as freshwater shellfish, marine shellfish, abalone, shellfish, oysters, corals, mussels, etc. Does not limit the type of.

Although the shells of oysters and clams are widely used as raw materials for various fillers, construction materials and fertilizers, paper coatings, pigments, cosmetics, foods and pharmaceuticals, the annual generation exceeds the recycled amount significantly, damaging the natural environment of the main production area. I'm doing it.

The shell 10 injected into the hopper 12 of the shell crushing device 100 of the present invention performs a water washing step for the purpose of removing foreign substances such as dust, soil, and seaweed adhering to the outer surface and reducing salt content. It is desirable to go through it.

The hopper 12 can be equipped with a device for supplying an appropriate amount to prevent malfunction of equipment due to oversupply.

The metering dispenser 20 is to prevent a large amount of shells 10 from being injected into the low temperature freezing grinder 30 at one time, and is spirally on the outer periphery of the rotating shaft 21 that is rotatably supported inside the housing 24. The screw 22 is installed and rotates the rotating shaft 21 by rotational driving of the externally installed driving motor 23.

When the rotation shaft 21 is rotated by the rotational drive of the drive motor 23, the quantitative feeder 20 quantitatively feeds the shell 10, which is injected into the hopper 12, into the low-temperature freezing grinder 30, as a quantitative feeder. Plays a role.

The metering injector 20 is a spiral conveyor facility, so that the spiral screw 22 transfers the shell 10 to the low temperature freezing grinder 30 by receiving an appropriate supply amount set in advance. The distance between teeth) is set to be longer.

In this case, the quantitative injector 20 may use dry ice in the form of a piece as a refrigerant that can be purchased at an inexpensive price for preliminary cooling of the shell 10, and is mixed with the shell 10 through the refrigerant inlet 25. The shell 10 is pre-cooled.

The embodiment of the shell grinding device 100 shown in FIGS. 1A to 2 illustrates the use of dry ice in the form of a piece as a refrigerant, and the internal structure of the metering dispenser 20 and the low-temperature freezing grinder 30 is not changed. It is a method that can be easily cooled to a desired temperature below the brittle point while simplifying it.

The internal temperature of the low temperature freezing grinder 30 can be maintained at a desired indoor temperature by adding a predetermined amount according to the detection of the indoor temperature of a thermometer (not shown) installed inside the low temperature freezing grinder 30. It is preferable that the housing 24 of the metering dispenser 20 and the outer cylinder 31 of the low temperature freezing grinder 30 are covered with a heat insulating material to maintain the temperature inside the housing.

However, the shell pulverization apparatus 100 of the present invention uses a refrigerant gas instead of a method of using dry ice in the form of a piece to cool the internal temperature of the low temperature freeze crusher 30 to below the embrittlement point of the shell 10 to be crushed. It is also possible to adopt a refrigerant gas injection method for injecting into the low-temperature freezing grinder 30 and a refrigerant circulation method in which a cooling pipe through which the refrigerant is circulated is installed inside the low-temperature freezing grinder 30 and the cooled refrigerant is circulated.

When the refrigerant gas injection method is applied to the quantitative injector 20, the rotating shaft 21 is configured as a hollow pipe, and the cooled refrigerant gas supplied from the cooling device is supplied to the rotating shaft 21 of the quantitative injector 20. A plurality of refrigerant ejection ports for spraying into the housing 24 may be formed. When the refrigerant gas is injected into the housing 24 through the plurality of refrigerant ejection ports, heat conduction of the spiral screw 22 and the refrigerant gas from the refrigerant ejection port are directly transferred to the shell 10 to provide cooling.

In addition, if a plurality of refrigerant outlets are formed by extending the rotary shaft 21 made of a hollow pipe into the pulverizing drum 32 of the low-temperature freezing grinder 30, the pulverizing drum ( 32) It is also possible to cool the inside by using refrigerant gas.

Hereinafter, the low temperature freezing grinder 30 according to the present invention will be described in detail.

The low temperature freezing grinder 30 includes a vibration-proof outer cylinder 31, a pulverizing drum 32, and a drum driving device 40.

The vibration-proof outer cylinder 31 is a sealed type that surrounds the pulverizing drum 32 and prevents leakage of dust generated when the shell 10 is pulverized inside the drum, and is a foaming agent on the outside of the metal for sound insulation, shock absorption, and heat insulation. It can adopt a structure that surrounds.

In the present invention, by providing the closed-type dust-proof outer cylinder 31, it is possible to block the leakage of noise or dust into the surrounding environment, thereby preventing environmental pollution and pulverizing in an eco-friendly manner.

Left/right supports (13, 14) are installed at the lower sides of both sides of the vibration-proof outer cylinder (31) The low temperature freezing grinder 30 is supported at a certain height from the ground.

