WO2014117587A1

WO2014117587A1 - Rotational-flow sorting and cleaning apparatus and method for waste plastic pieces

Info

Publication number: WO2014117587A1
Application number: PCT/CN2013/088124
Authority: WO
Inventors: 冯愚斌
Original assignee: Feng Yubin
Priority date: 2013-01-31
Filing date: 2013-11-29
Publication date: 2014-08-07
Also published as: CN103085195B; CN103085195A

Abstract

The present invention relates to a rotational-flow sorting and cleaning apparatus for waste plastic pieces. The apparatus comprises a tapered tank, a water inlet pipe, a silt separating net, a top feeding hole, a top discharging pipe, and a sidewall discharging pipe. The tapered tank is inverted taper-shaped on the whole, and a silt discharging hole is disposed on the bottom of the tapered tank. The slit separating net only used for silt and impurities to pass through is located in the tapered tank, and the silt separating net is wide on the upper part and narrow on the lower part. The water inlet pipe is connected to the sidewall of the tapered tank along a tangent direction and extends inside the silt separating net. The top feeding hole is located on the top of the tapered tank. The top discharging pipe is located on the top of the tapered tank. The sidewall discharging pipe is connected to the sidewall of the tapered tank along the tangent direction of the tapered tank and extends into the silt separating net. The present invention further relates to a rotational-flow sorting and cleaning method for waste plastic pieces. The present invention has the advantages: the structure is simple; the processing efficiency is effectively improved; the separation process is automatic and continuous; and the sorting and cleaning of the waste plastic pieces can be synchronously implemented. The apparatus and method relate to recycling and cleaning technologies of the waste plastics.

Description

Swirl sorting cleaning device and method for waste plastic chips

The present invention relates to recycling and cleaning techniques for waste plastics and, in particular, to a cyclone sorting and cleaning apparatus and method for waste plastic chips. Background technique

As the consumption of plastic products continues to increase, waste plastics continue to increase. If these waste plastics are not handled properly, they will inevitably damage the environment, destroy the ecological balance, and ultimately threaten the survival of mankind.

The existing waste plastics are mainly treated as follows: After the waste plastics are recycled, they are first classified, broken into pieces, cleaned, and then the chips are melted to form new plastic raw material pellets and finished products for recycling.

In the existing equipment, there is no plastic cyclone sorting cleaning device.

Generally, the sorting plastics are all sorted by flotation, which is inefficient and costly. For waste plastic fragments with a density greater than water, the brine solution is usually used as a fluid medium for flotation cleaning. The fluid medium used is difficult to handle and pollutes the environment after discharge.

The cleaning of the sediment and impurities of the waste plastic fragments is mainly carried out manually or mechanically. For the cleaning of waste plastic chips with a density greater than water, one method is to use an aqueous solution of a halide to increase the density of the fluid medium to achieve flotation cleaning; one method is to provide a stirring device at the bottom of the washing tank (water) Under cleaning, it is difficult to separate waste plastic debris, sand and impurities.

Therefore, it is necessary to introduce a special sorting and cleaning device to realize automatic sorting of waste plastic fragments having a density greater than that of the fluid medium, waste plastic fragments having a lower density than the fluid medium, sediment and impurities, and at the same time, cleaning the waste plastic fragments. Automate and continuous operation process to effectively improve processing efficiency. Summary of the invention

In view of the technical problems existing in the prior art, the object of the present invention is to provide a cyclone sorting and cleaning device and method for waste plastic fragments which are simple in structure, can be continuously produced, and efficiently realize sorting and cleaning of waste plastic chips. .

