Gasifier Drying Furnace Temperature Feedback for Uniform Heating
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Solution Overview
Problem
Current drying furnace devices for gasifiers struggle to maintain even internal temperatures and achieve accurate temperature control during the drying process, which can lead to furnace wall cracking due to uneven heating.
Innovation Solution
A drying furnace device for gasifiers that utilizes high-temperature steam and an automatic temperature adjustment system, comprising a drying-furnace feeding device, temperature detection device, and automatic control valve, ensures uniform heating and precise temperature control by using a heat-resistant hose filled with mercury for thermal expansion and a spring-activated steam pipe for uniform steam distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional drying furnace devices are used, then the drying process can be performed, but the internal temperature of the gasifier cannot be kept even and the drying temperature control accuracy is insufficient
Solution Approach 1:
The patent implements a feedback control system where thermocouples detect the temperature difference between upper and lower parts of the gasifier, and this signal is fed back to an automatic control valve that adjusts the steam flow accordingly. When the temperature difference exceeds the threshold, the control valve automatically opens to introduce steam for heating, thereby maintaining temperature uniformity and improving both measurement precision and reliability.
Solution Approach 2:
The system employs self-regulating control where the temperature detection mechanism automatically triggers the heating response without external intervention. The control valve is designed to automatically open when the temperature difference threshold is exceeded, allowing the system to self-correct temperature unevenness and maintain reliable operation.
2Productivity
If the maximum and minimum temperature difference is not controlled within 100°C, then the heating process can be faster, but the furnace wall may be cracked
Solution Approach 1:
The feedback control system continuously monitors the temperature difference between upper and lower thermocouples and automatically adjusts the steam flow through the control valve. This ensures that the temperature difference remains within the safe 100°C threshold, preventing furnace wall cracking while maintaining optimal heating speed by only introducing steam when necessary.
Solution Approach 2:
The system dynamically changes the steam flow parameter based on the detected temperature difference. When the temperature difference exceeds 100°C, the control valve opens to increase steam flow; when it is within the threshold, the valve remains closed. This parameter adjustment ensures safe heating rates that prevent structural damage while maintaining productivity.
3Measurement precision
If manual temperature monitoring and adjustment is performed, then the drying process can be controlled, but the operation complexity increases and accuracy is insufficient
Solution Approach 1:
The system is designed to be self-operating, with the temperature detection device and automatic control valve working together to automatically monitor and adjust the drying temperature. The control valve automatically opens or closes based on the temperature difference signal, eliminating the need for manual intervention and achieving high precision temperature control while maintaining operational simplicity.
Solution Approach 2:
The automatic feedback control system eliminates manual operation by continuously monitoring temperature and automatically adjusting steam flow. The control valve responds automatically to temperature difference signals, providing precise temperature control without requiring operator intervention, thus improving both accuracy and ease of operation.
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 solution ensures uniform heating throughout the gasifier, preventing cracking and improving temperature control accuracy, allowing for better strength and high-temperature resistance of the furnace wall.
Implementation Method 1
The inside of the heat-resistant hose is filled with liquid with obvious thermal expansion cooling effects and high temperature resistance
Implementation Method 2
A control sleeve is sleeved outside the lower half of the steam pipe. The top of the control sleeve is fixedly provided with a spring A, and the top of the spring A is fixedly connected with the top inner wall of the protective sleeve
Implementation Method 3
The bottom of the steam pipe penetrates into the inside of the furnace wall
Implementation Method 4
uses high-temperature steam to dry the gasifier
Data Source
AI summary
A drying furnace device of a gasifier capable of automatically adjusting temperatures includes a gasifier and a drying furnace assembly. The gasifier includes a furnace wall. A top of the furnace wall is provided with a coal inlet, a top side of the furnace wall is provided with a gas outlet, and an outside of a bottom of the furnace wall is provided with a cooling layer. The drying furnace assembly includes a drying-furnace feeding device, a temperature detection device and an automatic control valve. The drying-furnace feeding device is detachably installed inside the coal inlet. The automatic control valve is detachably installed at one end of a coal gas outlet away from the furnace wall. The temperature detection device is installed at an outside of a middle of the furnace wall, and the temperature detection device is connected with the automatic control valve through a heat-resistant hose.