CN111438838A - Method for regenerating and granulating waste EPS hot melt material and control system - Google Patents
Method for regenerating and granulating waste EPS hot melt material and control system Download PDFInfo
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- CN111438838A CN111438838A CN202010398985.3A CN202010398985A CN111438838A CN 111438838 A CN111438838 A CN 111438838A CN 202010398985 A CN202010398985 A CN 202010398985A CN 111438838 A CN111438838 A CN 111438838A
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- 239000002699 waste material Substances 0.000 title claims abstract description 49
- 239000012943 hotmelt Substances 0.000 title claims abstract description 36
- 238000000034 method Methods 0.000 title claims description 17
- 230000001172 regenerating effect Effects 0.000 title claims description 6
- 229910052751 metal Inorganic materials 0.000 claims abstract description 30
- 239000002184 metal Substances 0.000 claims abstract description 30
- 238000005469 granulation Methods 0.000 claims abstract description 22
- 230000003179 granulation Effects 0.000 claims abstract description 22
- 230000008929 regeneration Effects 0.000 claims abstract description 16
- 238000011069 regeneration method Methods 0.000 claims abstract description 16
- 239000000155 melt Substances 0.000 claims description 32
- 238000001914 filtration Methods 0.000 claims description 24
- 239000012535 impurity Substances 0.000 claims description 17
- 238000010438 heat treatment Methods 0.000 claims description 15
- 238000004064 recycling Methods 0.000 claims description 14
- 238000007599 discharging Methods 0.000 claims description 13
- 238000005520 cutting process Methods 0.000 claims description 10
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- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 9
- 150000002739 metals Chemical class 0.000 claims description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 8
- 238000002156 mixing Methods 0.000 claims description 8
- 238000002844 melting Methods 0.000 claims description 7
- 230000008018 melting Effects 0.000 claims description 7
- 239000004088 foaming agent Substances 0.000 claims description 6
- 239000011888 foil Substances 0.000 claims description 5
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- 229910000617 Mangalloy Inorganic materials 0.000 claims description 4
- 229910000990 Ni alloy Inorganic materials 0.000 claims description 4
- 238000011001 backwashing Methods 0.000 claims description 4
- ZGDWHDKHJKZZIQ-UHFFFAOYSA-N cobalt nickel Chemical compound [Co].[Ni].[Ni].[Ni] ZGDWHDKHJKZZIQ-UHFFFAOYSA-N 0.000 claims description 4
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- 239000010949 copper Substances 0.000 claims description 4
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- 229910052742 iron Inorganic materials 0.000 claims description 4
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- 229920005989 resin Polymers 0.000 claims description 4
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- 239000010935 stainless steel Substances 0.000 claims description 4
- 229910001220 stainless steel Inorganic materials 0.000 claims description 4
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- OFBQJSOFQDEBGM-UHFFFAOYSA-N n-pentane Natural products CCCCC OFBQJSOFQDEBGM-UHFFFAOYSA-N 0.000 description 3
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 2
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- 230000000694 effects Effects 0.000 description 2
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- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 1
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- 230000008030 elimination Effects 0.000 description 1
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- 229920005669 high impact polystyrene Polymers 0.000 description 1
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- IJDNQMDRQITEOD-UHFFFAOYSA-N n-butane Chemical compound CCCC IJDNQMDRQITEOD-UHFFFAOYSA-N 0.000 description 1
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Images
Classifications
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- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
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- B29B7/00—Mixing; Kneading
- B29B7/02—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type
- B29B7/22—Component parts, details or accessories; Auxiliary operations
- B29B7/26—Component parts, details or accessories; Auxiliary operations for discharging, e.g. doors
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
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- B29C48/25—Component parts, details or accessories; Auxiliary operations
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- B29C48/655—Screws with two or more threads having three or more threads
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- B29C48/25—Component parts, details or accessories; Auxiliary operations
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- B29C48/64—Screws with two or more threads
- B29C48/66—Barrier threads, i.e. comprising primary and secondary threads whereby the secondary thread provides clearance to the barrel for material movement
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- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
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- B29B13/00—Conditioning or physical treatment of the material to be shaped
- B29B2013/005—Degassing undesirable residual components, e.g. gases, unreacted monomers, from material to be moulded
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B29B2017/0424—Specific disintegrating techniques; devices therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
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- B29C2948/92504—Controlled parameter
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92819—Location or phase of control
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
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- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
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- Y02W30/62—Plastics recycling; Rubber recycling
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- Engineering & Computer Science (AREA)
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- Environmental & Geological Engineering (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
A control system for regeneration and granulation of waste EPS hot melt materials comprises a conveying belt I, a pulverizer, a conveying belt II, a homogenization bin, a metal separator, a spiral conveyor, a feeder, a double-screw extruder, a filter I, a filter II, a mouth mold, a granulator, a vibrating screen, a finished product bin and a P L C controller.
