Vaporization heat exchanger

Mercury vapor Heat exchanger DOWTHERM Forced circn. Steel 220-350 Product... 

As with the other reactor configurations, vaporizers, heat exchangers, and a heat source are also needed for microreactors.Unless the hydrogen is 99.999% pure, the PEM fuel cell typically will utilize 70—80% of the diluted hydrogen fed to it. The unreacted hydrogen from the fuel cell anode, augmented with additional fuel as needed, can be used as fuel for the combustor. The use of anode off-gas requires special controls for transient operating conditions for example, a mechanism is needed to... 

Ammonia vaporizer heat-exchange area = 83m2. 

The deasphalted oil mix from the bottom of this tower flows to the pressure vapor heat exchanger where additional solvent is vaporized from the deasphalted oil mix by condensing high pressure flash. The high pressure solvent, totally condensed, flows to the high pressure solvent receiver. Partially vaporized, the... 

Vaporizer Heat exchanger with the primary function of vaporizing a liquid by transferring heat from a hot stream. Also termed reboiler in some applications. 

The Na vapor, traveling at vapor velocities of roughly 8-10 m/s at 1200 K, condenses on the heat exchanger tubes in the dome (the condensing vapor heat exchanger, CVHX) and returns as liquid droplets to the pool, thus completing the cycle. In the dome, the CVHX transfers the thermal energy out of the module to various chemical processors located some distance from the reactor. 

Step 3. The chlorine vapor leaving the vaporizer passes through an adiabatic expansion valve, then through a chlorine vapor heat exchanger. In the exchanger, the vapor comes in thermal contact with a hot flue gas from a furnace to be described in Step 15. The heat transferred from the flue gas is used to raise the temperature of the chlorine vapor to 25°C. The healed vapor is the chlorine feed to the absorber mentioned in Step 1. 

Step 16. The combustion products leave the furnace at 250 C and flow through the chlorine vapor heat exchanger (this stream is the flue gas referred to in Step 3) and then to a flare, where any carbon monoxide and residual hydrocarbons in the gas are burned and the products released to the atmosphere. The flare is a safety precaution if the furnace operates as intended, the CO and hydrocarbon content of the flue gas should be negligible. 

Since no highly corrosive catalysts are used in the process, the materials of construction need not be special grades of highly corrosion-resistant materials. The vaporizer, heat exchanger, separator, preheater, heater, and catalyzer may be made of steel condensers, mist remover, and still are often of stainless steel. 

The reactor effluent might require cooling by direct heat transfer because the reaction needs to be stopped quickly, or a conventional exchanger would foul, or the reactor products are too hot or corrosive to pass to a conventional heat exchanger. The reactor product is mixed with a liquid that can be recycled, cooled product, or an inert material such as water. The liquid vaporizes partially or totally and cools the reactor effluent. Here, the reactor Teed is a cold stream, and the vapor and any liquid from the quench are hot streams. 

Fig. 6. In a binary electricity generation plant, the hydrothermal water from the weU, A, is passed through a heat exchanger, B, where its thermal energy is transferred to a second, more volatile working fluid. The second fluid is vaporized and deflvered to a turbine, D. After exiting the turbine the spent working fluid is cooled and recondensed in another heat exchanger, E, using water or air as the coolant, F. It is then fed back to the primary heat exchanger to repeat the cycle. Waste hydrothermal fluid, C, can be reinjected into the producing field.

The rich oil from the absorber is expanded through a hydrauHc turbiae for power recovery. The fluid from the turbiae is flashed ia the rich-oil flash tank to 2.1 MPa (300 psi) and —32°C. The flash vapor is compressed until it equals the inlet pressure before it is recycled to the inlet. The oil phase from the flash passes through another heat exchanger and to the rich-oil deethanizer. The ethane-rich overhead gas produced from the deethanizer is compressed and used for produciag petrochemicals or is added to the residue-gas stream. 

The commercial production equipment consists of a furnace, heat-exchanger tubes, a fractionating column packed with Rachig rings, a KCl feed, a waste removal system, and a vapor condensing system (Fig. 1). 

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