vapour-phase Dowtherm heating plant

Electric HTF Heaters

Steam System Design
Batch Heating Vessels & Calandria

Thermal Fluid Heating and Hot Oil Systems

Steam Systems

Saturated steam is a precision isothermal process heating medium for manufacturing operations, works utilities and site resources. It enables high rates of energy transference over long distances without need of mechanical intervention. Steam may be generated from any type of fuel, in any quantities, and within any chosen continuum of rate, temperature and pressure. It may be superheated beyond its natural saturation temperature to provide local high energy supplies for power, chemical and production operations. Steam system design is well-supported by a knowledgeable and ethical supplier basis, providing education, advice and off-site management services for process heating applications.

Thermal Fluid Heating

While Dove Thermal began life as steam engineers, we have designed and built several skid-mounted and installed process heating systems incorporating our highly successful shell-and-tube electric HTF heaters for synthetic fluids and hot oil systems. At temperatures above 340 degrees or so, vapour pressures of even the most tolerant synthetic fluids tend to rise above atmospheric, so that - without careful management - the design and operating conditions of thermal fluid heating systems can affect their useful working life. Their replacement cost should be offset against the water treatment and attendance requirements of steam plant, although the saturation pressures of steam at temperatures above 200 deg.C might appear to mark this as a working limit for general use. While thermal fluid heating and hot oil heating systems can be worked either side of atmospheric pressure, pressurised installations allowing operation above their normal saturation temperatures are more complex than for steam.

No thermodynamic pressure is induced during the heating of a thermal fluid while its vapour pressure remains below atmospheric, and engineering costs are much-reduced if systems are to operate only under gravity head. Generally speaking, electric calorifiers for thermal fluid and hot oil heating fall within SEP classification of the PED and are not CE marked. As they do not require ventilation for combustion air supply, electrically-fired and steam-heated calorifiers are suitable for installation in airconditioned spaces and clean room environments. We design, build and commission jacketed, calandria equipped and externally recirculated batch heating vessels for heating and tempering duty in chemical and food production processes. Direct firing, resistance or induction heating may be employed where liquid phase process heating systems are impracticable.

Please also refer to our specialist page at Liquid Phase Heating & Hot Oil Heating Plant

Examples of Dove Thermal Process Heating Systems and Equipment:

Trent 900 environmental test support systems for Rolls-Royce Aerospace

Steam system design for Eversmart Express, Fibracan, Tate & Lyle, et al.

Modular electric HTF heaters for International Automotive Components

Variable concentration batch heating vessels for Banner Chemicals

Vapour Phase Dowtherm A Heating Plant for Glaxo Smith Kline

Gas-fired baking oven heating module for Spooner-Vicars

Production line induction heating for Hughes Christensen

Thermal Oxidiser Recuperator for Stein Atkinson Stordy

Buffer storage process heating systems for HS Butyl

Rotary drying kiln for Vantage Waste Processing

Thermal fluid heating system for Tiflex Limited

Calandria hot oil systems for Cullum Detuners

Dove Thermal Engineering Limited, Uttoxeter, ST14 8QX

Telephone: 01889 569933