Description
Technical Field
The invention relates to a method and a control system for waste plastic regeneration granulation, in particular to a method and a control system for waste EPS hot melt material regeneration granulation.
Background
Since the invention of plastics by human, 83 hundred million tons of plastic products are produced globally, 63 million tons of the products are discarded after being used as waste plastics, wherein only 5.7 million tons of the waste plastics are recycled, and the rest 50 million tons of the waste plastics are discarded in all corners of the world. At present, about 580 million tons of waste EPS hot melt EPS plastics are produced in the world every year, wherein about 180 million tons of waste EPS foam plastics are produced in China every year, and except for a few developed countries, the waste EPS foam plastics in most countries are not effectively recycled and utilized, so that serious resource waste and environmental pollution are caused.
The double-screw extruder has good shearing, plasticizing, blending, exhausting and devolatilization performances, short material residence time in the screw, and is suitable for regeneration and modification processing of various waste plastics, compared with the conventional single-screw extrusion, the double-screw extruder not only can improve the material processing efficiency and productivity and improve the quality of regenerated particles, but also can achieve the purposes of reducing energy consumption and saving cost, but the waste EPS plastic has wide sources and has the following characteristics of ①, unstable material property, non-EPS resin impurities, ②, various metal and non-metal impurities, ③, various residual additives such as foaming agents or flame retardants, ④, high water content, ⑤, irregular shape, large density fluctuation, ⑥, and easy degradation after multiple thermal histories, so that the double-screw extruder has large extrusion fluctuation, high particle impurities, high moisture content, low production efficiency, high energy consumption, large raw material loss and high failure rate when being granulated.
Disclosure of Invention
In order to solve the technical problems, the invention provides a method and a control system for regenerating and granulating waste EPS hot melt materials.
The technical scheme adopted by the invention for solving the technical problems is as follows: a method for regenerating and granulating waste EPS hot melt materials comprises the steps of conveying large blocks of waste EPS hot melt materials into a crusher by a conveying belt I to be crushed, and conveying the crushed materials forwards after falling on a conveying belt II; after magnetic metals such as iron, manganese steel, cobalt-nickel alloy and the like in the materials are removed by the permanent magnet roller on the conveying belt II, the materials enter a homogenizing silo to be dispersed and mixed; the mixed materials pass through a metal separator when coming out of a discharge screw of a homogenizing silo, and other non-magnetic metals such as stainless steel, copper, aluminum and the like contained in the materials are removed; the material enters a screw conveyor, is conveyed into a hopper of a feeding machine through the screw conveyor, and is fed into a double-screw extruder by the feeding machine; after the melting, mixing and exhaust treatment of the double-screw extruder, the material is in a melt state and residual foaming agent contained in the material is removed; the melt is pre-filtered through a filter I, large impurities such as paper scraps, wood chips, aluminum foils and the like larger than 500-800 microns in the melt are blocked in front of a filter screen of the filter I, and the impurities are removed every 12-24 hours; the melt after pre-filtration is subjected to precision filtration by a filter II, fine sand, non-PS resin and other impurities with the size of 210-250 mu m-500-800 mu m in the melt are blocked in front of a filter screen of the filter II, and are continuously discharged out of the filter II; and extruding and molding the melt subjected to precise filtration through a mouth die, cutting the melt into granules by a granulator, dehydrating and drying the granules by a vibrating screen, and then entering a finished product bin for caching.
