Dear all When I want to deploy something in Navigator - DeltaV Executive Portal so I can update the DeltaV Executive Portal Web View, I keep getting the same error. It says: "Timed out trying to initiate deploy. Check that the configuration server is running." I checked and the configuration server is running. I'd appreciate the help. Kind regards
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Forum Post: Deployment in Navigator - DeltaV Executive Portal
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Forum Post: Logic for Plant Wide Priority Alarms
I am developing logic that will perform certain actions (e.g. enable an output) if a certain priority alarm is active/unacknowledged. I want the logic to apply for alarms in all areas (single DeltaV zone). Currently I have logic that uses the Operator_Station_Name/Horn (with the station in all alarm areas) to see what priority alarm is active but I am not sure this is the most reliable or effective way to perform this task. One of my concerns is the behavior Horn value. Does it hold and maintain the first alarm priority that triggers the horn regardless of subsequent alarm or does it continuously update with each new alarm priority? For instance if I get a priority 14 alarm and a few moments later a priority 15 (with no silence of acknowledgement by the operator), does the Horn contain 14 or 15 as the final value? Any ideas on a better way to go about this?
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Forum Post: RE: Logic for Plant Wide Priority Alarms
You have set out an interesting challenge for yourself. I'm not sure exactly what you are trying to accomplish but a brief review of the Alarm system in DeltaV might be helpful. As you know, DeltaV alarms are hosted in Control Modules running in the controller. The alarms report to each console based on Plant Area assignments to each workstation and based on the logged on user's span of control, enabling the Alarm server on each workstation to manage the alarms by priority and state. The alarm parameters are also available as runtime data for display in graphics or for reference by other control modules. The Alarm server in the workstations provides mechanisms to generate alarm lists, and the workstation "ALARM" parameters as documented in books on line can provide different views of alarms grouped by THISUSER, Plant Areas and Units. The HORN parameter is driven by the Alarm Banner's top priority alarm, and when this is a new alarm, the associated priority sound is triggered. Acknowledging the horn does not acknowledge the alarm, so the horn is not a measure of the current highest priority unacknowledged alarm. In each Module, there is also the ALARM parameter that will host the highest priority alarm currently on the module. This is an Array with the first element holding the highest priority alarm. BOL has quite a bit of information on these parameters that you should understand. Note that the console level Alarm parameters are only available to DeltaV Operate and are not available for reference in control modules. Something to consider. In v13, Emerson has released some templates for dynamic alarm suppression. This allows a group of modules and their alarms to be monitored and action taken on certain alarm combinations to minimize alarm flood conditions. By having multiple such modules, you break the problem into manageable chunks and could create supervisory type modules for more global actions. If you want to manage all alarms in the system, you could dedicate a workstation for this purpose, using the Alarm Server and workstation alarm lists to monitor process and other alarms/alerts. This workstation would have all areas assigned and would have a low priority user that can basically only view alarm data. You could create an associated module (assigned to the Pro Plus or an App Station) to "publish" information or to drive Outputs (assign this module to a controller). The workstation scripts could also be written to access an EJournal Database to query and report on alarm system activity that includes alarms that are no longer active or unacknowledged, as these will not appear in any alarm lists during run time. By using the workstation alarm server and alarm arrays, you can let the system provide you with sorted alarm information. Hope this was helpful.
