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What is the difference between a partial reboiler and a total reboiler?
A partial reboiler only partial vaporizes the bottoms liquid coming in. A total reboiler would completely vaporize this stream. A partial reboiler is advantageous because it allows dissolved light components to return to the column while minimizing the amount of heavy components that return to the column. This creates a higher purity of your desired product in the distillate stream.
What is kettle type reboiler?
Kettle Type Reboilers:Kettle reboilers are very simple and reliable. They may require pumping of the column bottoms liquid into the kettle, or there may be sufficient liquid head to deliver the liquid into the reboiler. In this reboiler type, steam flows through the tube bundle and exits as condensate. The liquid from the bottom of the tower, commonly called the bottoms, flows through the shell side. There is a retaining wall or overflow weir separating the tube bundle from the reboiler section where the residual reboiled liquid (called the bottoms product) is withdrawn, so that the tube bundle is kept covered with liquid.Image 1: Typical steam-heated kettle reboiler for distillation towers
What is the difference between boiler and reboiler?
In boiler the feed is only liquid but in reboiler the feed may be any liquid. second is that, reboiler do partial vapourization but the boiler does complete vapourization
Composition of the heating oil in reboiler?
We are usually use FO plus High speed Diesel in Reboiler.
What is the difference between a partial reboiler and a total reboiler?
A partial reboiler only partial vaporizes the bottoms liquid coming in. A total reboiler would completely vaporize this stream. A partial reboiler is advantageous because it allows dissolved light components to return to the column while minimizing the amount of heavy components that return to the column. This creates a higher purity of your desired product in the distillate stream.
What is kettle type reboiler?
Kettle Type Reboilers:Kettle reboilers are very simple and reliable. They may require pumping of the column bottoms liquid into the kettle, or there may be sufficient liquid head to deliver the liquid into the reboiler. In this reboiler type, steam flows through the tube bundle and exits as condensate. The liquid from the bottom of the tower, commonly called the bottoms, flows through the shell side. There is a retaining wall or overflow weir separating the tube bundle from the reboiler section where the residual reboiled liquid (called the bottoms product) is withdrawn, so that the tube bundle is kept covered with liquid.Image 1: Typical steam-heated kettle reboiler for distillation towers
What is Thermosyphon in transformers?
Thermosyphon is an on line transformer oil filtration system having some absorbents and mounted in the flow line of transformer oil out side the main tank of transformer. In many industrially advanced countries this system is frequently used for bigger transformer of ONAN (Oil Natural Air Natural) or ONAF (Oil Natural Air Forced) cooled. Although some Indian transformer manufacturers are aware about it however there are some grey areas like type and quantity of absorbent, design of thermosyphon fixture, maintenance schedule and doubt about dissolution of absorbent with oil, etc. Reduces cost incurred on frequent filtration of transformer oil. For example a power transformer having 20 K litre transformer oil the life of the transformer oil is 25 years; by mounting thermosyphon life increases by 5 more years without any significant additional cost.
Why you people introduce feed in distillation column from bottom?
It depends on what you are trying to distill. If your heavy constituents don't require as many steps to separate (sometimes a simple reboiler will do it) as your lighter constituents, you will feed closer to the bottom of the column.
Is the main reason for your amine to be loaded up with H2S Co2 the low temperature or is it that the percentage of amine is higher then normal 50 50?
To me both reason can incresed acid gas loading in lean amine. 1.When lean amine temperature is low then then amine absorb more quantity of H2S,CO2 which result high acid gas loading in lean amine. 2.When amine solution concentration is hiegher than 50/50 then slow absorption of CO2 but H2S absorption incresed which result high acis gas loading in lean amine. Note: Lean amne temperature is the main thing to increase acid gas loading. Jan Muhammad My take is that if your amine titration is higher than 50%, and are having trouble with loadings, then you are probably running out of regeneration (still/reboiler). It is critical to maintain a good overhead temperature and reboiler temperature so that the amine can be regenerated. Proper titration and lean amine temps tie back into this...
Can you have a hot and cold outdoor garden tap?
You should plumb both connections outside to where you want to use (control) them. The hot and cold cannot be plumbed together and then taken outside on one pipe, because the cold and hot will thermosyphon throughout the house's pipes, and when you turn the tap on and off you might get all hot water. Also, you cannot control for warmer or cooler, in that installation. Fixtures that pass through the wall with the washer and shutoff inside and the handle outside are standard from plumbing suppliers, and one for hot and one for cold is quite feasible. You must then mix them with some kind of "Y" connection outside.
