KR-102964580-B1 - SIZE SORTING DEVICE FOR MIXED WASTE TREATMENT

KR102964580B1KR 102964580 B1KR102964580 B1KR 102964580B1KR-102964580-B1

Abstract

The present invention relates to a size sorting device for processing mixed waste, and more specifically, to a size sorting device for processing mixed waste that effectively sorts mixed waste according to particle size using a trommel module having a plurality of sorting holes, and improves the size sorting efficiency of mixed waste by making the diameter of the sorting holes adjustable. To this end, the present invention is characterized by comprising: a hopper into which mixed waste is fed; an input conveyor installed at the bottom of the hopper to move the mixed waste discharged from the hopper at a constant speed; a trommel module disposed at the end of the input conveyor to receive the mixed waste and having sorting holes formed therein for sorting the received mixed waste by size; an air injection module installed in the trommel module to discharge air at a predetermined pressure to prevent the mixed waste from adhering to the inner wall of the trommel module; a sorting hole adjustment module for adjusting the diameter of the sorting holes of the trommel module; and a cushioning means disposed between the trommel module and the sorting hole adjustment module to mitigate vibrations and shocks transmitted from above.

Inventors

김동국

Assignees

해솔산업(주)

Dates

Publication Date: 20260513
Application Date: 20251126

Claims (3)

A hopper (10) into which mixed waste is fed; An input conveyor (20) installed at the bottom of the hopper (10) to move the mixed waste discharged from the hopper (10) at a constant speed; It includes a trommel module (30) positioned at the end of the input conveyor (20) to receive mixed waste and having a sorting hole (311) formed therein for sorting the received mixed waste by size; The above trommel module (30) is, A sorting rotating body (31) having multiple sorting holes (311) spaced apart from each other, formed in the shape of a hollow tubular body with both ends in the longitudinal direction open and formed in the shape of a hollow tubular body for discharging mixed waste, and A collection unit (32) for collecting mixed waste discharged through the sorting unit (311), and It includes a rotation drive unit (33) that rotates the above-mentioned sorting rotor (31) at a predetermined speed, and In the above sorting rotating body (31), A spiral screw (312) is further provided to stir the mixed waste moving along the inner surface in a spiral manner, An air injection module (40) installed in the above trommel module (30) to discharge air at a predetermined pressure to prevent mixed waste from adhering to the inner wall of the above trommel module (30); A sorting hole control module (50) for controlling the diameter of the sorting hole (311) of the above trommel module (30); and A cushioning means (60) is further provided to be disposed between the trommel module (30) and the sorting hole control module (50) to mitigate vibrations and shocks transmitted from above; The above sorting hole control module (50) is, A curved plate (51) provided on the outer side of the above trommel module (30) so as to be movable along the longitudinal direction, and A control drive unit (52) that moves the above curved plate (51) along the length direction of the above trommel module (30), and The control means (53) controls the operation of the control drive unit (52) by checking one or all of the rotational speed of the trommel module (30), the amount of mixed waste flowing into the trommel module (30), or the amount of mixed waste discharged through the sorting hole (311). The above buffering means (60) is, A buffer housing (61) formed in the shape of a hollow housing with an open top, and A lifting body (62) that is installed to be accessible in the above buffer housing (61) and has a support plate (622) at its top that contacts the outer surface of the above trommel module (30), and It includes an elastic body (63) disposed inside the buffer housing (61) and elastically supporting the lifting body (62), and The helical screw (312) is further provided with a stirring plate (313) for changing the movement path of the mixed waste being stirred, wherein the stirring plate (313) is formed in the shape of a flat plate having a predetermined length, and one end in the longitudinal direction is positioned to be in contact with the helical screw (312), and is positioned at an angle toward the center of the sorting rotating body (31). The above curved plate (51) is characterized by being able to adjust the diameter of a discharge hole (511) connected to a row, a certain area, or the entire sorting hole (311) in a single movement, in a size sorting device for mixed waste treatment.
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In claim 1, the elastic body (63) is, It is placed inside the buffer housing (61), and A pair of upper joining surfaces (631) are formed symmetrically on the top, and A pair of vertical elastic surfaces (632) that are formed extending downward from the above pair of upper connecting surfaces (631) and each protruding convexly toward the lifting body (62), and A horizontal elastic surface (633) that connects the above pair of vertical elastic surfaces (632) and contacts and supports the bottom surface of the lifting body (62), and A size sorting device for mixed waste treatment, characterized by including a corner elastic surface (634) provided at the connection point of the pair of vertical elastic surfaces (632) and horizontal elastic surfaces (633) to simultaneously support the bottom surface and the side surface of the buffer housing (61).