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Forum Post: RE: User Manager & DeltaV Operate Configure
Dave, There is no simple means to determine user security access via DeltaV Operate Scripts. In the cases where user name is used to determine OPERATE behavior (i.e. hide or show a button), it is typically done by having a short list of permitted users encoded in a script ( or a short list of denied users), and you set that up manually. For more ambitious users, the USERT.SCR file, along with the WLNAMES and ANT, could be parsed by a function that can check if a User has a particular privilege or LOCK assigned. Note that these files are system generated and Emerson does not support their use by users. What that means is, the content and structure of these files may change, and this would not be announced or documented. In other words, don't call the GSC complaining a hotfix or upgrade broke your function. Also, DO NOT attempt to modify any of these files. These are structured text files. in the USERT file, there are multiple entries for each user, based on Plant Areas, and for BPCS and SIS. USERI { NAME='ADI' DOMAIN='PLANTWEBCAL.DELTAV.SYSTEM.LOCAL' AKEYS { AREA=1 WLOCKS='1,2,3,4,5,6,17,18,19,20,21,22,23,16,15,14,13,12,11,10,9,8,7' } } Write Locks are listed with the index. The WLNAMES file can identify the index's Name. ITEM { WLOCKS=18 NAME='Can Configure'} If I want to know if a user has "Can Configure" for BPCS, that is a site wide key and will be in none or all the areas for that user. So searching the file for the first instance of the NAME, I find the line starting with "AKEYS" for BPCS or "SISAKEYS" for SIS, and parse that line to find ",18," which is the index for "Can Configure". The example above shows the write locks for AREA = 1 (AREA_B, or whatever you named it) If you were looking for say a special privilege, like Tuning or User Lock 04. these are assigned per area. You might need to check all the areas for that user. Not a big deal as your function would loop through the file reading each line checking for user, then area then lock, as needed. Now, you will need a trigger to call this function, which would be whenever the current user changes. When someone logs onto the console, and starts OPERATE, you can set the appropriate flag parameter for your hidden icons and such. When the Current User changes, you update this flag and that changes the visibility of those icons. You'll have one function to check during an upgrade based on any changes that may or may not occur to these source files. Note that you want to keep this simple, and have solid error checking so you don't cause an issue with user logon actions.
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Forum Post: RE: User Manager & DeltaV Operate Configure
Dave, The runtime privileges and user information in DeltaV does not include Group information used in User Manager. The Groups in User Manager are a method to create privilege profiles and assign those write locks/keys to users. Whether the key is assigned explicitly, or via a group, the result is a collection of keys for each area for each user, and this is what is downloaded to each console. In addition to the DeltaV write locks, each user is placed in some Windows security groups to give them access to the windows applications, allowing them to launch, or save files etc. I'm not aware of any other functions that expose User privilege in Operate. What "narrow permission levels" did you get and how did you get that.
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Forum Post: RE: User Manager & DeltaV Operate Configure
Well it's not everyday I can add to an answer that Andre has given so I'll jump on this opportunity ;-) If you don't want to parse the user.scr file, here is an easier option. In operate you can use "THISUSER. " to get a whole bunch of information, a few that are particularly useful in this case: 1) THISUSER/USER_CAN[AREA_NAME][LOCK_NAME] .F_CV "The user (THISUSER) has the key to a particular lock. If the logged on user does not have either the key or the key for the area specified, the parameter returns False (0). Spaces are not permitted for area names or lock names" 2) THISUSER/IS_ADMIN_USER.F_CV "The user has admin privileges" 3)THISUSER/CAN_INSTALL.F_CV "The user has Install privileges" 4)THISUSER/CAN_CONFIG.F_CV "The user has configure privileges" 5) If writing a script, you can use frsUserConfigPrivChk ( ) which will return a Boolean if the user has config privileges. There are additional parameters that can be set/looked at by opening the "DeltaV Operate Pictures Help" (Open the animation wizard and click help) and searching for "THISUSER Workstation Parameters" So one idea is that if you have any unused locks, you could use that to give users "full graphics access" and look for that key once a user logs in and change the picture navigation strategy. Good Luck!
