Utility consumption and other issues in the dry quenching system for coke (reward offered)
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Recently, I have been working on some projects related to dry quenching of coke, and I am hoping to get everyone’s help. After reading the opinions expressed by many experts on the forum, there are still some issues that I don’t fully understand. I would like to ask the following: 1. The consumption of utilities for dry quenching of coke (calculated per ton of coke quenched). 1) The amount of nitrogen required to quench each ton of coke, in standard cubic meters per ton of coke. 2) The amount of compressed air required to quench each ton of coke (what is the pressure?) ) Volume: standard cubic meters per ton of coke (excluding instrument air). 3) Amount of instrument air required per ton of coke: standard cubic meters per ton of coke. 4) Amount of desalinated water required per ton of coke: tons per ton of coke. 5) Electricity consumption per ton of coke: kwh per ton of coke. 6) Amount of circulating water required per ton of coke: tons per ton of coke; specify where the circulating water is used. Overall consumption figures are also acceptable, but the scale of dry quenching of coke must be indicated. 2. Power generation in dry quenching of coke generally relies on the technology of exhaust gas condensation for power generation; can the amount of exhaust gas and condensed gas drawn by the turbine be adjusted? (The exhaust volume is determined based on the requirements of the coking plant.) 3. If the steam extraction and condensation power generation technology is adopted, and the steam extracted by the turbine meets the needs of the coking plant, will the boiler in the plant’s power department function only as a backup, to be used only during maintenance or when there are failures in the dry quenching process? ? 4. The issue of nitrogen consumption in dry quenching of coke: After the dry quenching furnace is ready for operation, nitrogen is supplied to the circulation system. Is it still necessary to continuously supply nitrogen during normal production? I’ve read some materials stating that air is introduced to burn the combustible gases in the circulation gas (is this equivalent to supplying nitrogen?). That’s all for now; I look forward to expert answers. Thank you very much. This post was last edited by Coking Exchange on 2009-2-20 12:36.]
After production, air is generally used in place of nitrogen, as nitrogen is more expensive than air after all. Nitrogen is used only for sealing certain devices. This post was last edited by Yan Xiangsi on 2009-2-19 at 09:41.]
These are the data from my time studying at a steel plant: Coke discharge volume: 120 t/h; Circulating air volume: 121,481 Nm3/h; Air introduced: 8,218 Nm3/h; Nitrogen injected: 108 Nm3/h; Low-pressure steam volume: 10.48 t/h; Boiler feedwater volume: 76.01 t/h; Water used for temperature reduction: 2.34 t/h; Output main steam volume: 74.91 t/h; Circulating water volume: 550 t/h
Thank you, boss. I have a few questions: 1. Is the low-pressure steam generated by the dry quenching unit, or is it supplied to that unit? 2. Does the amount of water used for temperature reduction refer to the water from the temperature and pressure reduction unit? 3. Does that steel plant have a dry quenching unit coupled with a power generation system?
Low-pressure steam is supplied to the dry quenching unit, where it is used in the thermal deaerator of the water supply system in that unit. The oxygen content in the boiler feed water does not meet the required standards, and prolonged operation poses significant risks to the dry quenching boiler system. The methods for deoxidizing boiler feed water are mainly thermal and chemical methods, with the chemical method serving as a supplementary approach to the thermal method. Thermal deaeration requires the use of low-pressure steam.
The amount of water used for temperature reduction is supplied to the temperature reducer in order to ensure that the temperature of the superheated steam generated by the dry quenching boiler meets the specified requirements.
The steam generated by dry quenching of coke is generally sent to thermal power plants for electricity generation, especially in steel companies. If there are no coking enterprises with thermal power plants, they all use the vacuum condensation power generation technology.
The moderator, please take a look at my question and help me find an answer. I’ve learned a lot from your responses