Automated oil-heating furnace PT-4-64J

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Purpose
The furnace is designed for heating of oils and oil emulsions in the process of field processing and stabilizing.

Technical Data

Heat power, MW (Gcal/h)	4,65 (4,0)
Capacity, tons/hour	110-180
Operation pressure, MPa, max.	6,4
Medium to be heated: oil, emulsified oil with concentration of sulphur/wax/water, %, max.	1,25/2/20
Density at 20 °С, kg/m3, max.	0,85
Fuel	heated oil
Heated product temperature at inlet, °С, min.	5-10
Heated product temperature at outlet °С	90
Efficiency, %, min.	80
Fuel consumption, kg/hour	470
Dimensions (length x width x height), m, max.	10,5x3,2x3,5
Mass, tons, max.	19

Structural description and operation principle:

• The furnace is a modular structure consisting of:
  – heat-exchanger;
  – convective section;
  – burner;
  – stack;
  – air duct;
  – service platform;
  – fences;
  – ladder;
  – skid-mounted and free-standing stack connected to the furnace through a fume duct.

• The furnace is of gas-proof design, it operates at boosting of max. 50 kg/m².

• The oil to be heated is supplied to the bottom collector of the furnace, then it passes through ribbed pipes of gas line and through diaphragm panels of firebox. On this way, oil is heated, taking heat of fuel combustion products

Heat energy, obtained from fuel combustion, is transmitted by the way of radiation to heating surfaces, i.e. diaphragm panels and convective flues.

Combustion products are moved inside the furnace due to excessive pressure (boosting) in firebox, that is built by blow fan of burner.

Excessive pressure setting is kept by the help of choke, mounted in front of flue, forwarding combustion products to the stack.

Combustion process is controlled by the way of keeping set temperature of oil at furnace outlet due to change of fuel and airflows to the burner.

This process is provided by two interconnected systems: the interlocked control system for outlet oil temperature and followers of airflow and fuel consumption.

The interlocked control system operates regulating elements (valves), measuring fuel flow to a burner.

The interlocked control system is functioning using two signals: oil temperature signal at outlet and combustion prod-ucts (fumes) temperature signal. This control system is highly responsive.

Follower (proportion control) affects on actuating mechanism that in turn regulates flow area of axial throttling blow fan of burner and proportionate fuel consumption and airflow for combustion.

Follower is functioning using two signals: fuel consumption signal and air pressure difference signal that increases reliability of the system.

© 2008 "The Generation Industrial Group".