KR20030071254A - Method for separating light waste materials from construction waste - Google Patents

Abstract

PURPOSE: A method for separating and collecting suspended impurities contained in constructional wastes is provided to enable the selective extraction of waste concrete lumps only thus allowing the production of high quality regenerative aggregate. CONSTITUTION: The method for separating and collecting suspended impurities contained in constructional wastes comprises the steps of: dropping the constructional wastes; blowing wind toward the dropping wastes so as to separate the suspended impurities contained the wastes; immersing the dropped wastes so as to allow the impurities to be risen onto the water surface; generating one-way water currents so as to guide the impurities; injecting water to the moving impurities; and continuously supplying water so as to cause the collected impurities to be discharged along with the water.

Description

METHODS FOR SEPARATING LIGHT WASTE MATERIALS FROM CONSTRUCTION WASTE}

The present invention relates to a method for separating and collecting floating impurities of construction wastes, and more particularly, to a method for separating and collecting floating impurities of construction wastes, which improves the separation efficiency of suspended impurities contained in construction wastes, thereby producing high-quality recycled aggregates. It is about.

In recent years, a lot of construction wastes are generated as the reconstruction and extension of buildings, in particular, the reconstruction and redevelopment of large buildings such as apartments. Such construction waste is not only the main cause of environmental pollution, but also causes the waste of resources to increase the cost of construction aggregates.

On the other hand, in consideration of this, recently, the construction waste treatment method has been developed and practically used to minimize the environmental pollution and to significantly reduce the purchase cost of construction aggregates by treating construction wastes and recycling them into high-quality recycled aggregates. This construction waste treatment method, first, roughly shredding the construction waste, and then separated only the waste concrete mass from the impurity in the shredded construction waste, washed it, then shredded to a constant size, and sorted and recycled into good aggregate It has a configuration.

1 shows a configuration of a construction waste treatment system for executing such a construction waste treatment method, which will be described below with reference to a construction waste treatment method. First, the construction waste treatment system has a hopper 10 for introducing construction waste (hereinafter abbreviated as "waste") and a primary crushing unit 20 for crushing the introduced waste first. The primary shredding unit 20 is composed of a jaw crusher having a strong shredding ability, roughly crushed waste concrete lumps, reinforcing pieces, wood chips, waste paper, waste vinyl, plastic waste, etc. contained in the construction waste Plays a role.

In addition, the building treatment system includes a first transfer conveyor 30 which transfers the first crushed waste, and a metallic impurity separation collection unit 40 that separates the metallic impurities in the transferred waste. The metallic impurity separation collection unit 40 is a magnetic separator using an electromagnet, which is installed on the first conveying conveyor 30, and includes pieces of reinforcing bars, nails, and the like in the waste conveyed along the first conveying conveyor 30. It attracts and separates the same metallic impurities.

In addition, the construction waste treatment system includes a fine impurity separation and collection unit 50 for separating small and heavy micro impurities, such as soil and sand, contained in the waste, and also having a light weight in the waste. A floating impurity separation collection unit 60 for separating suspended impurities such as wood chips, waste styrofoam, waste paper, waste vinyl, waste plastic, and the like is provided. The fine impurity separation collection unit 50 uses a vibrating strainer 52, which vibrates waste conveyed from the first conveying conveyor 30 while lowering soil and sand contained therein. It serves to drop. Of course, the fine impurities dropped to the bottom is discharged to the outside through the second conveying conveyor (54).

On the other hand, the suspended impurity separation collection unit 60 is provided with a separation tank 62 for submerging the waste conveyed from the vibration strainer 52. The separation tank 62 serves to separate the wood chips, waste styrofoam, waste paper, waste vinyl, waste plastic, etc. contained in the waste by immersing the waste in water. In addition, the separation tank 62 also serves to wash the concrete from which the suspended impurities are separated. Here, the floating impurities floated on the water surface is configured to be discharged to the rear side of the separation tank (62).

The building waste treatment system includes a third conveying conveyor 64 for conveying the concrete from which the impurities are separated from the separating tank 62, and a secondary crushing unit 70 for crushing the conveyed waste concrete secondaryly. The third conveying conveyor 64 is installed to be inclined from the bottom of the separation tank 62 to serve to draw out the concrete mass precipitated in the separation tank 64 to the outside. The secondary crushing unit 70 is composed of a jaw crusher, and serves to crush concrete. Here, the secondary crushing unit 70 is disposed in two rows so as to crush the waste concrete sufficiently.

