A delayed coker is a type of coker whose process consists of heating a residual oil feed to its thermal cracking temperature in a furnace with multiple parallel passes. INTRODUCTIONThe Delayed Coking Unit is described as a "Continuous / Batch" type of process. The major subforms of the coking process are (1) the delayed coking process and (2) the fluid coking process… MODELING OF A DELAYED COKER by JOHN E. ALBERS, B.S.Ch.E. Figure 2. This cracks the heavy, long chain hydrocarbon molecules of the residual oil into coker gas oil and petroleum coke. flow diagram Crude Oil Desalting A basic. It is one of the refinery Delayed Coker Unit. The internal compo-nents were in perfect condition. Delayed Coker Yield Prediction Estimation of product yields can be carried out using correlations based on the weight percent of Conradson carbon residue (wt% CCR) in the vacuum residue. existing delayed coker units. The objective of this presentation is to illustrate in concrete terms the different steps in a Pinch analysis of an industrial process in a retrofit situation. Elevated temperatures, dynamic loading and vibrations and impact damage can create problems, that if left unaddressed, can diminish the reliability and safety of the unit. The main objective of the delayed coking unit is to convert low value residual products to lighter products of higher value and to produce a coke product. EIL has experience in process design and engineering for both open art and licensed units. This relatively simple concept produces good flame patterns and low NOx emissions by optimally distributing (staging) the fuel into the air stream and against the wall. Delayed Coker Unit Coke Drums and Hydroblast Systems. The "on-line" drum is being filled, while the "off-line" drum being stream stripped, cooled, decoked, pressure checked, and warmed to be ready for the next "drum switch. 2.3.2 Coking. 17th April' 12 2 DELAYED COKER AT IOCL GUJARAT REFINERY 3.7 MMTPA (70,000 BPD) Licensor & Heater design: M/s Foster Wheeler World’s largest Coke Drums (4 nos., 32 ft) M/s Z & J fully Automatic Top and Bottom Heading/ Un-Heading device Ultra Low Pressure & Ultra Low Recycle operation Spray Chamber Design HCGO … Coking processes are processes in which the feedstock is thermally decomposed into lower boiling products. Therefore, brief descriptions of each of the processing steps preceding the delayed coking unit are provided as following. Experience In Motion. Operation of Delayed Coker at IOCL Gujarat Refinery 17th April’ 12. Materials of Construction for Refinery Units. HAZARDS OF DELAYED COKER UNIT (DCU) OPERATIONS August 2003 Bottom Unheading Deck - Section Removed For Coke Discharge 3 Way Valve --Isolating Open Drum and Winch Conveying Vapors To Fractionator Tower Rotating Drill Stem Cutting Head Hydroblast Water Supply Hose Rotation Motor Drill Stem Guide Stripping Steam Inlet Valve Quench Water Inlet Valve A 4-drum delayed coking unit in a petroleum refinery. A delayed coker is a type of coker whose process consists of heating the residual oil feed to its thermal cracking temperature in a multi parallel pass furnace. EIL has already licensed five grass roots Delayed Coker units and carried out one revamp. Delayed Coking Process Design, Operations and Optimization May 2012 Canada Coking Conference October 22-26, 2012 Fort McMurray, Alberta. The process flow through the coker furnace is continuous and the process stream is switched between a pair of coke drums. This program has been developed by Refining Process Services to provide an in-depth discussion of the process fundamentals and mechanical systems associated with the operation of a delayed coking unit. Continuously advancing safety, availability and profitability. Delayed coking is one of the unit processes used in many oil refineries. The delayed coker is integrated with the rest of the refinery. On the other hand, Engineers India Ltd. (EIL) has already licensed 5 grass root Delayed coker units and carried out one revamp. product properties for Delayed Coking process based on a state-of-the-art pilot plant and in-house developed process simulator/calculations. Delayed Coker Feed. Feed for the Delayed Coker Delayed Coker can process a wide variety of feedstocks Can have considerable metals (nickel & vanadium), sulfur, resins, & asphaltenes Most non‐volatile contaminants exit with coke Typical feed is vacuum resid Atmospheric residoccasionally used Specialty cokes may also use gas oils, FCC cycle oils, … Feed composition dependent on actual crude & crude blend. RFCC & BASE OIL UNIT CARBON BLACK & DELAYED COKER PETROCHEMICALS INTEGRATION AND OFFSHORE CRUDE PROCESSING Value maximization by bottom of the barrel up gradation by commissioning Base Oil Unit & RFCC and entry into specialized products like Group II and III Base Oil, Polymer Grade Propylene, Alkylate, etc. Once removed from the coke drums, the coke is transported away from the receiving area. The APC implementation is carried out in the delayed coker unit. DELAYED COKING A delayed coking is a type of coking whose process consists of heating a residual oil feed to its thermal cracking temperature in a furnace with multiple parallel passes. Delayed Coker Unit Cutaway to Depict Drum In Filling and Migration Mode (Left) and Drum In Cutting Mode (Right). refinery. Freestanding flat-flame burners are also typically used Velan delayed coker valves are currently installed in over 170 . LIST OF TABLES TABLE OF CONTENTS f\Kf b^^/ IV LIST OF FIGURES CHAPTER 1. PROPRIETARY INFORMATION Solids Contamination – description and source Organic - Coke fines generated in the delayed coker - Asphaltene precipitation and agglomeration Inorganic - Bitumen silt which is a result the oil recovery process … All these units have been performing as per their design quite successfully. The Delayed Coker Unit Animation describes the coking process in a step by step manner. Delayed coking process and a photograph of a delayed coking unit. Delayed coker feed originates from the crude oil supplied to the refinery. ). Delayed Coker - Free download as Powerpoint Presentation (.ppt / .pptx), PDF File (.pdf), Text File (.txt) or view presentation slides online. The valve was reinstalled using the original components. Delayed Coker Unit (DCU) November 2, 2013. 