Continuous Reaction Calorimeter with Static Mixer Geometry
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Solution Overview
Problem
Existing reaction calorimeters, particularly batch systems, struggle to accurately measure specific reaction heat (Δh_r) due to differences between batch-like heat flow and continuous tube reactor conditions, necessitating a method for precise thermal flow measurement that can be scaled to larger systems.
Innovation Solution
A continuous reaction calorimeter with a mixer heat exchanger and multiple temperature measuring points along its length, featuring a static mixer geometry and thermal insulation to minimize heat losses, allowing for accurate heat transfer coefficient calculation and scaling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If batch-like heat flow calorimetry is used to measure specific reaction heat, then measurement can be performed with existing equipment, but the results differ significantly from actual continuous tubular reactor conditions
Solution Approach 1:
The invention changes the fundamental operating parameter from batch mode to continuous flow mode. The calorimeter is designed as a tubular reactor with continuous feed and product streams, allowing measurements under conditions that match actual continuous production reactors. This parameter change enables accurate determination of specific reaction heat relevant to continuous processing while maintaining measurement capability.
2Measurement precision
If continuous tubular reactor design is used for accurate heat measurement, then results are applicable to production reactors, but heat losses occur at inlet and outlet flange zones
Solution Approach 1:
The calorimeter is segmented into distinct functional zones: adiabatic reaction zones at the ends where heat generation occurs, and a thermally insulated middle section where measurement takes place. The inlet and outlet flange zones are isolated as separate segments with inherent heat loss, while the measurement section is protected by thermal insulation to minimize energy loss and ensure accurate heat flow determination.
Solution Approach 2:
Thermal insulation acts as an intermediary element between the reaction zone and the external environment. This insulation layer prevents direct heat transfer from the calorimeter to the surroundings, thereby reducing heat losses at the flange zones and maintaining thermal energy within the measurement system for accurate calorimetric analysis.
3Measurement precision
If multiple temperature measuring points are arranged along the pipe section, then heat transfer coefficient can be calculated accurately, but device complexity increases
Solution Approach 1:
The multiple temperature measuring points serve multiple functions simultaneously: they characterize the temperature profile along the reactor, enable calculation of heat transfer coefficients, provide data for reaction kinetics analysis, and allow verification of adiabatic conditions. This multi-functionality justifies the increased number of sensors by extracting maximum information from each measurement point.
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
Enables precise calorimetric measurements with minimal heat losses, achieving an accuracy of +/- 10% for specific reaction enthalpy determination and maintaining comparable mixing performance to larger reactors.
Implementation Method 1
The continuous reaction calorimeter has a mixer-heat exchanger with a static mixer geometry. The mixer-heat exchanger has an interior space for accommodating the mixer geometry, the interior space having an inner diameter of 4 to 16 mm. At least five temperature measuring points are arranged along a length of 500 mm of the mixer-heat exchanger
Implementation Method 2
several temperature measuring points arranged along its length. Within the pipe section, the reaction calorimeter includes a mixer-heat exchanger with a static mixer geometry
Implementation Method 3
the reaction calorimeter includes a mixer-heat exchanger with a static mixer geometry. The mixer-heat exchanger has an interior space for accommodating the mixer geometry
Data Source
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AI summary
A continuous reaction calorimeter has a first feedstream inlet (50) and outlet (70) for a product, a pipe zone (3) arranged between the first inlet (50) and the outlet (70), and several temperature measuring points (10) arranged along its length. Within the pipe zone (3), the reaction calorimeter includes a mixer-heat exchanger (30) with a static mixer geometry (33). The mixer-heat exchanger (30) has an interior space for accommodating the mixer geometry (33), the interior space having an inner diameter (D) of 4 to 16 mm. At least five temperature measuring points are arranged over a length of 500 mm along the mixer-heat exchanger (30), and the reaction calorimeter has at least one second feedstream inlet (60). This arrangement enables relatively accurate calorimetric measurement, in particular of the specific heat quantity. The results are scalable to large reactors.