When the sleeve is moved to the on position, fluid is allowed to pass through the valve. The flow of spent catalyst to the regenerator is regulated by a slide valve in the spent. Design and operational modifications to model iv fccus to. Before a valve can be selected, we have to decide what type of valve will be used. First, due to the development of highly active zeolite fcc catalyst, the reaction time has been. The regen regulates the flow of regenerated catalyst to the riser, maintains the pressure head in the standpipe and protects the regenerator from a flow reversal. Imi remosas double clapet isolation valve is a new patented design to guarantee a tight shutoff under the most extreme operating conditions, including temperature and pressure. The valve is much easier to control in the 1080% stroke range. The pneu book is intended to provide an informative and interesting reference file, for use when designing or modifying pneumatic systems, or when. Pck has established a threshold for the rxcat slide valve opening to maintain an acceptable minimum regenerator dense bed temperature to achieve minimal afterburning while maintaining good catalyst activity maintenance. Move a disc, or plug into or against an orifice for example, globe or needle type valve. Slide valve actuator systems for catalyst control in fcc refineries when reliability and dependability are primary factors, bafco slide valve actuators are the first choice of fcc refinery operators. Successful operation of the fcc unit is critical to the operation of the fcc unit is critical to the operating success of most refineries. In some units these are used continuously for controlling catalyst flow, while in others they are used only in startup, shutdown, or emergency situations.
Several recent developments in the fcc process have made the feed injection system increasingly important. Fcc slide valve industrial professionals cheresources. Zimmerman jenson fccu slide valves and crane fccu slide valves. Add this site to favorites if you need free pdf documents, ebooks,users guide, manuals,notices and sheets online. The slide valve or plug valve regulates the flow of catalyst between the regenerator and reactor.
How solenoid valves work basics actuator control valve working principle duration. It is widely used to convert the highboiling, highmolecular weight hydrocarbon fractions of petroleum crude oils into more valuable gasoline, olefinic gases, and other products. Chemical safety board csb released its final report into the february 18, 2015, explosion at the exxonmobil refinery in torrance, california. Case studies slide valves, diverter valve, vo valve. With a spherical disc or dome valve shape there are no tight cavities for materials to pack and jamup causing the seat to tear or the operation to cease. Installed in the fluidised catalytic cracker fcc power recovery unit, it allows the maintenance of the expander while avoiding the shutdown of the fcc. Most of our valve designs help set industry standards. Design and operational modifications to model iv fccus to improve dynamic performance. In some fcc designs, the regenerated catalyst hopper is external with fluffing aeration to control the. An fcc is used to convert low value gas oils to valuable products like naphtha and diesel and slurry oil. May 19, 2015 troubleshooting in fcc unit presented by raphael slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Due to the valve design, incorporating a small facetoface dimension and lower weight than most valve types, the butterfly valve is an economical choice for larger line sizes i.
Best practices to increase performance, reliability. Steam engine plans plans for everything, mostly free. Refractory selection guide for fluid catalytic cracking. This horizontal slide engine design is a traditional mill, locomotive, side wheeler steamer type engine. In this way, the refiner can adjust the delta coke up or down as required for maximum flexibility. Crawford, building the workingmans paradise the design of. Imi remosa plug valves are fabricated from plates and forged material. The hilde engine is another simple design using a bent wire crankshaft, slide valve, and mostly brass construction.
Of the spent and regenerated cat valves, the latter is even more super critical as typically one gets adequate pr drop in spent cat valve owing to reactor elevation and reactor cat level. The control valve handbook is both a textbook and a reference on the strongest link in the control loop. Depending on the choice of fcc design, the combustion in the regenerator of the coke on. It increases the hydrocarbon ratio by carbon rejection in a continuous process. The primary valves are the regen and spent slide valves. The standpipes height provides the driving force for transferring the catalyst from the regenerator to the reactor. Based on the authors years of field experience, this expanded, second edition covers the latest technologies to improve the profitability and reliability of the fcc units, and provides. Specifically designed for steam and feedwater applications, the psg provides bidirectional zeroleakage using the ram coating systems. The spent catalyst slide valve, specified as a safetycritical device for normal operation, could not perform its safetycritical function of preventing air and hydrocarbons from mixing while the fcc unit was in its safe park mode of operation. The butterfly valve complies with asme facetoface dimensions and pressure ratings.
