KR102578005B1 - Sand manufacturing device using sea shell - Google Patents

Abstract

The present invention relates to a sand manufacturing device using shells, and more specifically, to shells as a raw material used in sand production, an input hopper including a feeder for supplying the shells in a fixed amount, and a device for transferring the shells supplied in a fixed amount from the hopper. A first transport means, which is a conveyor, a magnetic separation means located on the upper part of the first transport means to separate the first foreign substances with magnetism from the transported shells, and a magnetic separation means located on the other side of the first transport means, where the transported shells are put in and pulverized. a hammer crusher, a double screw cleaner for primary cleaning of shells crushed in the hammer crusher, and a second transfer screen located between the hammer crusher and the double screw cleaner to separate second foreign substances while moving the shells. Means, a cleaning and polishing drum for secondary cleaning and polishing of shells cleaned through the double screw cleaner, and a third transport means, which is a mesh-shaped conveyor belt located between the screw cleaner and the cleaning and polishing drum to move the shells. , Connected to one side of the rear end of the washing and polishing drum, tertiary washing and desalination of the secondary washed shells are performed, and the trommel including a first outlet and a second outlet and discharged through the first outlet of the trommel. It includes a fourth moving means, which is a conveyor belt that moves shells of 4 mm to 10 mm to a separate space for natural dehydration.

Description

Sand manufacturing device using sea shell}

The present invention relates to a device for producing sand by recycling shells, which are shells of shellfish, and a method for producing sand using the same.

In general, shells, which are discarded shells from shellfish such as oysters, cockles, scallops, and lilies, are designated as waste fishery by-products.

The main component of shells is CaCO3, which is the same as limestone, but most of it cannot be recycled and is left piled up near the ocean, such as on beaches, harming the surrounding landscape and causing environmental pollution by generating bad odors and leachate, and the number of civil complaints about this is increasing. there is.

In addition, as an example, in the case of Tongyeong, a city in South Korea, the oyster farming industry has developed and approximately 300,000 tons of oyster shells are generated per year. Although various recycling methods are used to dispose of oyster shells rather than leaving them unattended, only a portion is still processed, and the processing cost is high. There are problems that can only be dealt with with subsidies from the government or local governments.

Republic of Korea Patent Publication No. 10-0562354 discloses functional sand for high and early strength using recycled aggregate, shell, and waste hydrochloric acid, and a method for manufacturing the same.

Republic of Korea Patent Publication No. 10-2454146 discloses a method of manufacturing cat litter using waste shells.

Japanese Patent Registration No. 4411159 discloses a porous concrete molded body using shell.

Republic of Korea Patent Publication No. 10-1809171 discloses an eco-friendly block using tidal flat soil and shells.

However, since the conventional technology manufactures blocks, concrete molded bodies, etc. of a certain strength, additional additives are added in addition to shells, which has the disadvantage of complicating the configuration and process of the manufacturing equipment.

In addition, in the past, shells were recycled and used to manufacture petrified fertilizers, but since the salt contained in seawater cannot be properly washed, damage from salt damage occurs when used on crops, making it impossible to use large quantities of shells. There is a problem in that recycling of shells into quicklime consumes a large amount of energy due to the high temperature processing method, and there is a problem that there is no advantage in economic terms if subsidies are not provided.

In addition, when recycled with quicklime, CaCO3 decomposes and generates a large amount of carbon dioxide (CO2), which is a greenhouse gas that promotes global warming, so it is not helpful in terms of the environment.

Korean Patent Publication No. 10-0562354 Korean Patent Publication No. 10-2454146 Japanese Patent Publication No. 4411159 Korean Patent Publication No. 10-1809171

The present invention produces recycled sand through simple crushing and polishing of shells rather than thermal treatment, and aims to provide a sand production device and a production method using the same that can be produced at a significantly lower production cost than the production of petrified fertilizer or quicklime. It is done.

In the case of sand production through simple crushing, the crushed surface is sharp, so feet may be injured when recycled as beach sand, and when manufactured with cement blocks, the sharp edges collapse (break) first, lowering the compressive strength of the block. Therefore, its use for construction and civil engineering was inevitably restricted.

The present invention provides a device and method for cleaning and polishing sharp edges to make them round, so that sufficient compressive strength can be obtained even when used as beach sand or manufactured into blocks.

