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So that it can maintain a vacuum on the condenser; and the U-drains, which drain back to the condenser, don't get sucked dry by the ejector set. The length of each leg of U-drain is specifically designed to maintain a certain vacuum at each position. The U-drains drain the condensate from the inter and after condensers and the gland seal condenser back to the main condenser. Water under a perfect vacuum will stand in a column 34 feet high (10.33 meters), which means a vacuum of 30 inches of Mercury (762 mm) would draw everything out of a column that is not at least that high.
It's to maintain the water seal on the U-drains to prevent air induction into the condenser.
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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separating the tube bundle from the reboiler section where the residual reboiled liquid (called the bottoms product) is withdrawn, so that the tube bundle is kept covered with liquid.Image 1: Typical steam-heated kettle reboiler for distillation towers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 Boiler feed pump?
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What is supercritical boiler?
The following extract taken from an article by Ingo Paul in Energy Issues No 19 April 1999 published by the World Bank [external link] briefly describes the difference between a subcritical and a supercritical boiler. "Supercritical" is a thermodynamic expression describing the state of a substance where there is no clear distinction between the liquid and the gaseous phase (i.e. they are a homogenous fluid). Water reaches this state at a pressure above 22.1 megapascals (MPa) The "efficiency" of the thermodynamic process of a coal fired power (sic) describes how much of the energy fed into the cycle is converted into electrical energy. The greater the output of electrical energy for a given amount of energy input, the higher the efficiency. If the energy input to the cycle is kept constant, the output can be increased by selecting elevated pressures and temperatures for the water-steam cycle. Up to an operating pressure of around 19 MPa in the evaporator part of the boiler, the cycle is sub-critical. This means, that there is a non-homogeneous mixture of water and steam in the evaporator part of the boiler. In this case a drum-type boiler is used because the steam needs to be separated from water in the drum of the boiler before it is superheated and led into the turbine. Above an operating pressure of 22.1 MPa in the evaporator part of the boiler, the cycle is supercritical. The cycle medium is a single phase fluid with homogeneous properties and there is no need to separate steam from water in a drum. Once-through boilers are therefore used in supercritical cycles. www.whizkris.com
Do aromatics disappear as fuel oil ages?
No the aromatic compounds will be still there as long as this is kept in an air tight container. Once the available air space is saturated with the compound in that air IT will not allow the release of more then that.
WHY DID THE IRON ROD KEPT IN COPPER SULPHATE SOLUTION TURNED BROWN AFTER SOMETIME?
The Iron rod(Fe) reacts with the Copper Sulphate. Substitution reaction takes place. Fe+CuSO4--> FeSO4 + Cu
Why the height of a vehicle kept as low as possible?
the height of vehicle is kept as low as possible because it can low the front part of racing car
What is the minimum height required for chimney of 100 KVA DG Set which is kept in?
What is the minimum height required for chimney of 100 KVA DG Set which is kept in
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the height of blast furnace is kept high to ensure the completion of reaction.
Can you steam a mink coat?
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Which innovation freed industrialists from dependence on waterpower which had kept their factories close to rivers?
steam engine
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if u mean height wise about 1000 feet
What did Orville Wright do when Wilbur was flying the plane?
He kept a record of the time, distance and height of the flight.
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To reduce the centre of gravity and improve stability of the vehicle.
Why the height of the vehicles is kept as low as possible?
To reduce the centre of gravity and improve stability of the vehicle.
Are amputees considered midgets because of their reduced height?
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What is controlled and uncontrolled extraction in double extraction steam turbine?
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