CN110461928A

CN110461928A - A kind of polystyrene foam densification recyclable device and its working method

Info

Publication number: CN110461928A
Application number: CN201780087446.4A
Authority: CN
Inventors: 陈颂华
Original assignee: Individual
Current assignee: Individual
Priority date: 2017-04-28
Filing date: 2017-04-28
Publication date: 2019-11-15
Anticipated expiration: 2037-04-28
Also published as: WO2018195997A1; CN110461928B

Abstract

A kind of polystyrene foam densification recyclable device and its working method, the polystyrene foam densification recyclable device includes cooling bath (2), oil bath (1), conduction oil (11) are filled in the oil bath (1), the density of the conduction oil (11) is no more than 0.95 gram/cc, it fills in the cooling bath (2) for cooling water (21), the feed inlet for polystyrene foam block (31) to be added is arranged in the top of the oil bath (1), discharge port (12) to be opened/closed is arranged in the bottom end of the oil bath (1), the temperature of oil bath (1) interior conduction oil (11) is heated between 150 DEG C to 180 DEG C when use, become liquid polystyrene (32) to melt polystyrene foam block (31) melted by heat being placed in oil bath (1), polystyrene foam Air in block (31) overflows.

Description

A kind of polystyrene foam densification recyclable device and its working method

The invention name is as follows: polystyrene foam densification recovery device and working method thereof

[0001] The invention relates to the technical field of polystyrene foam recovery, in particular to a polystyrene foam densification recovery device and a working method thereof.

Background

[0002] EPS foam board-polystyrene foam board, EPS board, is a light high molecular polymer. Polystyrene resin is added with a foaming agent, and the polystyrene resin is heated with inches for softening to generate gas, so that the foam plastic with a hard closed-cell structure is formed; the heat-insulating composite board is mainly used in the fields of building wall bodies, roof heat insulation, composite board heat insulation, refrigeration houses, air conditioners, vehicles and ships heat insulation, floor heating, decoration carving and the like. The disposable use of EPS is a great waste of resources. The review article indicates that the volume of the waste plastics in the world is calculated, the EPS accounts for about half, and the annual abandonment amount is up to more than million tons. The EPS foam board is not easy to degrade automatically after being discarded, so that the environment is greatly polluted; therefore, the development of recovery, regeneration and regeneration of EPS also becomes the most urgent problem in the current EPS packaging industry; at present, EPS (expandable polystyrene) recovery treatment mainly comprises crushing recovery, hot melting recovery and chemical recovery, however, any recovery mode needs to be carried out in a centralized mode to reduce the recovery cost, and because the density of the polystyrene foam board is low, if the polystyrene foam board is directly recovered and transported to a centralized recovery treatment place, the required transportation cost of the polystyrene foam board far exceeds the self value of the polystyrene foam board, a polystyrene foam densification recovery device with simple structure, easy realization and low cost is needed, and the defoaming and volume reduction of polystyrene foam are realized.

Technical problem

[0003] The invention aims to provide a polystyrene foam densification recovery device with simple structure, easy realization and low cost and a working method thereof.

Solution to the problem

Technical solution

[0004] In order to solve the above technical problems, the polystyrene foam densification recovery apparatus provided by the present invention comprises: the heat conducting oil heating device comprises an oil bath groove, wherein heat conducting oil is filled in the oil bath groove, the density of the heat conducting oil is not more than 0.95 g/cubic centimeter, a feed inlet for adding polystyrene foam blocks is formed in the top end of the oil bath groove, and the temperature of the heat conducting oil in the oil bath groove is heated to 150 inches. And C to 180. And C, heating and melting the polystyrene foam block placed in the oil bath groove to form liquid polystyrene, wherein air in the polystyrene foam block overflows, the liquid polystyrene is settled to the bottom of the oil bath groove because the density of the liquid polystyrene is higher than that of the heat conduction oil, the oil bath groove stops heating after accumulating a certain amount of liquid polystyrene at the bottom of the oil bath groove, so that the heat conduction oil is cooled, the liquid polystyrene is cooled to form solid polystyrene, and the density of the solid polystyrene is about 1.04 g/cubic centimeter and is higher than that of the cooled heat conduction oil, so that the solid polystyrene is settled at the bottom of the oil bath groove, and the settled solid polystyrene is taken out to complete defoaming and volume reduction of the polystyrene foam.

