EN 12952-9:2022
(Main)Water-tube boilers and auxiliary installations - Part 9: Requirements for firing systems for pulverized solid fuels for the boiler
Water-tube boilers and auxiliary installations - Part 9: Requirements for firing systems for pulverized solid fuels for the boiler
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.
Wasserrohrkessel und Anlagenkomponenten - Teil 9: Anforderungen an Staubfeuerungsanlagen für den Kessel
1.1 Feuerungsanlagen
Das Dokument gilt für Kohlenstaubfeuerungen an Dampf- und Heißwassererzeugern (Dampfkessel). Es umfasst Beschickungseinrichtungen für die Brennstoffbunker oder für die Kohlenstaub-Lagerungsanlage bis hin zu Entaschungsanlagen. Bei Mehrstoff-Feuerungen mit getrennten oder Kombinationsbrennern gelten diese Anforderungen für den entsprechenden Kohlenstaubfeuerungsteil. Für andere in Kombination eingesetzte Brennstoffe oder Feuerungsanlagen gelten andere Anforderungen, z. B. EN 12952 8:2022.
1.2 Brennstoffe
Diese Anforderungen behandeln Brennstoffstäube (z. B. Koks, Anthrazit, Steinkohle, Braunkohle, Petrolkoks, Ölschiefer und Biomassestaub) mit niedrigem bis hohem Gehalt an flüchtigen Bestandteilen.
1.3 Betrieb
Die Anforderungen für Betriebseinrichtungen gelten für Dampfkessel und Heißwassererzeuger mit ständiger Beaufsichtigung durch entsprechend ausgebildete Personen.
Da Kohlenstaubfeuerungsanlagen als Anlagen mit Direktfeuerung oder indirekter Feuerung ausgelegt sein können, ist zwischen den betrieblichen Anforderungen zu unterscheiden. Anhang A enthält die betrieblichen Anforderungen für Feuerungsanlagen einschließlich der Mahlanlage.
Chaudières à tubes d’eau et installations auxiliaires - Partie 9: Exigences pour les équipements de chauffe pour combustibles solides de la chaudière
1.1 Équipements de chauffe
Le présent document s'applique aux équipements de chauffe pour combustibles pulvérisés de générateurs de vapeur et d'eau surchauffée et commence aux appareils d’alimentation des trémies de stockage des combustibles de la chaudière ou du système de stockage des combustibles pulvérisés et se termine avec l'installation d'extraction des cendres. En ce qui concerne les équipements de chauffe polycombustibles utilisant des brûleurs séparés ou combinés, ces prescriptions s'appliquent à l'élément de chauffe pour combustibles pulvérisés impliqué. Pour d'autres combustibles ou équipements de chauffe utilisés conjointement, d'autres exigences doivent s'appliquer, par exemple l’EN 12952 8:2022.
1.2 Combustibles
Ces prescriptions couvrent l'utilisation de combustibles pulvérisés (par exemple, le coke, l'anthracite, le charbon bitumineux ou la houille, la lignite ou « brown coal », le coke de pétrole, le schiste bitumineux et biomasse pulvérisée) dont la teneur en matière volatile s'étend de faible à forte.
1.3 Mode opératoire
Les exigences relatives aux équipements d'exploitation s'appliquent aux générateurs de vapeur et d'eau surchauffée sous surveillance permanente par du personnel disposant d'une formation appropriée.
Du fait que les équipements de chauffe peuvent être conçus à chauffe directe ou indirecte, les exigences opérationnelles sont à différencier. L'annexe A résume les exigences opérationnelles pour les équipements de chauffe y compris les systèmes de pulvérisation.
Vodocevni kotli in pomožne napeljave - 9. del: Zahteve za gorilnike kotlov na prašnata goriva
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-december-2022
Nadomešča:
SIST EN 12952-9:2003
Vodocevni kotli in pomožne napeljave - 9. del: Zahteve za gorilnike kotlov na
prašnata goriva
Water-tube boilers and auxiliary installations - Part 9: Requirements for firing systems for
pulverized solid fuels for the boiler
Wasserrohrkessel und Anlagenkomponenten - Teil 9: Anforderungen an
Staubfeuerungsanlagen für den Kessel
Chaudières à tubes d’eau et installations auxiliaires - Partie 9: Exigences pour les
équipements de chauffe pour combustibles solides de la chaudière
Ta slovenski standard je istoveten z: EN 12952-9:2022
ICS:
27.060.30 Grelniki vode in prenosniki Boilers and heat exchangers
toplote
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EN 12952-9
EUROPEAN STANDARD
NORME EUROPÉENNE
October 2022
EUROPÄISCHE NORM
ICS 27.040 Supersedes EN 12952-9:2002
English Version
Water-tube boilers and auxiliary installations - Part 9:
Requirements for firing systems for pulverized solid fuels
for the boiler
Chaudières à tubes d'eau et installations auxiliaires - Wasserrohrkessel und Anlagenkomponenten - Teil 9:
Partie 9: Exigences pour les équipements de chauffe Anforderungen an Staubfeuerungsanlagen für den
pour combustibles solides de la chaudière Kessel
This European Standard was approved by CEN on 15 August 2022.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2022 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 12952-9:2022 E
worldwide for CEN national Members.
