InnovationValorisation

The inventor's files
Pour trouver,
il faut d'abord chercher

The Innovation Portal

Return

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

P.T.C. System

and

GASWASH Process


Example for purification of a biogas and obtaining pure biomethane

This innovative "One-pot" process consists in capturing gaseous pollutants in a physicochemical treatment whose liquid effluents are subsequently digested by the aerobic bio-purification process in the treatment plant.

(A)    Simultaneous process of absorption (capture) and organic chemical modification of Volatile Organic Compounds (organic and inorganic).
This operation is carried out in a single operation on a collection installation by physicochemical washing.

(B)  The final destruction of the capture products after the simultaneous process of absorption and chemical modification
This ultimate operation (B) is carried out in a biological treatment plant. The organic compounds present and formed During the condensation reaction are digested by the process of natural aerobic bio-purification of the purification plant.

The originality of the process resides firstly in the choice of the reagent which combines with the pollutants to be treated and secondly in the final natural destruction in the wastewater treatment plant that does not generate any new gaseous pollution.

The example below describes the treatment of 100 m3 of biogas from the methanisation of sludge from an urban sewage treatment plant. (test on a biogas line for sludge drying).

EQUIPMENT USED:

  • Absorption column 800 liters (column + tank), height: 3 m., base area: 0,28 m2 (diameter 60 cm), tray lining, demister out of air.
  • Fluid circulation pump adjustable from 0 to 25 m3 / H.
  • Adjustable pollutant effluent gas supply valve from 0 to 1000 m3 / h.

AVERAGE COMPOSITION OF THE BIOGAS TO BE TREATED:

Air flow with a flow rate of 100 m3 / h. containing:

  • Methane: 98.6% (98.6 m3)
  • Miscellaneous impurities (minority compounds): 0.4% (0.4 m3) of which:
    • H2S: 10.618 mg / m3
    • Mercaptans: 207 mg / m3 (Ethanethiol, methanethiol, propane and butanethiol)
  • Eventually traces of siloxanes

 

The base and reagent quantities are calculated from the attached spreadsheet.

 



Matériel type

OPERATIVE CHARGE FOR DEMONSTRATION

  • Water: 400 L.
  • 30% soda: 33.5 kg
  • 40% reactive: 36.9 kg

VALIDATION OF THE DEMONSTRATION OF TREATMENT

This demonstration allowed an expected run time of 4 hours.
During this period of operation, regular checks of the effectiveness verified the absence of H2S at the exit of the industrial installation in place.

Results: Absence of H2S validated at the column exit.

Cost materials of the treatment: 26 € for the 4 h. Operating.
By way of comparison, a conventional treatment with bleach would have cost 127 €

The operation was carried out over a period of 4 hours with a gas flow rate of 100 m3 / h.
The end of the reaction is controlled by pH-metry (about pH = 9) and the absence of H2S verified with lead acetate paper. The reaction medium is colorless and odorless.

CONCLUSIONS OF THE DEMONSTRATION

Total elimination of H2S and mercaptans during a 4 hr operating period.

In this test, it is clear that for the destruction of sulfur impurities, treatment with bleach is 2.5 times more expensive than treatment with the GASWASH process.

  • This example of biogas treatment includes:
  • Complete elimination of H2S and mercaptans.
  • Lowering the 4% water of methanation to 40 ° C. (1 to 1.5%)
  • Total elimination of siloxanes and organochlorines or fluorinated if present in trace amounts.

In this example, the GASWASH system was used to purify 100 m3 of biogas, which supplied 98 m3 of pure biomethane but also of H2S and mercaptans.

TREATMENT REVIEW

The 98 m 3 of methane obtained with purity greater than 98.5% (biomethane) obtained can be used as an energy source or as a precursor for the manufacture of biohydrogen, for example with the VABHYOGAZ process.

Cost for treatment with the GASWASH process:

Treatment of 100 m3 of biogas: 26 € Either for a production of 98 m3 of methane for: 0,265 € / m3 or 2,68 cts. € / kWh

ANNEXE


Energy equivalence



See also the examples of the DAVID Process - Odors

Return

To write to us

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 


Copyright © Innovalor depuis 1999
SIRET 510 692 726 00019 - Code APE 4791A
Tous droits réservés - Marque déposée ®
|
Webmaster | Mentions légales