Condensate pumps installation

Figure 7-15 Heavily damaged condensate pump installation. Courtesy of Eastman...

Figure 9.17 Condensate pump installation heavily damaged after operating with the suction and discharge valves tightly shut.

Number of main condensate pumps - the number of pumps per turbine designed to transport the main condensate from the condenser to a feedwater tank. For units that have separate booster condensate pumps installed, data providers should enter the following "number of main condensate pumps/number of booster pumps". 

The condensate return (returned, condensate or simply condensate) tank is positioned at the lowest point in a condensate return (CR) system and collects condensate from the various steam heating and process applications. If traps or condensate pumps are installed to aid the return of the condensate (as is usually the case), this is called a mechanical CR system. Nevertheless, some parts of the system may return condensate by gravity either to a condensate tank or directly to a FW tank. 

Air conditioner condensate lines are sometimes installed so that they penetrate the slab to dispose of the water in the subslab area. Even when water is trapped, this can be a problem because the traps often dry up during the heating season. At this point they become radon entry routes. It is recommended that air conditioning condensate lines run to a drain that will not dry out or that a condensate pump is installed that collects the condensate and disposes of it through a water trap. Often a washing machine drain is located in a basement near enough to use it. 

The next table, Table 8.30, is similar to the previous, but without any condenser. A steam condensate accumulator with condensate pumps is required however, many installations simply return the exhaust steam in an existing LP header directly, without any supplemental equipment other than piping added to the noncondensing turbine driver. Piping is... 

Successful application of the condensate pot technique above has been reported (155, 280). Sometimes, selfipriming condensate pumps without condensate pots (155) or pumping traps (20) are installed in the Fig. 17.1c arrangement. A cheaper alternative to both, but one which suffers the disadvantages described in items 1 to 3, 5, 6, 12, and 13 is using the condensate outlet scheme. 

Figure 21.5. Process of recovery of plasticizer from PVC full-scale installation. 1 reactor, 2 burner, 3 hot-gas line, 4 feed line, 5 discharge line, 6 discharge line, 7 condenser, 8 condenser outlet line, 9 condensate pump, 10 line, 11 line, 12 heat exchanger, 13 line, 14 offgas line, 15 branch line, 16 branch line, 17 circulating-gas line, 18 circulating-gas compressor, 19 branch line. [Adapted from Lyding Q Pille M, von Plessen H, Semel J, US Patent 5,464,876.]...

Two 50% capacity condensate pumps operate in parallel during normal operation. A third 50% capacity condensate pump is provided and maintained in standby for automatic starting if required. Each pump is electric -motor driven, vertical and installed at an elevation that allows operation at low condensate level in the main condenser hotwell. 

The expansion involves the installation of a new distillation column with a reboiler, condenser, pumps, and other associated equipment. A list of the equipment, sizes, materials of construction, and operating pressures is given in Table E7.14ral. Using the information in Appendix A, calculate the total module cost for this eiqiansion in 2006. 

Option Five—Install a condensate pump and condensate drum. Pump the condensate out under level control. The drum must be immediately next to and underneath the reboiler. Also, the drum must be high enough above the new condensate pump to provide sufficient net positive suction head (NPSH) for the pump. This is, of course, the preferred, if not the typical way of handling this very common design problem. 

In the dynamic slurry corrosion test loop [7], shown in Fig. 5-4, the pump discharge flow is directed through the bottom portion of the pressurizer to minimize settling and accumulation of slurry particles which would occur in this region if the pressurizer were connected as in the solution test loop. As shown in this figure, a condenser is installed in the... 

The thermocycle system can be operated only when condensing water is available at a temperature lower than the required chilled-water-supply temperature. Modifications for a centrifugal refrigeration unit include the installation of a small liqmd-refrigerant pump, cooler spray header nozzles, and a vapor bypass line between the cooler and the condenser. Without the compressor operating, a thermocycle capacity up to 35 percent of the refrigeration-unit rating can be produced. 

Manually Controlled System A manually controlled system comprises one or more transformer-rectifiers each with its associated control panels which supply the d.c. to the various anodes installed in the water box spaces. Each transformer-rectifier is provided with its own control panel where each anode is provided with a fuse, shunt and variable resistor. These enable the current to each anode to be adjusted as required. Reference cells should be provided in order to monitor the cathodic protection system. In the case of a major power station, one transformer-rectifier and associated control panel should be provided for separate protection of screens, circulating water pumps and for each main condenser and associated equipment. 

Since the end product is to be useful heat, there is an opportunity with heat pump compressors to use a drive motor which will contribute to this. The internal combustion engine is used for some drives, adding its radiator heat to the load, and at a higher temperature than the refrigerant condenser can provide. As the installation is static, and required to run for comparatively long times without attention, the ideal fuel is natural gas. Compressor and drive assemblies must be robust to withstand the extra vibration, and should be separate from the rest of the circuit. Engine combustion air intakes must be from outside the plantroom and possible refrigerant leaks. Steam drives have also been used. 

Installation arrangements, 351 Pump-down time, 380 Selection procedure, 374 Specification form, 377 Specifications, 373 Steam jet comparison, 356 Types of loads, 359 Ejectors, 346 Applications, 353 Barometric condenser, 249, 376 Booster, 370 Calculations Actual air capacity, 362 Air equivalent, 360... 

Figure 2.8.1 shows a typical installation for flasks and other containers in which the product is to be dried. The condenser temperature for this plant is offered either as -55 °C or as -85 °C. For this type of plant, a condenser temperature of -55 °C is sufficient as this temperature corresponds with a water vapor pressure of approx. 2.1 10 2 mbar, allowing a secondary drying down to approx. 3 10-2 mbar. This is acceptable for a laboratory plant, in which the limitations are not the condenser temperature but the variation of heat transfer to the various containers, the rubber tube connections and the end pressure of the vacuum pump (2 stage pump, approx. 2 10 2 mbar). Figure 2.8.2 shows that these units are designed for very different needs. The ice condenser in this plant can take up 7.5 kg of ice at a temperature down to -53 °C. 

Some pumps have easily exchangeable filter cartridges that not only hold back oil mist, but clean the circulating pump oil. Whenever the amount of water vapor present is greater than the water vapor tolerance of the pump, a condenser should always be installed between the vessel and the pump. (For further details, see Section 2.1.5)... 

Neutral species are best sampled using molecular beam methods in which the neutral beam is modulated between the sampling orifice and the ionization chamber of the mass spectrometer and only the modulated component of the mass spectrometer output is recorded. This approach enables all neutral species, including radicals to be detected with a comparable sensitivity. If modulation techniques are not used, the sensitivity for detecting condensible or reactive species is much less than for non-condensible, non-reactive neutral molecules because of the much larger effective pumping speed for the former in the mass spectrometer chamber. However, the ease of installation of non-line-of-sight non-modulated... 

---