Smoke Treating Unit Selection for Roasting Apparatus Emissions
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Solution Overview
Problem
Existing solutions for reducing harmful compounds emitted during coffee bean roasting in small batch roasting settings, such as shops and cafes, are inadequate, as they often fail to achieve zero emissions and can be costly, large, and inefficient, posing health risks and operational challenges due to high temperatures, noise, and high electrical consumption.
Innovation Solution
A method to select a smoke treating unit based on room and roasting data, calculating contaminant concentrations, and comparing them to health regulations, allowing for the choice of a unit that effectively reduces emissions to safe levels, using a variety of treatment technologies including afterburners, catalytic converters, filters, and ducts, tailored to specific roasting apparatuses and environments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a powerful smoke treating unit is used to treat high levels of harmful compounds, then the emission reduction effectiveness is improved, but the size, cost, and complexity of the unit increase
Solution Approach 1:
The smoke treating unit dynamically adjusts its treatment capacity based on real-time monitoring of contaminant levels. The control unit modifies operational parameters such as heating power, ventilation rate, and treatment intensity according to the detected concentration of harmful compounds, allowing the system to scale its effectiveness to match actual emission levels rather than operating at fixed maximum capacity
Solution Approach 2:
The system changes operational parameters based on detected contaminant levels. The control unit adjusts temperature, ventilation rate, and treatment method selection according to real-time measurements of CO, CO2, and other harmful compounds, enabling the smoke treating unit to adapt its performance characteristics to match the actual roasting conditions and emission levels
2Reliability
If a catalytic converter is used to treat smoke, then the emission reduction effectiveness is improved, but the temperature requirements cause harmful effects on the shop environment and risk of burning
Solution Approach 1:
The control unit dynamically adjusts the temperature parameter based on detected contaminant levels and selected treatment methods. When using catalytic converters, the system maintains temperature within the optimal range (300-600°C) by modulating heating power and ventilation, preventing excessive temperature rise that would affect the shop environment or create safety risks
Solution Approach 2:
The system uses sensors to continuously monitor contaminant levels (CO, CO2, other harmful compounds) and feeds this information back to the control unit. Based on this feedback, the control unit adjusts temperature, ventilation rate, and treatment intensity to achieve effective emission reduction while maintaining safe operating conditions that prevent harmful temperature effects on the shop environment
3Reliability
If a powerful ventilation system is used to evacuate smoke, then the emission reduction effectiveness is improved, but the noise level increases
Solution Approach 1:
The ventilation system operates dynamically with variable speed control based on real-time contaminant levels. The control unit adjusts the ventilation rate to match the actual emission intensity during different roasting phases, using higher ventilation rates only when contaminant levels are high and reducing ventilation when emissions are low, thereby minimizing noise while maintaining effective smoke evacuation
Solution Approach 2:
The system changes the ventilation rate parameter according to detected contaminant concentrations and roasting phase. The control unit modulates ventilation speed to provide adequate smoke evacuation during high-emission periods while reducing ventilation intensity during low-emission periods, effectively balancing emission control performance with noise reduction
4Reliability
If a duct connecting roaster smoke outlet to outside is used, then the emission reduction effectiveness is improved, but the space occupied in the shop increases
Solution Approach 1:
The smoke treating unit is integrated within or adjacent to the roaster structure, with the ductwork routed through existing spaces and architectural features. The treatment components are nested within the roaster's structural envelope or positioned in unused vertical spaces, minimizing the additional volume occupied in the shop while maintaining effective smoke evacuation and treatment functionality
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
This method ensures the safe operation of coffee bean roasting systems by selecting the appropriate smoke treating unit, reducing harmful contaminant concentrations to comply with health and safety regulations, while being cost-effective and suitable for small-scale operations, minimizing health risks and operational challenges.
Implementation Method 1
The smoke treating unit is selected from a group of different smoke treating units differing by their performances to treat contaminants of the smoke
Implementation Method 2
The existing solutions consist in filtering or using catalytic converter to catch or destroy harmful compounds of the smoke
Implementation Method 3
The existing solutions consist in filtering or using catalytic converter to catch or destroy harmful compounds of the smoke
Data Source
AI summary
The invention concerns a method to select the smoke treating unit (3) of a system (1) of a roasting apparatus (2) and an associated smoke treating unit when said system is used in a room (10), said method comprising:—receiving room data input,—receiving roasting use data input in order to determine the quantity of each contaminant produced by the roasting apparatus during a period,—for each system of the roasting apparatus and of one smoke treating units, calculating the concentration of each contaminant present in the room during said period,—for each system and for each contaminant, comparing the calculated concentration of said contaminant present in the room during the period with the concentration of said contaminant authorised according to local health and safety regulations,—selecting the smoke treating unit of the system in the list of smoke treating units providing for each contaminant a calculated concentration inferior to the authorised concentration.