The vibration-proof outer cylinder 31 is provided with an inspection hole 39 and a monitoring window for checking the operation state of the pulverizing drum 32 installed inside the vibration-proof outer cylinder 31. The inspection hole 39 may have a structure capable of opening and closing.

The vibration-proof outer cylinder 31 may be formed in a cylindrical shape, and a first bearing 26a for rotatably supporting the inlet portion of the pulverizing drum 32 is installed on the inlet side plate 31a, and A second bearing 26b for rotatably supporting the pulverizing drum 32 is also provided between the inlet portion of the pulverizing drum 32 and the housing 24 of the metering dispenser 20.

The inlet side plate (31a) coupled to the inlet side of the vibration-proof outer cylinder (31) is the body of the vibration-proof outer cylinder (31) for maintenance of the crushing drum (32) built in the inside of the vibration-proof outer cylinder (31). Can be coupled to open and close.

In addition, a third bearing 37 for rotatably supporting the drive shaft 46 for rotating the pulverizing drum 32 is provided on the rear end side plate 31b of the vibration-proof outer cylinder 31. It is installed on.

Moreover, the vibration-proof outer cylinder 31 may have a rectangular structure in addition to a cylindrical shape.

The pulverizing drum 32 is made of a polygonal barrel, and a plurality of pulverizing spheres 38 having different sizes may be incorporated therein so as to pulverize the shell 10 in a dry ball mill method.

The pulverizing hole 38 inserted into the ball mill type pulverizing drum 32 may be made of, for example, metal, ceramic, mineral, or the like, and the ball size may be changed according to the diameter of the drum. In addition, the shape of the grinding sphere 38 may be formed in a polygonal shape in addition to the ball shape. In the pulverization hole 38, various kinds of balls of different sizes must be put together to obtain aggregates of different sizes evenly. The size of the grinding sphere 38 is required to have a diameter not smaller than the maximum size of the shell powder 11 to be obtained.

When metal is used as the grinding port 38, it is necessary to detect the iron powder using a magnet prior to the discharging step of the shell powder 11 in consideration of wear. In the case of ceramic grinding, there is a disadvantage of high material cost, and minerals (stone or marble, etc.) with low material cost have a problem of being crushed, but, for example, when using the shell powder 11 for compost or soil Doesn't matter.

The low temperature freezing grinder 30 finely pulverizes the pre-cooled shell 10, and the particle size of the shell powder 11 can be adjusted to a range of 1 mm or less. However, when the shell powder 11 is used for compost or soil, the particle size may be adjusted to a range of 1 mm or more.

The low temperature freezing grinder 30 can be applied to both a dry or wet ball mill, and the required grinding port 38 may vary depending on the size of the grinding equipment, and the diameter of the grinding port 38 is, for example, It can be used in combination with each size consisting of a range of 20 to 100 mm.

In addition, the pulverizing drum 32 may adopt a wet ball mill method other than a dry ball mill method, if necessary. The ball mill method of the pulverizing drum 32 and the material of the pulverizing sphere 38 may be selected according to the use of the shell powder 11 obtained by pulverizing the shell 10.

The pulverizing drum 32 may be formed of, for example, a polygonal drum including a hexagon, as shown in FIG. 2, or may be formed of a circular cylinder.

In this case, when the pulverizing drum 32 has a cylindrical shape such as a tumbler, a plurality of crushing openings 38 and shells 10 are transported upwardly according to the rotation of the crushing drum 32. A plurality of grinder guides may be installed horizontally at regular intervals on the inner wall of the drum. In this case, the pulverizing drum 32 may be set to have a length in proportion to the processing capacity.

The pulverizing drum 32, as shown in Fig. 2, is made of a polygonal (for example, hexagonal) barrel and a plurality of pulverizing holes 38 are accommodated therein, a body 32a, the body 32a It includes a cylindrical inlet (32b) connected to the cylindrical portion after narrowing toward the front from the front end of the body (32a) and a rear end side plate (32c) blocking the rear end of the body (32a).

A bearing housing (31d) protrudes in a cylindrical shape from the inlet side plate (31a) of the vibration-proof outer cylinder (31), and a first bearing (26a) is installed inside the cylindrical inlet (32b) to rotate. Support it. In addition, a sealing bracket 27 is assembled at the inlet of the bearing housing 31d to block the penetration of foreign substances into the first bearing 26a.

In addition, a second bearing (26b) is installed between the cylindrical inlet (32b) and the housing (24) of the metering dispenser (20) to rotatably support the grinding drum (32), and the inside of the second bearing (26b) A sealing member 28 is disposed to block various dusts from contaminating the second bearing 26b.

