1、BRITISH STANDARD Guide for procurement of power station equipment - BS EN 455 10-4-6: 1999 Part 4: Boiler auxiliaries - Section 6: Flue gas desulfurization (De-SOx) plant The European Standard EN 4551o-p6:1999 has the status of a British Standard ICS 27.060.30 NO COPYING WITHOUT BSI PERMISSION EXCEP
2、T AS PERMITTED BY COPYRIGHT LAW STD-BSI BS EN 455LO-q-b-ENGL 1779 W 1624bb 0793020 038 I been prepared under the direction of the Engineering Amd. No. Date Sector Committee, was published under the authority of the Standards Committee and comes into effect on 15 September 1999 O BSI 09-1999 ISBN O 5
3、80 32491 5 BS EN 455104-6:1999 Comments National foreword This British Standard is the English language version of EN 45510-441999. The UK participation in its preparation was entrusted to Technical Committee W-/20, Power engineering steering committee, which has the responsibility to: - aid enquire
4、m to understand the text; - present to the responsible European committee any enquiries on the - monitor related international and European developments and promulgate interpretation, or proposals for change, and keep the UK interests informed; them in the UK. A list of organizations represented on
5、this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled “Intrnational Standards Correspondence Index“,
6、 or by using the “Find“ facility of the BSI Standards Ele 27.040; 27.100 English version Guide for procurement of power station equipment - Part 4 Boiler aiUriliaries - Section6 Flue gas desulfwlzat;i onoe3CQpht Guide pour lacquisition dqupements destins aux centdes de production dlectricitk - Parti
7、e 4 Auxiaim de chaudire - Section 6 Installation de dsulfurati ondes fumes Leitfaden fiir die km von Ausnlstungen Rir Kraftwerke - Teil 4 Nebenaniagen - Hauptabschnitt 6 Rauchgasentschwefellungsanlage (DeSo,) (Dso,) This European Standard was approved by CENKENELEC on 1 April 1999. CENKENELEC member
8、s are bound to comply with the CEN/CENELEC Intrnai Reguiations which stipdate the conditions for giving this European Standard the status of a national standarc without any alteration. Upto-date lists and bibliographical references concerning such national standards may be obaine on application to t
9、he Central Secretariat or to any CENKENELEC 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 CENEENELEC member hto its own language and notified to the Cena Secretariat has th
10、e same status as the official versions. CEN/CENELEC members are the national standards bodies and national electrotechnicai committees, respectively, of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norwax Portugal, Spa
11、in, Sweden, Switzerland and United Kingdom. CEN CEN Central Secretariat rue de Stassart, 36 E1050 Brussels CENEKEC CENELEC Centrai Secretariat rue de %assart, 35 B1050 Brussels O 1999 CENXENELEC AU rights of exploitation in any form and by any means reserved worldwide for CEN national Members and fo
12、r CENELEC Members. Ref. No. EN 45510461999 E STD-BSI BS EN 45510-4-b-ENGL 1999 Lb24bb9 0793022 900 M Page 2 EN 455104-6:1999 Foreword This European Standad has been prepared by Technical Committee CENCLC JTPE, Joint llk Force Power Enginewing, the Secretariat of which is This European Standad shau b
13、e given the status of a national standad, either by publication of an identical texi or by endmsement, at the latest by October 1999, and conJ?kting national stam - systems to meet specific flue gas discharge requirements, for example suifur content, dust content and temperature; - mms with and with
14、out marketable by-products; - systems to meet specified waste product discharge limits, - systems to meet limited choice of absorbent type and limitation of water consumption. l!h equipment covered by this guide is define by its function mthm ULan design tgpe. Therefore, the guihnce to the specwcati
15、on is stated in - ancular(/ equipment is properly sized; - reliaility, mailability and safety requirements are achieved; - pmper considemtion is given to the evaluation process and the quality masum to be applied. This guide does not deternaine the type of specification (e.g. detailed, pqfomnce, fun
16、ctional) or the mknt of supply for any gim contract which is mrmig a!mided on the basis of the purchasers pmject stmtegy. It does not cover: - any com-, mtmctual or kgal issues which are normally in strpmte parts of an enquiry; - ana allocation of responsibilities which are This guide does not presc
17、ribe the armngmmt of ULe documents in the enquiry. NOTE As a comprehensive European envimnmen.tal policg is stiU under prepamtion, this gum does not address the environmental implications of the equipment. correctly with other elenlmts of the systems determia by ULe contract. 2 Normative references
