This standard specifies the guiding rules for the type and parameter selection of pulverizer and pulverizing system in power stations.
This standard is applicable to high, medium and low speed pulverizers and corresponding pulverizing systems used in power stations.
This Standard is applicable to condensing thermal power plants with a unit capacity of 100MW~ 600MW and thermal units with a unit capacity of 50MW or above. It may apply the units of over 600MW by reference.
1 Scope 1
2 Normative References 1
3 Terms and Definitions 2
4 Characters of Coal and Pulverized Coal 6
4.1 Gridability of Coal 6
4.2 Abrasiveness of Coal 7
4.3 Coal Caking Character 8
4.4 Explosivity of Pulverized Coal 8
4.5 Fineness of Pulverized Coal 9
4.6 Moisture of Coal and Pulverized Coal 11
4.7 Ignitability and Burn-out of Pulverized Coal 12
5 Initial Design Data 13
6 Type and Performance of Pulverizers 14
6.1 Low Speed Pulverizer 14
6.2 Medium Speed Pulverizer 17
6.3 High Speed Pulverizer 23
6.4 Comprehensive Comparison of Performances of Pulverizers 27
7 Type and Performance of Pulverizing Systems 3
7.1 Hot-Blast Pulverizing System of Intermediate-Warehoused Steel Ball Pulverizer 3
7.2 Exhausted-Air-Feeding Pulverizing System of Intermediate-Warehoused Steel Ball Pulverizer 7
7.3 Direct-Firing Pulverizing System of Medium Speed Pulverizer 7
7.4 Direct-Firing System of Double-In Double-Out Steel Ball Pulverizer 9
7.5 Direct-Firing Pulverizing System of Fan Pulverizer 10
7.6 Smoke Drying Of Intermediate-Warehoused Hot Boiler, Hot Blast Feeding Closed-And Open-Systems 12
7.7 Semi-Direct-Firing Pulverizing System Of Double-In Double-Out Steel Ball Pulverizer 14
7.8 Comprehensive Comparison of Various Pulverizing Systems in Performances 14
8 Explosion-Proof Design of Pulverizing System 16
9 Selection of Pulverizer and Pulverizing System 18
9.1 Selection Principles 18
9.2 Pulverizer and Pulverizing System Type Recommended For Different Coal Properties 18
Appendix A (Informative) Determination of Maximum Molecular Water and Maximum Capillary Water 22
Appendix B (Informative) Determination of External Friction Angle, Internal Friction Angle and Collective Angle 23
Appendix C (Informative) Fire Coal Explosivity Index of Power Plants in China 25
Appendix D (Normative) Conversion Of Basis In Coal Analysis 27
Appendix E (Informative) Parameter Of Steel Ball Pulverizer Series 29
Appendix F (Informative) Parameter Of Double-In Double-Out Steel Ball Pulverizer Series 30
Appendix G (Informative) Parameter Of RP (HP) Pulverizer Series 32
Appendix H (Informative) Parameter Of MPS Pulverizer Series 33
Appendix I (Informative) Performance Parameter Of MP And ZGM Pulverizer Series 34
Appendix J (Informative) Parameter Of E Pulverizer Series 37
Appendix K (Informative) Parameter Of Fan Pulverizer Series 1