In addition, the rear end side plate 32c is fixedly coupled to the front end flange 46a of the drive shaft 46 and the bolt/nut fastening means 47.

2, when the body 32a is a hexagonal drum, the crushing drum 32 includes six assembling plates 82 in the interior of the assembling housing 80 with bolts/nuts at each corner. It can be configured in a manner of assembling by fixing in a fastening method.

As shown in FIG. 3A, the assembly plate 82 may have a double structure, and may include a rectangular base plate 82a made of a metal material and an impact absorbing plate 82b made of a synthetic resin. The shock absorbing plate 82b may be made of, for example, a synthetic resin such as urethane resin so as to absorb noise caused by the impact.

At least one of the six assembly plates 82 may be formed of a perforated plate 84 in which a plurality of through holes 33 are formed as shown in FIG. 3B.

In this case, in the perforated plate 84, as shown in FIG. 3C, the through hole 33 of the impact absorbing plate 82b forms an upper optical narrow structure, and the base plate 82a may form a hole having the same diameter.

In addition, as shown in FIG. 3D, the perforated plate 84 is formed so that the through-hole 33 of the impact absorbing plate 82b forms an upper optical lower narrow structure, and the base plate 82a is formed to form an upper-type light structure, and pulverized shell powder. (11) can be configured to be easily discharged.

As described above, the assembly plate 82 has a dual structure, so that the damaged shock absorbing plate 82b can be replaced with a new one if necessary.

In the present invention, the pulverizing drum 32 is made of a polygonal drum, and at least one perforated plate 84 is combined with a plurality of assembly plates 82 to be assembled into a polygonal shape. In this case, when the two perforated plates 84 and the four assembly plates 82 are combined to form a polygonal drum, the two perforated plates 84 may be disposed at positions opposite to each other.

The size of the through hole 33 may be set according to the size of the shell powder 11 desired. When the size of the hole 33 is set to, for example, 1 mm, the size of the shell powder 11 obtained by pulverizing the shell 10 is determined to be 1 mm or less. That is, the shell 10 injected into the pulverizing drum 32 is pulverized according to the rotation of the drum, and pulverization is continued until the size of the shell powder 11 becomes 1 mm or less.

The size of the shell powder 11 is determined according to the use, for example, when used as feed or compost, it may be determined to be 1 mm or more, and when used as an abrasive or food additive, it may be determined to be 1 mm or less.

The shell powder 11 passed through the through hole 33 formed in the perforated plate 84 of the pulverizing drum 32 and fell to the bottom 31c of the vibration-proof outer cylinder 31 is the bottom ( It is introduced into the powder transfer machine 50 with an open top through a slot for discharging powder (not shown) formed in 31c).

The powder transfer machine 50 has a powder suction slot in communication at the upper end so that the upper part of the housing 53 communicates with the powder discharge slot formed in the bottom 31c of the dustproof outer cylinder 31, and the housing 53 Inside, a spiral screw 52 is installed on the outer periphery of the rotation shaft 51 that is rotatably supported, and the rotation shaft 51 is rotated by rotational driving of a driving motor 55 installed outside.

The powder transfer machine 50 serves to discharge the shell powder 11 injected into the housing 53 through the powder outlet 56 when the rotation shaft 51 is rotated by rotational driving of the driving motor 55.

A magnet for removing iron contained in the shell powder 11 is installed at the outlet side of the powder transfer machine 50 as necessary, and an inspection hole 54 and monitoring for checking the discharge state of the shell powder 11 Windows can be installed.

The low-temperature freezing grinder 30 of the present invention includes a drum driving device 40 installed outside the vibration-proof outer cylinder 31 to drive the grinding drum 32 to rotate.

The drum driving device 40 may directly rotate the drive shaft 46 with a drive motor 55 or may be driven in one of a belt-pulley drive method. The embodiment shown in FIG. 1A is a case in which a belt-pulley driving method is applied.

The drum driving device 40 according to the belt-pulley driving method includes a driving motor 55, a first pulley 43 formed at the front end of the rotation shaft 42 of the driving motor 55, and the grinding drum 32 The second pulley 44 formed at one end of the drive shaft 46 connected to the rear end side plate 32c of the and a plurality of belts 45 for transmitting power between the first pulley 43 and the second pulley 44 ).

The drive shaft 46 of the drum driving device 40 uses a third bearing 37 installed in the bearing housing 37a of the rear side side plate 31b, and the rear side side plate 31b of the vibration-proof outer cylinder 31 ) Is rotatably supported.

In this case, a sealing member 39 is disposed inside the bearing housing 37a in which the third bearing 37 is embedded, to block various kinds of dust from contaminating the third bearing 37, and the bearing housing 37a ), a sealing bracket (37b) is installed at the rear end.

