The document describes the key units and processes within the Naphtha Cracker Unit (NCU) of Haldia Petrochemicals Ltd. The NCU cracks naphtha to produce ethylene, propylene, and other hydrocarbons. It has several distillation columns that separate the hydrocarbon components, including demethanizer, deethanizer, depropanizer, debutanizer and associated fractionators. The goal is to produce purified ethylene, propylene and other products for downstream polymer production.
The petroleum industry, also known as the oil industry or the oil patch, includes the global processes of exploration, extraction, refining, transporting (often by oil tankers and pipelines), and marketing of petroleum products. The largest volume products of the industry are fuel oil and gasoline (petrol).
A case study on Process Condensate Stripper in Ammonia Plant by Prem Baboo.pdfPremBaboo4
A trouble shooting case study in Fertilizers unit, India.Solving the problem of Feed/Effluent Exchanger E-3321A/B in Process Condensate stripping section of Ammonia plant by Analytical approach. The problem solved by in house experts without changing the heat exchangers while others plant change the heat exchangers. Number of modification done and huge amount of energy saved. The paper intended how to save energy by changing heat exchanger and pressure of PC Stripper. The treated process condensate was earlier cooled by CW in final cooler from about 90ºC to 40ºC. This available heat of PC is being recovered by exchanging heat with DM water in a plate heat exchanger. The pressure of PC stripper has been raised to about 1.5 kg/cm²g to make the extra heat recovery possible. Now pressure is 41.5 kg/cm2. A new Plate heat exchanger was procured & installed for the heat recovery.
The petroleum industry, also known as the oil industry or the oil patch, includes the global processes of exploration, extraction, refining, transporting (often by oil tankers and pipelines), and marketing of petroleum products. The largest volume products of the industry are fuel oil and gasoline (petrol).
A case study on Process Condensate Stripper in Ammonia Plant by Prem Baboo.pdfPremBaboo4
A trouble shooting case study in Fertilizers unit, India.Solving the problem of Feed/Effluent Exchanger E-3321A/B in Process Condensate stripping section of Ammonia plant by Analytical approach. The problem solved by in house experts without changing the heat exchangers while others plant change the heat exchangers. Number of modification done and huge amount of energy saved. The paper intended how to save energy by changing heat exchanger and pressure of PC Stripper. The treated process condensate was earlier cooled by CW in final cooler from about 90ºC to 40ºC. This available heat of PC is being recovered by exchanging heat with DM water in a plate heat exchanger. The pressure of PC stripper has been raised to about 1.5 kg/cm²g to make the extra heat recovery possible. Now pressure is 41.5 kg/cm2. A new Plate heat exchanger was procured & installed for the heat recovery.
In the plant, ammonia is produced from synthesis gas containing hydrogen and nitrogen in the ratio of approximately 3:1. Besides these components, the synthesis gas contains inert gases such as argon and methane to a limited extent. The source of H2 is demineralized water and the hydrocarbons in the natural gas. The source of N2 is the atmospheric air. The source of CO2 is the hydrocarbons in the natural gas feed. Product ammonia and CO2 is sent to urea plant. The present article intended the description of ammonia plant for natural gas based plants and the possible material balance of some section.
In the plant, ammonia is produced from synthesis gas containing hydrogen and nitrogen in the
ratio of approximately 3:1. Besides these components, the synthesis gas contains inert gases such
as argon and methane to a limited extent. The source of H2 is demineralized water and the
hydrocarbons in the natural gas. The source of N2 is the atmospheric air. The source of CO2 is
the hydrocarbons in the natural gas feed. Product ammonia and CO2 is sent to urea plant. The
present article intended the description of ammonia plant for natural gas based plants and the
possible material balance of some section
In the plant, ammonia is produced from synthesis gas containing hydrogen and nitrogen in the ratio of approximately 3:1. Besides these components, the synthesis gas contains inert gases such as argon and methane to a limited extent. The source of H2 is demineralized water and the hydrocarbons in the natural gas. The source of N2 is the atmospheric air. The source of CO2 is the hydrocarbons in the natural gas feed. Product ammonia and CO2 is sent to urea plant. The present article intended the description of ammonia plant for natural gas based plants and the possible material balance of some section.
In the plant, ammonia is produced from synthesis gas containing hydrogen and nitrogen in the
ratio of approximately 3:1. Besides these components, the synthesis gas contains inert gases such
as argon and methane to a limited extent. The source of H2 is demineralized water and the
hydrocarbons in the natural gas. The source of N2 is the atmospheric air. The source of CO2 is
the hydrocarbons in the natural gas feed. Product ammonia and CO2 is sent to urea plant. The
present article intended the description of ammonia plant for natural gas based plants and the
possible material balance of some section
Overview of the fundamental roles in Hydropower generation and the components involved in wider Electrical Engineering.
