MindMap Gallery Fuel Mind Map
A mind map about fuel, including the chemical composition and properties of fuel, fuel component analysis benchmarks and conversions, some properties of fuel, etc.
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Green dreams
Working principle of fuel cell
Substitution method for fuel additive preparation
Substitution preparation of fuel cell catalyst
Combustion reactions and fuels
Combustion efficiency of fuel
cost-breakdown-structure-template-11-web-1736093892968
2. Fuel
1. Chemical composition and properties of fuel
①Definition
②How to determine the composition of coal
industrial analysis
M,A,V,FC
elemental analysis
C,H,O,N,S
Content, calorific value, form, age influence on it, its influence on combustion
2. Fuel composition analysis standards and conversions
① Fuel composition analysis standards
Apply base y - receive base ar
Calculate the combination of all components in the coal based on the coal in the as-received state
① Raw coal entering the factory or coal in front of the furnace
② Boiler design and verification
Cₐᵣ Hₐᵣ Nₐᵣ Sₐᵣ Aₐᵣ Oₐᵣ Mₐᵣ=100%
Analytical basis f - air drying basis ad
Based on coal reaching equilibrium with air temperature (losing external moisture)
①Analysis and testing
② Natural drying and loss of external moisture
Cᵃᵈ Hᵃᵈ Oᵃᵈ Nᵃᵈ Sᵃᵈ Aᵃᵈ Mᵃᵈ=100%
Dry basis g——dry basis d
Hypothetical coal in anhydrous state (lost internal moisture)
Cᵈ Hᵈ Oᵈ Nᵈ Sᵈ Aᵈ=100%
Combustible base r - dry ashless base daf
Assuming no water and no ash
Cᵈᵃᶠ Hᵈᵃᶠ Oᵈᵃᶠ Nᵈᵃᶠ Sᵈᵃᶠ=100%
②Conversion between standards
X=X₀K (conversion coefficient K, P16)
3. Certain properties of fuel
①Volatile component Vᵈᵃᶠ
Carbonization degree ↑, Vᵈᵃᶠ↑, flammable
②Coke
=AF
③Calorific value of coal
definition
calorific value
High Qₐᵣ,ᵍʳ, including the heat released when water vapor in the flue gas condenses
Low Qₐᵣ,ₙₑₜ, not included
High and low bit conversion
same benchmark
different benchmarks
Standard coal and coal conversion components
Standard coal 29310
Converted to 4190
④The nature and hazards of ash
nature
Meltability
Factors affecting melting point
chemical composition
environment
Ash content
Characterization
characteristic temperature
Deformation temperature DT
Softening temperature ST
Melting temperature FT
Formation process
original shape
deformation
soften
hemisphere
liquefaction
Sinterability
harm
Heat transfer efficiency↓
polluted environment
Not easy to burn
Power consumption↑
Melting causes slagging
4. Classification of coal
①Classification
According to daf
②Characteristics of various coal qualities
Anthracite Vᵈᵃᶠ<10%
High calorific value, not easy to slag and not easy to burn
Lean coal 10-20%
Not flammable and not prone to slagging
Bituminous coal 20-40%
Flammable, weak slagging
Lignite>40%
Flammable, low calorific value, easy to dry, brittle
Peat 70%
Flammable, low calorific value