Low-Temperature Hydrocarbon Burner for Enclosed Habitats
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Solution Overview
Problem
Enclosed habitable environments experience a gradual buildup of hydrocarbons due to human metabolic processes, personal care products, materials outgassing, and equipment faults, leading to potentially hazardous concentrations over time, which existing air purifiers struggle to manage effectively.
Innovation Solution
A low-temperature hydrocarbon burner system with a regenerative heat exchanger and catalyst reactor that converts hydrocarbons into H2O and CO2, integrated into air recirculation and filtration systems to prevent hazardous buildup, operating below the decomposition temperatures of common refrigerants to avoid generating harmful byproducts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a conventional catalytic reactor operates at temperatures above 287-315°C to achieve sufficient catalytic activity, then hydrocarbon conversion efficiency is improved, but the risk of refrigerant decomposition and harmful byproduct generation increases
Solution Approach 1:
The patent changes the temperature parameter from conventional high temperatures (287-315°C) to low temperatures (below refrigerant decomposition points), fundamentally altering the operating conditions to avoid harmful effects while maintaining conversion efficiency through catalyst optimization
Solution Approach 2:
The patent employs a composite catalyst system combining multiple metal oxides (manganese oxide, copper oxide, zinc oxide, cerium oxide) to achieve effective catalytic activity at low temperatures without causing refrigerant decomposition, resolving the contradiction between conversion efficiency and safety
2Object-affected harmful factors
If a low-temperature catalytic reactor is used to avoid refrigerant decomposition, then safety is improved, but catalytic activity and hydrocarbon conversion efficiency may be reduced
Solution Approach 1:
The patent uses a composite catalyst comprising multiple metal oxides that work synergistically to provide sufficient catalytic activity at low temperatures, overcoming the typical limitation of reduced conversion efficiency at lower operating temperatures
Solution Approach 2:
The catalyst is supported on a porous material with high surface area, increasing the active catalytic sites available for hydrocarbon conversion at low temperatures, thereby maintaining productivity while operating safely below refrigerant decomposition points
3Use of energy by moving object
If a regenerative heat exchanger is added to the system to improve energy efficiency, then power consumption is reduced, but device complexity increases
Solution Approach 1:
The patent implements a regenerative heat exchanger that recovers thermal energy from the reactor outlet stream and uses it to preheat the incoming air stream, discarding waste heat and recovering useful energy to reduce overall power consumption while integrating smoothly into the existing system
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
The system effectively reduces hydrocarbon concentrations, maintaining a safe air supply for extended periods with minimal footprint and power consumption, eliminating the need for additional scrubbers and ensuring continuous operation without poisoning the environment.
Implementation Method 1
a regenerative heat exchanger, heating an output of the regenerative heat exchanger in a heater
Implementation Method 2
passing an output of the reactor through the regenerative heat exchanger, thereby transferring heat from the output of the reactor to the portion of air
Implementation Method 3
a catalyst mixture disposed in a reactor bed between the reactor inlet and the reactor outlet, the heater connecting the first heat exchanger outlet to the reactor inlet, and wherein the reactor is a low temperature reactor configured to convert at least one hydrocarbon to at least one of H2O and CO2
Implementation Method 4
converts hydrocarbons into H2O and CO2
Data Source
AI summary
A hydrocarbon burner for an enclosed environment includes a heat exchanger having a first heat exchanger inlet connected to an inlet of the hydrocarbon burner and a first heat exchanger outlet connected to a heater, and a second heat exchanger inlet connected to a reactor outlet and a second heat exchanger outlet connected to an outlet of the hydrocarbon burner. A reactor includes a reactor inlet, the reactor outlet, and a catalyst mixture disposed in a reactor bed between the reactor inlet and the reactor outlet. The heater connects the first heat exchanger outlet to the reactor inlet. The reactor is a low temperature reactor configured to convert at least one hydrocarbon to at least one of H2O and CO2.