The size of the crushed hot melt material is 5-12 mm.
The time for continuously mixing the materials in the homogenizing silo is 2-3 hours.
The feeding frequency of the feeder is 40-60 Hz.
The rotating speed of the double-screw extruder is 320-480 rpm, the heating temperature of the 1 st section of the double-screw extruder is set to be 60-80 ℃, the heating temperature of the 2 nd-3 rd sections of the double-screw extruder is set to be 190-200 ℃, the heating temperature of the 4 th-7 th sections of the double-screw extruder is set to be 200-210 ℃, and the heating temperature of the 8 th-10 th sections of the double-screw extruder is set to be 190-200 ℃.
And naturally exhausting the melt at a 3 rd cylinder of a double-screw extruder, vacuumizing and exhausting at a 6 th cylinder at a vacuum degree of-0.5 to-0.6 MPa, and vacuumizing and exhausting at a 9 th cylinder at a vacuum degree of-0.7 to-0.8 MPa.
The heating temperature of the filter I, the filter II and the neck mold is set to be 200-210 ℃, the melt pressure before the filter I is 7-8 MPa, the melt pressure between the filter I and the filter II is 5-7 MPa, and the melt pressure between the filter II and the neck mold is 3-5 MPa.
The control system for regeneration and granulation of the waste EPS hot melt materials comprises a conveying belt I, a pulverizer, a conveying belt II, a homogenizing storage bin, a metal separator, a screw conveyor, a feeding machine, a double-screw extruder, a filter I, a filter II, a mouth mold, a granulator, a vibrating screen, a finished product storage bin and a P L C controller, wherein the conveying belt I is connected with a feeding port of the pulverizer, a feeding end of the conveying belt II is positioned at the lower part of a discharging port of the pulverizer, a discharging port of the conveying belt II is connected with a forced feeding screw of the homogenizing storage bin, a discharging screw of the homogenizing storage bin is connected with the metal separator, the metal separator is connected with a feeding port of the screw conveyor, a discharging port of the screw conveyor is connected with a hopper of the feeding machine, the feeding screw of the feeding machine is connected with a feeding cylinder of the double-screw extruder, the filter I, the filter II, the mouth mold and the granulator are sequentially arranged at the rear end of the double-screw extruder, the vibrating screen is arranged behind the granulator, the vibrating screen is connected with the finished product storage bin, and the.
The crusher is a heavy crusher with an open rotating shaft.
And a roller above the feed opening of the conveying belt II is a permanent magnet roller, and a slag discharge opening is arranged below the feed opening.
The homogenizing silo consists of a forced feeding screw, a lifting screw and a discharging screw.
The metal separator is a pipeline type electromagnetic induction metal separator.
The feeding machine consists of a hopper, a feeding motor and a feeding screw rod, wherein the feeding motor is a variable frequency motor, and the feeding screw rod is a large-lead single screw rod.
The diameter of a screw of the double-screw extruder is 93.6mm, the specific torque grade is 7-12, and the length-diameter ratio is 40.
The barrel of the double-screw extruder consists of 10 sections of barrels, wherein the 1 st section of barrel is a feeding barrel, the 3 rd section of barrel is a natural exhaust barrel, the 6 th section of barrel and the 9 th section of barrel are vacuum exhaust barrels, and the rest of barrels are closed barrels.
The filter I is a double-plunger cylindrical surface backwashing filter, the filtering working surface is a double-plunger cylindrical surface, and the filtering area is larger than 1800cm2(ii) a The filter II is a continuous full-automatic rotary filter, the filtering working surface is a single-plunger cylindrical surface and can rotate continuously, and the filtering area is more than 1500cm2，A filter; pressure sensors are respectively arranged at the front end of the filter I, between the filter I and the filter II and between the filter II and the mouth mold.
