KR100764136B1 - A classifier for crushed recycle-aggregate from construction waste - Google Patents

Abstract

A device of high temperature and high pressure steam jetting type for removing fine particle of recycled aggregates by using waste heat of an incinerator is provided to prevent drain holes of a bucket from being stopped up by the heat and pressure of steam although foreign materials are piled up in the drain holes of the buckets in feeding the recycled aggregates to a dewatering screen. A device of high temperature and high pressure steam jetting type for removing fine particle of recycled aggregates by using waste heat of an incinerator is composed of: a water tank(100) receiving the recycled aggregate and the cleaning water; a screw(200) installed at the water tank to rotate in situ and transfer the recycled aggregate poured into the water tank, to one side; a drum-shaped discharge bucket mounted on one side of the screw to rotate in situ, and scoop up and discharge the recycled aggregate transferred by the screw to a dewatering screen; a blocking plate(400) installed between the screw and the drum-shaped discharge bucket to prevent foreign materials floating in the cleaning water stored in the water tank from moving toward the discharge bucket; and a steam jetting unit(500) mounted on the upper part of the discharge bucket opposed to the dewatering screen, to prevent drain holes of the bucket from being stopped up by jetting the steam to the bucket.

Description

A CLASSIFIER FOR CRUSHED RECYCLE-AGGREGATE FROM CONSTRUCTION WASTE}

1 is an exploded perspective view of an apparatus for removing circulating aggregate fine powder using a high temperature and high pressure steam injection method using waste heat from an incinerator according to the present invention;

Figure 2 is a front view of the circulating aggregate fine powder removing device of the high temperature and high pressure steam spraying method using the waste heat incinerator according to the present invention according to the present invention.

Figure 3 is a plan view of the circulating aggregate fine powder removing device of the high temperature and high pressure steam injection method using the waste heat incinerator according to the present invention.

Figure 4 is a side view of the installation state of the circulating aggregate fine powder removing device of the high temperature and high pressure steam injection method using the waste heat incinerator according to the present invention.

Figure 5 is a plan view of the installation state of the circulating aggregate fine powder removing device of the high temperature and high pressure steam injection method using the waste heat incinerator according to the present invention.

Figure 6 and Figure 7 is an illustration of a drum-type discharge bucket applied to the apparatus for removing circulating aggregate fine powder of high temperature and high pressure steam spraying method using waste heat of incinerator according to the present invention, respectively.

<Description of Signs for Main Parts of Drawings>

1: sorting screen, 2: dewatering screen

100: tank, 110: transfer path

111: curve portion, 112: free fall portion

120: collecting part, 200: screw

300: drum type discharge bucket, 321: cut off

400: blocking plate, 500: steam injection means

The present invention relates to an apparatus for removing circulating aggregate fine powder of a high temperature and high pressure steam spraying method using waste heat from an incinerator. It is possible to keep the drain hole of the bucket which circulates the circulating aggregate smoothly in an open state, and removes the circulating aggregate fine powder of the high temperature and high pressure steam spray method using waste heat of the incinerator which can improve the quality of the circulating aggregate by preventing foreign substances from moving to the bucket side. Relates to a device.

According to the so-called development priority policy and high-growth policy promotion, it has been a reality that the adverse environmental problem in Korea has been somewhat out of consideration.

However, as a result of this growth-oriented policy, the growth of various wastes and pollutants in the by-products has reached an urgent point which can no longer be delayed.

In particular, the construction industry wastes of various construction and civil works show a sharp increase, mainly due to the redevelopment, activation of reconstruction, and dismantling of structures, which are actively progressed due to deterioration and deterioration of urban and local buildings. do.

In general, construction waste refers to soil, sand, gravel, earth or soil mixed with trash and waste materials, concrete lumps, waste wood, asphalt concrete lumps, and construction sludge. One of the main characteristics is that most of the construction wastes are composed of inorganic materials, which are harmless to the human body. It is said to provide the cause of indifference between the government and industry regarding waste disposal.