This book provides a complete and indepth view of fcc process, design and operating principles, and the current fcc technologies available to the refining industry. Shortly remosa became a world leader in this niche. Various kinds of seal were installed in the slide top, to keep steam away from most of it. Slide sleeve valve, 1032 thread, venting beswicks miniature msv slide sleeve valve provides an efficient inline threeway valve.
Within the reactor standpipe is the spent catalyst slide valve. Slide valves are control valves and are identified by their location and function in the fluid catalytic cracking unit. Catalyst circulation in the fluid catalytic cracking unit can be controlled through a plug valve. For our case, well assume were using an equal percentage, globe valve.
I i design a good quality of valve so i got good order from user. This thoroughly updated edition of fluid catalytic cracking handbook provides practical information on the design, operation, troubleshooting, and optimization of fluid catalytic cracking fcc facilities. Slide valves are control valves and are identified by their location and function in the fluid catalytic. Fluid catalytic cracking fcc is the dominant conversion process in petroleum refineries and the major contributor to value added in the refining process. When given a signal from dcs, it opens or closes in strokes not smoothly. Slide valve, hot shell design spent regenerated recirculation catalyst cooled flue gas double disc temperature up to 650 c up to 850 c up to 850 c up to 850 c up to 850 c material handled fcc catalyst fcc catalyst fcc catalyst fcc catalyst flue gas, steam, catalyst fines size up to 150 up to 150 up to 150 up to 150 up to 150 body. Mogas severe service ball valves have proven successful. Slide a flat, cylindrical, or spherical surface across an orifice for example, gate and plug valves. Remosa becomes manufacturer of valves for the fcc fluid catalytic cracking and expander prt applications. It was not much used in the uk but, at one time, had great popularity in the united states. Fcc fluw gas slide valves posted in refining, hydrocarbons, oil, and gas. The function of a fluid catalytic cracking unit fccu is to crack feedstock such as crude residues and gas oil and produce distillates.
Valve design principles top ten features of p21 gemco valve. This book provides a complete and indepth view of fcc process, design and operating principles. In control applications, it is obviously important that slide. If a belt or cable runs around a fixed shaft, friction between the belt and the shaft can cause the efficiency to be low, and the cable can rapidly wear. Fluid catalytic cracking fcc is one of the most important conversion processes used in. Guichon valves valve manufacturer for petrochemicals fcc. Slide valves vs piston valves model railroader magazine. Imi remosa slide valves are designed for easy maintenance. The slide valve or plug valve also provides a positive seal against a flow reversal of the hydrocarbons into the regenerator or hot flue gas into the reactor. The knife gate and sliding gate valves help control gravity batch unloading when handling dry free flowing materials. For more than 90 years, guichon valves, an independent european company, led by a longterm oriented management team, is focused on design, manufacturing, assembling and testing of special and custommade valves, for petrochemical, chemical, fine chemical, pharmaceutical, and nuclear industries, with demanding requirements. Properly selected and maintained control valves increase efficiency.
If you continue browsing the site, you agree to the use of cookies on this website. In our fcc deep catalytic cracking unit spent catalyst. This book includes extensive and proven knowledge from leading experts in the process control field including contributions from the isa and the crane company. Special design valves for fluid catalytic cracking fcc. Hi, the fcc slide valve is not functioning properly in our unit. Whatever their application, these valves must operate reliably in the service for which they are intended. Houston services has over 30 years experience in slide valve repair. The internal stuffing box prevents catalyst bypass from the regenerator to the air inlet teesection. Fcc fluw gas slide valves refining, hydrocarbons, oil.
