THERMAL OIL HEATER

Thermal Oil Heaters
·
Thermal Oil Boilers
·
Hot Oil Units

AB&CO · TT BOILERS are a well-known Danish thermal oil heater manufacturer, who have specialised in small and medium size customised heaters and boilers.

INTRODUCTION

TT BOILERS Thermal Oil Heaters type VTO (also called Thermal Oil Boilers or Hot Oil Units) are developed and designed especially for "heavy duty" operations where no compromise on quality are accepted and where low purchase price are not the key words

They are made in first class material and components and without any compromise on quality. The pressure part are designed as standard up to 40 bar pressure although operation pressure might between 3 - 10 barg.

The heaters for thermal oil (hot oil) are delivered complete and fully equipped units with all armatures, instrumentations and safety features.

Oil fired, gas fired, dual fuel and electrical heated. Horizontal and vertical types. Up to 10 barg working pressure. Capacities in standard design up to 5000 kW.

WHY USING OIL AS THERMAL OIL ?

Water and steam are typically used as heat carriers in heating systems. But at high temperatures, water and steam requires a corresponding high operating pressure. In industrial heating systems a high temperature level is often a great advantage, and establishing this with water and steam can be very controversial and expensive.

In thermal oil heaters a special oil are used instead as the heat carrier, operating at atmospheric pressure up to 300°C. Comparing to water and steam, it would require a pressure of 85 bar to obtain this temperature. There are several advantages by using thermal oil compare to e.g. steam systems. The most obvious are:

• High temperatures up to 300°C at atmospheric pressure
• Optional temperature level set-points
• No equipment for pre-treatment of boiler feed water
• No heat loss due to hot condensate and flash steam
• No risk of corrosion and no risk of freezing damages.
• Low maintenance costs
• Quiet in operation (no steam stroke and flash steam noise)
• Easy to operate ( does not require a steam boiler certified staff)

EXTENT OF DELIVERY

VTO thermal oil heaters can be delivered in horizontal design (with low height), or in vertical design (occupying limited floor space).

See the sketches below.

The heater units are delivered insulated with stainless steel cover sheets and complete equipped with burner, armatures, instrumentation, safeties and a control panel - and with full documentation including necessary certificates.

CONSTRUCTION

The heaters are made with coils of seamless tubes. The thermal fluid is heated during the flow through the tubes. The heat is transferred to the oil as radiant heat in the combustion chamber, where the inner cylindrical tube coil and a flat tube coil forms the chamber wall and the bottom respectively. Consequently refractory concrete is avoided. The combustion gasses are hereafter cooled in the outer convection part, as the gasses pass the space gab between the two tube coils. The thermal design ensures a modest volume of the thermal fluid relative to the size of the heater, and allows unlimited thermal expansion due to the high fluid temperature. The heater and the thermal fluid system in whole are constructed and equipped according DIN 4754. Pressure vessels are made according AD-Merkblätter (and corresponding ratified EN norms).

All VTO thermal oil heaters are carefully checked, controlled and function tested prior to dispatch from the workshop.

 

BURNERS

As standard the heaters are provided by international recognized and only high quality burner brands - for natural gas, light fuel oil, heavy fuel oil and combinations (dual fuel). Demands for special burner designs can be meet and adapted in the heater design - for instance burners for combustion of bio-gas and other low caloric gasses.

Complete Skidmounted System
Electrical heated

Container Solutions I
Closed type

Container Solutions II
Open type

TECHNICAL DATA

SPECIAL DESIGNS

Beside the standard execution, the VTO heaters can be delivered in e.g. following variations:

• Electrical heated, including EX-design if required

• Material in stainless steel

• Smaller complete systems as skid-mounted unit

• Build in a container.

THERMAL OIL SYSTEM SOLUTIONS

A correct and safe system design is very important for high temperature systems. This can be ensured by using AB&CO · TT BOILERS as the contractor for building up the whole system. The engineers of AB&CO · TT BOILERS have designed, and been in charge of, several hot oil solutions world-wide.

Complete hot oil heating systems with heaters, heat exchangers, tanks, pumps, armatures, instrumentations and piping can be delivered as package solutions and as skidmounted units - individually designed according DIN4754.

 

EXHAUST GAS COOLERS - ECONOMIZERS

Utilize heat in flue gas in exhaust gas boilers (economizers). AB&CO · TT BOILERS offers the complete systems of high efficiencies.

It is recommended to use a non fouling, high temperature resistant thermal fluid for the applications like AB&CO NF. This fluid is available at our stock in Copenhagen.

Why thermal oil instead of steam ?
Read more about this important issue.

Type VTO

[kW]

Heat
Capacity
[Mcal/h]

A

[mm]

B

[mm]

C

[mm]

D

[mm]

E

[mm]

F

[mm]

Weight
Empty
[kg]

Weight
Service
[kg]

On request