EN 12952-16:2022

Water-tube boilers and auxiliary installations - Part 16: Requirements for grate and fluidized-bed firing systems for solid fuels for the boiler

EN 12952-16:2022

Name:EN 12952-16:2022   Standard name:Water-tube boilers and auxiliary installations - Part 16: Requirements for grate and fluidized-bed firing systems for solid fuels for the boiler
Standard number:EN 12952-16:2022   language:English language
Release Date:18-Oct-2022   technical committee:CEN/TC 269 - Shell and water tube boilers
Drafting committee:CEN/TC 269/WG 1 - Water-tube boilers   ICS number:27.040 - Gas and steam turbines. Steam engines

SLOVENSKI STANDARD
01-december-2022
Nadomešča:
SIST EN 12952-16:2003
Vodocevni kotli in pomožne napeljave - 16. del: Zahteve za kurilne sisteme na
trdna goriva z zgorevalno rešetko ali z lebdečo plastjo
Water-tube boilers and auxiliary installations - Part 16: Requirements for grate and
fluidized-bed firing systems for solid fuels for the boiler
Wasserrohrkessel und Anlagenkomponenten - Teil 16: Anforderungen an Rost- und
Wirbelschichtfeuerungsanlagen für feste Brennstoffe für den Kessel
Chaudières à tubes d’eau et installations auxiliaires - Partie 16: Exigences pour les
équipements de chauffe à lit fluidisé pour combustibles solides
Ta slovenski standard je istoveten z: EN 12952-16:2022
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 12952-16
EUROPEAN STANDARD
NORME EUROPÉENNE
October 2022
EUROPÄISCHE NORM
ICS 27.040 Supersedes EN 12952-16:2002
English Version
Water-tube boilers and auxiliary installations - Part 16:
Requirements for grate and fluidized-bed firing systems
for solid fuels for the boiler
Chaudières à tubes d'eau et installations auxiliaires - Wasserrohrkessel und Anlagenkomponenten - Teil 16:
Partie 16: Exigences pour les équipements de chauffe à Anforderungen an Rost- und
lit fluidisé pour combustibles solides Wirbelschichtfeuerungsanlagen für feste Brennstoffe
für den 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 12952-16:2022 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 . 7
3 Terms and definitions . 7
4 Fuel storage facilities with conveying plant . 9
4.1 General. 9
4.2 Conveying plant . 10
4.3 Fuel bunkers . 10
4.4 Fuel bins . 11
5 Fuel treatment . 11
5.1 General. 11
5.2 Size reduction of the fuel . 11
5.3 Drying of the fuel . 12
6 Fuel feeding . 12
7 Explosion prevention measures . 13
Table 1 — Overview of important prevention measures for different operational areas . 13
8 Equipment for combustion air supply and flue gas discharge . 13
8.1 Air supply . 13
8.2 Combustion air/fuel ratio . 14
8.3 Flue gas discharge . 14
9 Firing system . 15
9.1 General. 15
9.2 Monitoring and control . 15
9.3 Electrical equipment. 16
9.4 Safety precautions . 16
9.4.1 General. 16
9.4.2 Purging . 16
9.4.3 Lighting-up . 17
9.4.4 Start-up . 17
9.4.5 Shutting down . 18
9.5 Common stack for several firing systems . 18
10 Ash handling and extraction . 19
11 Operating manual . 19
Annex A (informative) Operational requirements for permanently supervised firing systems
for solid fuels for fluidized-bed and grate firing systems . 20
A.1 General. 20
A.2 Operation . 20
A.3 Operation and maintenance . 20
A.3.1 General . 20
A.3.2 Operating instructions . 20
Annex B (informative) Significant technical changes between this European Standard and
the previous edition . 21
Annex ZA (informative) Relationship between this European Standard and the essential
requirements of EU Directive 2014/68/EU aimed to be covered . 22
Table ZA.1 — Correspondence between this European Standard and Directive 2014/68/EU
................................................................................................................................................................... 22
Bibliography . 23
European foreword
This document (EN 12952-16:2022) 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 12952-16:2002.
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 directed to the users’ national standards body.
A complete listing of these bodies can be found on the CEN website.
According to the CEN-CENELEC Internal Regulations, the national standards organisations of the
following countries are bound to implement this European Standard: 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 the United
Kingdom.
1 Scope
1.1 Firing systems
This document applies to atmospheric fluidized-bed and grate firing systems of steam boilers and hot
water generators. These systems commence at the fuel bunkers and end at the ash extraction plant. For
combination of various firing systems, the individual requirements of each system apply, especially those
included in EN 12952-8:2022 and EN 12952-9:2022.
If several fuels are burnt simultaneously or if a fuel quality varies considerably (e.g
...

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