[0005] Furthermore, the polystyrene foam densification recovery device also comprises a cooling tank, wherein water for cooling is filled in the cooling tank, a controllable discharge hole is arranged at the bottom end of the oil bath tank, after a certain amount of liquid polystyrene is accumulated at the bottom of the oil bath tank, the oil bath tank stops heating, the oil bath tank is moved to the position where the discharge hole at the bottom end of the oil bath tank is lower than the cooling water liquid level in the cooling tank, the discharge hole at the bottom end of the oil bath tank is punched to enable the liquid polystyrene to flow out into the cooling water in the cooling tank, solid polystyrene is formed after the cooling water is cooled, as the density of the solid polystyrene is higher than that of the cooling medium water, the solid polystyrene is deposited at the bottom of the cooling tank, and a small amount of heat conduction oil discharged from the oil bath tank can float to the surface of water due to the fact that the density of the heat conduction oil, easy to be recycled and cleaned.

[0006] Furthermore, the polystyrene foam densification recovery device also comprises a lifting device for driving the oil bath groove to lift, so that the oil bath groove can be arranged above the cooling groove in a lifting manner, the oil bath groove is in a heating state and is arranged above the cooling groove, and the oil bath groove stops heating, and the oil bath groove is driven by the lifting device to descend into the cooling groove, so that the operation is easy.

[0007] Furthermore, the polystyrene foam densification recovery device also comprises an induced draft fan and an exhaust hood, wherein the exhaust hood is arranged above the oil bath groove, and the inlet end of the induced draft fan is communicated with the exhaust hood through a pipeline, so that gas discharged by heating inches of the oil bath groove is subjected to bow I flow by the exhaust hood and a bow I fan and then is intensively discharged.

[0008] Further, the polystyrene foam densification recovery device further comprises a cooling groove mounting frame, wherein the cooling groove is arranged on the cooling groove mounting frame, and the bottom end of the cooling groove mounting frame is provided with a plurality of universal wheels, so that the cooling groove is convenient to move.

[0009] Further, the lifting device comprises a hoisting motor and a steel wire rope, the bottom end of the steel wire rope is fixedly connected with the oil bath groove, and the top end of the steel wire rope is fixedly connected with an output shaft of the hoisting motor, so that the hoisting motor rotates to wind the steel wire rope in inches, and the oil bath groove can be driven to lift.

[0010] The working method of the polystyrene foam densification recovery device comprises the following steps: [0011] a, closing a discharge hole at the bottom end of an oil bath groove, adding a proper amount of heat conduction oil into the oil bath groove, and starting the oil bath groove to heat so that the temperature of the heat conduction oil is maintained between 150 ℃ and 180 ℃; and adding a polystyrene foam block into the oil bath groove, wherein the polystyrene foam block floats on the surface of the heat conduction oil.

[0012] B, continuously heating the heat conduction oil to ensure that the polystyrene foam blocks floating on the surface of the heat conduction oil are gradually heated to be melted into liquid polystyrene and are settled to the bottom of the oil bath tank, and the air in the polystyrene foam blocks overflows

And starting the induced draft fan for centralized collection.

[0013] C, liquid polystyrene at the bottom of the oil bath groove accumulates to a preset amount of inches, heating of the oil bath groove is stopped, a winch motor is started to drive the oil bath groove to descend, the oil bath groove is suspended when a discharge port at the bottom of the oil bath groove descends to be placed in cooling water to stop descending, the oil bath groove is opened, the liquid polystyrene flows into the cooling water through the discharge port, and is cooled by the cooling water to form solid polystyrene which is deposited at the bottom of the cooling groove; the heat conducting oil flowing out with the liquid polystyrene floats to the surface of the cooling water.

[0014] D, after the liquid polystyrene at the bottom of the oil bath groove is emptied, closing a discharge hole at the bottom end of the oil bath groove; and starting the winch motor again to enable the oil bath groove to rise to be separated from the cooling groove, starting the oil bath groove to heat again, and continuously adding the polystyrene foam block into the oil bath groove.

[0015] And E, repeating the steps A to D to finish the defoaming and volume reduction of the polystyrene foam.

