Batch Reactor Is Widely Used In The Chemical Mechanics Essay

Batch Reactor Is Widely Used In The Chemical Mechanics Essay A batch reactor is widely used in the chemical and process industry to perform several operations such as providing an environment of chemical reactions, crystallization, product mixing, dissolution of solids, polymerization, liquid to liquid extraction as well as batch distillation. The equipment comprises of tank that has an integrated heating and cooling system as well as an agitator. The main advantages of using a batch unit is it ability to perform various function without the need to change or break containment. Toxic and highly potent compounds can be processed in the batch unit. Part one Question 1 a) Explain why you would regard this batch chemical reactor as a plant unit. According to the definition of a chemical plant, a plant is comprised of several units that are interconnected by piping. Materials move in and out of these units. These materials or raw materials are converted into different products. In this example, the batch reactor is a separate unit of the plant which processes the raw materials introduced before feeding them to the centrifuge system. This batch reactor is also the principle chemical converter in this plant. b) Explain your reasons for concluding that this unit is critical for production This unit is critical for the production in this process because It prepares and processes the raw materials by heating them to the prescribed temperature and also providing the required pressure for the process. It ensures full utilization of the centrifuge unit; this is because it produces more than the centrifuge can process. the batch unit produces 18 (te) of product The batch unit is the principle raw material processor in this process, it receives raw materials, process them to complete products, thereafter, these materials are sorted out by the centrifuge. There is no other unit for processing materials in this plant unit. The batch unit temporary stores the materials before they are feed to the centrifuge system. b) Extract any user requirements for this designated unit from the plant description. Are there any production ‘windows? The main user information is; The vessel consist of a jacketed agitated glass lined vessel, heated to a certain temperature and pressure and consist of a thermocouple, a temperature alarm and has a safety relief valve The equipment list is also provided to the plant engineer with information about the different components installed on the plant. The drawing of the batch unit also shows the plant engineer the layout of the different components in the reactor. Jacket safety valve, temperature pocket, temperature controller, steam trap, agitator and the pipe work. The batch reactor process is also described so that the user or the operator can clearly understand how the processes are carried out, for example â€Å"the batch unit starts when 18 (te) of raw materials are introduced to the reactor†, the content are heated through to a preset temperature/ time profile that takes 10 hours† the products are then feed to the centrifuge system. This explanation helps the user or the plant operator understand its operation. d) Extract any corporate requirements for this unit from the plant description Some of the corporate requirements for this unit obtained from the text are: The equipment is shutdown for 16 hours during the 40th week of each year. The production of the batch reactor is also indicated, that is â€Å"the manufacturing unit makes 13,000 te of bulk pharmaceutical product within a given year† The information provided for the batch reactor jacket is also vital to the corporate use. This information is â€Å"the jacket is a registered steam receiver and also has a safety relief valve† The company guidelines state that reactors should be maintained to archive 25 years and gear boxes should be maintained to give 15 years life. e) Extract any legislative requirements for this unit from the plant description. The legal requirements include; The procedure for controlling maintenance activities must conform to the environment standard ISO14000. The manufacturing process must be licensed by FDA and the British pharmaceutical product. The manufacturing activities must comply with GMP (good manufacturing practice) and the process must be to the quality