Batch Reactor As A Plant Engineering Essay

hoi polloi reactor As A Plant engine room EssayWhat is a plant unit. All Equipment that make up a plant discount be divided into 3 different categories or levels, the high gearest universe the Plant as a whole, then the plant units and the lowest atomic number 18 the plant items.While the actual plant performs an over any production, the Plant unit refers to the briny comp 1nts of a Plant which perform a major production last of the Plant and without which the Plant nooky not continue its operations. A Plant unit is make up of items but it can be replaced as a whole (Anthony Kelly)In this Plant, the Batch Reactor receives raw substantives from the raw material storage, processes them for a certain amount of fourth dimension then transfers them to the centrifuge provide vas.From the above diagram, it is obvious that the Batch Reactor is a major comp starnt of the plant and from its function it is seen that the reactor must process the raw material for progress to be d o to the next stage of production.I am at that placefore concluding this as my explanation as to why the Batch reactor is a plant unit.Explain Your Reasons For Concluding That This social unit Is Critical For Production.Several Factors determine how critical a piece of equipment is to production. They includeWill the Equipment affect safety in the plant?Will the Equipment not working cause downtime in the plant?How easily can the Equipment be maintained?What is the cost of this criminal support?What is the current situation of the Equipment? (Paul Wheelhouse)Now each of the incidentors can be used to examine the Batch Reactor and after(prenominal) which an educated decision can be make.The Batch Reactor affects the safety in the plant because its function involves the warmthing of chemicals under pressure and its failure readiness cause the let outage of these chemicals or at the worst lead to an explosion in the Plant.If the Batch Reactor was to stop working, there would b e protract downtime until it is icy this is due to the fact that the Reactor performs a major function in the Plant without which further production would come to a halt.The Batch Reactor is made up of a number of different items, some of which can be run-to-failure, but for the most an established schedule of nutrition must be made for. Without such a schedule, keep would be most difficult to carry out.The cost of maintaining the Batch Reactor may vary but if is not correctly attended to one fault baron lead to another even bigger one so the cost of maintaining might increase.The items in the Batch Reactor comport a look plan which is currently not being kept to this means the Equipment requires monitoring to avoid random failure or prolonged breakdown and downtime.On the account of the above facts, it is my belief that the Batch Reactor needs to be labelled as critical.Extract each User Requirements For This Designated whole From The Plant Description. Are There Any Prod uction Windows?What ar User requirements? This simply refers to the specifications that are inbuilt in a piece of equipment so that it might be able to fulfil the end users needs according to those tasks which it is used to perform.In line with the plant description endown on this expositicular Batch Reactor, a number of user requirements can be ascertained and these are magnetic diped belowTo receive 18te of raw materials from the raw material storage.To remain sealed and heat its contents through a preset temperature / time profile by use of a temperature control system consisting of a thermocouple in a temperature pocket, a temperature controller and a control valve.That the control valve regulates the supply of low pressure locomote.That its temperature alarm signal when the temperature exceeds 1250C.That all safety relief valves work in event of an increase of temperature past the safety limit of 1250C.That the bottom run off valve opens when the operation is complete and releases the contents from the Batch reactor to the centrifuge move over vessel by the discharge pump.That the operation lasts 10 hours only.What is a production windowpane? This is a period during production in which aliment procedures can be carried out without causing a halt in production. With emphasis on the Batch reactor it can be seen that there is a production window and this can be explained below.While the fate reactor makes 18te of product every 10 hours, the centrifuge processes this product at a rate of 1.5te an hour i.e. it would have completely used up the 18te of product in 12 hours. Since it takes 10 hours for the big money reactor to work, this would give a 2 hour production window in which it can be justly maintained.Also depending on the capacity of the centrifuge storage vessel, it is possible for the batch reactor to work overtime cream this feed vessel up and then be switched off and maintained while the centrifuge is operated using the formerly store d produce in the centrifuge feed vessel.Extract Any Corporate Requirements for This Unit From The Plant Description.What are integrated requirements? These are the requirements which the upper management or Business sector of the company course plant desire from its industrial operations in order to make a suitable return on its investments (ROI).From the plant description the following corporate requirements can be made belowThat its keeps to its scheduled annual shutdown period of 16 hours during week 40 each year.That all alimony pertaining to the batch reactor abides by the permit to