It is suitable for the transformation of heat transfer and energy-saving technologies such as ethylene cracking furnaces, various oil refining tube furnaces and high pressure boilers. 

According to the Prandtl's boundary layer theory, when the fluid flows in the furnace tube of the radiant section of the cracking furnace, there are flow boundary layers and temperature boundary layers near the tube wall. The thermal resistance of the boundary layer is large, and the heat transfer efficiency of the cracking furnace tube is significantly reduced. At the same time, due to the existence of the boundary layer, the coking rate of the furnace tube increases and the operation period of the cracking furnace is shortened.

After the twisted sheet tube section is installed in the furnace tube of the radiant section of the cracking furnace, the flow form of the fluid in the tube changes from a plug flow to a swirling flow, which forms a strong scouring effect on the inner wall of the furnace tube, greatly reduces the thickness of the boundary layer, and increases the furnace tube in the radiant section. The overall heat transfer coefficient reduces the temperature of the furnace tube wall, reduces the coking rate, prolongs the operation period of the cracking furnace, and reduces the energy consumption.

2.3. Technical indicators

(1) The temperature of the furnace tube wall in the radiation section of the cracking furnace drops by more than 20 °C;

(2) The cracking furnace cycle is extended by more than 50%;

(3) Fuel consumption decreased by about 0.5%. 

4. Technical features

(1) Strengthen the heat transfer, and increase the heat transfer efficiency of the furnace tube by 30%;

(2) Reduce the thermal stress by more than 60%, improve the stability of the twisted sheet tube at high temperature, and prolong the service life of the furnace tube;

(3) Reduce the coking rate and reduce the probability of furnace tube blockage caused by coke layer falling off.

HEXIN Machinery produces various OEM wear and corrosion resistant components for the cement, lime, coal, shot blast machines,and iron Ore industries.
The castings HEXIN made generally are made from special irons and manganese steels, which are critically used in the sectiors of cement manufacturing,coal mining (surface and underground), copper smelting,crushers direct reduction of iron (DRI)
Iron ore manufacturing,Lime manufacturing. All the castings manufactured at HEXIN go through strict quality checks at all stages before being supplied to customers.
 

Tel.： 0086-532-6777 5336    Fax.： 0086-532-8898 7192

skype: zhishuai.liu    Email： info@hexinmachinery.com

Office address: Rm 1402-1403, Excellence Bldg, No.128 Yanji Rd, CBD,Shibei Dist, Qingdao, Shangdong 266000, China

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