In order to achieve the above object, the present invention uses the following technical solutions:

A cyclone sorting and cleaning device for waste plastic chips, comprising: a conical tank, an inlet pipe, a sediment isolation net, a top feed port, a top discharge pipe and a side wall discharge pipe; The inverted cone has a sand discharge port at the bottom; the sediment isolation net that allows only the sediment and impurities to pass through is located in the conical tank, the shape is wide and narrow, and the upper end is open; the inlet pipe is connected to the conical tank along the tangential direction. The side wall extends into the sediment isolation net; the top feed port is located at the top of the conical tank; the top discharge pipe position At the top of the conical tank; the side wall discharge pipe is connected to the side wall of the conical tank along the tangential direction of the conical tank and extends into the sedimentation net. After using this structure, automatic sorting of waste plastic fragments with a density greater than that of the fluid medium, waste plastic fragments with a density lower than that of the fluid medium, sediment and impurities can be realized, and the waste plastic fragments can be cleaned to realize the operation process. Automated and continuous, effectively improving processing efficiency. A small gap is left between the upper end edge of the sediment isolation net and the inner wall of the conical tank, and the gap between the outer wall of the sediment isolation net and the inner wall of the conical tank can be gradually increased from the top to the bottom.

The cyclone cleaning apparatus for waste plastic chips further includes a cylindrical outer casing; the conical can is located within the outer casing, and the top of the conical can is fixed to the rounded top of the outer casing. After adopting this structure, the outer casing effectively protects the conical tank, and the appearance is beautiful, and the placement of the swirl sorting cleaning device is also facilitated.

The sediment isolation net is inverted conical; the inner wall of the conical tank is provided with a spiral groove, and the edge of the spiral groove abuts against the outer wall of the sedimentation net. After using this structure, the spiral groove is close to the outer wall of the sediment isolation net, which slows the flow rate of the fluid medium outside the sediment isolation net, so that the sediment and impurities can be subjected to gravity along the spiral groove. It slides down to the bottom of the conical tank for easy collection and separation of sediment and impurities.

The tapered can includes a tapered conical portion at the lower end and a cylindrical portion at the upper end; the inlet pipe is located at the conical portion, and the side wall discharge pipe is located at the cylindrical portion. With this configuration, the inverted cone facilitates swirling of the fluid medium and simultaneously pushing up until the waste plastic debris is pushed to the side wall of the cylindrical portion. The discharge tube is discharged with the fluid medium.

There are several inlet pipes, which are arranged in parallel with each other. With this structure, the structure of the multiple inlet pipes can maximize the force of the fluid medium entering the conical tank compared with the structure of one inlet pipe, thereby enhancing the swirling effect and eliminating the "dead angle".

The top discharge pipe is disposed along the axial direction of the tapered can, and the lower end of the top discharge pipe extends into the cylindrical portion. When this structure is used, the discharge of waste plastic fragments having a density smaller than that of the fluid medium is facilitated.

The inner wall of the sediment isolation net is undulating. After using this structure, the friction between the inner wall of the sediment isolation net and the waste plastic fragments is strengthened, and the sand and impurities adhering to the waste plastic fragments are cleaned up to improve the cleaning effect of the waste plastic fragments.

Swirl sorting and cleaning method for waste plastic chips of a cyclone sorting and cleaning device using waste plastic chips, materials to be treated mixed with waste plastic fragments, sediments and impurities of different density from the top feed inlet into the cone The shaped tank and the sediment are separated into the net; the fluid medium applied for cleaning enters the sediment isolation net from the inlet pipe along the tangential direction, forming a high-speed swirling flow in the sediment isolation net; the material swirls with the fluid medium at high speed, generating centrifugal force , wherein the dense plastic waste pieces form a large centrifugal force during the rotation process, and are thrown at high speed to the inner wall of the sediment isolation net and rise along the tapered shape of the fluid medium, and are discharged from the side wall discharge pipe; The centrifugal force generated by the debris is small, and it is gathered toward the center of the conical tank under the extrusion of the dense plastic waste pieces, so as to enter the top discharge pipe and discharge the conical tank; the sediment and impurities pass through the sedimentation net and enter the mud. The space between the sand isolation net and the conical tank slides down along the inner wall of the conical tank by gravity, from the discharge port Discharge.釆 After this method, two kinds of waste plastic fragments of different sizes are separated by swirling; the sediment and impurities are separated by cyclone and isolation. At the same time, in addition to the isolation function of sediment and impurities, the sediment isolation net has a spiral groove between the inner wall of the conical tank and the sediment isolation net, which effectively slows the flow velocity of the fluid medium outside the sediment isolation net. Facilitate the deposition of sediment and impurities.

