Double-Sided Adhesive Tape With Asymmetric Projection Layout
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Solution Overview
Problem
Existing adhesive technologies fail to efficiently remove elemental mercury (Hg0) from flue gas and oxidized mercury (Hg2+) from waste liquid, with activated carbon injection being costly and its efficiency affected by NOx and SO2.
Innovation Solution
Utilization of metal sulfides (e.g., FeS2, CuS, CuFeS2) as mercury removal adsorbents, which contact with flue gas and waste liquid, adsorbing and converting Hg0 from flue gas and Hg2+ from waste liquid into stable mercury sulfide compounds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If activated carbon injection is used for mercury removal, then mercury removal capability is improved, but operational cost increases and efficiency is reduced due to NOx and SO2 interference
Solution Approach 1:
The patent changes the chemical parameter of the adsorbent from activated carbon to metal sulfides (FeS2, CuS, CuFeS2), which fundamentally alters the interaction mechanism with mercury compounds. This parameter change enables selective adsorption of Hg0 and Hg2+ without interference from NOx and SO2, resolving the efficiency-cost contradiction by achieving higher removal efficiency at lower operational cost
Solution Approach 2:
The patent employs composite metal sulfide materials (FeS2, CuS, CuFeS2) that combine the advantages of high mercury affinity with resistance to interference from other flue gas components. These composite materials provide both high reliability in mercury removal and cost-effectiveness by eliminating the need for expensive activated carbon injections
2Reliability
If different projections are manufactured on both sides of adhesive tape, then adhesion force differentiation is improved, but manufacturing complexity increases
Solution Approach 1:
The patent applies local quality by creating different surface densities of projections on the two sides of the adhesive tape carrier. The first side has a first surface density while the second side has a second surface density, allowing each side to be optimized for specific adhesion requirements without requiring completely different projection structures, thus managing manufacturing complexity through localized variation
Solution Approach 2:
The patent changes the parameter of surface density to differentiate adhesion forces between the two sides. By adjusting the surface density of projections rather than fundamentally changing the projection geometry on both sides, the patent achieves adhesion force differentiation with reduced manufacturing complexity
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
Achieves efficient, cost-effective, and environmentally friendly simultaneous removal of Hg0 from flue gas and Hg2+ from waste liquid, avoiding secondary pollution and reducing operational costs.
Implementation Method 1
metal sulfides (e.g., FeS2, CuS, CuFeS2) as mercury removal adsorbents, which contact with flue gas and waste liquid, adsorbing and converting Hg0 from flue gas and Hg2+ from waste liquid into stable mercury sulfide compounds
Data Source
AI summary
An adhesive tape has a carrier and first and second projections, each of which is directly connected via one end to the carrier. The projections are situated on opposite carrier surfaces on the surface of the carrier. A first surface density with which the first projections are distributed on the first carrier surface is different from a second surface density with which the second projections are distributed on the second carrier surface. A further layer can be provided between layers of the carrier in order to be able to make the layers thinner while still maintaining high stability.