Such indifference entailed a waste of valuable resources and caused deterioration of the quality of the recycled aggregate, which was being made, and most of the utilization of the recycled aggregate was used as soil substitute, soil cover, and landfill. Therefore, by realizing the recycling through the management of such wastes, it is necessary to actively minimize the environmental pollution, replace the scarce resources, and reduce the cost of the construction industry base.

To this end, the Law on the Promotion of Saving and Recycling of Resources has recently been enacted in Korea, and the recycling of construction waste has become mandatory, and various production facilities for recycling have been produced and applied to various industrial sites.

As described above, in accordance with the mandatory recycling of construction wastes, various devices have been proposed to handle the partial or partial disposal of waste from waste treatment to regeneration.

As a technique for producing recycled aggregates from construction wastes according to the prior art, it is common to screen wave / grinding of construction wastes and various foreign matters (waste, waste vinyl, waste clothing, waste paper, etc.).

However, in the case of the recycled aggregate produced by the apparatus and method for producing recycled aggregates according to the prior art, cement mortar is not completely removed from the surface, and also impurities such as pieces of wood, soil, and styrofoam are included. In many cases, since the concrete strength is lowered when used for manufacturing mixed concrete, the recycled aggregate recycled as described above is used for simple landfill or subsidiary soil subsidiary layers.

In addition, technologies are being developed to produce reclaimed sand with small particles in various ways, and the reclaimed sand is supplied to a separator having a rotating shaft with a screw attached to its surface in a tank to circulate aggregate, sludge and wood. It is possible to separate and discharge foreign substances such as pieces and styrofoam pieces.

In the separator according to the prior art, a rotating body having a screw and a bucket formed in one shaft is mounted inside the tank, and the circulation aggregate introduced into the tank by the screw is moved to the drum side when the rotating body rotates, By circulating the aggregate aggregated in the lower drum by the rotation is to supply to the dehydration screen.

However, the separator according to the prior art has the following problems.

When the recycled aggregate is pumped by the bucket, some recycled aggregate or foreign matter blocks the drain hole formed in the bucket. In this case, there is a problem in that the operation rate of the dewatering screen must be increased in order to lower the water content of the circulating aggregate as the water is supplied to the dewatering screen together with the circulating aggregate because the drainage is not made through the drain hole by the foreign matter caught in the drain hole. The drain hole is not blocked only by foreign matters, but in the case of a low temperature winter season, the washing water is frozen in the bucket, and thus, the drainage is not made through the drain hole as described above.

In addition, the circulation aggregate and the foreign matter is introduced into the tank together, the circulating aggregate is precipitated at the bottom of the tank by the specific gravity, and the foreign matter is floated, and the foreign matter moves to the bucket side and the dehydration screen together with the circulation aggregate by the bucket. As it is supplied, an unnecessary process for selecting foreign matters is further required, otherwise there is a problem in that the quality of the recycled aggregates is reduced because the recycled aggregates are used in a mixed state of the foreign substances.

In addition, the circulating aggregate introduced into the water tank may be transferred by the screw only when it is settled at the bottom of the water tank. However, since the flow rate of the conventional separator flows into the water tank, the size of the water tank is increased to settle the circulating aggregate. There is also a problem that requires a huge initial investment in equipment.

In addition, since the water tank is provided on the outside, the washing water for sorting and washing the circulating aggregate filled in the washing water tank may be sensitively changed depending on the ambient temperature. Therefore, in the winter, the washing water filled in the tank is frozen, so that the tank cannot be used. In order to solve this drawback, techniques for heating the washing water contained in the tank so as not to freeze have been proposed. However, this simply means that the washing water can be heated to warm water, so that the tank can be used even in winter. There is a limit to screening aggregates.

The present invention is to solve the above-mentioned conventional problems, receiving the recycled aggregate passed through the crushing and sorting process with water, and washed with the water and sorting the foreign matter by the specific gravity difference, the bottom of the tank through the bucket Circulating aggregate fine powder of high temperature and high pressure steam spraying method using waste heat of incinerator which prevents the bucket from clogging by foreign matter and freezing when supplying the circulating aggregate deposited in The purpose is to provide a removal device.

In addition, another object of the present invention is to supply only pure recycled aggregates so that foreign substances introduced into the tank does not proceed to the subsequent process.