The granulator is underwater strand cutting or water ring cutting.
The invention has the beneficial effects that: the invention has the characteristics of simple process, high production efficiency and better maintenance of the performance of the PS regenerated particles. The yield of the regeneration granulation of the waste EPS hot melt material is more than 2 times of that of the conventional method.
The conveyer belt is adopted for feeding before and after the pulverizer, the pulverizer can adapt to waste EPS hot melting materials with different shapes and sizes, feeding is stable, and material blocking is not easy to occur. And the discharge outlet of the conveying belt II adopts a permanent magnet roller, so that magnetic metals such as iron, manganese steel, cobalt-nickel alloy and the like contained in the crushed materials can be removed, and hard metals are prevented from entering subsequent equipment to cause damage or abrasion.
The rotating shaft in the cavity of the heavy pulverizer is open, and the heavy pulverizer has the advantages of large shearing force, low energy consumption and uniform shearing particles.
The waste EPS hot melt material comes from dozens of countries and regions around the world, and some EPS hot melt materials come from packing boxes of electrical appliances such as computers, televisions and the like; some are from foam boxes containing fruits, vegetables or seafood, and some are from insulation boards in the building industry; some contain a flame retardant, some contain a residual foaming agent, some contain an anti-aging agent, etc.; the unstable performance of the raw materials further increases the extrusion fluctuation of the double screw. The homogenizing silo is adopted, so that the effect of caching the pulverized materials is achieved, the pulverized materials can be mixed and homogenized, and the difference of the performances of the same batch of materials is reduced. The crushed material has poor fluidity, a forced feeding screw is arranged at a feeding port of the homogenizing stock bin, and a forced discharging screw is arranged at a discharging port, so that the phenomenon that the double-screw extruder is short of materials due to bridging of the materials is avoided.
A metal separator is arranged at a feed opening of the homogenizing silo, and the contained non-magnetic metals such as stainless steel, copper, aluminum and the like are removed by utilizing the principle of electromagnetic induction.
A feeding screw of the feeding machine adopts a single screw with a large lead, and in order to increase the contact area between the crushed materials and a double-screw feeding section, the feeding machine is favorable for quick blanking and the extrusion capacity is improved. The feeding motor adopts variable frequency speed regulation, and the rotating speed of a single screw is matched with the double-screw main machine to be adjustable, so that the balance and stability between the feeding amount and the extrusion amount are achieved.
The co-rotating twin-screw extruder has better plasticizing, shearing, mixing, devolatilizing and exhausting performances, can improve the comprehensive performance of regenerated particles, improve the production efficiency, and can achieve the purposes of saving energy, reducing consumption and reducing production cost. A small amount of foaming agents such as propane, butane, pentane and the like are remained in the waste EPS hot melting materials, and the waste EPS hot melting materials are easy to degrade after being subjected to multiple thermal histories. The invention optimizes and arranges the combination of the cylinder and the screw of the double-screw extruder, and effectively solves the problems of insufficient elimination of residual foaming agent and excessive degradation of materials in the process of regeneration granulation of EPS foam.
Waste EPS hot melting materials often contain a large amount of fine impurities such as paper scraps, wood chips, aluminum foils, sand and stones, and the like, and the conventional filter has short interval time for changing the filter screen, frequent operation and unsatisfactory filtering effect in the regeneration granulation process, thereby further causing the unfavorable situations of low production efficiency of regeneration granulation, high impurity content of polystyrene regeneration particles, limited application range and the like. The invention adopts two-stage filtration, the double-plunger cylindrical surface backwashing filter has the characteristic of large filtration area, a filter screen with the size of 500-800 mu m is used for coarse filtration, large impurities such as paper scraps, wood chips, aluminum foil and the like in materials are filtered, and the filter screen can be backwashed for one time within 12 hours. The continuous full-automatic rotary filter can realize continuous filtration without shutdown under the condition that the impurity content of the regenerated plastic is 5-10 percent, thereby reducing the shutdown time and ensuring the stable operation of a double-screw main machine; the pressure at the discharge die head of the double-screw extruder is reduced to 3-5MPa, so that the fluctuation of the pressure at the discharge port is reduced, and the extrusion is more stable; and the loss of the materials is greatly reduced, and the loss of the materials due to impurity filtration is reduced from 3 percent to 0.5 percent.
