Furnace Injector Gas Supply Control to Prevent Clogging
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Solution Overview
Problem
Existing gas supply apparatuses for melting furnaces face issues with clogging of injector devices due to continuous gas delivery when not in use, leading to high operating costs and potential explosive mixtures, and lack effective regulation of inert and purge gas flow rates.
Innovation Solution
A gas supply apparatus with a main feed line for process gas, secondary feed lines for inert and purge gases, and regulation units with flow meters and valves to control gas flow rates, ensuring safe and efficient operation by selectively regulating the flow of all gases without increasing complexity or cost.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If process gas is continuously supplied to injector devices, then clogging is prevented, but operating costs increase due to unnecessary gas consumption during non-productive periods
Solution Approach 1:
The patent implements periodic action by alternating between process gas supply and purge gas supply in a controlled cycle. During productive periods, process gas is supplied to prevent clogging. During non-productive periods, the system switches to purge gas supply or stops gas supply entirely, eliminating unnecessary process gas consumption while maintaining injector device functionality through periodic purging.
2Reliability
If purge gas is supplied in open/closed mode without flow rate control, then injector device clogging is prevented, but safety is compromised due to potential explosive mixtures in feed lines
Solution Approach 1:
The patent implements feedback control by using flow meters to continuously monitor the flow rate of purge gas and inert gas, with a control unit that adjusts the supply based on measured values. This ensures that the feed lines are properly purged and saturated, preventing explosive mixture formation while maintaining effective clogging prevention through controlled purge gas supply.
Solution Approach 2:
The patent introduces an intermediary inert gas supply system between the purge gas supply and the injector devices. The inert gas acts as a mediator that saturates the feed lines before purge gas is supplied, preventing the formation of explosive mixtures while still allowing the purge gas to effectively clear the injector devices of clogging materials.
3Reliability
If additional feed lines and control systems are added to regulate inert and purge gas flow rates, then safety and efficiency are improved, but device complexity increases
Solution Approach 1:
The patent implements universality by designing a control unit that manages multiple functions: it controls the supply of process gas, purge gas, and inert gas; it monitors flow rates through flow meters; and it coordinates the timing and flow rates of different gas supplies. This multi-functional control approach improves safety and efficiency without proportionally increasing device complexity, as a single control unit handles multiple regulatory tasks.
Data Source
AI summary
Apparatus (10) for supplying gas to a determinate number of injector devices (110) of a melting furnace (100) for the production of metal, comprising a main feed line (11), a first secondary feed line (14) and a second secondary feed line (17) which are respectively configured to supply, selectively and in a controlled manner, a process gas (G1), an inert gas (G2) and a purge gas (G3) to each of the injector devices (110).