Hollow fibre heat-exchange device and method

A heat exchanger and fiber technology, applied in the field of hollow fiber heat exchangers, can solve the problems of low heat transfer coefficient and heat exchange efficiency, easy corrosion of metal heat exchangers, large inner and outer diameters and thicknesses, etc. Low cost and good salt tolerance

Active Publication Date: 2008-01-16
TIANJIN MOKELI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, under normal circumstances, the heat transfer coefficient of polymer materials is about 100-300 times lower than that of metal materials in metal heat exchangers.
Although the plastic tube heat exchanger currently used in the market overcomes the shortcoming of the metal heat exchanger being easy to corrode, its heat transfer coefficient and heat exchange efficiency are small due to its large internal and external diameter and thickness.

Method used

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  • Hollow fibre heat-exchange device and method
  • Hollow fibre heat-exchange device and method
  • Hollow fibre heat-exchange device and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Hollow fiber: polyvinylidene fluoride, inner diameter 600 μm (micron), thickness 60 μm (micron), effective length 25 cm (centimeter).

[0053] Module: Parallel convection structure (as shown in Figure 1), 500 hollow fibers, filling density 0.43; module shell is made of polypropylene.

[0054] Operating condition 1: inside the hollow fiber: tap water, inlet temperature 25°C, linear flow velocity 4120cm / min; outside the hollow fiber: tap water, linear flow velocity 1860cm / min.

[0055] Results: When the inlet temperature of tap water outside the hollow fiber is 60°C, the total heat transfer coefficient is 1300watts / m 2 -K; when the inlet temperature is 90℃, the total heat transfer coefficient is 1452watts / m 2 -K

[0056] Operating condition 2: inside the hollow fiber: tap water, inlet temperature 24°C, linear flow velocity 4220cm / min; outside the hollow fiber: 3.5% NaCl brine, inlet temperature 90°C.

[0057] Results: When the linear flow rate of brine outside the holl...

Embodiment 2

[0061] Hollow fiber: poly-4-methyl-1-pentene, inner diameter 425 μm (micrometer), thickness 50 μm (micrometer), effective length 20 cm (centimeter).

[0062] Components: cross-flow structure (as shown in Figure 2), 800 hollow fibers, filling density 0.36; hollow porous tube and component shell are made of polytetrafluoroethylene.

[0063] Operating condition 1: inside the hollow fiber: tap water, inlet temperature 33°C, linear flow rate 3520cm / min; outside the hollow fiber: 3% NaCl brine, inlet temperature 90°C.

[0064] Results: When the gap flow velocity of brine outside the hollow fiber is 120cm / min, the total heat transfer coefficient is 1250watts / m 2 -K; When the interstitial velocity of brine is 230cm / min, the total heat transfer coefficient is 1736watts / m 2 -K.

[0065]Operating condition 2: Inside the hollow fiber: water vapor, inlet temperature 115°C, 1 atm, linear flow rate 60cm / min (converted to the linear flow rate of water); outside the hollow fiber: 3% NaCl bri...

Embodiment 3

[0070] Hollow fiber: polypropylene, inner diameter 500μm (micrometer), thickness 70μm (micrometer), effective length 30cm (centimeter).

[0071] Components: cross-flow structure (as shown in Figure 3), 3000 hollow fibers, packing density 0.55; the hollow porous tube and component shell are made of polypropylene.

[0072] Operating conditions: inside the hollow fiber: seawater, inlet temperature 25°C, linear velocity 4440cm / min; outside the hollow fiber: seawater, inlet temperature 80°C.

[0073] Results: When the interstitial velocity of seawater outside the hollow fiber is 150cm / min, the total heat transfer coefficient is 1450watts / m 2 -K; when the interstitial velocity of seawater is 250cm / min, the total heat transfer coefficient is 1767watts / m 2 -K.

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Abstract

The invention relates to a hollow fiber heat exchanger, which comprises hollow fiber, a component enclosure, and a flow rate distribution system. Structurally, the hollow fiber heat exchanger has parallel counter current and cross current two basis modes. In the components of different modes of heat exchanger, the hollow fiber is parallelly and uniformly arranged in the enclosure of component, the two ends of the hollow fiber is fixed in the component enclosure by binder, and the two ends of the component enclosure are respectively connected with a tail cap with fluid inlet / outlet port. The inventive heat exchanger is suitable for heat exchange between gas, steam and liquid system, and has the advantages of high overall heat transfer coefficient, salinity tolerance, acid resistance, alkali resistance, low volume, light weight, easy production, low production cost, and broad application range.

Description

technical field [0001] The invention relates to a heat exchange device, in particular to a hollow fiber heat exchanger. Background technique [0002] Most of the liquid-liquid, liquid-gas, gas-gas, liquid-vapor, and gas-vapor heat exchange devices currently used in industry are made of metal. The advantage is that the metal materials used generally have high heat transfer coefficient and high temperature resistance. The disadvantage is that most metals have poor corrosion resistance, large equipment and expensive manufacturing costs. In comparison, polymer materials have certain advantages, such as: good corrosion resistance, easy processing, light weight (about 4-5 times lighter than metal) and cheap price. However, in general, the heat transfer coefficient of polymer materials is about 100-300 times lower than that of metal materials in metal heat exchangers. Although the plastic tube heat exchanger currently used in the market overcomes the shortcoming of the metal heat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F28F21/06
Inventor 侯爱平
Owner TIANJIN MOKELI TECH
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