Advantageous effects of the invention

Advantageous effects

[0016] The invention has the technical effects that: compared with the prior art, the polystyrene foam is heated and melted by the heat conduction oil, the liquid polystyrene is cooled and solidified by the cooling water, the liquid polystyrene directly flows into the cooling water from the heat conduction oil, the heat conduction oil and the cooling water are isolated from air in the melting and solidifying process of the polystyrene, the polystyrene foam is prevented from contacting with the air again, and the densification efficiency is greatly improved; (2) the density of the heat conduction oil is smaller than that of cold water, so that the heat conduction oil flowing out along with the liquid polystyrene floats on the surface of the cooling water and is easy to recover; (3) the hoisting motor is adopted to drive the oil bath to lift, so that the polystyrene is completely isolated from the air in the melting and curing processes, and the densification efficiency is improved; (4) the heating inch of the oil bath groove is kept between 150 ℃ and 180 ℃, so that the evaporation loss of the heat conduction oil is avoided, the cost is saved, and the environment is protected; (5) the oil bath groove can be arranged in a lifting manner, so that the oil bath groove can be used for heating inches, and the oil bath groove is arranged above the cooling groove, so that the heat loss is reduced, and the energy is saved; and (6) the device defoams and reduces the volume of the polystyrene foam by adopting heat conduction oil and cooling water, the polystyrene foam is uniformly heated, the cost is low, and the device is easy to realize. Brief description of the drawings

Drawings

[0017] The invention is described in further detail below with reference to the drawings of the specification:

[0018] FIG. 1 is a schematic structural view showing a heated state of an oil bath of a polystyrene foam densification recovery apparatus according to example 1 of the present invention;

[0019] FIG. 2 is a schematic structural view showing a cooled state of an oil bath of the apparatus for densified polystyrene foam recovery according to example 1 of the present invention;

[0020] FIG. 3 is a schematic structural view showing a heated state of an oil bath of the apparatus for densified polystyrene foam recovery according to example 2 of the present invention;

[0021] FIG. 4 is a schematic view showing the construction of the polystyrene foam densification recovery apparatus of example 2 of the present invention, in which the oil bath is in a cooled state.

[0022] In the figure: the device comprises an oil bath tank 1, heat conduction oil 11, a discharge hole 12, a cooling tank 2, cooling water 21, a cooling tank placing frame 22, universal wheels 23, polystyrene foam blocks 31, liquid polystyrene 32, solid polystyrene 33, air 34, a draught fan 41, an exhaust hood 42, a stand column 43, a cross beam 44, a hoisting motor 45, an output shaft 46 and a steel wire rope 47

Modes for carrying out the invention

[0023] Example 1

[0024] The polystyrene foam densification recovery device comprises a cylindrical oil bath tank 1, as shown in fig. 1 to 2, the cylindrical oil bath tank 1 is a non-forced circulation high-pressure heat transfer system, heat conduction oil is filled in the oil bath tank 1, and the temperature of the heat conduction oil 11 is controlled in an electric heating mode; the heat conducting oil 11 can be selected to meet SH-T

0677-1999 Standard L-QB 280 standard thermal oil, the density is controlled between 0.91 g/cubic centimeter and 0.93 g/cubic centimeter, and the initial sliding point is not lower than 280 ℃. The top end of the oil bath groove 1 is provided with a charge port for adding heat conduction oil 11 and polystyrene foam blocks 31, and the heat conduction oil 11 in the oil bath groove 1 is heated to 150 ℃ by using inches. And C to 180. C, so that the polystyrene foam block 31 placed in the oil bath groove 1 is melted by heat to become liquid polystyrene 32, air 34 in the polystyrene foam block 31 overflows, the liquid polystyrene 32 is settled to the bottom of the oil bath groove 1 because the density of the liquid polystyrene 32 is greater than the density of the heat conduction oil 11, and after a certain amount of liquid polystyrene 32 is accumulated at the bottom of the oil bath groove 1, and (3) stopping heating the oil bath tank 1, cooling the heat conduction oil 11, and cooling the liquid polystyrene 32 to form solid polystyrene 33, wherein the density of the solid polystyrene 33 is about 1.04 g/cubic centimeter and is greater than that of the cooled heat conduction oil 11, so that the solid polystyrene 33 is deposited at the bottom of the oil bath tank 1, and the deposited solid polystyrene 33 is taken out to complete defoaming and volume reduction of the polystyrene foam.

[0025] Example 2

[0026] As shown in fig. 3 to 4, in addition to example 1, the polystyrene foam densification recovery apparatus of the present example further includes a cylindrical cooling tank 2, and the diameter of the cooling tank 2 is set to be 2 times the diameter of the oil bath tank 1; be equipped with in the cooling bath 2 and be used for the cooling water 21 of room temperature, the bottom of cooling bath 2 is supported by cooling bath arrangement frame 22, and the bottom four corners of cooling bath arrangement frame 22 sets up 4 universal wheels 23, is convenient for remove cooling bath arrangement frame 22 and cooling bath 2 for the below of oil bath 1 is arranged in to cooling bath 2. The bottom of oil bath 1 sets up discharge gate 12, and this discharge gate 12 sets up the solenoid valve in order to control its second break.

