Gasification Melting Facility Metal Separation

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

The existing gasification melting facilities require additional devices for metal removal, increasing costs and allowing accidental metal introduction into the melting furnace due to insufficient metal separation.

Innovation Solution

A gasification melting facility with a fluidized bed gasification furnace, a vertical cyclone melting furnace, a pulverizer, and an airflow transporter that conveys pulverized incombustibles with airflow to separate metals by specific gravity, eliminating the need for separate metal removal devices.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a vibrating screen is used to remove metals from incombustibles, then metal removal is achieved, but the facility size increases and metal removal is insufficient

Engineering Contradiction:

Improvemetal removal reliabilityVSAvoidfacility size

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent replaces the mechanical vibrating screen system with a pneumatic classification system using airflow transport. Pulverized incombustibles are conveyed through an airflow transporter where metals are separated based on differences in specific gravity, eliminating the need for complex mechanical screening equipment while achieving more reliable metal removal.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent changes the separation parameter from mechanical vibration to pneumatic classification based on specific gravity. By pulverizing incombustibles to fine particles and using airflow transport, metals are separated through density differences in the air stream, providing more effective metal removal without increasing facility size.

Inventive Principle:

Principle #35Parameter changes

2Device complexity

If metals are not sufficiently removed, then facility complexity is reduced, but metals are accidentally introduced into the melting furnace

Engineering Contradiction:

Improvenumber of devicesVSAvoidmetal separation reliability

Core Design Contradiction:

Device complexityVSReliability

Solution Approach 1:

The patent replaces insufficient mechanical metal removal with a pneumatic classification system that uses airflow transport to separate metals based on specific gravity differences. This substitution provides more reliable metal separation while maintaining simple facility configuration.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent employs pneumatic principles by using an airflow transporter to convey pulverized incombustibles and separate metals through density differences in the air stream. This pneumatic classification method achieves reliable metal removal without requiring multiple complex devices.

Inventive Principle:

Principle #29Pneumatics and hydraulics

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

This configuration allows for reliable metal separation and reduced facility costs by integrating metal removal within the airflow transport system, ensuring efficient metal separation and compact facility design.

Implementation Method 1

airflow transporter that conveys the pulverized incombustibles, which are generated by the pulverizer, together with airflow, puts the pulverized incombustibles in the pyrolysis gas passage, and separates metal contained in the pulverized incombustibles by a difference in specific gravity

Methodology Applied

Scientific EffectDifference in specific gravity: Density Gradient

Implementation Method 2

fluidized bed gasification furnace that generates pyrolysis gas by thermally decomposing waste

Methodology Applied

Scientific EffectThermal decomposition: Pyrolysis

Implementation Method 3

vertical cyclone melting furnace that includes a pyrolysis gas duct through which the pyrolysis gas is introduced; the pyrolysis gas and the pulverized incombustibles are melted in the vertical cyclone melting furnace

Methodology Applied

Scientific EffectHigh temperature combustion: Combustion

Data Source

PatentUS10047953B2Gasification melting facility

Publication Date: 2018.08.14 MITSUBISHI HEAVY IND ENVIRONMENTAL & CHEM ENG CO LTD

AI summary

This gasification melting facility includes: a fluidized bed gasification furnace that generates pyrolysis gas by thermally decomposing waste and discharges incombustibles; a vertical cyclone melting furnace that includes a pyrolysis gas duct through which the pyrolysis gas is introduced; a pyrolysis gas passage that connects the fluidized bed gasification furnace with the pyrolysis gas duct of the vertical cyclone melting furnace; pulverizer that pulverize the incombustibles into pulverized incombustibles so that the particle size of the incombustibles becomes fine; and airflow transporter that puts the pulverized incombustibles in the pyrolysis gas passage, and separating metal contained in the pulverized incombustibles by a difference in specific gravity while conveying the pulverized incombustibles together with airflow. The pyrolysis gas and the pulverized incombustibles are melted in the vertical cyclone melting furnace.