The world s finest system for scheduling feedstocks, operations and products in refineries, chemicals and petrochemical plants

Transcription

1 An OMNISuite TM Software Module The world s finest system for scheduling feedstocks, operations and products in refineries, chemicals and petrochemical plants Authorized Distributer TECHNOTRADE 7-A Bank Square Market, Model Town, Lahore Pakistan Tel: Fax: sales@technotrade.com.pk Website:

2 Table of Contents 1. Introduction Description of Scheduling Applications Applications Crude Supply Scheduling (H/CSS TM ) Crude Oil Scheduling (H/COSS TM ) Refinery Operations Scheduling (H/ROSS TM ) Blend Scheduling (H/BOSS TM ) Distribution and Regional Transportation Scheduling (H/DARTS TM ) Software Modules Direct Services Technical Support Training Hardware and Software Documentation... 12

3 1. Introduction Haverly Systems Inc. is a software development company founded in HSI is the worlds leader with well over 200 Planning and Scheduling installations of our software in locations all over the globe. Our systems are used in refineries and petrochemical plants alike both for short term and long term planning. Since 1991, when HSI introduced our first complete H/SCHED based scheduling system at Novacor Petrochemicals in Sarnia, HSI has been the worlds leading scheduling software. In fact all H/SCHED-based systems ever attempted have been successfully completed and are in operation today. Many companies, both large and small, have attempted to develop similar systems, but each has failed to develop event-based scheduling software up to world class standards of H/SCHED software. 2. Description of Scheduling Applications H/SCHED stands for Haverly Scheduling Software It is a suite of software modules designed to configure complete event based scheduling applications. Such applications are installed on standard PCs requiring no special hardware to run. H/SCHED systems are used by plant schedulers to create initial schedules of operations over a time period chosen by the user (30 days for example), then used to handle day to day issues. These include scheduling operations when unscheduled events occur, or when there are options to consider. What-if options are easily tested for economic benefits. Unlike other systems, H/SCHED can generate a complete schedule of events, including proper sequencing of events using our proprietary Schedule Generation Module (SGM). This is a very important feature. For competing systems it can take literally days of effort to manually create a schedule. And that schedule can only be feasible, not optimal. Scheduling Interface

4 Of equal importance is that all schedules created with SGM are optimized. We do this with proprietary technology developed exclusively by HSI. Optimized means there is no better schedule possible considering inventory, plant hardware and supply commitments. Schedule generation and optimization runs take only a few minutes and provides the best possible sequence and duration of event decisions. One of our installations has three crude units, each taking a different feed (low sulfur, high sulfur and lubes). Oil tankers arrive and off-load into tanks at the terminal (about 20 tanks). The crudes from the tank farm are blended into a pipeline which carries oil into the refinery, about 20 miles away. In the refinery the oil is moved into waiting crude still charge tanks while different charge feed the crude stills (about 8 tanks). The complete schedule is automatically created starting with the deliveries of oil the terminal and going through the processing of oil in the crude stills. Ullage for delivered crude is ensured, thus saving expensive demurrage charges. Crude Oil blends are scheduled to keep the crude stills full of the correct mixture of oil. Finally all this is optimally scheduled to ensure that the required specifications are met on the cuts from the crude stills. The raw data for the crude assays is stored in tables and used in the optimization of properties of each cut. Once the scheduling decisions are confirmed, the scheduler can run the whole Schedule Simulation Module (SIM) to fine tune the schedule into specific events for the scheduling timeframe. SIM prepares the data for browsing in the Graphical user Interface (GUI). Scheduling details can be browsed and manually edited (if desired) in the GUI. The GUI includes Gantt charts of the events, over time, for all scheduling activities. The GUI provides flow diagrams for all the scheduled refinery flows. The flow diagrams are live. Clicking on a line, tank or unit brings up dialog boxes with details of the relevant events. The GUI also provides useful tank graphics for all tanks in the plant, including the flows in and out of the tank, the tracked composition displayed graphically over time and the tracked tank properties.

