Indirect Gas Heaters (Water Bath Heater)
Mechasol's indirect gas heater consists mainly of firetubes enclosing burners and a coil containing gas to be heated. They are called 'indirect heaters' because a medium (water-glycol mixture or oil) is used to transmit heat (thermic exchange) generated by the burner and received by the gas.
The safety system, which is part of every Mechasol's heater, can detect all operating defects and controls independently the unit under each operating condition, in order to guarantee the correct outlet gas temperature. The heaters can be supplied with regulation and safety systems either of electric or pneumatic type, wherever electric power is not available. In fact, they are installed mainly in remote areas because of their reliability, high performance and low maintenance cost.
Gas Fired Indirect Water Bath Heaters designed in full compliance to API 12K specifications
Natural Draft Burners, directly mounted on Fire Tube. Forced Draft Burners also provided as per requirement
Precise temperature control of Water Bath
Removable Single or Twin Fire Tube Design
Removable Heating Coil for case of maintenance
Burners System complete with Pilot, Main Burner, Gas Train, Spark Igniter with Transformer provided
Flame Arrestors at Burners Air Intake and Stack Top provided
Principle of operation
Mechasol indirect gas heater working operation is due to the circulation of hot water or oil into the shell. The firetube is installed in the lower part of the shell, while the coil to be heated is placed above it.
The burning fuel transmits heat to the firetubes and through these to the water or oil bath; hot water or oil heat the coil walls and consequently the cold gas inside.
For applications where high duty is not needed, electric heaters can be used.
Mechasol design and manufacture of shell and tube heat exchangers for the natural gas industry. The heat transfer medium can be a water and glycol mixture or saturated steam. Horizontal or vertical vessels are built according to international codes and standards.
Skid Mounted Gas Fired Water Heaters
Skid mounted heaters are designed and supplied to control the gas temperature after pressure reduction in gas reduction stations. The unit provide hot water to a shell and tube heat exchanger before the pressure regulators in the station. Skids are custom built and sizes vary from 300 kW to more than 1 MW.
Hazardous Area Electrical Heaters
All hazardous area heaters manufactured by Mechasol can be supplied fully certified to meet the latest requirements of the IECEx Scheme, CSA or the European ATEX Directive.
Electrical heaters can be used to heat the gas prior to pressure reduction. The outlet gas temperature is controlled by a thyristor control panel.
Heaters are certified for use in Zone 1 Gas group II A, B and C.
In addition to a range of standard products Mechasol also designs and builds custom electrical heaters to the customer’s unique requirements. The range of standard products includes air heaters, immersion heaters, line heaters, water heaters, thermostat and transmitter enclosures as well as heating elements.