Converter ignition temperature
Thread Content
Please share the ignition temperature of your conversion furnace. For example: inlet temperature: 630–660, peak temperature: 610–630, outlet temperature: 550–570, water-to-gas ratio: 1.0. This post was last edited by wwg on 2009-3-4 at 20:55
Just by looking at your data, it’s clear that you use 200,000 tons of coke oven gas from Qinghua to produce methanol; I heard that there have been several explosions there! ! The water vapor ratio is too high; oxygen cannot ignite under such conditions. Try reducing the water vapor ratio to 0.8. Once the system is operating normally, you can increase the water vapor ratio slightly.
The temperature at which I initiate the combustion process is as follows: the temperature at the outlet of the preheating furnace is above 680 degrees, the temperature at the first point in the upper part of the conversion furnace is above 590 degrees; the ratio of oxygen to steam is 1:1, and the ratio of total steam to coke oven gas entering the furnace is 0.8 (on a volume basis).
Tag Number, Operation Control Point, High Alarm Value, Low Alarm Value
I. Temperature
TIC0401: Temperature of refined desulfurized coke oven gas – 200~380°C
TI0402: Temperature of raw coke oven gas – 250~380°C
TIC0403: Outlet temperature of superheated steam – 450°C
TIC0404: Temperature of steam-coke mixture – 650°C
TICA0405: Temperature of the water jacket in the oxygen conversion furnace – 90°C, 100°C
TRA0406: Upper temperature in the oxygen conversion furnace – <1450°C, 1450°C
TRSA0407: Temperature in the protection section of the oxygen conversion furnace – <1300°C, 1300°C
TRA0408: Catalyst temperature in the oxygen conversion furnace – ~1200°C, 1250°C
TRCA0410: Outlet temperature of the oxygen conversion furnace – 980°C, 1000°C
TIA0419: Water outlet temperature from the cooling water heat exchanger – 85°C, 95°C
TI0420: Oxygen temperature – 25°C
II. Pressure
PIC0401A: Pressure in the fuel gas main pipe – 0.3 MPa
PIC0401B: Pressure in the vent gas main pipe – 0.3 MPa
PI0402: Pressure of coke oven gas – 2.1 MPa
PICA0403: Oxygen pressure – 2.42 MPa, 2.65 MPa
PICA0404: Pressure in the medium-pressure steam main pipe – 3.9 MPa
PI0405: Pressure of steam-oxygen mixture – ~2.2 MPa
PI0406: Pressure of steam-coke mixture – ~2.0 MPa
PI0409AB: Pressure in the waste boiler drum of the conversion gas – 3.9 MPa, 4.1 MPa
PIC0410AB: Pressure of conversion gas – 1.7 MPa
PIA0415: Pressure of make-up cooling water – 5.4 MPa
PI0417: Pressure in the flue gas drum – 3.9 MPa
PI0418: Fuel pressure for the heating furnace – 0.2 MPa, 0.05 MPa
III. Level
LICA0401: Level of the vapor-water separation tank – 25%, 50%
LICA0402AB: Level in the flue gas drum – 50%, 75%, 25%
LICA0403AB: Level in the conversion gas drum – 50%, 75%, 25%
LICA0404: Level of the gas-liquid separator – 25%, 50%, 5%
LICA0405: Level in the stripping tower – 50%, 75%, 25%
LICA0406: Level in the cooling water buffer tank – 50%, 80%, 25%
IV. Flow Rate
FRC0401: Flow rate of coke oven gas – 19,767 Nm3/h
FRC0402: Flow rate of oxygen – 5,021 Nm3/h
FRC0403: Flow rate of process steam – 16,415 Kg/h
FRC0404: Flow rate of steam in oxygen – 2,461 Kg/h
FRC0405: Flow rate of steam for protective burners – 3,000 Kg/h
FR0406: Flow rate of fuel for the coke oven gas heating furnace – 1,562 Nm3/h
FR0407: Flow rate of fuel for the superheated steam heating chamber of the integrated heating furnace – 1,365 Nm3/h
