Industrial dryers are core laundry equipment in laundry plants. Their drying efficiency directly determines the delivery speed. What factors slow down the drying process? This article will explain this issue from three aspects: equipment, garments, and environment.
Equipment
- Heat exchange efficiency
A heat exchanger is an important heating component. It provides clean hot air for dryers. Heating performance is directly determined by its heat exchange efficiency and quality. The heat exchanger used in a common 100 kg steam-heated dryer can withstand the steam pressure up to 6 bar. However, Kingstar’s heat exchanger can withstand pressure up to 10 bar. It provides stable hot air and a longer service life.
- Load ratio & spin speed
A Larger inner drum volume makes textiles tumble more smoothly. Hot air may not penetrate the entangled textiles. “Dry outside but damp inside” easily occurs. According to the standard, the load ratio of an industrial dryer should not be lower than 1:18. However, the ratio of a Kingstar 100 kg dryer reaches 1:20. This allows garments to spread in a larger space. Hot air circulation is smoother. Drying efficiency is naturally higher.
- Thermal insulation performance
A dryer generates hot air through a heater. Hot air entering the drum heats textiles to remove moisture. Poor thermal insulation performance leads to heat loss. Energy consumption rises and drying time prolongs. A Kingstar 100 kg dryer wraps the outer cylinder with 3 mm thick wool felt insulation. It accelerates heating and maintains a high temperature inside.
- Airflow volume & air intake/exhaust
A blower is a key part of dryers. If airflow volume matches the heat, a higher volume improves drying speed. The blower power of a 100 kg steam-heated dryer is 1.5–3 kW. But a Kingstar 100 kg smart dryer uses a 5.5 kW blower. It has a large airflow volume and fast heating performance.
Besides, the design of air vents is also important. Each dryer should exhaust air separately. If it is connected to the total pipe, each outlet should be equipped with a backflow baffle plate. The pipeline bend should be smooth. Maintain the same air exhaust direction to reduce air resistance. A smooth air exhaust system is essential to stable and efficient drying performance.
Garments
- Load capacity
Load capacity directly affects the total moisture content of garments. It also affects whether garments can fully spread in the drum. Less load means less moisture. So garments can be dried faster. They can fully unfold in the drum with fast evaporation. However, less load triggers low heat efficiency. Lots of 100 kg dryers do not match with 100 kg industrial washers. After washing, garments are not dried in a batch. Kingstar 100 kg industrial washers completely match with 100 kg dryers. Garments can be dried in a single batch. Pay attention not to overload.
- Moisture rate after extraction
Different fabrics have different water absorbency. After extraction, more residual moisture requires more heat for drying. Therefore, the extraction rate of industrial washers is vital. A high extraction rate enables less drying pressure.
Steam Pressure & Environment
- Steam pressure
High steam pressure accelerates heating. Insufficient steam pressure reduces the heating speed and even the entire heating efficiency.
- Environment temperature
For every 1℃ increase, drying efficiency improves by about 1%. In laundry plants, the temperature difference between summer and winter often exceeds 20℃. So the drying efficiency is higher in summer. This reduces the steam.
- Environment humidity
Humidity has a big difference in the drying efficiency. High-humidity air significantly reduces evaporation moisture from garments. Avoid placing ironers or washers producing much moisture near dryers. Otherwise, dryers may intake damp air to reduce the operating efficiency. Put dryers away from the high-humidity machines or use physical isolation methods.
- Steam pipeline length & boiler location
Long steam pipelines lead to more heat loss in the process. When steam reaches the dryers, its temperature and pressure drop. The drying time becomes longer. If the boiler is far away from the laundry, the drying efficiency also declines.
Conclusion
Excessive long drying time is caused by multiple factors: insufficient heating power, small drum volume, poor thermal insulation performance, blocked air exhaust, improper load volume, insufficient extraction, improper environment temperature and humidity, and steam pipeline damage.
When purchasing industrial dryers, focus on the following points:
– Heat exchanger quality
– Load ratio
– Thermal insulation design
– Blower power and air exhaust solutions
– Select professional equipment to avoid long-term efficiency loss caused by design flaws.
According to the above suggestions, laundry plants can quickly find the problems and take targeted measures.
Q&A
Q1: Does a Kingstar 100 kg dryer support gas heating?
A1: Yes.
Q2: How many programs can a Kingstar 100 kg dryer store?
A2: It can store 99 programs.
Q3: What is the inner drum material of a Kingstar 100 kg dryer?
A3: 304 stainless steel.