Another object of the present invention is to allow the recycled aggregates to settle rapidly at the inside of the tank.

Still another object of the present invention is to prevent the washing water from freezing even in winter, and to increase the specific gravity sorting efficiency by helping to float the suspended solids by applying high temperature and high pressure to the circulating aggregate introduced into the washing water.

The apparatus for removing circulating aggregate fine powder using high temperature and high pressure steam spraying method using waste heat from an incinerator according to the present invention for achieving the above object comprises: a water tank in which circulating aggregate and water are introduced together through a crushing and sorting process; A screw which is rotatably mounted in the tank to transfer the circulation aggregate introduced into the tank; A bucket for transferring the circulating aggregate conveyed by the screw to a subsequent process; It is characterized in that it comprises a steam injection means for injecting steam of high temperature and high pressure to the bucket to maintain the drain hole of the bucket by the heat and pressure.

The features and advantages of the present invention will become more apparent from the following detailed description based on the accompanying drawings. Prior to this, the terms or words used in the present specification and claims are defined in the technical spirit of the present invention on the basis of the principle that the inventor can appropriately define the concept of the term in order to explain his invention in the best way. It must be interpreted to mean meanings and concepts.

As shown in FIG. 5, the circulating aggregate fine powder removing device of the high temperature and high pressure steam spraying method using waste heat of the incinerator according to the present invention is wet-selected and washed with crushed circulating aggregate (referred to as fine aggregate (sand) in the present invention). By doing so, the water tank 100 receiving the crushed circulating aggregate and the washing water is installed in the water tank 100 and flows into the water tank 100 and sinks to the bottom of the water tank 100 by specific gravity. A drum-type discharge bucket 300 for supplying only the recycled screw 200 and the recycled aggregate transported by the screw 200 to only the recycled aggregate from which the washing water is removed to the dewatering screen 2, and a drum-type discharge bucket ( It comprises a steam injection means 500 for spraying steam to 300 so that the drain hole of the drum-type discharge bucket is not blocked, it will be described in detail each component.

The present invention is used in the final process for producing the final aggregate recycled aggregate, the water tank 100 is supplied with the recycled aggregate and water (washing water) of a predetermined particle size selected through the screening screen (1). That is, in the screening screen 1, the circulating aggregates are washed and the foreign matter is sorted by the washing water, and the water tank 100 receives the circulating aggregates.

1 and 2, the water tank 100 has a tubular structure with an open top, and the portions corresponding to the screw 200 and the drum type discharge bucket 300 have different heights, that is, the drum type discharge bucket 300 side. The collecting part 120 lower than the screw 200 side may be formed. This is to increase the efficiency of the drum-type discharge bucket 300 by collecting the circulation aggregate in the collecting unit (120). The water tank 100 of such a structure is connected through the sorting screen 1 and the transfer path 110 (shown in FIG. 4) to receive the circulation aggregate and the washing water, and to settle the washing water through the discharge path (not shown). Discharge to (not shown). The transfer path 110 is connected to one side of the water tank 100, that is, the opposite side of the drum type discharge bucket 300, to secure a space in which the circulation aggregate introduced into the water tank 100 may sink. In other words, by utilizing the entire area of the water tank 100 as a space where the circulation aggregate sinks, the water tank 100 will not have to be excessively large.

As shown in FIG. 4, and the transfer path 110 may have a curved portion 111 or / and a drop portion 112 so as to accelerate the settling speed of the circulating aggregate. When the recycled aggregate is transported along a linear transfer path, the flow velocity is increased, so the sedimentation rate in the water tank 100 is inevitably low, so that some recycled aggregates may not be precipitated and there are many angled parts on the surface of the recycled aggregates due to crushing. Since the angular portion may not be spherically shaped during transportation, the productivity of the circulating aggregates may be reduced and the quality of the circulating aggregates may be degraded. The impingement speed is increased and the angular portion is eliminated by the collision, and the flow rate is slowed down when the circulating aggregate falls by the dropping portion 112 and the angular portion is removed to change the shape of the sphere.

