Decomposition of waste plastics

a technology of waste plastics and decomposition methods, applied in the field of decomposition of waste plastics, can solve the problems of low conductivity coefficient of typical waste plastics, low heating efficiency of reactors, and low heating efficiency, and achieve the effects of enhancing the emission of far infrared radiation, high heating efficiency, and high resistance to high temperature, high pressure and corrosion

Inactive Publication Date: 2012-08-30
ENVION INC
View PDF6 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0004]Various metal oxides, nitrides, carbides and borides are far infrared radiators, and emit far infrared radiation of different wavelengths when heated, and the wavelength is different at different temperatures. It is thus possible to get high heating efficiency by selecting the wavelength of the far infrared radiation within desired ranges by selecting the appropriate far infrared ray radiator and working temperature. The “FIR” heater can composite electrical resistance space, far infrared radiator, insulator, and protective shell. The protective shell contains an isolation device that is made of metal, for example, iron or stainless. The isolation device, which separates the heater from the stream in the reactor, is preferably resistant to high temperature, high pressure and corrosion. In order to enhance the emitting of the far infrared radiation, a layer of the far infrared radiator may cover the outer surface of the far infrared ray heater. The far infrared ray radiator can be made into various shapes, for example, rod-shape, band-shape and other shape

Problems solved by technology

First the heating efficiency of the reactors is not high.
Because the heat is not directly transferred to the plastics, the heating efficiency is low.
Nevertheless, despite the low heat-conducting efficiency there are serious problems from coking on the inner wall of the reactor.
Be

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Decomposition of waste plastics
  • Decomposition of waste plastics
  • Decomposition of waste plastics

Examples

Experimental program
Comparison scheme
Effect test

example 2

[0028]In this experiment, 170.5 / g of waste plastic from weaving bags made from polypropylene (PP) are put into the reactor for cracking. The temperature in the bottom of the reactor quickly increases and the top temperature rises to 57° C. The condensed oil begins to flow out of the condenser. After 10 minutes as the bottom temperature climbs and the top temperature reaches 146° C., oil continues to flow and gas is produced and ignited as in example 1. The molten plastic liquid continues to flow and gas is produced and ignited as in example 1. The molten plastic liquid continues to be cracked and as the upper temperature reaches 251° C., fuel oil and gas continue to flow at a rapid pace out of the top of the reactor for 25 minutes. Distillate oil obtained is 118.0 / g with a yield of 69.2% while the gas and loss is about 34.0 / g or 19.44% and the coke in this run, which also contains oil, is 18.5 / g or 10.85%.

ActionWeight / g%Fuel out of top of11869.2reactor*Cracking gas & loss34.019.44Co...

example 3

[0029]In this experiment, 47.5 / g of waste plastic food bags made from polyethylene (PE) is put into the reactor for cracking. The temperature in the bottom of the reactor is slowly increased to 200° C. and the bags begin to liquefy. The condensed oil begins to flow out of the condenser. As the bottom temperature climbs and the top temperature reaches 180° C. for 15 minutes and is maintained this temperature for 1 hour, oil is produced. Distillate oil obtained is 42.6 / g with a yield of 89.68% while the gas and loss is about 3.4 / g or 7.16% and the coke in this run is 1.5 / g or 3.16%. No residual heavy oil is obtained in this experiment.

ActionWeight / g%Fuel oil out of top of42.689.68reactor*Cracking gas & loss3.47.16Coke1.53.16*HQ Fuel oil yield total42.689.68Total w / debris47.5100

example 4

[0030]In this experiment, 314.9 / g of waste plastic from a white plastic barrel is put into the reactor for cracking. The reactor is heated for 25 minutes at which time a white gas like fog flows out of the reactor. The bottom temperature climbs to 208° C. and the top temperature reaches 56° C.; the plastic is fully liquefied at 330° C. at the bottom side of the reactor. The molten plastic liquid continues to be cracked and as the upper temperature reaches 120° C., fuel oil and gas continue to flow at a rapid pace out of the top of the reactor for 20 minutes at which time the cracking reaction finished. Distillate oil containing wax is 207.5 / g with a yield of 66.0% and the residual oil is 87.5 / g or 27.8%.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
Temperatureaaaaaaaaaa
Percent by massaaaaaaaaaa
Fractionaaaaaaaaaa
Login to view more

Abstract

Far infrared ray heating technology is used to breakdown waste plastic and resultant heavy oils into usable products. Waste plastics may thus be processed into petroleum products and used to generate energy.

Description

SUMMARY OF THE INVENTION[0001]Conventional reactors for converting waste plastics into oil, for example, as disclosed in U.S. Pat. Nos. 5,947,721, 5,951,826 and 5,584,969, all use high temperature flue gas to supply the heat required to decompose the plastics into oil. The reactors and processes therein involve some disadvantages. First the heating efficiency of the reactors is not high. The high temperature flue gas transfers the heat to the outer surface of the reactor, and then the outer surface conducts the heat to the plastics in the reactor. Because the heat is not directly transferred to the plastics, the heating efficiency is low. Nevertheless, despite the low heat-conducting efficiency there are serious problems from coking on the inner wall of the reactor. The decomposition of oil usually applies pyrrolysis conditions cure heavy oil to light oil, increasing the efficiency of the light oil. Thus, pyrrolysis is one desirable waste plastic and waste oil reclamation method, as...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C10B23/00
CPCC08J11/10C08J11/12C10G1/10C10G53/04C10L1/08C10G2400/04F23G5/46F23G7/12C10G2300/1003C10G2300/202C10G2300/44F23G5/0276Y02W30/62
Inventor MA, MYUNG DUCK
Owner ENVION INC
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap