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A method and device for efficient utilization of all components of chlorine-containing plastic waste

A waste and resource recycling technology, applied in the field of solid waste resource utilization, can solve the problems of small demand for hydrochloric acid, low price, and environmental pollution

Inactive Publication Date: 2011-12-07
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the past, hydrochloric acid was made into hydrochloric acid for sale or neutralized with lye and then discharged, but the demand for hydrochloric acid is small and the price is low, and the discharge not only causes a large waste of chlorine resources, but also pollutes the environment

Method used

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  • A method and device for efficient utilization of all components of chlorine-containing plastic waste
  • A method and device for efficient utilization of all components of chlorine-containing plastic waste

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Monolithic catalyst preparation:

[0040] (1) 12.4g RuCl 3 ·3H 2 Dissolve O in 96mL of ethylene glycol, add 5.4g of SBA-15, then slowly heat to 140°C, and dropwise add 220mL of 1mol L -1 K 2 CO 3 The aqueous solution was stirred with nitrogen for 5h, transferred to an autoclave at 100°C, crystallized for 10h, filtered, dried, and calcined at 260°C to obtain about 7.7g of 10% RuO 2 / SBA-15;

[0041] (2) RuO 2 / SBA-15 is ground into powder, adding γ-Al 2 o 3 Sol (containing γ-Al 2 o 3 about 6g) and 10mL 1mol L -1 HNO 3 , with magnetic stirring for 5h, the RuO 2 Content is the active slurry of 5wt%;

[0042] (3) Dip the treated FeCrAl alloy into γ-Al 2 o 3 Sol (containing γ-Al 2 o 3 About 6g), after 5 minutes, it rises vertically slowly, blows off the excess sol with air, rotates and dries horizontally, bakes at 500°C for 2 hours, and repeats the operation steps three times to obtain γ-Al 2 o 3 The content is about 8wt% coated with γ-Al 2 o 3 FeCrAl al...

Embodiment 2

[0045] The RuCl in the embodiment 1 monolithic catalyst preparation step (1) 3 ·3H 2 O is replaced by CuCl with the same number of moles 2 Solution, the temperature of the autoclave is changed to 140°C, the crystallization time is changed to 12h, the roasting temperature is changed to 320°C, and SBA-15 is replaced by rutile TiO in step (2). 2 , the calcination temperature in step (3) is changed to 600°C, and other conditions remain unchanged, CuO / TiO2 / FeCrAl. It is placed in a fixed bed as a monolithic catalyst. The chlorine-containing plastic waste is a mixture of PVC, PP and PE, wherein the mass percentage of PVC is 30%, the temperature of the cracking fluidized bed is kept at 300°C, the temperature of the integral catalyst fixed bed is kept at 190°C, and the cracking fluidized bed It is in communication with the monolithic catalyst fixed bed. After 20 minutes, cut off the connection between the two beds, raise the temperature of the cracking fluidized bed to 450°C, and...

Embodiment 3

[0047] The autoclave temperature in the monolithic catalyst preparation step (1) of Example 1 was changed to 140°C, the crystallization time was changed to 12h, the roasting temperature was changed to 320°C, and SBA-15 was replaced by MCM-41 in step (2), The calcination temperature in step (3) is changed to 600°C, the FeCrAl alloy is replaced by cordierite, and other conditions remain unchanged, and RuO 2 / MCM-41 / cordierite. Chlorine-containing plastic waste is a mixture of PVC, PP and PE, wherein the mass percentage of PVC is 50%, the temperature of the cracking fluidized bed is kept at 300°C, the temperature of the monolithic catalyst fixed bed is kept at 200°C, and the cracking fluidized bed It is in communication with the monolithic catalyst fixed bed. After 20 minutes, cut off the connection between the two beds, raise the temperature of the cracking fluidized bed to 460°C, and crack other components in the plastic. Raise the temperature of the monolithic catalyst fixed...

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Abstract

The invention discloses a method and a device for efficient resource utilization of chlorine-containing plastic waste, which belong to the technical field of resource utilization of solid waste. Coupling the two processes of pyrolysis of chlorine-containing plastic waste to fuel oil and high value-added conversion of HCl generated by pyrolysis, so as to achieve the goal of efficient resource utilization of all components of chlorine-containing waste, and process chlorine-containing plastic in a fluidized bed cracking The HCl of the waste is removed by heat and further thermally cracked, while the capture and catalytic conversion of HCl to chlorine is carried out in the fixed bed of the monolithic catalyst. The catalytic tower is catalytically upgraded to obtain chlorine-free fuel. The invention can obtain chlorine-free high-quality fuel oil, and at the same time, the contained chlorine elements can be converted with high added value, thereby realizing efficient multi-component resource utilization of PVC chlorine-containing wastes.

Description

technical field [0001] The invention belongs to the technical field of resource utilization of solid waste, and in particular relates to a method and a device for efficient resource utilization of chlorine-containing plastic waste to obtain liquid fuel from chlorine-containing plastic waste while converting high-value chlorine elements. Background technique [0002] The amount of domestic waste in China is huge. In more developed cities, waste plastics account for 8% to 15% of the total mass of waste, and the volume fraction reaches about 30%. A large amount of plastic waste not only causes serious environmental pollution, but also leads to a great waste of resources. Pyrolysis of waste plastics into liquid fuels is one of the most promising methods for recycling waste plastics. [0003] Chlorine-containing plastics are an important component of plastic waste, among which PVC is one of the five general-purpose plastics, with a huge amount of waste. There are 58.5% chlorine...

Claims

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Application Information

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IPC IPC(8): C10G1/00C01C1/16C01B7/04C08J11/10B09B3/00
CPCY02W30/62
Inventor 吴玉龙陈宇杨明德史雪君党杰陈镇胡湖生刘吉
Owner TSINGHUA UNIV
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