18、This guide for procurement incorpomtes by ated or undated reference, provisions fmm other publications. These normative refwmes are cited in the appropriate pluces in the text and the publications a.re listed here. For dated references, subsequent amendments to or revisions of any of these publicati
19、ons apply to this guide only whm incorporated in it by amendment or revision. For undated rejrema, the latest edition of the publication wfmd to applies. EN IS0 9001, QuuLity systems - Model for quality assumnce in design, development, production, installation and serrricing. (Is0 9001:1994) EN IS0
20、9002, Wit9 systems - Model for quality assurance in production, instauation and s is the inlet So, concentratjon; is the outlet SOx concentmiion Page 6 EN 46610-4-6:1999 3.2.10 flue gas booster fan fan which provides additional pressure to pass flue gases through the desulfurizaton piant prior to de
21、livery to the chimney 3.2.11 induced draught fan fan located downstream of the boiler, handling the gas flow and maintajning the required suction pressure in the boiler furnace 3.2.12 damper device in a duct which uses movable blades to regulate the flow of gas. if used as an isolation device its ef
22、fectiveness is defined, when shut-off, in terms of the leakage flow rate expressed as a percentage of the maximum flow rate when the damper is open 3.2.13 turndown ratio of continuous maximum to minimum operatmg condition, for example a turndown ratio of 41 means that the equipment should be capable
23、 of operating from 100% down to %of the flow rate at the continuous maximum operating condition 3.2.14 continuous maximum operating condition maximum conition at which the equipment may be operated for a period not exceeding the specified design life 3.3 general terms 3.3.1 equipment plant, componen
24、t, system ador associated senvice to be provided in re-sponse to the enquirg 3.3.2 corlformity fulfilment of sp - geologicai e.g, seismic conditions and characteristics of subsoil (e.g. cavm, gliding stratifications, loa bearing capabity of subsoils); - geogmphic e.g. elevation, influence of local t
25、opography and structum; - hydrological e.g. Doding and tides. 4.3 Equipment task The specification should describe in genera terms the function, task m rob of the equipment to be purchased, e.g. whether it is pari of a new power generating plant, a modifwation to an existing power generating plant,
26、or replmement equipment. where appropriate, the specification should - the type of preparation of absorbent, on site or off site; - the type of disposal (dry or wet) of by-product or process waste; - the type of motor cooling (water or air). The specification may define any preferences with regard t
27、o the grouping of systems, for example the by-product drymg, storage and handling system may be located separately from the main process plank The specification may also wine pf - auxiliary equipment such as controls, power supplies, cooiing and steamhater systems, etc.; - common services such as li
28、meAhestone handling and storage equipment, by-product treatment, handijing and storage equipment, waste water treatment equipment, etc.; - accessories for handing and maintenance systems; - spare parts such as filter bags, pumps, spray nozzles, rubber tubes, gaskets, valves, etc; - site activities s
29、uch as storage, transport and installation; - commissioning and performance tests; - documentation of equipment or system details, operation and maintenance manuals. Page 7 EN 45610-4-6:1999 If the purchaser wishes to have a contmct for control and instrumtation separate fm the equipment supply cont
30、mct, the specflcaton may rsguire the supplier to provide infmtion on ai t3z.e naessan/ interjices (e.g. ail instrumentation tapping points and instruments, including their signai outputs, etc., provided within the extent of supply). In addition provision muy need to be made in the contract to ensure
31、 the avaUabity of inforrnution necessary to auoW a satisfmtmy control system to be obtained. For ampk, this muy include a requirement for cooperation between the purchaser and supplier. Alternatively the specwcation muy define the technical information on equipment characWt.icS to be prowkd by the s
32、upplier an the pmgmmm for its o!divery If the purchaser wishes to have a cmtmct for electrica syslstems, electrical equipmat, cabes, etc. separate fm the equipment supply contract, the specmation my require the supplier to provide information on a the wessaq interjices electrical loads, sh heights,
33、motor speeds and direction of rotation, terminai boxes, etc.). Provision may wed to be made in the contmct for coopemtion between purchaser and supplier for system(s) to be Cleveloped OT the specification may define the techni. - restrictions e.g. process waste disposal. suppla m wohg systems; 7.2 M
34、anning levels The specification should - state the minimum load at which the desulfurization plant is put into operation or taken out of operation. Where appropriate the performance requirements under these conditions should be stated. If the purchaser has any special requirements, this should be st
