The DUCOVA team is highly skilled in the art of energy savings. This section features various installations as well as innovative and tested means of increasing the efficiency of your steam system.
The efficiency of a steam system requires the annual monitoring of steam traps. In this regard, DUCOVA can carry out your technical surveys.
The concept of steam-condensate closed systems consists of returning the condensate and flash steam to a pressurized receiver tank. When we realise that the condensate contains between 18 to 23 per cent of the total heat of the entire steam system, it is very interesting to recover all that often difficult to manage and often hated energy. Moreover, you reduce the need to use anticorrosive chemical treatment products. This system also eliminates the need for most mechanical condensate pumps. When applicable, this is the most efficient means of recovering energy in a steam system, as well as generating significant and, in some cases, considerable savings.
The following illustration demonstrates an open system.
DUCOVA IS HIGHLY SKILLED IN THE DESIGN AND APPLICATIONS OF CLOSED SYSTEMS
The following illustration demonstrates a closed system (SCCS). Note the absence of condensate pumps, condensate tanks and the elimination of flash loss.
Why deaerate steam systems?
Though essential, the elimination of noncondensable gases from steam systems is often neglected. De-aerating improves the energy efficiency of steam systems and reduces corrosion.
The presence of noncondensable gases in steam systems reduces the steam's partial pressure and, consequently, steam temperature, which renders energy transfer more difficult. This then necessitates an increase in evaporator pressure to maintain the same temperature. A higher consumption in combustibles is thereby required, which in turn increases costs. Moreover, the presence of noncondensable gases, such as CO2, increases corrosion, and thereby causes an overconsumption in anticorrosive products and frequent repair. Deaeration avoids all of these useless costs.
How do you deaerate?
To deaerate, we install thermostatic air vents comprised of a finned tube and a GESTRA steam trap equipped with an H-capsule. Upon starting up the system, the thermostatic air vent is opened and allows the air out and then closes once it has escaped. This vent also allows for constant deaeration. The finned tube creates a cooling point where condensation is enhanced, thus concentrating the noncondensable gases to be expelled by the thermostatic device. Once gases have been completely purged and pure steam is detected, the thermostatic steam trap closes.
Here is an example of how deaeration applies to steam vents:
This illustration demonstrates where thermostatic vents should be installed on a steam line. Fastened to each pipe turn and at the end of the lines, the vents ensure the maximum elimination of air at system start-up and eliminate noncondensable gases as soon as possible.
Do not hesitate to contact your DUCOVA Representative for more information.
DUCOVA carries out a technical survey to verify the state of steam traps, which includes:
The survey report presented to you will include the following:
The survey carried out by DUCOVA technicians has many advantages:
Performance review of biomass fired thermal power plants
DUCOVA experts inform you of the exact state of your installations such as their current and potential output. The superior quality of the information gathered ensures efficient decision-making and proper management of your power station.
Always with the intention of making clear recommendations based in fact, the surveys carried out by our specialists rigorously gather the following data:
Service agreements for combustion control systems
Always with combustion optimisation in mind, DUCOVA adapts service agreements to meet the specific needs of each installation.
The efficiency of your control system and its components is essential to the proper functioning and the feasibility of your facility. You must, therefore, be vigilant.
Always adapted to the particular requirements of each control system, the service agreement can include the following services:
Control strategy implementation for biomass combustion
DUCOVA has developed two control units, especially designed for the wood processing industry, to automate thermal power plants that use wood-residue based combustibles.