Heat exchangers liquid coolers

Lean oil from the still is pumped through a heat exchanger and cooler and back to the absorber. Vapors from the still are cooled with partial condensation by indirect heat exchange with the rich oil. The condensate is passed to a separator, which removes water, and the liquid hydrocarbons are returned to the still as reflux. The partially cooled vapors are then passed to the benzol condenser where relatively complete condensation is obtained by the use of cooling water. In this particular plant, the condensate and noncondensed vapors are then passed through a vacuum pump to a separator. From this, noncondensed gases are returned to the fuel gas main, water condensate is removed for disposal, and the hydrocarbon layer is transferred to the crude-benzol storage tanks. 

Heat Exchanger - Shell and tube and double pipe exchangers, where the cooler side can be blocked in full of liquid while the hot side fluid flow continues, must be protected by either ... 

Figure 1-6. The MCR process for liquefying natural gas (1) coolers, (2) heat exchangers, (3,4) two stage compressors, (5) liquid-vapor phase separator.

Applications include reactor off-gas quenching, vacuum condensers, cooler-condensers, desuperheating and humidification. Water-cooling towers are a particular example of direct-contact heat exchange. In direct-contact cooler-condensers the condensed liquid is frequently used as the coolant, Figure 12.65. 

The liquid system from the production separator, consisting of a condensate/ water mixture, is first coded to ensure thot no gas breakout occurs during the subsequent stages and to reduce the level of dissolved water in the condensate. The Condensate Cooler is o shell and tube heat exchanger with inhibited fresh water on the shell side ond condensote on the tube side. 

From the reactor, the effluent flows through a separator (for the separation of inorganic salts precipitated during the process), a heat exchanger (with the influent), a heat recovery unit, an effluent cooler, and a letdown system to return the effluent to the ambient pressure. Then, a liquid/gas separator sep-... 

Subsequently the pure extraction gas flows through a heat exchanger where it is indirectly cooled with water to rise its density. When possible, it is intended to get a liquid phase which is collected in a connected buffer vessel (KP). The installed membrane compressor is able to pump gas as well as highly compressible liquids, which are withdrawn from the buffer vessel To achieve a maximum flexibility with respect to extraction medium and operation parameters a cooler (WT6, for gas phase recompression) or a heater (WT4, for liquid phase recompression) can alternatively be used to bring the recompressed solvent back to extraction temperature Before it is entering the main column a side stream is removed for the feed presaturation. 

Affect the electrochemical behaviour of the metal/liquid system. A galvanic cell may be established between areas on the same heat exchanger that are at different temperatures. The hotter regions may be anodic or cathodic to cooler areas. Problems may arise when the thermogalvanic cell gives rise to activity in one area and passivity in another, that may already exist or is in the process of being developed. 

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