The system adopts oven temperature feedback control system, the determination of time at carbonization end is judged by means of temperature of crude gas on standpipe, the optimizing control in coke oven heating is realized.
Througt the reasons that led to decrease quality of coke tar in Liangang were analyzed, its dominant factors were not to fill with coal in the coke oven, and so, the space of the top of coke oven was over big and its temperature was over high. It was got the content of free carbon also too high in the rough gas.
By means of changing the pressure measure point of the control system, using the rapid damper to conquer the system disturbance, adjusting the PID value of transmitter, the micro pressure of raw gas from coke oven was auto controlled to steady the process, reduce the environment pollution and improve the economic benefits.
It is designed aiming at petroleum, chemical, metallurgical enterprises and medium-sized power station gas, characteristics of fuel combustion boilers. It is mainly used for furnace ignition systems, rotary furnace ignition systems, raw gas ignition systems, gas and natural gas ignition systems and heating furnace ignition systems, but also for fire detection.
The process principle of burning ammonia and sulphur production in recovery of chemical products from gas of coke oven is introduced, the influence to clean feeding-out gas and system production when ammonia- and sulphur-bearing tail gas come back to raw gas is analyzed as emphasis.
However, problems with microbial growth on the pall rings in the absorption column, and in one case in the desorption column, have a negative impact on the upgrading of raw gas to vehicle gas.
On-line measurements of the raw gas have been carried out at the municipal waste incinerator (MWI) in Stuttgart.
Examples discussed include identification of phenanthrene as major constituent of the isomeric pair phenanthrene/anthracene and the structural identification of xylene isomers in the incinerator raw gas.
After combustion, the heat is transferred from the raw gas to the afterburning air in the raw gas cooler.
As the raw gas was completely converted to synthesis gas, no emission occurred.