The present invention for achieving this purpose is a sand manufacturing device using shells, which includes shells as a raw material used in sand production, an input hopper including a feeder for supplying the shells in a fixed quantity, and a conveyor for transporting the shells supplied in a fixed quantity from the hopper. A first transport means, a magnetic separation means located on the upper part of the first transport means to separate the first foreign substances with magnetism from the transported shells, and a hammer located on the other side of the first transport means into which the transported shells are thrown and pulverized. A crusher, a double screw washer for primary cleaning of shells crushed in the hammer crusher, a second transport means, which is a vibrating screen located between the hammer crusher and the double screw washer to separate second foreign substances while moving the shells, A cleaning and polishing drum for secondary cleaning and polishing of shells cleaned through the double screw washer, and a mesh-shaped dehydration conveyor belt located between the double screw washer and the washing and polishing drum to move the shells while dehydrating them. A third transport means, connected to one side of the rear end of the washing and polishing drum, is used to perform tertiary washing and desalination of secondary washed shells, a trommel including a first outlet and a second outlet, and a first outlet of the trommel. It provides a sand manufacturing device using shells that includes a fourth moving means, which is a conveyor belt that moves the shells of 4 mm to 10 mm discharged through to a separate space for natural dehydration.

In addition, a second discharge port is located on the lower side of the trommel, and the trommel sprays high-pressure water inside while rotating a body with a plurality of punching holes to remove less than 4 mm of water generated during the polishing process in the washing and polishing drum. The shell particles may be discharged through the punching hole and then discharged through the second outlet.

In addition, the shell particles discharged through the second outlet of the trommel are discharged together with the washing water, and may further include an underwater classifier for separately classifying only sand of 0.1 mm or more.

A two-stage agitation reaction tank for agitating the washing water that has passed through the classifier with a coagulant, a sedimentation tank located at the rear of the agitation reaction tank for precipitation, a water filter, and a RO filter for producing fresh water located at the rear of the sedimentation tank. It may include a means of desalination.

In addition, the double screw cleaner can separate foreign matter (light foreign matter such as aquatic plants, wood chips, etc.) through a ring blower that supplies high-pressure air and bubbles into the workpiece, thereby separating the third foreign matter.

In addition, it may include a fifth transfer means, which is a dehydration screen for moving the third foreign material separated from the double screw washer while dehydrating it.

In addition, the classifier may include a sixth transfer means, which is a conveyor belt, for separating shell particles of 0.1 mm to less than 4 mm, a vibrating dehydrator for dehydrating the separated shell particles, and transporting the separated shell particles.

In addition, in the agitated reaction collection tank, the washing water and the coagulant are stirred to form floc, so that sludge can be precipitated as sediment in the settling tank.

In addition, the sedimentation tank includes a filter press for dewatering sludge, which is a precipitated sediment, and part of the washing water separated from the sediment can be moved to the first washing water storage tank for storage and part to the seawater desalination means.

Additionally, the washing water stored in the first washing water storage tank may be supplied to a double screw washer or a washing and polishing drum for reuse.

In addition, it may include a second wash water storage tank for storing the wash water purified through the seawater desalination means and a waste water storage tank for storing waste water.

Sand can also be produced using the apparatus described above.

Additionally, the sand may refer to pulverized shells or shell particles.

In addition, the present invention can be provided in various combinations of means for solving the above problems.

According to the present invention, recycling of shells has the effect of reducing environmental pollution.

In addition, there is no need for additional processing other than simple crushing and grinding, which is advantageous in terms of time and economy.

In addition, shells can be manufactured from sand and supplied to replace lost sand on the coast, contributing to maintaining the beach landscape and preventing sediment runoff.

In addition, it can be used to manufacture blocks or fish reefs.

In addition, since washing water is recycled, environmental pollution can be reduced and economical effects can be expected.

In addition, shell particles are discharged differently at each stage from one device, which has the effect of allowing it to be used for various purposes. The separately discharged coarse particles can be used to manufacture water-permeable sidewalk blocks, and can also be used to manufacture porous fish reef blocks so that seaweed can easily grow.