In the low-temperature freezing grinder 30 of the present invention, when the driving motor 55 is rotated, the rotational force is applied to the driving shaft 46 through a plurality of belts 45 connected between the first pulley 43 and the second pulley 44. Is transmitted to the pulverizing drum 32 to rotate.

Referring to FIG. 2, the shell crushing apparatus 100 according to the present invention includes a dust collector 70 outside the outer cylinder 31. The dust collector 70 includes an axial flow type cyclone 72 and a rotating rotor 73, and a Roots blower 78 in which suction and discharge silencers 79 are installed at the front and rear ends, respectively. .

The shell powder 11 is pulverized to a size of 1 mm or less inside the pulverizing drum 32 and discharged to the outside of the drum. Not) through the powder transfer machine (50).

However, the ultrafine powder of the shell powder 11 having a fine size in the form of dust is required to be separated and collected. For this purpose, a powder discharge prevention plate 34 is installed at intervals to block the discharge of the shell powder 11 having a fine size at a portion communicating with the inlet of the dust collector 70 at the outlet side of the dust-proof outer cylinder 31. Has been.

A suction pipe 71 is connected between the outlet of the dustproof outer cylinder 31 and the axial cyclone 72 of the dust collector 70, and the ultrafine powder of the shell powder 11 is dustproof according to the operation of the cyclone 72 The solid material is sucked from the outer cylinder 31 to the cyclone 72 and is separated by the rotary rotor 73 and discharged to the outside through the solid material discharge port.

The fine powder passing through the axial flow type cyclone 72 discharges only the gas flow sucked through the suction pipe 74 from the Roots blower 78 to the atmosphere. The ultra-fine dust discharged from the Roots blower 78 has the advantage of not discharging the final ultra-fine dust by spraying with high-pressure curtain type water. A suction silencer 77 and a discharge silencer 79 serving as silencers are installed at the front and rear ends of the Roots blower 78 to suppress noise generation.

As described above, in the low-temperature freezing grinder 30 according to the present invention, a vacuum generating device such as an axial flow type cyclone 72 is installed so that fine powder is sucked from the vibration-proof outer cylinder 31 and the fine powder is discharged to the outside by separating the solid material. It has the advantage of not being able to.

Hereinafter, the operation of the shell crushing apparatus 100 according to the present invention configured as described above will be described with reference to FIGS. 1A to 4.

The shell crushing device 100 of the present invention is first, after the shell 10 and dry ice pieces 15 washed with the hopper 12 and the refrigerant inlet 25 of the quantitative injector 20 are inserted (S11), the driving motor When the spiral screw 22 is rotated according to the rotational drive of 23, the shell 10 pre-cooled from the metering dispenser 20 together with a piece of dry ice 15, the pulverizing drum 32 of the low-temperature freezing grinder 30 ) Is supplied to the inside (S12).

The pulverizing drum 32 rotatably installed inside the vibration-proof outer cylinder 31 of the low-temperature freezing pulverizer 30 is rotated at a low speed by the drum driving device 40.

In this case, the cooled shell 10 rises together with the plurality of crushing openings 38 previously put in the pulverizing drum 32, and then falls while falling to the bottom 31c of the crushing drum 32. The shell 10 is crushed in a low-temperature freezing ball mill method in which 38 collides with the shell 10 and is crushed (S13).

The appropriate amount of the shell 10 to be put into the pulverizing drum 32 is greater than 1/3 of the drum capacity and less than 1/2, preferably about 2/5 of the drum capacity.

When the shell powder 11 of the shell powder 11 crushed by the crushing drum 32 has a particle size smaller than that of the powder discharge through hole 33 of the perforated plate 84 as described above, the perforated plate 84 It is discharged to the outside of the drum through the through hole 33 between the front and rear motions reaching the lowest point (S14).

In addition, the shell powder 11 discharged to the outside of the drum falls to the bottom 31c of the dustproof outer cylinder 31 and then is introduced into the powder transfer machine 50 with an open top through a powder discharge slot (not shown). do.

The shell powder 11 injected into the housing 53 of the powder transfer machine 50 is rotated by the rotational drive of the driving motor 55, and the shell powder 11 is rotated while the rotating shaft 51 and the spiral screw 52 are rotated. Is transferred to the powder discharge port 56 and discharged (S15, S16).

Before the shell powder 11 is discharged to the powder outlet 56, the Fe component powder may be removed while passing through a magnet for removing the Fe component installed at the outlet side of the powder transfer machine 50.

The shell powder 11 obtained through the powder outlet 56 is subjected to various tests to see if it meets a preset product standard, and if satisfied, it is packaged in a container (S17).

