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  • Users: athomas236
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  1. athomas236

    Didcot B fire

    Does anybody know anything about this fire? Best Regards, athomas236
  2. athomas236

    Noise from Skate Board Ramps

    Dear All, I live in a small village in the UK that has a skate board ramp that is causing a big nuisance to nearby residents. The garden fence of one resident being just 3 metres from the ramp. Does anyone know any regulations or Codes that apply in such circumstances. The Parish Council have...
  3. athomas236

    Sulphur content of fuel oil and superheater fouling

    I am working on a project that includes a 500tonne/hour utility boiler. The fuel oils to be burned in the boiler have sulphur contents that range from 0.1% to 3.5%. In discussions with the contractor he has stated that there is a relationship between the sulphur content of the fuel oil and the...
  4. athomas236

    Low NOx burners and furnace performance

    I am involved in a project with some new 500tonne/hour oil-fired boilers that were designed to the thermal performance standards of an Eastern Block country. The boilers are not performing as expected and it seems that the reasons for this may be that the furnace performance is not as...
  5. athomas236

    B&W Steam 1892

    Just found a copy of B&W's Steam published in 1892. Any suggestions on value. Best regards, athomas236
  6. athomas236

    Burning trees is not always carbon neutral

    Burning trees is not alsways carbon neutral, see link below. http://www.powermag.com/POWERnews/Study-Burning-Trees-Is-Not-Carbon-Neutral_2775.html Regards, athomas236
  7. athomas236

    The effect of SCR on design of flue gas systems

    Gentlemen, I am just beginning to get involved in a project that involves installing SCR on an existing coal fired utility boiler. One of the concerns is the impact of the installation of SCR on the design of the furnace buckstays and ducts. At this time we have little information about the...
  8. athomas236

    Bulk density of fly ash

    Hello, Can anyone tell me which ASTM coade is most appropriate for measuring the bulk density of flyash from the combustion of coal in power station boilers. I have looked in the ASTM year book and searched this forum but found nothing. Regards, athomas236
  9. athomas236

    SCR duct loading

    Hello, I have today been asked to give advice on the design conditions that should be used for the flue gas ducts from a boiler to the SCR back again 600MW units. Each boiler has two ducts from the boiler economizer outlet to the SCR and two ducts from the SCR back to the airheater inlet. Each...
  10. athomas236

    Estimating pH

    Hello, I have two process streams both are water, one is rain water from a coal storage area with an estimated pH of 3 and the other is rain water from paved areas such as roads with an estimated pH of 5.6. My question is if I know the flow rates of each stream, is there any way of estimating...
  11. athomas236

    Main steam pipes without boiler stop valves

    Gentlemen, I am involved in the evaluation of a bid by a Chinese supplier for a boiler supplying steam to a 600MW steam turbine. The main steam conditions for the boiler are 240bar and 570C and the steam pipe will be designed to B31.1. The bidder is proposing not to instal a boiler stop valve...
  12. athomas236

    UK goes windy

    If you to be amused read this. http://www.timesonline.co.uk/tol/news/environment/article6980846.ece athomas236
  13. athomas236

    ASME U stamp and National Board Certificate

    Hello, I have received two documents from a Chinese mnufacturer as follows: 1. ASME Certificate of Authorization to use the U stamp. 2. National Board Certificate of Authorization to apply the NB mark and register items manufactured in accordance with the U stamp. I understand item 1 but I...
  14. athomas236

    Rates of load change for ultra supercritical boilers

    I am involved in an ultra supercritical power project in for which the equipment will be supplied by a Chinese EPC contractor. The Project will consist of 2x700MW coal fired units with boiler steam conditions of 260 bar / 605C / 603C with a main steam flow of 2000tonnes/hour. At the moment...
  15. athomas236

    Building HRSGs at minus 50C

    We are about to become involved with a CCGT project that will be built under winter conditions when the temperatures can fall to minus 50C. We have considered storing the boiler pressure parts in heated warehouses and erecting the HRSGs in a building with a sliding roof or similar through we...
  16. athomas236

    Starting a boiler without oil or gas

    I am working on a specification for a 6MWe(net) wood burning plant and the environment permit states that no fuel oil of fuel gas shall be burned on the site. Two types of boiler have been specified, a vibrating grate and a bubbling fluidised bed. Without gas and oil, any ideas about how to...
  17. athomas236

    NPSH margin and ANSI/HI 9.6.1

    Gentlemen, I have been asked to investigate what NPSH margin should be applied to power plant boiler feed pumps. I have discovered that ANSI/HI 9.6.1 addressed this particular matter. However, although this standard was re-confirmed in 2000, it appears that it was withdrawn in 2003. As far...
  18. athomas236

    A little fun with boiler fans

    Gentlemen, I am working on a power project in South America that involves three sub-critical boilers. The specification for the fans says that the test block conditions should be determined with the boiler operating at 100%BMCR with the following margins: FDF IDF...
  19. athomas236

    Pressure part inspection companies - Asia

    Gentlemen, I am involved in a project in South America that involves 3x360MWe coal fired conventional subcritical units located at two sites. The pressure parts for the boiler and turbine islands will be designed and manufactured in accordance with ASME standards. The contracts have been...
  20. athomas236

    ASME P91 hardness measurements and acceptable values

    Gentlemen, I am involved in a HRSG project in the Middle East that makes extensive use of ASME P91 (A335, A234 and A182). As a result of concerns over weld quality, the contractor has appointed an inspection company to make hardness measurements on all pipe to pipe and pipe to branch welds and...

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