This paper presents the design and construction of hydroelectric dams from the hydrologist’s survey of the valley before construction, all aspects and involved disciplines, fluid dynamics, structural engineering, generation and mains frequency regulation to the very transmission of power through the network in the United Kingdom.
Author: Robbie Edward Sayers
Collaborators and co editors: Charlie Sims and Connor Healey.
(C) 2024 Robbie E. Sayers
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Cosmetic shop management system project report.pdfKamal Acharya
Buying new cosmetic products is difficult. It can even be scary for those who have sensitive skin and are prone to skin trouble. The information needed to alleviate this problem is on the back of each product, but it's thought to interpret those ingredient lists unless you have a background in chemistry.
Instead of buying and hoping for the best, we can use data science to help us predict which products may be good fits for us. It includes various function programs to do the above mentioned tasks.
Data file handling has been effectively used in the program.
The automated cosmetic shop management system should deal with the automation of general workflow and administration process of the shop. The main processes of the system focus on customer's request where the system is able to search the most appropriate products and deliver it to the customers. It should help the employees to quickly identify the list of cosmetic product that have reached the minimum quantity and also keep a track of expired date for each cosmetic product. It should help the employees to find the rack number in which the product is placed.It is also Faster and more efficient way.
Explore the innovative world of trenchless pipe repair with our comprehensive guide, "The Benefits and Techniques of Trenchless Pipe Repair." This document delves into the modern methods of repairing underground pipes without the need for extensive excavation, highlighting the numerous advantages and the latest techniques used in the industry.
Learn about the cost savings, reduced environmental impact, and minimal disruption associated with trenchless technology. Discover detailed explanations of popular techniques such as pipe bursting, cured-in-place pipe (CIPP) lining, and directional drilling. Understand how these methods can be applied to various types of infrastructure, from residential plumbing to large-scale municipal systems.
Ideal for homeowners, contractors, engineers, and anyone interested in modern plumbing solutions, this guide provides valuable insights into why trenchless pipe repair is becoming the preferred choice for pipe rehabilitation. Stay informed about the latest advancements and best practices in the field.
CFD Simulation of By-pass Flow in a HRSG module by R&R Consult.pptxR&R Consult
CFD analysis is incredibly effective at solving mysteries and improving the performance of complex systems!
Here's a great example: At a large natural gas-fired power plant, where they use waste heat to generate steam and energy, they were puzzled that their boiler wasn't producing as much steam as expected.
R&R and Tetra Engineering Group Inc. were asked to solve the issue with reduced steam production.
An inspection had shown that a significant amount of hot flue gas was bypassing the boiler tubes, where the heat was supposed to be transferred.
R&R Consult conducted a CFD analysis, which revealed that 6.3% of the flue gas was bypassing the boiler tubes without transferring heat. The analysis also showed that the flue gas was instead being directed along the sides of the boiler and between the modules that were supposed to capture the heat. This was the cause of the reduced performance.
Based on our results, Tetra Engineering installed covering plates to reduce the bypass flow. This improved the boiler's performance and increased electricity production.
It is always satisfying when we can help solve complex challenges like this. Do your systems also need a check-up or optimization? Give us a call!
Work done in cooperation with James Malloy and David Moelling from Tetra Engineering.
More examples of our work https://www.r-r-consult.dk/en/cases-en/
Sachpazis:Terzaghi Bearing Capacity Estimation in simple terms with Calculati...Dr.Costas Sachpazis
Terzaghi's soil bearing capacity theory, developed by Karl Terzaghi, is a fundamental principle in geotechnical engineering used to determine the bearing capacity of shallow foundations. This theory provides a method to calculate the ultimate bearing capacity of soil, which is the maximum load per unit area that the soil can support without undergoing shear failure. The Calculation HTML Code included.
Final project report on grocery store management system..pdfKamal Acharya
In today’s fast-changing business environment, it’s extremely important to be able to respond to client needs in the most effective and timely manner. If your customers wish to see your business online and have instant access to your products or services.
Online Grocery Store is an e-commerce website, which retails various grocery products. This project allows viewing various products available enables registered users to purchase desired products instantly using Paytm, UPI payment processor (Instant Pay) and also can place order by using Cash on Delivery (Pay Later) option. This project provides an easy access to Administrators and Managers to view orders placed using Pay Later and Instant Pay options.