The inner wall of the sediment isolation net undulates and rubs against the waste plastic fragments to separate the sediment and impurities adhering to the surface of the waste plastic fragments.这种 After using this method, the friction between the inner wall of the sediment isolation net and the waste plastic fragments is strengthened, and the sand and impurities adhering to the waste plastic fragments are cleaned up to improve the cleaning effect of the waste plastic fragments.

After the fluid medium is discharged from the side wall discharge pipe, it enters the dewatering machine and separates from the waste plastic debris, and then enters the conical tank from the inlet pipe through the water circulation system to realize recycling.这种Using this method, the amount of fluid medium is effectively saved.

In general, the present invention has the following advantages: The structure is simple, the processing efficiency is effectively improved, the automation and continuity of the operation process are realized, and the sorting and cleaning of the waste plastic fragments can be simultaneously realized. DRAWINGS

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is an elevational view of one embodiment of a cyclone sorting and cleaning apparatus for waste plastic chips of the present invention.

Figure 2 is a plan view of the cyclone sorting and cleaning device of the waste plastic chips shown in Figure 1.

Figure 3 is a half cross-sectional view of Figure 2.

Among them, 1 is a conical tank, 2 is an inlet pipe, 3 is a sediment isolation net, 4 is a side wall discharge pipe, 5 is a top discharge pipe, 6 is a top feed port, 7 is an outer casing, 11 is a cylinder The shape portion, 12 is a tapered portion, 13 is a spiral groove, and 14 is a sand discharge port. detailed description

The invention will be further described in detail below with reference to the drawings and specific embodiments.

The swirling sorting and cleaning device for waste plastic chips shown in Figs. 1 to 3 includes a conical tank 1, an inlet pipe 1, a sediment isolation net 3, a side wall discharge pipe 4, a top discharge pipe 5, and a top inlet Feed port 6 and outer casing 7.

The tapered can 1 includes a tapered tapered portion 12 located below and a cylindrical portion 11 located above. Conical tank

The entire inner wall of 1 is provided with a spiral groove 13 for the sediment and impurities to be discharged along the bottom of the conical tank 1 to be discharged. The bottom is provided with a sand discharge port 14 , which is connected to a screw hoist for continuous discharge of sediment and impurities, and ensures that the fluid medium does not flow out of the discharge port 14 .

The inlet pipe 2 is connected to the side wall of the tapered tank 1 and extends into the inside of the sediment separating net 3, specifically, the position corresponds to the side wall of the tapered portion 12. There are a plurality of inlet pipes 2 (four in this embodiment) which are arranged in parallel with each other; the inlet pipe 2 is located in the tangential direction of the conical tank, so that when the fluid medium enters the conical tank 1 from the inlet pipe 2, a large impulse can be formed. Lifting cone The swirling effect of the fluid medium in the tank 1.

