Biomass pellet mold temperature machine and small boiler: differences and connections

Biomass pellet mold temperature machine and small boiler: differences and connections

Conclusion: Biomass pellet mold thermometers are not strictly equivalent to small boilers. They are two types of thermal energy devices that have both similarities and significant differences.

1、 Basic Definition and Working Principle

1. Biomass pellet mold temperature machine

Definition: A heating device that uses biomass particles (such as sawdust, rice husks, etc.) as fuel and thermal oil as the heat transfer medium

Working principle: Burning biomass particles generates heat energy, which is then transported to the heat consuming equipment (such as molds) through a circulation pump. After releasing heat, the heat transfer oil returns to the mold temperature machine for reheating, forming a cycle

Temperature control range: usually between 90-310 ℃, with an accuracy of ± 0.5 ℃

2. Small boiler

Definition: The "Regulations on Safety Supervision of Small and Atmospheric Hot Water Boilers" specify that small boilers include: small steam water dual-use boilers (evaporation capacity ≤ 0.5 tons/hour, pressure ≤ 0.04MPa), small hot water boilers (outlet pressure ≤ 0.1MPa), and small steam boilers (water volume ≤ 50L and pressure ≤ 0.7MPa)

Working principle: Fuel combustion (or electric heating) heats water into steam or hot water, which is directly supplied to the heating equipment through pipelines

2、 Comparison of core differences

Comparison: Biomass pellet mold temperature machine, small boiler, heat transfer medium, heat transfer oil (liquid phase circulation), water (producing steam or hot water), working pressure, normal pressure or low pressure (usually<0.1MPa), some types have higher pressure (up to 0.7MPa), temperature range can reach up to 310 ℃ (far beyond ordinary boilers), steam boiler usually ≤ 180 ℃, hot water boiler ≤ 100 ℃, high temperature control accuracy (± 0.5 ℃), specially designed for precision temperature control, low, mainly used for heating rather than precise temperature control, mainly used for industrial scenes such as mold heating, drying, vulcanization, etc. that require precise temperature control. Scene design features: compact, efficient, energy-saving (about 30% energy-saving compared to boilers), large volume, and some require dedicated personnel to operate

3、 Regulatory classification and regulatory definition

Key distinguishing point: rated power

According to the "Technical Regulations for Boiler Safety" (TSG 11-2020), it is clearly stipulated that:

When the power of the mold temperature machine is ≥ 100kW (0.1MW), it is recognized as an "organic heat carrier boiler" and belongs to special equipment, which needs to be executed in accordance with boiler supervision regulations (manufacturing license, installation supervision, regular inspection, etc.)

When the power of the mold temperature machine is less than 100kW, it belongs to general industrial equipment and is not included in the scope of special equipment supervision

Most commercial biomass pellet molding machines have a power range of 200000 to 1 million kcal/h (approximately 23-116 kW), with some small models having a power below 100 kW. Therefore, some belong to the category of boilers, while others do not, depending on their rated power parameters.

4、 Why is it easy to confuse?

Fuel similarity: Both can use fuels such as biomass pellets

Appearance similarity: Some mold temperature machines are designed to be compact and resemble small boilers in appearance

Industry habit: Small thermal oil furnaces are often referred to as "mold temperature machines" in the market, blurring the boundaries

Functional overlap: Both can provide thermal energy and can replace each other in certain application scenarios

V. Summary

Biomass pellet mold temperature machine is not a simple equivalent of a small boiler, they are two different design concepts of thermal energy equipment. Although under specific conditions (power ≥ 100kW), some mold temperature machines can be classified as "organic heat carrier boilers", there are significant differences between the two in terms of core functions, technical characteristics, and application fields.

Suggestion for selection:

If precise temperature control is required (such as plastic molding, rubber vulcanization), a biomass pellet mold temperature machine should be selected

If a large amount of steam or hot water is needed (such as heating or steaming), small boilers should be considered

Before purchasing, it is necessary to confirm the equipment power and regulatory classification to comply with relevant regulatory requirements