Compared with the conventional dry-type strand cutting machine, the water ring cutting or underwater strand cutting machine has the advantages of high yield, labor saving, no waste generation during automatic connection of broken strips, regular cutting and space saving.
The invention has wide adaptability, is not only suitable for the waste EPS hot melting material, but also suitable for the regeneration granulation of HIPS, ABS, PP, PE, PC and other waste plastics, and can be modified under the condition of increasing side feeding for high-quality regeneration and high-efficiency application, thereby further improving the performance and the added value of regenerated particles. Under the condition of the current plastic product compounding and diversification, the invention can provide a way for recycling the waste plastic to solve the contradiction between reasonable economic scale and flexible equipment configuration.
Drawings
FIG. 1 is a schematic diagram of the control system of the present invention.
Fig. 2 is a partial enlarged view of the control system of the present invention.
Detailed Description
The present invention will be further clearly understood from the specific examples of the present invention given below, but the following examples are not intended to limit the present invention.
Example 1: referring to fig. 1 and 2, a method for regenerating and granulating waste EPS hot melt materials, which comprises the steps of conveying large blocks of waste EPS hot melt materials into a crusher (2) by a conveying belt I (1) for crushing, dropping the crushed materials on a conveying belt II (3) and conveying forwards; after magnetic metals such as iron, manganese steel, cobalt-nickel alloy and the like in the materials are removed by a permanent magnet roller (31) on the conveying belt II (3), the materials enter a homogenizing silo (4) for dispersing and mixing; the mixed materials pass through a metal separator (5) when coming out of a discharge screw (43) of the homogenizing stock bin (4), and other non-magnetic metals such as stainless steel, copper, aluminum and the like contained in the materials are removed; the materials enter a screw conveyor (6) and are conveyed into a hopper (71) of a feeding machine (7) through the screw conveyor (6), and the materials are fed into a double-screw extruder (8) by the feeding machine (7); the materials are in a melt state after being melted, mixed and exhausted by a double-screw extruder (8), the melt is pre-filtered by a filter I (9), large impurities such as paper scraps, wood chips and aluminum foils with the particle size of more than 500-800 microns in the melt are blocked in front of a filter screen of the filter I (9), and the impurities are removed every 12-24 hours; the melt after pre-filtration is subjected to precision filtration by a filter II (10), fine sand, non-PS resin and other impurities with the size of 210-250 mu m to 500-800 mu m in the melt are blocked in front of a filter screen of the filter II (10), and are continuously discharged out of the filter II (10) of the filter II; the melt after the precise filtration is extruded and molded through a mouth mold (11), cut into granules by a granulator (12), dehydrated and dried through a vibrating screen (13), and then enters a finished product bin (14) for caching.
The size of the crushed hot melt material is 5-12 mm.
The time for continuously mixing the materials in the homogenizing silo (4) is 2-3 h.
The feeding frequency of the feeding machine (7) is 40-60 Hz.
The rotating speed of the double-screw extruder (8) is 320-480 rpm, the heating temperature of the 1 st section of the double-screw extruder (8) is set to be 60-80 ℃, the heating temperature of the 2 nd-3 rd sections of the double-screw extruder is set to be 190-200 ℃, the heating temperature of the 4 th-7 th sections of the double-screw extruder is set to be 200-210 ℃, and the heating temperature of the 8 th-10 th sections of the double-screw extruder is set to be 190-200 ℃.
And naturally exhausting the melt at a 3 rd cylinder of a double-screw extruder (8), vacuumizing and exhausting at a 6 th cylinder at a vacuum degree of-0.5 to-0.6 MPa, and vacuumizing and exhausting at a 9 th cylinder at a vacuum degree of-0.7 to-0.8 MPa.