standard ISO 9002. f) Table 1 shows the existing life plan for this unit. Comment on whether you think that some of the tasks designated for the scheduled shutdown could be completed during production windows or when the plant is on-line. Could any of the tasks designated for completion during production windows be completed on-line? From the company maintenance guidelines, it can be seen that the company stipulates a 16 hour shutdown for the batch reactor during it 40th week of operation each year. Various test and maintenance activities are carried out to ensure that the batch reactor archives 25 years life and the gear boxes give a 15 year working life. In addition to the maintenance activities, the industry should be kept clean and painted to ensure that it passes the pharmaceutical inspectors test and prevent unnecessary shutdown. The maintenance activities should however be scheduled in such a manner that they dont interfere or affect the operation of the plant thereby maximizing the profits obtained from the production line. This calls for the scheduling of light maintenance operation to be done when the plant is still operating. Based on this classification, three maintenance operation are carried out for this batch reactor these are On line: these are maintenance activities that run concurrent with the production line. The maintenance activities are performed when the machine is still in use. Proper scheduling must be done to ensure that these activities are well planned for. The online and offline maintenance windows should also not coincide. Offline maintenance: These are maintenance activities that are performed when batch reactor is switched off or some interruption has to occur the machine is shut off and a part in the system is removed or repaired. Back up systems are used. Maintenance window:   this is a user defined period of time in which automatic maintenance activities are carried out. During the maintenance window, the need for maintenance activity is first evaluated, and if the system does not meet the required parameters a maintenance activity is carried out. If the required conditions are met the maintenance activity is not carried out (IBM, 2009). The activity for this batch reactor can be scheduled as follows Activity Comments CV1, replacing trim Currently the machine is shutdown before this maintenance activity is performed, based on the time taken to perform this activity and the frequency, it is best that it is done during the production window. Agitator gearbox Checking the oil Checking the oil seals for leaks   Visual check These activities are performed when the reactor is running, due to their frequency and time required these activities they can be done when the machine is still running(online) Agitator coupling Can be done when the production is progressing (online) as the process takes a short time and is performed often. SV1, pressure test and inspection This is a rigorous activity and can only be performed when the reactor is shutoff. Agitator visual check Does not require to be performed during shut off, it can be done as the machine operates (online) and can also be scheduled during the production window. It can also be performed when the agitator coupling is being checked Internal inspection Pressure test Should be done when the equipment is shutoff as it is a rigorous activity and takes a long time Pressure test and inspection It can be done during the production window. Visual checks for leaks Leak test Vibration monitoring of the motor and pump bearing Should be done on daily basis. The pump motor should also be checked as the leak tests are done. This will help monitor the pump. The checks are done by the plant operator. g) Analyze the recorded jobs from the computer maintenance management system (CMMS) for this unit. (These jobs are shown in a Microsoft Excel spreadsheet called Worklist.xls.) 