Froth Heater with Removable Core for Scale Buildup Prevention
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Solution Overview
Problem
Traditional froth heaters suffer from scale buildup, leading to blockages, reduced heat transfer, and manufacturing challenges, including high costs and poor thermal response due to scale detection issues and inefficient materials.
Innovation Solution
A froth heater design with a spiral channel and dual seal arrangement, featuring a multi-piece aluminum assembly with optimized flow paths and temperature sensors, allowing easy cleaning and scale removal, and improved thermal response.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a small diameter stainless steel tube is used for heating, then heat transfer efficiency is improved, but scale buildup causes blockage and prevents cleaning
Solution Approach 1:
The heater is divided into two separable parts: a removable heating element and a stationary housing. The heating element can be extracted through a access port for cleaning or replacement, while the housing remains fixed. This segmentation allows the small diameter heating tube to be accessible for maintenance without compromising its compact design for efficient heat transfer.
Solution Approach 2:
The heating element is designed to be completely removable from the housing through a access port. This extraction capability allows the heating element to be taken out for cleaning or replacement, solving the problem of scale buildup in small diameter tubes while maintaining the space-efficient design.
2Ease of manufacture
If cast heater blocks are used, then manufacturing is simplified, but casting voids and imperfections decrease performance
Solution Approach 1:
The heater is segmented into a housing and a separate heating element. The heating element can be manufactured using precision techniques (such as machining or additive manufacturing) to avoid casting defects, while the housing can be simpler in construction. This separation allows different manufacturing methods to be optimized for each component's specific requirements.
3Device complexity
If conventional RTD location is used, then sensor placement is simple, but thermal response is delayed and temperature overshoot occurs
Solution Approach 1:
The RTD sensor is positioned in a specific location on the heating element where it achieves optimal thermal coupling with the heating coil. This localized placement ensures the sensor is in direct thermal contact with the hottest part of the element, providing rapid thermal response and accurate temperature feedback without requiring complex placement procedures.
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
Enhances steam quality, reduces maintenance costs, and improves thermal response by minimizing scale buildup and manufacturing complexity.
Implementation Method 1
The heater can be any suitable heater (e.g., an electric resistive heater) configured to fit within the core cavity
Implementation Method 2
reduces heat transfer from the heater block to the water
Data Source
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AI summary
A froth heater (100) can include an outer case (101) defining an inner cavity (103), an inlet in fluid communication with the inner cavity (103), and an outlet in fluid communication with the inner cavity (103). The froth heater (100) can include a heater core (109) inserted into inner cavity (103) and configured to form a flow path between an inner wall of the outer case (101) and the heater core (109) between the inlet and the outlet. The heater core (109) can include a core cavity configured to receive a heater therein to heat the heater core (109).