Heat exchangers

In principle, heat exchangers are non-rotary energy-producing machines in which energy is transferred by heat flow between systems. A plate creating the heat transfer surface separates individual media. 

  • According to the design of heat transfer surface tubular and plate heat exchangers are the most widely used.
  • Tubular heat exchangers can be classified according to different criteria such as horizontal and vertical ones.
  • The tube bundle may consist of two tube sheets and a system of straight tubes or a single tube sheet and U-tubes.
  • The tubes may be plain straight, spiral or finned etc.
  • The tube material may be carbon steel, corrosion resistant steel, titanium, non-ferrous metals and alloys.
  • The plate heat exchangers usually consist of a system of stamped sheet metal allowing media flow.

This is one of the most traditional products in regard to a large variety of types, shapes, design layout, size, output and use. As their producer, PBS INDUSTRY has been in the market for more than 50 years attracting a wide range of customers at home and abroad. These involve direct deliveries to end customers as well as a form of subcontracting within large investment units.

Condensers

  • These are especially surface condensers used in power industry as part of a standard closed steam cycle in power plants (boiler - turbine - condenser - boiler ...). In surface condensers there is no contact between the cooling water and steam; in principle they are tubular heat exchangers with straight tubes. Downstream of the turbine in the condenser the condensing heat of steam is transferred to the cooling water and steam changes into condensed fluid - water, which is pumped back into boiler. Phase transition from steam to water in the condenser contributes to the expansion of the steam in the turbine thus affecting its efficiency.
  • By design we distinguish between radial condensers where the turbine is located on the floor level above the condenser with top steam inlet and axial ones where the turbine is on the same level as the condenser with a side steam inlet into the condenser.
  • The condenser shell is usually made of carbon steel. The inlet and outlet cooling water chamber is most typically made of carbon steel, in specific applications dedicated material is used, e.g. resistant to salt water where sea water is used for cooling. Heat transfer tubes are made in material variants of  corrosion resistant steel, titanium and less often brass.

Dimensions of heat transfer surfaces produced in PBS INDUSTRY range from 650 to 4,500 square metres. The weight range is from 20 to 125 metric tons. We supply these significant products to the world’s leading players in the power industry. Our company has been involved in manufacture of these types of equipment for more than fifteen years having delivered around 35 different types of equipment to our customers. 

Pressure parts of boilers and accessories

The systems manufactured and delivered by PBS INDUSTRY also include fossil fuel-fired water-tube steam boilers including accessories up to the output of 300 t/h of steam. There are also large-range output hot water boilers of similar design. Our production programme includes fuel gas boilers utilising heat from various external sources such as flue gases at the outlet of gas turbines, or utilising heat from previous chemical technology of outputs of up to 25 t/h of steam or 15 MW of hot water. In the water-tube boiler segment there are also so-called packaged boilers delivered in a compact block to provide steam outputs of up to 25t/h. We also offer a lower-output and lower-parameter flue boilers with outputs from 1.5 t/h up to 20 t/h of steam or 1.3 MW to 15 MW of hot water.

In addition to tube systems of pressure boiler parts PBS INDUSTRY deliveries contain an extensive range of accessories. In particular, these are fluidized-bed boiler components, stop valves and complete system of boiler coaling feeding and ash removal. There are also steam blowers and water washers for the cleaning of heat transfer surfaces.

Boilers and boiler parts and accessories belong among the oldest, most original and traditional products within the PBS INDUSTRY product structure. They are linked to the very roots of our company history going back as far as 1885 when the Wallig Company was established. They involve deliveries for leading entities in the power industry engaged in the construction or renovation of power or heating sources worldwide.  When it comes to boiler accessories the deliveries are most often made directly to end operators of these resources.

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