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Blog Post: Integrating Single Use Equipment More Easily with Control and Manufacturing Execution Systems
One of the trends in the biopharmaceutical industries that have taken root over the past decade and a half is the use of single-use, disposable equipment in the manufacturing process. Prior to their use, these facilities relied on inflexible, hard-piped equipment. An American Pharmaceutical Review article highlights the benefits of single-use equipment: Single-use disposable devices and systems have reduced overall contamination rates, enhanced production throughput efficiency resulting in decreased manufacturing operation and maintenance costs. Recent collaborations between leading filtration, container /closure, mixing and fermentation / cell culture suppliers has resulted in fully integrated Single-Use Disposable Bioprocessing Platforms and Systems (SUS.) I caught up with Emerson’s Zuwei Jin about this trend and how it affects the process control and manufacturing execution strategies. Zuwei explained that single-use equipment is getting more and more popular in Life Sciences industry, particularly for upstream bioreactors and buffer/media preparations. From an economics perspective, total cost of ownership on a commercial scale is better than the traditional stainless steel, fixed installation approach. He notes that single use plus manufacturing execution systems (MES) also seems to be the fastest approach to “proof of concept” of a new drug. The challenge comes from the process control and manufacturing execution side of things. Some of these challenges include the setup of the verification/flowpath confirmation, verification of the equipment process connections from material item scanning, and how the procedural control logic and recipe designs are engineered to name a few. As Zuwei and some of the DeltaV and Syncade technologists were thinking about these challenges, the idea hit them to develop an interface for single use process verification/qualification instead of the traditional MES procedural control way. This object-oriented interface would be developed to collect parts/lots information of the single-use components and feed back to the MES. Proximity switches would be used on the clamp/holders connecting the single-use equipment to the process piping. These switches would alert the control and execution strategies that the equipment was connected and ready to be used. Additional integrity tests were included to further assure that these connections were properly secured. The idea of these clamps with proximity switches is that they would have multiple touching points to each side with a digital input back to the control system which might be wired or wireless. Once all the connections are confirmed this equipment setup information and bill of materials is compared and verified with the material information that is stored and verified in the MES. With the checks completed, the single-use equipment is made active and ready for use in the batch process. These ideas are another example of the Industrial Internet of Things taking simple items like clamps, which connect single-use equipment to the process piping, making them intelligent, and using this intelligence as part of the control and manufacturing execution strategies to simplify the configuration, ongoing maintenance and improved information for the electronic batch record required to sell the manufactured product. You can connect and interact with other pharmaceutical and biotech experts in the Life Sciences group in the Emerson Exchange 365 community. Related Posts Trends in the Life Sciences Industry Bridging Islands of Automation Impact of Single Use Technologies on Automation and Information Management What to Do When the DeltaV Calc Block Is Not Enough Wireless Applications in Life Sciences Planning Process for Life Science Optimization Projects The post Integrating Single Use Equipment More Easily with Control and Manufacturing Execution Systems appeared first on the Emerson Process Experts blog.
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Blog Post: Integrating Single Use Equipment More Easily with Control and Manufacturing Execution Systems
One of the trends in the biopharmaceutical industries that have taken root over the past decade and a half is the use of single-use, disposable equipment in the manufacturing process. Prior to their use, these facilities relied on inflexible, hard-piped equipment. An American Pharmaceutical Review article highlights the benefits of single-use equipment: Single-use disposable devices and systems have reduced overall contamination rates, enhanced production throughput efficiency resulting in decreased manufacturing operation and maintenance costs. Recent collaborations between leading filtration, container /closure, mixing and fermentation / cell culture suppliers has resulted in fully integrated Single-Use Disposable Bioprocessing Platforms and Systems (SUS.) I caught up with Emerson’s Zuwei Jin about this trend and how it affects the process control and manufacturing execution strategies. Zuwei explained that single-use equipment is getting more and more popular in Life Sciences industry, particularly for upstream bioreactors and buffer/media preparations. From an economics perspective, total cost of ownership on a commercial scale is better than the traditional stainless steel, fixed installation approach. He notes that single use plus manufacturing execution systems (MES) also seems to be the fastest approach to “proof of concept” of a new drug. The challenge comes from the process control and manufacturing execution side of things. Some of these challenges include the setup of the verification/flowpath confirmation, verification of the equipment process