A lifetime commitment
Aalborg Industries has been a leading supplier and manufacturer of boilers, burners, heat exchangers and inert gas systems for several decades.
The company offers solutions to three main industries, which are oil and gas, marine and industrial. Within the marine sector, the business traces its history to as far back as 1919 when it was a boiler engineering and manufacturing company.
From its origins as part of Aalborg Shipyard, Aalborg Industries grew to supplying marine boilers to other shipyards internationally and developed a business for the supply and service of industrial and power station boilers. Since the late 1960s, the organisation has carried out boiler services around the world, and in 1978 it opened its first subsidiary abroad. In the past decade, investment into additional resources has strengthened the company's expertise in service and equipment supply for floating production systems for the offshore market.
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Today, the business operates on a global basis with product centres located in Aalborg, Nijmegen, Rotterdam, Kobe, Rauma, Singapore, Sydney and Petrópolis, while the major factories are located in China, Denmark, Brazil and Vietnam. Furthermore, the Aalborg Industries group is a private limited company owned by Nordic investment companies.
The organisation has been involved in the oil and gas industry for several years. Over time, a number of large projects have been performed, including the installation of new boilers with complete burners and control systems, boiler retrofits, as well as boiler repairs and conversions. Most of the company's systems have been installed as complete modularised units on deck in hazardous areas, exposed to harsh weather conditions. Some of the systems have been installed in ordinary engine rooms based on normal marine standards.
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Finn Poulsen, business director for the oil and gas area comments: 'Initially the oil and gas market wasn't that big and our FPSO business was small as well. Continuing as a market leader, this situation has changed dramatically – there are now approximately 200 FPSOs in operation, and this is likely to continue growing. Having identified these growing opportunities, the FPS Business Group was formed in January 2007. The FPS Business Group is dedicated to providing systems for FPSOs in the oil and gas market.'
Aalborg Boiler Manual
He continues: 'Over the past couple of years, we have been developing our products so they are more suitable for the demands and needs of this market. Today, we offer boilers with large capacities for steam, hot water or thermal fluids, burners for gas and oil firing, control systems, heat exchangers, inert gas systems and boiler conversions and retrofits.'
In addition to this, Aalborg Industries has the knowledge and experience to offer complete heating solutions. Its boiler supply includes control and burner systems using single fuel, dual fuel, or multiple fuel burners for gas, crude, diesel, or heavy fuel oil. Together with its customers, Aalborg Industries identifies the conditions and specifications for the project and optimises the system – always focusing on costs, delivery schedules, the quality of products and services, as well as on the most reliable operations. Thanks to its wide product range the company can offer competitive solutions for any project.
Finn comments: 'One of our key strengths is our ability to offer a one-stop-shop solution. Within the Aalborg group, we have everything we need to provide a complete solution. We have our own boilers, combustion equipment, inert gas systems, installation teams and module design. This means customers only have to deal with one partner, which reduces their costs and improves efficiency.'
Another of the organisation's strengths is its focus on safety. In addition to the combustion hardware offered in any offshore conversion or refurbishment project, Aalborg Industries also specialises in control systems and has an SIL 2 rating (safety integrity level). Due to the critical nature of the control systems, there is a requirement for high integrity level, high availability, high level of diagnostics, and high reliability. Hardware selection and engineering should meet internationally recognised codes and standards such as IEC 61508 and DIN 19250.
Aalborg Industries' equipment is designed and manufactured to last. Therefore the company has built up an extensive customer base around the world. Comp128v2 clone software. Furthermore, clients can always count on Aalborg Industries to be at the forefront of the industry, especially when it comes to optimising equipment performance and constantly improving efficiency in a cost-effective manner. Looking to the future, Finn concludes: 'I believe that the oil and gas market looks promising for the next few years and we will continue to develop products, which bring real benefits to the industry.'
Aalborg Industries Vicon 247 disc mower parts manual.
Products: Boilers, WHR, burners,control & safety, heat exchangers and inert gas systems
When the boiler is started, the lighten-up rate of the boiler must not be accelerated too much as this might cause an unnecessary over strain of the boiler material by quick and uneven temperature rises. It might be necessary to perform a number of start/stop sequences to reduce the lighten-up rate.
At the commissioning start-up of the boiler and after any repair work of the refractory, it is very important to further reduce the lighting-up rate. This is because the new refractory still contains a small amount of water. When heated the water vaporises and expands which might cause fissures and cracks in the refractory. The burner must therefore only be operated at minimum load and in intervals of 1-2 minutes for the first hours. Tomb raider 9 for mac. Between each operation interval the burner should remain stopped for approximately 8-10 minutes. The article explains starting and stopping boiler during normal and emergency working conditions.
