Separator for Solid Particles from Vapour-Gas Mixture
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Solution Overview
Problem
Existing separators for solid particles from vapour-gas mixtures face issues with refractory lining wear, condensation, and reduced separation efficiency due to temperature differences and corrosive elements, leading to frequent maintenance and reduced plant availability.
Innovation Solution
The implementation of an external insulation and electrical trace heating system to maintain metal surfaces at or above the vapour-gas mixture temperature, combined with a screw conveyor unit to minimize dust retention and break the fine dust circuit, ensuring an air-tight and efficient separation process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If refractory lining is used to protect the dust chamber walls, then resistance to abrasive particles and corrosive elements is improved, but temperature differences cause condensation of vapour-gas mixture on the metal surface, leading to material buildup and reduced separation efficiency
Solution Approach 1:
The refractory lining is removed from the dust chamber design. Instead of using refractory material between the metal wall and the vapour-gas mixture, the patent uses a cold wall design where the metal wall directly contacts the vapour-gas mixture, eliminating the source of condensation problems while maintaining protection through proper material selection and temperature management
Solution Approach 2:
The wall temperature is maintained above the dew point temperature of the vapour-gas mixture by controlling the metal wall temperature parameter. This ensures that condensation does not occur on the wall surface, preventing material buildup and maintaining separation efficiency throughout operation
2Reliability
If refractory lining is used to maintain wall temperature above dew point, then condensation is prevented, but the refractory material wears due to porosity and heat cycles, requiring frequent maintenance shutdowns
Solution Approach 1:
The refractory lining is completely removed from the system. The patent replaces the refractory layer with a cold wall design where the metal wall temperature is controlled to remain above the dew point, eliminating the wear and maintenance issues associated with refractory materials while maintaining condensation prevention
Solution Approach 2:
The mechanical/refractory protection system is replaced with a thermal control system. Instead of relying on refractory material properties to prevent condensation, the patent uses active temperature control of the metal wall to maintain it above the dew point, replacing a passive mechanical solution with an active thermal management approach
3Quantity of substance
If fine semi-coke particles are discharged to the lower part of the dust chamber, then separation from vapour-gas mixture is achieved, but particles are re-entrained into the vapour-gas stream, decreasing overall separation efficiency
Solution Approach 1:
The discharge of fine particles to the lower part of the dust chamber is eliminated. Instead, the patent directs the separated fine semi-coke particles directly to the screw conveyor through a separate discharge path, preventing their re-entrainment into the vapour-gas stream and maintaining high separation efficiency
Solution Approach 2:
A separate discharge mechanism is introduced as an intermediary between the cyclone separation stage and the final particle removal. This intermediate discharge path allows fine particles to be efficiently removed without contacting the vapour-gas mixture in the lower chamber, preventing re-entrainment while maintaining separation effectiveness
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 solution enhances separation efficiency, reduces maintenance needs, and maintains system reliability by preventing condensation and refractory damage, allowing for longer operation campaigns without shutdowns.
Implementation Method 1
The implementation of an external insulation and electrical trace heating system to maintain metal surfaces at or above the vapour-gas mixture temperature
Implementation Method 2
The implementation of an external insulation and electrical trace heating system to maintain metal surfaces at or above the vapour-gas mixture temperature
Implementation Method 3
an upper part of the main body is connected to an inlet of a cyclone for removal of fine semi-coke particles from the vapour-gas mixture
Implementation Method 4
A screw conveyor unit is connected to a bottom part of the main body
Data Source
AI summary
A separator for separating solid particles from a vapor-gas mixture includes a dust chamber with a main body having an inlet for a vapor-gas mixture containing semi-coke particles and an outlet chute in a bottom of the main body for removal of semi-coke particles. The main body is covered with an external insulation. The separator also includes a cyclone, wherein an upper part of the main body is connected to an inlet of the cyclone for removal of fine semi-coke particles from the vapor-gas mixture. A screw conveyor unit is connected to a bottom part of the main body.