connections from material item scanning, and how the procedural control logic and recipe designs are engineered to name a few. As Zuwei and some of the DeltaV and Syncade technologists were thinking about these challenges, the idea hit them to develop an interface for single use process verification/qualification instead of the traditional MES procedural control way. This object-oriented interface would be developed to collect parts/lots information of the single-use components and feed back to the MES. Proximity switches would be used on the clamp/holders connecting the single-use equipment to the process piping. These switches would alert the control and execution strategies that the equipment was connected and ready to be used. Additional integrity tests were included to further assure that these connections were properly secured. The idea of these clamps with proximity switches is that they would have multiple touching points to each side with a digital input back to the control system which might be wired or wireless. Once all the connections are confirmed this equipment setup information and bill of materials is compared and verified with the material information that is stored and verified in the MES. With the checks completed, the single-use equipment is made active and ready for use in the batch process. These ideas are another example of the Industrial Internet of Things taking simple items like clamps, which connect single-use equipment to the process piping, making them intelligent, and using this intelligence as part of the control and manufacturing execution strategies to simplify the configuration, ongoing maintenance and improved information for the electronic batch record required to sell the manufactured product. You can connect and interact with other pharmaceutical and biotech experts in the Life Sciences group in the Emerson Exchange 365 community. Related Posts Trends in the Life Sciences Industry Bridging Islands of Automation Impact of Single Use Technologies on Automation and Information Management What to Do When the DeltaV Calc Block Is Not Enough Wireless Applications in Life Sciences Planning Process for Life Science Optimization Projects The post Integrating Single Use Equipment More Easily with Control and Manufacturing Execution Systems appeared first on the Emerson Process Experts blog.
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Forum Post: RE: User Manager & DeltaV Operate Configure
Thanks Tyler. I tried to find some user information in BOL, and having never used this, I did not find it. Thanks for pointing us to the DeltaV Operate Pictures Help. Much better answer.
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Forum Post: 3051SFC Orifice Plate Change Potential
Hi Everybody, Love this place, as it is my ultimate help centre. I have some 3051SFC conditioning compact orific meters for DN50 Sch 80 pipe that currently have a 0.65 beta. I am currently at the low end of my range 3 transmitter, and so to boost the DP (kPa), I was thinking of just remounting the transmitters to the smaller 0.4 beta orifice (I have used the daniel orifice flow calculator and a 0.04 kPa DP on 0.65, is above 0.34kPa DP on 0.4 beta for the same process conditions. This obviously takes the noise out of my current lower flow readings. So the questions: 1. Is this possible? (My training says yes, but may need a recal to ensure meter reads correctly). 2. Does someone know the ballpark cost and time to do this (per meter- I have up to 5 that I would be doing a rotational replacement on?) 3. Is it field replaceable or factory return work? Your help is greatly appreciated. Thanks, Kitndavj
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Forum Post: Temperature and DP effects for low flow systems
Hi All, I have some 3051SFC meters that are in a lower than anticipated flow process. The process also utilises a back pressure regulator on the downstream side to maintain pressure on the meter. What I am seeing is that over a 24 hour period the DP is following a diurnal pattern. From mid-late evening it is relatively flat DP (system is showing 0.02kPa), then in the morning as the temperature increases, the DP rises (up to 0.06 kPa DP), over the flow cutoff, and peaks around 11am. The DP then suddenly drops over the midday-afternoon period (often to negative DP as low as -0.02 kPa reported) although the system will maintain an actual flow that will keep a flare burning (yes I know this doesnt have to be much but should the system be reporting negative at all if flow is present?). This then stabilises out in the mid-late evening- then recommencing the cycle again. The meters never seem to zero correctly, although visits by techs to the field do not raise any issues from the systems. Question: 1. Should we trim the DP zero at the time when the meter reads the most negative (but this would also boost the flow in the morning value- so leads to questions of accuracy)? 2. Can the DP value be completely dominated by temperature in this case? 3. Does this lend question to the accuracy of the meters as a whole? As always, your knowledgeable help is greatly appreciated. Thanks, Kitndavj
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Forum Post: RE: Redundant controller and switchover
DeltaV 12.3 It is necessary to bring the occurance of a gap in records (due to a switchover) to the attention of the owners of the area. Alarms are monitored by the relevant area teams. Events not so much (in comparison). By bringing the switchover "event" to an "alarm" and posting this to the area of concern the area team are aware. This is important. The area team are obligated to follow SOP and reconcile any gap in records to the actual. There is no "reponse" to the switchover itself. The response is to the gap in records due to a switchover.