Aalborg Mission Os Boiler Manual
Precautions on Starting Boiler
Before start-up of the boiler plant, following general work and check procedures must be considered.
- Check that the main steam valve, by-pass valve and circulation valves if provided, scum valve, and blow-down valves are closed.
- Open the feed water valves and the air valve. Fill the boiler with feed water to approximately 50 mm below normal water level. The water level rises due to expansion when the boiler is heated. If the temperature difference between the boiler and feed water exceeds approximately 50ºC, the boiler must be filled very slowly.
- When filling a pressure less boiler, the shut-off valve after the feed water pump must be throttled. Otherwise the pump motor will be overloaded.
- Check the water level in the water level gauges. Check frequently during the complete start-up. The water level gauges should be blown down several times to ensure a correct indication.
- Check that the water level control system is connected and operational.
- Check the oil system and start the fuel oil supply pump. Pre-heat the fuel oil if the burner should operate on heavy fuel oil.
- Check the burner and the safety functions according to the manufacturer instruction.
Starting Boiler and Pressure Rise
The following work procedures must be followed during start-up of the boiler.
- Check that the gauge board valve and pressure gauge valves are opened.
- Check that the air valve is open if the boiler pressure is below 1.0 bar.
- Start the burner on manual control and on low load. Check that the water level does not rise too high during the pressure rising period.
- Drain via the blow down valves if the water level is too high.
- If the air valve was opened close it when only steam blows out. A pressure reading should be indicated on the boiler pressure gauge before the air valve is closed.
- Tighten all covers such as manholes, hand holes, inspection doors, etc. during the pressure rising period. If required, check all flange joints on the plant.
- Change to automatic control of the burner when the boiler pressure is 0.5 bar lower than the working pressure of the boiler.
- Open the by-pass valve slowly to heat-up and pressurise the steam system. If the boiler is not provided with a by-pass valve, the main steam valve should be used to heat-up and pressurise the steam system.
- Open the main steam valve and close the by-pass valve.
- Open the valves to the steam consumers carefully in order to avoid water chocks.
- When the boiler is in normal operation, check that the water level control system and the gauge board functions are fully operational.
After 3-4 weeks in operation, mud and deposits in the piping system may have accumulated in the boiler water. This may cause level variations which disturb the steam generation, and it is therefore recommended to blow down the boiler. It should then be inspected, cleaned, and refilled with boiler water.
Stopping Boiler
Normal boiler shut down
If necessary, the boiler can be shut down at any load without special preparations.
When the boiler is stopped, sudden temperature and pressure drops should be avoided as they might expose mountings, pipe lines, and the boiler plant to inadmissible temperature gradients.
- When minimum load is obtained, stop the burner.
- Keep the water level at normal level until the boiler stops producing steam.
- Stop the feed water pump and close the feed water valves.
- Close the main steam valve.
Emergency shut down
The boiler must be taken out of service immediately if parts of the heating surface have been glowing or the boiler shows recognisable deformations.
The supervising authorities must be informed, and the boiler must not be used until approval from these authorities is available a substantial loss of water is noted the feed water system is unable to provide the necessary amount of feed water, e.g. due to failure of parts the safety valve cannot function sudden cracks or damage are noted in the refractory, and if steam or moisture is coming out of the refractory oil in the feed water is detected too high salinity level is detected.
If an emergency shut down must be carried out, the fuel supply should be stopped. The main steam valve should be closed gradually, and the boiler must be cooled. The safety valves must not be operated. Parallel working boilers should be disconnected at once.
Stop for repair or inspection
The following describes the measures to be taken when the boiler is shut down for repair or inspection.
- Clean the boiler from soot with water.
- Operate the burner for at least 15 minutes after the soot removal to dry out the remaining water.
- Stop the boiler as mentioned previously.
- Check the furnace and the pin tubes with regard to cleanliness.
- Empty the boiler from water and clean it. Check if lime stone appears.
- Check and clean the outer fittings. Change gaskets where required.
- Clean the feed water tank and feed water pipes.
- Clean and grease the bearings of motor, pump, and fan.
- Check and align the burner, if necessary.
- If the boiler is shut down for a long period of time, the pin tubes must be thoroughly cleaned.
- Check that the necessary spare parts are available. Order complementary parts in time.
It is of extreme importance that the boiler is NOT operated without water when the oil burner is in operation, e.g. due to disconnection of the water level safety devices. This will immediately cause complete break down of the boiler.
Reference:
MISSION™ OL Boiler Manual by Aalborg Industries
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