보유기술
Belt dryer type BT
Characteristic features
Efficient air distribution due to direct-coupled and frequency-controlled multi-vent radial fans
Modular concept that can be easily extended
Low heat and electricity consumption thanks to perfectly matched components
Large doors for easy maintenance
Enclosed design allows for exterior installation at temperatures as low as -40 °C (insulated dryer tunnel)
Optimal product distribution due to double distribution screws
Product-turning device for consistent fi nal moisture content and energy-effi cient product ventilation
Top-down ventilation
- 1 : Maintenance access
- 2 : Feeding station
- 3 : Product
- 4 : Turning device
- 5 : Discharge screw
- 6 : Belt cleaning system (dry)
- 7 : Heat exchanger
- 8 : Fan for belt cleaning system
- 9 : Belt cleaning system (wet)
- 10 : Web belt
- 11 : Belt alignment
- 12 : Fresh air intake
- 13 : Fresh air
- 14 : Heat supply
- 15 : Drying air
- 16 : Exhaust air
- 17 : Exhaust air fan
Belt dryer type BTU with air recirculation for heat recovery
Characteristic features
Reduced exhaust air volume
Reduced emission mass fl ows
Reduced specifi c thermal energy consumption
Large doors for easy maintenance
Enclosed design allows for exterior installation at temperatures as low as -40 °C (insulated dryer tunnel)
Optimal product distribution due to double distribution screw
Product-turning device for consistent fi nal moisture content and energy-effi cient product ventilation
Top-down ventilation
- 1 : Maintenance access
- 2 : Feeding station
- 3 : Product
- 4 : Turning device
- 5 : Discharge screw
- 6 : Belt cleaning system (dry)
- 7 : Heat exchanger
- 8 : Fan for belt cleaning system
- 9 : Belt cleaning system (wet)
- 10 : Web belt
- 11 : Belt alignment
- 12 : Fresh air intake
- 13 : Fresh air
- 14 : Heat supply
- 15 : Drying air
- 16 : Exhaust air
- 17 : Exhaust air fan
- 17 : Circulating air
Belt dryer type BTU RecuDry® with air recirculation for heat recovery and condensation
Characteristic features
Conventional drying technology separated into two drying areas:
1. CONDENSATION MODULE:
Latent energy is used to pre-heat the fresh air
Maximum drying effi ciency due to the majority of the energy utilized being recovered with an air-to-air heat exchanger
Energy savings of 35–55 %, depending on the net drying area
Low exhaust air volumes and emissions
Retrofi tting option for existing systems with the RecuDry® system
- 1 : Fresh air
- 2 : Pre-heated fresh air
- 3 : Drying air
- 4 : Exhaust air
- 5 : Recu air
- 6 : Condensed Recu air
- 7 : Drying air Recu
2. RECU MODULE:
Optimal saturation using circulation and reheating
Use of this energy-rich air in the condensation module
RecuDry® Advanced design without reheating
Belt dryer type BTU RecuDry®with air recirculation for heat recovery and condensation
Functionality of the condensate treatment
Belt filter with neutralisation unit
Serves to clean and treat continuously produced condensate from the condensation modules as well as contaminated wash water from the cleaning unit
Addition of caustic soda for neutralisation
Excess is discharged via waste water pipe
Treated condensate is used to clean the heat recovery system
- 1 : Condensate inlet
- 2 : Belt filter
- 3 : Condensate outlet
- 4 : Condensate collecting basin
Energy saving compared to other belt dryers
Exemplary illustration of energy saving
Comparison of a drying system’s energy demand in a wood-pelleting plant based on a heat supply with 90 °C hot water:
Compared to the stela BT standard, stela BTU RecuDry® yields energy savings of 35 % during summer and 40 % during winter months, depending on the outside temperature.
Energy savings of up to 55 % can be achieved with the stela RecuDry® Advanced System by further increasing the drying area.
- stela Standard drying system compared with stela BTU RecuDry®and stela BTU RecuDry® Advanced.
Belt dryer type BTL
Characteristic features
Cost-eff ective drying system in the lower and medium output ranges
Modular concept that can be easily extended
Top-down ventilation
Optimal product distribution due to double distribution screws
Product-turning device for consistent fi nal moisture content and energy-effi cient product ventilation
Indirect drying
Use fi nned pipe heat exchangers
For hot water up to 130℃
For hot water from cogeneration or fl ue gas condensation
For saturated steam up to 15 bar
Plate heat exchangers can be used for special media (geothermal energy, thermal oil)
Direct drying
With hot air > 120℃
The raw gas temperature is homogenised with fresh air in a mixing chamber
For example, brick cooling air is used prior to dust extraction in cement plant
Low Temperature Belt Dryer BTU RecuDry®
Advantages
RecuDry® 시스템은 기존 건조 기술을 두 가지 건조 영역으로 나눕니다.
Recu 모듈과 응축 모듈.
Recu 모듈에서는 순환과 재가열을 통해 건조 공기가 최적으로 포화됩니다. 이 고에너지 순환 공기의 일부는 응축 모듈로 향합니다. 포함된(주로 잠재 에너지) 에너지는 응축 모듈을 위한 신선한 공기를 예열합니다. 공기 대 공기 열 교환기를 사용하면 적용된 에너지의 대부분을 회수할 수 있으므로 매우 효율적인 건조 공정.
시스템의 특별한 이점:
건조 표면에 따라 35 – 55%의 에너지 절약
배기 공기 흐름 및 배출 감소
기존 건조 플랜트를 RecuDry® 시스템으로 업그레이드 가능성
System
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Recu module -
Condensation module
Energy saving
위에는 펠릿 공장 내 벨트 건조 공장의 예시적인 에너지 수요가 나와 있습니다(90°C의 온수를 이용한 열 공급).
빨간색 선은 표준 건조 시설의 열 수요를 나타냅니다. RecuDry® 시스템(녹색 선)을 사용하면 주변 온도에 따라 여름에는 35%, 겨울에는 40%를 절약할 수 있습니다. 응축 모듈에서 예열된 공기의 재가열 감소와 건조 표면 증가로 인해 RecuDry® Advanced 시스템(밝은 녹색 선)을 사용하면 에너지 절감량이 최대 55%에 도달할 수 있습니다.
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Energy saving 35 – 55 %