work system which controls all maintenance activities.That the batch reactor achieves a 25 year spirit and that the gearboxes achieve a 15 year life as well.That the batch reactor remains well-painted, clean and tidy at all times.Extract Any Legislative Requirements for This Unit From The Plant Description.What are legislative requirements? These are Plant requirements made by the Law, rules or regulations or the Country in which the Plant operates. They must be utilize in order for the plant to avoid sanctions or being shut down.In this particular plant description they includeThat the Batch Reactor abides by the rules by the FDA and British pharmaceutical Society put in place for their license h olders.All production and maintenance activities involving the Batch reactor comply with the respectable Manufacturing practise (GMP).That the processes involving the Batch Reactor are as okayed by the quality streamer ISO 9002.That the batch reactor conforms to the environmental standard ISO14000.That if used by the pharmaceutic inspection team up, the batch reactor must pass any risk-based inspections based on a DNV methodology that might be carried out.Comment On If just about of The tasks Designed For Shutdown Could be Done During Production Windows Or When The Plant Is Online. Could Any Of These Tasks Be Designated For Completion During Production Windows Be Completed O nline?We have previous explained what production windows are and when a Plant is online refers to when the plant is carrying its usual operational procedures. From the work do previously in section 1.3, we now know that there is a definite 2 hour production window during which the batch reactor can be maintained while the centrifuge is working. In flavor at the life plan for the batch reactor unit, there are a certain amount of tasks that could be done in 2 hours and should be moved from shut down to production window, these areThe replacement of the quash of the CV1 every 2 years.The pressure testing and inspection of the SV1 every 6 years.The optic check of the fomenter every 6 years.The SV2 pressure testing and inspection every 6 years.There is only one task put to be completed when there is a production window and it can be done while the Plant is online. This is the weekly visual check on the Agitator coupling, because if it is checked while online it might lead to the loca tion of which wouldnt have being seen if the equipment was offline.Analyse The Recorded Jobs From The Computer Maintenance Management trunk (CMMS) For This Unit. Is There Any Evidence Which Confirms That The Life Plan Is Being Carried out? Is There Any Evidence To Say If The Life Plan Is Effective Or Not?What is a Life plan? All plant units or manufacturing stages in production are designed to have a certain life. To fulfil this, maintenance plans are put in place to achieve this expected equipment life and if possible, to exceed it. These maintenance plans are called Life plans. (Wheelhouse, 2008)On comparing the life plan of the batch reactor to the computer maintenance management system (CMMS) it can be seen that the life plan isnt being carried out. This is due to the factor that there is a unique difference between the standard time taken to maintain every single unit item in the reactor and the actual time the subscriber line was done in hours, meaning the maintenance done cannot be adequately planned for and could lead to excessive downtime.It can be seen that for this singular reason the life plan of the batch reactor is not capable of being effective.Use The get ins, Plant Description And The Data From The CMMS To Analyse The Unit Into Its Maintenance Causing Items. using the figure 1 shown previously and the figure 2 shown directly above as well as the Life plan and the CMMS, the maintenance causing items can be broken down as done belBatch Chemical ReactorCV1Agitator CouplingTemperature controllerGearboxMotor frontOil sealAgitatorTrimAgitator gear boxReactor watercraftTemperature sensorPumpMotorPump bearingSV1SV2P1V1VesselJacketFigure 3 The Maintenance Causing Items in a Batch Chemical ReactorDevelop your own life plan for these maintenance causing items using the task selection logic for Reliability Centred Maintenance.RCM WORK SHEET transcription CHEMICAL PLANTSUB-SYSTEM BATCH CHEMICAL REACTORSUB-SYSTEMFUNCTIONFUNTIONALFAILUREFAILUREMODEFAIL UREEFFECTCRITICALITYRESPONSETIMEFREQUENCYCV1Regulates supply of lowPressure steam inefficient to supplySteam at all.SuppliesInadequate steamFaulty TrimAbsence or insufficientSupply of steamHighReplace trim3 hrs2 yearly(Production window)Agitator MotorGearboxTransmit exercise to theAgitatorFails to transmit motionTo the Agitator.Broken sealShortage of lubrication damage bearingsWorn gear teethOil leakageDamage to gearboxMediumMonitor vibrationsand check oil color sealand condition.2 hrs (vibrationmonitoring),12 mins oilinspectionMonthly Vibrations, periodical oil seal checks(Online)AgitatorCouplingConnects Agitator motor gearboxto Agitator for motion transmissionDoesnt transmit motionFrom gearbox to agitator.Transmits inadequateMotion.Slackness in fittingDoesnt give agitatorThe necessaryTransmitted motion.MediumTighten coupling asrequired.6 minsDaily (online)TemperatureControllerControls the temperature qualificationsure it doesnt exceed 1250 CUnable to read thecorrect temperatur e.Faulty temperaturesensor .Increase or reductionof reactor temperatureon wrong information.HighRecalibratetemperature sensor.2 hrs2 year (Productionwindow)SV1Releases the pressure steam in thevessel during times of alert.Unable to releaseexcess pressure steamBlockage at valveoutlet.Crack in valvePressure steam isnot released properly orin time.HighInspect, pressure testand recondition ifnecessary.3 hrs6 yearly (Shutdown)SV2Releases excess steam in the jacketin times of alertUnable to releaseexcess steamBlockage at valveoutlet.Crack in valvePressure steam isnot released properly orin time.HighInspect, pressure testand recondition ifnecessary3 hrs per annum (Productionwindow)AgitatorShakes, stirs mixes the rawmaterials in the reactor.Unable to stir or mixRaw materials. change bladesEroded surfaceRaw materials arenot complex properly.MediumRecoat or replace asnecessary.3 hrsRe-coat or replace asnecessary.