Contents Page
European foreword . 4
1 Scope . 6
1.1 Firing systems . 6
1.2 Fuels . 6
1.3 Operation . 6
2 Normative references . 6
3 Terms and definitions . 7
4 Fuel bunkers and conveying plant . 11
4.1 General. 11
4.2 Conveying plant . 11
4.3 Solid fuel bunkers . 11
5 Pulverizing system and pulverized fuel system . 12
5.1 Introduction . 12
5.2 Solid fuel feeders . 12
5.3 Mills . 12
5.4 Pulverized fuel bins . 13
5.5 Pulverized fuel supply pipes and shut-off devices . 13
6 Explosion prevention measures for pulverizing systems and pulverized fuel systems
................................................................................................................................................................... 14
6.1 General. 14
6.2 Plants operated without inert gas protection . 15
6.3 Plants operated with inert gas protection . 15
7 Equipment for air supply and flue gas discharge . 16
7.1 Air supply . 16
7.2 Air/fuel ratio . 17
7.3 Flue gas discharge . 17
8 Firing system . 17
8.1 General. 17
8.2 Burners for pulverized fuel . 18
8.3 Flue gas recirculation . 18
8.4 Monitoring and control . 18
8.5 Electrical equipment. 19
8.6 Safety precautions . 19
8.6.1 Purging of the flue gas passes and lighting-up . 19
8.6.2 Start-up . 20
8.6.3 Operation . 20
8.6.4 Shutting down of direct-firing systems . 20
8.6.5 Shutting down of indirect-firing systems . 22
9 Ash extraction plant . 23
10 Operation and maintenance . 23
10.1 General. 23
10.2 Operating instructions . 23
Annex A (informative) Operational requirements for permanently supervised firing system
for pulverized fuel . 24
A.1 General . 24
A.2 Operation . 24
A.3 Mills . 24
A.4 Air/fuel ratio . 24
A.5 Firing system . 24
A.5.1 Combustion residues . 24
A.5.2 Modification of the firing system setting . 24
A.5.3 Safety precautions . 24
A.5.4 Operation . 25
A.6 Operating and maintenance . 25
Annex B (informative) Significant technical changes between this document and the
previous edition . 26
Annex ZA (informative) Relationship between this European Standard and the essential
requirements of Directive 2014/68/EU aimed to be covered . 27
Bibliography . 28
European foreword
This document (EN 12952-9:2022) has been prepared by Technical Committee CEN/TC 269 “Shell and
water-tube boilers”, the secretariat of which is held by DIN.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by April 2023, and conflicting national standards shall be
withdrawn at the latest by April 2023.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN 12952-9:2002.
The technical modifications in comparison with the previous edition are listed in Annex B.
The EN 12952 series concerning water-tube boilers and auxiliary installations consists of the following
parts:
• Part 1: General;
• Part 2: Materials for pressure parts of boilers and accessories;
• Part 3: Design and calculation for pressure parts;
• Part 4: In-service boiler life expectancy calculations;
• Part 5: Workmanship and construction of pressure parts of the boiler;
• Part 6: Inspection during construction, documentation and marking of pressure parts of the boiler;
• Part 7: Requirements for equipment for the boiler;
• Part 8: Requirements for firing systems for liquid and gaseous fuels for the boiler;
• Part 9: Requirements for firing systems for pulverized solid fuels for the boiler;
• Part 10: Requirements for safeguards against excessive pressure;
• Part 11: Requirements for limiting devices of the boiler and accessories;
• Part 12: Requirements for boiler feedwater and boiler water quality;
• Part 13: Requirements for flue gas cleaning systems;
• Part 14: Requirements for flue gas DENOX systems using liquefied pressurized ammonia and ammonia
water solution;
• Part 15: Acceptance tests;
• Part 16: Requirements for grate and fluidized-bed firing systems for solid fuels for the boiler;
• CR 12952 Part 17: Guideline for the involvement of an inspection body independent of the
manufacturer.
• Part 18: Operating instructions
Although these parts can be obtained separately, it should be recognized that the parts are inter-
dependent. As such, the design and manufacture of water-tube boilers requires the application of more
than one part in order for the requirements of the document to be satisfactorily fulfilled.
This document has been prepared under a Standardization Request given to CEN by the European
Commission and the European Free Trade Association, and supports essential requirements of EU
Directive(s) / Regulation(s).
For relationship with EU Directive(s) / Regulation(s), see informative Annex ZA, which is an integral part
of this document.
Any feedback and questions on this document should be directe
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