Carbon Black Production Extender Fluid Momentum Control
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Solution Overview
Problem
Carbon black production is disrupted by the need to change process controls and nozzle configurations when shifting between different grades or feedstocks, leading to costly shutdowns and inefficiencies, especially with feedstocks containing high particulates like ash, which can cause nozzle tip wear and plugging.
Innovation Solution
Introducing a heated gas stream and combining it with a carbon black feedstock using an extender fluid to form a fluid-feedstock mixture that increases momentum and controls particle properties without requiring nozzle changes or reactor shutdowns, allowing for continuous production even with challenging feedstocks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If process controls and nozzle configurations are changed to manufacture different grades of carbon black or accommodate different feedstocks, then particle properties can be adjusted, but the reactor must be shut down and nozzles replaced, causing time-consuming and costly disruptions
Solution Approach 1:
The patent changes physical parameters of the feedstock (temperature, pressure, velocity) rather than changing nozzle configurations. By heating feedstock to 300-850°C and controlling its velocity (0.2-10 m/sec), the process can produce different carbon black grades while maintaining continuous reactor operation, eliminating the need for shutdowns and nozzle replacements
Solution Approach 2:
The feedstock is pre-heated and pre-processed before entering the reactor to establish optimal conditions for carbon black formation. This preliminary heating and velocity control allows the reactor to operate continuously at steady state while producing different grades by adjusting feedstock parameters rather than changing reactor configuration
2Manufacturing precision
If smaller nozzle tip sizes are used for feedstock introduction points, then better control of jet dynamics can be achieved, but nozzle tip wear and plugging from particulates becomes more problematic
Solution Approach 1:
The patent changes the temperature parameter of the feedstock (heating to 300-850°C) which reduces its viscosity and improves flow characteristics. This allows smaller nozzle tips to be used for better jet dynamics control while the heated state prevents particulates from causing plugging, and the reduced viscosity decreases wear on nozzle tips
Solution Approach 2:
The feedstock is pre-heated before introduction to counteract the potential harm of particulate accumulation and coking that would normally cause nozzle plugging. By heating the feedstock in advance, the process prevents these harmful effects before they can damage the nozzle tips
3Productivity
If feedstock pre-heat temperatures are increased to improve carbon black properties, then economic efficiency improves, but thermally induced fouling of feedstock lines increases
Solution Approach 1:
The feedstock is heated quickly through a controlled process before it can undergo thermal cracking or coking that causes fouling. By establishing optimal velocity (0.2-10 m/sec) and temperature (300-850°C) conditions preliminarily, the feedstock passes through the heating zone rapidly enough to benefit from pre-heating without remaining long enough to form fouling deposits
Solution Approach 2:
The feedstock is moved through the high-temperature zone rapidly by controlling its velocity, allowing it to skip through the temperature range where fouling occurs. This rapid passage enables the economic benefits of high-temperature pre-heating while minimizing residence time that would otherwise cause thermal fouling of feedstock lines
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
Enables continuous carbon black production with controlled particle properties and reduced fouling, increasing yield and avoiding nozzle plugging issues, while maintaining efficiency and reducing operational costs.
Implementation Method 1
the at least one extender fluid increases the momentum of the at least one carbon black feedstock in a direction that is substantially axial
Implementation Method 2
The fluid-feedstock mixture is supplied to at least one feedstock introduction point to the carbon black reactor... the at least one extender fluid increases the momentum of the at least one carbon black feedstock
Data Source
AI summary
Methods for the production of carbon black using an extender fluid(s) are provided as well as methods to control one or more particle properties of carbon black utilizing extender fluids and other techniques.