Anti-Clogging Nozzle for Wet Desulfurization Spray Towers
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Solution Overview
Problem
Existing gas cleaning and cooling systems using wet-type contact devices suffer from nozzle clogging, leading to inefficient gas treatment and increased operational costs due to the need for frequent cleaning and replacement of nozzles.
Innovation Solution
The use of anti-clogging nozzles with a dual orifice design, where the majority of the liquid flow is directed upward during operation and a small amount downward, providing a drainage route for particulates to prevent clogging when the system is not in use, reducing the need for frequent cleaning and replacement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional nozzles are used in wet-type contact devices, then liquid can be supplied for gas cleaning and cooling, but nozzle clogging occurs leading to inefficient gas treatment and increased operational costs
Solution Approach 1:
The nozzle is divided into multiple spray outlets arranged in different directions (upward, downward, lateral). This segmentation allows different portions of the nozzle to serve different functions: some outlets spray liquid during operation while others provide drainage pathways, preventing clogging by separating the spray function from the drainage function.
Solution Approach 2:
The nozzle design incorporates downward and lateral spray outlets that are positioned and oriented to create drainage pathways before clogging can occur. These outlets are strategically placed to drain particulates away from the upward spray outlets in advance, preventing accumulation and clogging before they affect gas treatment efficiency.
2Productivity
If nozzles spray liquid upward during operation, then gas cleaning efficiency is improved, but particulate accumulation causes clogging when the system is not in use
Solution Approach 1:
Instead of having all nozzles spray only upward during operation, the invention incorporates nozzles that spray in opposite directions (downward and lateral) during operation. This inversion of the conventional single-direction spray approach creates automatic drainage pathways that prevent particulate accumulation, solving the clogging problem while maintaining cleaning efficiency.
Solution Approach 2:
The multi-directional nozzle design serves multiple functions simultaneously: upward spray outlets provide the primary gas cleaning function, while downward and lateral outlets provide both supplementary cleaning and automatic drainage functions. This multi-functionality allows the nozzle system to maintain high gas cleaning efficiency while inherently preventing clogging through the drainage capability.
3Reliability
If frequent nozzle cleaning and replacement is performed, then nozzle clogging is prevented, but operational costs increase
Solution Approach 1:
The nozzle design is self-maintaining through its multi-directional spray configuration. The downward and lateral spray outlets automatically create drainage pathways that prevent particulate accumulation during operation. This self-service mechanism eliminates the need for frequent manual cleaning and replacement, significantly reducing operational costs while maintaining reliable nozzle functionality.
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 design significantly reduces nozzle clogging and associated operational costs by maintaining a continuous flow that prevents particulate accumulation, enhancing the efficiency and reliability of gas cleaning and cooling processes.
Implementation Method 1
a relatively small amount of liquid flow is discharged in a downward direction from an opposed extended portion
Implementation Method 2
about 90 to about 99 or more of which is sprayed in an upward direction from an upward extending portion
Data Source
Figure 1
Figure 2~3
Figure 4
AI summary
A method and apparatus or system (10) is provided for cleaning a flue gas and/or cooling a flue gas with a dispersed finely divided absorption liquid. As such, the absorption liquid is dispersed in a wet scrubber (12) through which flue gas flows for absorption liquid and flue gas intermingling and contact to produce a cleaned flue gas. The absorption liquid supplied to the wet scrubber (12) is dispersed from upwardly spraying anti-clogging nozzles (52) and downwardly spraying nozzles (50) arranged to maximize absorption liquid and flue gas contact with minimal spray interference between nozzles (50, 52).