Figure 1 shows the configuration and sequence of a sand manufacturing device using shells, which is an embodiment of the present invention.
Figure 2 shows the inside of a washing and polishing drum in the construction of a sand manufacturing device using shells, which is an embodiment of the present invention.

Hereinafter, with reference to the attached drawings, an embodiment in which the present invention can be easily implemented by those skilled in the art will be described in detail. However, when explaining in detail the operating principle of a preferred embodiment of the present invention, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the gist of the present invention, the detailed description will be omitted.

In addition, the same reference numerals are used for parts that perform similar functions and actions throughout the drawings. Throughout the specification, when a part is said to be connected to another part, this includes not only cases where it is directly connected, but also cases where it is indirectly connected through another element in between. Additionally, including a certain component does not mean excluding other components unless specifically stated to the contrary, but rather means that other components may be further included.

In addition, limitations or additions to an embodiment in this specification not only apply to a specific embodiment, but may also be equally applied to other embodiments.

In addition, throughout the description and claims of the present invention, the singular number also includes the plural unless otherwise specified.

The present invention will be described in detail with reference to the drawings.

Figure 1 shows the configuration and sequence of a sand manufacturing device using shells, which is an embodiment of the present invention, and Figure 2 shows the interior of a washing and polishing drum among the configurations of a sand manufacturing device using shells, which is an embodiment of the present invention. .

The present invention is a device for manufacturing sand using shells, which includes shells (10), which are raw materials used in sand production, an input hopper (20) including a feeder (21) for supplying the shells in a fixed quantity, and transporting the shells supplied in a fixed quantity from the hopper. A first transport means (1001), which is a conveyor for A hammer crusher 30 into which the transferred shells are input and crushed, a double screw washer 40 for primary cleaning of the shells crushed by the hammer crusher, and a hammer crusher located between the hammer crusher and the double screw washer while moving the shells. A second transfer means (1002), which is a vibrating screen for separating second foreign substances, a cleaning and polishing drum (50) for secondary cleaning and polishing of shells cleaned through the double screw cleaner, and the double screw cleaner and the cleaning and polishing device. The third transport means (1003) is a dewatering mesh-shaped conveyor belt located between the drums for moving the shells, and is connected to one side of the rear end of the washing and polishing drum to perform third washing and desalinization of the second washed shells. , a trommel 60 including a first outlet and a second outlet, and a fourth conveyor belt that moves the shells of 4 mm to less than 10 mm discharged through the first outlet of the trommel to a separate space for natural dehydration. A sand manufacturing device using shells including a moving means (1004) is provided.

The double screw washer is formed of a first screw and a second screw so that cleaning can be performed while rotating.

Additionally, the first screw and the second screw may rotate in opposite directions or may rotate in the same direction.

Additionally, washing water for washing may be supplied to the washing and polishing drum.

In addition, shells of less than 4 mm to less than 10 mm discharged through the first outlet of the trommel can be stored by drying or naturally drying in a separate space, and the stored shells of less than 4 mm to less than 10 mm can be used as sand for producing permeable blocks or reef blocks. It can be used as.

In addition, a second discharge port is located on the lower side of the trommel, and the trommel sprays high-pressure water inside while rotating a body with a plurality of punching holes to remove less than 4 mm of water generated during the polishing process in the washing and polishing drum. The shell particles may be discharged through the punching hole and then discharged through the second outlet.

Additionally, the high-pressure water may be washing water sprayed at high pressure.

Additionally, a separate pump and spray nozzle may be included to spray the washing water at high pressure.

Additionally, shell particles less than 4 mm discharged through the second outlet can be supplied to a classifier.

In addition, the shell particles discharged through the second outlet of the trommel are discharged together with the washing water, and may further include a classifier 70 for separately classifying only the sand.

Additionally, sand particles for separate classification may be 0.1 mm or more.

In addition, a stirring reaction tank 80 for stirring the washing water that has passed through the classifier with a coagulant, a settling tank 90 located at the rear end of the stirring reaction tank for precipitation, and a water filter (90) located at the rear end of the settling tank to produce fresh water. 100), and may include a seawater desalination means consisting of a RO filter (110).

Additionally, the water filter or RO filter may be formed in plural numbers.

Additionally, the RO filter may be a Reverse Osmosis filter, which is a filter using reverse osmosis.

