1、BS 3567 : 1985 UDC 662.66.01 1 :622.7:65.015.6 0 British Standards Institution. No part of this publication may be photocopied or othenivise reproduced without the prior permission in writing of BSI British Standard Code of practice for Preparation of flowsheets for the design of coal preparation pl
2、ant Organigramme de conception dune usine de prparation du charbon - Code de bonne pratique Leitfaden fr das Anfertigen von Ablaufplnen zur Entwicklung von Ko h leau f be rei tu ng sa n lagen British Standards Institution BS 3567 : 1985 BSI BS*356? 01 CI 1b24b69 0290?23 O Foreword This British Stand
3、ard code of practice has been prepared under the direction of the Solid Mineral Fuels Standards Committee. It is a revision of BS 3567 : 1962 which is withdrawn. At various stages in the design of a complete plant it is necessary to illustrate by flowsheets the process steps cover- ing the operation
4、s to which the raw coal will be subjected in the coal preparation plant. In order that these may be more readily and universally understood, it is desirable that flowsheets should conform to a standard pattern and that various conventions should be well understood and adopted. During the preparation
5、 of this revision account has been taken of the 1985 revision of BS 3553 and the proposals of Technical Committee TC 27 of the International Organization foi Standardization (ISO) for the revision of ISO924. Compliance with a British Standard does not of itself confer immunity from legal obligations
6、. Contents Foreword Committees responsible BS 3567 : 1985 i Page Inside front cover Back cover Code of practice 1 Scope 2 Definitions and symbols 3 Types of basic flowsheet 4 Principles for grouping of operations 5 Conventions for the preparation of flowsheets and products Appendix A Guide to the ap
7、plication of definitions of capacity Figures 1 Example of process flowsheet 2 Example of equipment flowsheet 2 2 2 2 7 8 3 5 . 1 BS 3567 : 1985 Code of practice BSI BS835b7 O1 Lb24bb9 0290725 4 W 1 Scope This code of practice gives recommendations on, and the conventions for, the preparation of basi
8、c process and equip- ment flowsheets for the design of coal preparation plant. NOTE. The titles of the publications referred to in this standard are listed on the inside back cover. 2 Definitions and symbols For the purposes of this British Standard, the definitions given in BS 3552 and the symbols
9、given in BS 3553 apply. NOTE. A guide on the application of definitions of capacity is given in appendix A. 3 Types of basic flowsheet In order to cover the various stages leading to the final design of a plant two basic flowsheets are needed, one for the process and one for the equipment. Examples
10、of process and equipment flowsheets are shown in figure 1 and figure 2 respectively. These flowsheets are included for information only and may be altered to suit the convenience of the parties concerned. However, in the interests of standardization, it is recommended that the examples shown in figu
11、res 1 and 2 are followed unless it is essential to do otherwise. NOTE. More detailed flowsheets are likely to be required as plan- ning proceeds, for example where cleaning of the coal is involved. It may also be necessary to illustrate the water (or other medium) circuits and to indicate the quanti
12、ties at various parts of the plant. These and other specialized flowsheets are not dealt with in this standard but it is assumed that, as far as appropriate, the same conventions would be applied in them as in the basic process and equipment flowsheets. 4 Principles for grouping of operations and pr
13、oducts In order to prepare a flowsheet the preparation process should be broken into a number of headings so that stages coming within the scope of a particular heading are grouped together. It is recommended that the stages from the point where the raw coal enters the plant to the disposition of th
14、e products are summarized under the following headings: (a) pretreatment of feed; (b) coal cleaning; (c) subsequent treatment of products (including separation of solids from water); (d) storage and loading of products; (e) characteristics of products; (f) destination of products. NOTE. In certain c
15、ases it may be desirable, in the equipment flow- sheet, to indicate loading arrangements under (d) and to omit (e) as shown in the example in figure 2. 2 UJW nr o L m u. -I I- I - c m c, o - 2 Fi isi u) O P 4 O s O I m c I 3 f 1 U o E ,g X E o r o c c c v - o o o O r E- !i 8 .“ ! =(I .E (I -0 C “U .