The building waste treatment system includes a fourth conveying conveyor 72 for conveying the crushed concrete, and a sorting unit 80 for sorting the conveyed concrete according to the size. In particular, the sorting unit 80 is a small particle recycled aggregate (G1) of approximately 5 mm or less by using the first, second, and third vibrating strainer having different sizes (stacked: 82, 84, 86). , 5-25 mm intermediate particle recycled aggregate (G2), and 25-40 mm large particle recycled aggregate (G3) serves to screen. Of course, the selected recycled aggregate (G1, G2, G3) is discharged to the outside through the fifth, sixth seventh conveying conveyor (82a, 84a, 86a).

In addition, the construction waste treatment system includes a bypass conveyor 90 for bypassing the coarse and large particles of concrete that have not been screened, a tertiary crushing unit 92 for crushing the bypassed concrete, and the crushed concrete again. The return conveyor 94 which returns to the 4th conveying conveyor 72 is provided. In particular, the tertiary crushing unit 92 is composed of a cone crusher (cone crusher) to enable the fine crushing of rough and large concrete.

In the construction waste treatment method using the treatment system having such a configuration, the introduced waste is first crushed, and then the metallic impurities, fine impurities and suspended impurities in the waste are separated and washed in sequence, and then finely crushed again. By sorting the final crushed concrete according to the size, the construction waste is recycled into good quality aggregate.

However, this conventional construction waste treatment method, there is a problem in that the separation efficiency of the suspended impurities in the process of separating and collecting the suspended impurities through the suspended impurities separate collection unit can not produce a high quality recycled aggregate.

That is, in the conventional method, the suspended impurities contained in the wastes are separated through the separation tank 62 of the suspended impurities separated collection unit 60. However, in the process of immersing the waste into the separation tank 62, the weight contained in the waste is light, but suspended impurities, such as waste paper, waste vinyl, and waste plastic, which are easily submerged in water do not float to the surface of the concrete. There was a problem with the transfer to the third transfer conveyor (64). As a result, the waste paper, waste vinyl, and waste plastic are mixed with the concrete mass and crushed without being separated from the concrete mass, resulting in incorporation into the recycled aggregate.

In addition, the conventional method is a problem that in the process of immersing waste in the separation tank 62, waste paper floating on the water surface, suspended impurities such as waste styrofoam are loaded on the third transfer conveyor 64, mixed with concrete and transported again. There was this. Of course, in view of this, after installing the water spray nozzle in the separation tank 62, by spraying the high pressure water with the water spray nozzle, and forming a water flow through the sprayed water by the impurity suspended from the third transfer conveyor (64) Spaced apart, and the suspended impurities are pushed out from the separation tank (62). However, such a method has a disadvantage in that it is insufficient to completely separate and separate the floating impurities from the third conveying conveyor 64, and thus, the separated floating impurities are mixed with the concrete mass again.

Accordingly, the present invention has been made to solve the above problems, and its object is to provide a method for separating and collecting floating impurities of building waste for efficiently separating the floating impurities that are easy to sink from the waste concrete mass.

Another object of the present invention is to provide a method for separating and collecting floating impurities of construction wastes to separate the floating impurities floating on the water surface from the conveying conveyor and to efficiently discharge the separated floating impurities from the separation tank.

1 is a plan view schematically showing the configuration of a general construction waste treatment system;

Figure 2 is a side view showing the configuration of a floating impurity separate collection unit for executing the method for separating the floating impurities of building waste according to the invention,

3 is a cross-sectional view taken along the line A-A of FIG.

4 is a cross-sectional view taken along the line B-B in FIG.

5 is a block diagram showing the configuration of a method for separating and collecting suspended impurities in construction waste according to the present invention.

♣ Explanation of symbols for the main parts of the drawing ♣

100: transfer conveyor 110: primary separation collection device

112: blower 114: blower duct

120: secondary separation unit 122: separation tank

124: reservoir 124a: discharge passage

125: feed pump 126: screw

127: drive motor 128: fluid pump

129: water spray nozzle 129a: connector

In order to achieve the above object, a feature of the present invention is a method for separating and collecting floating impurities of building wastes for separating suspended impurities contained in building wastes, the method comprising: dropping building wastes downward; Blowing wind to the falling building waste so as to blow off and separate the floating impurities contained in the building waste; Immersing the dropped construction wastes in water so as to float the floating impurities contained in the construction wastes on the surface of the building wastes; And causing water to be collected by moving the suspended impurity floating on the water to one side.

Hereinafter, with reference to the accompanying drawings, a preferred embodiment of the method for separating and collecting the floating impurities of building waste according to the present invention will be described in detail.

First, before describing the method for separating and collecting the floating impurities of the building waste according to the present invention, the floating impurities separating and collecting unit for executing the method for separating and removing the floating impurities of the present invention will be described in detail. . As shown in FIG. 2, the floating impurity separation collection unit for carrying out the present invention includes a conveying conveyor 100 for raising a largely crushed waste to a predetermined height, and floating in waste falling from the conveying conveyor 100. The primary separation collection device 110 for separating and collecting the material first, and the secondary separation collection device 120 for separating and collecting the suspended matter contained in the waste secondary.

