1、STD-BSI BS EN 45510-4-7-ENGL 1779 1b24bb9 0772562 104 BRITISH STANDARD Guide for procurement of power station equipment - Part 4: Boiler auxiliaries - Section 7: Ash handling plant The European Standard EN 4551047 1999 has the status of a British Standard ICs 27.060.30 27.100 BS EN 46510-4-7:1999 Na
2、tional foreword been prepared under the Sector Committee, was published under the authority of the Standards Committee and comes into effect, on 15 September 1999 direction of the Engineering Amd. No. O BSI 09-1999 ISBN O 580 32507 5 This British Standard is the English language version of EN 45510-
3、4-7:1999. The UK participation in its preparation was entrusted to Technical Committee E/-/20, Power engineering steering committee, which has the responsibility to: Date Comments - aid enquirers to understand the text; - present to the responsible European committee any enquiries on the - monitor r
4、elated 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 this committee can be obtained on request to its secretary. Cross-references The British Standards which im
5、plement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled ?International Standards Correspondence Index?, or by using the ?Find facility of the BSI Standards Electronic Catalogue. A British Standard does not pur
6、port to include all the necessary provisions of a contsact. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front
7、cover, the EN title page, pages 2 to 17 and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. STD.BSI BS EN 45510-4-7-ENGL 1999 1b24bb9 079t5b4 Ta m EUROPEAN flmARD EN 4551047 NORME EUR0PEE”E EuROP - ram-type slag extractor; - belt conveyo
8、r, - drag-link conveyor; - vibratory conveyor; - screw conveyor; - apron conveyor; - bucket elevator; - skip hoist; - vehicles. Hydrauiic conveying systems use water as conveying medium. These include, for example: - water-filled ash hopper; - dry ash hopper; - sluiceway; - slurry pump wih pipeline;
9、 - ejector with pipeline. Generally a combination of the above systems is employed “h,e equipment covered by this Guide is defined by its function rather than design type. Thmefore, the guidume to the specification is stated in per$omme terms rather than being sp - predicted performance is achieved;
10、 - anc.illan/ equipment is ppery sized; - reliability, availability and safety requirements are achieved; - mer consiakration is given to the mahation process and th quality measures to be applied. correctly with om ekments of the systems such as This Guide does not determin. the type of specifleati
11、on (e.g. detailed, pHormance, functiorud) or the extent of supply-for any given contract, which is normally decided on Uze basis of thpurchaserk project strategy. It does not cover: - any commercial, contractual or legal issues, which a,re rwrrnally in separate paris of a,n enquirg; - any allocation
12、 of responsibilities, which are determined by th contract. mis Guide does not prescribe the arrangement of the dommts in the enquirg. NOTE As a comprehensive European environmental policy is still under preparation, this Guide does not address the environm.enta1 implications of th,e equipment. 2 Nor
13、mative references This Guide for procurement incorporates by dated or undated reference, provisions from other publimtions. These normative references are cited in the appropiate places in thR text and the publications are listed hereafkx For dated refwences, subsequent amendments to or m.risions of
14、 any of these publications apply to this Guide only when incorporated in it by amendment or revision. For undated refwmes, the lutest edition of the publimtwn refmed to appligs. EN IS0 9001, Quality systems - Model .for quality assurance in design, deveopment, production, instulLution and seruicing
15、(IS0 9001:1994). EN IS0 9002 Quality systems - Model for quality assumnce in production, installatwn a.nd servicing (IS0 9002: 1994). IEC 60050 (1 91) Intemational electrotechnicai VOChlUT. 3 Definitions For the purposes of this Guide, the followiq definitions apply. 3.1 Organizational terms 3.1.1 p
16、urchaser recipient of a, product ador a, smke provided by a supplier 3.1.2 supplier person or organimtion that proWs a product and/or a service to the purchaser O BSI 09-1999 3.1.3 specification clmument stating technical requirements of the purchaser. It may form pari of an enquiry issued by a purc
17、haser 3.1.4 enquiru invitation to tender .issued by a purchaser. It wilt! normally incl together with so much of the area surrounding as ULe supplier may, with the consent of ULe purchaser, use for the purposes of the contract NOTE Further definitions of useful organizational temns my be fou.CS defi
