DL/T 5240-2010 in English

1 Scope

This standard specifies the design and calculation methods for the boiler combustion system of fossil-fired power plant.
This standard is applicable to the design and calculation of 65t/h~3000t/h pulverized coal fired boiler combustion system.
The circulating fluidized bed (CFB) boiler, oil-fired boiler and gas-fired boiler may refer to the relevant parts of this standard.

2 Normative References

The following normative documents contain provisions which, through reference in this standard, constitute provisions of this standard. For dated reference, subsequent amendments (excluding amending errors) to, or revisions of, any of these publications do not apply. However, all parties coming to an agreement according to this standard are encouraged to study whether the latest editions of these documents are applicable. For undated references, the latest edition of the normative document referred to applies.

Contents
Introduction I
1 Scope
2 Normative References
3 Terms, Definitions and Symbols
3.1 Terminology and Definitions
3.2 Symbols
4 General Provisions
5 Information on Coal Type and Coal Quality
5.1 Design Coal and Check Coal
5.2 Coal Quality Analysis Items
5.3 Examination and Confirmation of Coal Quality Analysis Data
5.4 Limestone/Lime Analysis Information
6 Assessment of Coal Quality Grade
6.1 Grade of Coal Type and Coal Quality
6.2 Assessment Index of Coal Quality Characteristics
7 Selection of Air-flue Gas System of Boiler Unit
7.1 Air-Flue Gas System of Boiler
7.2 Inlet Air Heating System of Air Heater
7.3 Clean Loop Flue Gas Exhaust System
8 Heat Calculation for Combustion System
8.1 General Requirements
8.2 Original Data
8.3 Boiler Gross Efficiency
8.4 Calculation of Fuel Consumption
8.5 Calculation for Flue Gas and Air Volume Generated by Combustion of 1 kg Coal and Exhaust Gas Composition
8.6 Temperature and Pressure of Flue Gas and Air Medium
8.7 Air Volume Balance Balance and Air Volume Coordination for Combustion System
8.8 Calculation of Integral Flue Gas and Air Volume for Boiler Unit
8.9 Calculation of Dew Point Temperature of Flue Gas and Air
8.10 Calculation of Carbon Dioxide Emission
9 Calculation for Flue Gas and Heat of the Flue Gas Purification System
9.1 Calculation for Flue Gas of Dry Dust Removal System
9.2 Calculation for Flue Gas and Heat of Purification System with Wet or Semi-dry Methods
9.3 Heat Calculation for Wet Desulphurization System
9.4 Calculation for Thermal Performance for Humidified Flue Gas
9.5 Calculation for Stack Temperature Drop
10 Heat Calculation for Inlet Air Heating System of Air heater
10.1 General Requirements
10.2 Heat Calculation for Recycling Heating System of Hot Air
10.3 Heat Calculation for Heating System of Steam Air Heater
11 Aerodynamic Calculation for Combustion System
11.1 General Requirements
11.2 Design Optimization for Flow Passage Part of Air-Flue Gas Duct
11.3 Selections for Medium Flow Rate in Combustion System Pipeline
11.4 Friction Resistance of Air-Flue Gas Duct
11.5 Local Resistance of Air-Flue Gas Duct
11.6 Requirements on Simplified Calculation for Air-Flue Gas Duct Resistance
11.7 Equipment Resistance
11.8 Self-generated Ventilation
11.9 Stack Resistance
11.10 Systemic Calculated Resistance and Its Correction
12 Selection of Fans in the Combustion System
12.1 Selection of Fan Type, Quantity, Air and Head
12.2 Selection for Fan Rotation Speed
12.3 Calculation for Fan Test block
12.4 Selection for Type and Dimension of Fan
12.5 Selection of Drive Mode and Regulation Mode for Fan
12.6 Determination of Fan Motor Power
13 Selection of Dust Remover
13.1 General Requirements
13.2 Electrostatic Dust Remover
13.3 Bag-type Dust Remover
14 Stack Selection and Selection Design and Calculation
14.1 General Requirements
14.2 Selection of Stack Number, Height and Inside Diameter of Outlet
14.3 Determination Method for Upper Limit Value of Flow rate for Stack Outlet
14.4 Distribution Characteristics for Static Pressure in Stack Smoke-Discharge Cylinder
14.5 Test block Design for Wet Stack
15 Safety Supervision and Protection System as well as Explosion and Fire Protection of Combustion System
15.1 General Requirements
15.2 Explosion-proof Design Pressure of Furnace
15.3 Anti-explosion Design Pressure for Air-Flue Gas System
15.4 Arrangement of Explosion Door for Furnace and Tail
15.5 Anti-Ignition Measures for Rotary Air Heater and Tail Flue
15.6 Safety Explosion Precautions for Plasma Ignition Device
Appendix A (Normative) Symbols
Appendix B (Normative) Methods for Heat Calculation of Combustion System in Desulfurization with Limestone Added in the Boiler
Appendix C (Informative) References for Design and Calculation of Combustion System
Appendix D (Normative) Selection Optimization for the Flow Passage Components of Air-flue Gas Duct
Appendix E (Normative) Analysis Methods for Boiler Unit Coal Consumption and Boiler Thermal Parameters during the Air Inlet Temperature Increase of Air Heater
Appendix F (Informative) Aerodynamic Characteristic Examination for the Vibration Protection and Noise Reduction of Air-Flue Gas System