As shown in FIGS. 1 to 3, the screw 200 is rotatably installed in the water tank 100 and rotates through the driving means, while the circulation aggregate introduced into the water tank 100 is at one side (drum type). To the discharge bucket 300 side), for example, the first rotary shaft 210, the peripheral portion of the first rotary shaft 210 which is arranged in the longitudinal direction inside the water tank 100 and rotates through the driving means In the axial direction of the first rotary shaft 210 to each other at a predetermined distance from each other radially formed spokes 220, the transfer lead is connected to the end of the spokes 220 around the first rotary shaft 210 ( 230). That is, the transfer lead 230 is wound in a spiral while being supported by the spokes 220 to rotate with the first rotary shaft 210 to transfer the circulation aggregate settled in the water tank 100 to the other side. In this case, the transfer leads 230 may have the same or different pitches.

As shown in FIG. 2, the driving means is connected to the driving motor 240, the driving motor 240, and the first rotation shaft 210 so as to transmit power to the first rotation shaft 210. It may be composed of a sprocket 241.

As shown in Figure 1 and 2, the drum type discharge bucket 300 and the second rotary shaft 310; A rim 322 is formed on the circumference of the second rotary shaft 310 to have a larger diameter than the second rotary shaft 310 and is formed along the axial direction of the second rotary shaft 310. The first and second side plates 320 and 330 formed at regular intervals and the first and second side plates 320 and 330 are formed at regular intervals along the circumferential direction, respectively, and have a plurality of drain holes 341. Consisting of a plurality of buckets 340. Bucket 340 may be in the form of a box that is open on one side so as to supply the dewatering screen (2) to circulate aggregates settled on the bottom of the tank 100 during the rotation of the drum-type discharge bucket 300, It is to have a plurality of drain holes (341) for dehydration.

The drum-type discharge bucket 300 of such a configuration may rotate together with the screw 200, and thus, the first and second rotation shafts 210 and 310 may have the same axis or different shafts connected to each other.

Recirculating aggregate and various foreign substances (waste vinyl, waste wood, waste clothing, etc.) are introduced into the water tank 100 so that foreign substances having a small specific gravity will float in the wash water, and these foreign substances are dehydrated by the drum-type discharge bucket 300. The blocking part 321 is formed in the 1st side plate 320 of the screw 200 side so that it may not be supplied to (2). As shown in FIG. 6, the blocking part 321 may be partially formed on the first side plate 320 or may be formed as a whole as shown in FIG. 7.

In addition, a blocking plate 400 (shown in FIG. 1) is provided inside the water tank 100 to block the screw 200 and the drum-type discharge bucket 300 for the same purpose as the blocking unit 321.

The blocking plate 400 is disposed in the transverse direction in the water tank 100 along the width direction, and both ends thereof are connected to the water tank 100 and fixed to each other. It is made of a higher size to prevent foreign matter suspended in the wash water to move to the drum type discharge bucket (300) side.

1 and 2, the steam spraying means 500 sprays steam of high temperature and high pressure to the bucket 340 to prevent the drain hole 341 of the bucket 340 from being blocked by heat and pressure, and also to the bucket 340. The circulating aggregate contained therein does not remain and falls to the dehydration screen (2). For example, a pump 510 pumping steam generated in an incinerator (not shown), and a steam pumped by the pump 510. It may be composed of a nozzle 520 that sprays to 330.

In the present invention, the foreign matter floating guide means 600 may be further provided as shown in FIG. 8 so that foreign matters may float together with the circulation aggregate. The foreign matter floatation guide means 600 is to inject steam of high temperature and high pressure through the waste heat of the incinerator, similar to the steam injection means 500, for example, the steam guide pipe 610 and the steam guide pipe 610 to receive steam from the incinerator It may be formed in the injection hole 620 for injecting steam, the installation position is not limited to that shown in the drawings can be installed anywhere that can achieve the purpose.

The operation of the circulating aggregate fine powder removing device of the high temperature and high pressure steam injection method using the waste heat of the incinerator according to the present invention configured as described above is as follows.

