Exhaust Gas Treatment Double-Pipe Structure Purge Gas Isolation
Solution Overview
Problem
Existing exhaust gas treatment apparatuses face challenges in preventing the adverse effects of processing gases, such as corrosion and clogging, due to reactions between the gases and water or metal interfaces.
Innovation Solution
The apparatus employs a double-pipe structure with a gas treatment reactor and a liquid-film forming device, which forms a liquid film on the inner cylinder to prevent gas-liquid interface contact and uses a purge-gas introducing device to replace the atmosphere around the liquid film with a purge gas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a water film is formed on the inner wall surface to prevent corrosion and wash away by-products, then the inner wall surface is protected, but solids may grow and clog the combustion chamber when the processing gas reacts with water at the gas-liquid interface
Solution Approach 1:
The invention extracts the harmful gas-liquid interface from the system by introducing a purge gas between the processing gas and the water film, removing the interface where solid generation occurs while preserving the protective water film function
Solution Approach 2:
A purge gas is introduced as an intermediary substance between the processing gas and the water film, preventing direct contact between the processing gas and water, thus eliminating solid generation while maintaining the water film's protective function
2Productivity
If the flow rate of the purge gas is increased to prevent processing gas from reacting with water, then solid generation is reduced, but the water film may be splashed and react with processing gas, generating solids
Solution Approach 1:
The invention optimizes the flow rate parameter of the purge gas to achieve a balance where it is sufficient to prevent processing gas contact with water but not excessive to cause water film splash, thereby eliminating solid generation without compromising system stability
3Productivity
If the processing gas flows intensely in the combustion treatment chamber, then the treatment efficiency is improved, but the water film is splashed and reacts with processing gas, generating solids
Solution Approach 1:
The purge gas serves as a protective intermediary layer between the intensely flowing processing gas and the water film, allowing high-velocity processing gas flow for efficient treatment while preventing water film splash and solid generation
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 effectively prevents damage to the gas-liquid interface, reduces the risk of solid generation, and enhances the safety and reliability of the exhaust gas treatment process by minimizing corrosion and gas leakage.
Implementation Method 1
a liquid-film forming device configured to form a liquid film on the inner cylinder
Implementation Method 2
a purge-gas introducing device configured to introduce a purge gas into an inner gap between the inner cylinder and the flow-path forming wall
Data Source
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AI summary
An exhaust gas treatment apparatus capable of eliminating an adverse effect of a processing gas is disclosed. The exhaust gas treatment apparatus includes a gas treatment reactor having a flow-path forming wall (12), and a double-pipe structure (20). The double-pipe structure (20) includes an inner cylinder (21) into which at least a part of the flow-path forming wall (12) is inserted, and an outer cylinder (22) disposed outside the inner cylinder (21).