(Shutdown)JacketMaintain its integrity and containraw materials during processi ng.Leakage of materialsduring processing.Damaged or erodedParts.Contents leak outcausing contamination.HighPressure test andrepair as necessary.5 hrsYearly (Shutdown)V1Releases processed material toP1 pumpProcessed materialsnot releasedLeakage of materialduring releaseBlockage at valveoutletCrack in valveContents not releasedproperly.Contents leak outcausing contamination.HighLeak test and repairif necessary.15 minsDaily test (Online)P1Transfer processed materials fromreactor to centrifuge feed vesselLeaks materialUnable to pumpmaterials at all.Pumps materials atWrong rate.Replace seal ifnecessary.Replace pump ifnecessary.Contents leak.Contents not pumpedproperlyHighConditionmonitoringReplace seal ifnecessaryReplace pump ifnecessary.1.5 hrs(ConditionMonitoring)4 mins (Leaktest)Monthly conditionMonitoring (Online),Daily leak checks(online)Figure 1.4 Life Plan using RCM logic.Compare and contrast between your Life plan with the one described previously, comment on any similarities and differences.There are a number of ways in which my Life plan differs from the one previously given but there are also ways in which both are similar. Some of them are as listed belowTo begin, the first detail that can be noticed when comparing both life plans is that since I used the RCM selection logic, my life plan carries much more details as I included the functions, functional failures, failure modes, failure effect and cruciality of each subsystem or item. This will be particularly useful in settling up priorities as the criticality of each subsystem is set at low, medium or high depending on the considerations of safety, deed and dissemble of the subsystem or item on the rest of the plant.I brainstormed and added more failure modes and their activities than had being previously detect or had activities planned for in the previous life plan so as to further prepare maintenance personnel to be able to rule these failures if and when they do occur.I changed the time frame for certain activities to take into consideration the new 2 hour production window that was discovered earlier. This will table service reduce the amount tasks that are done during a shutdown and therefore cut down the downtime which the plant undergoes.I increased the amount of time to be used to accomplish most tasks due to the fact that in the previous life plan, insufficient time was allocated to these tasks so therefore they couldnt be planned or executed properly within the targets set for them.Now in terms of similarities, I observed that the keep backive maintenance and condition monitoring carried out on the Batch Reactor had matchd breakdowns were kept to a minimum so bearing this in mind, I retained all the activities from the old life plan and continue using them for the various items.I also continued to carry out maintenance activities at the same frequency that was mapped out in the old life plan as I believe that the punctuality with which activities were carried o ut improved the reliability of the equipment.CHAPTER 2Describe The Philosophy of Total deep Maintenance.What is TPM? Total plenteous Maintenance (TPM) refers to a management system for optimizing the productivity of manufacturing equipment through systematic equipment maintenance involving employees at all levels. Under TPM, everyone is involved in keeping the equipment in good working order to minimize production losings from equipment repairs, assists, set-ups, and the like. (http//www.siliconfareast.com/tpm.htm).The goal of TPM is to increase production while at the same time boosting employee morale and pedigree satisfaction. (Venkatesh. J) This is possible because there would be less downtime as TPM is carried out by the Operators on the items or machinery which they use as they, the maintainers and Designers work as a team towards the total elimination of equipment defects in the Plant (Paul Wheelhouse).History of TPMTPM is a Japanese idea that can be traced back to 1951 wh en preventive maintenance was introduced into Japan from the USA. Nippondenso, part of Toyota, was the first company in Japan to introduce plant wide preventive maintenance in 1960. In preventive maintenance operators produced goods using machines and the maintenance group was dedicated to the work of maintaining those machines. However with the high level of automation of Nippondenso, maintenance became a problem as so many more maintenance personnel were now required. So the management decided that the routine maintenance of equipment would now be carried out by the operators themselves. This is known as Autonomous maintenance, one of the features of TPM. The maintenance group then focussed only on maintenance works for upgrades. For pioneering TPM, Nippondenso became the 1st company to receive TPM certification (wikipedia).Why Use TPM?For TPM to be used in an Organisation, everyone from senior management to the operators on the floor must be carried along and made to understand w hy this particular system is being used. For this to happen effectively, the Motives, Objectives and benefits must be fully stated out and properly absorbed. The table below gives a generic illustrationMotives of TPMAdoption of life cps approach for improving the overall performance of production equipment.Improving productivity by highly motivated workers which is achieved by job enlargement.The use of voluntary midget group activities for identifying the cause of failure, possible plant and equipment modifications.Uniqueness of TPMThe major difference between TPM and other concepts is that the operators are also made to involve in the maintenance process. The concept of I (Production operators) Operate, You (Maintenance department) fix is not followed.TPM ObjectivesAchieve Zero Defects, Zero Breakdown and Zero accidents in all functional areas of the organization.Involve people in all levels of organization.Form different teams to reduce defects and Self Maintenance.Direct benef its of TPMIncrease productivity and OPE (Overall Plant Efficiency ) by 1.5 or 2 times.Rectify node complaints. shave the manufacturing cost by 30%.Satisfy the customers needs by 100 % (Delivering the right quantity at the right time, in the required quality.)Reduce accidents.Follow pollution control measures.Indirect benefits of TPMHigher confidence level among the employees.Keep the work place clean, neat and attractive.Favourable change in the carriage of the operators.Achieve goals by working as team.Horizontal deployment of a new concept in all areas of the organization.Share knowledge and experience.The workers get a whim of owning the machine.Figure 4 .TPM tableSource An Introduction to Total Productive Maintenance (Venkatesh. J)For TPM to start properly, the OEE (Overall Equipment Effectiveness) should be calculated and a loss analysis performed to give both a baseline for continuous upgrading and ascertain the improvement priorities.This will allow the operator/ shopping centre maintenance team to prioritize and then contract the 6 classic losses ofBreakdownsSet-ups and changeoversRunning at reduced speedsMinor stops and idlingQuality defects, scrap, yield and reworkStarting up lossesThe above losses add to the direct costs. Implementation of TPM attacks these and other direct (visible) costs as well as indirect (hidden) costs and follows each tincture in the production and supply chain from Management to the human resources to the Machine to the process, then to suppliers and finally to the customers (Willmott and McCarthy).Components of TPMFigure 4 Pillars of TPMSource An Introduction to Total Productive Maintenance (Venkatesh. J)As shown above, TPM is made up of 8 main aspects which when combined present the full TPM package. They areThe 5 S which are primarily the substructure of TPM and involve organising the workplace. These are sorting, systematising, sweeping, standardising and self-discipline.Autonomous maintenance which refers to the o perators handling most or in cases all of the maintenance concerning the machines which they operate.Kobetsu Kaizen means small improvements or changes for the better of the organisation. intend maintenance entails scheduled maintenance which is done to ensure trouble free machines and equipments producing defect free products for total customer satisfaction.Quality maintenance is aimed at providing customer satisfaction by providing the highest quality through defect free manufacturing.Training to give employees a multi skilled edge.Office TPM to ensure administrative efficiency as well.Safety, health and environmental awareness to ensure zero accidents, zero health damages and zero fires (Venkatesh. J).Describe a Case Study Where TPM has been successfully utiliseThe case study which I wish to use is that of RHP Bearings. This RHP Bearings branch which is in Blackburn, manufactures cast iron bearing housings for a variety of uses from agricultural machinery to fairground rides, an d is one of seven RHP manufacturing sites in Europe owned by Japanese group NSK, the worlds second largest bearings manufacturer.How TPM was carried out.NSK acquired RHP in 1990, when the Blackburn site was under the imminent threat of closure because of high costs and the subsequent lack of competitiveness. Employing a staff of 93, TPM was then introduced to the site in 1993 but it didnt see much success till 1996 due to the fact that the earlier efforts to drive TPM had been largely theoretical and the workforce faded to see its relevance to the everyday running of the plant. In 1996 a maintenance company was brought in to do a scoping study of the plant, conduct a workshop and support two pilot TPM projects.The Plant Manager and the TPM facilitator then began to implement measures to ensure TPM was made directly relevant to the jobs of the staff. Operators were sent off to climb over their machines and log problems through a detailed condition appraisal, to establish a foundation for prospective TPM improvements.TPM was piloted on two key machines, the PGM core making machine in the foundry and the Shiftnal sphering machine in the machine shop, using a detailed seven-step TPM writ of execution programmeCollection and calculation of Overall Equipment Effectiveness (OEE) DataAssessing the six lossesCriticality assessment and condition appraisalRisk assessment renovation planAsset care and best practice