SU1353608A1 - Method of processing waste of thermoplastic materials in rotary sintering machine - Google Patents

Abstract

The invention relates to the processing of waste thermoplastics, in particular films, sheets, sensory products. The purpose of the invention is to improve the quality of the agglomerate due to the destruction of the goat, which forms after the introduction of the agent interrupting the agglomeration. The method includes the periodic loading of waste into the tank, agglomeration. The interruption of agglomeration is carried out by introducing an agglomeration interrupting agent into an agglomerator tank. Then, waste of thermoplastics is additionally introduced into the agglomerator tank in the form of runs and / or ingots, lumps. They have a linear size of 0.1 - 0.5 diameter of the agglomerator tank. The number of 5 - 15% of the mass of the load. With the additional introduction of waste, they are dispersed under the action of the blades of the agglomerator, spinning at high speed, and smash the goat. This contributes to the quality of the sinter. I W with: 00 JV her O)

Description

one

The invention relates to the field of recycling thermoplastic wastes, in particular films, sheets, blow moldings, foams, and the like, and can be used in enterprises processing plastic wastes.

The purpose of the invention is to improve the quality of the agglomerate by destroying the goat formed after the introduction of the agglomeration interrupting agent.

The essence of the method lies in the fact that the waste is periodically loaded into the cylindrical tank of the agglomerator, grinding, washing if necessary, heating, compaction, agglomeration, the introduction of an agent interrupting the agglomeration and periodic unloading. At the same time

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agent goat

interrupting the agglomeration is destroyed by addition of thermoplastic waste into the agglomerator tank in the form of runs and / or ingots of lumps, for example, formed during the synthesis and / or processing of thermoplastics having a linear size of 0.1-0.3 of the diameter of the agglomerator, in an amount of 5-15% from the mass of the load.

When introduced into the formed goat, the runs and / or ingots and / or lumps of the specified sizes in the specified amount are dispersed under the action of the blades of the agglomerator, rotating at high speed, and crush the goat. Subsequently, as shredded, these wastes prevent re-agglomeration. The need for a stage associated with the destruction of the formed goat arises when the stage of termination of the agglomeration is completed (by any known method).

The use of girders, ingots and lumps of smaller sizes does not allow splitting a goat, while larger sizes are not advisable due to the difficulty of loading and acceleration. The use of runs, - ingots and lumps in smaller quantities, does not allow to prevent re-agglomeration, in large quantities - does not give an additional effect and is fraught with the danger of overloading the drive of the agglomerator,

The common feature of all rotor – nü1X agglomerator designs is the presence of a vertical cylindrical tank in which it is coaxially mounted.

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rotary chopper. The main parameter determining the technological capabilities of the rotor type agglomerator is the diameter of the indicated container. Thus, the diameter of the tank characterizes fully enough any design of the rotary agglomerator (capacity of the container, design features of the shredder, power consumption, capacity, flow rate of the washing liquid, etc.). Consequently, the above ratios of the size of lumps and the specified diameter are essential and unambiguously determine the conditions necessary and sufficient to achieve the goal. The ratios given are determined in experiments for all types of rotary agglomerators in a size range of 500 to 1200 mm.

Example 1. A rotary agglomerator with a tank diameter of 1050 mm is loaded with 50 kg of used polyethylene bags from under a powdered polyvinyl acetate emulsion, simultaneously supplying wash water. After grinding and washing the waste water supply is stopped, further processing leads to self-heating of the material and its agglomeration. When the particles of the film dry out, traces of PVA inevitably remain on their surface5

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thirty

leads to the formation of a goat. Introduction of cold water cooling

air, finely divided film, polyethylene waste does not interrupt the agglomeration and does not destroy the goat. Goat destroy the introduction of ingots

40 polyethylene, formed during the cleaning of the extruder and having a linear dimension of 100-150 mm in the amount of 2.5 kg. After the destruction of the goat and the crushed ingots, the sinter is agglomerated. The agglomerate has the following

properties; the bulk density is 330 kg / m; the particle size of 2-8 mm is 85%.

