Mixer Element Vortex Integration for Flue Gas Mixing
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Solution Overview
Problem
Existing methods for mixing fluid flows with large gas flows, such as in denitrification processes, do not optimally integrate the fluid into the vortex system formed on mixer disks, leading to inefficient distribution and mixing.
Innovation Solution
A twisted fluid flow is directed perpendicularly to the mixer element, creating a centrifugal force that forms a hollow jet which follows the curvature of the outlet, resulting in a flat jet that spreads radially and is evenly distributed over the outflow side of the mixer element, ensuring complete integration into the vortex system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the pipe socket ends behind the leading edge of the mixer disk without overlapping the mixer disk, then the structure is simpler and easier to manufacture, but the conditioning agent is not optimally mixed into the vortex system
Solution Approach 1:
The invention changes the spatial arrangement by extending the pipe socket to overlap the mixer disk in the flow direction, transforming the mixing from a single-point injection behind the disk to a distributed injection across the disk surface, thereby improving integration into the vortex system
Solution Approach 2:
The mixer disk itself serves as an intermediary surface that distributes the conditioning agent across its peripheral partial surface, facilitating optimal integration into the vortex system formed by the inclined disk
2Device complexity
If the laminar flow of conditioning agent impinges on the peripheral partial surface of the outflow side of the mixer disk, then the injection point is simplified, but the mixing is not optimal into the vortex system
Solution Approach 1:
The invention applies local quality by directing the conditioning agent to impinge on specific peripheral partial surfaces of the outflow side of the mixer disk, optimizing the local interaction with vortex structures at different positions around the disk perimeter
3Productivity
If additional chambers and flow channels are added to the mixer disk for fluid distribution, then the fluid distribution is improved, but the device complexity increases
Solution Approach 1:
The invention segments the fluid distribution by using multiple pipe sockets positioned at different locations along the mixer disk, with each socket serving a specific peripheral partial surface, thereby achieving comprehensive coverage without requiring complex internal chambers
Solution Approach 2:
The mixer disk performs multiple functions: it creates the vortex system through its inclination, distributes the conditioning agent across its surface, and serves as the injection platform for multiple pipe sockets, eliminating the need for separate distribution chambers
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 approach ensures uniform distribution of the fluid over the entire outflow side of the mixer element and effective introduction into the vortex system, enhancing the mixing process and preventing dust backflow.
Implementation Method 1
A twisted fluid flow is directed perpendicularly to the mixer element, creating a centrifugal force that forms a hollow jet which follows the curvature of the outlet
Implementation Method 2
the flow vortices that form on the inclined mixer disk are referred to as leading edge vortices
Data Source
Figure 1~3
Figure 4~6
Figure 7~9
AI summary
A process is disclosed for mixing a fluid stream (F) with a large flow-rate gas stream (2), in particular for introducing a reducing agent into flue gas containing nitrogen oxides, in which process the large flow-rate gas stream impinges against the inflow side of at least one disk-like mixer element (1; 8) arranged at an angle against the direction of flow, and across which eddy currents (3) are formed, and the fluid stream is added to the large flow-rate gas stream downstream from the mixer element. In order to mix the fluid stream more completely with the large flow-rate gas stream, the fluid stream is added in the form of a swirling flow (7; 10). For that purpose, the swirling fluid flow is preferably led on the outflow side (8b) (lee side) of the mixer element (8) substantially perpendicularly to the mixer element (8) and substantially towards the centre (M) of the mixer element, and the fluid enters the eddy current from the centre of the mixer element, past its outflow side. However, it is also possible for the swirling fluid flow to be led on the inflow side (1a) (windward side) substantially perpendicularly to the mixer element (1) and to exit through an opening (8) located substantially in the centre (M) of the mixer element, on the outflow side (1b) (lee side) of the mixer element, and for the fluid to enter the eddy current from the centre of the mixer element, past the outflow side. The invention is also directed to a corresponding device.