Thermal Oxidizer Chamber Layout for Complete Waste Gas Oxidation
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Solution Overview
Problem
Existing thermal oxidizers fail to regulate the combustible mixture of waste gas and oxidant within the flammable range, leading to incomplete combustion and the formation of undesirable gases, and lack sufficient retention time for complete oxidation, resulting in inefficiencies and the production of harmful by-products.
Innovation Solution
A thermal oxidizer system incorporating an oxidation mixer, oxidation chamber, retention chamber, and heat dissipater, which regulates the mixture of waste gas and oxidant to ensure a combustible range, facilitates primary and secondary combustion reactions, and includes a heat dissipater for atmospheric venting, enhancing the conversion of waste gases into desirable oxidized gases.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If thermal oxidizer uses simultaneous suction of oxidant and venting of gases, then gas flow is maintained, but combustible mixture cannot be regulated within flammable range leading to incomplete combustion
Solution Approach 1:
The system divides the oxidation process into two distinct stages: a mixing chamber where oxidant and waste gas are mixed to form a combustible mixture, and an oxidation chamber where combustion occurs. This segmentation allows independent control of mixing and combustion processes, enabling regulation of the combustible mixture within the flammable range while maintaining gas flow.
Solution Approach 2:
The mixing chamber performs preliminary mixing of oxidant and waste gas before the mixture enters the oxidation chamber. This preliminary action ensures that the combustible mixture is properly formed and regulated within the flammable range before combustion begins, preventing incomplete combustion and harmful by-product formation.
2Device complexity
If thermal oxidizer operates without sufficient retention time, then device size is reduced, but complete oxidation of waste gas is not achieved
Solution Approach 1:
The system separates the mixing and combustion functions into different chambers, allowing the oxidation chamber to be optimized for combustion efficiency with appropriate retention time, while the mixing chamber handles the preliminary mixture formation. This segmentation enables complete oxidation without requiring the entire device to be oversized.
Solution Approach 2:
The system changes the physical and chemical parameters of the waste gas stream through controlled mixing with oxidant in the mixing chamber, creating a combustible mixture with optimal composition. This parameter change enables efficient combustion in the oxidation chamber with appropriate retention time, achieving complete oxidation without excessive device size.
3Temperature
If heating element is activated to generate heat waves, then waste gas is heated, but temperature regulation is insufficient leading to formation of nitrogen oxides
Solution Approach 1:
The system incorporates temperature sensing and control mechanisms that monitor the temperature of the waste gas stream and adjust the heating element activation accordingly. This feedback control ensures temperature remains within the optimal range for complete combustion while preventing the formation of nitrogen oxides, which occur at excessively high temperatures.
Solution Approach 2:
The system changes the temperature parameter of the waste gas stream through controlled heating, raising it to the combustion temperature range. Simultaneous control of the oxidant-to-waste-gas ratio and temperature ensures complete combustion without exceeding the temperature threshold that would generate harmful nitrogen oxides.
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 regulates the combustion process, reducing the formation of harmful gases and ensuring complete conversion of waste gases into desirable products like CO2, H2O, and N2, while also capturing greenhouse gases.
Implementation Method 1
an oxidation mixer, an oxidation chamber, a retention chamber and a heat dissipater forming a fluid flow path for thermal oxidation of a waste gas
Implementation Method 2
a heating element 22 within heating chamber 21 is activated to generate heat waves 23 for heating waste gas stream 32
Implementation Method 3
The heating of waste gas stream 32 is intended to facilitate a combustible oxidation 40 of waste gas stream 32 within POR chamber 24 into oxidized gases 41
Implementation Method 4
POR chamber 24 is configured and sized for an instantaneous combustible oxidation 40 of waste gas stream 32 without a sufficient retention time for a combustible mixture of waste gas stream 32 and oxidant 10
Implementation Method 5
a heat dissipater for atmospheric venting, enhancing the conversion of waste gases into desirable oxidized gases
Data Source
AI summary
A thermal oxidizer including an oxidation mixer, an oxidation chamber, and a retention chamber forming a fluid flow path for thermal oxidation of a waste gas. The thermal oxidizer also includes first and second electric heating elements. In operation, the first and second electric heating elements pre-heat portions of the thermal oxidizer. Once a threshold temperature has been reached, the oxidation mixer facilitates a combustible mixture of the waste gas and an oxidant into an combustible waste gas stream, the oxidation chamber facilitates a primary combustion reaction of the combustible waste gas stream into an oxygenated waste gas stream, the retention chamber facilitates a secondary combustion reaction of the oxygenated waste gas stream into oxidized gases and the heat dissipator reduces the temperature of the flow of oxidized gases within the heat dissipator.