Denitration Catalyst Plate-like Draft Stopper Flow Control
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Solution Overview
Problem
Existing denitration catalyst structures face challenges in hindering gas flow between the frame body and plate-like catalytic elements without obstructing it, which affects contact efficiency and leads to increased ventilation losses and potential bias of catalytic elements.
Innovation Solution
A denitration catalyst structure that incorporates a plate-like draft stopper with a mechanism to hinder gas flow between the frame body and catalytic elements, such as ridges on the draft stopper, allowing gas to pass without complete obstruction, thus maintaining contact efficiency and preventing element bias.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the space between the frame body and plate-like catalytic elements is filled completely to hinder gas flow, then contact efficiency with catalytic components is improved, but ventilation losses increase greatly due to smaller cross-sectional area
Solution Approach 1:
The draft stopper is designed with a porous structure that allows gas to pass through while still providing a physical barrier to prevent direct flow between the frame body and catalytic elements. The porous material maintains adequate cross-sectional area for gas flow, reducing ventilation losses while still achieving the desired contact efficiency improvement for denitration.
2Productivity
If fiber clumps are used to fill the space to hinder gas flow, then contact efficiency is improved, but the plate-like catalytic elements become biased to one side due to low elasticity
Solution Approach 1:
The draft stopper is constructed as a flexible plate-like structure that can adapt to the spatial constraints within the frame body while maintaining its position. This flexibility prevents the catalytic elements from being biased to one side, ensuring stable alignment and proper spacing throughout the reactor.
Solution Approach 2:
The draft stopper is divided into multiple plate-like segments arranged in the gas flow direction. This segmentation allows each segment to independently adjust and maintain the proper spacing between catalytic elements, preventing bias while ensuring consistent gas flow distribution throughout the entire reactor length.
3Productivity
If a draft stopper is introduced to hinder gas flow, then contact efficiency with catalytic components is improved, but device complexity increases
Solution Approach 1:
The draft stopper serves multiple functions simultaneously: it hinders gas flow to improve contact efficiency, maintains proper spacing between catalytic elements, prevents element bias, and supports the catalytic elements within the frame body. This multi-functionality reduces the need for additional separate components, thereby limiting the increase in device complexity.
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 structure achieves a high denitration rate by optimizing gas flow and contact efficiency with catalytic components, while minimizing ventilation losses and ensuring proper alignment of catalytic elements.
Implementation Method 1
The plate-like draft stopper has a mechanism which hinders a flow of the gas passing between the inner surface of the frame body and the side edges of each plate-like catalytic element without stopping the flow
Implementation Method 2
Nitrogen oxides in the gas emitted from furnaces of boilers in thermal power plants and various factories and furnaces of refuse incinerators are decomposed in the presence of denitration catalysts to purify the exhaust gas
Data Source
AI summary
A denitration catalyst structure includes: a rectangular frame body having a gas inlet and a gas outlet; a plurality of plate-like catalytic elements each of which has a gas inlet-side edge, a gas outlet-side edge, and two side edges and contains a catalytic component; and a plate-like draft stopper having a gas inlet-side edge, a gas outlet-side edge, and two side edges. The plurality of plate-like catalytic elements are stacked and housed in the frame body with the side edges aligned, with a space between the stacked plate-like catalytic elements and between an inner surface of the frame body and the side edges of each plate-like catalytic element to allow a gas to pass from the gas inlet to the gas outlet through the space. The plate-like draft stopper is arranged between the inner surface of the frame body and the side edges of each plate-like catalytic element.