What is function of tray?
The basic reason for having a chimney tray is to segregate two (2) different Unit Operations within the same piece of equipment - usually a pressure vessel. This technique is used in a variety of processes. For example, let's consider a TEG absorber (contactor). The basic process requirements for a TEG absorber call for the incoming feed gas to be totally devoid of any liquids - particularly water and/or hydrocarbons. In order to comply with this important specification, special, efficient vapor-liquid separators are installed upstream of the contactor. However, in certain situations - such as in offshore platforms - space and volume come at a premium and as a consequence, process engineers make use of a chimney tray to combine a vapor-liquid separator in the bottom section of the contactor tower and the actual, absorber section on the remaining top section of the same tower. By introducing a chimney tray between both section, the process engineer ensures that there will be vapor-liquid separation (one Unit Operation) in the bottom section and only the product moist gas stream will be injected into the bottom of the absorber section (another Unit Operation). Another example can be found in strippers or distillation columns. Sometimes there are needs in either of these two types of Unit Operations to introduce side-stream drawoffs or to selectively take a liquid portion and impose another Unit Operation on it (such as heating or reboiling). Taking a drawoff and diverting it to a reboiler while returning the reboiler vapor product back into the top section of the drawoff is done in many distillation towers and strippers. This is done by incorporating a chimney tray and gives the operation a more realistic credit of having one additional theoretical separation tray because the chimney tray segregates the feed liquid and the product vapors to-and-from the reboiler. The chimney tray does this without any moving parts.
What is function of chimney tray?
The basic reason for having a chimney tray is to segregate two (2) different Unit Operations within the same piece of equipment - usually a pressure vessel. This technique is used in a variety of processes. For example, let's consider a TEG absorber (contactor). The basic process requirements for a TEG absorber call for the incoming feed gas to be totally devoid of any liquids - particularly water and/or hydrocarbons. In order to comply with this important specification, special, efficient vapor-liquid separators are installed upstream of the contactor. However, in certain situations - such as in offshore platforms - space and volume come at a premium and as a consequence, process engineers make use of a chimney tray to combine a vapor-liquid separator in the bottom section of the contactor tower and the actual, absorber section on the remaining top section of the same tower. By introducing a chimney tray between both section, the process engineer ensures that there will be vapor-liquid separation (one Unit Operation) in the bottom section and only the product moist gas stream will be injected into the bottom of the absorber section (another Unit Operation). Another example can be found in strippers or distillation columns. Sometimes there are needs in either of these two types of Unit Operations to introduce side-stream drawoffs or to selectively take a liquid portion and impose another Unit Operation on it (such as heating or reboiling). Taking a drawoff and diverting it to a reboiler while returning the reboiler vapor product back into the top section of the drawoff is done in many distillation towers and strippers. This is done by incorporating a chimney tray and gives the operation a more realistic credit of having one additional theoretical separation tray because the chimney tray segregates the feed liquid and the product vapors to-and-from the reboiler. The chimney tray does this without any moving parts.
What is thermosyphen vessel?
Thermosiphon(alt. thermosyphon) refers to a method of passive heat exchange based on natural convection, which circulates liquid without the necessity of a mechanical pump. This circulation can either be open-loop, as when liquid in a holding tank is passed in one direction via a heated transfer tube mounted at the bottom of the tank to a distribution point - even one mounted above the originating tank - or it can be a vertical closed-loop circuit with return to the original vessel. Its intended purpose is to simplify the pumping of liquid and/or heat transfer, by avoiding the cost and complexity of a conventional liquid pump.Courtesy: Wikipedia.You can see this assembly mounted on chemical agitated reactors, they provide cooling to agitators.Basically principle is density difference... cold fluid has more density than cold one.. this is reason for motion of fluid. eg. solar heaters
What is a fraction tower?
A fractioning tower, (also known as a fractioning column) is a tower, where crude oil, found underneath the sea bed is placed into the tower. The tower then heats up the oil, which causes it to evaporate, and then begins to move up the tower. As the evaporated oil moves up the tower, some of the hydrocarbons in the oil begin to condense at different temperatures. These hydrocarbons are then used by consumers.
