Carbon roaster preheating area volatile component monitoring and temperature controlling device and method

Abstract

The invention relates to a carbon roaster preheating area volatile component monitoring and temperature controlling device and method. On the basis of an existing roaster flame control system, a detecting control device is additionally arranged in a preheating area, the control device comprises a rack which is provided with a cross arm beam frame body, a temperature measuring device, a pressure measuring device and an image collecting device are arranged on the cross arm beam frame body, and a pulse igniter is further arranged on the cross arm beam frame body. Under control of the control device, with a certain negative pressure range, by adjusting the opening degree of an air door of a smoke exhausting frame, the temperature of a flame path is controlled, and when the negative pressure reaches the range limit value, and the temperature in the preheating area does not reach the target value, by means of a self-absorbing type pulse combustor inserted into the flame path and provided with ignition and flame detection, the purpose of setting the temperature curve of the flame path of the preheating area according to the technology for temperature rising can be achieved. The device andthe method have the advantages of accurately analyzing the escape and combustion circumstances of volatile components in the preheating area online in real time, and adjusting the temperature of thepreheating area in time.

Description

technical field [0001] The invention relates to the technical field of carbon roasting, in particular to a device and method for monitoring volatile matter and controlling temperature in a preheating zone of a carbon 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. Due to the non-uniform escape of volatile matter in the preheating zone of the roasting furnace, the temperature rises in each stage of the preheating zone of the roasting furnace fluctuate greatly, and the distribution of the temperature field is uneven. When the temperature in the preheating zone cannot keep up with the set temperature of the process, the current control method can...

AI Technical Summary

Problems solved by technology

Because the volatile matter in the preheating zone of the roasting furnace does not escape uniformly, the temperature rise in the preheating zone of the roasting furnace fluctuates greatly at each stage, and the temperature field is unevenly distributed.

When the temperature in the preheating zone cannot keep up with the set temperature of the process, the current control method can only increase the negative pressure of the flue, increase the amount of hot flue gas from the upstream to heat transfer and increase the temperature, and when the flue gas amount is large, it will dilute the The concentration of volatile matter can easily cause the concentration of volatile matter to be too low to burn, forming a vicious circle

The existing temperature control method in the preheating zone of the roasting furnace not only consumes high energy consumption, but also cannot ensure that the temperature in the preheating zone meets the heating requirements of the process, which directly affects the roasting quality of carbon products

[0003] The combustion of volatile matter in the roasting preheating zone is directly related to roasting energy consumption, quality and environmental protection indicators. At present, there is a lack of collection and analysis of the combustion status in the preheating zone fire channel, and there is no effective monitoring and temperature control method for volatile matter in the preheating zone. The method of combining flue gas analysis and manual observation is often used, but the problem of this method is that there are many influencing factors, which are greatly affected by manual experience, and the adjustment and control are not timely, which affects the roasting quality of carbon products.

It also often results in a large amount of exhaust gas and serious energy loss, which is contrary to the current environmental protection concept of energy saving and emission reduction; It is very necessary to monitor the volatile matter in the preheating zone of the preheating zone and the temperature control device and method

Images