When the shell 10 is pulverized inside the pulverizing drum 32, the shell powder 11 discharged to the outside of the drum with a larger particle size falls to the bottom 31c of the dustproof outer cylinder 31, but ultrafine powder/ Dust is sucked into the axial cyclone 72 through the suction pipe 71 from the outlet of the dustproof outer cylinder 31 by vacuum suction by the axial flow type cyclone 72 (S21), and the solids are sucked into the rotary rotor 73. And discharged to the outside through a solids outlet.

In addition, the fine powder passing through the axial flow type cyclone 72 is discharged from the Roots blower 78 to the atmosphere only the gas flow sucked through the suction pipe 74, in this case, installed at the front and rear ends of the Roots blower 78 Noise generation can be suppressed through the suction silencer 77 and the discharge silencer 79 (S22, S23).

In general, the particle size of the shell powder 11 is required to be finely pulverized into micro- to nano-sized when it is to be used as a raw material for various paper coatings, pigments, cosmetics, foods and pharmaceuticals.

In addition, when used as a raw material for producing calcium carbonate, calcium oxide or ionized calcium, a shell powder of high purity is required.

When high-purity shell powder is required, for example, oyster shells, etc., are not suitable because it is difficult to clean foreign substances and the structure is soft. However, for example, after selecting a hard shell structure such as shellfish and coarsely pulverizing the obtained shell powder 11 with a first dry ball mill method with a first grinder, the obtained shell powder 11 is washed with water while washing with foreign matter powder, etc. Filtering and pulverizing the coarsely pulverized shell powder by a second wet ball mill method with a second pulverizer can easily obtain a high-purity shell powder of micro or nano size.

In the present invention, when producing the shell powder 11 by crushing the shell 10 in an eco-friendly manner, the shell 10 is a pretreatment process to increase the grinding efficiency, excluding heat to the production process or the use of chemicals. The grinding procedure is carried out in the state of cooling.

Therefore, in the present invention, the shell 10 is pulverized while actively suppressing heat generation during pulverization by using low-temperature brittleness (that is, the property is remarkably brittle against impact when cooled below the brittle point). By pulverizing the pulverization can be made much easier than pulverization at room temperature or heated state.

The quantitative dispensing machine 20 is a pretreatment process to shorten the crushing time and increase crushing efficiency. A large amount of shells 10 at a time to prevent equipment failure due to oversupply while cooling the shells 10 in advance is a low-temperature freezing grinder. (30) to prevent input.

The low temperature freezing grinder 30 pulverizes the shell 10 in a ball mill method in a cooled state using low temperature brittleness, and proceeds low temperature freezing pulverization in which heat is actively suppressed and pulverized.

When a dry ball mill is applied, the low-temperature freeze pulverizer 30 is a shell powder from the shell 10 due to impact and friction caused by a drop of the pulverizing sphere (ball) 38 rotated inside the drum when a dry ball mill is applied. 11) can be obtained.

The cooling method of the quantitative injector 20 and the low-temperature freezing grinder 30 is to insert dry ice in the form of pieces illustrated in FIG. 1 or the refrigerant cooled from the cooling device to the quantitative injector 20 and the low-temperature freezing grinder. (30) Various methods such as air-cooled or gas-cooled injection into the interior can be applied.

In this case, in the case of gas cooling, a refrigerant delivery pipe connected to a cooling device is installed inside the quantitative injector 20 and the low-temperature freezing grinder 30, and the inside of the quantitative injector 20 and the low-temperature freezing grinder 30 by direct cooling or subcooling. Can be cooled.

In addition, a refrigerant delivery pipe connected to a cooling device and a plurality of nozzles connected thereto are installed inside the quantitative injector 20 and the low-temperature freezing grinder 30, and refrigerant such as cooled air or liquefied gas is sprayed through the plurality of nozzles. The interior can be cooled in such a way. In this case, as the liquefied gas, liquefied nitrogen (-196°C), liquefied oxygen (-218°C), and freon may be used.

The cooling method for the metering dispenser 20 and the low-temperature freezing grinder 30 shown in FIGS. 1A to 2 is a dry ice injection method, and a dry ice having a cooling temperature of (-)78.5°C is used in a predetermined size. After pulverizing into pieces with a furnace, a desired indoor temperature can be maintained by adding a predetermined amount according to the indoor temperature of the metering dispenser 20 and the low-temperature freezing grinder 30.

The cooling temperature of the metering injector 20 and the low temperature freezing grinder 30 is set in the range of (-)196°C to (-)5°C, and in terms of grinding time and grinding efficiency, (-)40°C to (-) The 35°C range is preferred.

In addition, as the cooling method of the quantitative injector 20 and the low-temperature freezing grinder 30, a method of injecting dry ice pieces and a method of injecting a refrigerant such as cooled air or liquefied gas may be mixed.