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Forum Post: RE: Redundant controller and switchover
solution : sys stat function to detect switch over
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Forum Post: RE: User Manager & DeltaV Operate Configure
Hi Andre, Thank you for your thorough reply and the valuable information. I've just recently discovered the SCR files and the treasure trove of useful information they contain. When I referred to the narrow permission levels, I'm talking about at least one specific VBA functions that will return a boolean response. I say at least one because the only one I have found so far is: frsuserconfigprivchk. Dave
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Forum Post: RE: 3051SFC Orifice Plate Change Potential
Hi Kitndavj, What you're suggesting is absolutely possible. You would order a Rosemount 405 model number (primary element only, your local representative can help with the exact model number) and remount the transmitter to the new primary element with smaller beta. Cost would have to also come from your local representative. It is recommended that the transmitter mounting be done in an Emerson service center to ensure no DP shift. The replacement could also be done in the field, but a small DP shift is possible due to the bolting stresses. Hope this is helpful. Best Regards, Dan
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Forum Post: RE: Temperature and DP effects for low flow systems
Hi Kitndavj, This certainly fits the pattern of temperature effects. Is the transmitter exposed to the sun? With the low DP values you're running on these meters, we'd need a bit more information on installation to troubleshoot and provide the best recommendation. Could you send this information to RMT-NA.SpecialistDPFlow@emerson.com? We should then be able to model the system and provide a recommendation to get these meters straightened out. Best Regards, Dan
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Blog Post: Implementing Lasting Lean Improvement
Have you registered for Emerson Exchange this year? If not, make sure to register by August 31 and save $400 off the regular conference registration price . This week we are highlighting a session being led by Grant Eldred discussing lean improvement strategies. During this session, Grant will describe the lean journey that the Emerson Rosemount Vortex flow meter manufacturing line in Eden Prairie, MN embarked on to identify and eliminate waste from the manufacturing process. Implementing this process reduced lead times and first pass yields soared. With rising labor rates and an increasing demand for a speedy delivery, it is critical to run your manufacturing process efficiently with high, first-pass yields. Bringing a new factory on line creates an opportunity to streamline processes before duplicating them. Emerson implemented a 5-step process to identify and cut out waste before duplicating manufacturing cells at a new global manufacturing site. By starting the roll out in two manufacturing cells and sharing tangible successes, the lean culture grew to include the entire manufacturing floor. This continuous improvement set the stage for a successful startup at an entirely new manufacturing location. To learn more about best practices and how to implement this lean strategy in your operation, make sure to attend this Emerson Exchange session (Cut the Fat and Keep It Off - Implementing Lasting Lean Improvement) as well as interact with subject matter experts below in the comment section.
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Forum Post: Stories from the Emerson Global Users’ Exchange live long after the event ends...