18、ned in IEC 60050 (191) does not restrict operational requirments of the 4 Brief overall project description 4.1 Role and organization of purchaser The enquiry should - geologicai, e.g. seismic conditions and chmteristics of subsoil (e.g. caverns, gliding stmtgications, load bearing capability of sub
19、soils); - geographic, e.g. elevatwn, influence of local - hydrological, e.g. noding and tides. 4.3 Equipment task The specification should describe in general temns the function, task or role of the equipment to be purchased, e.g. whether it is part of a new power generating plant, a modificatwn to
20、an existing pou?er genemting phnt, or replacernent equipment. The specification should stak the type of furnace from which the ash is being - the type of ash extraction device (either submerged scraper conveyor, ram-type slag extractor, water-filled ash hopper or dry ash hopper); - a double arrangem
21、ent of submerged scraper conveyor or any other conveying device for standby purposes; - the type, capacity and necessary ancillasy equipment of intermediate storage facilities; - the method of long distance transport of the ash (e.g. rail, road, ship, barge, conveyor belt); - the type of loading equ
22、ipment for long distance transport; - an intermittent removal of coal mili rejects, for example pyrites, by means of hydraulic conveyor into the submerged scraper conveyor or the water-filled ash hopper. The specification may adso define prefes for equipment types (or give information) regarding com
23、patibility with misting equipment, if required. The specification may define any preferences with regad to the grouping of systems, for example with a hydraulic system the equipment may include a recycling system for the conveying water. The specification should define the intended methods or local
24、practice for maintenance, inspection and operation. The specification should define requirements with regard to the general appearance of th? equipment (e.0. dimmsions, shape or colour) to meet local planning requirements or specific criteria, where such requirements exist. NOTE Attention is drawn t
25、o European, national a.dw local legislation which may place restrictions in this area. 4.6 Control and instrumentation The specification should tbe should be to a recognized Europea?n or inlemational standard. The specification should define the type and capacity of other services for the operation
26、of the equipment, such as compressed air, process water etc. 4.7 Other interfaces Th,e specification should define the inwaces with existing a,miUury or new ancillary equipment to be supp1.ied under separate contracts which interact directly with the equipment, for example civil works, manage or tem
27、porary systems. 4.8 Project programme The specification should desm:be the overa programme a,nd timescale in which - auxiliary equipment such as controls, power supplies, cooling and cleaning systems, water recycling system; - accessories for handling and maintenance systems; - spare parts such as c
28、omponents subject to wear or replacement unis; - site activities such as storage, transport and instailation; - commissioning and performance tests; - documentation of equipment or system details, operation and maintenance manuals. The containment area (lagoon) for dumping the ash is generally exclu
29、ded from the extent of supply of a hydraulic conveying system. Other major structural items such as bridges etc. may also be excluded from the extent of supply. O BSI 09-1999 If the purchaser wishes to hue a contract for control and instrumentation separate frmn the equipment supply conmt, the speci
30、fication may require the supplier to provide information on ai the necessary inwaces (e.g. ail instrumentiation tapping points and instruments, including their signai outputs, etc., provided within the extent of supply). In aition puision may need to be made in the contract to ensure the avaubity of
31、 infmtion necessary to auoW a satisfactory control systmn to be obtained. For example, this my include a requirement for coopemtion between the purchaser and supplier. Alternatively, the specification may define the technical information on equipment chamctemstics to be pwided by the supplier and th
32、e Irrogramme for If the purchaser wishes to have a contract for electrical systems, electrical equipment, cables, etc. sepamtefmm the equipment supply contmct, the specification may require the supplier to prowide infition on ai the necessary intmj.ces ( should be stated. The specification should al
33、so state the policy in the fohwing operatwnai areas: - risks, e.g. loss of electrical supplies, loss of water supplies or cooling systems; - obligations, e.g. operational stag shift patterns; - restmktions, e.g. process waste disposal. 7.2 Manning levels The specification should define the power sta