Moreover, when the low temperature freezing grinder 30 is designed to have a long length to increase the processing capacity, a method of mixing dry ice input and refrigerant gas cooling may be applied, and in this case, the interior of the low temperature freezing grinder 30 goes toward the rear end of the low temperature freezing grinder 30. The problem of temperature drop can be easily prevented.

In addition, in the present invention, when the dry ice flakes input method is selected as the cooling method of the low-temperature freeze crusher 30, the gas pressure of carbon dioxide generated by the sublimation of the dry ice is determined by the shell powder 11 having the through hole 33 It acts as a powder discharge pressure that is discharged to the outside of the pulverizing drum, thereby inducing the discharge of the shell powder 11 naturally.

When the shell powder 11 crushed in the pulverizing drum 32 is quickly discharged to the outside of the drum, the pulverization efficiency of the shell can be further increased.

In the present invention, a temperature sensor is installed to sense the indoor temperature inside the metering dispenser 20 and the low temperature freezing grinder 30, and when the detected indoor temperature is lower or higher than a preset set temperature, a controller provided in the cooling device In this way, the indoor temperature can be constantly controlled by adjusting the amount of dry ice input or increasing or decreasing the input amount of liquefied gas.

The cooling method of the metering injector 20 and the low temperature freezing grinder 30 is not limited to the above method and may be selected in consideration of cooling efficiency, maintenance cost, and durability.

In addition, the optimal cooling temperature of the metering injector 20 and the low temperature freezing grinder 30 may be determined according to selection of a refrigerant and a cooling method, maintenance cost versus grinding efficiency, and processing capacity.

The low-temperature freezing grinder 30 of the present invention is a refrigerant spraying device for injecting a refrigerant supplied from a cooling device into the pulverizing drum 32 to cool the shell 10 injected into the pulverizing drum 32 It may include.

When adopting a method of injecting a refrigerant such as air or liquefied gas cooled by the above-described cooling method, the cooling device includes a bombe for storing liquefied gas inside the equipment relay housing, and liquefaction supplied from the cylinder to the refrigerant delivery pipe. Equipped with a refrigerant control panel with various control valves for controlling the supply amount and temperature of gas, a facility control panel with electronic components necessary for the overall electronic control of the shell pulverization device 100, and a power supply device for the electric motor of each facility. It may include a facility relay board, etc.

The facility control panel includes a system control program, a memory device for pre-storing a set value for process control for automatically maintaining the set temperature of the metering dispenser 20 and the low temperature freezing grinder 30, a microcontroller for signal processing, and a motor driving circuit. , A power supply, and the like, and controls the control valve of the refrigerant control panel, the drive motor 23 of the quantitative injector 20, and the drive motor 41 of the low temperature freezing grinder 30 to be described later.

On the other hand, the shell pulverization device according to the present invention has a structure that can be separated/coupled from the low-temperature freezing pulverizer 30 and the metering injector 20 installed at the front end of the low-temperature freezing pulverizer 30 and the drum driving device 40 installed at the rear end. If the low-temperature freezing grinder 30 is built into the container box, it is easy to move, and it is possible to circulate while moving to the main occurrence area of the shell. In addition, when the low-temperature freezing grinder 30 is a type built into a container box, noise generation and technology exposure can be minimized.

The low temperature freezing grinder of the present invention is interlocked according to the size of the drum, the rotational speed, the size of the grinder, and the like, and for example, the daily processing capacity may be set to about 25 tons.

5A and 5B show photographs of the shell to be pulverized and shell powder obtained according to the shell grinding apparatus of the low-temperature freezing ball mill grinding method according to the present invention, respectively.

The photograph shown in FIG. 5A is a photograph of an oyster shell to be pulverized before washing, and FIG. 5B is a shell pulverizing device with a through hole set to 1 mm in a perforated plate installed in a pulverizing drum, and the pulverized oyster shell powder is Represents a size of 1 mm or less.

In the present invention, the pulverization time can be shortened and the pulverization efficiency can be increased by pulverizing in a low-temperature freeze pulverization method that actively suppresses heat generation during pulverization in a cooled state using the low-temperature brittleness of the shell.

In addition, in the present invention, since the pretreatment process of applying heat to the shell is excluded, the shell powder can be produced in an eco-friendly manner in which no harmful gas or harmful substances harmful to the environment are generated.

In the above description of the embodiment, it is exemplified that a quantitative injector is installed at the front end of the low-temperature freezing grinder, but this is installed only for the purpose of pretreatment to shorten the grinding time and improve the grinding efficiency, and the present invention is not limited thereto. It is also possible to perform pulverization in a low-temperature freezing grinder without going through a metering machine.

