Wet Abatement Inlet Casing Heating for Deposit Prevention
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Solution Overview
Problem
Conventional wet abatement systems face issues with the accumulation of foreign matters in treatment gas lines, leading to potential clogging and reduced efficiency, particularly due to the formation of condensable products and unstable reaction products near liquid supply areas, which can ignite due to static electricity.
Innovation Solution
A wet abatement system with a liquid film forming device on the inner wall surface of the inlet casing, heated by embedded cartridge heaters, combined with a purge gas supply and eductors to maintain a uniform liquid film and prevent accumulation, while using a heater to maintain a high temperature to inhibit condensation and foreign matter buildup.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a liquid film is formed on the inner wall of the inlet casing to remove foreign matters, then the abatement efficiency is improved, but foreign matters accumulate near the liquid supply area due to temperature decrease
Solution Approach 1:
The patent applies local heating to the specific region where foreign matters accumulate (near the liquid supply area) while maintaining the liquid film formation function. This localized temperature increase prevents condensation and foreign matter accumulation without disrupting the overall liquid film abatement process, thus resolving the contradiction between abatement efficiency and reliability.
Solution Approach 2:
The patent changes the temperature parameter in the region near the liquid supply area by embedding a heater in the inlet casing wall. This parameter change (temperature increase) prevents the condensation of foreign matters that would otherwise occur due to cooling from the liquid film, thereby preventing accumulation while maintaining the liquid film's foreign matter removal capability.
2Reliability
If the piping is heated to high temperature to prevent foreign matter accumulation, then foreign matter buildup is reduced, but energy consumption increases and safety risks arise from igniting unstable reaction products
Solution Approach 1:
Instead of heating the entire piping system to high temperatures, the patent applies localized heating only to the inlet casing wall near the liquid supply area where foreign matters tend to accumulate. This localized approach prevents foreign matter buildup while minimizing the volume of unstable reaction products exposed to high temperatures, thereby reducing ignition risk while maintaining reliability.
Solution Approach 2:
The patent applies partial heating action - heating only the specific region where foreign matter accumulation occurs rather than the entire system. This partial action is sufficient to prevent accumulation in the critical area while avoiding excessive heating that would create safety hazards from igniting unstable reaction products throughout the entire piping system.
3Reliability
If a scraper is used to mechanically remove foreign matters near the liquid supply area, then foreign matter accumulation is reduced, but static electricity from friction may ignite unstable reaction products
Solution Approach 1:
The patent replaces the mechanical scraping system with a thermal field approach (localized heating). Instead of using a scraper that generates static electricity through friction, the system uses a heater embedded in the inlet casing wall to create a temperature gradient that prevents foreign matter condensation and accumulation through thermal effects, thereby eliminating the ignition risk from static electricity while maintaining foreign matter 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
Prevents the accumulation of foreign matters in the treatment gas line, enhances treatment efficiency, and reduces the risk of ignition by maintaining a uniform liquid film and high temperature, thereby ensuring continuous operation and safety.
Implementation Method 1
a liquid film forming device provided between the inlet port and the outlet port and configured to form a liquid film on an inner wall surface of the inlet casing
Implementation Method 2
a heater configured to heat the inlet casing and embedded in an interior of a wall portion of the inlet casing
Data Source
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AI summary
A wet abatement system which can suppress the accumulation of foreign matters in a treatment gas line is proposed. There is provided a wet abatement system for detoxifying treatment gas by bringing the treatment gas into contact with liquid. The wet abatement system includes an inlet casing having an inlet port from which the treatment gas is let in and an outlet port provided below the inlet port and through which the treatment gas flows, and a liquid film forming device provided between the inlet port and the outlet port and configured to form a liquid film on an inner wall surface of the inlet casing. A heater configured to heat the inlet casing is embedded in an interior of a wall portion of the inlet casing, the wall portion constituting a portion situated above the liquid film forming device.