This year, we want to reward the best storytellers. What is your favorite memory from Exchange? Why do you want to attend for the first time? What’s your favorite part of the event? This month only, 3 winners will receive free registration (a $995/value)!!! Please visit the Austin 2016 event group in the community for contest instructions: http://bit.ly/2aMRvSA
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Blog Post: Avoiding Corrosion while Increasing Urea Production
Author: James Gremillion One of the key problems urea plants face is corrosion. The corrosion problem rests with one chemical produced by the urea process, ammonium carbamate . Ammonium carbamate is produced by reacting ammonia and carbon dioxide at high pressures (up to 200 bar ) in a special reactor. The urea reactor is a reactor vessel inside a protective shell. Should there be a leak in the reactor, the shell can contain the chemicals released long enough for an orderly plant shutdown. The space between the reactor skin and the shell is most often empty and employs various methods of detecting a leak ranging from conductivity measurements to infrared analysis . The actual reactor has been constructed using a variety of materials over the years that can resist ammonium carbamate corrosion. In the latest plants specialty duplex steels , such as Sandvik’s Safurex , have greatly improved the resistance to ammonium carbamate corrosion. Duplex steels have also been adopted for piping, valves, etc. Duplex steels though are not completely impervious to an attack by ammonium carbamate. There are two circumstances where a different material, zirconium , is needed. Zirconium is the best material for ammonium carbamate but is expensive, hard-to-work-with, etc., so using zirconium, as a standard material of construction is not feasible. There are two instances in urea plants though where zirconium is the prudent choice. SBN Urea Stripper ready for shipment © UreaKnowHow.com , used by permission One key problem area is the urea stripper. In this device, carbon dioxide is used to “strip” unreacted ammonia from the effluent of the reactor. One key measurement in operating the urea stripper is the level in the vessel. The level is measured by reading the differential pressure (DP) across the urea stripper. The high-pressure and corrosive fluid in the stripper doesn’t allow a direct connection to the differential pressure transmitter. Instead, we use diaphragm seals where a thin diaphragm isolates the transmitter from the process. “Thin” is the problem. Rosemount 1199 Zirconium diaphragm seal All metals have corrosion problems with ammonia carbamate. The thin pressure seal in the urea stripper level reading is a weak point. Reactor vessels, valves, etc. have enough material in contact with the ammonium carbamate to make some corrosion tolerable. Not so in the diaphragm seal. Should the seal leak, ammonia and ammonium carbamate would be released causing a major environmental and safety problem. The Rosemount 1199 Diaphragm Seal System has a high-pressure zirconium seal option especially designed for the urea market. Another specialty product for urea production is Fisher Severe Service valves , which have options for high-pressure, zirconium-lined valve applications for the urea reactor effluent. Why would you want to use a much more expensive zirconium valve when the industry-standard is a duplex steel valve? As I noted, “All metals have corrosion problems with ammonia carbamate” and the corrosion problems increase with temperature. A ten degree Celsius rise in temperature doubles the corrosion rate to the point where the duplex steel is no longer acceptable. The reason a urea plant might increase the temperature at the top of the urea reactor is financial. In strong urea markets, there is a large incentive to increase production. To increase production in a urea plant you must run the reactor hotter. This change causes a number of problems in a standard plant’s design, not the least of which is the possibility of a valve failure on the reactor effluent stream. The zirconium-lined valve solves this problem. As with the zirconium seal for the level reading on the stripper, the zirconium-lined valve is a specialty product developed for the urea market. You can connect with your local Fisher valve and Rosemount measurement specialists to discuss your specific application and process parameters. You can also learn more ways to increase efficiency by downloading the whitepaper, 4 Solutions for Urea Automation Challenges: Instrumentation and insights to increase efficiency . Related Posts Offshore Technology Conference 2016—Examine your Chemical Injection System Urea Production Automation Challenges Establishing Effective Corrosion Monitoring Level Measurement for High Process-Low Ambient Temperature Applications Improving Safe Operations with Wireless Vibrating Fork Level Switches DP Level Measurement with Electronic Remote Sensors Innovation Recognized The post Avoiding Corrosion while Increasing Urea Production appeared first on the Emerson Process Experts blog.
