SRQ Air Heater

Working Principle
For thermal oil heaters, heat is generated and transmitted by electric heating elements immersed in thermal oil. Using thermal oil as the medium and a circulation pump, the thermal oil is forced to circulate in liquid phase, transferring heat to one or more heat-using devices. After the heat is unloaded by the heat-using devices, the oil returns to the heater through the circulation pump, absorbs heat again, and transfers it to the heat-using devices. This cycle repeats, achieving continuous heat transfer, raising the temperature of the heated object to meet the process requirements. 

Features

1. Low pressure, high temperature, safe, efficient, and energy-saving.
2. Equipped with comprehensive operation control and safety monitoring devices, capable of precise control. Explosion-proof grade can reach Class C.

Application Fields

Petroleum and chemical industry: polymerization, condensation, distillation, melting, dehydration, forced insulation.
Oil and fat industry: fatty acid distillation, oil decomposition, concentration, esterification, vacuum deodorization and other reactor temperature control, reactor heating.
Synthetic fiber industry: polymerization, melting, spinning, stretching, drying.
Textile printing and dyeing: heat setting roller heating, drying room heating, thermal dyeing.
Nonwoven industry: nonwoven fabric.
Feed industry: drying.
Plastic and rubber industry: hot pressing, calendering, extrusion, vulcanization molding.
Paper industry: drying, corrugated paper processing.
Wood industry: plywood and fiberboard press molding, laminate heating, hot press plate heating, oil press temperature control, wood drying.
Building materials industry: gypsum board drying, asphalt heating, concrete component curing.
Machinery industry: painting, printing drying.
Food industry: oven heating, jacketed kettle heating.
Air conditioning industry: industrial plants and civil building heating.
Road construction industry: asphalt melting, insulation.
Pharmaceutical industry: drying.
Light industry: production of ink, laundry detergent.
Electroplating industry: zinc plating, chrome plating.
Printing industry: dyeing temperature control, drying.

Heating Power Calculation

1. The design and calculation of electric heating play an important role in electric heating systems. This chapter briefly introduces some calculations and designs in typical applications. For further study, please refer to relevant manuals. The design and calculation of electric heating are usually carried out in the following three parts:
1. Calculate the power required to heat from the initial state to the set temperature within the specified time.
2. Calculate the power required in actual operation while maintaining the medium temperature constant.
3. Select the heater model and quantity. The total power takes the maximum of the above two powers and considers a factor of 1.2.
Formula:
1. Power required for initial heating Kw=(C1M1△T+C2M2△T)/863/H+P/2
P: heat dissipation of the container at final temperature, unit: kW
H: time required to heat from initial temperature to final temperature, unit: hour
M1, M2: mass of container and medium respectively, unit: kg
C1, C2: specific heat of container and medium respectively, unit: kcal/(kg℃)
△T: difference between final temperature and initial temperature, unit: ℃.
2. Power required to maintain medium temperature: Kw=C2M3△T/863+P
M3: mass of medium added per hour, unit: kg/hour.
2. For convenience, this chapter provides some quick calculation formulas:
1. Power required for heating static water or oil (ignoring container heat loss) Kw=CM△T/863/H
C: specific heat kcal/(kg.℃)
M: mass kg △T
H: time: hour.
2. Power required for heating flowing water or oil (ignoring container heat loss) Kw=CF△T/14
C: specific heat kcal/(kg.℃)
M: flow rate kg/min △
T: temperature difference ℃.
3. Channel air heating (atmospheric pressure) Kw=F△T/40
M: flow rate m3/min
△T: temperature difference ℃
40: coefficient kW.min/(m3/min)
Vout=Vin(Tout+273)/(Tin+273)
Vin, Vout: channel inlet and outlet flow velocity
Tin, Tout: channel inlet and outlet temperature ℃.