Rapid temperature control system for wire-mesh reactors

Abstract

The invention belongs to the technical field of temperature control, and especially relates to a rapid temperature control system for wire-mesh reactors. The system is characterized in that the controlled object of the system is a wire-mesh reactor of which the temperature is collected by a thermocouple, the output signal of the thermocouple is voltage-transformed by a temperature transmitter and then transmitted to a core control unit, the core control unit calculates out the control quantity and inputs the control quantity to a power regulator, and the power regulator outputs the control quantity to a single-phase isolation transmitter to control the power actually added to the two ends of the wire-mesh reactor, thus forming closed-loop control of the temperature of the wire-mesh reactor; and principle computer monitoring software communicates with the core control unit through connection via a serial port and inputs a human instruction and parameters to the core control unit, and the core control unit refreshes and displays the current temperature value of the thermocouple on a display screen. The defect that there is a need to specially design a test bench-specific DC power regulator in the traditional method is overcome, and the limitation that there are only a few fixed choices for the heating rate of the traditional test bench is overcome.

Description

technical field [0001] The invention belongs to the technical field of temperature control, and in particular relates to a fast temperature control system for wire mesh reactors. Background technique [0002] Coal is the main energy source in today's world. For a long time, coal-fired power generation has occupied an absolute dominant position in my country's power production. The installed capacity of coal-fired generators has always accounted for more than 70% of my country's installed power generation capacity. The development of new technologies for clean and efficient combustion of coal is an important strategy for the sustainable development of our country and even countries in the world. Coal-fired boilers in large-scale power stations basically use pulverized coal combustion, and the combustion of pulverized coal in the boiler is a very short (less than 1 second) rapid heating reaction process. In order to deeply study the pyrolysis and combustion characteristics of...

AI Technical Summary

Problems solved by technology

At present, there are only two laboratory rapid heating reactors in China: a platform was developed by the Department of Thermal Energy of Tsinghua University in 2008, but the heating rate of this platform is only fixed, 50°C / s, 100°C / s, 1000°C / s, cannot be adjusted arbitrarily, and the heating can only be completed once, the maximum heating rate is only 1000℃ / s, and the power regulator part of the system uses a DC power regulator, the design and debugging process is cumbersome, and the system is not suitable for duplication and expansion

The Department of Automation of Shanghai Jiao Tong University developed a high-speed heating system for wire-network reactors based on labview in 2015. The implementation process is simple and the development cycle is short. However, the system only shows that the maximum heating rate that can be achieved is 700°C / s, and a special computer is required. Support, and the running speed of labview software is limited, it is not suitable for high-speed heating process control

Images