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Delayed coking treatment method for waste plastics and treatment device thereof

A technology of delayed coking and waste plastics, applied in plastic recycling, preparation of liquid hydrocarbon mixture, petroleum industry, etc., can solve the problems of small application range, high input cost, complicated process, etc., to reduce secondary pollution and low input cost , The effect of simple process

Inactive Publication Date: 2008-07-30
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The biggest limitation of this treatment method is that its application range is relatively small, and the effect is generally better under small-scale operations, and catalysts are used, the process is relatively complicated, and the relative cost of investment is relatively high.

Method used

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  • Delayed coking treatment method for waste plastics and treatment device thereof
  • Delayed coking treatment method for waste plastics and treatment device thereof
  • Delayed coking treatment method for waste plastics and treatment device thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] The raw material is waste plastic (PE), crushed to less than 0.5mm, and preheated to 300°C after removing impurities. Then the temperature is rapidly raised to 500°C in the heating furnace. The product yields obtained after reaction and fractionation are shown in Table 1.

[0044] Table 1 waste plastics delayed coking product yield (wt%)

[0045] raw material

liquid product yield

Solid product yield

gas product yield

waste plastic

90.8％

0.67％

8.95％

[0046] Referring to the chromatographic analysis method of biomass tar, n-hexane, benzene, and absolute ethanol are used in sequence to elute the aliphatic hydrocarbons, aromatic hydrocarbons, and polar components in the liquid product, drive off the solvent, and weigh. Obtain the content of each component in the sample, and use the difference method to obtain the asphaltene content. The results are shown in Table 2. It can be seen that most of the plastic tar is ali...

Embodiment 2

[0054] The raw material is 10% pretreated waste plastic (PE) mixed with 90% residual oil (vacuum residual oil from Shanghai Petrochemical 1 million tons / year delayed coking unit, the composition is 60% sand light oil + 40% Oman oil ), the mixture was preheated to 200°C and then rapidly heated to 500°C in the heating furnace. After a reaction time of 2 to 3 hours, the product yields obtained are shown in Table 4.

[0055] Table 4 Waste Plastics Mixed Residue Delayed Coking Product Yield (wt%)

[0056] raw material

liquid product yield

Solid product yield

gas product yield

waste plastic

66.45

21.04

12.51

[0057] Adopt the same experimental analysis method as Example 1 to carry out the distillation range analysis of liquid product. The results are shown in Table 5 below and image 3 .

[0058] Table 5 Tar fraction content / % of co-refined plastics and residual oil

[0059]

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Abstract

The invention provides a delayed coking treatment method of the waste plastic and the treatment device, which relates to the plastic recycling technology field. The invention aims at solving the technology problems of waste PE-polyethylene, PS-polystyrene and PP-polypropylene plastic recycling. The treatment method includes the steps of 1) the smash and purification treatments on the waste plastic; 2) heating and compressing the waste plastic into fluid or semi-fluid state; 3) sending the waste plastic into a high-temperature (290-320 DEG C) for storage; 4) heating the waste plastic (the heating speed is 80-100 DEG C per minute) to 495-505 DEG C in a heating furnace; 5) sending the waste plastic into a coke tower for reaction, and the sending the waste plastic into a fractionation tower for separating available products from the plastic by fractionation. The treatment device includes a waste plastic hopper; and a plastic connecting muller, an impurity removing device, a heating extrusion conveyor, a high-temperature storage tank, a heating furnace and a coke tower which are orderly connected behind the waste plastic hopper. The invention has the advantages that the present equipment can be efficiently utilized, the oiling cost of the waste plastic is lowered, the process is simple, the invested cost is low, and the economic benefit is high.

Description

technical field [0001] The invention relates to the recycling technology of waste plastics, in particular to a delayed coking treatment technology of waste plastics which can utilize the existing delayed coking process and its equipment. Background technique [0002] Plastic is a kind of artificial polymer synthetic polymer, which is a relatively new type of industrial material. Together with steel, wood and cement, plastics constitute the four basic materials of modern industry. Play an important role in the national economy. Because of its light weight, corrosion resistance, high strength, easy processing and molding, beautiful appearance, bright color and other advantages, as well as energy saving in production and use, it is widely used in industry, agriculture and people's daily life. [0003] While plastic brings convenience and benefits to people's life and production, it also produces a lot of pollution. Statistics show that about 70% to 80% of the general-purpose...

Claims

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Application Information

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IPC IPC(8): C10G1/00C08J11/10
CPCY02W30/62
Inventor 汪华林张振华陈于勤胥培军
Owner EAST CHINA UNIV OF SCI & TECH
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