Ship Cofferdam Anticorrosion Machine Using Waste-Heat Drying
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Solution Overview
Problem
Existing anticorrosive construction machines for ship cofferdams face challenges in automating descaling and spraying processes, leading to high labor intensity, low construction efficiency, and prolonged drying times due to viscous material fluidity issues in low temperatures.
Innovation Solution
An anticorrosive construction machine that utilizes the heat from collected debris and air to increase the temperature and liquidity of anticorrosive materials, employing a heat exchange system to dry the materials post-spraying, improving air waste heat utilization and drying speed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If manual operation is used for descaling and spraying anticorrosive materials, then the equipment complexity is reduced, but the labor intensity increases and construction efficiency decreases
Solution Approach 1:
The patent combines multiple functions (grinding/descaling, debris collection, heating, and spraying) into an integrated construction machine. The grinding roller is coupled with a collection hood that captures debris, and both are integrated with a heating device and spraying system, allowing simultaneous operation of multiple processes without requiring separate equipment for each function.
Solution Approach 2:
The construction machine is designed as a multi-functional device that can perform descaling, debris collection, heating, and spraying operations within a single unit. The support device enables the machine to adapt to different positions and orientations, making it universally applicable for various bulkhead configurations while maintaining automated operation.
2Stability of the object's composition
If anticorrosive materials are applied in low temperature environment, then the material remains stable, but the fluidity decreases and drying time increases
Solution Approach 1:
The heating device pre-heats the anticorrosive materials before they are sprayed onto the bulkhead. This preliminary heating action ensures that the materials have appropriate fluidity for spraying while maintaining stability during application, and begins the drying process before the material even contacts the surface, significantly reducing overall drying time.
Solution Approach 2:
The system dynamically controls the temperature parameter of the anticorrosive materials by adjusting the heating device. The heating temperature can be modified based on environmental conditions and material properties, optimizing both fluidity for application and drying speed while maintaining material stability throughout the process.
3Temperature
If traditional heating methods are used for anticorrosive materials, then the material temperature can be increased, but the energy consumption increases
Solution Approach 1:
The system recovers waste heat from the grinding process, where friction between the grinding roller and bulkhead generates heat that would otherwise be lost. This waste heat is captured and utilized to warm the anticorrosive materials, converting a harmful byproduct into a useful resource for heating, thereby reducing the energy required from external heating sources.
Solution Approach 2:
The grinding process itself contributes to heating the anticorrosive materials through the waste heat generated by friction. The system is designed to capture and utilize this self-generated heat, making the process partially self-sufficient in terms of thermal energy requirements and reducing dependence on external energy sources.
4Productivity
If the grinding roller rotates at high speed to improve descaling efficiency, then the construction speed increases, but the energy consumption increases
Solution Approach 1:
The high-speed rotation of the grinding roller generates significant friction heat, which would normally be considered waste energy. The system captures this heat and uses it to warm the anticorrosive materials, converting the energy consumed during high-speed grinding into a useful thermal resource, thereby offsetting part of the energy expenditure and making the high-speed operation more energy-efficient overall.
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 the efficiency of the construction process by reducing energy consumption and shortening drying times through improved air waste heat utilization and material temperature management.
Implementation Method 1
heat exchange device utilizes the heat of collecting debris and air to heat the anticorrosive material to increase the temperature, liquidity and drying speed thereof
Implementation Method 2
the heat exchange device will filter the collected debris
Implementation Method 3
the separated air will be heated again and transported to the exhaust hood, so that the exhaust hood will dry the anticorrosive materials after spraying
Data Source
AI summary
An anticorrosive construction machine for cofferdam of a ship comprises a support, a grinding roller, a support device, a lifting device, a driving device, a heat exchange device, a spraying device, a machine case, a collecting hood, a fan, a first conveying tube and an exhaust hood; the grinding roller is rotatably arranged on inner wall of the support, the machine case is arranged on the support device, the support is arranged on a side of the machine case in a vertically moving mode via lifting device, the collecting hood is arranged on inner wall of support, the fan is arranged on outer wall of support, the driving device is arranged on the support for providing power for grinding roller and fan, input end of the first conveying tube is connected with the collecting hood, and output end of the first conveying tube is connected with the fan.