In order to develop an e-commerce website, a number of Technologies must be studied and understood. These include multi-tiered architecture, server and client-side scripting techniques, implementation technologies, programming language (such as PHP, HTML, CSS, JavaScript) and MySQL relational databases. This is a project with the objective to develop a basic website where a consumer is provided with a shopping cart website and also to know about the technologies used to develop such a website.
This document will discuss each of the underlying technologies to create and implement an e- commerce website.
Saudi Arabia stands as a titan in the global energy landscape, renowned for its abundant oil and gas resources. It's the largest exporter of petroleum and holds some of the world's most significant reserves. Let's delve into the top 10 oil and gas projects shaping Saudi Arabia's energy future in 2024.
Immunizing Image Classifiers Against Localized Adversary Attacksgerogepatton
This paper addresses the vulnerability of deep learning models, particularly convolutional neural networks
(CNN)s, to adversarial attacks and presents a proactive training technique designed to counter them. We
introduce a novel volumization algorithm, which transforms 2D images into 3D volumetric representations.
When combined with 3D convolution and deep curriculum learning optimization (CLO), itsignificantly improves
the immunity of models against localized universal attacks by up to 40%. We evaluate our proposed approach
using contemporary CNN architectures and the modified Canadian Institute for Advanced Research (CIFAR-10
and CIFAR-100) and ImageNet Large Scale Visual Recognition Challenge (ILSVRC12) datasets, showcasing
accuracy improvements over previous techniques. The results indicate that the combination of the volumetric
input and curriculum learning holds significant promise for mitigating adversarial attacks without necessitating
adversary training.
Industrial Training at Shahjalal Fertilizer Company Limited (SFCL)MdTanvirMahtab2
This presentation is about the working procedure of Shahjalal Fertilizer Company Limited (SFCL). A Govt. owned Company of Bangladesh Chemical Industries Corporation under Ministry of Industries.
2. Haldia Petrochemicals Ltd., often referred to as HPL is one of
the largest integrated green field petrochemical companies
and 2nd largest among petrochemical industries of India.
It is a naphtha based project which was set for the first time
in India. It is a polymer industry, producing Linear Low
Density Polyethylene (LLDPE), High Density Polyethylene
(HDPE) and Polypropylene(PP) as main products.
3. Naphtha is a flammable liquid hydrocarbon mixture.
The Naphtha that enters the plant from outside the Battery Limit is stored in tanks
before it is supplied to the Naphtha Cracker Unit (NCU).
There it is cracked so that the bigger hydrocarbons are broken down to smaller ones,
most importantly to Ethylene and Propylene, which are used to produce
polymers,namely, LLDPE, HDPE and PP, the three principal products of HPL.
In other words, the NCU acts as the most important unit in all of HPL as any carbon atom
in any molecule of product that has been produced from HPL has inevitably passed
through NCU.
4. NCU is a big unit with several operations
continuously going on inside it.
The operations can be broadly grouped into
three sections, namely:
● Heater section
● Compressor section
● Hot and cold section
5. The main objective of the hot and cold section is to separate
C1, C2, C3 and C4+ components and produce methane, ethylene
and propylene of required and achievable purity.
The hot and cold section has four main subsections that separate
the four hydrocarbon components. They are as follows:
● Demethanizer
● Deethanizer
● Depropanizer
● Debutanizer
6. The Demethanizer, the purpose is to separate out C1
components, mainly methane..
The Demethanizer column is a packed column having
9 beds that separates methane from the heavier bottom liquid.
The methane overhead splits into two parts. One stream
is mixed with reflux drum liquid and is sent to the cold box
as methane refrigerant.
The other part is heated, compressed by methane refrigerant
compressor to 39.65 kg/cm²g to liquefy it and then chilled by
overhead vapour and ethylene refrigerant to provide column
reflux and methane refrigerant to the chilling train.
The bottoms product, containing C2 and above, is pumped to
cold box off gas exchangers no. 3 which preheat the bottoms
before it is sent to the deethanizer.
7. the Deethanizer is the section that separates the C2 components from
the demethanizer bottoms and provides highly pure ethylene, arguably
the most important product of the naphtha cracker unit.
The Deethanizer column is a tray column having 69 trays that fractionates
the ethylene rich demethanizer bottoms into two streams. The tower is
pressurized to 21.38 kg/cm²g in order to prevent the boil up of C3’s.
Feed to the column is in two streams. Both streams have the same
composition but the lower feed is subjected to a higher degree of preheating.
Preheating and dividing the feeds minimizes the reflux requirements in the
rectifying section and reduces the liquid rates in the stripping section. The
bottoms from the C2 green oil knockout drum is sent on a flow control to
tray 4.
