Desulfurization Device for Sulfuric Acid Production
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Solution Overview
Problem
Existing desulfurization methods for sulfuric acid production, particularly those using activated carbon-based catalysts, face challenges in achieving high yields of concentrated sulfuric acid while minimizing environmental impact and costs associated with chemical usage and sulfate disposal.
Innovation Solution
A desulfurization method and device that removes sulfur oxides from discharge gases and forms dilute sulfuric acid, which is then mixed with an aqueous sulfuric acid solution to produce concentrated sulfuric acid, utilizing an activated carbon-based catalyst and incorporating a humidification step to enhance desulfurization efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If alkali neutralization method or lime-gypsum method is used for desulfurization, then sulfur oxides are removed from discharge gas, but chemicals must be purchased and sulfate waste must be disposed of which increases cost and operational complexity
Solution Approach 1:
The patent converts the harmful sulfur oxides in the discharge gas into beneficial dilute sulfuric acid through catalytic oxidation on activated carbon. This dilute sulfuric acid is then mixed with concentrated sulfuric acid to produce the final product, thereby converting a waste stream into a valuable resource and eliminating the need for chemical purchases and waste disposal operations
Solution Approach 2:
The system uses the sulfur oxides present in the own discharge gas as the raw material for producing dilute sulfuric acid, which is then fed back to the sulfuric acid production process. This self-service approach eliminates external chemical inputs and waste disposal requirements
2Object-affected harmful factors
If activated carbon-based catalyst is used for desulfurization, then sulfur oxides are converted to dilute sulfuric acid without chemical usage, but the yield of concentrated sulfuric acid is reduced due to dilution
Solution Approach 1:
The patent merges the desulfurization process with the sulfuric acid production process by combining the dilute sulfuric acid stream from the desulfurization unit with the concentrated sulfuric acid stream. This integration allows the dilute acid to be reused as a raw material, thereby maintaining high concentrated sulfuric acid yield while achieving effective sulfur oxide removal
Solution Approach 2:
Instead of discarding the dilute sulfuric acid produced in the desulfurization process, the system recovers and reuses it by mixing with concentrated sulfuric acid. This recovery approach maximizes product yield and eliminates waste
3Object-affected harmful factors
If conventional desulfurization methods are used, then sulfur oxides are removed, but environmental pollution is caused through chemical usage and sulfate waste generation
Solution Approach 1:
The harmful sulfur oxides are converted into beneficial dilute sulfuric acid through catalytic oxidation, eliminating the need for chemical reagents and preventing sulfate waste generation. The process transforms an environmental hazard into a valuable resource
Solution Approach 2:
The system achieves self-service by using the sulfur oxides in its own discharge gas as the feedstock for producing dilute sulfuric acid, which is then recycled back into the production process, creating a closed-loop system with no external chemical inputs or waste outputs
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 allows for efficient desulfurization of sulfuric acid production gases without chemical usage, reducing environmental impact and increasing the yield of concentrated sulfuric acid, while minimizing costs for chemical purchase and sulfate disposal.
Implementation Method 1
utilizing an activated carbon-based catalyst
Implementation Method 2
converts the sulfur oxide to dilute sulfuric acid
Implementation Method 3
incorporating a humidification step to enhance desulfurization efficiency
Implementation Method 4
mixes the dilute sulfuric acid with the aqueous sulfuric acid solution
Data Source
AI summary
This desulfurization device is for desulfurizing a discharge gas which contains sulfur oxides and which was discharged from a device for sulfuric acid production that includes a concentrated-sulfuric-acid production step in which sulfur trioxide gas obtained by oxidizing sulfur dioxide gas is absorbed in an aqueous sulfuric acid solution while supplying water thereto to thereby produce sulfuric acid having a concentration as high as 90 wt % or more but less than 99 wt %, the desulfurization device comprising: a desulfurization tower in which the sulfur oxides are removed from the discharge gas and, simultaneously therewith, dilute sulfuric acid is formed from the sulfur oxides; and a dilute sulfuric acid mixer which, in the concentrated-sulfuric-acid production step, mixes the dilute sulfuric acid with the aqueous sulfuric acid solution.