35、ated, for example a large number of starts in a short period of time andor use of supplementary fuels. The specification should - air heater fire; - failure of electrostatic precipitator; - induced draught fan hip; - sudden loss of boiler firing; - loss of power supplies or cooling system; - emergen
36、cy shutdown of boilerhbine unit. The specification should interpret these incidents in terms of variations of the physical parameters at the terminal points. In some cases these abnormal conditions may be avoided by modifications outside the suppliers equipment. This may be covered by an option in t
37、he tender. disturbanCeS; O BSI 09-1999 STD.BS1 BS EN 45510-4-b-ENGL 1999 1624669 0793027 2b5 81 7.7 Further operational requirements 7.7.1 Load changes The specification should dene the required flexibiity and controlability of the equipment during transient operation. For flexibility this may compr
38、ise time related variations of flow rate, temperature, pressure and composition of untreated gas during load changes of the boiler. Performance requirements under these conditions should be stated. For controllability the limits on operating parameters should be stated 7.7.2 Minimum load The specifi
39、cation should state the minimum continuous load at which the desulfurization plant wil be in operation. The specification should provide the flow rate, temperature, pressure and composition of the untreated gas, other interface conditions and any performance requirements at this load. 8 Life expecta
40、ncy 8.1 Design life 8.1.1 General This should be a spec chemical analysis, mineralogical analysis (i.e. chalk, marble, quicklime or he), particle size distribution, bulk density, wear factor, whiteness and reactivity, porosity or specific surface. Samples of absorbent may be given to the supplier fo
41、r further examination, for example reactivity tests. If for example, deiiveries of fuel with the highest sulfur content are infrequent or if there is a requirement for periodic operation of the boiler at loads above the continuous maximum operating condition (overload operation), the purchaser may w
42、ish to utilise the specified margins or component redundancy rather than have the plant designed for these conditions (9.3 and 9.4). If the purchaser adopts this approach, the specification should define the conditions at which the desulfurization plant may be operated with the use of specified marg
43、ins or component redundancy. O BSI 09-1999 STD-BSI BS EN Y55LO-4-6-ENGL 3999 Lb24669 0793030 T87 Page 10 EN 455104-6:1999 9.2 Performance The specwcation may process water, process steamhd water, compressed aiq - treated gas temperature; - flue gas pressure drop; - composition of the treated gas; -
44、quality and quantity of by-product; - quality and quantity of waste water and process waste. In addition the specification may define performance tests of components, for example sluny pumps, mills, agitatom, demistem, valves, nozzles and sprayers, by-product drying, handling and transport equipment
45、, etc., and request statements Grom the supplier on the lifetime of linings, coatings, materiah of construction, etc. The methods of sampling and measurement to be employed should be defined by the specification. NOTE Peflrmance tests are sometimes conducted off site and muy be carried out at condit
46、ions differentfmm the Operating point. The results may require scaling according to aqree for example additional absorbent flow to the absorber towers to allow for highest suifur content fuels or load in excess of the continuous maximum operating condition of the boiiedturbine unit The supplier shou
47、ld only use .%,ese additional phnt components in meeting performance requirements in the conditions ctwnal shdd. m Lb24bb9 0793032 85T II 11.4 Lifting requirements The specmation should define in the extent of supply (see clause 5) whether any permanent lifiing devices are to be ins- and where mobil
48、e manes, fork li$ truck, etc. are permitted fw some operations. The specification should define whether the permanent equipment should be pmwided by ule supplier and, if not, the information exchange required for its design and instauation. AU items lihly to be required to be removed for maintaance
49、should be provided with appropriate 1iflin.g points. 11.6 Special tools The specification should request the supplier to .identify where sp - auOw evalwltion by Ute purchaser. - facuitate system studies; This information may include design parameters, dmwings, schedules, schematic functional and instrumentation diagmms, type test certification and wfme installations. 12.2 Contract documentation The specmation should - running costs; - cost-effectiveness; - quality; - aesthetic and functional characteristics; - technical merit; - c4Jte