The circulation aggregate sorted by the sorting screen 1 is introduced into the water tank 100 along the transfer path 110 together with the water (washing water). At this time, as the flow rate of the circulating aggregate decreases while passing through the curved portion 111 and the dropping portion 112, the settling velocity of the circulating aggregate is increased, and the circulating aggregate is mixed and collides with the conveying path 110 to cause a physical collision. The angled part is removed by this.

The circulating aggregates introduced into the water tank 100 and the circulating aggregates of the washing water gradually sink to the bottom of the water tank 100 by specific gravity, and the washing water is discharged into the sedimentation tank. The screw 200 and the drum-type discharge bucket 300 are rotated at a low speed while the circulating aggregate is introduced into the water tank 100. When the screw 200 is rotated, the circulation aggregate that sinks to the bottom of the water tank 100 by the transfer lead 230 is moved to the collection part 120 on the drum-type discharge bucket 300 side to collect.

When the drum-type discharge bucket 300 rotates with the screw 200, the individual buckets 340 pass through the collecting unit 120, respectively, and collect the collecting unit 120 in a state of containing the aggregate aggregate collected in the collecting unit 120. The washing water contained in the individual bucket 340 is drained through the drain hole 341 of the individual bucket 340 while the drum type discharge bucket 300 is rotating.

If the openings of the individual buckets 340 are directed toward the lower dewatering screen 2 while the drum-type discharge bucket 300 is rotating, the circulating aggregate contained in the bucket 340 falls to the lower dewatering screen 2 by gravity. do. The individual bucket 340 in which the circulating aggregate falls to the dewatering screen 2 again rotates toward the collecting unit 120 to circulate the circulating aggregate collected in the collecting unit 120. That is, the individual bucket 340 can be continuously rotated to remove the circulation aggregate.

On the other hand, not only the circulating aggregate and washing water are introduced into the water tank 100, but various foreign matters (wastewood, waste vinyl, waste clothing, waste paper, etc.) are introduced together, and the foreign matter is crushed through a process such as crushing, so the specific gravity is small. When introduced into the water tank 100 is suspended in the washing water in the water tank (100). As such, the foreign matter floating in the washing water is moved to the drum-type discharge bucket 300 together with the washing water by the screw 200, and into the drum-type discharge bucket 300 by the blocking plate 400 and the blocking part 321. It does not flow, and as a result, only the circulating aggregate without foreign matter is supplied to the dewatering screen (2).

On the other hand, the high temperature and high pressure of the steam is injected by the foreign matter floating guide means 600 in the water tank 100, therefore, the foreign matter on the circulation aggregate among the circulation aggregate and foreign matter introduced into the water tank 100 by the heat of steam It is deteriorated and removed, and floats to the surface by pressure, so that only pure circulating aggregates sink.

High temperature and high pressure steam is injected from the nozzle 520 of the steam spraying means 500 while the individual buckets 340 of the drum type discharge bucket 300 pass through the upper portion of the dewatering screen 2.

When the drum type discharge bucket 300 rotates to remove and remove the recycled aggregate collected in the collecting unit 120, some recycled aggregate and foreign matter may be caught in the drain hole 341 of the individual buckets 340, and the recycled aggregate. Some of the drainage holes 341 may be blocked by the viscosity and some foreign matters. Thus, the circulation aggregate and the foreign matters blocking the drainage holes 341 may be caused by the high temperature and high pressure of steam, that is, by heat drying and physical impact. Is removed. Therefore, the individual bucket 340 passing through the upper portion of the dehydration screen 2 maintains the drainage hole 341 in an open state, so when the rotating aggregate is collected and collected in the collecting part 120 in the next process, smooth drainage is achieved. I can keep it.

On the other hand, when the winter air temperature is low, when the drain hole 341 of the individual bucket 340 is blocked by freezing (the washing water stored in the water tank 100 may not be frozen, but the washing water may freeze in the drain hole 341 of the individual bucket 340). ) The ice frozen in the drain hole 341 is melted by the high temperature and high pressure steam, so that the drain hole 341 may be kept open at all times regardless of the temperature.