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? To check and analyze the data recorded on the computer maintenance management systems for this unit. The different maintenance activity was evaluated and the frequency of these activities, as well as the time taken to complete this activity was evaluated. The excel data was first sorted into the various groups of maintenance activities. The obtained data was as follows For the agitator coupling the Visual check annual ticket for weekly task were as follows 8/8/1996 4.33 5.2 Planned 8/8/1997 4.33 5.2 Planned 8/8/1998 4.33 5.2 Planned 8/8/1999 4.33 5.2 Planned 8/8/2000 4.33 5.2 Planned 8/8/2001 4.33 5.2 Planned 8/8/2002 4.33 5.2 Planned 8/8/2003 4.33 5.2 Planned From the table the maintenance activities were carried out as per the schedule and the activities took a longer time than was actually planned for. were as planned for. For the agitator visual check, the table is as shown in the figure below 3/3/1996 2 4 Planned 3/4/2002 2 4 Planned The activity interval time was 6 years between subsequent maintenance activities and this was carried out as per the life plan specifications. They however took more time than was specified. For the oil seals, the maintenance information was as shown in the table below; Check oil seals and for leaks annual ticket for weekly task 7/7/1996 8.67 10.4 Planned Check oil seals and for leaks annual ticket for weekly task 7/7/1997 8.67 10.4 Planned Check oil seals and for leaks annual ticket for weekly task 7/7/1998 8.67 10.4 Planned Check oil seals and for leaks annual ticket for weekly task 7/7/1999 8.67 10.4 Planned Check oil seals and for leaks annual ticket for weekly task 7/7/2000 8.67 10.4 Planned Check oil seals and for leaks annual ticket for weekly task 7/7/2001 8.67 10.4 Planned Check oil seals and for leaks annual ticket for weekly task 7/7/2002 8.67 10.4 Planned Again the time taken was longer, however the maintenance was according to the life plan. For the vibration monitor gearbox and checking of the motor bearing, the data for year 1996 and 2002 is as shown in the table below; Vibration monitor gearbox motor bearings 2/10/1996 1 2 Planned Vibration monitor gearbox motor bearings 3/10/1996 1 2 Planned Vibration monitor gearbox motor bearings 4/10/1996 1 2 Planned Vibration monitor gearbox motor bearings 5/10/1996 1 2 Planned Vibration monitor gearbox motor bearings 6/10/1996 1 2 Planned Vibration monitor gearbox motor bearings 7/10/1996 1 2 Planned Vibration monitor gearbox motor bearings 8/10/1996 1 2 Planned Vibration monitor gearbox motor bearings 9/10/1996 1 2 Planned Vibration monitor gearbox motor bearings 10/10/1996 1 2 Planned Vibration monitor gearbox motor bearings 11/10/1996 1 2 Planned Vibration monitor gearbox motor bearings 12/10/1996 1 2 Planned For the 2002 data Vibration monitor gearbox motor bearings 1/10/2002 1 2 Planned Vibration monitor gearbox motor bearings 2/10/2002 1 2 Planned Vibration monitor gearbox motor bearings 3/10/2002 1 2 Planned Vibration monitor gearbox motor bearings 4/10/2002 1 2 Planned Vibration monitor gearbox motor bearings 5/10/2002 1 2 Planned Vibration monitor gearbox motor bearings 6/10/2002 1 2 Planned Vibration monitor gearbox motor bearings 7/10/2002 1 2 Planned Vibration monitor gearbox motor bearings 8/10/2002 1 2 Planned Vibration monitor gearbox motor bearings 9/10/2002 1 2 Planned Vibration monitor gearbox motor bearings 10/10/2002 1 2 Planned Vibration monitor gearbox motor bearings 11/10/2002 1 2 Planned Vibration monitor gearbox motor bearings 12/10/2002 1 2 Planned Again the life plan was strictly followed and all maintenance activities planned were carried out every month. For the pressure test (SV2), again the maintenance activities followed the life plan Pressure test and inspect 9/6/1996 2 3 Planned Pressure test and inspect 9/6/1997 2 3 Planned Pressure test and inspect 9/6/1998 2 3 Planned Pressure test and inspect 9/6/1999 2 3 Planned Pressure test and inspect 9/6/2000 2 3 Planned Pressure test and inspect 9/6/2001 2 3 Planned Pressure test and inspect 9/6/2002 2 3 Planned For the pressure test and inspection to determine if reconditioning was required, the maintenance was as scheduled and took place after 6 years as shown in the table below; however the time for the activity was longer than it was expected. Pressure test and inspect 3/3/1996 2 3 Planned Pressure test and inspect 3/4/2002 2 3 Planned For the steam jacket, the life plan was followed but again the allocated time was short. Despite the carefully planned maintenance activities, there were some reactive maintenance activities these resulted from detection of anomalies in the system. Some of these activities are shown in the table below. Component Item Activity Date Standard time Actual time Type of job Reactor P1 Replace leaking mechanical seal 7/2/1996 4 4 Reactive