Centrifugal Blower Internal Gas Mixing for Chemical Reactors
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Solution Overview
Problem
Conventional centrifugal blowers used in chemical reactors often require external mixing devices to achieve uniform gas mixing, which increases structural complexity and can cause back pressure, limiting the efficiency of gas flow in reaction zones.
Innovation Solution
A centrifugal blower system with an internal gas flow inlet that allows for the uniform mixing of separate gas streams within the blower, eliminating the need for external mixing devices and reducing back pressure by ensuring thorough mixing before the gases are introduced into the reaction zone.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If external mixing devices are used to achieve uniform gas mixing, then mixing uniformity is improved, but device complexity increases and back pressure rises
Solution Approach 1:
The patent merges the mixing function with the centrifugal blower by incorporating a secondary gas inlet directly into the blower housing. This allows the blower to perform both gas transport and mixing functions simultaneously, eliminating the need for separate external mixing devices and reducing overall system complexity while maintaining effective gas mixing uniformity.
Solution Approach 2:
The centrifugal blower is designed to perform multiple functions: it not only transports the primary gas stream but also introduces and mixes a secondary gas stream through an integrated secondary inlet. This multi-functional design eliminates the need for dedicated mixing devices, reducing device complexity while achieving uniform gas mixing.
2Stability of the object's composition
If external mixing devices are used to achieve uniform gas mixing, then mixing uniformity is improved, but back pressure increases
Solution Approach 1:
By combining the mixing function with the blower's gas transport function through an integrated secondary inlet, the system eliminates additional pressure drops that would occur across separate mixing devices. The mixing occurs within the blower's existing flow path, avoiding extra back pressure while still achieving uniform gas mixing.
Solution Approach 2:
The secondary gas is introduced and mixed with the primary gas stream before the gases enter the reaction zone. This preliminary mixing action within the blower ensures uniform composition is achieved upstream, preventing the need for additional mixing stages downstream that would increase back pressure across the reaction system.
3Device complexity
If turbulent mixing is relied upon for gas mixing, then device complexity is reduced, but mixing uniformity is insufficient
Solution Approach 1:
The centrifugal blower's impeller and housing act as an intermediary mixing mechanism between the primary and secondary gas streams. The rotating impeller creates controlled turbulence and flow patterns that enhance mixing uniformity beyond simple turbulent mixing, while the integrated design avoids the complexity of dedicated mixing devices.
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 system achieves a more uniform mixture of gases without external mixing devices, simplifying the blower's connection structure and reducing back pressure, thereby enhancing gas flow efficiency in chemical reactors.
Implementation Method 1
A centrifugal blower includes a housing having an axially directed gas inlet and a radially directed gas outlet, an impeller disposed within the housing for drawing gas at a first pressure into the inlet and expelling gas at a second higher pressure through the outlet
Implementation Method 2
an impeller disposed within the housing for drawing gas at a first pressure into the inlet and expelling gas at a second higher pressure through the outlet and a motor for driving, i.e., spinning, the impeller
Data Source
Figure 1A~1B
Figure 1C~1D
Figure 2~3
AI summary
A centrifugal blower system has internal gas mixing capability.