The heating temperature of the filter I (9), the filter II (10) and the neck mold (11) is set to be 200-210 ℃, the melt pressure in front of the filter I (9) is 7-8 MPa, the melt pressure between the filter I (9) and the filter II (10) is 5-7 MPa, and the melt pressure between the filter II (10) and the neck mold (11) is 3-5 MPa.
The control system for regeneration and granulation of the waste EPS hot melt materials is composed of a conveying belt I (1), a pulverizer (2), a conveying belt II (3), a homogenizing silo (4), a metal separator (5), a screw conveyor (6), a feeding machine (7), a double-screw extruder (8), a filter I (9), a filter II (10), a neck mold (11), a granulator (12), a vibrating screen (13), a finished product silo (14) and a P L C controller (15), and is characterized in that the conveying belt I (1) is connected with a feeding port (21) of the pulverizer (1), a feeding end (31) of the conveying belt II (3) is located at the lower part of a discharge port (22) of the pulverizer (2), a discharge port (33) of the conveying belt II (3) is connected with a forced screw (41) of the homogenizing silo (4), a discharge screw (43) of the homogenizing silo (4) is connected with the metal separator (5), the metal separator (5) is connected with a feed port (61) of the screw conveyor (6), the screw conveyor (6) is connected with a feeding port (7) of the screw conveyor (7), the feeding port (7) is connected with the vibrating screen (13), and a feeding port (7) of the feeding machine (7) is connected with a feeding port (7) of the vibrating screen (13) and a feeding port (7) of the feeding machine (7) and a cylinder (7) for controlling the neck mold (7) and a cylinder (7) for controlling the feeding machine (.
The crusher (2) is a heavy crusher with an open rotating shaft.
The roller (32) above the feed opening (33) of the conveying belt II (3) is a permanent magnet roller, and a slag discharge opening (34) is arranged below the feed opening (33) in an inclined mode.
The homogenizing silo (4) consists of a forced feeding screw (41), a lifting screw (42) and a discharging screw (43).
The metal separator (5) is a pipeline type electromagnetic induction metal separator.
The feeding machine (7) consists of a hopper (71), a feeding motor (72) and a feeding screw (73), wherein the feeding motor (72) is a variable frequency motor, and the feeding screw (73) is a large-lead single screw.
The diameter of a screw of the double-screw extruder (8) is 93.6mm, the specific torque grade is 7-12, and the length-diameter ratio is 40.
The barrel of the double-screw extruder (8) consists of 10 sections of barrels, wherein the 1 st section of barrel is a feeding barrel, the 3 rd section of barrel is a natural exhaust barrel, the 6 th section of barrel and the 9 th section of barrel are vacuum exhaust barrels, and the rest of barrels are closed barrels.
The filter I (9) is a double-plunger cylindrical surface backwashing filter, the filtering working surface is a double-plunger cylindrical surface, and the filtering area is larger than 1800cm2(ii) a The filter II (10) is a continuous full-automatic rotary filter, the filtering working surface is a single-plunger cylindrical surface and can be continuously rotated, and the filtering area is more than 1500cm2，(ii) a Pressure sensors are respectively arranged at the front end of the filter I (9), between the filter I (10) and the filter II (10), and between the filter II (10) and the mouth mold (11)A device.
The granulator (12) is a water ring granulator.