In addition, in the above description of the preferred embodiment, a ball mill type pulverizer is used as a low-temperature freezing pulverizer, but the present invention uses a low-temperature brittleness to low-temperature freeze-grinding the shell 10 in a cooled state, a pair of rollers or rotation It is also possible to adopt a grinder using a cutter.

In the above, the present invention has been illustrated and described by way of example and description of specific preferred embodiments, but the present invention is not limited to the above-described embodiments, and common knowledge in the technical field to which the present invention pertains within the scope not departing from the spirit of the present invention. Various changes and modifications will be possible by those who have.

The present invention can be applied to the field of mass-producing shells in an eco-friendly manner.

10: shell 11: shell powder
12: hopper 13, 14: support
15: dry ice piece 20: quantitative dispenser
21,42,51: rotating shaft 22,52: screw
23,41,55: drive motor 24,53: housing
25: refrigerant input port 26a, 26b, 37: bearing
27,37b: sealing bracket 28,28a: sealing member
30: low temperature freezing grinder 31: external cylinder for vibration
31a: inlet side plate 31b, 32c: rear end side plate
31c: bottom 31d, 37a: bearing housing
32: grinding drum 32a: body
32b: cylindrical inlet 33: through hole for discharging powder
34: powder discharge prevention plate 38: grinding port
40: drum drive device 43, 44: pulley
45: belt 46: drive shaft
46a: flange 47: fastening means
50: powder transfer machine 54: inspection port
56: powder outlet 70: dust collector
71,74: suction pipe 72: cyclone
73: rotary rotor 77, 79: silencer
78: Roots blower 80: housing
82: assembly plate 82a: base plate
82b: shock absorbing plate 84: perforated plate
100: shell crushing device

Claims (20)

