Heat exchangers 2-4 type

Medium Pressure Synthesis. Pressures of 500—2000 kPa (5—20 atm) were typical for the medium pressure Fischer-Tropsch process. Cobalt catalysts similar to those used for the normal pressure synthesis were typically used at temperatures ranging from 170 to 200°C ia tubular "heat exchanger" type reactors. 

FIG. 11 -36 (Continued) Heat-exchanger-component nomenclature, (c) Outside-packed floating-head exchanger. Type AEP. (d) U-tuhe heat exchanger. Type CFU. (e) Kettle-type floating-head rehoder. Type AKT. (Standard of Tubular Exchanger Manufacturers Association, 6th ed., 1978. )... 

Heat transfer equipment has a great variation in heat transfer area per unit of material volume. Table 4.4 compares the surface compactness of a variety of heat exchanger types. Falling film evaporators and wiped film heat exchangers also reduce the inventory of material on the tube side. Process inventory can be minimized by using heat exchangers with the minimum volume of hazardous process fluid for the heat transfer area required. 

Heat exchanger type and number of tubes Choose TEMA R because of large size. 

Many boilers are fitted with a heat exchanger-type water sampling coil that permits the collection of a representative and cooled BW sample. The design generally provides for a coil of copper or stainless steel (SS) fitted inside a small SS shell. The unit is fitted with gate valves to control the flow of cooling water and BW. 

Heat-exchanger type PROX system with non-pellet catalyst... 

A small-scale PROX system was manufactured in a type of heat exchanger using non-pellet catalyst. Pt-Ru catalyst screened was impregnated on the support sheet. The support sheet was made by coating y-AlaOs on porous SUS-mesh plate (thickness 1.0 mm). The surface area of the catalyst sheet was 96 mVg. The catalyst sheet was applied to a heat exchanger type reactor of PROX as shown in Fig. 2. The PROX reactor was manufactured as a unit module and tested. Fig. 3 is the test-set of the PROX. Air was applied as the coolant. 

Figure 147. Heat exchanger type and unloading profile...

From the modular type it is not far to the heat exchanger type. Instead of using PCM modules there is a storage container with an internal heat exchanger (Figure 147). 

Figure 149. Heat exchanger type with pipes aas heaat exchanger (picture SGL TECHNOLOGIES)...

A rare type of storage is the direct contact storage (Figure 150). Direct contact storages have similar performance than heat exchanger type storages however... 

Three-layer membrane tube (in module configuration, 10 tubes per module, heat exchanger type). 

The reactor is of the heat-exchanger type with catalyst and tubes and rising steam outside. In this project we consider spherical catalyst particles of 5 mm diameter and a bed void fraction of 45%, which offers a good trade-off between efficiency and lower pressure drop. The gas inlet pressure is 10 bar. We aim at a pressure drop less than 15% of the operating pressure, namely a maximum of 1.5 bar. 

Heat exchanger Type Duty (MW) P (bar) Material Area (m2) FCCa (US )... 

It is the purpose of this chapter to discuss presently known methods for predicting the performance of nonisothermal continuous catalytic reactors, and to point out some of the problems that remain to be solved before a complete description of such reactors can be worked out. Most attention will be given to packed catalytic reactors of the heat-exchanger type, in which a major requirement is that enough heat be transferred to control the temperature within permissible limits. This choice is justified by the observation that adiabatic catalytic reactors can be treated almost as special cases of packed tubular reactors. There will be no discussion of reactors in which velocities are high enough to make kinetic energy important, or in which the flow pattern is determined critically by acceleration effects. 

The coiled heat exchanger is very compact, and it is frequendy used when space is limited. The decision between the heat-exchanger types is not as distinct as indicated. At the boundary of each category, a detailed analysis is required to arrive at the most economical choice. Walas [5] discusses other heat-exchanger designs. 

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