1940 1979 1981 2004 2011 1998 2003 1994 2010 2013 1938. The process configuration of a delayed coking unit resembles that of visbreaking (Figure 5.4), but the operation is more severe – slightly higher temperature and much longer residence time. It operated 10 years before it was taken out of service for evaluation. Coking is a refinery unit operation that upgrades material called bottoms from the atmospheric or vacuum distillation column into higher-value products and, as the name implies, produces petroleum coke—a coal-like material. James G. Speight PhD, DSc, in Oil and Gas Corrosion Prevention, 2014. About this page. Experience In Motion. IntroductionThe new Delayed Coker model in Aspen HYSYS Petroleum Refining rigorously models the delayed coker unit in a refinery, helping to optimize and debottleneck the process. The simplified data used to illustrate the procedure is based on an amalgamation of four different existing Delayed Coker Units. Delayed coking is one of the chemical engineering unit processes used in many petroleum refineries. In a Refinery the Delayed Coker Unit Process is a type of Coking Process where residual oil from vacuum distillation column is converted to low molecular weight hydrocarbon gases, naphtha, etc. INTRODUCTION 1 2. Delayed coking units and their production process create an environment that can lead to deterioration of various components. This cracks the long chain heavy carbon and hydrogen molecules of the residual oil into coker gas oil and pet coke. unit, a vacuum flasher unit, a delayed coker unit, hydrotreator units, hydro cracker units, a cat cracker unit, and a platformer unit. Parameters on Delayed Coker Petcoke Quality Robert (Bob) Clarke Process Manager, Refining Canada Coking Conference October 22 – 26, 2012 Fort McMurray, Alberta, Canada. A THESIS IN CHEMICAL ENGINEERING Submitted to the Graduate Faculty of Texas Tech University in Partial Fulfillment of the Requirements for the Degree of MASTER OF SCIENCE IN CHEMICAL ENGINEERING Approved May, 1996 . hexstar3 Delayed Coker Unit (3.7MMTPA) of Gujarat Refinery is having 4 Drum Operation with Two heaters (2 drums/heater) and three Charge Pumps was Commissioned in April 2011. hexstar3 Coker Charge Pumps, pumps the VR+RCO at 270 Deg C through coker heater as charge to the coke drums. Delayed Coking. This burner is well suited for applications with low heat release per burner, such as delayed coker heaters. The naphtha can be split in light naphtha (LN) and heavy naphtha (HN). In a delayed coking process the feed is heated in a furnace to cracking temperature, typically (485–505)°C, and it is then injected into a process vessel called the coking drum ( Figure 5.5 ). Source: Dr. Semih Eser As shown in Figure 6.6, the residue feed is introduced to the fractionator after being heated in the heat exchangers with the coker gas oil products. Challenges and Actions Taken This is the first project in which Shell Global Solutions US has used a contractor outside of Shell for its Advanced Process Control (APC) implementation. The old crude distillation unit has been upgraded to a production capacity of 80,000 bpd, following certain important improvements to its performance in order to bring it more in line with the specifications of the new distillation unit. Flowserve Pacific introduces the “combo” design — an axially shifted combination tool incorporating both boring and cutting nozzles within a single body. Download as PDF. (A reference list is available upon request) The first switch valve built to our design was installed in 1983. Beim Delayed Coking wird das Rückstandsöl zuerst in den Hauptfraktionator der Koker-Anlage geleitet, wo es u. a. als Waschmedium für den Produktstrom aus den Kokstürmen – den eigentlichen Reaktionsbehältern – dient (schwere Anteile aus dem aktiven Koksturm werden dadurch dem Prozess wieder zugeführt, recycelt). From here, the coke is either exported from the refinery or crushed, washed, and stored prior to export. process. for Delayed coking process based on state-of-the-art pilot plant and in-house developed process simulator/calculations. Figure 1; Typical Basic Process Flow Diagram of a Delayed Coker Unit (Schematic provided by Bechtel Hydrocarbon Technology Solutions, Inc.) The delayed coker is designed for the coker furnaces to heat the residue to cause cracking to occur in the coke drums at 875 - 940 ⁰F. in a delayed coker unit. Set alert. Exports of petroleum coke accounted for about 19% of the nation's finished petroleum product exports through October 2012 with most going to China and other Asian countries. The split in wt% is 33.22 and 66.78, respectively, respectively. This cracks the heavy, long chain hydrocarbon molecules of the residual oil into Coker gas oil and petroleum coke. To increase ADNOC’s international refined products market …