PurposeThe heater is used for heating of oil, emulsified oil, gas or oil-n-gas mixtures for processing and district heating purposes at oil and gas fields.
Technical Data
| Nominal heating capacity range | MW (Gcal/h) | 120 (0,1) - 0,73 (0,63) |
| Oil capacity range | kg/s (t/day) | 1,2(100) – 5,8 (500)* |
| At water concentration, max. | % | 30 |
| Pressure at coil inlet, max. | MPa (kgf/cm 2) | 6,3 (63) |
| Differential pressure in coil, max. | MPa (kgf/cm2) | 0,2 (2,0) |
| Temperature: product inlet to heater, within | °Ñ | 5 |
| product heating, max. | °Ñ | 80* |
| Intermediate heat carrier (sweet water) heating, max.: | °Ñ | -100 |
| Heat carrier volume (sweet water) | ì3 | 4,0 |
| Medium heated | ||
| Viscosity at 20°C, max. | ìì2/ñ | 100 |
| acid gases concentration: | ||
| hydrogen sulfide (Í2S), max.: | % mol. | 0,01 |
| carbon dioxide (ÑÎ2), max. | % mol. | 1,0 |
| Fuel for PPT-0,2G | gas | |
| Fuel for PPT-0,2J: | Liquid fuel: diesel fuel, oil | |
| Efficiency, max. | % | 80 |
| AC power supply to instrumentation: | ||
| voltage | Â | 220 |
| frequency | Hz | 50 |
| Dimensions of furnace (length õ width õ height), max. | m | 5,6 õ 2,77 õ 8,24 |
| Mass of inoperative heater, max. | tons | 5 |
| Climatic design | “U” Category 1 as per GOST 15150-69 | |
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7. Fuel treatment cabinet 8. Heat carrier filling connection DN100; RN0,1(1,0). 9. Product inlet DN65; RN 6,3 (63). 10. Skid bar No16. 11. Drainage connection DN504 RN 0,1(1,0). 12. Product outlet DN65; RN6,3 (63 ). |
Structural description and operation principle
The heater is a tank, installed on mount frame and closed by heat-insulating panels; fuel preparation cabinet is mounted in one of them. Fire box equipped with electric spark burners and product coil are located in a tank. Heater is equipped with ladder, access platform and automation system. Tank is filled with intermediate heat carrier at operational location.
Technological process of oil heating is carried out as follows: from field system oil is transferred through valve to product coil of heater, is heated by intermediate heat carrier and then it is leaded out of heater through a valve.
Gas for burner feeding is obtained from field system and through tap valve flows to a coil where it is heated and transferred to fuel preparation line. After purification and reduction fuel gas is transferred to pilot and main burners, is bunt in fire box giving heat to intermediate heat.
Cooled combustion products are dumped from heater fire box to atmosphere by means of exhaust stack.
- To prevent freezing of intermediate heat carrier if heater stops in cold weather. Installation of electric heater is allowed.
- Fuel preparation cabinet is for location of devices for purging, reduction and control of fuel supply to burner devices.
- Devices are mounted to heat insulated cabinet which is made with insulated panel. During operation, heater cabinet is heated by hot wall of vessel.
Automation system PPT-0,2G / Zh
Automation system is for automatic control, regulation of technological processes included into line oil heater (remote ignition of burners, oil heating process regulation, switching on of working and alarm signaling, automatic protection of heater at deviation from norm of controlled parameters). System is not intended for operation in explosion hazard areas and areas with deleterious substance in air.
Automation system provides:
- Local visual inspection of basic parameters of technological process.
- Automatic regulation of pressure of fuel supplied to burners, product heating temperature.
- Automatic ignition of pilot and main burners with side pre-ventilation of fire box chamber by natural draft. Automatic stopping and blockage of heater launching program with sound and light signaling at deviation from defined values of main technological parameters:
– reduction of fuel gas pressure lower than permitted value after control valve;
– rise of fuel gas pressure higher than permitted value after control valve;
– pressure rise of heated product at the inlet to heater higher than 6,2 MPa;
– level reduction of intermediate heat carrier;
– temperature rise of intermediate heat carrier in heater higher than 95°Ñ;
– flame out of main burners in heater normal operation mode;
– flare lift of pilot burner during ignition;
– derangement of flare control channel;
– electric power shut off. - Working back signaling with the following parameters:
– supply voltage;
– ignition program provision;
– presence of flame of pilot and main burners;
System has two types of design:
- cabinet (design Sh)– secondary units are situated in heat insulated cabinet with heating, cabinet is located outdoors in immediate neighborhood of heater (in non-explosive area);
- wall-mounted – secondary units have to be situated in closed heated non-explosive facility with ambient temperature +5...+25°Ñ.