As described above, according to the present invention, according to the present invention, according to the present invention, the apparatus for removing circulating aggregate fine powder using high-temperature, high-pressure steam spray method using waste heat is used to pump out the circulating aggregate settled in the water tank using a bucket to supply the dehydration screen, which is a post process Even if foreign matters accumulate in the drain holes of the buckets, the drain holes of the buckets are not blocked by the heat and pressure of the steam.In addition, even if the bucket is frozen due to the low temperature, the clogging of the drain holes is eliminated. The efficiency can be improved.

In addition, various foreign matters suspended in the wash water in the tank by the blocking unit cannot move to the drum-type discharge bucket side, so only the pure recycled aggregates free of foreign substances are moved to the drum-type discharge bucket, thereby increasing the purity of the recycled aggregate. Can produce aggregates.

In addition, since the circulating aggregate is introduced into the tank with the washing water, the circulating aggregate collides with the curved portion and the drop portion to remove the angular portion and is changed into a spherical shape, thereby producing high-grade circulating aggregate, and through the curved portion and the drop portion, As the flow rate is reduced, the settling speed of the circulating aggregates is increased, so that the settling of the circulating aggregates can be induced without excessively increasing the size of the tank, thereby reducing the initial capital investment cost.

In addition, by spraying steam in the direction of the foreign matter floating in the washing water to help the foreign matter floating can increase the sorting efficiency of the foreign matter.

While the invention has been described and illustrated in connection with preferred embodiments for illustrating the principles of the invention, the invention is not limited to the configuration and operation as such is shown and described. Rather, it will be apparent to those skilled in the art that many changes and modifications to the present invention are possible without departing from the spirit and scope of the appended claims. Accordingly, all such suitable changes and modifications and equivalents should be considered to be within the scope of the present invention.

Claims (5)

Receiving the circulation aggregate and the washing water and the tank having a lower collecting portion on one side than the other section; A screw formed of a first rotating shaft and a blade formed at a circumference of the rotating shaft and installed in the tank so as to rotate in place through the first rotating shaft to transfer the circulation aggregate introduced into the tank to the collecting portion of the tank; A pair of side plates, which are erected at regular intervals from each other, is formed open toward a center at regular intervals therebetween in a circumferential direction between the side plates, respectively, and is rotatably mounted in place at the collecting unit and is collected by the screw. A drum-type discharge bucket having a plurality of buckets for discharging the circulating aggregate collected in the unit to the outside; Circulation of the high temperature and high pressure steam spray method using waste heat from an incinerator made of a waste plate installed between the screw and the drum-type discharge bucket to block foreign substances floating in the wash water stored in the tank from flowing to the drum-type discharge bucket. In the aggregate fine powder removal apparatus, A pump for pumping steam generated from an incinerator, and a nozzle installed at an upper portion of the drum-type discharge bucket facing the dewatering screen and receiving steam from the pump to spray the bucket toward the bucket by the heat and pressure of the steam. High-temperature, high-pressure steam injection method of circulating aggregate fine powder using waste heat of the incinerator, characterized in that it comprises a steam injection means for blocking the drain hole of the bucket. 2. The high temperature and high pressure steam spray using incinerator waste heat according to claim 1, further comprising a blocking part formed on the side plate of the drum type discharge bucket to prevent the floating material flowing by the screw from flowing into the drum type discharge bucket side. Recycling aggregate fine powder removal device of the method. The high temperature and high pressure steam using incinerator waste heat according to claim 1 or 2, wherein the transfer path for supplying the circulating aggregate to the tank has a curved portion to guide the circulating aggregate to be introduced together with the washing water. Circulating aggregate fine particle removal device of the spray method. [4] The apparatus for removing circulating aggregate fine powder of high temperature and high pressure steam spraying method using waste heat from an incinerator, characterized in that a drop path for grinding is formed. [5] The foreign material of claim 4, further comprising a steam guide pipe that is piped inside the tank and receives steam from the incinerator, and a plurality of injection holes that inject steam supplied to the steam guide tube at high temperature and high pressure. The apparatus for removing circulating aggregate fine powder using a high temperature and high pressure steam spray method using waste heat from an incinerator, characterized in that it further comprises a foreign matter floating guide means for inducing the floating.

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