KR100868229B1 - Washing and foreign material removal method and the system of construction waste - Google Patents

Abstract

The present invention aims at efficient recycling of construction wastes, and is an invention for removing foreign matters mixed in recycled aggregates and selected soils (hereinafter referred to as "fine aggregates") during the construction waste treatment process.

The foreign material removal method is to put aggregate or sedimentary soil together with water into the aeration tank after crushing to obtain fine aggregates from construction waste. And only fine aggregate remains. Subsequently, a screw decanter is used to separate and sort water, foreign matter and fine particles, and discharge them to different outlets to be transported to the yard, and the water is transferred to a water storage tank and resupply. It is about providing the configuration and method.

The present invention having the above configuration has the advantage that it is possible to easily separate and recover fine aggregates by particle size separation of the circulating aggregate physically, the separated aggregates can be recycled to the aggregate of construction sites.

Construction waste, fine aggregate, aeration device, double cylinder, aeration filtration tank, screw decanter

Description

Washing and foreign material removal method and the system of construction waste

1 shows a process diagram.

2 shows an aeration tank.

3 shows a layout of the device according to the process.

       * Explanation of symbols for the main parts of the drawings

100: aeration filtration tank 101: outer filtration wall

102: support 103: horizontal filter wall horizontal row

104: outer filtration wall vertical line 111: inner filtration wall

112: support 113: inner tank

114: vertical filter wall vertical line 115: inner filter wall horizontal line

121: outer tank 122: air supply piping

123: aeration device 124: bottom

125: outlet 130: rim-type drainage pipe

131: bottom 132: outlet

200: screw decanter 201: strainer

300: storage water tank

160: 0.2 ~ 0.5mm filter net 170: circulating aggregate discharge device

The present invention relates to a method and apparatus for removing foreign matters from construction wastes so as to efficiently recycle construction wastes and effectively cope with resource shortages and environmental preservation.

In particular, the present invention collects and transports waste concrete, waste asphalt concrete, etc. generated in various construction and civil engineering construction sites, and foreign matters in the process of producing recycled aggregates using processes such as crushing and sorting in construction waste intermediate treatment plants. This is to remove by using an aeration tank, a screw decanter, dehydration of foreign matter and fines to obtain a good state for reuse or landfill.

In the past, various construction and civil works constructed by development priority policies and high-growth policies are subject to redevelopment, reconstruction, or dismantling of structures due to the aging and remarkable deterioration of their functions.

Generally, construction waste refers to recycled aggregates in which garbage and waste materials are mixed, recycled aggregates, gravel, earth, or recycled aggregates in which they are mixed, concrete lumps, waste wood, asphalt concrete lumps, and construction sludges. One of the main characteristics is that most of the construction waste is composed of inorganic material, which is harmless to the human body, and that various kinds of wastes are discharged in a mixed state, and the treatment is complicated and difficult. In the meantime, this may be the cause of indifference between the government and the industry regarding the disposal of construction waste, which can be used as a useful material.

Therefore, the proper management of these wastes enables the actual recycling, minimizing environmental pollution, replacing scarce resources, and reducing costs throughout the construction industry.
On the other hand, in Korean Patent Application Publication No. 10-2007-019780, which the applicant has applied for, the aeration filtration tank is composed of a first tank and a second tank, so that the aeration and separation are established. In the present invention, the first aeration filtration tank and the second aeration are set. The filter tank was integrated into one to make it more convenient.
In the existing invention, after the separation process by aeration and stirring for 20 minutes in the first aeration filtration tank, the aeration and separation in the second aeration filtration tank for 20 minutes and pumped with a decanter and inclined screen for final separation. The final sedimentation process took one hour. However, in the present invention, the foreign matter and clay silt during the process of aeration separation for 20 minutes in the aeration filtration tank, so that the aeration and separation in one aeration filtration tank at the same time for the purpose of reducing the time delay in each aeration filtration tank The sewage was transported to the decanter to operate the separation process within the time during which the aeration filtration tank was operated, thereby reducing the required time by 1/2 or more.

