六合管家宝典

降膜多效真空泵是一类高效化多效化掉机械设备，其与升膜多效真空泵、刮粪式保护膜多效真空泵称做为保护膜多效真空泵。保护膜多效真空泵优缺点特别，在有机化工、工业及食品饮料生产相关行业内被很广应该用，以以达到透明液体浓缩咖啡的的。降膜多效真空泵的格局不过并不错综复杂，会简简单单看法为双面列管式板式热交换器器器内加一家布膜装置，是它与常见板式热交换器器器又有条个特别的对比分析，其壳程不变为受热射流，管程不变为被多效化掉废料。

The falling film evaporator is a kind of high efficiency evaporation equipment, which is called the film evaporator with the rising film evaporator and the scraper type thin film evaporator. Thin film evaporator has obvious advantages and is widely used in chemical industry, light industry and food processing industry to achieve the purpose of liquid concentration. The structure of falling film evaporator is not complicated, can be understood as a simple vertical tube for a cloth membrane device heater, heat exchanger and ordinary but it has an obvious difference, the shell is fixed to the heating fluid, Guan Cheng fixed evaporated material.

降膜化掉器管程所走货品全是以管顶渗入换导导导电管，运用自我重量沿管路璧向龌龊，在渗入换导导导电管事先，需历经布膜器布膜，因此渗入换导导导电管的期间会呈胶片状，在货品由上至下的步骤中含水量被化掉到处，因而以达到货品浓缩造成的为的，壳程若是是用水压缩空气冷凝剂采暖器或导电油采暖器，若安全使用水压缩空气则勤奋努力下出，若备选导电油则应自下而上。以此隐约可见，管路外材质去向不有一定全是顺流。

Falling film evaporator tube take materials are from the top of pipe in the heat exchanger tube, with its own gravity to the downstream along the tube wall in the heat exchanger tube before, after the cloth membrane cloth membrane, which enters the heat exchanger tube is thin, in the process of material from the top to the bottom water is evaporated sent out, so as to achieve the purpose of material concentration, the shell if it is heated by condensing steam heating or heat conducting oil, if the use of steam coming out under, if the selection of heat conducting oil should be bottom-up. Thus it can be seen that the flow direction of the medium and outside the tube is not always countercurrent.

但这并不非常重要，是考虑到管道内压差主要不便，不懂造成的水射流摄氏度因素不同，管道内有机溶剂摄氏度因素调整但是考虑到有机溶剂氨水浓度不同而造成的熔点提升(这也但是略显提升只不过)。 But this is not important, because the pressure inside the tube is basically unchanged, which will not cause the change of the fluid temperature. The change of medium temperature in the tube is due to the increase of boiling point due to the change of medium concentration, which is only a slight increase. 降膜蒸馏器缺点进行分析： (1)热交换管路原辅料逗留日期短，是不会损害热敏性原辅料有机化学经营性质； (2)热交换管口物料管理呈pe膜状且水流量快，蒸发掉热交换因子大； (3)压降基本上为0，管程废料地处卧式储罐室内环境，基本靠政治意识浮力沿管壁上从上到下作，可节约能源；(4)在管程废料靠政治意识浮力沿管壁上从上到下作，不以用风压差来进一步推动，，因此可选择使用低湿度； .(5)管程空间货品残留量愈来愈少； (6)管程物品供暖后表达为过流燃烧，但是换散热器接触面动态基本上不危害物品燃烧。降膜多效冷凝器优点和缺点分析一下： (1)设备挥发感觉与遍布器有会直接关系，对遍布器的设置生产制造装设让都极为高； (2)的机器安装规范规范耍求高，包括行为为铅直度规范规范耍求，猜测换散热器直径为9m，的机器铅直度则规范规范耍求≤6. 4mm； (3)需保护仪器换散热器外壁完完全全很湿但布膜厚薄又是不能太高，需对原辅料投料量和换散热器厚度展开至关精准的的定制换算才能够提供那样的需要； (4因设汁营造需求都很高致使产品购置成本低相对高； (5)而言易结渣或含混合物飘浮物的原辅料不能可用于用。

Analysis of the advantages of the falling film evaporator:

(1) change of the material in the heat pipe with short residence time, does not affect the chemical properties of heat sensitive materials;

(2) the material in the heat exchange tube is thin film and the flow velocity is fast, and the heat transfer coefficient is large.

(3) the pressure drop is almost 0, and the pipe material is in the atmospheric pressure environment. It can flow down along the inner wall of the pipe entirely, and it can save energy. (4) because the pipe material flows downward along the inner wall of the pipe itself instead of the pressure difference, the low temperature difference can be chosen.

(5) there is very little retention of space materials in the tube range;

(6) the tube material is heated by convection boiling, so the surface state of the heat transfer tube almost does not affect the boiling of the material. Shortcoming analysis of falling film evaporator:

(1) the effect of the evaporation of the equipment is directly related to the distributor, and the requirements for the design, manufacture and installation of the distributor are very high.

(2) the equipment installation requirements, mainly for the requirement of verticality, assuming the tube length is 9m, is less than 6. 4mm vertical equipment;

(3) it is necessary to ensure that the inner wall of the heat exchanger tube is completely wet, but the thickness of the film can not be too large. It is necessary to design and calculate the material feed quantity and the length of the heat exchanger tube accurately.

(4 because of the high requirements of design and manufacture, the cost of equipment procurement is very high;

(5) it is not applicable to materials that are easily fouled or containing solid suspension.