The conveying conveyor 100 serves as a belt conveyor, which firstly raises the waste crushed to a predetermined height and then drops it to a lower portion. The transfer conveyor 100 may use the first transfer conveyor 30 of the building waste treatment system shown in FIG. 1 as it is, or install a separate transfer conveyor 100 and the first transfer conveyor 30. Can also be used in conjunction.

The primary separation collection device 110 is installed in the lower portion of the conveying conveyor 100, and has a blower (112). Blower 112 blows a strong wind to the waste falling from the conveying conveyor 100, the suspended impurities contained in the waste, that is, waste paper, waste vinyl, waste plastic. Used to separate waste styrofoam from waste. The blower 112 is configured to have a high capacity so as to blow out relatively heavy floating impurities, for example, waste paper, waste vinyl, and waste plastic, and thus, removes the floating impurities that are easy to sink in water in advance. Will be

On the other hand, the primary separate collection device 110 is provided with a blowing duct 114 for guiding the wind of the blower 112 so that the wind generated from the blower 112 can be intensively blown to the falling waste. Blowing duct 114 is disposed in front of the blower 112, the waste falling from the conveying conveyor 100 to pass through the blowing duct 114 to fall into the vibrating strainer 52 of the fine impurity separation collection unit 50 The through hole 114a is formed so that it may be. In addition, the end of the blowing duct 114 is configured to extend toward the separation tank 122 of the secondary separation collection device 120 to be described later to discharge the floating impurities separated from the waste to the separation tank 122. It is composed.

The primary separation collection device 110 of such a configuration is to collect the impurities contained in the waste primarily through the wind of the blower 112, thereby collecting impurities contained in the waste, in particular, waste paper that is easy to sink in the water, waste It effectively separates and removes vinyl and waste plastic. In addition, by discharging the separated suspended impurities through the blowing duct 114 to the separation tank 122, the separated suspended impurities are not mixed back into the waste.

Referring back to Figure 2, the suspended impurities separate collection unit is provided with a secondary separation collection device (120). The secondary separation collection apparatus 120 separates and collects relatively light floating impurities from the waste, and has a separation tank 122. As shown in FIG. 3, the separation tank 122 has an upper storage tank 124, and one side of the upper end of the storage chamber 124 allows the water stored in the storage chamber 124 to be discharged. The discharge passage 124a is formed.

The separation tank 122 floats the floating impurities such as wood chips, waste styrofoam, waste paper, waste vinyl, waste plastic, etc. contained in the waste by submerging the waste transported through the vibrating strainer 52 to the water. I play a role. Here, as well as the water is continuously supplied to the separation tank 122 by the water supply pump 125, the supplied water is configured to be discharged to the outside through the discharge passage (124a). In addition, a third transfer conveyor 64 is inclined toward the opposite direction of the discharge passage 124a in the storage chamber 124 of the separation tank 122 to store the waste concrete mass that has sunk to the bottom of the storage chamber 124. (124).

On the other hand, the secondary separate collection device 120 is provided with a water generating means for generating a flow of water so that the water stored in the reservoir 124 flows toward the discharge passage (124a). 3 and 4, the water generating means includes a screw 126 disposed in the reservoir 124 so as to extend toward the discharge passage 124a, and a key for rotating the screw 126 is a driving motor 127. It consists of The water generation means rotates the screw 126 with the driving motor 127, and causes the screw 126 to be rotated to cause the water to flow toward the discharge passage 124a, thereby discharging the floating impurities floating on the water surface through the discharge passage 124a. It is forcibly pushed toward), thus allowing suspended impurities to be discharged to the outside. Here, in the drawings of the present invention, but only one screw 126 for causing water current is installed, of course, it can be installed in plurality depending on the size of the separation tank (122).

In addition, the secondary separate collection device 120 is provided with a water spray means for injecting water to the floating impurity floating on the water to move to the discharge passage (124a). The water spraying means includes a fluid pump 128 for pumping water and a water spray nozzle 129 for directly injecting high pressure water discharged from the fluid pump 128 onto the floating impurity W on the water surface. In particular, the water spray nozzle 129 is configured to be provided in plurality on the water surface in the width direction as shown in FIG. Here, each nozzle 129 is of course configured to be connected by a connecting pipe (129a).

