Carbon Black Reflux Reactor for Continuous Activation
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Solution Overview
Problem
The existing carbon black preparation methods face challenges in achieving mass production due to long process times and reduced uniformity and yield, as they require separate reforming reactors and involve steam injection that can prematurely terminate the carbon black formation reaction, making it difficult to produce carbon black with high specific surface area and uniform physical properties.
Innovation Solution
A carbon black preparation apparatus and method where carbon black formed in a combustion reactor is converted into slurry and refluxed back into the reactor for continuous reforming treatment, eliminating the need for a separate reforming reactor and ensuring sufficient residence time for activation, thereby improving specific surface area and uniformity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If steam is injected into the combustion reactor to activate carbon black, then the specific surface area of carbon black is increased, but the carbon black formation reaction is prematurely terminated and yield is reduced
Solution Approach 1:
The combustion reactor is divided into multiple reaction zones along the flow direction: a first reaction zone for carbon black formation, a second reaction zone for activation, and a third reaction zone for quenching. This spatial segmentation allows carbon black formation and activation to occur separately in different zones, preventing premature termination of the formation reaction while still achieving the desired specific surface area enhancement through controlled activation in the second zone.
2Area of stationary object
If a separate reforming reactor is used for carbon black activation, then the specific surface area is increased, but the process time is extended and mass production is not achievable
Solution Approach 1:
The patent merges the carbon black formation process and the activation process into a single combustion reactor by creating distinct reaction zones within it. The first zone performs formation, the second zone performs activation, and the third zone performs quenching. This integration eliminates the need for separate transfer operations between reactors and enables continuous processing, thereby reducing process time and enabling mass production while still achieving the desired specific surface area enhancement.
3Area of stationary object
If carbon black is transferred to a separate reactor for reforming, then activation can be performed, but the uniformity of the resulting carbon black is reduced and additional processing steps are required
Solution Approach 1:
The combustion reactor is divided into multiple reaction zones along the flow direction: a first reaction zone for carbon black formation, a second reaction zone for activation, and a third reaction zone for quenching. This spatial segmentation allows carbon black formation and activation to occur separately in different zones, preventing premature termination of the formation reaction while still achieving the desired specific surface area enhancement through controlled activation in the second zone.
Solution Approach 2:
The patent establishes a continuous flow process where carbon black moves sequentially through the first reaction zone for formation, then directly into the second reaction zone for activation, and finally into the third reaction zone for quenching. This continuous action without interruption or transfer maintains uniformity of carbon black properties while achieving the desired activation level, as the material undergoes consistent treatment throughout the process.
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 approach allows for continuous reforming of carbon black within a single combustion reactor, enhancing the specific surface area and physical properties of the carbon black, improving yield and uniformity, and reducing the need for additional processing steps.
Implementation Method 1
a first reaction region configured to receive and react fuel oil, feedstock oil and combustion-accelerating gas with each other
Implementation Method 2
form carbon black powders
Implementation Method 3
a second reaction region located downstream of the first reaction region, wherein the second reaction region is configured to receive the carbon black slurry formed in the mixer and to activate carbon black powders in the carbon black slurry
Implementation Method 4
a third reaction region located downstream of the second reaction region, wherein the third reaction region is configured to receive the activated carbon black powders and to eject a quenching liquid onto the activated carbon black powders
Data Source
AI summary
Disclosed are apparatus and method for preparing carbon black, in which the carbon black may be continuously formed and activated. In one embodiment, carbon black powders formed in a combustion reactor are converted into a slurry which in turn is refluxed to the combustion reactor in a repeated manner, thereby to allow successive activation treatments. In this way, a sufficient residence time for the activation of the carbon black may be secured.