routinesRegular review for problem solvingTPM is applied to machines of all ages from new to 30 years old, ensuring that older machinery is brought up to modern specification and newer machinery is kept in as-new condition. The TPM was applied at the site by 9 different equipment teams focusing on specific machinery and involving 60% of the workforce. These teams included operators, maintainers, quality technicians and group leaders also drawing on help from personnel with specialist skills when necessary.Each Team developed a standard routine for their resp ective machines usingAutonomous Maintenance System (AMS) boards which show a schematic of the machine then tags with labels to show losses affecting availability, performance and quality. These labels are then used to generate TPM agendas for team meetings.TPM step notices which illustrate the machines progress in TPM seven step programme.Mainpac database which is used to gather machine performance details and calculate the OEE.Key performance indicators which the teams use to accesses their improvement and progress in areas of waste sand, Gas emissions, Kaizen, Customer returns, lost time incidents, injurious accidents, canvas and product conformance.Each team then has an activity board covering subjects such as milestone activities and previous days conformance result among others. To ensure TPM succeeded, Teams had to dedicate substantial time to carrying out laid down activities and held meetings as needed.Benefits of TPMImplementing TPM had both direct and indirect effect on t he production system a combination of which generated major savings at RHP, Blackburn. Major Site-wide benefits were scored in the following areas400,000 running costs savedUnit cost reduced by 21%Scrap reduced by 8%Attracting increased capital investment currently at 15% of turnover and Customer returns reduced by 11%Increased customer satisfactionImproved safety recordEnvironmental and quality awardsImprovement in staff moraleThe two key machines (The Shiftnal sphering and the PGM core making machine) also had major total cost saving OEE improvements as well as other time saving and cost reduction achievements making the TPM well worth it (Willmott and McCarthy).Reliability Centred Maintenance (RCM) As Applied in a Section of a PlantWhat is RCM? RCM is a method for developing and selecting maintenance alternatives based on safety, operational and economical criteria. RCM employs a system perspective in its analyses of system functions, failures of functions and prevention of these functions (Jones, R.B).So RCM requires in-depth of the machinery, detailing all logic problems and their maintenance solutions and as such can be quite time consuming, for this reason it is usually used only on the critical equipment. The use of RCM methodology requires that 7 questions be answeredWhat are the functions of the Asset?What are the functional failures?What causes the functional failures?What happens when the failure occurs?How much does each failure matter?Can we predict or prevent failure and should we be doing so?How should we manage the failure if prediction or prevention is not an option?(Paul Wheelhouse)Now in order to answer the above questions, a System analysis process is used to begin RCM on any section of the plant. This System process will implement several steps, all of which define and characterize RCM and will methodically delineate the information required for the maintenance footprint 1. System selection and Information collection Taking decisions as t o what level of the plant at which to do the RCM and also choosing this system or section based on criticality i.e. based on function and impact on plant and environment.Step 2. System Boundary Definition This involves creating an accurate list of what is or is not part of the section so an accurate list of components can identified and to establish what comes in and what leaves the System(IN and OUT interfaces). This is necessary to ensure the accuracy of the Systems analysis process.Step 3. System description and functional Block diagram This is used to identify and document the essential details of a system that are needed to perform the remaining steps in a sodding(a) and technical fashion. The five separate items are developed in this stepSystem DescriptionFunctional Block DiagramIN/OUT interfacesSystem Component listEquipment historyStep 4. System Functions and Functional failures involves classifying each OUT interface of the system into its functions and identifying the fai lures which might hinder these functions.Step 5. Failure expressive style and Effect analysis (FMEA) involves analyzing each component failure to discover which have the potential to disruption their function and then detailing what exactly these effects could be. This is done using functional failure-equipment matrix.Step 6. Logic (Decision) Tree Analysis (LTA) the failure modes which pass through effects analysis will now go through this process. The purpose of this step is to further prioritize the emphasis and resources that should be devoted to each failure mode on the basis that all Authority (TVA). TVA is a power production plant wholly owed by the US government and equipment, functions and failures are not the same. The LTA identifies the failure modes in 3 aspectsSafetyDowntimeEconomics (Finance)Step 7. Task selection In this step, applicable maintenance tasks which are most effective to combat the detailed failure modes are listed, at the same time decisions on whether to run-to-failure or design out