Oil heaters PNPT-0.3 (Zh), PNPT-0.63 (Zh), PNPT-1.6 (Zh), PNPT-3.87 (Zh)

Oil heaters with intermediate heating agent PNPT-0.3 (Zh), PNPT-0.63 (Zh), PNPT-1.6 (Zh), PNPT-3.87 (Zh) are designed for heating oil and oil emulsion during transportation and processing. Climatic performance - "U(moderate)" and "HL(cold)"

Operation principle, components

Oil heaters consist of the following main parts:

·         Heating block;

·         The fuel treatment block;

·         Control and safety system.

In the operating position the maintanence platform is attached to the heater.

The process of oil heating:

·         Oil from the production network through the valve enters the heater coil, is heated with the intermediate heating agent (water, antifreeze "40" or "65") and comes out from the heater;

·         Fuel is burned in the heater furnace, giving heat to the intermediate heating agent;

·         Cooled combustion products are removed from the heater furnace into the atmosphere through a chimney.

The heating block is designed to transfer heat from combustion products to the heated product.

Features of oil heaters

The coil and the furnace are equipped with slings, installed along rollers in the vessel of the heating unit, the combustion chamber and the coil are freely rolled out which makes the PNPT heaters maximally accessible for inspection and maintenance.

Automation

Possible to supply the heater with various control systems.
The PNPT oil heater is normally completed with the BUK-5PUR automatic control system, as per special order - with SA-PNG.M-I on the basis of the Direct Logic DL-05 controller.
Control systems provide the ability to exchange information with the upper control level and remote control using various industrial protocols (MODBUS RTU, etc.), RS-232 and RS-485 interfaces which makes it easy to integrate the heater into the process control system.


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parameter

PNPT-0.3 (Zh)

PNPT-0.63

PNPT-1.6 (Zh)

PNPT-3.87 (Zh)

Nominal capacity, kW (gcal / h)

350 (0,3)

730 (0.63)

1860 (1.6)

4500 (3.87)

Performance range (δt, 65 ... 20 °C)

176…573

368...1195

937...3044

368...1195

Estimated efficiency factor, %

85

85

85

85

Pressure inside the coil, MPa:

- working pressure, max

- design

- test hydralic pressure


6.3

6.3

8.2


6.3

6.3

8.2


6.3

6.3

8.2


6.3

6.3

8.2

Pressure drop in the coil, MPa, max

0.2

0.55

0.55

0.55

Temperature, ° C:

- at the inlet to the heater, min

5

5-50

5-50

5-50

- of product heating

70

70

70

70

- design of coil wall 

100

-

-

-

- of heating the intermediate heating agent, not more than

95

95

95

95

- the average of coldest five-day period, not less than

-40

-40

-40

-40

- absolute minimum air, not lower than

-50

-50

-50

-50

Intermediate heating agent

fresh water

fresh water

fresh water

fresh water

Heated fluid - oil, oil emulsion,

formation water, gas with content, mole%, max:

0.01

1.0

0.01

1.0

0.01

1.0

0.01

1.0

fuel

Natural or associated gas,

Liquid fuel (oil, mazut, diesel fuel)

Natural or associated gas,

Liquid fuel (oil, mazut, diesel fuel)

Natural or associated gas,

Liquid fuel (oil, mazut, diesel fuel)

Natural or associated gas,

Liquid fuel (oil, mazut, diesel fuel)

Fuel gas characteristics:

       

- hydrogen sulphide content, wt %, max

0.002

0.002

0.002

0.002

 pressure at the inlet to the fuel preparation unit, MPa, within

0.1...0.6

0.3...1.2

0.3...1.2

0.3...1.2

- nominal value at the burner, MPa

0.03

0.07...0.15

0.07...0.15

0.07...0.15

- consumption, m/h, max

40

100

180

593

Fuel oil characteristics:

       

- density, kg/m3, max

887

887

887

887

- viscosity, cSt

20

20

20

20

- hydrogen sulphide H2S, mole %, max 2

0.01

0.01

0.01

0.01

- carbon dioxide CO2, mole %, max 2

1

1

1

1

- operating temperature, °C, max

50

50

50

50

- inlet pressure at the heater, MPa, within

4.0...6.2

4.0...6.2

4.0...6.2

4.0...6.2

- pressure before burner, MPa, max

3.5

3.5

3.5

3.5

- fuel oil consumption, kg/h, within

10...50

100

200

400

Overall dimensions (length x width x height), m, max

5600x2765x8240

10.9х2.5х9.2

11700х4800х7400

16.69х4.786х7.25

Mass of heater without heating agent, kg, max

5000

13030

28300

49152

Reliability indicators:

- average life before overhaul, years

- average service life, years

3.5

10

     
 





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