5 Tank Graphs Before running a schedule the scheduler can update tank inventories for the starting time of the schedule, rolling forward all the events since the last time he ran the schedule. This step, done with the Inventory Reconciliation Module, is automatic and linked to the Plant Information System databases. We provide a convenient Permanent data (Permdata) spreadsheet file that contains physical information about the plant and parameters for the optimization and simulation. There the scheduler can update any tank information such as tank assignments, changes in pump conditions, component mixing capabilities, line fill dispositions and many other physical parameters.

6 Plant Flow sheet HSCHED-based applications contain a complete plant information database, including all feeds into the plant, such as crude oils or condensates, all dispositions of the materials as they are processed, all yield correlations required to estimate yields and properties of the products, all blending data for producing blended products, and all shipping information to ensure shipping schedules are met. This self-contained model links to other refinery database systems such as PI or any Oracle-based system databases. Since H/SCHED contains its own database, it is not dependent on other systems or monthly LP models to obtain yields or other information. Yield correlations can be linked to you long range monthly LP modeling system database so yield data need only be entered once for both the planning system and the scheduling system.

7 Inventory Reconciliation In summary, H/SCHED provides Schedule Generation with Optimization (SGM), Schedule Simulation (SIM), Graphical User Interface (GUI) and Inventory Reconciliation (IRM). While there are additional modules used, these four main components are the backbone of HSI s scheduling system. H/SCHED offers proven technology through many and varied successful installations. H/SCHED systems offer tremendous benefits described in the benefits table below. In addition, through SGM the schedules are automatically created with optimization making H/SCHED systems true optimizing Decision Support application and a major saver.

8 3. Applications H/SCHED is used to create applications systems for refinery and petrochemical plants. Examples of applications we have created using the H/SCHED suite of modules include the following: 3.1. Crude Supply Scheduling (H/CSS TM ) Schedules longer term incoming receipts by tanker, barge, pipeline, truck and railcar over time. Identifies favorable time slots for receipt of specific shipments by crude type Identifies periods of potential shortage or excess of crude oil and imbalances of crude types needed to meet refinery blends Crude Oil Scheduling (H/COSS TM ) Schedules dock assignments, liftings and pipeline movements Identifies assignments to specific tanks in tank farms, transfer stations, or on-site tanks. Schedules blending of desired crude oil mixtures to achieve property specifications on crude oil cuts Tracks and simulates the volume and quality of transfers and blends. Schedules feedstocks to the crude distillation units to maintain steady state operation Refinery Operations Scheduling (H/ROSS TM ) Schedules feedstocks to the crude units to maintain steady state operations Schedules all rundown streams into downstream processes Schedules feeds and operating parameters on each process unit Tracks all flows and intermediate tankage including quantities and qualities Blend Scheduling (H/BOSS TM ) Schedules all process unit rundown streams into tanks Schedules blend headers for gasoline and distillate fuels Optimizes schedule based on header availability, tankage and product lifting schedule. Optimizes recipes based on properties and availability, including tank heels

9 Schedules production into product tanks, ships, barges, trucks and rail Distribution and Regional Transportation Scheduling (H/DARTS TM ) Schedules the distribution of product into terminals Schedules all pipeline transfers including line fills Schedules receipts at product terminals and tank farms Schedules deliveries to final destinations including pipelines, ships, barges and rail All H/SCHED applications are supplied with a Microsoft Windows User Interface. This allows access to all other H/SCHED modules as well as to Excel or Lotus 123 spreadsheets for data entry and editing. H/SCHED will run on Windows 95/98, NT or H/SCHED applications can integrate with one another thus covering the whole refinery operation from crude scheduling, to process unit operations, to product blending to product distribution. The standard modules apply to general situations. However, at each operating level, each refinery has its own set of circumstances and scheduling requirements. H/SCHED is assembled from proven software modules into the working tailored system with a common easy-to-use interface. H/SCHED easily integrates with plant information systems, refinery databases and crude assay systems. 4. Software Modules The full range of H/SCHED modules available for tailored assembly of scheduling applications includes: Inventory Reconciliation Module Compares Scheduled vs. Actual Inventories Highlight significant deviations from the Plan Allows Reconciliation of Differences Roll Forward (New Base) Module (RFM) Automates the creation of a new starting basis Used to break up a long schedule into smaller schedules for independent study Simulation Module (SIM) Event based simulator