FR0408: Flow rate of fuel for the steam-coke preheating chamber and steam-coke heating chamber of the integrated heating furnace – 1,207 Nm3/h
FRC0409: Flow rate of superheated steam – 15,638 Kg/h
FRC0410: Steam demand in the stripping tower – 8,000 Kg/h
FRQ0411: Steam generated by the flue gas waste boiler – 3,532 Kg/h
FRQ0412: Steam generated by the conversion gas waste boiler – 26,533 Kg/h
FRQ0413: Flow rate of demineralized water – 40,287 Kg/h
FRSA0415: Flow rate of coolant water for burners – 20 m3/h
I. Temperature
TIC0401: Temperature of refined desulfurized coke oven gas – 200~380°C
TI0402: Temperature of raw coke oven gas – 250~380°C
TIC0403: Outlet temperature of superheated steam – 450°C
TIC0404: Temperature of steam-coke mixture – 650°C
TICA0405: Temperature of the water jacket in the oxygen conversion furnace – 90°C, 100°C
TRA0406: Upper temperature in the oxygen conversion furnace – <1450°C, 1450°C
TRSA0407: Temperature in the protection section of the oxygen conversion furnace – <1300°C, 1300°C
TRA0408: Catalyst temperature in the oxygen conversion furnace – ~1200°C, 1250°C
TRCA0410: Outlet temperature of the oxygen conversion furnace – 980°C, 1000°C
TIA0419: Water outlet temperature from the cooling water heat exchanger – 85°C, 95°C
TI0420: Oxygen temperature – 25°C
II. Pressure
PIC0401A: Pressure in the fuel gas main pipe – 0.3 MPa
PIC0401B: Pressure in the vent gas main pipe – 0.3 MPa
PI0402: Pressure of coke oven gas – 2.1 MPa
PICA0403: Oxygen pressure – 2.42 MPa, 2.65 MPa
PICA0404: Pressure in the medium-pressure steam main pipe – 3.9 MPa
PI0405: Pressure of steam-oxygen mixture – ~2.2 MPa
PI0406: Pressure of steam-coke mixture – ~2.0 MPa
PI0409AB: Pressure in the waste boiler drum of the conversion gas – 3.9 MPa, 4.1 MPa
PIC0410AB: Pressure of conversion gas – 1.7 MPa
PIA0415: Pressure of make-up cooling water – 5.4 MPa
PI0417: Pressure in the flue gas drum – 3.9 MPa
PI0418: Fuel pressure for the heating furnace – 0.2 MPa, 0.05 MPa
III. Level
LICA0401: Level of the vapor-water separation tank – 25%, 50%
LICA0402AB: Level in the flue gas drum – 50%, 75%, 25%
LICA0403AB: Level in the conversion gas drum – 50%, 75%, 25%
LICA0404: Level of the gas-liquid separator – 25%, 50%, 5%
LICA0405: Level in the stripping tower – 50%, 75%, 25%
LICA0406: Level in the cooling water buffer tank – 50%, 80%, 25%
IV. Flow Rate
FRC0401: Flow rate of coke oven gas – 19,767 Nm3/h
FRC0402: Flow rate of oxygen – 5,021 Nm3/h
FRC0403: Flow rate of process steam – 16,415 Kg/h
FRC0404: Flow rate of steam in oxygen – 2,461 Kg/h
FRC0405: Flow rate of steam for protective burners – 3,000 Kg/h
FR0406: Flow rate of fuel for the coke oven gas heating furnace – 1,562 Nm3/h
FR0407: Flow rate of fuel for the superheated steam heating chamber of the integrated heating furnace – 1,365 Nm3/h
FR0408: Flow rate of fuel for the steam-coke preheating chamber and steam-coke heating chamber of the integrated heating furnace – 1,207 Nm3/h
FRC0409: Flow rate of superheated steam – 15,638 Kg/h
FRC0410: Steam demand in the stripping tower – 8,000 Kg/h
FRQ0411: Steam generated by the flue gas waste boiler – 3,532 Kg/h
FRQ0412: Steam generated by the conversion gas waste boiler – 26,533 Kg/h
FRQ0413: Flow rate of demineralized water – 40,287 Kg/h
FRSA0415: Flow rate of coolant water for burners – 20 m3/h