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Products
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General Accessory Equipment
There are many types of accessory or auxiliary equipment that could be required in the operational boiler room system (see Figure 1-14). Some of the equipment is to improve overall system efficiency, some to protect the boiler and system from corrosion, and some to reduce the problem of scale from building-up in the boiler. However, not every piece of equipment is required in every installation. Heat Recovery EquipmentHeat recovery equipment is available to preheat feedwater entering the boiler (economizer) and to capture Btu’s lost through boiler blowbown (blowdown heat recovery or flash tank heat exchangers). Such equipment is normally used on installations where boiler size, operating pressures or the amount of water make-up justify the economics for the purchase and installation costs (normally units exceeding 100 hp and operating at 100 psi or more). Maintenance costs also must be considered before a decision is made for their installation. Boiler Feedwater EquipmentBoiler feedwater usually contains two harmful dissolved gasses: Oxygen and Carbon Dioxide. If the dissolved gasses are not removed before entering the boiler, they will be liberated by heat and may cause severe corrosion in the boiler, steam lines, condensate lines, and heat transfer equipment, which can prove to be very costly. The dissolved oxygen and carbon dioxide can be removed with chemicals. Depending on the overall system, it may not be practical to chemically remove the dissolved oxygen and carbon dioxide from the feedwater. In these cases, a deaerator should be installed. Because the deaerator mechanically removes dissolves oxygen and carbon dioxide, the amount of chemicals required could be reduced. Pre-Treatment EquipmentFilters (see Figure 1-24) are available to remove free chlorine, some dissolved organics and sediment. They can also remove suspended solids, colloidal matter, sand and iron. There are carbon filters, multilayered filters, sand or iron filters. There can be lined tanks, ASME code tanks and automatic operation based on a time clock, pressure differential switch or water meter. They can protect such items as water softeners, dealkalizers, and reverse osmosis equipment, etc. Additional EquipmentBack to Boiler Descriptions Holman Boiler Works has five locations serving Texas and the Southwest: |
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