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Finned Tube

High Flux Tube

High flux tube can be classified into three groups: sintered high flux tube, sprayed high flux tube and machined high flux tube. Among them, sintered high flux tube is the most expensive for its complex processing method and high efficiency; machined high flux tube is applied to mediums with......
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High flux tube can be classified into three groups: sintered high flux tube, sprayed high flux tube and machined high flux tube. Among them, sintered high flux tube is the most expensive for its complex processing method and high efficiency; machined high flux tube is applied to mediums with high surface tension, its performance is in between; sprayed high flux tube is the cheapest for its easy process and Low efficiency.

On the one hand, high flux tube can reduce the steam demand. On the other hand, it can improve the heat transfer capability. In the large heat transfer system, because of the need of small temperature differences, the number of reboiler needed is very big. The use of high flux tube can reduce 3/4 the amount of reboiler, and temperature difference ΔT asks for only 5 ℃. Using high flux tube to replace traditional bare tube can eliminate heat transfer bottlenecks, meet the needs of larger heat load, and significantly increase production. At the same time, under the condition of keep the design efficiency, can reduce the cost.


Material and size of High Flux Tube

Material: nickel-copper alloy(C70600,B10), carbon steel(SA179,10#), aluminum alloy (3003), stainless steel(304L,316L)and so on.

Size: outer diameter 19、25、32mm,length 2000~14000 mm

Under normal condition, the middle of High flux tube is enhanced section. Both ends are smooth. It is easy to wear tubes and expansion joint. High flux tube can do OEM as customers’ need. Products are packaged with wooden boxes.

Applicable medium of high flux heat exchangers

Ethylene glycol, light olefin, refrigerant, liquid oxygen, liquid nitrogen.

Applications of high flux heat exchangers

High flux heat exchanger can be used in phase change equipment, such as, carburetor, evaporator, reboiler and condenser, etc.

Sprayed High Flux Tube

The coating on sprayed high flux tube is formed by spraying guns which melt and spray the compound of Ni-wrapped Al powder and pore-forming materials. This can only process the outside surface of high flux tube, which has only 50% of heat transfer efficiency of sintered high flux tube, 10% service life of sintered high flux tube. But it is easy to manufacture and much cheaper.

 

Name:high flux tube

Type:①OD vertical flutes/ ID sintered porous coating

②OD sintered porous coating /ID low fins

③ID sintered porous coating

④OD sintered porous coating

Spec.:OD 19mm/25mm/32mm,length 2000~14000 mm


Sintered high flux tube is a new product combining metal powder sintered method and machining technology. It can improve the heat transfer coefficient of the inside and outside tubes, thus it can significantly improve overall heat transfer coefficient of heat transfer tubes.


The current case-hardened products:

OD vertical flute/ ID sintered porous coating, OD sintered porous coating /ID low fins , ID sintered porous coating, OD sintered porous coating .


UOP High flux tube and heat exchanger

High flux tube is a new product combining sintered method and machining technology. They can improve heat transfer coefficient of the inside and outside tubes , thus they can significantly improve overall heat transfer coefficient of tubes. They solve the current problem that heat transfer coefficient increased only on one side of heat transfer enhancement, while the total heat transfer efficiency is still low. They greatly improve the efficiency of the heat transfer tubes and heat exchangers.

On the one hand, High flux tube can reduce the steam demand. On the other hand, it can improve the heat transfer capability. In a large heat transfer system, because of the need of small temperature differences, the number of reboilers needed is very large. The use of High flux tube can reduce 3/4 the amount of reboilers, and temperature difference needed for only 5 ℃. Using High flux tube to replace traditional bare tube we can eliminate heat transfer bottlenecks, meet the need of larger heat transfer load, and significantly increase production. At the same time, while keeping machine efficiency, it can reduce cost by using lower steam pressure.


The case-hardened products are as follows:

Sintered porous coating for the outer surface/low fins for the inner surface, Cannelure for the outer surface/ sintered porous coating for the inner surface, Sawtooth surface for the outer surface/ sintered porous coating for the inner surface, fins for the outer surface/ sintered porous coating for the inner surface.

1.1 Material and size of High flux tube

Material:Copper Alloy, carbon steel, Aluminum, and soon.

Size: external diameter 15~40mm,length 500~12000 mm

Under normal condition, the middle of High flux tube is strengthened section. Plane ends are smooth, so it is easy to wear and to be expanded. High flux tube can do OEM as customers’ need. Products are packed with wooden boxes.

1.2 Applicable medium of high flux heat exchangers

Ethylene glycol, diethylene glycol, ethylene trichloride, ethane, propylene, ethyl alcohol.

1.3 Applications of high flux heat exchangers

High flux heat exchanger can be used in phase change equipment, such as, carburetor, evaporator, condenser and reboiler, etc. To be specific, such as ethylene carburetor, the overhead condenser and reboiler of ethylene separation device , combination plant of ethylene glycol evaporation and aromatic, main condenser-evaporator of air separation unit. As well as the natural gas liquefaction, cryogenic refrigeration, air separation, and sea water desalination, etc.

(1)Oil refining and petrochemical installations

Such as overhead condenser and reboiler of ethylene separation device, ethylene carburetor, catalytic slurry oil evaporator, ethanol evaporator and ethylene glycol evaporator, etc. It can reduce more than 80% heat transfer area, and can also lower refrigerator horsepower. In the long-term operation process, porous surface with enhanced boiling heat transfer is very stable, and no coking or scaling phenomenon has occurred. At the same time it can greatly reduce heat medium consumption, so far as to lower the heat medium temperature.