The water spraying means facilitates the discharge of the floating impurities W by forcibly moving the floating impurities on the water surface to the discharge passage 124a through the fluid pump 128 and the water spray nozzle 129. In addition, the water injection means serves to separate the floating impurities from the third conveying conveyor (64) by moving the water directly to the floating impurities on the water surface. In particular, this feature serves to fundamentally prevent the suspended impurities separated from the waste from being loaded on the third conveying conveyor 64 and remixed with the waste concrete mass.

By separating the secondary impurities from the waste through the separation tank 122, the secondary separation collection device 120 of such a configuration, and then quickly discharged the separated impurities through the water generation means and water spray means to the outside, It completely removes and separates impurities contained in waste. In particular, the water generating means and the water spraying means forcibly move and discharge the suspended impurities separated from the waste, thereby preventing them from being mixed with the waste concrete mass again.

Next, a method for separating the suspended impurities by the separation collection unit having such a configuration will be described in detail with reference to FIGS. 1 to 5. 5 is a block diagram showing the configuration of a method for separating and collecting suspended impurities in accordance with the present invention. First, the waste is transferred to a predetermined height using the transfer conveyor 100, and the transferred waste is dropped downward (S101). At this time, the waste conveyed to the conveying conveyor 100 is of course roughly crushed by the primary crushing unit 20, as shown in FIG.

And blows a strong wind using the blower 112 to the waste falling to the bottom (S103). At this time, the wind blown into the waste is suspended impurities contained in the waste, that is, waste paper, waste vinyl, waste plastic. Waste styrofoam is blown away from the waste and separated. In particular, the wind of the blower 112 blows off relatively heavy floating impurities, such as waste paper, waste vinyl, waste plastic, and the like. Of course, the suspended impurities separated from the waste are discharged to the separation tank 122 through the air blowing duct 114.

Meanwhile, the waste dropped to the lower portion is introduced into the reservoir 124 of the separation tank 122 through the vibration strainer 52 as shown in FIGS. 2 and 5, and the introduced waste begins to be submerged in water. (S105). At this time, the suspended impurities in the submerged waste, ie, wood chips, waste styrofoam, waste paper, etc., rise above the water surface and start to separate from the waste. In this state, the suspended impurities contained in the waste are completely removed from the waste, in particular the waste concrete mass. It is separated and only extractable pure waste concrete mass is extractable. Of course, the extracted waste concrete mass is transferred from the separation tank 122 along the third transfer conveyor (64).

On the other hand, the floating impurities floated on the surface of the water, along with the water (S107) generated by the screw 126 and the driving motor 127 are collected together while moving toward one direction of the reservoir 124, that is, the discharge passage (124a). You lose. In addition, the floating impurities moving along the water stream are collected while moving toward the discharge passage 124a by the high pressure water injected from the water spray nozzle 129 (S109). At this time, water is continuously supplied to the water storage chamber 124 of the separation tank 122 by the water supply pump 125 (S111), and the floating impurity is continuously discharged through the discharge passage 124a together with the water. It is discharged to the outside. Meanwhile, the floating impurities collected toward the discharge passage 124a by the high pressure water and the water stream move in the opposite direction to the third transfer screw 64 as shown in FIG. 3, and thus the third transfer screw 64. ) Will not mix with the waste again.

As described above, the method for separating and removing the floating impurities of the present invention, after dropping the waste at a predetermined height, blows a strong wind on the falling waste, and first separates and removes the suspended solids contained in the waste. By separating and removing the remaining suspended impurities contained in the waste secondary, only the waste concrete mass can be extracted. In particular, the suspended impurities separate collection method is to extract and discharge only the waste concrete mass to produce a good recycled aggregate.

Although the preferred embodiments of the present invention have been described above by way of example, the scope of the present invention is not limited to these specific embodiments, and may be appropriately changed within the scope of the claims.

As described above, the method for separating and removing the floating impurities of the building waste according to the present invention first drops and removes the suspended solids contained in the waste by blowing a strong wind to the falling waste after dropping the waste at a predetermined height. Then, by submerging this to separate and remove the remaining suspended impurities contained in the waste secondary, it is possible to extract only the waste concrete mass, thereby having the effect of producing a good recycled aggregate.

Claims (3)

In the method of separating and collecting the floating impurities of the construction waste for separating the floating impurities contained in the construction waste, Dropping construction waste downward; Blowing wind to the falling building waste so as to blow off and separate the floating impurities contained in the building waste; Immersing the dropped construction waste in water so as to float the floating impurity contained in the construction waste onto the surface of the building to separate it; A method for separating and collecting floating impurities of construction wastes, comprising the step of causing water current to be collected by moving the floating impurities floating on the water to one side. The method of claim 1, further comprising directly injecting water into the suspended impurities so as to further boost the suspended impurities moving along the water stream. The method of claim 1 or 2, further comprising the step of continuously supplying water so that the collected suspended impurities flow with the water and be discharged.