In addition, the double screw washer can separate third foreign substances through specific gravity separation using a ring blower 41 that supplies high-pressure air and supplied washing water.

In addition, it may include a fifth transfer means 1005, which is a dehydration screen for moving the third foreign matter separated from the double screw washer.

In addition, a turbid water storage tank in which used washing water is stored may be additionally included between the classifier and the mixing reaction tank.

Additionally, the washing water from which the second foreign matter has been separated may be transferred to a turbid water storage tank.

Additionally, the washing water that has passed through the turbid water storage tank may be moved to the agitation reaction collection tank.

In addition, the classifier separates and discharges shell particles of 0.1 mm to less than 4 mm, and may include a sixth transfer means 1006 for transporting the separated shell particles.

Additionally, the sixth transport means may be any one of a dehydration screen with a vibration function, a dehydrator, and a conveyor belt.

Additionally, the sixth transport means may be made of mesh.

Additionally, when the sixth transport means is a conveyor belt, a separate vibrating dehydrator may be installed on one side.

Additionally, the classifier may include at least one of a discharge hole or a separate discharge means to discharge the separated shell particles on one side.

Additionally, the second discharge port of the trommel may be a discharge conveyor.

Additionally, the discharge means of the classifier may be a discharge conveyor.

In addition, the separated shell particles of 0.1 mm to less than 4 mm can be dried or naturally dried and stored in a separate space, and the stored shell particles of 0.1 mm to less than 4 mm can be used as white sand beach sand or sand for block manufacturing. .

In addition, in the agitated reaction collection tank, the washing water and the coagulant are stirred to form floc, so that sludge can be precipitated as sediment in the settling tank.

Additionally, the sediment that settles in the sedimentation tank may be sludge.

In addition, the sedimentation tank includes a filter press 91 for dewatering sludge, which is a precipitated sediment, and the washing water separated from the sediment is partially transferred to the first washing water storage tank 120 for storage and partially to the seawater desalination means. can be moved

Additionally, the sludge, which is the precipitate, can be treated as waste, and for convenience, it can be stored and then disposed of in a separate space.

Additionally, the washing water stored in the first washing water storage tank may be supplied to be reused in one or more of a double screw washer or a washing and polishing drum.

Additionally, the washing water stored in the first washing water storage tank may be salt water.

In addition, it may include a second wash water storage tank 130 for storing wash water purified through the seawater desalination means and a waste water storage tank 140 for storing waste water.

Additionally, the washing water stored in the second washing water storage tank may be fresh water or purified water from which salts have been removed, and may be supplied to the trommel or washing and polishing drum.

Additionally, when the washing water stored in the second washing water storage tank is insufficient, water may be supplied from outside.

Additionally, the wastewater stored in the wastewater storage tank may be saline water.

In addition, the cleaning and polishing drum is provided with a plurality of ring-shaped partitions having concavo-convex wings along the long axis and hollows along the inner peripheral surface, and includes a plurality of steel balls inside to enable cleaning and polishing to proceed simultaneously.

In addition, the double screw washer can remove foreign substances such as mud, mud, and seaweed on the shell.

In addition, the interior of the double screw cleaner, cleaning and polishing drum, and trommel can be lined with a highly wear-resistant material to extend the service life.

In addition, the steel ball rotates with the injected shell particles as the washing and polishing drum rotates, and can play the role of polishing sharp parts such as the edges of the shell particles through friction.

In addition, the concavo-convex wings may be shaped to increase the cleaning effect by contacting each other while turning over the shell particles, and steel or steel with high wear resistance may be used.

Additionally, the partition may serve to increase contact between the shell particles and the steel ball.

In addition, in order for the sand manufacturing device using the shell to operate organically, a separate pump may be included at the appropriate location.

In addition, the first transport means, the second transport means, the third transport means, the fourth transport means, the fifth transport means, and the sixth transport means may be installed at an angle to have an inclined surface, and may have a mesh to allow liquid to pass through. It may be in the form. This ensures that the shell, which is the object being transported, is smoothly transported and that liquid or foreign substances are separated during transport.

Additionally, washing water may be supplied to the double screw washer, trommel, and washing and polishing drum, and the washing water may be supplied at a rate of 18 to 36 ton/h.

