Combustion control system for preheating zone of carbon ring type roasting furnace

Abstract

The invention relates to a combustion control system for a preheating zone of a carbon ring type roasting furnace. The combustion control system is an open type roasting furnace combustion control system or a cover type roasting furnace combustion control system, wherein the open type roasting furnace combustion control system or the cover type roasting furnace combustion control system is provided with a preheating zone, a heating zone and a cooling zone; the open type roasting furnace combustion control system comprises a smoke exhaust frame, a temperature and pressure measuring frame, an auxiliary combustion frame A, a high-temperature combustion frame A, a zero-pressure frame, a cooling frame and a central control system; the smoke exhaust frame, the temperature and pressure measuringframe and the auxiliary combustion frame A are arranged in the preheating zone, the high-temperature combustion frame A is arranged in the heating zone, and the zero-pressure frame and the cooling frame are arranged in the cooling zone; the cover type roasting furnace combustion control system comprises a communication smoke hood, an auxiliary combustion frame B, a high-temperature combustion frame B and a central control system; and the communication smoke hood and the auxiliary combustion frame B are arranged in the preheating zone, and the high-temperature combustion frame B is arranged inthe heating zone. The combustion control system has the advantages of being accurate in temperature control and improved in roasting quality.

Description

technical field [0001] The invention relates to the technical field of carbon roasting, in particular to a combustion control system for a preheating zone of a carbon ring roasting furnace. Background technique [0002] The heat required to increase the temperature of the carbon block in the preheating zone of the existing roaster is mainly provided by two parts, one part is the flue gas heat brought by the upstream flue gas, and the other part is the heat generated by the combustion of the carbon block itself after the volatile matter escapes. heat. Because the volatile matter in the preheating zone of the roaster does not escape uniformly, the temperature rises in the preheating zone of the roaster. Combustion, when the temperature in the preheating zone cannot keep up with the set temperature of the process, the current control method is single, and can only increase the negative pressure of the fire path and increase the flow of hot flue gas from the upstream to achieve...

AI Technical Summary

Problems solved by technology

Because the volatile matter in the preheating zone of the roaster does not escape uniformly, the temperature rises in the preheating zone of the roaster. Combustion, when the temperature in the preheating zone cannot keep up with the set temperature of the process, the current control method is single, and can only increase the negative pressure of the fire path and increase the flow of hot flue gas from the upstream to achieve temperature rise. Not only the heat loss of the flue gas is large, but the energy High consumption, and under special working conditions such as rapid temperature rise and fire path deformation, it still cannot meet the temperature rise requirements of the process, which directly affects the roasting quality of the carbon block

[0003] The temperature control of the high-temperature combustion frame in the existing heating zone adopts a fixed pulse control cycle, and the air injection time in the control cycle is adjusted according to the load change. Due to the limitation of the life of the actuator such as the solenoid valve, the current pulse control cycle is set for a long time, resulting in high combustion. When the load is on, the jet combustion time of a single control cycle is too long, forming a local high temperature, causing the burnout of the fire channel, affecting the service life of the roaster, and causing uneven distribution of the temperature field in the fire channel, large temperature difference, and poor roasting homogeneity, which directly affects the charcoal. Therefore, it is very necessary to provide a combustion control system for the preheating zone of the carbon ring roaster that can precisely control the temperature and improve the roasting quality.

Images