Description

Size sorting device for mixed waste treatment The present invention relates to a size sorting device for processing mixed waste, and more specifically, to a size sorting device for processing mixed waste that effectively sorts mixed waste according to particle size using a trommel module having a plurality of sorting holes, and improves the size sorting efficiency of mixed waste by making the diameter of the sorting holes adjustable. Synthetic resins are widely used in daily life and industrial fields, and their usage is increasing rapidly every year with industrial development; these synthetic resins include polyethylene, polycarbonate, polyurethane, polyester, and polypropylene. Used synthetic resins, that is, waste synthetic resins, were landfilled or incinerated, but with the implementation of the Framework Act on Resource Circulation in January 2018, waste disposal fees are being imposed. Previously, recycling methods were proposed to reduce the cost burden of processing waste synthetic resins. For example, one method involved recycling waste synthetic resins into Solid Refuse Fuel (SRF). However, as such recycling methods for solid refuse fuel are gradually decreasing due to changes in renewable energy policies, there is a demand for a method to recycle waste synthetic resins into molded products through a molding process. To recycle waste synthetic resins, they must be sorted according to material or size, as they are mixed in various materials and sizes. Among these, the size sorting device is generally structured such that mixed waste is fed through a hopper and transferred to a trommel module via an input conveyor; the trommel module moves the waste through rotational motion and separates waste with smaller particle sizes through sorting pores formed on its outer surface. For example, in Korean registered patent No. 10-2411992 (registered June 17, 2022), it was proposed to feed mixed waste into a trommel module and then sort the mixed waste by size through sorting pores formed with different diameters in multiple trommel modules. The aforementioned prior art is configured to adjust the diameter of a screening pore formed in a trommel module by individually rotating a plurality of control blades through a fixing pin; however, since the screening pore is formed along the curvature of the outer surface of the trommel, it is inherently a curved pore. Nevertheless, the control blade is made in the form of a flat plate, and the method of rotating this plate by radially arranging it on the outer side of the pore has a problem in that it is difficult to uniformly control the shape of the pore with curvature. In other words, because the screening pore has a curved geometry, it is actually difficult to control the entire diameter of the screening pore by rotating the plate to open or close it. Furthermore, the aforementioned prior art is configured such that a fixing pin flange, fixing pin, fixing pin housing, magnetic body, and magnetic coil are installed separately for each of the multiple screening holes spaced apart from one another. Considering that tens to hundreds of screening holes are formed around the entire circumference of the trommel, this results in an excessive increase in the number of parts in the entire system, causing problems that make manufacturing, assembly, and maintenance very difficult. Furthermore, since waste treatment environments are characterized by high levels of contamination, impact, moisture, and foreign substances, a structure in which mechanical pins and rotating control blades exist in each screening pore can frequently experience clogging, sticking, and breakage of fixing pins, leading to increased maintenance time and costs. Furthermore, in environments where tens to hundreds of screening pores are formed, the method of individually controlling the control blades for each pore results in uneven screening distribution, complex control algorithms, and poor real-time responsiveness. In particular, conventional technology does not automate the control of screening pore diameters, and since the control blades have a structure that simply rotates around a fixed pin, real-time adjustment of screening pores—that is, responding to fluctuations in the amount of waste inflow—is virtually impossible. In addition, the above-mentioned conventional technology requires maintaining a gap of 0.5 to 1 cm between the fixed pin housing and the outer surface of the trommel, which implies the possibility of contaminants accumulating in the periphery of the screening pore or colliding with foreign matter during the rotation of the control blade, resulting in a problem of reduced durability and adjustment accuracy of the device. Furthermore, the control blade method makes it difficult to precisely control the opening area of the screening pores. In particular, for screening pores with curved surfaces, it is difficult to determine a reference position to uniformly adjust the total area of the s