Gasification cold gas efficiency
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Asking for advice from everyone: 1. What is the meaning of cold gas efficiency? 2. What is the use of studying the efficiency of cold gas? 3. Authoritative cold gas efficiency data of Lurgi, BGL fixed bed, fluidized bed such as Ende, Winkler, Huifengju, etc., Texaco, shell, GSP and other coal gasification technologies. Thank you!
Cold gas efficiency = calorific value of gas/calorific value of coal. The main purpose of studying the cold gas efficiency is to understand how much of the chemical energy of coal is converted into the chemical energy of gas.
Cold gas efficiency (gasification efficiency) = high calorific value of gas/high calorific value of raw coal × 100%
Cold gas efficiency and hot gas efficiency are important indicators to measure the performance of the gasifier. The cold gas efficiency ηl is defined as the ratio of the chemical energy of the gas produced by gasification to the chemical energy of the coal used for gasification. The chemical energy of gas and coal can be calculated using the corresponding low calorific value. Obviously, improving the cold gas efficiency of the gasifier means converting more of the chemical energy contained in the coal into the chemical energy of the gas, which is conducive to improving the power supply efficiency of the circulation system.
Do the cold and hot gas efficiencies have different requirements for gas used in city gas, gas turbines, and synthetic ammonia?
reply: 1. Cold gas efficiency: Cold gas efficiency is defined as the ratio of the chemical energy of generated gas to the chemical energy of gasification coal. 2. Hot gas efficiency: Thermal gas efficiency is defined as the ratio of the sum of the chemical energy of generated gas and the enthalpy increment of steam generated in the gasifier and the hot gas sensible heat utilization system to the chemical energy of the gasification coal. The enthalpy value increment of steam refers to the difference between the enthalpy value of the steam generated in the sensible heat utilization system and the enthalpy value of the feed water. 3. Approximate cold gas efficiency of several gasifiers·SHELL pulverized coal gasification 80-83%·GE coal water slurry 74-77%·Lurgi ~88%·GSP 78-83%
Cold gas efficiency of five technologies known: shell texaco lurgi htw gsp 78-83% 70-76% 65-75% 68-75% 78-83%
Llurgi should be the highest, reaching up to 93%, but other factors should be considered in terms of energy efficiency. For example, the cold gas efficiency of Shell coal gasification reaches 78~83%, and the remaining ~15% by-product is high-pressure or medium-pressure steam. The total thermal efficiency of raw coal reaches 98%.
liutaokill Haichuan Primary School third grade UID52603 Posts 85 Points 30 Prestige 0 points Wealth 30 ￥ Charm 29 points Contribution 0 points Professional reading permission 30 Online time 69 hours Last login 2008-3-14 Send text message in personal space Add as friend Currently offline 2nd floor Large, Medium and Small Published on 2008-3-4 11:14 Just look at the author. Cold gas efficiency = calorific value of gas/calorific value of coal. The main purpose of studying cold gas efficiency is to understand how much of the chemical amount of coal is converted into the chemical energy of gas ===== Correct! !
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