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Anyone know of a boiler that will run on Methane?

Discussion in 'Plumbing and Central Heating' started by EddyP, 20 Feb 2009.

  1. EddyP

    EddyP

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    I'm doing a bit of a feasibility study for one of my sites at work, the admin block is currently heated by electric convector heaters, i've worked out this is costing us approximately £14k/year.
    As the site is a sewage treatment works we have a plentiful supply of methane, so i'm considering if its possible to get a combi boiler that will heat the admin block and run on this gas that we have.

    Any one know?

    Thanks
     
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  3. natural gas is methane.
     
  4. EddyP

    EddyP

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    Ok then, biogas, I know its different to natural gas, as some of the boilers we use for heating parts of the process run on it but require different burners.
     
  5. oilman

    oilman

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    It would probably be better to run a generator on the methane, and use the heat from the generator to do the heating, and you will then have a more valuable fuel in the form of electricity which you can use and sell the excess.
     
  6. Paul Barker

    Paul Barker

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    I wouldn't expect there to be a huge difference, natural gas contains trace amounts of ethane and is adjusted with propane and butane to control calorific value but it isn't significantly different to pure methane.

    However a CHP is a good move. Loads of stuff on the net about using methane in petrol and diesel engines.
     
  7. EddyP

    EddyP

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    Theres already a 0.5mW CHP on site, however the heat from it is used for parts of the process on site, there isn't really any waste heat available, it may be an option to install a smaller unit in addition to it for the admin block heating though.
     
  8. Agile

    Agile

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    0.5 mW is such a small amount of power that you would get more by blowing down a straw!

    Most worthwhile CHP industrial units are upwards of 0.5 MW ( or 500 KW ! )

    Do you have to change your clothes and shower before going to the shops or a restaurant after work?

    The sewage plant near Slough can be smelt for miles around in the summer! I spent a few afternoons walking round it looking for a suitable site for an MF broadcasting transmitter ( about 30 kW RF power ).

    Tony
     
  9. WDIK

    WDIK

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    generally they are about 200kw/ hr.
     
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  11. WDIK

    WDIK

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    on the subject of Biogas.

    there is no specific content of methane in biogas.

    tops its 60% methane.

    the rest is CO2 sulphides and volatiles

    you couldnt even begin to imagine exposing a low nox burner to that.

    one of the after combustion precipitations are sulphuric acid crystals.


    so no I dont think a combi would work on bio gas ;)
     
  12. 75pete

    75pete

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    I have never known a sawage works not to have a back-up dual fuel boiler.
    if the chp is down for time the boiler would be needed or the process would be in danger.
    A new pipe line to supply the new boiler should be of ss steel and the boiler should also be duel fuel or you run the risk of no heating
    You are talking ££
    Expect your ./. methane to be 65ish and wet
     
  13. D_Hailsham

    D_Hailsham

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    Many years ago I visited a sewage works which had an electricity generator powered by an engine running on the methane produced. This produced enough electricity for the complete site; the excess was sold to the CEGB.
     
  14. oilman

    oilman

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    That makes no sense.
     
  15. EddyP

    EddyP

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    Which is what we do.

    Apologies with the typo, its a half megawatt CHP, not a half milliwatt lol, I beleive on this particular site, its all exported to the grid not used on site.

    And yes there are back up systems for when the CHP is down, this is the boilers I talked earlier.

    However there is no system in the admin building.
    I'll speak to the people that supply our other boilers, they might know.
     
  16. JPH/01

    JPH/01

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    About 25 years ago I fitted a boiler at a sewage treatment works,this had a nu-way burner designed for natural gas.
    After some advise from nu-way and a bit of trial and error it ran very well on the methane harvested directly from the works.
     
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