Fccuspecial valvesincrease the process performance and. The valve chart for this type of valve is shown below. Our range of manually operated membrane slide valves cover the three main types each in both round and square designs. While steam at, say 150 psi may have an open jet velocity in excess of 3,000 feet per second, this velocity is reduced by the friction and bending of the ports in an ordinary slide valve engine to a value accepted from empirical tables as that near 8,000 feet per minute. Give us the tools, and we will finish the job winston. These control systems range from analog type to plc based units. Valve suppliers often receive quote requests for a knife gate when what a company is really looking for is a slide gate for dry bulk material handling. Spent catalyst control slide valves regenerated catalyst control slide valves flue gas slide valves. If catalyst get lumps one can experience such phenomenon. The standard round port configuration is used for on off service and the optional diamond port configuration is used for throttling.
Excessive pressure drop downstream of the slide valve. Remosa starts to design its own control systems and actuators, in order to provide the. High temperature suitability guichon designs fcc valves for a service temperature up to 800c 1400f, and more on request. Fcc emergency interlock system application by lewis pettengill uop llc pic senior technical leader the fluid catalytic cracking process since the 1940s the fluid catalytic cracking fcc process has proven itself as one of the most important of refinery processes. Fccu slide valves pushing the boundaries of slide valve technology to eradicate failure even under the most extreme operating conditions. Valve design principles top ten features of p21 gemco. One of the latest additions to imi remosas product list is the double disc double displacement 4d slide valve, a completely symmetric valve in which each of the two discs is able to perform the dual displacement and close the port even if the other one is stuck in any position. At some point, long before the piston valve went into common use, the balanced slide valve was developed to solve the wear problem. Fcc slide valve posted in industrial professionals.
Control valves are an increasingly vital component of modern manufacturing around the world. The fabri valve figure f39 slide gate valve is designed for shut off and throttling in difficult abrasive andor high solids slurry service. Design flexibility cseries valve adapts to applications. In fcc or dcc, the differential pr across slide valves are very critical for plant safety. We decided to put a oil box from which the air passes. One of the latest additions to imi remosas product list is the double disc double displacement 4d slide valve, a completely symmetric valve in which each of the two discs is able to perform the dual displacement and close the port. The process generally requires heat to complete the reaction.
Parallel slide gate valve erv electronic relief valve technical data sizes. All fcc units are designed with slide valves on catalyst transfer lines. As often as the two terms are intermingled, a knife gate and a slide gate are not the same. The fccu expansion joints are typically ranging up to dn 1800, 27 metric tons in weight and up to,5 meters in length. Buy products related to slide valve products and see what customers say about slide valve products on free delivery possible on eligible purchases. There are four basic types of flow control elements employed in valve design. Since its establishment, the company has been producing madetoorder valves for different industrial fields. Fluid catalytic cracking technology and operations joseph w. For last couple of months, weve experienced hard catalyst deposits on fcc flue gas slide valves which prevents the valve from opening fully during shutdowns. In the last shut down, we checked the interior of the valve and could not find any mechanical problems.
Xrays, pmi, hydraulic tests, welding books, controls certificatesetc. On page 1019, to 1024 it describes the bilgram diagram. Find fcc slide valves related suppliers, manufacturers, products and specifications on globalspec a trusted source of fcc slide valves information. Ideal for dry bulk material handling, meyermade knife gates and slide gates are reliable and designed to isolate airlock feeders below from hoppers above. Reza sadeghbeigi, in fluid catalytic cracking handbook second edition, 2000. Future issues will cover areas ranging from circuit design and symbols, to vacuum theory and cylinder efficiency. The balanced slide valve was invented by the scottish engineer alexander allan. It give good idea to design a good product to customer. Fcc special valves best practices to increase performance. By cracking heavy vacuum and atmospheric gasoils into more. A pulle y reduces these effects with rolling contact between the cable and. Analysis, calculation techniques predict fcc erosion and. Refractories used in coal fired boilers are outlined. Audels power plant and engineers guide 1945 starting on page 989 is one of the best books for slide valve design.
