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微热再生吸附式干燥机工作原理

来源:杭州优联超滤设备有限公司  日期:2019-09-11 11:08:56  点击:668  属于:行业动态
吸附式干燥机和冷冻式干燥机是现在市场上应用最广泛的干燥机。 吸附式干燥机主要通过干燥剂吸附特点来降低压缩空气中的水份,按吸附剂的再生方式来分类,主要分为无热再生、微热再生、鼓风热再生、压缩热再生4种。
吸附式干燥机和冷冻式干燥机是现在市场上应用最广泛的干燥机。
 
Adsorption dryer and freeze dryer are the most widely used dryers in the market.
 
吸附式干燥机主要通过干燥剂吸附特点来降低压缩空气中的水份,按吸附剂的再生方式来分类,主要分为无热再生、微热再生、鼓风热再生、压缩热再生4种。
 
Adsorptive dryer reduces moisture in compressed air mainly by adsorbing characteristics of desiccants. According to regeneration methods of adsorbents, it can be divided into four types: non-thermal regeneration, micro-thermal regeneration, blast thermal regeneration and compressed thermal regeneration.
 
优联超滤为大家介绍一下应用最多的微热再生吸附式干燥机的工作原理及其特点。
 
Ultrafiltration provides you with an introduction to the working principle and characteristics of the micro-thermal regenerative adsorption dryer, which is the most widely used.
 
工作原理:微热再生吸附式干燥机是根据变压吸附、再生循环的原理,利用自热进行吸附干燥。
 
Working Principle: The micro-heat regeneration adsorption dryer is based on the principle of pressure swing adsorption and regeneration cycle, using self-heating for adsorption drying.
 
压缩空气交替流经两个吸附塔,当其中一个吸附塔在高分压的状态下,干燥剂(如硅胶、铝胶、分子筛等)吸收大量的水分,而另一吸附塔则由再生气管道通入干燥的低压气体,解析干燥剂吸收的水分进行干燥剂的再生。
 
Compressed air flows through two adsorption towers alternately. When one of the adsorption towers is at high partial pressure, desiccants (such as silica gel, aluminium gel, molecular sieve, etc.) absorb a large amount of water, while the other adsorption tower passes through the regeneration gas pipeline to dry low-pressure gas, analysing the water absorbed by desiccants for desiccant regeneration.
 
它采用活性氧化铝或者分子筛为吸附剂,利用变温变压吸附原理,常温吸附时,空气中水分子的分压力大于吸附剂中水分子的分压力,水分子进入吸附剂内部,在吸附剂的表面冷凝成水,放出冷凝热,将此热量蓄于吸附塔的上部。
 
It uses activated alumina or molecular sieve as adsorbent, and uses the principle of variable temperature and pressure adsorption. When adsorbing at room temperature, the partial pressure of water molecule in air is greater than that of water molecule in adsorbent. Water molecule enters the adsorbent, condenses into water on the surface of adsorbent, releases condensation heat, and stores this heat on the adsorbent tower. Department.
 
再生时,一定量的干燥空气经加热器加热至180℃左右通过再生筒,使吸附剂的吸附能力大大降低,使吸附剂中的水分子逸出,同时蓄于吸附塔内的热量有助于节约加热器的功率。
 
During regeneration, a certain amount of dry air is heated by heater to 180 C through regeneration cylinder, which greatly reduces the adsorptive capacity of adsorbent, makes the water molecules in adsorbent escape, and at the same time, the heat stored in the adsorbent tower helps to save the power of the heater.
 
吸附剂经过吸附、再生、吸附循环使用,对生产提供源源不断的干燥压缩空气。
 
The adsorbent is adsorbed, regenerated and recycled to provide continuous dry compressed air for production.
 
工作流程:干燥机开机后,A塔吸附运行,B塔再生。
 
Work flow: After the dryer starts, tower A is adsorbed and tower B is regenerated.
 
在预先设定的时序控制下,切换阀1-A打开、1-B关闭,排放阀6-B打开、6-A关闭,湿空气进入A塔,干燥后的空气通过止回阀4-A排入下游管线;部分干燥压缩空气在压差的作用下通过孔板5流入再生气加热器8,被加热至设定温度并进入B塔内解吸潮湿的吸附剂,使吸附剂再生。
 
Under the pre-set timing control, the switching valve 1-A opens and 1-B closes, the discharge valve 6-B opens and 6-A closes, and the wet air enters tower A. The dried air is discharged into the downstream pipeline through check valve 4-A. Under the action of pressure difference, part of the dry compressed air flows into regenerative gas heater 8 through orifice plate 5 and is heated to the set temperature. The wet adsorbent is desorbed in tower B to regenerate the adsorbent.
 
潮湿的再生空气通过排放阀6-B和消声器7排入大气。这一再生阶段称为“加热阶段”。 加热再生持续一段时间后,出口再生空气温度达到设定值,再生气加热器就停止加热。未加热的再生干燥空气进入B塔内对吸附床层进行冷却,使其恢复至吸附时的温度,这一阶段称为“冷吹阶段”。
 
Moist regenerated air is discharged into the atmosphere through exhaust valve 6-B and muffler 7. This regeneration stage is called "heating stage". After heating regeneration for a period of time, the outlet regenerated air temperature reaches the set value, and the regenerated gas heater stops heating. Unheated regenerated dry air enters tower B to cool the adsorbent bed and restore it to the temperature at which it is adsorbed. This stage is called "cold blowing stage".
 
冷吹结束后,B塔进行“均压”,最后完成整个再生过程。微热再生吸干机的控制系统比无热再生干燥机复杂。除了控制相关阀门外,还需要根据再生温度控制加热器的运行。一般均采用采用PLC和相关的温控装置实现控制。
 
After the cold blowing, the pressure of tower B was equalized, and the whole regeneration process was completed. The control system of micro-heat regenerative dryer is more complex than that of non-heat regenerative dryer. In addition to controlling the relevant valves, the operation of the heater also needs to be controlled according to the regeneration temperature. Generally, PLC and related temperature control devices are used to realize the control.
 
 
 
以上是常见的双塔干燥机的工作原理,目前吸附式干燥机已经发展至模块干燥机和模芯干燥机,通过结构优化,使干燥效果和再生气耗得到了大幅度优化。
 
Above is the working principle of common two-tower dryer. At present, adsorption dryer has been developed to modular dryer and core dryer. Through structural optimization, the drying effect and regeneration gas consumption have been greatly optimized.