Sulzer Select allows customers to make quick, accurate pump selections and to produce PDF output of the performance curve and data. Modelling heat exchanger and other networks enables the use of dynamic fouling models in performance assessment and predictive studies. Welcome to the Sulzer internetbased pump selection software tool ABSEL. ABSEL is an internetbased software tool that allows users to select pumps for the. Improving Condenser O M Practices. Losses attributed to condenser tube leaks, fouling, and failures continue to climb, costing the power generation industry an estimated half billion dollars annually in maintenance costs and loss of production. Spyro The Dragon Ps2 Iso S. Investing in an effective condenser maintenance program will reduce those expenses in short order. Maintaining clean condenser tubes is of vital importance to reliable, efficient power plant operation. PUMP INDUSTRY. Presidents welcome. W. elcome to a new year, a new issue of pump industry and a new PIA Council from a new President. At the November 2012 Annual. Compressed Air Gas Institute 1300 Sumner Avenue Cleveland, OH 44115. Phone 2162417333 Fax 2162410105 Email cagicagi. CAGI. IECEx Certified Service Facility IECEx Personnel Competency Schemes. John S Allen, Sulzer Dowding Mills. Condenser tubes may become lightly fouled with soft organic deposits or severely scaled with hardened minerals that are difficult to remove. Success in cleaning the condenser requires selecting the appropriate cleaning technology for the specific fouling conditions. Early identification of fouling characteristics and a fundamental knowledge of cleaning system capabilities are essential to determining the most effective cleaning technology, as well as the frequency of cleaning required. A good engineered coating can also prevent fouling of condenser tubes and renew life in older systems. Mechanisms of Condenser Tube Fouling. Generally, two major problems result from substances that adhere to interior tube surfaces loss of heat transfer and under deposit corrosion. Internal tube fouling is nearly always detrimental to heat transfer because it reduces the efficiency of condensing steam and results in less efficient steam turbine operation, as discussed in detail in the previous article, Optimizing Condenser Tube Selection. Internal tube fouling is also the most common cause of under deposit corrosionrelated tube failure. This form of corrosion can be caused either directly or indirectly. When the attack is direct, the deposit itself contains corrosive substances which, when concentrated at a localized site, can cause loss of tube material. A common example of this type of corrosion would be chloride pitting. Indirect attacks can be caused by several factors, including accumulation of deposits that form a barrier between the cooling water and tube material, allowing a corrosion cell to form underneath, or by microbiologically influenced corrosion MIC. Pitting is often a result, which can cause tube failure well before the materials life expectancy. Xspeed 7.0 there. In either situation, contaminants in cooling water which may be concentrated significantly in a recirculating cooling tower are the precursors to what often results in major damage to boiler tubing and steam turbine materials, potentially resulting in huge economic penalties in unit outages and equipment repair andor replacement. Investment in the equipment that can remove andor prevent foulants from forming on condenser tubes is a minor price to pay to produce the best possible plant economics. Options for Preventing and Removing Foulants. Equipment options for preventing andor removing foulants can be classified according to plant operating status off line or online. Off line removal methods include chemical acid or chelate dissolution and mechanical methods metal or plastic tube cleaners, brushes, high pressure water, and the like. Online preventive measures include chemical treatments scale and corrosion inhibition, dispersants, and biocides and continuous recirculation of sponge balls to remove soft deposits on the inner wall of the condenser tubes. Because condenser fouling can have such a dramatic impact on cost effective power plant operation, deposition and corrosion should be carefully monitored and the appropriate cleaning technology used at optimal intervals. Here is an overview of the main treatment options. Chemical Treatment Methods. Several chemicals, often in combination, are used to control condenser tube fouling. Chemicals are primarily utilized with recirculating cooling towers, because the concentration of dissolved constituents is significant, increasing the threat of scaling and corrosion, and because once through cooling systems often discharge directly into a river or lake, so chemicals are restricted in the effluent. Typical chemical treatment methods used today include adding scale inhibitors, dispersants, biocides, corrosion inhibitors, and chemicals for p. ISSUE 19. AUTUMN 2017. Lessons learned from a major pump station upgrade. Is your diesel pump costing you money Tips for irrigators More drive, less. H control. Another common way of mitigating chemically influenced problems is to minimize the concentration of dissolved solids in the system, particularly in cooling towers. A balance must be achieved between minimizing water use and avoiding excessive buildup of scaling and corrosive constituents in recirculated water. Some scales can be removed online by lowering circulating water p. H to the point of scale dissolution by increasing the sulfuric acid feed p. H of 5. 8 or less for calcium carbonate and 4. However, potential risks to base metal and carbon steel piping must be carefully considered when using such harsh chemicals. Pixel Interpolation Program. In the case of online chemical cleaning by p. IMG_1159-640x480.jpg' alt='Sulzer Pump Selection Tool' title='Sulzer Pump Selection Tool' />H reduction, one major disadvantage is that you cant be sure of the composition of the foulants. Chemical scale removal can be very effective and may be necessary if the deposits are silica based. However, chemical cleaning of condensers is maintenance and labor intensive. Mechanical Fouling Prevention. A number of mechanical approaches have been developed to prevent condenser tube fouling. Screens can be installed to block large debris from reaching the condenser while settling ponds andor clarifiers remove particulate and some dissolved constituents. Filtration systems, such as sand filters, can also be employed to remove fine particulates, on either a full flow or a side stream partial flow basis. A number of online systems have been developed that send cleaning objectssuch as sponge balls, brushes, or plastic scrapersthrough tubes with the cooling water flow. In theory, these devices will mechanically wipe the tube surface clean. In the more automated systems, the cleaning devices are retrieved at the condenser outlet and automatically returned to the inlet. Other designs return the devices to the inlet via backwashing. Because of the random distribution of some of the cleaning devices, not all tubes receive consistent cleaning. Increasing cooling water flow through the condenser can be effective in limiting microbiological growth. This approach will also keep cooling water temperatures lower, possibly to a point at which scale is less likely to form. However, higher flow rates can cause increased rates of erosion corrosion in copper alloys. Mechanical Removal Methods. Plant operating economics favor removing any deposits before they cause major loss of heat transfer, tube corrosion, or, ultimately, tube failure. Not only are there losses in performance to consider, but major equipment repairs often follow tube failures due to cooling water contaminants in the boiler or turbine. In general, mechanical cleaning is usually more cost effective than chemical cleaning. Mechanical cleaning techniques include high pressure water washing and shooting tube cleaners Figure 1 through the tubes. When balancing the need for clean condenser tubes against the time required for cleaning, mechanical tube cleaners are an excellent choice. High pressure water washing can be very time consuming, but using tube cleaner brushes for removing soft deposits or metal tube cleaners for more difficult deposits can be a quicker solution. Mechanical tube cleaner. Source Conco Systems Inc. Off line mechanical tube cleaners have been a reliable and effective technology since their introduction by Conco Systems Inc.