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BS EN 12952-9:2022

BS EN 12952-9:2022

$167.15

Water-tube boilers and auxiliary installations – Requirements for firing systems for pulverized solid fuels for the boiler

Published By Publication Date Number of Pages
BSI 2022 34
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1.1 Firing systems This document applies to pulverized fuel firing systems of steam boilers and hot water generators and commences at the filling equipment for the boiler bunkers or for the pulverized fuel storage system and ends at the ash extraction plant. For multifuel firing systems using separate or combined burners, these requirements apply to the pulverized fuel firing part involved. For other fuels or firing systems used in combination, other requirements apply, e.g. EN 12952-8:2022. 1.2 Fuels These requirements cover the use of pulverized fuels (e.g. coke, anthracite, bituminous coal or hard coal, lignite or brown coal, petrol coke, oil shale and pulverized bio mass) ranging from low to high volatile matter content. 1.3 Operation Requirements for operational equipment apply for steam boilers and hot water generators with permanent supervision by properly trained persons. As firing systems using pulverized fuel can be designed either as direct-firing or as indirect-firing systems, operational requirements have to be differentiated. Annex A summarizes the operational requirements for firing systems including the pulverizing system.

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PDF Pages PDF Title
2 undefined
8 European foreword
10 1 Scope
1.1 Firing systems
1.2 Fuels
1.3 Operation
2 Normative references
11 3 Terms and definitions
15 4 Fuel bunkers and conveying plant
4.1 General
4.2 Conveying plant
4.3 Solid fuel bunkers
16 5 Pulverizing system and pulverized fuel system
5.1 Introduction
5.2 Solid fuel feeders
5.3 Mills
17 5.4 Pulverized fuel bins
5.5 Pulverized fuel supply pipes and shut-off devices
18 6 Explosion prevention measures for pulverizing systems and pulverized fuel systems
6.1 General
19 6.2 Plants operated without inert gas protection
6.3 Plants operated with inert gas protection
20 7 Equipment for air supply and flue gas discharge
7.1 Air supply
21 7.2 Air/fuel ratio
7.3 Flue gas discharge
8 Firing system
8.1 General
22 8.2 Burners for pulverized fuel
8.3 Flue gas recirculation
8.4 Monitoring and control
23 8.5 Electrical equipment
8.6 Safety precautions
8.6.1 Purging of the flue gas passes and lighting-up
24 8.6.2 Start-up
8.6.3 Operation
8.6.4 Shutting down of direct-firing systems
8.6.4.1 General
25 8.6.4.2 Scheduled outage (normal shutdown)
8.6.4.3 Quick cut-out
8.6.4.4 Emergency shutdown (lock-out)
26 8.6.5 Shutting down of indirect-firing systems
27 9 Ash extraction plant
10 Operation and maintenance
10.1 General
10.2 Operating instructions
28 Annex A (informative) Operational requirements for permanently supervised firing system for pulverized fuel
A.1 General
A.2 Operation
A.3 Mills
A.4 Air/fuel ratio
A.5 Firing system
A.5.1 Combustion residues
A.5.2 Modification of the firing system setting
A.5.3 Safety precautions
29 A.5.4 Operation
A.6 Operating and maintenance
30 Annex B (informative) Significant technical changes between this document and the previous edition
31 Annex ZA (informative) Relationship between this European Standard and the essential requirements of Directive 2014/68/EU aimed to be covered
Table ZA.1 — Correspondence between this European Standard and Directive 2014/68/EU
32 Bibliography

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BS EN 12952-9:2022
$167.15