Proven and reliable design with hundreds of installations worldwide. It gave some of the advantages of a piston valve to a slide valve by relieving the pressure on the back of the valve, thus reducing friction and wear. Apr 27, 2016 avoid using the lower 10% and upper 20% of the valve stroke. Jun 22, 2000 this thoroughly updated edition of fluid catalytic cracking handbook provides practical information on the design, operation, troubleshooting, and optimization of fluid catalytic cracking fcc facilities. All components that are subject to erosion and wear are easily replaceable. Exxonmobil torrance final report chemical safety board. Failures of the dcs will not interfere with the function of the uop fcc eis. The spent catalyst slide valve controls the catalyst level in the stripper. Fluid catalytic cracking fcc is one of the most important conversion processes used in petroleum refineries. Nb corporations slide unit fits quick into your design.
Several licensors utilize plug valves to control the catalyst flow in their units in lieu of slide valves. To monitor key unit operating variables, the uop fcc eis is designed to integrate with the distributed control system dcs, as well as other process and equipment interlock systems. The plc based units are primarily what is supplied on modern control systems, but blac inc. Remosa enters for the first time uop vendor list as fcc expander applications supplier. When the sleeve is moved to the off position, the outlet is exhausted to the atmosphere and fluid is prevented from. The fcc process is used for converting higher molecular weight hydrocarbons. Material jamming into the tracks of slide gate valves resulting in sealing surface abrasion with every cycle of the valve. Because tapcoenpro slide valves have been designed to outperform industry standards for safety, performance and reliability, they have become the valve ofchoice of those in the severe environment process industries.
Rotate a disc or ellipse about a shaft extending across the. All body mounting surfaces are cnc machined in order to allow a precise matching of the components during the assembly stage. This is cold wall type design, which has got both thermal. Fluid catalytic cracking fcc in petroleum refining springerlink. In this paper both design and operational modifications to model iv fccus are studied. The plans are in german but the instructions in english. The valvtechnologies parallel slide gate valve psg addresses the need for true inline valve reparability in large diameter, highenergy piping systems.
Tapcoenpros enhancement to the original plug valve design includes an internal stuffing box. Whats the difference between a knife gate and a slide gate. Fccu expansion joints designed and manufactured by belman are refractory lined and unlined expansion joints for fluid catalytic cracking. Remosa enters for the first time uop vendor list as fccexpander applications supplier.
All are available in a range of materials to suit the food, pharmaceutical and chemical processing industries plus other powder related industries. Remosa starts to design its own control systems and actuators, in order to provide the customers with a complete and. Fluid catalytic cracking, or fcc, is the last step in the evolution of cat cracking processes also introduced in 1942, just like tcc or thermafor cat cracking, during the second world war in an effort to make highoctane number gasoline. Fluid bed cracking fcc attained 1700 bpd capacity by. Many different designs of fluid catalytic crackers have been introduced. The elevation difference between the standpipe entrance and the slide valve is the source of this pressure buildup. Whats the difference between a knife gate and slide gate.
The blast caused serious property damage to the refinery and scattered catalyst dust up to a mile away from the facility into the nearby community. Sliding valves in fluid catalytic cracking units fcc in oil refinery plants are an example of. Special design valves for fluid catalytic cracking fcc processguichon valves, custom made valve,special valve, valve, industrial valves slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Slide valve, hot shell design spent regenerated recirculation catalyst cooled flue gas double disc temperature up to 650 c up to 850 c up to 850 c up to 850 c up to 850 c material handled fcc catalyst fcc catalyst fcc catalyst fcc catalyst flue gas, steam, catalyst fines size up to 150 up to 150 up to 150 up to 150 up to 150. Exxonmobil did not establish the safe operating limits for operating the fcc unit in safe parka.
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