Example 2, In a rotary agglome.

gg rator of example 1 load 55 kg of pure polystyrene film waste. The waste is crushed, heated, and agglomerated to form lumps measuring 20-160 mm. Cooling water is introduced to destroy the lumps formed, but polystyrene lumps cannot be destroyed. Introduction to the capacity of the agglomerator polystyrene ingots (waste synthesis) linear

500 to 525 mm in size and 8.25k in weight, it allows to break up lumps of agglomerate. Unloaded agglomerate has the following properties: bulk density 393 kg / m, particle size 2 - 8 mm 77%,

Example The agglomerator of example 1 is loaded with 55 kg of used shrink-free polyethylene film. The film is crushed, heated and agglomerated. The agglomeration is interrupted by the introduction of 3 liters of cooling water, however, due to the error of the agglomerator operator in determining the timing of the introduction of cooling water, the goat was destroyed by introducing 4.0 kg of polyethylene runs formed during adjustment of the injection molding machine to the mode and having the form of lumps and pieces with a linear dimension of 300 - 350 mm. The resulting agglomerate has the following properties: a bulk density of 355 kg / m%, a particle size of 2-8 mm 80%.

Example 4 Into the agglomerator, waste is loaded and treated as in Example 3. The agglomeration is interrupted by the introduction of 3 liters of cooling water. The agglomerate has the following properties: a bulk density of 360 kg / m, a particle size of 2 - 8 mm 80%,

Example 5, 8 kg of used film contaminated with PVA glue is loaded into a rotary agro-mixer with a diameter of 500 mm. After washing and grinding the waste, the agglomeration is interrupted by the introduction of water. However, residual glue leads to the formation of a goat. A goat is destroyed by the introduction of pieces of defective LDPE pipes with a size of 250 mm with a total weight of 1.1 kg, and the unloaded agglomerate has the following properties: a bulk density of 345 kg / m, a particle content of 2 - 8 mm 8Q 7

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Example A rotary agglomerator with a tank diameter of 900 mm is loaded with 40 kg of a film used for packing meat carcasses contaminated with residues of blood and animal fat. After washing and grinding the waste, the agglomeration is interrupted by the introduction of cooling water. However, blood and fat residues lead to the formation of a goat. The goat is destroyed by the introduction of the runs formed during the cleaning of the injection molding machine, weighing 2 kg and times

measure 90 mm. After the goat is destroyed, the sinter is unloaded. It has the following properties: a bulk density of 325 kg / m, a particle size of 2–8 mm, 81%.

Example 7, In a rotary agglomerator with a diameter of 1200 mm tank load 60 kg of worn PE bags

from under the chemicals. The contents of the bags could not be identified. After grinding, washing, heating, the waste began to agglomerate, and a strong smell of styrene was felt. The agglomeration is interrupted by the introduction of 2.2 kg of water. A goat was formed. Additionally, 2 kg of water was introduced, but the goat could not be destroyed. It is destroyed by the introduction of ingots of waste,

formed during the synthesis of LDPE and

pre-crushed hydraulic separator into pieces with a total weight of 9 kg and a size of 200 mm.

Example B, B rotary agglome

A rator with a diameter of 500 mm capacity is loaded with 7.5 kg of worn polyethylene film. Waste is crushed and washed. The agglomeration of waste is not interrupted, but the resulting goat:.

destroyed by the introduction of lumps of polyethylene with a size of 50 mm and a mass of 0.47 kg. The resulting agglomerate has the following properties: bulk density 277 kg / m, particle size

rum 2-8 mm 43%. The agglomerate is poor quality and rejects. This suggests that the destruction of a goat without the introduction of an agent that prevents agglomeration does not allow achieving

set goal

Example 9. A worn-out polyethylene film used in agricultural households is loaded into a rotary agglomerator with a diameter of 900 mm.

