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Carpentry: unclogging of filters using a differential pressure sensor

Craft Industry
[ Detailed version of the measure ]
Last update: 31/05/2024
  • Possibility of assistance
  • Subsidies available
  • Innovative solutions

To make this measure more effective and tailored to the specific context of your company, we recommend that you first perform an overall analysis of your energy situation.

Unclogging of dust filters using a differential pressure sensor rather than a timer

Most filter unclogging installations are equipped with a timer which injects compressed air against the flow to remove the sawdust. However, this practice is energy-intensive and does not work if the filters are clogged. Instead of ordering filter unclogging, it would be better to install pressure sensors upstream and downstream of the filters. The operation entails controlling filter unclogging by differential pressure sensor (pressure difference upstream and downstream of each filter), i.e. only when the filter bags are saturated with sawdust and when unclogging is really necessary.

The use of this technology, which has been on the market for over 5 years, can save businesses up to 5% in electricity costs and reduce their carbon footprint. This measure is quite simple to implement, can show a rapid return on investment, and does not require a production shutdown during installation.

Energy and environmental impact

The unclogging timer is set so that the filter operates at maximum capacity. Considering that not all production machines are always running at maximum capacity, timed unclogging overestimates the unclogging requirement compared with reality. Unclogging a filter using a differential pressure sensor will significantly reduce compressed air consumption as it measures the condition of the filter by pressure difference. The production of compressed air has a relatively low efficiency of around 15 to 20%. The decrease in compressed air consumption is estimated at 70%.

Since the filter bags need to be unclogged much less frequently, and since the mechanical force of the compressed air is no longer applied to an unloaded filter bag, the service life of the bags is considerably increased.

Subsidy application

State subsidy application

Please note: any application for government or non-government subsidies must comply with the “incentive effect”, subject to compliance with the subsidy conditions.
To ensure that the incentive effect of the aid is respected, no binding commitments may be made (acceptance of a quote; advance)

  • SME Packages – Sustainability
    • Flat-rate subsidy of €5.000 for small and medium-sized companies for projects to reduce their environmental impact, costing between €5.000 and €6.650 excluding VAT
    • For any questions:

N.B. While several state subsidies cannot be granted for the same project, they can be combined with assistance from energy suppliers.

Subsidies from electricity and natural gas suppliers

Since 2015, natural gas and electricity suppliers are required to make energy savings for consumers under the obligation scheme. Since then, energy suppliers have been offering support and advice, as well as subsidy programmes for consumers to implement energy efficiency measures. The amount of the premium is proportional to the annual energy saving (in MWh). The following suppliers offer this service for companies:

N.B.: Supplier subsidies can be combined with a state subsidy for the same project.

Implementation aid

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