16、- LB u$ 4% - BSI BSU3567 O1 1624669 O290728 T pp-pppp- BS 3567 : 1985 5 Conventions for the preparation of flowsheets To avoid risks of confusion and to ensure that the standard flowsheets are simplified as far as possible, it is essential that the following conventions be adopted. (a) Write the ent
17、ry for the raw coal for the plant at the top left-hand corner of the flowsheet. (b) Arrange, as far as possible, the flowsheet so that the size of products decreases from the top downwards. Where size ranges are shown, give the larger size first (for example, 0.5 mm and O). Similarly, arrange a vert
18、ically descending order for cleaned coal, middlings and discard. (c) Indicate flow of material by horizontal or vertical lines, Enter the squares, rectangles or symbols from the top or left side and leave from the bottom or right side, giving in general a left to right flow, except that lines indica
19、ting products for re-treatment within the installa- tion may leave from the right side, pass upwards and then proceed from right to left and join the line of entry to the re-treatment operation. Where more than one material enters or leaves an item of plant, vary the num- ber of entry and exit arrow
20、s accordingly. (d) Indicate junctions of flowlines by crossing or joining lines; the junctions may be indicated by spots. Where lines cross and there is no junction use loop cross-overs. For uniformity, draw all loops either in the horizontal or vertical planes and all on the same side of the flow-
21、lines. (e) Indicate sizes of material by the addition of mm after the appropriate figures. Use figures without quali- fication to indicate rate but indicate quantities (for example, bin capacities) by mass using t for tonnes. (f) Adopt a uniform method of expressing and defining capacities. NOTE. A
22、guide to the application of definitions of capacities is given in appendix A. It is recognized that considerable variations are likely to occur in the rate of supply of a coal to a preparation plant and that variations also occur in the quality because of changes in the size distribution and proport
23、ion of impurity. Define capacities at ail stages, from the inception of a project to the final design, to ensure a clear understand- ing of the load conditions throughout the plant which, in the later stages, may be associated with performance guarantees. On the equipment flowsheet write the figures
24、 for the operational and design capacities above and those for peak design or mechanical maximum capacities below the horizontal flowlines without any interruption of the lines. Should it be necessary to show capacities on vertical flowlines, write the figures for operational and design capacities o
25、n the left-hand side of the lines and those for peak design or mechanical maximum capacities in parentheses. In addition, give mechanical maximum capacities of equipment handling materials either in tabular form, on the equipment flowsheet, or in a separate document, NOTE. Where maximum and minimum
26、rates are given for design capacity, these may be separated by an oblique stroke or dash. On process flowlines, enter only figures for the upper limits of design capacities, all written above the horizon- tal flowlines or to the left of vertical flowlines. Examples of capacity figures are shown in f
27、igures 1 and 2. (9) Indicate divisions between categories of process steps by vertical lines, as in figures 1 and 2, and distinguish them from the flowlines, e.g. by a thicker line broken at flowlines. (h) Indicate, on the process flowsheet, the processes and stages by rectangles. Use rectangles rou
28、ghly equivalent in size and elongated vertically or horizontally as most convenient to the originator. It is essential that identifi- cation of the processes and stages are written within the rectangles as shown in the example process flowsheet given in figure 1. Do not use symbols on process flow-
29、sheets. (i) Indicate, on the equipment flowsheets, the machines or items of plant by standard symbols (see BS 3553) which minimize the use of written descriptions. If a written reference is necessary, then it is recommended that this briefly indicates the size and number of units corresponding to th
30、e appropriate symbol. (j) Draw the rectangles on process flowsheets and the symbols on equipment flowsheets in thick full lines and the product flow by slightly thinner full lines. Distin- guish the flowlines for other minor circuits, such as fluid only, by relatively thinner full lines. Ensure that
31、 all lines are of the same density. (k) If it is appropriate to show code numbers referring to particular items of plant on an equipment flowsheet, make the numbers distinct from other figures and enclose them in circles. (i) When it is desired to illustrate an extension or addition to the flowsheet
32、, e.g. froth flotation plant, indicate the appropriate plant and circuits by charac- teristic lines, for example, chain dotting. Previous page is blank 7 BS 3567 : 1985 - - - BSI BSa3.567 01 = I624669 0290729 I Appendix Appendix A. Guide to the application of definitions of capacity A.1 Nominal capa