Centrifuge P2 Replace mechanical seal 1/18/1997 2 3 Reactive Reactor T1 Re-calibrate temperature sensor 9/1/1998 2 3 Reactive Raw Material Storage P3 Replace seal 11/16/1998 5 5 Reactive Centrifuge P2 Replace mechanical seal 3/29/1999 2 4 Reactive Centrifuge P2 Replace mechanical seal 5/18/1999 2 2 Reactive Raw Material Storage P3 Repair plinth impact damage 10/1/1999 4 4 Reactive Raw Material Storage P3 Repair seized pump 10/3/2000 12 12 Reactive Reactor T1 Re-calibrate temperature sensor 4/17/2001 2 2 Reactive Centrifuge T3 Replace temperature sensor 6/25/2002 2 2 Reactive From this analysis it can be seen that maintenance operations were done as scheduled and planned. However, most of the activities took a longer time than was scheduled. The planned maintenance operations were not wholly effective as reactive maintenance operation were performed. h) Use your experience in conjunction with Figures 1 2, the plant description and the data from the CMMS to analyze the unit into its maintenance causing items From the diagrams 1 and 2, the main areas that are likely to fail include The major maintenance causing units are; (i)The steam unit The unit comprises of the safety valves, the steam jacket, the steam jacket safety valve, the Globe control valve etc. these units are bound to fail and cause critical damage to the equipment as well as the manpower manning the plant. Their maintenance is critical. (ii)The agitator unit: Comprises of the agitator, the agitator motor, the motor gearbox and coupling. The gearbox and the drive mechanism are bound to fail due continuous use as well as the forces acting on the agitator. Bearing wear are also likely to cause vibration on the shaft. (iii)The reactor unit The reactor unit, the reactor safety valve SV2, the safety valve discharge pipe work is also likely to cause plant failure and should be checked regularly. (iv)The centrifuge The centrifuge system is also critical in the operation of this plant and is likely to cause major maintenance problems. Some of the maintenance checks include; testing the motor bearing, checking the vibration on the machine, checking the wear on the seals of the centrifuge, physical check of the centrifuge as well as checking its drive motor and the valves leading to the pump and out of the pump. The minor units likely to cause maintenance problems are: (v)Temperature sensor calibration The failure of the temperature alarm to detect increase in temperature beyond 125 degrees. This is due to a faulty temperature sensor. This calls for regular temperature sensor control, calibration and testing if the system works according to the set parameters. (vi)Checking the pipes Checking of the pipe work for any leakage should also be done. Checks should be done regularly. (vii)Checking the pump for proper workability Pump delivering materials to the centrifugal unit should be checked. Some checks include the driving motor vibration tests, the motor starter tests as well as the functioning of the motor tests. Tests should be performed every month through physical checking of the motor. The agitator motor should also be checked to determine if its working at its rated torque and speed. (viii)Checking the steam trap The steam trap and the heat exchanger should also be regularly checked, this is because it cools the steam efficiently. The condenser should be checked for any leakages, blockages, wear, temperature and heat dissipation as well as its performance and efficiency. Tests involve both the physical checks as well as specialized tests using thermometers and thermocouple sensors to detect if the heat loss in the steam trap is sufficient enough. Checking the raw materials storage The warehouse used to store the raw materials should be regularly inspected to ensure that the materials are not contaminated. Presence of excess water, humidity, temperature and pests may damage the raw materials resulting to inferior products. Checking the raw materials feed mechanism The raw material feed mechanism should be checked to ensure delivery of materials to the batch reactor with ease. The motor used to run the feedstock should be checked, the physical leakages should also be checked and other component of the feed mechanism. The test should be done every month. Checking the paint coating Involves the Physical inspection of the plant to ensure that all the parts are not