Wet Stack Guide Vane Condensate Collector Design
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In wet stack systems, the re-entrainment of condensate droplets into the flue gas flow remains a challenge, leading to reduced droplet removal efficiency and the phenomenon of 'spitting' due to improper design configurations and existing guide vane designs that do not effectively manage the flow and collection of condensate.
Innovation Solution
A guide vane with a condensate collector featuring an enclosure with a non-linear flow path and a gutter for collecting droplets, where the pressure difference between the front and back streams forces flue gas into the collector, ensuring droplets hit the walls and are collected, and the design includes offset sections and U-turns to prevent carry-over and enhance drainage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If guide vanes are provided for deflecting flue gas in a wet stack, then the flue gas flow is directed properly, but condensate droplets may be re-entrained by the flow and discharged from the stack top causing spitting
Solution Approach 1:
The guide vane is divided into multiple sections: a front guiding face for flow direction control, a rear face, and an integrated condensate collector with enclosure and gutter. This segmentation allows the single component to simultaneously achieve flow deflection and droplet collection functions, preventing re-entrainment while maintaining operational effectiveness.
Solution Approach 2:
The condensate collector is merged with the guide vane structure itself, forming an integrated component. The collector includes an enclosure with inlet and outlet for flue gas, and a gutter for collecting condensate. This merging ensures that condensate is collected and drained effectively while the guide vane continues to deflect flue gas, eliminating the harmful spitting effect.
2Reliability
If condensate collectors are designed to collect liquid droplets from flue gas, then droplet removal efficiency is improved, but complex design configurations may lead to improper functioning and unacceptable liquid discharge
Solution Approach 1:
The guide vane is designed to perform multiple functions simultaneously: deflecting flue gas flow in the desired direction and collecting condensate droplets. The integrated condensate collector with its enclosure and gutter system provides a multi-functional solution that maintains reliability for droplet removal while avoiding excessive complexity by combining functions in a single unified structure.
3Object-generated harmful factors
If the flue gas is reheated to dry it before entering the stack, then droplet formation is reduced, but energy costs increase significantly
Solution Approach 1:
Instead of using energy-intensive reheating to prevent droplet formation, the invention accepts the condensation phenomenon and converts it into a beneficial process by collecting the condensate. The condensate collector captures the liquid droplets that form naturally, draining them away to prevent spitting, thereby eliminating the need for costly reheating while maintaining effective droplet management.
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
The solution significantly improves condensate removal efficiency and reduces the risk of spitting by ensuring effective collection and drainage of droplets, maintaining a high removal efficiency and minimizing re-entrainment.
Implementation Method 1
the pressure difference between the front and back streams forces flue gas into the collector
Implementation Method 2
the enclosure defines a flow path for flue gas from the inlet to the exit, wherein liquid droplets are separated from the flue gas
Data Source
AI summary
A guide vane for deflecting flue gas in a wet stack comprises a front guiding face and an opposite back face and a condensate collector for removing liquid droplets from the flue gas. The condensate collector comprises an enclosure having an inlet for entering flue gas in the front guiding face of the guiding vane, and an outlet for leaving flue gas. The enclosure defines a flow path for flue gas from the inlet to the exit, where liquid droplets will be removed from the flue gas. The condensate collector also is provided with a gutter for collecting liquid droplets separated from the flue gas.