The deethanizer reboiler utilizes quench water to supply heat to the tower.
The backup steam heated deethanizer steam reboiler is used when there is
insufficient quench water available for reboiling purposes.
The overhead product, rich in C2’s is fed to the acetylene converters
and the liquid bottoms are pressured under flow control reset by level
control to the depropanizer no. 1
8. The deethanizer net overhead stream is hydrogenated
in the acetylene converters to convert acetylene to
ethylene and ethane upstream of the ethylene fractionator
This is a necessary step as acetylene would poison the
catalysts in the polymer units should it reach there with
the ethylene feed.
This hydrogenation step is done in two stages to improve
the selectivity of the reaction. All the reactions are in vapour
phase.
The acetylene converter is a reactor system with four beds
provided. Three beds of the reactor will be in service while
the fourth bed will be on standby or regenerating.
The reactor feed is heated to the reaction temperature
. It enters the first reactor and flows downward through
the catalyst bed, gets cooled and passes into the second
reactor. Intercooling is provided to remove the heat of
reaction.
9. The Ethylene fractionator is a fractionating column
having 162 trays, operating at 16.48 kg/cm²g pressure.
The purpose of this gigantic column is to separate
ethylene and ethane.
The main feed is hydrogenated C2’s from the ethylene dryer
that enters above tray 116, along with two recycle feeds,
entering at tray 126 and tray 134 respectively. Two reboilers
and one condenser are provided with the column.
A part of the overhead product is condensed using the
ethylene fractionator reflux drum and refluxed to the
column and the other part is fed as ethylene vent to
the demethanizer column.
The bottoms is ethane that is recycled to the cracking heaters
and the ethane wash column.
The main output from the ethylene fractionator column is
collected as side streams from different trays and forms the
desired product, ethylene that is sent to storage and the
polymer units that produce LLDPE and HDPE
10. The Depropanizer is the part whose purpose is to separate the C3’s from
charge gas that is the bottoms product of the deethanizer column and to
produce propylene, another extremely important product that is essential to the
polymer units.
There are two Depropanizer columns that serve the purpose of separating
the C3’s in series. The Depropanizer column no. 1and the Depropanizer
column no. 2 are tray columns having 48 trays and 26 trays respectively.
It has two reboilers and a reflux from the depropanizer no. 1 reflux drum .
The overhead product of this column passes through the depropanizer no. 1
flash drum where it is divided into two streams, one forming the reflux to
the column and the other forming the feed to the propylene dryers.
The bottoms product of this column still has a considerable amount of
C2’s entrained in it and it is distilled again in the depropanizer column no. 2
It has two reboilers and a condenser system having the depropanizer no. 2
reflux drum which divides the overhead product from the column into the
column reflux and a recycle feed to the depropanizer column no. 1 , which
exchanges heat with the main feed of this column on its way.
The bottoms product from the depropanizer column no. 2 containing C4+
is sent to the debutanizer column .
11. Similar to acetylene, the highly unsaturated
C3’s,namely the two isomers methyl acetylene
and propadiene (MAPD) would poison the
catalysts at the polymer plants if they are
allowed to reach those units mixed with the
propylene feed. Therefore, the dried gas from
the propylene dryer is fed to the MAPD
converters where MAPD is hydrogenated to
propylene and propane.
12. The Propylene fractionator is a fractionating
column that is divided into two separate
columns,50 having 75 trays and 153 trays
respectively, operating at 19.06 kg/cm²g and
17.98 kg/cm²g pressures respectively.
They can be imagined to be the stripping and
rectifying sections of a single distillation column.
The two sections are provided in two separate
towers as a singular propylene fractionator column
would be excessively high.
The purpose of these two columns is to separate
propylene and propane.
13. The Debutanizer is the final part of the hot and cold section, and it separates
C4 hydrocarbon products from the heavier components. The C4 components
can be used to produce certain useful products so they are separated in the
debutanizer and sent to the BL of the naphtha cracker unit.
The Debutanizer column is a tray column that has 53 trays and is
operated at 4.53 kg/cm²g pressure. It has two reboilers and a debutanizer
Reflux drum that serves the purpose of a condenser.
The feed is the bottoms product of the depropanizer column no. 2 and it
enters the column at tray 40. The overhead product from this column is
mixed C4’s that is divided into two streams in the debutanizer reflux drum
52
One stream is sent back to the column as reflux and the other is mixed
C4’s that is sent to the BL.
The bottoms product of this column is gasoline containing hydrocarbons,
C5 and higher. The bottoms product combines with heavy gasoline and
medium gasoline and forms the raw pyrolysis gasoline (RPG) product that
is sent to the BL.