rusted or the paint has not been scourged. These tests are obligatory to ensure conformity with the pharmaceutical inspectors rules and regulation. The inspection can be done every year. i) Develop your own life plan for these maintenance causing items using the task selection logic for Reliability Centered Maintenance For the implementation of RCM the following main tasks are carried out; Selection of the equipment to perform analysis Identification of potential failures Identification and evaluation of the effects of the started failures Identification of the causes of failure Selecting the maintenance tasks Maintenance packaging 1) Selection of equipment to perform analysis on; The main equipments to perform analysis on are;  · The batch reactor  · The centrifuge  · The steam jacket  · The centrifuge motor  · The raw materials handling equipment The identification of potential failures and the causes of failure The potential problems that are likely to occur are BATCH REACTOR The agitator  · The agitator motor failure  · The agitator gearbox failure  · The agitator coupling failure The centrifuge  · Centrifuge discharge pipe failure  · The centrifuge pump may fail  · The pump motor failure  · The piping system may fail The steam jacket  · Failure of the reactor safety valve  · Failure of the safety valve  · The temperature alarm system failure  · The failure of the pressurized steam pipe network. Sensors and alarms  · Failure of the temperature controller  · The globe control valve failure  · The steam trap Raw materials feed system  · Failure of the inlet pipe work  · Failure of the motors conveying the raw materials The table below shows the maintenance strategy developed after conducting a RCM analysis. Table 1: RCM analysis Item Causes of failure Maintenance activity Frequency of maintenance Time for maintenance The agitator The motor (1)Brush wear (2)Winding may overheat (3)The motor starters may fail Checking the motor 3 months 2 hours The gearbox (oil gearbox ) (1)The viscosity of oil may reduce lubricity Testing the oil viscosity 3 months

Cultural and Technical Metaphors Essay -- Language Linguistics

Cultural and Technical Metaphors Intro Everyday conversation is riddled with metaphoric analogies. Most often, they go unrealized by the speaker as well as the listener. Merriam-Webster's Online Dictionary defines a metaphor as â€Å"a figure of speech in which a word or phrase literally denoting one kind of object or idea is used in place of another to suggest a likeness or analogy between them (as in drowning in money)† (Metaphor 1). Metaphors are a quick and simple way of relating a message without divulging unnecessary details that would otherwise cloud the ultimate point. This is especially useful in technically related fields and subjects such as Information System Management (IS). IS is responsible for the management of computers, networking, and data that supports different levels of decisions at different levels of the organizational hierarchy (What is IS? 1). Even as the technical functions of computer systems develop new and detailed complexities, everyday users, not familiar with the ins and ou ts of their particular system, are able to effectively communicate problems or concerns to trained professionals. Similarly, experts in the Information Technology (IT) field are able to explain to users how to manage their systems using heuristically tested metaphors such as â€Å"desktop† and â€Å"recycle bin† which have become standard jargon/usage. Just as different fields of study adopt their own list of commonly accepted metaphors, the use of metaphors crosses lines of culture and ethnicity as well. Body Common Metaphors Sitting about 400 miles south of the US mainland is the tiny island of Jamaica. Known for its beautiful beaches and clear waters, Jamaica has become a great vacationing spot. It is also the birthplace... ... â€Å"Metaphor†. Merriam- Webster's Online Dictionary. 2006-2007. Merriam-Webster.com. 4 June 2007. â€Å"Rasta/Patios Jamaican Phrases and Proverbs†. 15 June 1997. Croal Islands Associates. 4 June 2007. â€Å"Renà © Descartes†. Wekepedia.com. 4 June 2007. Wekemedia Foundation Inc. 5 June 2007. â€Å"Songs of Freedom: The Music of Bob Marley as Transformative Education†. 2005. ReligiousEducation.net. 4 June 2007. â€Å"What is IS?†. Webopedia.com. 24 April 2007. Internet.com. 9 June 2007.

