DW系列带式干燥-四川川大干燥科技工程有限责任公司.

 产品特点 PRODUCT FEATURES:

• 成批生产,连续式干燥;
• 用于脱水蔬菜、中药饮片等含水率高、而温度不允许高的物料尤为合适；
• 对脱水滤饼类的膏状物料，以适粒或制成棒状后亦可干燥；
• 该系列干燥机具有干燥速度快、蒸发强度高，产品质量好的优点。
• Continuous drying for batch production.
• For rod, granulate materials with better air permeability.
• Especially for those with high humidity, low permissible temperature like dewatering vegetables. Chinese medicine slices etc.
• Applicable for paste materials of dewatering residue in the form, of granulate or bar.
• The drier features high speed, high steam strength and high quality.

  工作原理 WORKING PRINCIPLE：

工作原理如图所示，料斗中的物料由加料器均匀铺在网带上，网带采用12-60

目不锈钢丝网，由传动装置拖动在干燥机内移动。干燥机由若干单元组成，每一单元热风独立循环，其中部分尾气由专门排湿风机4排出每一单元排出废气时均有调节阀控制。在上循环单元，循环风机5出来的风由侧面风道进入单元下腔。气流向上通过加热器7加热，经分配器6分配后，成喷射流吹向网带，穿过物料后进入上腔。干燥过程是热气流穿过物料层，定然成热量与质量的传递的过和。上腔由风管与风机入口相连，大部分气体循环经排湿管、调节阀、排湿风机排出。下循环单元中，循环风机出来的风先进入下腔。向下经换热器加热。穿过物料层进入下腔，下腔由侧风道及回风管与风机口相连。大部分气体循环，一部分排出。上、 下循环单元根据用户需要可灵活配备，单元数量也可根据需要选取。

   用于脱水蔬菜时，一般使用三台设备串联使用，形成初干段、中间段及终干段。在初干段中，由于物料含水量高，透气性故应采用较小的铺料厚度，较快的运行速度及较高的干燥温度。初干段中，干燥气体温度可达120⁰C以上。终干段内物料停留时间是初干段的3-6倍，铺料厚度是初干段的2-4倍。对于物料温度不超过600C的要求，可采用800C左右的干燥气体。采用多段组合能更好地发按带式干燥机的性能，且干燥更均匀。

    As showed in the drawing, materials inside the hopper is spread uniformly by the feeder onto the mesh belt made of 12-60 eye stainless steel and moved inside the drier by driving devices. Drier is composed by a few units in which hot air enters the lower chamber of the unit and the air flow is heated and distributed to mesh belt in the form of spraying flow before it enters upper chamber through the belt materials. Drying process is the duration of hot air flowing through material layer, where heat and quality is transmitted. Upper chamber is connected b air pipe with fan inlet, in which, most part of air circulates except those with low temperature and high humidity which is drained through humidity exhaust, circulated air enters upper chamber first, heated by exchanger when down-streams through material layer to the lower chamber which is connected with fan inlet by side air pipes and return air pipes, most part of air circulates with little be drained. Moreover, each unit can be completed freely according to user’s request.

    If used for dewatering vegetables, serial 3 sets is normally adopted to form initial, middle and final drying section, among which, initial section takes thinner spreading thickness, speedy running and higher drying temperature which can reach 120. hold time in the final section will be 3-6 time of initial one, spreading thickness will be 2-4 times, normally drying air around 80℃ is used for materials who require a temperature not over 60℃. All in all, multy-section composition will put the properties of belt drier into full play.