33、city The nominal capacity of individual machines is defined in relation to a particular set of clearly specified conditions. For example, the capacity of a jig of given dimensions depends upon the size distribution of the coal (not only upon its upper size limits) and upon the proportion of middling
34、s material. The capacity of a screen depends upon the proportion of near-mesh materials and, for a raw coal, upon the dampness of the coal. Consequently nominal capacities should only be applied to complete plants and to general descriptions relating to specific projects. The nomi- nal capacity of a
35、 plant is less than the sum of the design capacities of individual units contained in the plant and also less than the sum of the mechanical maximum capacities. A.2 Operational capacity Operational capacities which are usually written on flow- lines are derived from design capacity figures and inclu
36、de combinations of design capacity figures at product junction points. A.3 Design capacity The ability of any item of plant to achieve its guaranteed results depends upon the rate of the feed and the propor- tions of its components, both of these factors being liable to fluctuation during commercial
37、 operation. It is not possible to lay down standard conditions for any acceptance tests as they also depend upon circumstances. The guarantee finally agreed upon between the parties would generally deal with any limit as to the duration or extent of fluctua- a tions in the rate and quality of the fe
38、ed and the rate of discharge of the products during any acceptance test. It would not usually be possible to enter all such details on the flowsheet. However, it is essential that the flowsheet gives capacities and rates of flow. The maximum rate of supply of the feed material to the particular item
39、 of equip- ment, and the maximum and minimum rates of production of the products from it, should be stated so that variations in the composition of the feed and to some extent variations in the rate of feed would be defined, The results may be guaranteed only between these limits. NOTE. Any addition
40、al limits on the extent and duration of fluctua- tions in the feed, or any further qualifications of the guarantee or conditions of test, may be incorporated in a guarantee document. In inany cases it may be desirable to indicate a design capacity even though no question of guarantee arises, in orde
41、r to facilitate the selection of suitable equipment. A.4 Peak design capacity The plant, or specific items of equipment within it, may be required, from time to time, to accept coal at rates of supply above those covered by the design capacity. This excess coal may continue to be handled without blo
42、ckage or mechanical breakdown of the plant, in order not to interrupt the working of some other part of the entire enterprise (eng. so as not to stop the winding of coal from underground). Thus it is desirable to state the rates of supply and peak design capacity at which particular items of equipme
43、nt will continue to function, without necessarily achieving the guaranteed performance. A.5 Mechanical maximum capacity Mechanical maximum capacity is the maximum rate of feed at which equipment handling materials (e.g. conveyors, pumps, crushers) which are not subject to individual guarantees of pe
44、rformance will function. Publications referred to ES 3552 ES 3553 IS0 924* Glossary of coal preparation terms Graphical symbols for coal preparation plant Coal preparation plant - Principles and conventions for flowsheets *Referred to in the foreword only. For information about BSI services relating
45、 to third party certification to suitable British Standard product specifications, schemes for the registration of firms of assessed capability, testing and inspection facilities, please contact the Director, Quality Assurance Division, BSI, PO Box 375, Milton Keynes MK14 6LO. -_ BSI BS*3567 O1 W 1b
46、Zi.lbb9 0290731 T W BS 3567 : 1985 This British Standard, having been prepared under the direction of the Solid Mineral Fuels Standards Committee, was published under the authority of the Executive Board and comes into effect on 30 August 1985. %, British Standards Institution, 1985 First published
47、December 1962 First revision August 1985 ISBN O 580 14658 8 British Standards Institution Incorporated by Royal Charter, BSI is the independent national body for the preparation of British Standards. It is the UK member of the International Organization for Standardization and UK sponsor of the Brit
48、ish National Committee of the International Electrotechnical Commission. Copyright Users of British Standards are reminded that copyright subsists in all BSI publications. No part of this publication may be reproduced in any form without the prior permission in writing of BSI. This does not preclude
49、 the free use, in thecourse of implementing the standard, of necessary details such as symbols and size, type or grade designations, Enquiries should be addressed to the Publications Manager, British Standards Institution, Linford Wood, Milton Keynes MK14 6LE. The number for telephone enquiries is 0908 320033 and for telex 825777. Contract requirements A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Revision of British Standards British Standard
