Retort Chamber Thermal Depolymerization Desulfurization
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing methods for thermally de-manufacturing rubber and plastic products, such as tires, often require added calcium salts for sulfur reaction and may not effectively desulfurize within the retort chamber, posing environmental concerns due to harmful gas emissions.
Innovation Solution
A vertically oriented retort chamber with multiple temperature zones and controlled oxygen and water input for partial combustion, allowing for thermal depolymerization and desulfurization without added calcium salts, using a burner and catalysts to manage heat and reactions, and a cyclone separator for particulate removal, with optional desulfurization and product separation units.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of substance
If calcium salts are added to react with sulfur during thermal depolymerization, then sulfur can be removed from the rubber, but the process complexity increases and additional material handling is required
Solution Approach 1:
The patent applies the self-service principle by enabling the retort chamber to perform desulfurization inherently through controlled partial combustion and temperature zoning, without requiring external calcium salts or additional desulfurization agents. The system uses its own thermal processing capability to convert sulfur into removable gaseous forms, making the retort chamber self-sufficient for both depolymerization and desulfurization functions.
Solution Approach 2:
The patent extracts the sulfur removal function from the thermal depolymerization process by implementing a separate desulfurization zone within the retort chamber. This zone specifically targets sulfur compounds through controlled combustion conditions, separating the sulfur removal mechanism from the main depolymerization reaction, thereby eliminating the need for calcium salts while maintaining process efficiency.
2Device complexity
If thermal depolymerization is performed without desulfurization, then the process is simpler, but harmful sulfur gases are emitted into the environment
Solution Approach 1:
The patent segments the retort chamber into multiple temperature zones, with a specific desulfurization zone dedicated to sulfur compound removal. This segmentation allows the system to maintain overall process simplicity while incorporating targeted sulfur treatment in a specific region, converting harmful sulfur gases into manageable byproducts through controlled partial combustion conditions in that zone.
Solution Approach 2:
The patent converts harmful sulfur gases into beneficial or manageable substances by implementing controlled partial combustion in the desulfurization zone. Sulfur compounds that would otherwise be emitted as harmful gases are transformed into sulfur dioxide and other convertible forms that can be further processed or removed, turning an environmental hazard into a controllable intermediate product.
3Object-generated harmful factors
If multiple temperature zones are implemented for desulfurization, then sulfur emissions are reduced, but the retort chamber complexity increases
Solution Approach 1:
The patent merges the desulfurization function with the existing thermal depolymerization retort chamber structure by creating temperature zones within the same chamber. Rather than adding separate desulfurization equipment, the system integrates sulfur removal capabilities into the thermal processing zones, combining depolymerization and desulfurization in a single unified apparatus with differentiated temperature regions.
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 method efficiently isolates organic and inorganic materials, including sulfur compounds, producing valuable products like carbon black, olefinic fractions, and gases, while minimizing sulfur emissions and allowing for further processing of the products, thus addressing environmental concerns and improving recycling efficiency.
Implementation Method 1
The retort chamber is heated to a temperature sufficient to thermally depolymerize polymeric materials and combust non-polymeric materials
Implementation Method 2
combust non-polymeric materials
Implementation Method 3
The apparatus further includes a phase separator to separate the gaseous products into liquid and gas phases
Data Source
Figure 1
Figure 2
Figure 3
AI summary
An apparatus and process for thermally de-manufacturing tires and other materials. The apparatus is a retort chamber with various zones in which tires are combusted to provide energy for the thermal depolymerization reaction, depolymerization takes place, and products leave the retort chamber. In one embodiment, the process reacts water with iron present in steel-belted tires to produce hydrogen, which helps to break sulfur-sulfur bonds in vulcanized materials. The water also helps control the temperature of the reaction, which allows for control over the types and relative amounts of the various depolymerization products.