34、tion manning leuek where they may influence the equipment supply. 7.3 Normal operation The specification should define in had terms the expected mTIILcc1 opemtwn of the power station and of the equipment. This may be a period of continuous full load operation between planned shutdowns of its associa
35、ted boileriturbine unit, followed by a period at full or part load for a reduced number of hours between planned shutdowns and then a period of intermittent operation with frequent short shut-downs. The specification should define the continuous maximum operating condition and continuous minimum ope
36、rating conition for the ash handling O BSI 09-1999 Page 10 EN 45510-4-71999 plant or any component. if the equipment or system to be purchased is to serve a number of boilerkbine units commonly the specification should state whether standby systems may be offered to achieve the required availability
37、. 7.4 Operating hours The specscation should define the total life time required of the power station and thR equipment (e.g. hours) and the required operating period of the equipment. 7.6 Start-up and shut-down The specification should define the number and type of planned start-up and shutdown cyc
38、les in the lifetime of the associated boiler). The specification should define Uze expected changeover stmtegy where stundby equipment or bypasses are prowided. 7.6 Abnormal conditions The specification should provide information on th.e known abnormal conditions to which the equipment might be subj
39、ected. Tke supplier should ta - high carbon content in the ash due to combustion disturbances; - failure of power supplies or loss of process water supplies; - large pressure changes induced by other equipment; - blockage of transport devices or surge hoppers. The Specification should interpret thes
40、e 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 alternative offer by the supplier. 7.7 Further operational requirements The specifi
41、cation should provide information on the required flexibility and controllability of the equipment during transient operation. For flexibility this may comprise time related dations of load or ash flow and specific control criteria such as controlled start-up and shutdown of long hydraulic conveying
42、 system to avoid water hammer. The specification should - ash analysis, associated with the specified range of fuel; - unbunit carbon; - physical state (e.g. molten, sintered lumps, size distribution); - effects of fuel additives such as lime, limestone etc. The specification may define performance
43、requirements for individual components within the system supplied 9.2 Performance The specifecation may define the opemting points and ouler defined conditions at which the equipment pei$ormance requirements are to be honstrated immediately ar commissioning ador at other points in the Ive of the equ
44、ipment. In addition to capacity and absorbed power performance tests, further test items may be consumption of compressed air and process water, waste water quaiity etc. NOTE Performance tests are sometimes conducted off site and may be carried out at conditions diflerent from the operating point. T
45、he results may require scalzng according to agreed rules 9.3 Equipment margins The speciffcation should identify required equipment 9.4 Availability The specification may specify availabilitg requiremats. In order to demonstrate conformity with mOnstrate that the level of redunddncy inciW is - auOw
46、evaluation by the purchaser. - fanlitate system studies,. This infmtion may include design parameters, drawings, scheduh, schernutic funct.icmal and instrumtation duCgmms, type test certification and refme installatwm. 12.2 Contract documentation The specification should define a list of documents t
47、o be powided by the supplier This should include a - running costs; - cost-effectiveness; - quality; - aeshtix and functional chamteristics; - technical merit; - after-sah smke and technical assistsl.nce; - commitments with regard to spare pa.-; - secum.ty of supplies; - price. O BSI 09-1999 14.2 Te
48、chnical criteria The enquiry should - detailed plans.for tests of integration of equipment; - components and systems which have to be opembie .for commissioning of other plant; - definition of the commisshing prvcess and the necessa.y documentation required. 17 Verification of specified performance
49、17.1 General Test will, in general, be required on the equipment at various stages of the contract to &fy its performance. The specification should define Uze tests required and their conditions and organization. This mazy include definition of the provision of site seruices, personnel, etc. 17.2 Works tests Tests during munufacture may include type tests, speciaL tests a:& routine tests. Test requirements are .identtfi,ed in the refmeme standards, where these &t, with special tests beng carried out only when required by the specification. The specification should define