(2)Natural gas purification and separation devices

For example, in the reboiler condensers of cryogenic air separation plant. On the one hand, it can reduce initial cost of evaporation - condensing (cooling) heat exchanger (cut down heat transfer surface); On the other hand, because of the small work temperature difference, it can reduce the power consumption.

(3)Sea water desalination and waste heat utilization

1.4 Analysis of high flux heat exchanger economy

To build a set of megaton ethylene equipment, the total investment is above 20 billion RMB commonly, according to history data, heat exchangers' cost accounting for about 30% of the total investment , the cost of heat exchangers in each large ethylene project will reach neally 7 billion RMB. But since China's energy use efficiency is only 34%, equivalent to that of developed countries 20 years ago, ten percent lower than them now. Developing a higher efficient heat exchanger in smaller temperature difference and less heat transfer surface can be the first step directly related to industrial energy saving development. Using High flux tube and high-efficiency heat exchangers are the most efficient, and also the most economical means to improve the use efficiency of energy.

At present the demand of High flux tube in China is increasing rapidly, in the ethylene industry and other fields, High flux tube and high-efficiency heat exchangers have broad application prospects, thus it has huge potential market demand. There are a lot of high efficient heat transfer tubes in the United States, Japan and Germany, but the technology is still a secret to China, so domestic ethylene industry was forced to use imported High flux tubes.

High flux tubes developed by our company can reduce heat transfer surface and the size (about 80%) of traditional heat exchangers, also can reduce the amount of heat exchangers in large projects and cut down the piping, control foundation construction and plane landed cost. By replacing tube bundle of heat exchangers in existing plant, the original head, shell, piping etc. can be used again.

 

COPPER NICKEL HIGH FLUX TUBES FOR HEAT EXCHANGER

C70600 Copper Nickel High Flux Tubes for heat exchanger

High Flux Tubes are capable of largely enhancing heat transfer efficiency in the nucleate boiling regime. A porous metal layer or matrix is bonded metallurgically to the heat-transfer surface. Saturated liquid is drawn into the layer by capillary action and vaporizes from the extremely large number of stable generation sites which exist in the structure. Boiling side heat transfer coefficients of 10-30 times that of bare tubes can be achieved, resulting in an overall heat transfer improvement of 2-4 times that of bare tubes. They exist another excellent feature that the tubes are not prone to fouling due to the extremely active boiling surface.

 

The use of High Flux tubes allows reduced exchanger surface area and/or lower utility consumption, resulting in substantial savings in capital and operating costs.

C70600 Copper Nickel High Flux Tubes for heat exchanger

 

High Flux Tubing are capable of largely enhancing heat transfer efficiency in the nucleate boiling regime. A porous metal layer or matrix is bonded metallurgically to the heat-transfer surface. Saturated liquid is drawn into the layer by capillary action and vaporizes from the extremely large number of stable generation sites which exist in the structure. Boiling side heat transfer coefficients of 10-30 times that of bare tubes can be achieved, resulting in an overall heat transfer improvement of 2-4 times that of bare tubes. They exist another excellent feature that the tubes are not prone to fouling due to the extremely active boiling surface.

 

The use of High Flux tubing allows reduced exchanger surface area and/or lower utility consumption, resulting in substantial savings in capital and operating costs. For large reboiler duties, the use of High Flux tubing can reduce the total number of exchanger shells required, resulting in not only reduced exchanger costs but savings in piping, controls, foundation, and plot plan space.

 

In retrofit situations, the use of High Flux tubes in existing exchanger shells can allow increased capacity and/or elimination of a new exchanger addition. Alternatively, the use of High Flux Tubes can allow the use of lower pressure steam at fixed capacity, reducing utility costs. In a revamp situation, the use of High Flux Tubes, as an alternative to a new exchanger, is particularly attractive due to conservation of plot space, minimum downtime, and short lead-times.

 

Stable boiling is achievable at low temperature differentials. This feature can be used minimize the Log Mean Temperature Difference (LMTD) of the heat exchanger to reduce utility consumption. This is particularly effective in heat pump applications by reducing the compressor demand.

 

High Flux Tubes can be either ID or OD coated for boiling on the tube side or shell side, and the non-coated side can be finned or fluted by extrusion process for additional heat transfer capacity.


Typical application:

Heat-pumped propylene/isobutene fractionators

Ammonia plant synthetic gas chilling applications.

Grassroots heavy aromatics separation,

Natural gas de-ethanizing


Sintering open surface porous high flux pipe and high flux exchanger standardization and serialization:

Application: widely used in petroleum, chemical, oil refining, fine chemical and industrial air conditioning and other industries.

Advantages: double strengthening heat transfer, in thermal efficiency is greatly improved, and at the same time, improve heat exchange equipment

 

performance of scale inhibitors.

Specification: diameter over 14mm for the outside surface, and over25mm for the inner side surface, the maximum length for one tube is 16000mm.

 

The two main kinds(Fixed tube-sheet and U type tube heat exchanger) high flux heat exchangers are broad used in CNPC, CPCC and CNOOC equipments.

ØHigh efficiency of the spiral baffle plate heat exchanger of standardization and serialization: widely used in petroleum, chemical, oil refining and chemical industry, etc

ØHigh efficiency spiral plate heat exchanger; Mainly used in the new energy system of biomass ethanol, in high thermal efficiency, can be cleaned.

Ølarge-scale and series  of film evaporator introduction: mainly used in chemical, pharmaceutical and other industries.

Ø Falling Film Evaporator Develop.

Ø Nuclear Waste Recovery System :used for nuclear power plant.

Ø Reactor sets: used for maleic anhydride, crylic acid, ethylene oxide, crude benzene hydrogenation, ethylene, methane chloride plants etc.


Hot Tags: high flux tube, China, suppliers, manufacturers, price
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