Products

Heater with intermediate heat transfer agent

Heater with intermediate heat transfer agent is designed for heating oil emulsions in oil collection and transportation systems, as well as natural or associated gas, industrial waste water in gas distribution units in gas- lift oil extraction system.

Heater models:
– single-flow on one fuel type PPT-0.2G; PPT-0.2Zh;
– single-flow on gas fuel with non-volatile burner PPT-0.2Gen.

Design and operation of oil heaters with intermediate heat transfer agent of the PPT-0.2 series and components

Heater is made in the form of cylindrical container on a frame. Lower part of the heater has a furnace with gas or liquid fuel burner, upper part has tubular product coil and fuel heating coil. Internal volume of the vessel is filled with liquid heat transfer agent (water, antifreeze), which transfers heat from the furnace to the coil. Vessel is equipped with a heat transfer agent expansion tank and breathing valve.

Four-section product coil is made of steel pipes. Each section is a two-way flat spiral made of steel pipe with diameter of 76 mm and wall thickness of 5 mm.

Base frame is a welded structure made of rolled profiles intended for installation of the vessel, control cabinet, fuel treatment cabinet and heat-insulating casing. Heat-insulating casing is assembled from panels.

Heater automation system provides for remote ignition of the burner with preliminary ventilation of furnace by natural draft through the stack, regulation of product heating process, activation of operating and emergency alarms, automatic protection of the heater in case of deviation of the controlled parameters from standard values, heating of local automation cabinet at below-zero outside temperatures.

Automation system ensures transmission of information to the upper level about emergency shutdown of the heater with explanation of shutdown reason via wired communication channel over a distance of up to 1000 m.

Process of oil heating process is as follows: heated product enters product coil of the heater, heated by the intermediate heat transfer agent to the specified temperature, and then discharged from the heater.

Fuel enters the fuel coil located in the vessel, heated to the specified temperature and supplied to the fuel treatment unit. After cleaning and reduction in the unit, fuel is supplied to the burner. Combustion products are removed through the stack by natural draft.

Automation system PPT-0.2G/Zh
Automation system is designed for automatic control, monitoring, regulation of the processes and is a part of line heater (remote ignition of burners, regulation of oil heating process, activation of operating and emergency alarms, automatic protection of the heater in case of deviation of the controlled parameters from standard values). The system is not designed for operation in explosive areas and areas containing aggressive substances in the air.

Automation system provides:

• Local visual control of the main process parameters
• Automatic regulation of fuel gas pressure supplied to burners and product heating temperature
• Automatic ignition of pilot and main burners with preliminary ventilation of furnace space by natural draft
• Automatic shutdown and locking of heater start-up program with sound and light alarm in case of deviation from the set values of main process parameters:
  – decrease of fuel gas pressure downstream control valve lower than permissible value;
  – increase of fuel gas pressure downstream control valve higher than permissible value;
  – increase of heated product pressure at heater inlet over 6.3 MPa;
  – decrease of  intermediate heat transfer agent level;
  – increase of intermediate heat transfer agent temperature in the heater over 95°C;
  – flame-out of main burners during heater normal operation;
  – flame-out of pilot burner during ignition;
  – malfunction of flame control channel;
  – power outage.
• Operating warning alarm according to the following parameters:
  – presence of supply voltage;
  – completing the ignition program;
  – presence of pilot and main burner flames;
  – operation of control and display panel curtain.

Automation system ensures transmission of information to the upper level about emergency shutdown of the heater with explanation of shutdown reason.

System has two design options:
– cabinet-mounted – secondary units are placed inside the insulated, heated cabinet, cabinet is placed outdoors in close proximity to the heater (in non-explosive area);
– wall-mounted – secondary units are placed inside enclosed, heated, non-explosive room with ambient temperature +5...+35°С.