Claims (17)
1. A method for regenerating and granulating waste EPS hot melt materials is characterized in that a conveying belt I conveys large blocks of waste EPS hot melt materials into a crusher for crushing, and the crushed materials fall onto a conveying belt II and are conveyed forwards; after magnetic metals such as iron, manganese steel, cobalt-nickel alloy and the like in the materials are removed by the permanent magnet roller on the conveying belt II, the materials enter a homogenizing silo to be dispersed and mixed; the mixed materials pass through a metal separator when coming out of a discharge screw of a homogenizing silo, and other non-magnetic metals such as stainless steel, copper, aluminum and the like contained in the materials are removed; the material enters a screw conveyor, is conveyed into a hopper of a feeding machine through the screw conveyor, and is fed into a double-screw extruder by the feeding machine; after the melting, mixing and exhaust treatment of the double-screw extruder, the material is in a melt state and residual foaming agent contained in the material is removed; the melt is pre-filtered through a filter I, large impurities such as paper scraps, wood chips, aluminum foils and the like larger than 500-800 microns in the melt are blocked in front of a filter screen of the filter I, and the impurities are removed every 12-24 hours; the melt after pre-filtration is subjected to precision filtration by a filter II, fine sand, non-PS resin and other impurities with the size of 210-250 mu m-500-800 mu m in the melt are blocked in front of a filter screen of the filter II, and are continuously discharged out of the filter II; and extruding and molding the melt subjected to precise filtration through a mouth die, cutting the melt into granules by a granulator, dehydrating and drying the granules by a vibrating screen, and then entering a finished product bin for caching.
2. The method for recycling granulation of waste EPS hot melt material according to claim 1, characterized in that: the size of the crushed hot melt material is 5-12 mm.
3. The method for recycling granulation of waste EPS hot melt material according to claim 1, characterized in that: the time for continuously mixing the materials in the homogenizing silo is 2-3 hours.
4. The method for recycling granulation of waste EPS hot melt material according to claim 1, characterized in that: the feeding frequency of the feeder is 40-60 Hz.
5. The method for recycling granulation of waste EPS hot melt material according to claim 1, characterized in that: the rotating speed of the double-screw extruder is 320-480 rpm, the heating temperature of the 1 st section of barrel of the double-screw extruder is set to be 60-80 ℃, the heating temperature of the 2 nd-3 rd section of barrel is set to be 190-200 ℃, the heating temperature of the 4 th-7 th section of barrel is set to be 200-210 ℃, and the heating temperature of the 8 th-10 th section of barrel is set to be 190-200 ℃.
6. The method for recycling granulation of waste EPS hot melt material according to claim 1, characterized in that: and naturally exhausting the melt at a 3 rd cylinder of a double-screw extruder, vacuumizing and exhausting at a 6 th cylinder at a vacuum degree of-0.5 to-0.6 MPa, and vacuumizing and exhausting at a 9 th cylinder at a vacuum degree of-0.7 to-0.8 MPa.
7. The method for recycling granulation of waste EPS hot melt material according to claim 1, characterized in that: the heating temperature of the filter I, the filter II and the neck mold is set to be 200-210 ℃, the melt pressure in front of the filter I is 7-8 MPa, the melt pressure between the filter I and the filter II is 5-7 MPa, and the melt pressure between the filter II and the neck mold is 3-5 MPa.
8. The control system for the regeneration granulation of the waste EPS hot melt material as claimed in claim 1, which comprises a conveying belt I, a pulverizer, a conveying belt II, a homogenizing silo, a metal separator, a screw conveyor, a feeding machine, a double-screw extruder, a filter I, a filter II, a mouth die, a granulator, a vibrating screen, a finished product silo and a P L C controller, and is characterized in that the conveying belt I is connected with a feeding port of the pulverizer, a feeding end of the conveying belt II is positioned at the lower part of a discharging port of the pulverizer, a discharging port of the conveying belt II is connected with a forced feeding screw of the homogenizing silo, a discharging screw of the homogenizing silo is connected with the metal separator, the metal separator is connected with a feeding port of the screw conveyor, a discharging port of the screw conveyor is connected with a hopper of the feeding machine, a feeding screw of the feeding machine is connected with a feeding cylinder of the extruder, the filter I, the filter II, the mouth die and the granulator are sequentially arranged at the rear end of the cylinder of the double-screw extruder, the vibrating screen is arranged behind the granulator, the vibrating screen is connected with the finished product silo, and the equipment is.
9. The control system for recycling and granulating the waste EPS hot melt material as claimed in claim 8, wherein the crusher is a heavy crusher with an open rotating shaft.
10. The control system for regeneration and granulation of the waste EPS hot melt according to claim 8, characterized in that the roller obliquely above the feed opening of the conveying belt II is a permanent magnet roller, and a slag discharge opening is arranged obliquely below the feed opening.
