Energy from thermal recovery of industrial processes

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Energy from thermal recovery of industrial processes

From exhaust gas of endothermic engines, gas turbines and process furnaces

Energy coming from exhaust gas of endothermic engines, gas turbines and process furnaces

Water pipes

ERTA-WTE-VS-HR      ERTA-WTE-VSH-HR

The ERTA-WTE-HR water-pipe boiler, has developed from a project which dates back to the 1950’. It is the ideal solution to be installed downstream of any industrial process where it is necessary to recover the sensible heat in the flue gas with high dust concentrations to produce saturated or superheated steam.
It has vertical water pipes, with natural circulation with combustion gas flow parallel to the membrane walls which form the radiant chambers.
The radiant and convection sections are made of a series of vertical channels containing the platens, the superheater and evaporation benches. These latter sections consist of sub-horizontal pipes and are suitable for the installation of automatic cleaning systems
Downstream of the generator are installed the economizer’s banks for feed water heating in order to further recover the sensible heat of flue gas and thus increase the overall thermal efficiency.

ERTA-VS-HR      ERTA-VSH-HR

The ERTA-HR series saturated or superheated steam generators, water pipe type with natural circulation, have been designed to recover the sensible heat of exhaust gas from turbines or endothermic engines powered by natural gas.
The boiler consists of the following main components:
The front screen: heat exchange section situated near the hot flue gas inlet to the recovery system, made with vertical carbon steel pipes, connected to the steam drums by means of welding and / or expanding.
The steam superheater: consisting of a tube bundle made of a series of multiple rank horizontal coils.
The evaporating section: consisting of a multiple series of finned tubes with vertical arrangement and quincunx pattern. The tubes are directly connected to the steam drums by means of expanding.
The steam drums: consisting of ferrules closed at both ends by convex heads and equipped with manhole; the whole is joined by means of submerged arc welding, with approved procedure. On the upper drum are also provided main and auxiliary steam intake nozzles, vent, safety valves and fittings. The economizer section: consisting of a series of finned tubes with horizontal arrangement for the further recovery of the sensible heat of flue gas in output from the boiler, capable of preheating the feed water of the boiler itself.
To further increase the total efficiency of the whole, it is also possible to provide a finned coil to be installed downstream of the economizer for hot water production.
The steam generator is externally insulated with mineral wool panels of suitable thickness and density and externally covered with corrugated sheets in galvanized steel or aluminum. The steel structures exposed are finished on the surface with a suitable coating treatment.
These boilers are supplied complete with all the necessary control, regulation and safety instrumentation.

TECHNICAL FEATURES

NAME ERTA-VS-HR    ERTA-WTE-VS-HR  ERTA-VSH-HR    ERTA-WTE-VSH-HR
CAPACITY (MW) up to 40 in post firing up to 40 in post firing
TEMPERATURE (°C) saturation temperature up to 520
PRESSURE (BARa) up to 100 up to 100

Multitubular

MT-AC-HR    MT-AS-HR    MT-FD-HR

The MT-HR series heat generators have been designed for installation downstream of an industrial process with high dust concentrations in the flue gas
The design of the radiation chamber and convection tube bundles with vertical flue gas movement, ascending and descending, and the installation of special soot blowers allows a better thermal exchange and prevents soot from being deposited on the tubular surfaces.
The soot is collected in the hoppers under the radiant chamber and the convection tube bundle and automatically discharged through double flap gate valves. It is also possible to install a chain conveyor for the ash collection and transport to a suitable waste container.
The thermo-fluid dynamic characteristics of these generators have been designed to ensure maximum reliability and the highest performance under any load conditions, a regular and long-term operation even in case of heavy duty applications.
To further increase the total efficiency of the whole, it is possible to install downstream of the convection bundle, an economizer and / or an air heater, both also affected by the automatic soot blowing system.
For maintenance and cleaning services on the heat generators are provided ladders and platforms for access to the inspection doors.
The construction materials used are high-quality steels and the welding is done with manual and / or automatic technique by skilled personnel. All construction stages are checked by our internal quality control system.
The MT-HR series boilers are externally insulated with mineral wool panels of suitable thickness and density and covered with corrugated sheets in galvanized steel or aluminium. The steel structures exposed are finished on the surface with a suitable coating treatment.
These boilers are supplied complete with all the necessary control, regulation and safety instrumentation.

TECHNICAL FEATURES

NAME MT-AC-HR MT-AS-HR MT-FD-HR 
CAPACITY (MW) from 2 to 35 from 2 to 35 up to 2 to 30
TEMPERATURE (°C) up to 100 up to 220 up to 350
PRESSURE (BARa) up to 30 up to 50

Flue gas pipes

NLS-AC-HR   NLS-AS-HR   NLS-VS-HR   NLS-VSH-HR

The NLS-HR series heat recovery boilers have been designed to recover the sensible heat in the exhaust gas of endothermic engines which use liquid fuels, natural gas, biogas, or that are installed downstream of gas turbines or industrial processes.
The NLS-HR generators can produce hot or superheated water , saturated or superheated steam according to the different configurations.
It is a flue-gas pipes boiler with one or more passes.
The tube bundle is fixed to the plates by means of expanding and welding.
The welding operations of shell and tube plates are performed with automatic submerged arc process; the welds undergo non-destructive testing.
The smoke cases, front and rear, are suitably insulated and equipped with access and inspection doors.
These generators are supplied complete with all the necessary control, regulation and safety devices.

In order to obtain a better thermal efficiency it is also possible to install an economizer, made of a series of smooth pipes, at the boiler’s flue gas outlet, suitable to preheat the feed water prior to entering the boiler. The economizer is equipped with a framework which forms the pressurization, provided with inspection doors and adequately insulated with mineral wool and covered with aluminum sheet.

TECHNICAL FEATURES

NAME NLS-AC-HR NLS-AS-HR NLS-VS-HR NLS-VSH-HR
CAPACITY (MW)) up to 25 up to 25 up to 25 up to 25
TEMPERATURE (°C)) up to 100 up to 220 up to 220 up to 350
PRESSURE (BARa) up to 50 up to 50 up to 50 up to 50

SERPENTINI COASSIALI SERIE fdV-hR

Coaxial coils

FDV-HR

The thermal oil boilers series FDV-HR have been designed to be installed downstream of an industrial process with low dust concentrations in the flue gas.
They consist of a tubular structure with helical concentric multi-start coils made so as to allow a correct and adequate oil circulation.
The welding of the pipes is performed by qualified personnel and undergo non-destructive testing.
The tube bundle which forms the heat exchange coil is housed inside a metal ferrule to obtain a perfect flue gas seal.
The upper and lower smoke cases are provided with access and inspection doors.
The heat generator is insulated with mineral wool and is externally covered with a sheet of corrugated galvanized steel or of stainless steel.
These generators are supplied complete with all the necessary control, regulation and safety devices.

TECHNICAL FEATURES

NAME FDV-HR
CAPACITY (MW) from 2 to 30
TEMPERATURE (°C) up to 350
PRESSURE (BARa)

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