Existing technologies are composed of a process of separating foreign matters in the process of crushing waste concrete to separate particles by particle size, but the process is complicated and does not effectively remove foreign substances.

Therefore, this technology is intended to achieve environmentally friendly and more effective recycling technology through the removal of foreign substances and the simplification of the process.

Preferred embodiments of the present invention may be more specifically reproduced through the following description with reference to the accompanying drawings.

The configuration of the device is the filter wall is installed on the top of the aeration filtration tank 100 is composed of the inner filtration wall 111, the outer filtration wall 101, the tank consists of the inner tank 113 and the outer tank 121. As a double-cylindrical filter wall structure, the outermost portion is provided with a rim-type collecting and draining passage 130, and the outlet 125 for discharging the remaining washing aggregate is installed on the bottom surface of the outer tank 121, the inner tank 113 Is installed in the center of the outer tank 121, the end is connected to the screw decanter (200). In addition, aeration device 123 is installed on the bottom surface and the side of the outer tank to injure aggregate, foreign matter and fines, and to be washed and separated by the underwater injection pressure by aeration.

The detailed configuration of the device is as follows.

The lower body of the aeration filtration tank 100 is a double cylindrical tank having an outer tank 121 and the inner tank 113, the inner tank 113 inserted therein is cylindrical, having a separate outlet function at the bottom Form.
When the screening soil or fine aggregates to be washed and separated is put into the outer tank 121 of the aeration filtration tank 100 due to the vortices caused by the aeration pressure generated by immersion by the washing water supplied from the storage water tank 300 Residual foreign matter and small particles with a light specific gravity will rise. At this time, the small particulates to the inner filtration wall 111 of the inner tank 113 is transferred to the screw decanter 200 together with the water supplied to the washing water. Therefore, the drain pipe configured in the inner tank 113 should be installed to be connected to the screw decanter 200. That is, the upper portion of the inner tank 113 is installed in the center of the aeration filter tank 100 is the inner filtration wall 111 is installed using a rigid support 112, the lower portion of the inner tank 113 is aeration filtration Pass through the bottom of the water tank 100 to be connected to the screw decanter 200, but should be a pipe form of the material that can withstand the frictional force and pressure caused by the movement of the aggregate and water.
Outer water tank 121 is aeration device 123 is installed to allow the separation of floating by the aeration in the sediment or fine aggregates introduced into the lower and side.
That is, the aeration device 123 is installed on the side and bottom surface of the outer tank 121 of the aeration tank 100, is supplied from the air supply pipe 122 for supplying air to be sprayed in the water at a constant pressure . The air supply pipe 122 is installed in a multi-stage type to wrap around the aeration tank 100. In addition, the aeration device 123 is installed at a portion in contact with water corresponding to the inner surface of the air supply pipe 122. In addition, the aeration device 123 of the side portion is installed to have a constant inclination so that water flows in the clockwise direction in the water, the aeration device 123 of the bottom portion 124 is installed upward.

In addition, the drainage structure of the outer tank 121 is the foreign matter slurry filtered through the outer filtration wall 101 is collected in the rim-type collection drainage pipe 130, the bottom of the rim-type drainage pipe 130 is 5 It is inclined in the direction of the outlet so that the water flow is natural with a slope of more than degrees. Here, the frame-type drainage pipe 130 is the water and foreign matter, clay, silt, etc. that passed through the outer filtration wall 101 by the aeration pressure by the washing water and the aeration device 123 is supplied to the aeration filtration tank (100) Proper height should be set to prevent splashing by centrifugal force.

The sieve size of the inner filtration wall 111 and the outer filtration wall 101 forms a rectangular network of 0.3 mm in width and 100 mm in length to facilitate the filtration and discharge of foreign materials having a narrow and long length. The purpose of installing the inner filtration wall 111 and the outer filtration wall 101 in and out is to shorten the washing separation process. In addition, in order to prevent breakage of the filtration wall due to water pressure, supports 102 and 112 are provided at regular intervals.