[0027] Polystyrene foam densification recovery unit is still including being used for driving oil bath 1 to carry out the elevating gear that goes up and down, this elevating gear includes the stand 43 that links to each other with ground is fixed, the fixed crossbeam 44 that sets up in top of stand 43, set up hoist motor 45 on the crossbeam 44, the output shaft 46 of this hoist motor 45 is fixed continuous with two wire rope 47, the top of oil bath 1 links to each other with wire rope 47's bottom stationary phase, so that the rotatory cun of hoist motor output shaft 46, receive and release wire rope 47, and then drive oil bath 1 and go up and down. The polystyrene foam densification recovery device further comprises an induced draft fan 41 and an exhaust hood 42, wherein the top end of the exhaust hood 42 is communicated with an air inlet of the induced draft fan 41 through a pipeline, the bottom end of the exhaust hood 42 is arranged in a horn shape, the oil bath tank 1 is in a heating state inch, and the bottom end of the exhaust hood 42 is covered above the oil bath tank 1, so that air exhausted by heating inches of the oil bath tank 1 can be collected by the induced draft fan 41 and the exhaust hood 42 and conveyed to an external air purification device (not shown in the figure) for purification.

[0028] Example 3

[0029] A working method of a polystyrene foam densification recovery device comprises the following steps:

[0030] a, closing a discharge hole 12 at the bottom end of the oil bath groove 1, and adding a proper amount of L-QB into the oil bath groove 1

280 type heat conduction oil 11, starting the oil bath tank 1 for heating, and keeping the temperature of the heat conduction oil 11 between 150 ℃ and 180 ℃; the crushed polystyrene foam blocks 31 are added into the oil bath tank 1, and because the density of the polystyrene foam blocks 31 is much less than that of the heat transfer oil 11, the polystyrene foam blocks 31 float on the surface of the heat transfer oil 11.

[0031] B, continuously heating the heat conduction oil 11 to enable the polystyrene foam blocks 31 floating on the surface of the heat conduction oil 11 to be gradually heated and melted to become liquid polystyrene 32, enabling air 34 in the polystyrene foam blocks 31 to overflow, starting the induced draft fan 41 to intensively collect the overflowed air 34 through the exhaust hood 42, and purifying the overflowed air by using external air purification equipment (not shown in the figure) to avoid directly discharging and polluting the environment; since the density of the liquid polystyrene 32 is about 1.2 g/cc, which is much higher than that of the heat transfer oil 11, the liquid polystyrene 32 sinks to the bottom of the oil bath 1.

[0032] C, continuously adding the polystyrene foam 31 into the oil bath 1, so that the molten liquid polystyrene 32 continuously sinks to the bottom end of the oil bath 1; when the liquid polystyrene 32 at the bottom of the oil bath groove 1 accumulates to a preset amount, the oil bath groove 1 is stopped being heated, the winch motor 45 is started to enable the oil bath groove 1 to descend into the cooling groove 2 and hover, the discharge port 12 at the bottom of the oil bath groove 1 is arranged in the cooling water 21, the top end opening of the oil bath groove 1 is still higher than the liquid level of the cooling water 21, the cooling water 21 is prevented from entering the oil bath groove 1, the height of the liquid level of the heat conduction oil 11 in the oil bath groove 1 is not lower than the height of the liquid level of the cooling water 21, the cooling water 21 is prevented from flowing back into the oil bath groove 1, the electromagnetic valve is started to enable the discharge port 12 of the oil bath groove 1 to be opened, the liquid polystyrene 32 at the bottom of the oil bath groove 1 flows into the cooling water 2 through the discharge port 12 and becomes solid polystyrene 33 after being cooled, because the density of the fixed polystyrene 33 is about 1.04 g/cubic centimeter and still greater than that of the cooling water 21, the solid polystyrene 33 is deposited at the bottom of the cooling tank 2 in the cooling and solidifying process; the heat transfer oil 11 flowing out with the liquid polystyrene 32 floats to the surface of the cooling water 21 because the density of the heat transfer oil 11 is less than that of the cooling water 21, and can be conveniently recycled.

[0033] D, after the liquid polystyrene 32 at the bottom of the oil bath groove 1 is emptied, the discharge hole 12 at the bottom end of the oil bath groove 1 is closed, the winch motor 45 is started again to enable the oil bath groove 1 to ascend to be separated from the cooling groove 2, the oil bath groove 1 is started to heat again to enable the heat conduction oil in the oil bath groove 1 to be maintained at 150-180 ℃, the polystyrene foam block 31 is continuously added into the oil bath groove 1, and meanwhile, the solid polystyrene 33 in the cooling groove 2 is collected through inches, and then the high-density solid polystyrene 33 can be obtained.

