Combined Reforming Apparatus for Hydrocarbon Conversion
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Solution Overview
Problem
The complexity of the steam methane reforming apparatus structure and process is increased by the need for a preliminary reformer to convert high carbon-number hydrocarbons into methane, which complicates the reforming process.
Innovation Solution
A combined reforming apparatus with two or more catalyst tubes operating at different temperatures, where the first catalyst tube converts hydrocarbons with two or more carbon atoms into methane and the second catalyst tube converts methane into synthesis gas, eliminating the need for a preliminary reformer and optimizing steam supply based on hydrocarbon content.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a preliminary reformer is added to convert high carbon-number hydrocarbons into methane, then the reforming capability is improved, but the device complexity increases
Solution Approach 1:
The patent combines the preliminary reforming function and steam methane reforming function into a single integrated reforming apparatus. The apparatus includes a reforming section with a preliminary reformer that converts high carbon-number hydrocarbons to methane, and a steam methane reforming section that converts methane to synthesis gas, all within one unified device structure. This merging eliminates the need for separate preliminary reforming equipment while maintaining full reforming capability.
2Productivity
If steam supply is increased to improve reforming efficiency, then the reforming efficiency is improved, but the energy consumption increases
Solution Approach 1:
The patent implements variable steam supply control based on the actual hydrocarbon content in the input gas. The control unit adjusts the steam supply amount dynamically according to the concentration of high carbon-number hydrocarbons detected in the gas mixture. This parameter change approach ensures optimal steam-to-hydrocarbon ratio, improving reforming efficiency while avoiding excessive energy consumption from unnecessary steam generation.
Solution Approach 2:
The system incorporates a feedback control mechanism where the steam supply is adjusted based on the measured hydrocarbon content. The control unit receives information about the hydrocarbon concentration and automatically modulates the steam supply accordingly, creating a closed-loop control system that optimizes energy usage while maintaining high reforming efficiency.
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 simplifies the reforming process, improves efficiency by reducing gas flow rate and increasing retention time, and allows for the reforming of pyrolysis gas from waste, without the need for additional equipment.
Implementation Method 1
a first catalyst tube disposed inside the body and reacting at a first temperature to reform hydrocarbons having two or more carbon atoms into methane (CH4)
Implementation Method 2
a second catalyst tube disposed inside the body, connected to the first catalyst tube, and reacting at a second temperature higher than the first temperature to reform methane (CH4) into synthesis gas comprising hydrogen (H2) and carbon monoxide (CO)
Implementation Method 3
a combustion unit configured to supply heat to the first and second catalyst tubes
Implementation Method 4
a first steam supply pipe configured to supply steam to the first catalyst tube; and a second steam supply pipe configured to supply steam to the second catalyst tube
Data Source
AI summary
A combined reforming apparatus is provided. The combined reforming apparatus includes a body, a first catalyst tube disposed inside the body and reacting at a first temperature to reform hydrocarbons (CxHy) having two or more carbon atoms into methane (CH4), a second catalyst tube disposed inside the body, connected to the first catalyst tube, and reacting at a second temperature higher than the first temperature to reform methane (CH4) into synthesis gas comprising hydrogen (H2) and carbon monoxide (CO), a combustion unit configured to supply heat to the first and second catalyst tubes, a gas supply pipe configured to supply hydrocarbon gas to the first catalyst tube, a first steam supply pipe configured to supply steam to the first catalyst tube, and a second steam supply pipe configured to supply steam to the second catalyst tube.