Moving Packed Bed Heating Stages for Energy-Efficient Pyrolysis
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional hydrocarbon pyrolysis systems operating at high temperatures face challenges in recovering energy efficiently, leading to high costs that make them economically unviable.
Innovation Solution
Implementing a moving packed bed processing plant with medium temperature heating and superheating sections to optimize energy use, utilizing a reactor with a particle preheating, high temperature, and superheating sections to manage energy transfer efficiently, producing gas and solid products.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional hydrocarbon pyrolysis systems operate at high temperatures (1,000-2,000 Celsius), then the reaction proceeds efficiently, but the energy recovery becomes difficult and costs increase making the system economically unviable
Solution Approach 1:
The system is divided into multiple functional sections: a preheating section where particles are heated to intermediate temperatures, and a superheating section where particles are heated to reaction temperatures. This segmentation allows energy to be added in controlled stages, improving overall energy efficiency while maintaining high reaction temperatures where needed.
Solution Approach 2:
Particles undergo preliminary preheating in the preheating section before entering the superheating section. This preliminary action reduces the energy burden on the superheating section and enables more efficient energy recovery by capturing heat from product gases at intermediate temperature levels before final reaction occurs.
2Speed
If high temperatures are maintained in conventional pyrolysis systems, then decomposition reactions proceed rapidly, but the cost of providing such high temperature increases making the system economical
Solution Approach 1:
The system changes temperature parameters through staged heating: particles are first heated to intermediate temperatures in the preheating section, then to high reaction temperatures in the superheating section. This parameter change approach allows rapid decomposition to occur only where necessary while reducing overall energy costs through efficient heat recovery at intermediate temperature levels.
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 reduces energy costs and CO2 footprint, enables easier handling of large solid carbon particles, and allows for energy storage, making the process more economical and efficient.
Implementation Method 1
a particle preheating section configured to preheat particles of the moving packed bed of particles
Implementation Method 2
a superheating section configured to heat the at least one of gases or particles received from the medium temperature heating section to a second defined temperature
Implementation Method 3
The high temperature section of the reactor utilizes the at least one of gases or particles received from the superheating section to transfer energy to the received particles of the moving packed bed of particles
Implementation Method 4
to provide heat transfer between the particles of the moving packed bed of particles and the feed gas such that a reaction occurs that generates a gaseous product and a solid product
Implementation Method 5
Conventional hydrocarbon pyrolysis systems often operate at high temperatures such as 1,000-2,000 Celsius
Data Source
Figure 1
Figure 2
AI summary
A moving packed bed processing plant using medium temperature heating and superheating of process materials to produce gas and solid products is disclosed. A system may include a reactor, a medium temperature heating section, and a superheating temperature section. A particle preheating section of the reactor preheats a moving packed bed of particles; a high temperature section of the reactor transfers energy to the preheated particles; and a decomposition and reaction section provides heat transfer between the moving packed bed of particles and a feed gas such that a reaction occurs that generates a gaseous product and a solid product. The medium temperature heating section heats gases or particles utilizing gaseous product obtained from the reactor and the superheating section further heats the gases or particles from the medium temperature heating section and provides the superheated gases or particles to the high temperature section of the reactor.