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Blog Post: Avoiding Corrosion while Increasing Urea Production
James Gremillion Author: James Gremillion One of the key problems urea plants face is corrosion. The corrosion problem rests with one chemical produced by the urea process, ammonium carbamate . Ammonium carbamate is produced by reacting ammonia and carbon dioxide at high pressures (up to 200 bar ) in a special reactor. The urea reactor is a reactor vessel inside a protective shell. Should there be a leak in the reactor, the shell can contain the chemicals released long enough for an orderly plant shutdown. The space between the reactor skin and the shell is most often empty and employs various methods of detecting a leak ranging from conductivity measurements to infrared analysis . The actual reactor has been constructed using a variety of materials over the years that can resist ammonium carbamate corrosion. In the latest plants specialty duplex steels , such as Sandvik’s Safurex , have greatly improved the resistance to ammonium carbamate corrosion. Duplex steels have also been adopted for piping, valves, etc. Duplex steels though are not completely impervious to an attack by ammonium carbamate. There are two circumstances where a different material, zirconium , is needed. Zirconium is the best material for ammonium carbamate but is expensive, hard-to-work-with, etc., so using zirconium, as a standard material of construction is not feasible. There are two instances in urea plants though where zirconium is the prudent choice. SBN Urea Stripper ready for shipment © UreaKnowHow.com , used by permission One key problem area is the urea stripper. In this device, carbon dioxide is used to “strip” unreacted ammonia from the effluent of the reactor. One key measurement in operating the urea stripper is the level in the vessel. The level is measured by reading the differential pressure (DP) across the urea stripper. The high-pressure and corrosive fluid in the stripper doesn’t allow a direct connection to the differential pressure transmitter. Instead, we use diaphragm seals where a thin diaphragm isolates the transmitter from the process. “Thin” is the problem. Rosemount 1199 Zirconium diaphragm seal All metals have corrosion problems with ammonia carbamate. The thin pressure seal in the urea stripper level reading is a weak point. Reactor vessels, valves, etc. have enough material in contact with the ammonium carbamate to make some corrosion tolerable. Not so in the diaphragm seal. Should the seal leak, ammonia and ammonium carbamate would be released causing a major environmental and safety problem. The Rosemount 1199 Diaphragm Seal System has a high-pressure zirconium seal option especially designed for the urea market. Another specialty product for urea production is Fisher Severe Service valves , which have options for high-pressure, zirconium-lined valve applications for the urea reactor effluent. Why would you want to use a much more expensive zirconium valve when the industry-standard is a duplex steel valve? As I noted, “All metals have corrosion problems with ammonia carbamate” and the corrosion problems increase with temperature. A ten degree Celsius rise in temperature doubles the corrosion rate to the point where the duplex steel is no longer acceptable. The reason a urea plant might increase the temperature at the top of the urea reactor is financial. In strong urea markets, there is a large incentive to increase production. To increase production in a urea plant you must run the reactor hotter. This change causes a number of problems in a standard plant’s design, not the least of which is the possibility of a valve failure on the reactor effluent stream. The zirconium-lined valve solves this problem. As with the zirconium seal for the level reading on the stripper, the zirconium-lined valve is a specialty product developed for the urea market. You can connect with your local Fisher valve and Rosemount measurement specialists to discuss your specific application and process parameters. You can also learn more ways to increase efficiency by downloading the whitepaper, 4 Solutions for Urea Automation Challenges: Instrumentation and insights to increase efficiency . Related Posts Offshore Technology Conference 2016—Examine your Chemical Injection System Urea Production Automation Challenges Establishing Effective Corrosion Monitoring Level Measurement for High Process-Low Ambient Temperature Applications Improving Safe Operations with Wireless Vibrating Fork Level Switches DP Level Measurement with Electronic Remote Sensors Innovation Recognized The post Avoiding Corrosion while Increasing Urea Production appeared first on the Emerson Process Experts blog.
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