Shakespeare Sonnet Compare and Contrast Essay

Sonnet Compare and Contrast Essay Love can be expressed and described in many different ways. Shakespeare`s sonnets â€Å"116† and â€Å"18† justify that love has the ability to create extremely powerful feelings between two people, which can help them achieve the ultimate sense of happiness. To that end, when people experience true love they live a more joyful and content life. When a person finds love their lives are filled with joy and pleasure that bring true happiness into ones life.In sonnet â€Å"116†, Shakespeare writes that love should be; â€Å"an ever fixed mark, / That looks on tempests and is never shaken,† (lines 4-5). Shakespeare is speaking of a building that could never be destroyed. This quote carries a metaphor within it, by referring to love as a sturdy building. True love should never collapse; it should always hold fast and be strong no matter how dire a situation is. The metaphor also brings to light the idea that love can empower a person by creating a sense of strength and stability in between the two people that share it.In sonnet â€Å"18,† Shakespeare is able to justify that when one is in love, one will always see the beautiful side of the person they admire. This is described in lines 9-10 â€Å"[†¦] thy eternal summer shall not fade, / Nor lose possession of that fair owest;† Shakespeare is comparing a glorious and never ending summer to how a person views their true love. Through the lover’s eye, beauty and youth will never fade. This quote also contains a hyperbole, one cannot be youthful forever, just like summer does not last all year, but in the eyes of those in love beauty doesn’t change and summer doesn’t turn to fall.One that has experienced true love has a enhanced view on life, and becomes deeply invested into their soul mate. In both poems, Shakespeare declares that when two people are in love, they in turn create deep enthusiasm for another. A person i n love see`s eternal beauty in the other. Sonnet â€Å"18† compares â€Å"thee to a summer`s day? / Though are more lovely and temperate† (lines 1-2). Shakespeare uses a comparison to a beautiful summer day, to explain that a person in love believes that their soul mate is lovelier.By using an association with something tangible like the warmth and beauty of summer, Shakespeare is able to validate the couples enthusiasm and intensity of feelings for each other. As shown in sonnet â€Å"116† metaphors are also used to show love, Lines 4-5 provide an even deeper and more significant meaning for this sonnet. The metaphor makes love seem like an unbreakable structure, one that is built on trust, admiration, and no doubt of wavering feelings. Lines 4-5 contain examples of diction such as, â€Å"never,† â€Å"shaken,† and â€Å"tempest†.Diction is used in this quote to create a deeper meaning and emphasize on how firm the structure should be. The word â€Å"never† gives a sense of confidence that nothing will ever be destroyed and the love will always be the same. Love creates enthusiasm within a person, causing them feel a deep compassion for another, but love also makes a person stronger by guiding them through problematic moments Love should be able to guide people through hard times and support them when they need it most.The quote in line 2-5 of Sonnet â€Å"116† is very metaphorical because the quote implies that love should be strong and will never let a person down no matter how hard the situation is. As Shakespeare said, â€Å"Love is not love, Which alters when it alteration finds, Or bends with the remover to remove,† he refers to love as being something tangible, as a solid unbreakable object. By doing so, he explains that true love cannot just come and go with the tide or the wind but that it is a stable and durable fixture. Love should not only make a person stronger, it should also have th e ability of guiding and giving advice to a lover.In Sonnet â€Å"116† line 7, Shakespeare states that love is, â€Å"the star to every wandering bark†. This phrase compares the North Star, which is used by different vessels, as a guide to love. The vessel is a lost and hopeless soul but the star is love which helps guide a person to happiness. Once a person finds their rock, they are able to grow and have confidence knowing that they have somebody to support them. Shakespeare`s sonnets â€Å"116† and â€Å"18† validates that love is a powerful connection between two people.

Ideological Diversity On Weekly News Magazines - 1402 Words

Theodore Assatly Course #5487 2155OL: Understanding Mass Media July 31, 2015 IDEOLOGICAL DIVERSITY IN WEEKLY NEWS MAGAZINES Ideology is defined by Dictionary.com as â€Å" a body of ideas that reflects the beliefs and interests of a nation, political system, etc. and underlies political action.† (â€Å"Ideology†) Weekly magazines, in fact all media, are infused with ideology. Its existence is inevitable. While news magazines strive to provide ideological diversity, the bottom line is that most media exists to promote some sort of ideology. Campbell Brown discussed this topic tonight on Fox News’ Media Buzz. â€Å"When asked if she’s a journalist or an advocate, she revealed she doesn’t think journalists can be truly objective, pointing out that every reporter comes to the story with their own bias.† (http://video.foxnews.com/v/4363481632001/campbell-brown-hits-tv-news/?#sp=show-clips). 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