Finned Tube----Screw thread tube heat exchanger

Finned Tube----Screw thread tube heat exchanger

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Screw thread tube heat exchanger is a new energy-efficient heat transfer equipment  introduced  in recent years, which is designed to completely break through the traditional shell and tube heat exchanger design ideas, choose from materials to structure, shape size, etc. with the traditional shell and tube heat exchanger has a substantial change compared to a number of technical innovations so that heat from the exterior to the various aspects of performance significantly beyond the traditional shell and tube heat exchangers , heat exchanger has changed the traditional simple structure , bulky , rough shape , inefficiency features, is the traditional heat exchanger replacement products.

1. Screw thread tube heat exchanger technology advantages

At present, heat transfer equipment industry technology updates slower, longer product replacement cycle , the manufacturers have generally invested in R & D is low , the manufacturers of the product are mostly imitate each other , resulting in product homogeneity is more prominent.

Screw thread tube heat exchanger heat transfer coefficient from the most important feature of its ultra-high, generally 2-3 times that of conventional shell and tube heat exchanger , along with better energy efficiency , with the traditional shell and tube heat exchangers is compared to more than 10% energy saving .

Outside screw thread tube heat exchanger also changed the image of the traditional extensive heat exchanger shell from the cylinder to the flange , all made ​​of stainless steel material , the outer surface of the heat exchanger to make mirror polished , beautiful and greatly improved .

Screw thread tube heat exchanger advantage also comes from its size and weighs only a fraction of the traditional shell and tube heat exchanger , the installation process is no longer the need for complex tools and lifting equipment, labor to complete.

The heat resistance due to the larger tube is not suitable for low pressure steam source and water / water heat exchanger conditions.

2. Screw thread tube heat exchanger structure

Screw thread tube heat exchanger consists of two parts consisting of a core and a shell , the core is mainly composed of tubes , shell composed by the barrel and closed top , head down , each with two openings , with the head of an center opening angle of 90 ° , so that all involved in heat exchanger , no dead zone .

3. Screw thread tube heat exchanger applications

Screw thread tube heat exchanger with high efficiency heat transfer performance, steam - water heat exchanger excellent field performance , widely used in HVAC and domestic hot water side, while on the cryogenic unit also has outstanding performance in the chemical and pharmaceutical and achieved a wide range of applications .

4. Advantages of screw thread tube heat exchanger

( A ) high- thread spiral tube heat exchanger thermal efficiency , more energy ( steam ) savings :

Internal unique reverse winding, spiral coil structure to countercurrent heat exchanger , the steam is condensed in the tubes can be fully beam , without going through a secondary heat exchanger , it can save a lot of steam ;

(B ) screw thread tube heat exchanger is stainless steel welding , high temperature high pressure :

As the screw thread tube bundle heat exchanger tubes and all stainless steel casing , with a uniform coefficient of expansion , its highest pressure 1.6MPa, the maximum temperature of 400 ℃, not due to pressure and temperature instability caused by heat 's deformation ; without pressure reducer .

The general volume of heat exchanger is generally made ​​of carbon steel shell , copper tube . Because the material is not the same so different coefficients of expansion , with the expansion and contraction easily crack in the weld of the tube . Coupled with mostly floating coil type , coil constant vibration , more broken pipe . Cause great trouble for the post- overhaul. Another low volume heat exchanger pressure , high temperature and pressure reduction pressures need to install the device , not only the initial investment cost increases , while the steam temperature and pressure reduction device will heat wastage.

(C ) screw thread tube heat exchanger compact, easy to install , small footprint

Screw thread tube heat exchanger small, save infrastructure investment ; light weight, ease of installation , the device can be directly connected to the pipeline , reducing installation costs.

Common bulky volume heat exchanger , typically 10 times the spiral tube heat exchanger thread , a larger area ; install complex and require prefabricated foundation, higher installation costs.

(D ) screw thread tube heat exchanger long life :

The use of screw thread tube heat exchanger Owen (OWEN) turbulence buffeting frequency standards principles, using the smallest gap beam tubes designed to effectively eliminate the turbulence buffeting phenomenon , extending the service life of the heat exchanger , spiral ribbed tube heat exchanger design life of up to 40 years under normal conditions of use , quality problems exchanger 8 year free repair or replacement.

While The general volume of the heat exchanger can only use about five years.

(E ) screw thread tube heat exchanger fouling tendencies low , low maintenance costs

Screw thread tube heat exchanger unique internal structure , unique countercurrent heat exchange surface treatment technology and media on both sides , at the same time improving the overall heat transfer coefficient to ensure that the heat exchanger has a self-cleaning function , low fouling tendency . Also, to ensure the stability of the system , our company with a stainless steel heat balancer , can ensure that the temperature is stable. Even after long-term use of fouling phenomenon , we only use chemical cleaning methods to clean the heat exchanger , time-saving , labor-saving , low cost , good effect .

In contrast, volume heat exchanger requires periodic inspection , conduct a visual inspection at least annually , at least once every three years, internal and external inspection, maintenance workload, high maintenance costs. Especially when the tubes appear broken crack pipes and tubes , the tubes need to be drawn overhaul , which must provide space for a large overhaul tube out . Causing great inconvenience for the overhaul .

( Six ) screw thread tube heat exchanger can be adjusted according to actual usage temperature, and volumetric heat exchanger temperature not higher than the limit value terminal , otherwise it will accelerate the scaling, increase the maintenance workload.

( Seven ) screw thread tube heat exchanger energy saving and environmental protection:

Screw thread tube heat exchanger tube heat medium walk , walk refrigerant shell , cold pack to maintain the flow of heat exchanger itself is dry, does not affect the ambient air . Coupled with heat exchangers and heat balancers are made ​​of stainless steel sanitary grade high temperature sterilization regularly .

Volumetric heat exchanger is because both the water storage tank , and its warm, moist environment to create the conditions for microbial growth , easy to produce a large number of bacteria that can cause infection and inflammation , causing indoor secondary pollution, the threat of human health.