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真空耙式干燥机的气密性试验!

2019-05-23 来源:http://www.zhongyanjixie.com 发布人:admin 浏览量:
  真空耙式枯燥具有构造简单,操作便当,运用周期长,性能稳定牢靠,蒸汽耗量小,适用性能强,产质量量好,特别适用于不耐高温、易燃、调温下易氧化的膏状物料的枯燥,该机经用户长期运用证明是一良好的枯燥设备。
  Vacuum rake drying has the advantages of simple structure, convenient operation, long operation period, stable performance, small steam consumption, strong applicability and good quality. It is especially suitable for the dryness of paste materials which are not resistant to high temperature, flammable and oxidizable under temperature regulation. It has been proved to be a good drying equipment by long-term use by users.
  真空耙式枯燥机是一种新颖卧式间歇式真空枯燥设备,湿物料经传导蒸发,带有刮板搅拌器不时肃清热面上的物料,并在容器内推移构成循环流,水份蒸发后由真空泵抽出。真空耙式枯燥机,在化学工业中的有机半废品和燃料枯燥操作中用得较多。
  Vacuum rake dryer is a novel horizontal intermittent vacuum drying equipment. The wet material is evaporated by conduction, and the material on the hot surface is cleaned up by scraper mixer from time to time. The circulating flow is formed by pushing in the container. After evaporation, the water is pumped out by vacuum pump. Vacuum rake dryer is widely used in the dry operation of organic semi-waste and fuel in chemical industry.
  真空耙式枯燥机安装用蒸汽夹套间接加热物料,并在高真空下排气,因而特别顺应不耐高温、在高温下易于氧化的物料或枯燥时容易产生粉末的物料(如各种燃料),以及枯燥过程中扫除的蒸汽或溶剂必需回收的物料枯燥作业。真空耙式枯燥机中被枯燥物料含水量或溶剂量高到达90%,而低的只要15%。被枯燥物料有浆状、膏状的、粒状的、粉状的,也能够是纤维状的。这些物料枯燥后的含水率普通到达0.1%,以至0.05%。
  The steam jacket used for installation of vacuum rake dryer indirectly heats materials and exhausts them under high vacuum, so it is especially suitable for the dry operation of materials which are not resistant to high temperature, easy to oxidize at high temperature or which are prone to produce powder when they are dry (such as various fuels), and materials which must be recovered from steam or solvent swept away during the drying process. The moisture content or solvent content of the dry material in the vacuum rake dryer can reach up to 90%, while the lowest is only 15%. Dry materials can be pasty, pasty, granular, powdery or fibrous. The moisture content of these materials usually reaches 0.1% or even 0.05% after drying.
  被枯燥物料从壳体上方正中间参加,在不时转动的耙齿的搅拌下,物料与壳体壁接触时,外表不时更新,被枯燥物料遭到蒸汽间接加热,而使物料水分气化,气化的水分由真空泵及时抽走,该机可同时采用夹层与耙齿同时加热方式,传热面积更大,热效率高,使其取得更高的枯燥效率。由于操作真空度较高,被枯燥物料外表水蒸气压力远大于枯燥机壳体内蒸发空间的水蒸气压力,从而有利于被枯燥物料内部水分和外表水分的排出,有利于被枯燥物料的水分子运动,到达枯燥目的。
  Participated by the dry material from the middle of the upper shell, stirred by the rotating rake teeth from time to time, when the material contacts with the shell wall, the appearance is updated from time to time, and the dry material is heated indirectly by steam, so that the moisture of the material is gasified, and the moisture of the gasification is pumped out in time. This machine can simultaneously use the heating mode of sandwich and rake teeth, which has larger heat transfer area and higher thermal efficiency. Achieve higher boring efficiency. Because of the high operating vacuum, the water vapor pressure on the surface of the dried material is much higher than that in the evaporation space of the dryer shell, which is conducive to the drainage of the internal and external moisture of the dried material and the movement of the water molecules of the dried material to achieve the purpose of dryness.
真空烘干机厂家
  气密性实验主要是检验容器的各联接部位能否有走漏现象.介质毒性水平为极度、高度危害或设计上不允许有微量走漏的压力容器,必需停止气密性实验。
  The air tightness test is mainly to check whether there is leakage in the connecting parts of the container. The toxicity level of the medium is extreme, highly harmful or the pressure vessel with no trace leakage in design must stop the air tightness test.
  压力容器应按以下请求停止气密性实验:
  The pressure vessel shall stop the air tightness test according to the following request:
  (1)气密性实验应在液压实验合格后停止.对设计请求作气压实验的压力容器,气密性实验可与气压实验同时停止,实验压力应为气压实验的压力。
  (1) The air tightness test should be stopped after the hydraulic test is qualified. For the pressure vessel which is required to do the air pressure test, the air tightness test can be stopped at the same time as the air pressure test, and the experimental pressure should be the pressure of the air pressure test.
  (2)碳素钢和低合金钢制成的压力容器,其实验用气体的温度应不低于5℃,其它资料制成的压力容器按设计图样规则。
  (2) Pressure vessels made of carbon steel and low alloy steel shall have gas temperatures not less than 5 C. Pressure vessels made of other materials shall follow the design rules.
  (3)气密性实验所用气体,应为枯燥、清洁的空气、氮气或其他惰性气体。
  (3) The gases used in the air tightness test shall be dry, clean air, nitrogen or other inert gases.
  (4)停止气密性实验时,平安附件应装置齐全。
  (4) When the air tightness test is stopped, the safety accessories shall be fully equipped.
  (5)实验时压力应迟缓上升,到达规则实验压力后保压10分钟,然后降至设计压力,对一切焊缝和衔接部位涂刷肥皂水停止检查,以无走漏为合格.如有走漏,修补后重新停止液压实验和气密性实验。
  (5) The pressure should rise slowly during the experiment, hold for 10 minutes after reaching the regular experimental pressure, and then drop to the design pressure. All welds and joints should be brushed with soapy water to stop checking. If there is any leakage, stop the hydraulic test and air tightness test again after repair.
  气密性实验与气压实验是不一样的。首先,它们的目的不同,气密性实验是检验压力容器的紧密性,气压实验是检验压力容器的耐压强度.其次实验压力不同,气密性实验压力为容器的设计压力,气压实验压力为设计压力的1.15倍。
  The air tightness experiment is different from the air pressure experiment. First of all, their purposes are different. The tightness of pressure vessel is tested by air tightness experiment, and the compressive strength of pressure vessel is tested by air pressure experiment. Secondly, the pressure of air tightness experiment is 1.15 times of the design pressure of vessel and the pressure of air pressure experiment is 1.15 times of the design pressure.
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