The sediment isolation net 3 has an inverted cone shape corresponding to the conical tank 1, and is installed in the conical tank 1 with a small gap between the inner wall of the conical tank 1. The spiral groove 13 on the inner wall of the conical tank is tightly attached to the outer wall of the sediment isolation net 3, thereby slowing the flow velocity outside the sediment isolation net 3, facilitating the deposition of sediment and impurities. The sediment isolation net 3 may be a warp braided net, a weft braided net, a mesh net or a net having a wavy surface. As long as the mesh size is suitable, it can block the throwing of waste plastic fragments and allow sediment and Impurities can pass. The inner wall of the sediment isolation net is undulating, and the friction between the sediment isolation net and the waste plastic fragments is increased. This undulation may be formed by the texture of the sediment isolation net itself, or may be provided with a bump in the sediment isolation net. And / or embossed. The warp weaving net refers to the silt segregation net surrounded by a plurality of weft-aligned net wires, and the remaining net wires are arranged in a warp (vertical) manner. The weft-arranged net refers to a network of wires arranged by a plurality of warp-separated nets, and the remaining nets are arranged in a weft (圏-like) manner. Grid network refers to the network formed by the intersection of network lines. A net having a wavy surface means that the mesh is not flattened after being arranged, the warp is superposed on the weft or the weft is superposed on the warp, and the overlapping portion causes the surface of the net to undulate and form a wave.

The side wall discharge pipe 4 is connected to the side wall of the cylindrical portion 11 of the tapered tank 1, i.e., near the upper end of the tapered can 1. The projection of the side wall discharge pipe 4 on the horizontal plane is located in the tangential direction of the tapered can 1 so as to be easily thrown along the tangential direction. The side wall discharge pipe 4 is led out of the conical tank 1, and the outlet of the side wall discharge pipe is higher than the top of the conical tank to maintain the liquid level in the conical tank. The fluid medium exits the side wall discharge tube 4, and the flowing fluid medium further promotes the discharge of waste plastic fragments having a density greater than that of the fluid medium.

The top discharge pipe 5 is mounted at the top of the tapered can 1 and inserted into the cylindrical portion 11 of the tapered can 1 from above. The top discharge pipe 5 is disposed in the vertical direction and coincides with the axis of the tapered can 1, i.e., at the top center of the tapered can 1, facilitating the discharge of waste plastic fragments having a density smaller than that of the fluid medium.

The top feed port 6 is located at the top of the conical tank 1 and communicates with the interior of the sediment isolation net 3 for material input. The outer casing is cylindrical, divided into a cylindrical side wall and a circular bottom plate, and the tapered can 1 is inserted into the outer casing 7 from above the outer casing 7. The outer casing 7 is designed to enhance the overall appearance of the device, protect the internal structure, and facilitate the placement and installation of the device.

A cyclone separation cleaning method for waste plastic chips, which is mixed with waste plastic fragments, sediments and impurities of different density. The material is put into the conical tank from the top feeding port, and the fluid medium enters the sedimentation net from the inlet pipe along the tangential direction to form a high-speed swirling flow in the sediment isolation net; the material swirls with the fluid medium at high speed to generate centrifugal force. The high-density waste plastic fragments form a large centrifugal force during the rotation process. Due to the blockage of the sediment isolation net, the high-density waste plastic fragments are thrown at high speed toward the inner wall of the conical tank and rise with the fluid medium, and finally The side wall discharge pipe discharges the conical tank; the small-density waste plastic pieces form a centrifugal force smaller, and are gathered toward the center of the conical tank under the squeeze of the dense plastic waste pieces. Thereby entering the top discharge pipe to discharge the conical tank; the sediment and impurities pass through the sedimentation net and enter the space between the sediment isolation net and the conical tank; since both sides of the spiral groove are close to the sedimentation net On the inner wall, the flow velocity outside the sedimentation net is slowed down, which facilitates the deposition of sediment and impurities. The sediment and impurities slide down along the inner wall of the conical tank by gravity, and are discharged from the discharge port; A fluid medium circulation system is installed between the pipe and the inlet pipe, so that the fluid medium is reused and the amount is saved.

In the above process, the inner wall of the sediment isolation net undulates and rubs against the waste plastic fragments to separate the sediment and impurities adhering to the surface of the waste plastic fragments.

In addition to the manners mentioned in this embodiment, the spiral grooves may be provided in two, three or even more. The number of inlet pipes can also be set to other than four. The manner of transformation here is within the scope of protection of the present invention.

The above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and modifications may be made without departing from the spirit and scope of the invention. Simplifications, which are equivalent replacement means, are included in the scope of the present invention.