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The bottom portion 124 of the aeration filtration tank 100 is inclined toward the outlet 125 at an intermediate point and has a function of inducing a smooth flow when discharging the remaining selected sediment or circulating aggregate. That is, when the bottom 124 is based on the two outlets 125, such as "~", the portion adjacent to the outlet is concave, the middle point is convex, and the adjacent portion that meets the outlet 125 again is It becomes concave.
The bottom part 124 of the aeration filtration tank 100 has an inclination in the direction of the outlet 125 from the middle point is that the bottom of the aeration filtration tank 100 is convex and concave like a wave shape, the supplied washing water The flow of clay is not uniformly formed, and the clay lumps are more finely dispersed by the air pressure sprayed from the side and the lower surface while the particles flow up and down.

Method for cleaning and removing foreign substances of the aeration filtration tank 100 is configured as described above.

Dispersing by supplying the washing water so that the sedimented sediment or circulating aggregate introduced into the aeration filtration tank 100 does not stay in one place;

Operating the aeration apparatus 123 installed on the side and bottom of the outer tank 121 to smoothly injure or wash due to the injection pressure;

The step of allowing the foreign matter and fine particles to rise to the surface by the aeration pressure and to sink and rise again by Brown's movement force to the upper portion of the inner filtration wall 111 and the outer filtration wall 101, and filtered out ;

Foreign substances and fines discharged through the monthly and filtration are collected in the outside of the aeration-type collecting pipe passage 130 installed at the lower end of the aeration filtration tank 100 to be introduced into the screw decanter 200, and in the case of the inside, Collecting water into the water tank 113 to flow into the screw decanter 200;

Residual aggregate remaining on the bottom of the outer tank 121 after washing is discharged to the outlet (125), the supplying the washing water to help this, the aeration device is discharged and discharged and transport yard;

Water, foreign matters and fines introduced into the screw decanter 200 are discharged by centrifugal force, and the foreign matters and fines having a high specific gravity are dehydrated and discharged. And only the water is transferred to the storage water supply tank 300 through;

The water and the storage method of the storage water supply tank 300 and the method for cleaning and removing foreign substances of the construction waste, characterized in that the re-supplied as washing water.

The present invention having the above configuration has the advantage of maximizing the resource recovery efficiency as a method designed to separate and recover fine aggregates easily by washing the selected sediment and crushed aggregates generated in the construction waste treatment process.

Claims (4)

Inner filtration consisting of a double filtration wall which is separated and rises more finely by the pressure sprayed from the side part and the lower part when the particles dispersed while rising to the surface due to the aeration pressure are sinked and floated again by the Brownian motion force. Method for cleaning and removing foreign matters of the construction waste, characterized in that the filtered discharge and the overflow discharged through the wall 111 and the outer filtration wall 101 and discharged to the lower outlet. The double cylindrical aeration filtration tank 100 is the upper end is composed of the inner filtration wall 111, the outer filtration wall 101, the lower end is composed of the inner tank 113 and the outer tank 121. In addition, the outermost portion is provided with a rim-type collection and drainage pipe 130, the outlet 125 for discharging the remaining washing aggregate is installed on the bottom surface of the outer tank 121, aeration device 123 on the bottom and side of the outer tank ) Is installed, the inner tank 113 is installed in the center of the outer tank 121 and the end is connected to the screw decanter 200, the bottom surface of the outer tank 121 to discharge the remaining aggregate after washing Washing and debris removal device of construction waste, characterized in that to install two or more outlets (125) The method of claim 2, wherein the bottom surface of the rim-type drainage pipe 130 has a slope of 5 degrees or more installed in the outer bottom of the outer tank of the construction waste cleaning and foreign matter removal device According to claim 2, wherein the inner filtration wall 111 and the outer filtration wall 101 is a polyurethane rubber net installed on the upper end in a double cylinder structure, the graduation interval is formed to the size of 0.3mm horizontal, 100mm vertical Device for cleaning and removing foreign substances of construction waste

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