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UNIS WHAT WE DO HEATING AND POWER ENGINEERING

HEATING AND POWER ENGINEERING

UNIS is a major supplier of turnkey solutions and additional services to the power industry. As a flexible provider of new power plant complexes (EPC/EPC-M) as well as engineering or conceptual subcontracts alone.

We pride ourselves on our team of highly experienced engineers, offering expertise in project management, time management and logistics, quality management, documentation control, assembly, commissioning and training of operatives.

Throughout its history, the company has developed its own unique boiler solutions for a wide range of customer applications. Such as fluid bed, grate or conventional pulverised coal burner. We supply our customers with complete power plant and heating systems of various technical designs and capacities. We specialize in boilers designed for both steam production and hot water supply. We design boilers for a wide range of fuels such as coal, biomass, oils, gases (including combinations of fuels and waste products), as well as oil and other special liquid fuels. Waste heat recovery boilers are normally installed behind gas turbines (HRSG).

Real results represent technical excellence and total adaptation to the client's requirements from the technical study to the final delivery and installation. Testing, diagnostic services, warranty services and lifetime maintenance or ancillary work during major refurbishment or operational improvements are an integral part of the customer service.

We also provide specific plant components or sub-systems within a plant installation such as boiler island solutions, heating supply and distribution systems including heat accumulation, piping systems including balance of plant equipment, fuel preparation and handling and/or similar.

BOILERS

Heat Recovery Steam Generators

Gas turbines
  • Utility concept (up to any size)
  • Industrial concept (20 - 170 MWe)
  • Gas engines (large installations)
  • Customised design
Large variability of standard solutions
  • Vertical or horizontal
  • Single, double or triple pressure with reheat; DH circuit
  • Hot water applications
  • Supplementary / Fresh air firing
  • Various erection concepts – „O“/“C“ modules, bundles or loose harps
  • SCR and/or CO catalyst

Special Gas/Oil Fired Boilers

  • Range of application
    • D–type – bi-drum packaged boilers - 40 – 250 t/h, up to 80 bar(a)
    • CoGB Compact Design – modular concept - 40 – 200 t/h, 40 – 140 bar(a)
    • Field Erected - 80 – 600 t/h, 40 – 175 bar(a)
    • Hot Water - 50 – 250 MWth, 10 – 25 bar(a)
  • Special gaseous and liquid fuels such as blast furnace gas, coke-oven gas, hydrogen, heavy fuel oil, coking tar and other waste fuels and fuel combinations
  • Bottom or top Supported
  • Primary De-NOx and SCR/SNCR systems

Coal Fired Boilers

Grate Firing
Pulverized Coal Firing (Dry or Wet Bottom)
Fluidized-bed Firing
  • Range of application: 30 – 500 t/h, 40 – 175 bar (a)
  • Wide Range of Coal Quality Experience
  • Re-heat steam system
  • Bottom or Top Supported
  • Primary De-NOx
  • SCR/SNCR Systems

Clean Biomass Fired Boilers

Grate Firing
Fluidized-bed Firing
  • Range of application: 30 – 200 t/h, 40 – 140 bar (a)
  • Different Biomass Fuels such as Wood Chips and Pellets, Sawdust, Straw, Bark, Pulpwood, Cardboard and other Biomass Residues including Agriculture.
  • Coal as a Support/Substitute Fuel
  • Bottom Supported
  • Primary De-NOx
  • SCR/SNCR Systems

RECONSTRUCTIONS AND OPERATIONAL IMPROVEMENTS

We have extensive experience in the field of power plant brownfields, including the integration of new equipment into existing systems. We modernise existing power plants and heating plants and provide servicing for individual equipment. We specialise in boiler reconstruction – increasing the output or operating parameters of existing equipment; improving efficiency and/or operating characteristics, including fuel base modifications and/or additional combustion with complete emission control. We manufacture more environmentally friendly boilers and increase the flexibility and efficiency of the equipment. Our company is highly qualified in the field of NOx emission reduction using state-of-the-art primary measures (low-emission burners, combustion air staging and complex modernization of fuel preparation system) and/or secondary measures (SCR or SNCR). Repair/replacement of damaged parts and components at the end of their service life is part of our range of services.

VARIETY OF SERVICES

  • Conceptual/Basic Design → Equipment Deliveries → Site Assistance
    Broad portfolio of design only services is also part of activities. We offer elaboration of feasibility studies, documentation of technology plant systems for state authority approvals and/or plant conceptual or basic design documentation including project documentation system management. If desired so we also supply boiler design documentation alternatively including notified body approvals for further use by third parties. We can also assist our partners with loose equipment supply (typically boilers) and site construction technical assistance only or support third party construction site with expertise of our site managers and commissioning engineers. We support renovations carried out by third parties.
  • After Sales Service / Tests & Diagnostics
    After sales services is an integral part of our customer support starting from personnel training, technical consultancy and/or equipment performance measurement and following throughout the whole plant life cycle with trouble-shooting support, regular inspections.

As part of testing and diagnostics, we perform technical inspections of boilers, inspections and consultations directly at the installation site. We offer warranty measurements and/or measurements of other operational characteristics including diagnostics and equipment analysis such as residual life-time assessment. We are certified for emission measurements.