RNC

Make Merit Day on 16-Jan-2016.

Welcome responsibilities as it will bring in more chances of being successful and prosperous in this New Year.

A nuclear reactor is a system that contains and controls sustained nuclear chain reactions. Reactors are used for generating electricity, moving aircraft carriers and submarines, producing medical isotopes for imaging and cancer treatment, and for conducting research.

Fuel, made up of heavy atoms that split when they absorb neutrons, is placed into the reactor vessel (basically a large tank) along with a small neutron source. The neutrons start a chain reaction where each atom that splits releases more neutrons that cause other atoms to split. Each time an atom splits, it releases large amounts of energy in the form of heat. The heat is carried out of the reactor by coolant, which is most commonly just plain water. The coolant heats up and goes off to a turbine to spin a generator or drive shaft. Nuclear reactors are just exotic heat sources.

Opening ceremony of R4 and R5

Check out 11 photos from our 3-0 win against PTTGC # 4,5,6 in the RNC Cup 2015.

Most chemical reactions are faster at higher temperatures and heat exchangers are frequently used to provide the heat necessary to increase the temperature of the reaction.
A common heat exchanger is the shell and tube type (Figures 12 and 13) where one part of the process flows through a tube and the other part around the shell.
A good example where heat exchange is important is in the manufacture of sulfur trioxide from sulfur dioxide in the Contact Process where the excess heat is used to warm incoming gases.
The heat from the reaction is transferred to incoming gases across the tube wall (Figure 12) and the rate of heat transfer is proportional to:
i) the temperature difference between the hot gases and the incoming gases and
ii) the total surface area of the tubes.
Thus the rate of heat transfer required will determine the size of the exchanger but when a chemical reaction also occurs in the exchanger (as in the case of tubular reactors ), it is important to take into account the residence time of the materials (whether they be gases or liquids) in the heat exchanger.

1. - "Pressure Relief Valve"- to protect a system (e.g. pump, pipe segment or tank)
from excessive pressure (in excess of the set point).

2. - "Back Pressure Regulator"- to provide a means of retaining desired system
pressure to points of use in upstream line(s).

3. - "Pressure By-Pass Valve"- to protect a pump from 'dead-heading' by enabling
the flow to by-pass an obstruction.

4. - "Back Pressure Valve"- to provide back pressure directly on the discharge
of a pump to enhance its performance.

5. - "Anti-Siphon Valve"- to prevent unwanted chemical
siphoning through a pump; when negative pressure at a lower elevation could
create a siphon and drain a tank. The valve is set to open at the desired pumping
pressure, but seals tightly when a vacuum occurs downstream.

BOILERS: Boilers and thermal liquid heaters generate heat for use in other operations. They differ in the fluid medium used to transfer this heat.
STEAM: Steam boilers heat water to produce steam, which is then used to generate energy or heat for other processes.
GENERAL INFORMATION: Boilers are used to generate steam that then provides heat or power. Water is converted to steam in the boiler. This steam travels through the heating apparatus which can be any piece of equipment that requires steam for operation. The cooled steam is then condensed into water and returns to the boiler to start the cycle again.
USAGE EXAMPLES: Most fire tube boilers are portable and are used in oil fields, saw mills, and at construction sites to generate heat or power. Water tube and cast iron boilers may be solid-fuel fired, or they may operate on standard liquid and gas fuels. The water tube boiler below operates on gas fuel and is part of a co generation plant where heat from the fuel is simultaneously converted into electrical and thermal energy.

Welcome to Website : www.renewcoils.com

HOME 10MarNewsHonorable RNC President Mr. Chumpol Veerabanjerd meet with ASME Auditor Mr. Danilo G. Gonzales, RPE Place : RNC Date: 13 Sep 2014...

High-pressure fluid dynamic experiments are difficult to instrument due to the wall thickness needed. Furthermore, the safety-related licensing procedures of a pressurised facility are time-consuming and expensive. In order to circumvent these constraints, a technique was found to accommodate test sections in a pressure vessel for experiments under pressure equilibrium.

Quality Without Compromise , We are RNC.

It may never happened again due to Global Warming..... Its our mutual responsibility to maximum save our environment

Christmas brings family and friends together. It helps us appreciate the love in our lives we often take for granted. May the true meaning of the holiday season fill your heart and home with many blessings

An integrated gasification combined cycle (IGCC) is a technology that uses a gasifier to turn coal and other carbon based fuels into gas—synthesis gas (syngas). It then removes impurities from the syngas before it is combusted. Some of these pollutants, such as sulfur, can be turned into re-usable byproducts. This results in lower emissions of sulfur dioxide, particulates, and mercury. With additional process equipment, the carbon in the syngas can be shifted to hydrogen via the water-gas shift reaction, resulting in nearly carbon free fuel. The resulting carbon dioxide from the shift reaction can be compressed and stored. Excess heat from the primary combustion and syngas fired generation is then passed to a steam cycle, similar to a combined cycle gas turbine. This results in improved efficiency compared to conventional pulverized coal

Long live the king.

Fast pyrolysis

Fast pyrolysis is a process in which organic materials are rapidly heated to 450 - 600 °C in the absence of air. Under these conditions, organic vapors, pyrolysis gases and charcoal are produced. The vapors are condensed to bio-oil. Typically, 60-75 wt.% of the feedstock is converted into oil.

