粉體行業在線展覽
粉體行業在線展覽
DW系列
直接聯系
四川川大干燥科技工程有限責任公司.
四川成都
面議
DW系列
15307
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產品特點 PRODUCT FEATURES:
工作原理 WORKING PRINCIPLE：
工作原理如圖所示，料斗中的物料由加料器均勻鋪在網帶上，網帶采用12-60
目不銹鋼絲網，由傳動裝置拖動在干燥機內移動。干燥機由若干單元組成，每一單元熱風獨立循環，其中部分尾氣由專門排濕風機4排出每一單元排出廢氣時均有調節閥控制。在上循環單元，循環風機5出來的風由側面風道進入單元下腔。氣流向上通過加熱器7加熱，經分配器6分配后，成噴射流吹向網帶，穿過物料后進入上腔。干燥過程是熱氣流穿過物料層，定然成熱量與質量的傳遞的過和。上腔由風管與風機入口相連，大部分氣體循環經排濕管、調節閥、排濕風機排出。下循環單元中，循環風機出來的風先進入下腔。向下經換熱器加熱。穿過物料層進入下腔，下腔由側風道及回風管與風機口相連。大部分氣體循環，一部分排出。上、 下循環單元根據用戶需要可靈活配備，單元數量也可根據需要選取。
用于脫水蔬菜時，一般使用三臺設備串聯使用，形成初干段、中間段及終干段。在初干段中，由于物料含水量高，透氣性故應采用較小的鋪料厚度，較快的運行速度及較高的干燥溫度。初干段中，干燥氣體溫度可達1200C以上。終干段內物料停留時間是初干段的3-6倍，鋪料厚度是初干段的2-4倍。對于物料溫度不超過600C的要求，可采用800C左右的干燥氣體。采用多段組合能更好地發按帶式干燥機的性能，且干燥更均勻。
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.
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