Additionally, the sand may refer to pulverized shells or shell particles.

Sand can also be produced using the apparatus described above.

In addition, those skilled in the art in the field to which the present invention pertains will be able to perform various applications and modifications within the scope of the present invention based on the above contents.

10: Shell
20: Input hopper
21: feeder
30: Hammer Crusher
40: Double screw washer
50: Washing and polishing drum
60: Trommel
70: Classifier
80: Communication and response group
90: Sedimentation tank
100: Water filter
110: RO filter
120: First washing water storage tank
130: Second washing water storage tank
140: Wastewater storage tank
1001: First means of transportation
1002: Second means of transportation
1003: Third means of transportation
1004: Fourth means of transportation
1005: Fifth means of transportation
1006: 6th means of transportation

Claims (13)

Shell, a raw material used to make sand;
An input hopper including a feeder for supplying the shells in a fixed quantity;
A first transport means, which is a conveyor for transporting the shells supplied in fixed quantities from the hopper;
A magnetic separation means located above the first transport means to separate the first foreign substances with magnetism from the transported shells;
A hammer crusher located on the other side of the first transport means into which the transported shells are input and crushed;
A double screw washer for primary cleaning of the shells crushed in the hammer crusher;
A second transfer means is a vibrating screen located between the hammer crusher and the double screw washer to separate second foreign substances while moving the shells;
A cleaning and polishing drum for secondary cleaning and polishing of the shells cleaned through the double screw cleaner;
A third transport means is a mesh-shaped conveyor belt located between the double screw washer and the cleaning and polishing drum to move the shells;
A trommel connected to one side of the rear end of the washing and polishing drum to perform tertiary washing and desalination of the secondary washed shells, and including a first outlet and a second outlet; and
It includes a fourth moving means, which is a conveyor belt that moves the 4 mm to 10 mm shells discharged through the first outlet of the trommel to a separate space for natural dehydration,
A second discharge port is located on the lower side of the trommel, and the trommel sprays high-pressure water inside while rotating a body with a plurality of punching holes to remove salts and remove salts generated during the polishing process in the washing and polishing drum. Shell particles less than 4 mm are discharged through the punching hole and then discharged through the second outlet,
The shell particles discharged through the second outlet of the trommel are discharged together with the washing water, and further include a classifier for separately classifying only sand of 0.1 mm or more,
A stirring reaction tank for stirring the washing water that has passed through the classifier with a coagulant;
A sedimentation tank located at the rear of the agitation reaction tank for precipitation;
It includes a seawater desalination means consisting of a water filter and an RO filter located at the rear end of the sedimentation tank to produce fresh water,
In the double screw washer, third foreign substances are separated through specific gravity separation using a ring blower that supplies high-pressure air and supplied washing water,
In the agitated reaction collection tank, the washing water and the coagulant are stirred to form floc, and the sludge is precipitated as sediment in the sedimentation tank,
The sedimentation tank includes a filter press for dewatering sludge, which is a precipitated sediment, and a portion of the washing water separated from the sediment is stored in a first washing water storage tank, and a portion is moved to the seawater desalination means. A sand manufacturing device using shells. .
delete delete delete delete According to paragraph 1,
A sand manufacturing device using shells including a fifth transfer means, which is a dewatering screen for moving the third foreign matter separated in the double screw washer.
According to paragraph 1,
The classifier is a sand manufacturing device using shells that separates shell particles of less than 0.1 mm to 4 mm, and includes a sixth transfer means for transporting the separated shell particles.
delete delete According to paragraph 1,
A sand manufacturing device using shells in which the washing water stored in the first washing water storage tank is supplied to be reused in one or more of a double screw washer or a washing and polishing drum.
According to paragraph 1,
A sand manufacturing device using shells, including a second washing water storage tank for storing washing water purified through the seawater desalination means and a waste water storage tank for storing waste water.
According to paragraph 1,
The cleaning and polishing drum is a sand manufacturing device using shells, which has a plurality of ring-shaped partitions with concavo-convex wings along the long axis and a hollow space along the inner peripheral surface, and includes a plurality of steel balls inside, so that cleaning and polishing are carried out simultaneously. .
A method of producing sand using shells, wherein sand is produced using the device according to any one of claims 1, 6, 7, and 10 to 12.