Claims

Rights request

1. A cyclone sorting and cleaning device for waste plastic chips, comprising: a conical tank, an inlet pipe, a sediment isolation net, a top feed port, a top discharge pipe and a side wall discharge pipe; The shaped can is integrally inverted, and the bottom is provided with a sand discharge port; the sediment isolation net for allowing only sediment and impurities to pass is located in the tapered can, which is wide and narrow in shape and has an open upper end; Accessing the side wall of the conical tank along a tangential direction and extending into the sediment barrier; the top feed port is located at the top of the conical tank; the top discharge tube is located at the cone a top of the shaped can; the side wall discharge pipe is connected to the side wall of the tapered can along the tangential direction of the tapered can and extends into the sediment barrier.

2. The cyclone sorting and cleaning device for waste plastic chips according to claim 1, further comprising: a cylindrical outer casing; said conical tank being located in said outer casing, said top of said conical tank being fixed On the top of the circle of the outer casing.

3. The cyclone separation cleaning device for waste plastic chips according to claim 1, wherein: the sediment isolation net is inverted conical; the inner wall of the conical can is provided with a spiral groove. The edge of the spiral groove abuts against the outer wall of the sediment barrier.

4. The cyclone sorting and cleaning device for waste plastic chips according to claim 1, wherein: said tapered can comprises a tapered portion at the lower end and a cylindrical portion at the upper end; The inlet pipe is located at the tapered portion, and the side wall discharge pipe is located at the cylindrical portion.

The cyclone sorting and cleaning device for waste plastic chips according to claim 4, wherein: the plurality of water inlet pipes are disposed in parallel with each other.

6. The cyclone sorting and cleaning device for waste plastic chips according to claim 4, wherein: said top discharge pipe is disposed along an axial direction of said tapered can, and said lower end of said top discharge pipe Extends into the cylindrical portion.

7. The cyclone sorting and cleaning device for waste plastic chips according to claim 1, wherein: the inner wall of the sediment isolation net is undulating.

8. A cyclone sorting and cleaning method for waste plastic chips using a spinning sorting and cleaning device for waste plastic chips according to any one of claims 1 to 7, characterized in that the material to be treated is mixed with a density greater than that of the fluid medium Waste plastic fragments, waste plastic fragments having a lower density than the fluid medium, sediment and impurities, the material entering the conical tank and the sediment isolation net from the top feed inlet of the cyclone sorting cleaning device; The medium enters the sediment isolation net from the inlet pipe of the cyclone sorting cleaning device along the tangential direction to form a high-speed swirling flow in the sediment isolation net; the material is swirled at a high speed with the fluid medium to generate centrifugal force, wherein the density is greater than The waste plastic fragments of the fluid medium form a large centrifugal force during the rotation process, and are thrown at high speed to the inner wall of the sediment isolation net and rise along the tapered shape of the fluid medium, and are discharged from the side wall discharge pipe; the density is less than the flow The waste plastic fragments of the bulk medium form less centrifugal force, and are gathered toward the center of the conical tank under the extrusion of the waste plastic fragments having a density greater than the fluid medium, thereby entering the top discharge pipe and discharging the conical tank; the sediment and impurities pass through The sediment isolation net enters the space between the sediment isolation net and the conical tank, and slides along the inner wall of the conical tank by the action of gravity, and is discharged from the discharge port.

9. The method according to claim 8, wherein: the inner wall of the sediment isolation net of the cyclone separation cleaning device is undulated, and rubs against the waste plastic fragments. Sediment and impurities adhering to the surface of the waste plastic fragments are separated.

The method according to claim 8, wherein the fluid medium is discharged from the side wall discharge pipe of the cyclone sorting and cleaning device, and then enters the dewatering machine. After the waste plastic fragments are separated, they are again re-entered into the conical tank from the inlet pipe of the cyclone sorting and cleaning device through the water circulation system to realize recycling.