for shelter of haylage, in the amount of 42 kg. Waste is crushed, removed and agglomerated. The agglomeration is interrupted by the introduction of 1.3 kg of water, which is an operator's error (the required amount of water to stop the agglomeration is 1.7 kg). A goat is formed. The goat is destroyed by the introduction of 1.68 kg (4% of the mass of the load) of waste processing in the form of defective products,

having a size of 180 mm. A goat is not. collapses. After 10 seconds, due to a sharp increase in the resistance of the elastic mass, the rotor of the agglomerator wedges. Cleaning the sinter tank 513536086

Rattor from stuck mass is carried out. The agglomeration is terminated manually by two operators and consumes 0.8 kg of off-spec powder lasts 60 min. ATV. However, due to the residues of the bond Example 10, In a rotary agglome of it, a goat is formed. A goat converter with a tank diameter of 1150 mm is blocked by the introduction of lumps the size of 50 kg of worn polyethylene-300 mm (0.6 agglomerator diameter) film. The waste is ground, laundered in the amount of 1.2 kg. After 5 seconds, the mixture is agglomerated. The agglomerate preadmission of waste agglomerator rotor is carried out by the introduction of 2.0 kg of water. However, it is jammed due to overload. Purification due to the fact that water has an agglomerator's temperature of -0.0 is carried out with a tour of 20 ° C, and the mass of sediment is cooled to 40 minutes. is not effective enough

a goat is formed. The goat is destroyed. Thus, the advantages of introducing 9 kg (16% of the mass of the proposed method are: half loads) of the pieces formed at the 5th exclusion of emergencies through extruder runs, 500 mm in size. during the formation of a goat and associated However, with the introduction of this amount of idle time and hazardous waste operations with this amount, the rotor of the agglomerator gets stuck - cleaning the tank of the agglomerator. Cleaning the agglomerator The implementation of a quality agglomerator is manually performed by two operators into 20 film wastes, including poly-55 minutes of styrene, the possibility of processing is not Example 11. In a rotary sintering plant, the diameter of the 500-mm loading tank is currently wastes contaminated with adhesives of 8.2 kg of worn-out polyethylene, and recycling of the ingots themselves, films. The waste is crushed, removed from lumps and runs related to work and agglomerated. Agglomeration of interrupted waste, without any input of water. However, due to the non-use of superpower crushers, the correct determination by the operator

Claims (1)

the moment the water is introduced, the invention formula is formed, zep. Goat destroy by introduction 0 pieces of pre-shredded Method of recycling 45 mm seam waste (0.09 of the diameter of the layers in the rotary agglomerator by agglomerator) in an amount of 1.13 kg. their periodic loading into the cylindrical; however, the goat could not be broken. . Agglomerator capacity, grinding - Additional introduction of pieces in quantities, heating, compaction, agglomeration of 0.5 kg did not lead to destruction, the introduction of a disintegrating agglomerate-goat. The rotor of the agglomerator and the wedging of the agent and periodic unloading, vat. Cleaning the capacity of the agglomerator, characterized in that, by one operator lasts 30 minutes. in order to improve the quality of sinter Example 12 Into a rotary sinter, due to the destruction of a goat, a converter with a diameter of 500 mm capacity, which is contaminated after the introduction of precalcinated material, 8 kg of worn-out polyethylene agglomeration of the agent, waste is additionally introduced as a measurer. Separate material for fabricated thermoplastics in the form of runs and / or production of products from polyester glasses - 45 ingots, lumps having a linear spatula using the manual display method, size 0.1 - 0.5 times the diameter of the container and containing binder residues. In the amount of 5 - 15% of the agglomerator, the strokes are crushed, removed and the agglomeral mass of the load. Compiler L.Koltsova Editor V.Danko Tehred L.Oliynyk Proofreader O. Kravtsova Order 5659/14 Circulation 565 Subscription VNIIPI USSR State Committee for inventions and discoveries G13035, Moscow, Zh-35, Raushsk nab. 4/5 Production and printing company, Uzhgorod, st. Project, 4