10 Calculates at each event: o Flow dispositions throughout the system o Flowrates, composition and qualities of flows o Tank Inventories o Composition and Qualities of Tanks o Allows alternative mixing schedule routines controlled by scheduler Tank Tracking Module (TTM) Updates Inventory Volume, Grade, Composition or Quality as scheduled flows take place in and out. Schedule Generation Module (SIM) Creates and optimized schedule of decisions Prepares input for the simulator Uses proprietary progressional LP technology developed by HIS for scheduling A combination of LP, MIP and specialized algorithms Controlled via parameters from data tables. Generated Schedule can be edited by the Scheduler Graphical Display Interface Graphical Access to Data generated by the system through a flow-sheet layout of the operation including inventory time-line charts On-line alarms for warning of infeasible or problem situations. User configurable appearance colors, size etc Pop up graphs to show trends on all activities Output Reports Module (ORM) Text reports for use by the scheduler and others Direct links to relational databases and spreadsheets for custom reporting Outputs interface files to 3 rd party systems such as databases Graphical User Interface Module (GUI) Focal point of the Scheduling System Full graphical access to all scheduling decisions Gantt charts to show tanks and activities Events can be grouped for selective display Graphs to show trends in singly or in groups as thumbnails Highly User Configurable Case Management Module (CMM) The state of the schedule sat any time can be saved Cases may be retrieved, restored and rerun at any time Powerful for dealing with scenarios

11 5. Direct Services HSI s role in providing quality service starts even before a project starts off. We provide advice in information gathering and structuring. We guide clients in consideration of current as well as future requirements. HSI includes people with considerable refinery experience. We are able to detect inconsistencies in information that clients may have overlooked. Following the project, our services include code correction, responding to questions and improvements in the software. We are ready to resolve scheduling issues, interpretation issues and usage issues that come up from time to time. HIS provides an annual service policy for daily service and for enhancements. Enhancements are included in the price of the annual fee and are distributed when new versions are released. 6. Technical Support HSI offers comprehensive support services for all users including software enhancements, day to day hot line support, on-site support and annual site visitations. Support is available from HSI on a Daily basis through our Denville Scheduling Development Center in Denville, NJ. The team of engineers, programmers and operations research members are available 24 hours a day via . All delivered systems contain source code for the critical scheduling areas so if any changes are needed, they can be quickly updated. HIS staff works directly with your staff to resolve any issues quickly and efficiently. File transfers are supported through or through our website technical support area. H/SCHED is open software allowing the User to update the structure at will. HSI provides training in configuring changes in H/SCHED applications. Companies can change any aspect of H/SCHED. 7. Training Scheduling Training is in two parts. First we provide on-the-job training to schedulers when we deliver parts of the package during the project. This training is very beneficial to companies because the Schedulers can participate in the early look and feel of our graphical dialog box design. We involve the customer fully in all aspects of the design and implementation. The second part of the training involves a formal training workshop. Following the project HSI will deliver a training workshop to teach the finer points of the software including systems aspects.

12 8. Hardware and Software The system runs on standard Pentium computers with around 64 MB of memory. More memory will allow larger models to be solved. The operating system should be Windows 95, 98, NT, 2000 or XP. 9. Documentation User Manuals, Training Manuals and Help Files will be provided.