DEP 32.24.20.30-Gen.pdf
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1、TECHNICAL SPECIFICATION CONTROL SYSTEM AND INSTRUMENTED PROTECTIVE FUNCTIONS FOR FIRED EQUIPMENT - System for a single-burner furnace (S 24.024 and S 24.026) DEP 32.24.20.30-Gen. July 1997 (DEP Circular 56/97 has been incorporated) DESIGN AND ENGINEERING PRACTICE USED BY COMPANIES OF THE ROYAL DUTCH
2、/SHELL GROUP This document is confidential. Neither the whole nor any part of this document may be disclosed to any third party without the prior written consent of Shell International Oil Products B.V. and Shell International Exploration and Production B.V., The Hague, The Netherlands. The copyrigh
3、t of this document is vested in these companies. All rights reserved. Neither the whole nor any part of this document may be reproduced, stored in any retrieval system or transmitted in any form or by any means (electronic, mechanical, reprographic, recording or otherwise) without the prior written
4、consent of the copyright owners. PREFACE DEP (Design and Engineering Practice) publications reflect the views, at the time of publication, of: Shell International Oil Products B.V. (SIOP) and Shell International Exploration and Production B.V. (SIEP) and Shell International Chemicals B.V. (SIC) The
5、Hague, The Netherlands, and other Service Companies. They are based on the experience acquired during their involvement with the design, construction, operation and maintenance of processing units and facilities, and they are supplemented with the experience of Group Operating companies. Where appro
6、priate they are based on, or reference is made to, national and international standards and codes of practice. The objective is to set the recommended standard for good design and engineering practice applied by Group companies operating an oil refinery, gas handling installation, chemical plant, oi
7、l and gas production facility, or any other such facility, and thereby to achieve maximum technical and economic benefit from standardization. The information set forth in these publications is provided to users for their consideration and decision to implement. This is of particular importance wher
8、e DEPs may not cover every requirement or diversity of condition at each locality. The system of DEPs is expected to be sufficiently flexible to allow individual operating companies to adapt the information set forth in DEPs to their own environment and requirements. When Contractors or Manufacturer
9、s/Suppliers use DEPs they shall be solely responsible for the quality of work and the attainment of the required design and engineering standards. In particular, for those requirements not specifically covered, the Principal will expect them to follow those design and engineering practices which wil
10、l achieve the same level of integrity as reflected in the DEPs. If in doubt, the Contractor or Manufacturer/Supplier shall, without detracting from his own responsibility, consult the Principal or its technical advisor. The right to use DEPs is granted by SIOP, SIEP or SIC, in most cases under Servi
11、ce Agreements primarily with companies of the Royal Dutch/Shell Group and other companies receiving technical advice and services from SIOP, SIEP or SIC. Consequently, three categories of users of DEPs can be distinguished: 1)Operating companies having a Service Agreement with SIOP, SIEP, SIC or oth
12、er Service Company. The use of DEPs by these Operating companies is subject in all respects to the terms and conditions of the relevant Service Agreement. 2)Other parties who are authorized to use DEPs subject to appropriate contractual arrangements. 3)Contractors/subcontractors and Manufacturers/Su
13、ppliers under a contract with users referred to under 1) or 2) which requires that tenders for projects, materials supplied or - generally - work performed on behalf of the said users comply with the relevant standards. Subject to any particular terms and conditions as may be set forth in specific a
14、greements with users, SIOP, SIEP and SIC disclaim any liability of whatsoever nature for any damage (including injury or death) suffered by any company or person whomsoever as a result of or in connection with the use, application or implementation of any DEP, combination of DEPs or any part thereof
15、. The benefit of this disclaimer shall inure in all respects to SIOP, SIEP, SIC and/or any company affiliated to these companies that may issue DEPs or require the use of DEPs. Without prejudice to any specific terms in respect of confidentiality under relevant contractual arrangements, DEPs shall n
16、ot, without the prior written consent of SIOP and SIEP, be disclosed by users to any company or person whomsoever and the DEPs shall be used exclusively for the purpose for which they have been provided to the user. They shall be returned after use, including any copies which shall only be made by u
17、sers with the express prior written consent of SIOP and SIEP. The copyright of DEPs vests in SIOP and SIEP. Users shall arrange for DEPs to be held in safe custody and SIOP or SIEP may at any time require information satisfactory to them in order to ascertain how users implement this requirement. Al
18、l administrative queries should be directed to the DEP Administrator in SIOP. NOTE: In addition to DEP publications there are Standard Specifications and Draft DEPs for Development (DDDs). DDDs generally introduce new procedures or techniques that will probably need updating as further experience de
19、velops during their use. The above requirements for distribution and use of DEPs are also applicable to Standard Specifications and DDDs. Standard Specifications and DDDs will gradually be replaced by DEPs. DEP 32.24.20.30-Gen. July 1997 Page 2 TABLE OF CONTENTS 1.INTRODUCTION.4 1.1SCOPE 4 1.2DISTRI
20、BUTION, INTENDED USE AND REGULATORY CONSIDERATIONS4 1.3DEFINITIONS AND ABBREVIATIONS.4 1.4CROSS-REFERENCES5 2.GENERAL. 6 3.FUNCTIONAL (OPERATIONAL)DESCRIPTION7 3.1LOAD CONTROL7 3.2AIR/FUEL RATIO CONTROL8 3.3WASTE GAS FIRING8 3.4START-UP AND OPERATIONAL ASPECTS.8 4.TECHNICAL DESCRIPTION10 4.1IMPLEMEN
21、TATION CONSIDERATIONS.10 4.2LOCATIONS OF ALARMS, SWITCHES, ETC.11 4.3CALCULATION FORMULAS12 4.4DESCRIPTION OF INSTRUMENTED PROTECTIVE FUNCTIONS14 4.5IPF CLASSIFICATION AND CAUSE AND EFFECT DIAGRAM.18 5.REFERENCES19 APPENDICES APPENDIX 1Functional logic diagrams for a single burner furnace.20 DEP 32.
22、24.20.30-Gen. July 1997 Page 3 1.INTRODUCTION 1.1SCOPE This DEP specifies requirements and gives recommendations for control systems and instrumented protective functions for a dual fuel fired, forced draught, single burner furnace/boiler. This DEP may also be used for single fuel fired equipment; i
23、f the heater is fired on gas only, all fuel oil related instrumentation may be disregarded, and vice versa. Similarly, this DEP may also be used for a natural draught furnace, in which case all relevant combustion air controls and trips may be disregarded. This DEP shall not be used for multi-burner
24、 furnaces/boilers, unless specified by the Principal. This DEP contains a control and IPF narrative and logic diagrams and refers to a standard specific process engineering flow scheme. This DEP shall be used together with Standard Drawings S 24.024 (dual fuel) or S 24.026 (fuel gas). This DEP is wr
25、itten for systems which use DCS for control and monitoring and PLC or Solid State / magnetic core type Instrumented Protective Functions. Accordingly, more use has been made of inverted signals than would have been the case for relay type IPFs. 1.2DISTRIBUTION, INTENDED USE AND REGULATORY CONSIDERAT
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