11. The control system for recycling and granulating waste EPS hot melt material as claimed in claim 8, wherein the homogenizing silo is composed of a forced feeding screw, a lifting screw and a discharging screw.
12. The control system for recycling and granulating of waste EPS hot melt material as claimed in claim 8, wherein the metal separator is a pipeline type electromagnetic induction metal separator.
13. The control system for recycling and granulating waste EPS hot melt material as claimed in claim 8, wherein the feeder comprises a hopper, a feeding motor and a feeding screw, the feeding motor is a variable frequency motor, and the feeding screw is a large-lead single screw.
14. The control system for regeneration and granulation of the waste EPS hot melt material as claimed in claim 8, wherein the diameter of a screw of the twin-screw extruder is 93.6mm, the specific torque grade is 7-12, and the length-diameter ratio is 40.
15. The control system for recycling granulation of waste EPS hot melt material according to claim 8, characterized in that: the cylinder body of the double-screw extruder consists of 10 sections of cylinder bodies, wherein the 1 st section of cylinder body is a feeding cylinder body, the 3 rd section of cylinder body is a natural exhaust cylinder body, the 6 th section of cylinder body and the 9 th section of cylinder body are vacuum exhaust cylinder bodies, and the rest of cylinder bodies are closed cylinder bodies.
16. The control system for recycling granulation of waste EPS hot melt material according to claim 8, characterized in that: the filter I is a double-plunger cylindrical surface backwashing filter, the filtering working surface is a double-plunger cylindrical surface, and the filtering area is larger than 1800cm2(ii) a The filter II is a continuous full-automatic rotary filter, the filtering working surface is a single-plunger cylindrical surface and can rotate continuously, and the filtering area is more than 1500cm2，A filter; pressure sensors are respectively arranged at the front end of the filter I, between the filter I and the filter II and between the filter II and the mouth mold.
17. The control system for recycling granulation of waste EPS hot melt material according to claim 8, characterized in that: the granulator is underwater strand cutting or water ring cutting.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112026046A (en) * | 2020-09-23 | 2020-12-04 | 郑州中远干燥工程有限公司 | Production device and process for recycling bottle flakes through recycling, granulating and reusing |
| CN112936644A (en) * | 2021-03-01 | 2021-06-11 | 河北北联重工机械科技有限公司 | EPS granule production facility |
| CN113681750A (en) * | 2021-08-21 | 2021-11-23 | 张传雷 | Polystyrene particle and preparation method thereof |
| CN115257091A (en) * | 2022-06-29 | 2022-11-01 | 惠州市普林摩斯无纺布有限公司 | Environment-friendly non-woven fabric for dredging and filtering river channel and preparation method thereof |
| CN115816693A (en) * | 2023-02-21 | 2023-03-21 | 张家港市普瑞塑胶机械有限公司 | PET plastic granulation production line based on waste polyester cloth |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112026046A (en) * | 2020-09-23 | 2020-12-04 | 郑州中远干燥工程有限公司 | Production device and process for recycling bottle flakes through recycling, granulating and reusing |
| CN112936644A (en) * | 2021-03-01 | 2021-06-11 | 河北北联重工机械科技有限公司 | EPS granule production facility |
| CN113681750A (en) * | 2021-08-21 | 2021-11-23 | 张传雷 | Polystyrene particle and preparation method thereof |
| CN115257091A (en) * | 2022-06-29 | 2022-11-01 | 惠州市普林摩斯无纺布有限公司 | Environment-friendly non-woven fabric for dredging and filtering river channel and preparation method thereof |
| CN115257091B (en) * | 2022-06-29 | 2024-02-23 | 惠州市普林摩斯无纺布有限公司 | Environment-friendly non-woven fabric for river dredging and filtering and preparation method thereof |
| CN115816693A (en) * | 2023-02-21 | 2023-03-21 | 张家港市普瑞塑胶机械有限公司 | PET plastic granulation production line based on waste polyester cloth |
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