Pyrolysis offers the possibility of de-coupling (time, place and scale), easy handling of the liquids and a more consistent quality compared to any solid biomass. With fast pyrolysis a clean liquid is produced as an intermediate suitable for a wide variety of applications.

The rotating cone reactor

Fast pyrolysis process is based on the rotating cone reactor developed by the University of Twente. Biomass particles at room temperature and hot sand particles are introduced near the bottom of the cone where the solids are mixed and transported upwards by the rotating action of the cone. In this type of reactor, rapid heating and a short gas phase residence time can be realized.

The initial work of the University of Twente has been the basis for BTG to further develop the pyrolysis reactor and the overall process. Since 1993 BTG has been involved in numerous projects on fast pyrolysis.

A process flow diagram of BTG’s fast pyrolysis process is given below.

Pressure Vessel Design.

General Assembly View of Fix Tube Sheet & Heat Exchanger.

Hydrodesulfurization (HDS) is a catalytic chemical process widely used to remove sulfur (S) from natural gas and from refined petroleum products such as gasoline or petrol, jet fuel, kerosene, diesel fuel, and fuel oils. The purpose of removing the sulfur is to reduce the sulfur dioxide (SO2) emissions that result from using those fuels in automotive vehicles, aircraft, railroad locomotives, ships, gas or oil burning power plants, residential and industrial furnaces, and other forms of fuel combustion.

Another important reason for removing sulfur from the naphtha streams within a petroleum refinery is that sulfur, even in extremely low concentrations, poisons the noble metal catalysts (platinum and rhenium) in the catalytic reforming units that are subsequently used to upgrade the octane rating of the naphtha streams.

The industrial hydrodesulfurization processes include facilities for the capture and removal of the resulting hydrogen sulfide (H2S) gas. In petroleum refineries, the hydrogen sulfide gas is then subsequently converted into byproduct elemental sulfur or sulfuric acid (H2SO4).
In an industrial hydrodesulfurization unit, such as in a refinery, the hydrodesulfurization reaction takes place in a fixed-bed reactor at elevated temperatures ranging from 300 to 400 °C and elevated pressures ranging from 30 to 130 atmospheres of absolute pressure, typically in the presence of a catalyst consisting of an alumina base impregnated with cobalt and molybdenum (usually called a CoMo catalyst). Occasionally, a combination of nickel and molybdenum (called NiMo) is used, in addition to the CoMo catalyst, for specific difficult-to-treat feed stocks, such as those containing a high level of chemically bound nitrogen.

The image below is a schematic depiction of the equipment and the process flow streams in a typical refinery HDS unit.

Schematic diagram of a typical Hydrodesulfurization (HDS) unit in a petroleum refinery
The liquid feed (at the bottom left in the diagram) is pumped up to the required elevated pressure and is joined by a stream of hydrogen-rich recycle gas. The resulting liquid-gas mixture is preheated by flowing through a heat exchanger. The preheated feed then flows through a fired heater where the feed mixture is totally vaporized and heated to the required elevated temperature before entering the reactor and flowing through a fixed-bed of catalyst where the hydrodesulfurization reaction takes place.

The hot reaction products are partially cooled by flowing through the heat exchanger where the reactor feed was preheated and then flows through a water-cooled heat exchanger before it flows through the pressure controller (PC) and undergoes a pressure reduction down to about 3 to 5 atmospheres. The resulting mixture of liquid and gas enters the gas separator vessel at about 35 °C and 3 to 5 atmospheres of absolute pressure.

Most of the hydrogen-rich gas from the gas separator vessel is recycle gas, which is routed through an amine contactor for removal of the reaction product H
2S that it contains. The H
2S-free hydrogen-rich gas is then recycled back for reuse in the reactor section. Any excess gas from the gas separator vessel joins the sour gas from the stripping of the reaction product liquid.

The liquid from the gas separator vessel is routed through a reboiled stripper distillation tower. The bottoms product from the stripper is the final desulfurized liquid product from hydrodesulfurization unit.

The overhead sour gas from the stripper contains hydrogen, methane, ethane, hydrogen sulfide, propane, and, perhaps, some butane and heavier components. That sour gas is sent to the refinery's central gas processing plant for removal of the hydrogen sulfide in the refinery's main amine gas treating unit and through a series of distillation towers for recovery of propane, butane and pentane or heavier components. The residual hydrogen, methane, ethane, and some propane is used as refinery fuel gas. The hydrogen sulfide removed and recovered by the amine gas treating unit is subsequently converted to elemental sulfur in a Claus process unit or to sulfuric acid in a wet sulfuric acid process or in the conventional Contact Process.

Note that the above description assumes that the HDS unit feed contains no olefins. If the feed does contain olefins (for example, the feed is a naphtha derived from a refinery fluid catalytic cracker (FCC) unit), then the overhead gas from the HDS stripper may also contain some ethene, propene, butenes and pentenes, or heavier components.

It should also be noted that the amine solution to and from the recycle gas contactor comes from and is returned to the refinery's main amine gas treating unit.

Large Hydroelectric Generator components.

Group photo of SCG completion job Aug 2013.

RNC group photo with President Mr Chumpol Veerabanjerd
Managing Director Mr Amnuay Wangnai and other officers with ASME auditor Mr. Danilo G. Gonzales, RPE

Some snaps during of ASME audit.

Honorable RNC President Mr Chumpol Veerabanjerd meet with ASME Auditor Mr. Danilo G. Gonzales, RPE

Preparation for ASME audit.....10-july-2014