[0034] And E, repeating the steps A to D to finish the defoaming and volume reduction of the polystyrene foam.

[0035] It should be understood that the above examples are only for clearly illustrating the present invention and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. This list is neither intended to be exhaustive nor exhaustive. And such obvious variations or modifications which fall within the spirit of the invention are intended to be covered by the scope of the present invention.

Claims

Claims

A polystyrene foam densification recovery device is characterized by comprising: the oil bath tank is internally filled with heat conduction oil, the density of the heat conduction oil is not more than 0.95 g/cubic centimeter, the top end of the oil bath tank is provided with a feed inlet for adding the polystyrene foam block, the temperature of the heat conduction oil in the oil bath tank is heated to 150-180 ℃ by using inches, so that the polystyrene foam block arranged in the oil bath tank is heated and melted into liquid polystyrene, and air in the polystyrene foam block overflows; after a certain amount of liquid polystyrene is accumulated at the bottom of the oil bath groove, the oil bath groove stops heating, so that the heat conduction oil is cooled, and the liquid polystyrene is cooled into solid polystyrene.

The polystyrene foam densification recovery apparatus according to claim 1, further comprising a cooling tank, wherein the cooling tank contains water for cooling, a bottom end of the oil bath tank is provided with a controllable discharge port, after a certain amount of liquid polystyrene is accumulated at the bottom of the oil bath tank, the oil bath tank stops heating, the oil bath tank is moved to a position where the discharge port at the bottom end of the oil bath tank is lower than the level of the cooling water in the cooling tank, the discharge port at the bottom end of the oil bath tank is opened to allow the liquid polystyrene to flow out into the cooling water in the cooling tank, and the liquid polystyrene is cooled by the cooling water to form solid polystyrene.

The apparatus for densified polystyrene foam recovery according to claim 2, further comprising an elevating means for elevating the oil bath so that the oil bath is elevatably disposed above the cooling bath.

The apparatus for compacting and recovering polystyrene foam according to claim 3, further comprising an induced draft fan and an exhaust hood, wherein the exhaust hood is disposed above the oil bath tank, and an inlet end of the induced draft fan is communicated with the exhaust hood through a pipeline.

The apparatus for compacting and recycling styrofoam according to claim 4, further comprising a cooling bath mounting frame on which the cooling bath is mounted, the cooling bath mounting frame having a plurality of universal wheels provided at a bottom end thereof.

The apparatus for compacting and recycling styrofoam according to claim 5, wherein the elevating means includes a winding motor and a wire rope, a bottom end of the wire rope is fixedly connected to the oil bath, and a top end of the wire rope is fixedly connected to an output shaft of the winding motor.

7. The method of claim 6, comprising the steps of:

A. closing a discharge hole at the bottom end of the oil bath groove, adding a proper amount of heat conduction oil into the oil bath groove, and starting the oil bath groove to heat so that the temperature of the heat conduction oil is maintained between 150 ℃ and 180 ℃; adding polystyrene foam blocks into the oil bath groove, wherein the polystyrene foam blocks float on the surface of the heat-conducting oil

B. Continuously heating the heat conduction oil, so that the polystyrene foam blocks floating on the surface of the heat conduction oil are gradually heated and melted to become liquid polystyrene and are settled to the bottom of the oil bath tank, and the air in the polystyrene foam blocks overflows;

C. when the liquid polystyrene at the bottom of the oil bath groove accumulates to a preset amount of inches, the oil bath groove is stopped being heated, the winch motor is started to drive the oil bath groove to descend, when the oil bath groove descends to the position that a discharge port at the bottom end is arranged in cooling water to stop descending, the oil bath groove is suspended, a discharge port of the oil bath groove is opened, the liquid polystyrene flows into the cooling water through the discharge port, and is cooled by the cooling water to become solid polystyrene which is deposited at the bottom of the cooling groove; the heat conducting oil flowing out along with the liquid polystyrene floats to the surface of the cooling water;

D. after the liquid polystyrene at the bottom of the oil bath groove is emptied, closing a discharge hole at the bottom end of the oil bath groove; starting the winch motor again to enable the oil bath groove to rise to be separated from the cooling groove, starting the oil bath groove to heat again, and continuously adding the polystyrene foam block into the oil bath groove;

E. repeating the steps A to D to finish the defoaming and volume reduction of the polystyrene foam.