Cleaning technology for fin tube heat exchangers
■ Summary of finned tubes cleaning
Key Benefits Ø Increased cooling performance and process efficiency Ø Increase production volume and increase production yield Ø Extend the process life of the device Ø Energy savings due to reduced fan power (in variable speed and pitch control motors) Ø Reduced temperature profile of column O/H and easy temperature control Ø Reduce maintenance costs
The cleaning process is safe and environmentally friendly (runs ON-Line or OFF-Line)
Why You Need to Keep Your AFC Clean
■Cleaning procedure Preparation work • Check the specifications and condition of the fin tube and calculate the amount of detergent to be used. In the case of on-line cleaning, the cleaning procedure is planned by considering the operating conditions. (Turn off some of the fans and perform partial cleaning in stages.) • The cleaning work team obtains permits for the process safety work instructions and cleaning procedures, and prepares cleaning equipment and cleaning agents. • Prepare cleaning agents and utilities (water, power) for cleaning, and install barricades around the device and in the work area. Install scaffolds if necessary. • A water pool is installed at the bottom of the fin tube bundle to apply the circulating cleaning method of the detergent. • Wear safety glasses, mask, and protective clothing when performing cleaning work. • Before starting the cleaning process, turn off the fan motor and turn off the power breaker. Lock the local switch and attach an Off Tag. Cleaning work 1. Spray the detergent diluted in water through the nozzle at low pressure across the entire surface of the upper part of the fin tube bundle, allowing it to flow downwards, sufficiently wetting the fin tubes and dissolving impurities in the water pool below. Let it flow down. 2. When the upper cleaning agent spray is completed, the lower fine tube containing remaining impurities is spray cleaned with a circulating cleaning agent. At this time, the spray nozzle The pressure should be applied in a wide spray at low pressure to avoid damaging the fin. The cleaning status is checked visually in real time. 3. Rinsing When the cleaning operation of the fin tubes is completed, low-pressure water is sprayed to remove any remaining Removes detergents and contaminants, Washing liquids and water are treated according to regulations. Generally, they are environmentally friendly . The composed detergent does not present any difficulties in wastewater treatment, and is discharged into the Sewer (OWS) and sent to the wastewater treatment process for treatment. ■ Analysis and evaluation of cleaning results and temperature trends by Ecos-R1 |
Cleaning of the fin tube should be free from damage by physical and chemical methods, and it is desirable to use a technique that works on the entire tube to dissolve and remove contaminants. The fin tube cleaning should be free from damage by physical and chemical methods, and it is preferable to dissolve and remove the deposits by acting on all the tube rows of the bundle ■ Summary of finned tubes cleaning
As a result, reducing process outlet temperature, increasing production rate and in case of variable speed motors reducing operating energy consumption (fan power).
Major Benefits Ø Improved cooling performance and unit efficiency Increase of throughput / production (Increase product yield) Ø Prolonged unit life Ø Energy saving by reduced fan power (in a variable speed & pitch control motors) Ø Reduce temperature profile of the column O/H and easy to control Ø Reduced maintenance costs
Cleaning Process is SAFE and Environmental Friendly On-Line, Off-Line execution
Why should we keep AFC clean?
■ Chemical Cleaning Procedure preparation • Check the specifications and conditions of fin tube, and calculates the amount of chemicals. In the case of on-line cleaning, the cleaning procedure is planned considering the operation condition. (turn off part of fan and perform partial cleaning stepwise) • The cleaning work team obtains a permit for the safety work instructions and cleaning procedures of the process, and prepares the cleaning tools and cleaning agent. • Prepare a cleaning agent and a utility (water, power) for cleaning, and install a barricade around the unit and work space. If necessary, install a scaffold. Install the water pool under the fin tube bundle for the circulating cleaning method of the cleaning agent. • Wear safety goggles, masks and protective clothing when cleaning. • Before starting the cleaning operation, turn off the fan motor power breaker and local switch and attach off tag. Further, disconnect or tie the fan belt pulleys. Cleaning Step 1. Spray cleaner down over the entire surface of the top of the fin tube bundle with low pressure to let it flow down and allow the fin tube to wet in enough to dissolve the contaminants and flow down to the water pool below. 2. When the upper spray cleaning is completed, the lower pin tube bundle should be spray-cleaned in the same way. The cleaning state is carried out while visually confirmed in real time. Rinsing When finishing of the fin tubes is completed, low pressure water is sprayed to remove any residual cleaning agent and impurities, Cleaning chemical and wash water are treated according to regulations. In general, eco-friendly our cleaning agents are not difficult to treat wastewater. They are drained to Sewer (OWS) and sent to the wastewater treatment process.
■ Fin Tube cleaning result and effect evaluation by temperature trend
Customer Message “The individual banks cleaning looks effective by the significant reduction in max outlet temperature. I am convinced this is an important step to bringing down the D-103 accumulator temperature (Also shown). Thank you for the hard work during this period. “This results has served us well to identify potential applications for this chemical cleaning.”
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GalleryWaterproof canvas and water pool (Preparation for circulating cleaning)Top and bottom cleaningOn line cleaningRising and drain |