A pre-cooling step of pre-cooling and transferring the input shell so that it can be pulverized by a low-temperature freezing pulverization method using low-temperature brittleness in a low-temperature freezing pulverizer at a later stage through a quantitative injector; And
Including; a low-temperature freeze grinding step of grinding the pre-cooled shell by a low-temperature freeze grinding method using low-temperature brittleness,
The metering injector comprises a cylindrical housing; A rotation shaft installed inside the housing and rotated by a drive motor; And a spiral screw installed on the outer periphery of the rotation shaft,
In the cooling for the low-temperature freeze grinding, the shell grinding method in which a piece of dry ice is injected into the fixed-quantity injector and the low-temperature freeze-grinding machine through a refrigerant inlet provided in the housing. A pre-cooling step of pre-cooling and transferring the input shell so that it can be pulverized by a low-temperature freezing pulverization method using low-temperature brittleness in a low-temperature freezing pulverizer at a later stage through a quantitative injector; And
Including; a low-temperature freeze grinding step of grinding the pre-cooled shell by a low-temperature freeze grinding method using low-temperature brittleness,
The metering injector comprises a cylindrical housing; A rotation shaft installed inside the housing and rotated by a drive motor; And a spiral screw installed on the outer periphery of the rotation shaft,
The cooling for the low-temperature freeze pulverization is a shell pulverization method of injecting the cooled liquefied gas into the fixed-quantity injector and the low-temperature freeze-grinding machine through a plurality of refrigerant outlets of a rotating shaft made of a hollow pipe. delete The method of claim 1,
The shell pulverization method further comprising the step of first pulverizing the shell frozen at low temperature by a pulverizing drum of a ball mill method, and then second pulverizing the shell powder that has been pulverized by a wet ball mill pulverizing drum. The method of claim 1,
The low-temperature freeze pulverization step is a shell pulverization method using a low-temperature freeze pulverizer for pulverizing the shells frozen at low temperature and having a ball mill type pulverizing drum rotatably installed inside a vibration-proof outer cylinder. The method of claim 1,
The temperature of the low-temperature freeze crushing step is set in the range of (-)196 ℃ to (-)5 ℃ shell crushing method. The method of claim 6,
The low-temperature freeze grinding step is a shell grinding method comprising a dry ball mill method incorporating a plurality of grinding spheres having a diameter in the range of 20 to 100 mm. The method of claim 5,
The pulverizing drum is made of a polygonal drum having at least one perforated plate having a plurality of through holes through which pulverized shell powder can be discharged,
The shell is freeze-milled at a low temperature in accordance with the rotation of the pulverizing drum, and then the shell powder is discharged to the outside of the drum through the through hole when the perforated plate reaches the lowest point;
Introducing the shell powder discharged to the outside of the pulverizing drum into a powder transfer unit with an open top through a powder discharging slot formed at the bottom of the dustproof outer cylinder; And
Shell crushing method further comprising a; discharging the shell powder to the outside according to the drive of the powder transfer machine. The method of claim 8,
The shell pulverization method having the diameter of the through hole is the same as the maximum size of the shell powder to be obtained. Quantitative injector for pre-cooling and quantitatively transferring the shell to be crushed in a low-temperature freeze grinding method using low-temperature brittleness at the rear end; And
Includes; a low temperature freezing grinder for pulverizing the precooled shells supplied from the metering injector by a low temperature freezing grinding method using low temperature brittleness, and
The low-temperature freezing grinder pulverizes the shell frozen at low temperature in a ball mill method using a pulverizing drum rotatably installed inside the vibration-proof outer cylinder, and the shell pulverized to a size smaller than a plurality of through holes formed in the pulverizing drum The powder is discharged to the outside of the grinding drum,
The metering dispenser
Cylindrical housing;
A rotation shaft installed inside the housing and rotated by a drive motor; And
Includes; a spiral screw installed on the outer periphery of the rotation shaft,
The housing is a shell pulverizing device having a refrigerant inlet into which pieces of dry ice are injected. The method of claim 10,
The low temperature freeze grinder
A dustproof outer cylinder made of a cylindrical shape;
A pulverizing drum having a plurality of through-holes through which the pulverized shell powder can be discharged, and a polygonal drum rotatably supported at both ends of the vibration-proof outer cylinder;
A plurality of pulverizing ports which are put into the pulverizing drum and have different sizes; And
Includes; a drum driving device for rotationally driving a drive shaft connected to the rear end of the pulverizing drum,
The pulverizing drum is rotatably supported between the inlet side plate of the vibration-proof outer cylinder and the metering injector, and the rear end is connected to a drive shaft rotatably supported on the rear end side plate of the vibration-proof outer cylinder to rotate the shell pulverization. Device. The method of claim 11,
The grinding drum
A plurality of assembly plates each made of a rectangular plate;
At least one perforated plate assembled together with the plurality of assembly plates to form a polygonal drum and having a plurality of through holes through which the pulverized shell powder can be discharged; And
Includes; an assembly housing supported from the outside when the assembly plate and the perforated plate are assembled into a polygonal drum,
The shell pulverization apparatus in which the shell powder is discharged to the outside of the drum through the through hole when the perforated plate reaches the lowest point after low-temperature freeze grinding in accordance with the rotation of the pulverizing drum. The method of claim 12,
The assembly plate and the perforated plate, respectively,
A shock absorbing plate disposed inside and made of synthetic resin to absorb noise due to impact; And
Shell crushing apparatus comprising; a base plate disposed on the outside of the shock absorbing plate and made of a metal material. The method of claim 13,
In the perforated plate, the through hole of the impact absorbing plate is formed of an upper optical lower narrow structure, and the base plate is a shell pulverizing apparatus comprising a hole having the same diameter or upper narrow lower optical structure. delete The method of claim 10,
A powder discharge slot formed on the bottom of the vibration-proof outer cylinder to discharge shell powder discharged to the outside of the pulverizing drum to the outside; And
A shell pulverization device further comprising a powder transfer device having a powder suction slot in communication with the powder discharge slot at the top of the housing and transferring the shell powder injected into the housing to the powder discharge port. The method of claim 11,
A dust collector for collecting and removing fine powders of shell powder floating in the vibration-proof outer cylinder; further comprising,
The dust collector
An axial flow type cyclone having a rotary rotor for evacuating the fine powder of shell powder floating inside the vibration-proof outer cylinder through a first suction pipe connected to the upper part of the vibration-proof outer cylinder and then discharging the sucked solid to the outside;
A Roots blower for discharging only the gas flow sucked through the second suction pipe to the atmosphere of the fine powder passing through the axial flow type cyclone; And
Shell crushing device comprising a; suction and discharge sirens that are installed at the front and rear ends of the Roots blower, respectively, serving as a silencer. delete Quantitative injector for pre-cooling and quantitatively transferring the shell to be crushed in a low-temperature freeze grinding method using low-temperature brittleness at the rear end; And
Includes; a low temperature freezing grinder for pulverizing the precooled shells supplied from the metering injector by a low temperature freezing grinding method using low temperature brittleness, and
The low-temperature freezing grinder pulverizes the shell frozen at low temperature in a ball mill method using a pulverizing drum rotatably installed inside the vibration-proof outer cylinder, and the shell pulverized to a size smaller than a plurality of through holes formed in the pulverizing drum The powder is discharged to the outside of the grinding drum,
The metering dispenser
Cylindrical housing;
A rotation shaft installed inside the housing and rotated by a drive motor; And
Includes; a spiral screw installed on the outer periphery of the rotation shaft,
The rotating shaft is formed of a hollow pipe, and a plurality of refrigerant ejection ports for injecting the refrigerant gas supplied from the cooling device into the housing are formed in the pipe. delete

Images