Waste Gas Purification System with Integrated Absorption Tower
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Solution Overview
Problem
Current waste gas treatment technologies are inefficient and costly for removing complex pollutants containing organic and inorganic components from industrial flue gases, as they often require complex systems, high ozone consumption, and are not suitable for simultaneous removal of multiple pollutants like NOx, VOCs, SO2, heavy metals, and fluorides.
Innovation Solution
A waste gas purification system combining an adsorption-catalysis-oxidation unit with an enhanced absorption unit, utilizing ozone and activated carbon for initial pollutant removal, followed by a heat exchange and absorption process with pH-adjusted reagents, to achieve efficient removal of pollutants through sequential treatment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional flue gas treatment technology and organic waste gas treatment technology are combined, then pollutant removal effectiveness is improved, but device complexity and space occupation increase
Solution Approach 1:
The patent combines desulfurization, denitrification, VOC removal, heavy metal removal, and fluoride removal into a single integrated absorption tower using one absorption liquid that simultaneously performs all functions. This merging of multiple treatment processes into one device resolves the contradiction by achieving comprehensive pollutant removal effectiveness while reducing device complexity and space occupation compared to conventional separate treatment systems.
Solution Approach 2:
The absorption liquid is designed with multi-functional properties to simultaneously remove multiple types of pollutants (SO2, NOx, VOCs, heavy metals, and fluorides) through a single absorption process. This universal approach allows one substance to perform multiple treatment functions, thereby improving overall pollutant removal effectiveness while avoiding the need for multiple separate treatment devices and complex process integration.
2Reliability
If ozone is used for pollutant removal, then removal effectiveness is improved, but ozone consumption and operational costs increase
Solution Approach 1:
The patent optimizes ozone dosage parameters and introduces alternative oxidation mechanisms through the absorption liquid composition to reduce reliance on high ozone consumption. By adjusting operational parameters and chemical composition, the system achieves effective pollutant removal while minimizing ozone usage and associated costs.
3Reliability
If absorption liquid is used for pollutant removal, then removal effectiveness is improved, but secondary volatilization of pollutants occurs
Solution Approach 1:
The patent employs a composite absorption liquid containing multiple chemical components (alkali, oxidizing agents, complexing agents) that work synergistically to remove pollutants while preventing their secondary volatilization. The composite formulation ensures strong pollutant binding and conversion to stable forms, eliminating the harmful effect of secondary volatilization while maintaining high removal effectiveness.
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 system achieves high pollutant removal efficiencies (>90% for SO2, NOx, VOCs, heavy metals, and chlorides) with reduced operational costs, flexible process selection, and wide applicability in treating complex waste gases, while minimizing ozone usage and maintaining a compact design.
Implementation Method 1
utilizing ozone and activated carbon for initial pollutant removal
Implementation Method 2
utilizing ozone and activated carbon for initial pollutant removal
Implementation Method 3
followed by a heat exchange and absorption process with pH-adjusted reagents
Implementation Method 4
waste gas enters a heat exchange device of the flue gas discharge and heat exchange unit through a first waste gas delivery pipeline to perform heat exchange
Data Source
AI summary
A waste gas purification system according to an embodiment includes an adsorption-catalysis-oxidation unit, an enhanced absorption unit, an air inducing unit, and a flue gas discharge and heat exchange unit that are sequentially connected. The waste gas enters a heat exchange device of the flue gas discharge and heat exchange unit through a first waste gas delivery pipeline to perform heat exchange, then is converged with waste gas in a second waste gas delivery pipeline and enters a third waste gas delivery pipeline. Waste gas in the third waste gas delivery pipeline is purified after sequentially passing through the adsorption-catalysis-oxidation unit and the enhanced absorption unit. Purified flue gas is introduced into the flue gas discharge and heat exchange unit by the air inducing unit, and the purified flue gas is discharged after performing heat exchange with the heat exchange device.