循环式加热器是通过强迫对流体的方式对流体进行加热的。即在加热器一头用泵把流体泵进加热器，经加热器后，在加热器一头流出，是一种通过泵强制循环的一种加热方式。

   Circulation heaters heat a liquid or a gas by forces convection, The fluid is pumbed in at one end of the hearter ,passes around the elements and discharge at the other end.

特点 Characteristics:

1. 体积小，功率大，循环式加热器内部主要采用浸入式加热器，*大功率达1MW。
   Compact size,big power,Circulation heater has immersion heater inside,Max power can be 1 MW.
2. 加热速度快，控温精度高，热效率高。
   Fast heating, high precision of tempt control and high thermal efficiency.
3. 应用范围宽，适应性强：循环式加热器可用于防爆或普通场合，它的防爆等级可达B级和C级，它的耐压可达20MPa 。
   Wide range of application, high adaptability. Circulation type heater can be used either in normal situation or in anti explosive situation. Its protection of explosion grade can reach B or C and its pressure endurance reaches 20 MPa .
4. 加热温度高：循环式加热器设计*高工作温度可达650℃。
   High heating temperature:circulation type heater is designed to have max empt of 650℃ .
5. 全自动化控制：通过循环式加热器控制系统设计，可方便实现出口温度、压力、流量等参数自动控制，并可与计算机联网，实现人机对话。
   Fully automatic control:by means of control system designing for the circulation heater it is easy to effect auto control of parameters like outlet tempt,pressure,and flow rate and connect it to computer network for man/machine conversation.
6. 寿命长，可靠性高：循环式加热器不同用途设计相应功率负荷，并采用多重保护，使得本加热器安全性和寿命大大增加。 Long working life,high reliability: circulation heater is designed to have its power load correspond to different applications and has multiple-fold protection,so that safety and working life of the heater is greatly enhanced.

典型应用场合 Typical applications area:

1. 各种水加热，包括民用盥洗室里的水加热及工业上工艺水的加热。
   Various kinds of water heating includeing bathroom water heating civilian life and process water heating for industrial purposes.
2. 碳氢化合物的加热，包括导热油、燃料油、沥青、石腊等等。
   The heating of hydrocarbon including heat conducting oil,fuel oil,tar,and paraffin.
3. 清洗机、融冰槽的加热，包括NaOH溶液及各种洗涤剂。
   Heating of cleaning machine and ice melting trough,including NaOH solution and all kinds of detergent.
4. 空气的加热，适用于一定压力下，一些粉末干燥、化工过程及喷射干燥。
   Heating of air,suited to drying up certain powder,chemical engineering process and jet drying under certain pressure.
5. 蒸气的加热。
   Heating of steam.

气体加热，包括H2，N2及其他气体。 Heating of gases,including H2,N2 and various kinds of inert gases.