1 Scope
This standard specifies the design and calculation methods of boiler pulverized coal preparation system of fossil-fired power plant.
This standard is applicable to the design and calculation of pulverized coal preparation system of coal-fired boilers with the capacity of 65t/h~2000t/h.
1 Scope
2 Normative References
3 Characteristics of Coal and Pulverized Coal
3.1 Initial Design Data
3.2 Coal Grindability
3.3 Abrasion Characteristic of Coal
3.4 Combustion Characteristic of Coal
3.5 Explosion Characteristic of Pulverized Coal
3.6 Moisture of Coal and Pulverized Coal
3.7 Grain Size of Raw Coal and Dimension of Crushed Coal
3.8 Coal Fineness
3.9 Density of coal and Pulverized Coal
3.10 Average Specific Heat of Coal and Pulverized Coal
4 Type and Selection of Coal Mill and Pulverized Coal Preparation System
4.1 Type of Coal Mill
4.2 Types of Pulverized Coal Preparation Systems
4.3 Selection of Types of Coal Mill and Pulverized Coal Preparation System
5 Calculation of Performance Parameters and Quantity Determination of Coal Mills
5.1 Performance Parameters
5.2 Calculation of Performance Parameters of Steel Ball Mill
5.3 Calculation for Performance Parameter of Wheel (MPS) Mill
5.4 Performance Parameter Calculation fr Bowl Mill (Rp, HP Type)
5.5 Calculation of Performance Parameter for Ball Ring (E Type) Coal Mill
5.6 Calculation of Performance Parameter for Double-inlet & Double-outlet Steel Ball Coal Mill
5.7 Calculation of Performance Parameters of Fan Coal Mill
5.8 Selection of the Coal Mill Quantity and Output Allowance
6 Thermodynamic Calculation of Pulverized Coal Preparation System
6.1 General
6.2 Determination of Initial Desiccant Quantity
6.3 Heat Balance
6.4 Determination of the Initial and Final Temperature of Desiccant
6.5 Specific Heat of Desiccant
6.6 Composition and Share of Desiccant at Initial Section
6.7 State Parameters, Air Share, Dew Point and Oxygen Content of Terminal Desiccant
6.8 Drying Pipe Parameters Calculation
6.9 Drying Output Checking and Pulverized coal Preparation System Fan Capacity
7 Aerodynamic Calculation for Pulverized Coal Preparation System
7.1 General
7.2 Pipeline Frictional Resistance
7.3 Local Resistance of Pipeline Components
7.4 Resistance of Equipment and Components
7.5 Lifting Pressure Head Loss of Pulverized coal
7.6 Acceleration Loss of Coal or Pulverized coal
7.7 Gas Inlet Negative Pressure and Inlet Resistance
7.8 Self-generating Ventilation of Pulverized coal Preparation System
7.9 Total Resistance and Total Pressure Drop of Pulverized coal Preparation System
7.10 Resistance Coefficient Equilibrium of Parallel Pulverized coal Feed Pipeline
7.11 Determination of Fan Calculation Pressure Head of Pulverized coal Preparation System
8 Auxiliary Equipment and Parts for Pulverized coal Preparation System
8.1 Raw Coal Bunker
8.2 Pulverized coal Bunker
8.3 Coal Feeder
8.4 Pulverized coal Feeder
8.5 Pulverized coal Conveyer
8.6 Flap Valve
8.7 Coarse Pulverized coal Separator
8.8 Fine Pulverized coal Separator
8.9 Throttling Element
8.10 Pulverized coal Distributor
8.11 Pulverized coal Mixer
8.12 Wood Block Separator and Wood Scraps Separator
8.13 Fan of Pulverized coal Preparation System
8.14 Compensator
9 Pipeline Arrangement and Others of Pulverized coal Preparation System
9.1 Principle and Requirements for Pipeline Arrangement of Pulverized coal Preparation System
9.2 Raw Coal Pipeline Arrangement
9.3 Arrangement of Pulverizing Pipeline
9.4 Arrangement of Pulverized coal Feed Pipeline
9.5 Technical Measures for Explosion Protection of Pulverized coal Preparation System
9.6 Strength Requirements for Pipeline and Components
9.7 Layout and Positions of Thermal Test Points
10 Symbols
10.1 Subscripts and Their Meanings
10.2 Class Symbols
Appendix A (Normative) Basis Conversion Method for Representing Analysis Result of Coal Quality
Appendix B (Normative) Calculation Method for Theoretical Air Quantity and Fume Quantity and Composition
Appendix C (Informative) Examples of Types of Pulverized coal Preparation Systems
Appendix D (Normative) Parameter Series of Coal Mill
Appendix E (Informative) Calculation Method for Fw Double-Inlet & Double-Outlet Coal Mill
Appendix F (Informative) SVEDALA Design and Selection of Double-Inlet & Double-Outlet Steel Ball Coal Mill (Illustration)
Appendix G (Informative) Nomographs for Parameters of Steel Ball Mill
Appendix H (Informative) Examples for Some Auxiliary Facilities and Components of Pulverized coal Preparation System and Common Properties of Fan
Appendix J (Informative) Partial Physical Parameters of Certain Gases
Appendix K (Normative) Resistance Coefficient of Pure Gas in 90° Symmetrical Tee
Appendix L (Normative) Basic Dimension of Standard Sieve Mesh
