SPECIAL EQUIPMENT AND VESSELS FOR HEATRECOVERY
28Pages

FLOWSERVE GESTRA Special Equipment and Vessels for Heat Recovery For every application the optimally coordinated system

Steam and condensate systems with one-stop sophistication Pressure-reducing and cooling system Flash steam/gas Cooling water SPECTORcontrol Production measurement Steam flow measurement Boiler automation as per TRD 604 Deaerating unit Measurement data from boiler house Condensate tank Flash vessel Intermittent boiler blowdown Heat exchanger Fresh/soft water Cooling water Cooling water Blowdown receiver

Special Equipment and Vessels for Heat Recovery Contents Preface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Quality – Made in Germany . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Energy Recovery Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Flash Vessel Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Mechanical temperature control Heat exchanger Feedwater Deaerating Plants . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Condensate Recovery and Return Systems...

Preface GESTRA is known all over the world as a manufacturer of high-quality steam traps, non-return valves and special equipment for the steam and condensate industry. In the field of boiler equipment, GESTRA is the largest supplier in Europe. GESTRA has achieved this leading position by focusing on quality and safety as well as on innovative, forward-looking solutions. Particularly in the German market, GESTRA has been offering complex solutions for steam and condensate systems for many years now – with great success. As a “one-stop shop”, we offer special equipment and vessels for heat...

Special Equipment and Vessels for Heat Recovery Quality – Made in Germany The QM system at GESTRA was already examined and approved in 1987, the year of publication for the ISO 9000 series, by Lloyd’s Register Quality Assurance according to ISO 9001. Diverse technical codes and standards apply in the various regional markets. For example, these may be the PED, IBR, SQL, ASME or GOST. In most cases, we are able to serve enquiries from these markets and to submit a comprehensive offer. The Pressure Equipment Directive PED 97/23/EC applies for the European Internal Market. PED 1 Conformity...

GESTRA Energy Recovery Systems After continuous blowdown, irrespective of whether automatically controlled or manually set, it is easily possible to utilize the dissipated heat. For example, in a GESTRA blowdown flash vessel, the energy generated by the continuous blowdown is recuperated to a large degree by flashing and can be used as buffer steam in the deaerator system. In a residual blowdown cooler located downstream, the heat remaining in the flash vessel can also be used to preheat the feedwater. Another possibility for heat recovery is offered by flash steam coolers. Flash steam...

Special Equipment and Vessels for Heat Recovery GESTRA Flash Vessel Systems Flash vessels reduce the operating costs considerably, because the sensible heat of the condensate is utilized very economically. They can be used in all steam systems in which condensate from steam users can be flashed to a lower pressure. During this process, heat is released, which leads to the formation of flash steam. In the flash vessel, this flash steam is separated from the water and fed into a steam system with a lower pressure for further use. Such a process can be repeated several times, depending on the...

GESTRA Feedwater Deaerating Plants For the operation of steam boilers with a high thermal load on the heating surfaces, it is necessary to use boiler feedwater is treated and conditioned according to TRD 611, EN 12952 part 12 or EN 12953 part 10. The boiler feedwater must be free of hardening constituents in order to prevent the formation of scale on the boiler heating surfaces. The aggressive effects of dissolved oxygen and carbon dioxide is likely to cause serious corrosion of metal boiler parts. Aggressive gases are reliably removed in the GESTRA feedwater deaerating plant. The feedwater...

Special Equipment and Vessels for Heat Recovery The make-up water and return condensate enter the deaerator dome NDR, which is fitted with a series of welded tray compartments to provide maximum trickling. Heating steam is fed from below into the deaerator dome NDR, which is mounted on top of the feedwater tank SW. The deaerated make-up water and return condensate flow directly from the deaerator dome into the feedwater tank. A steam injector installed in the lower part of the feedwater tank is used to heat up the feedwater to approx. 107 °C. Oxygen and carbon dioxide are dissolved in water...

GESTRA Condensate Recovery and Return Systems In steam and condensate systems, it is often inevitable that heat exchangers are installed at a lower level than the condensate main, so that the condensate has to be lifted. If the service pressure in the condensate system is high enough, the condensate line to the heat exchangers can also be installed so that it rises constantly, to prevent sudden changes in height. If there are jumps of more than 7 metres, we recommend the use of condensate dampening pots (type ED) to prevent waterhammer. These provide a cushioning effect to neutralize...

Special Equipment and Vessels for Heat Recovery GESTRA Steam-Operated Condensate Return Systems Vent line Condensate return units of the type FPS do not require electrically-driven pumps to push the condensate to the main condensate tank, because they are powered by booster steam. The FPS units are designed for condensate flowrates up to 4.3 t/h and a max. service pressure of 12 bar. They are fitted with the corresponding non-return valves and supplied completely mounted and interconnected with counter-flanges, bolts and gaskets. Booster steam Condensate inlet Condensate outlet...

GESTRA Open-Type Condensate Recovery and Return Systems Rectangular condensate tanks of the standard type SDR are designed for condensate flowrates up to 10 t/h and a max. service pressure of 0.1 bar. Condensate inlet The condensate tanks are equipped with two externally mounted condensate pumps, bimetal dial thermometer, water level indicator, GESTRA level control equipment and level electrodes for automatic pump operation, non-return valves, isolating valves, high-pressure centrifugal pumps and pressure gauge. They are supplied completely mounted and interconnected, together with the...