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Post Requirements
Post Requirements
Product information
Boiling is a common operation process in industrial production. Boiling intensification can recover low-temperature heat sources and improve energy utilization efficiency; save project investment; high critical heat load improves the operational stability of heat transfer equipment; and solves the bottleneck problem of space constraints in equipment transformation. .
1. Strengthen heat transfer mechanism
Through mechanical processing or porous surface treatment, the vaporization core on the heat transfer surface is increased, the frequency of bubble detachment is increased, the accumulation of steam film on the heat transfer surface is prevented, the boiling thermal resistance is reduced, and the boiling heat transfer is enhanced. Influencing factors include: medium characteristics, flow state, heat transfer surface material, heat transfer surface roughness, surface superheat, etc.
2. Core components
1) T-shaped groove tube (GEWA-T)
Processing method: mechanical processing
Strengthening mechanism: The groove outside the tube can generate a large number of vaporization cores, accelerate the generation and bursting frequency of bubbles, destroy the boundary layer between the fluid and the heat exchange tube wall; increase the effective heat transfer area of the heat exchange tube, resulting in an increase in heat transfer , steam drum production increased.
Heat transfer efficiency: The heat transfer coefficient of boiling outside the tube can be increased to more than 1.6~2.0 compared with that of the bare tube; at the same heat flux density, the heat transfer temperature difference of the T-shaped fin tube to achieve boiling is only 1/5~1/ of that of the bare tube 2.
Suitable working conditions: medium is relatively clean, no solid particles, no colloid and other boiling and vaporization situations outside the tube.
2) Surface Porous Tube
Processing methods: high temperature sintering, flame spraying, brazing, electroplating, mechanical processing, chemical corrosion, etc.
Strengthening mechanism: The inner and outer surfaces are processed to form a metal porous layer, which provides a large number of capillary holes, provides a large number of vaporization cores for boiling heat transfer, accelerates the generation and collapse frequency of bubbles, and destroys the boundary layer between the fluid and the wall of the heat exchange tube.
Heat transfer efficiency: The external boiling heat transfer coefficient of the tube can be increased to more than 3 to 10 times compared to the light tube; for the same heat transfer temperature difference, the total heat transfer coefficient is 1.5 to 2.0 times that of the light tube; at the same heat flux density, the surface porous tube The heat transfer temperature difference to achieve boiling is only 1/5 to 1/2 of that of a bare tube.
Suitable working conditions: Especially suitable for alkanes, olefins, alcohols, Freon and other media, such as: propane dehydrogenation unit, ethylene unit, gas separation, alkylation, MTBE, light hydrocarbon recovery and other bottom reboilers, ethylene glycol Alcohol device multi-effect evaporator, etc.
3. Performance advantages
High heat transfer coefficient: boiling heat transfer coefficient is 2 to 10 times that of bare tube;
Small heat transfer temperature difference: The heat transfer temperature difference is only 1/5 to 1/2 of that of light tubes, and low-temperature heat sources can be recovered to reduce energy intensity;
Not easy to scale: has self-cleaning effect;
High critical heat load: The critical heat load is 1.5 to 2.0 times higher than that of light tubes, which improves the operational stability of heat transfer equipment;
The heat exchange area is small: about 30 to 50% of that of the light tube;
The overall weight of the equipment is light: about 30 to 50% of that of light pipes, saving equipment investment.
Comparison of effectiveness of deheptanizer bottom reboiler in a chemical plant
Project Light tube heat transfer solution Enhanced heat transfer solution Comparison results
Number of equipment/unit 1 1 /
Pressure drop (shell side)/kPa 5 5 /
Total heat transfer coefficient/[w/（㎡·k）] 475 1009 increased by 112%
Heat exchange area/㎡ 728 345 reduced by 53%
Total equipment weight/t 24 11 reduced by 54%
4. Application fields
In actual industrial applications, heat transfer can be enhanced simultaneously on one or both sides. In industrial devices such as oil refining, chemicals, energy, and environment, there are heat exchange situations where gas-liquid phase changes occur, such as medium boiling, vaporization, evaporation and other process operations. Units and equipment mainly include reboilers, reboilers, evaporators, carburetors, steam generators, waste heat boilers, etc. Boiling enhancement technology is particularly suitable for heat transfer situations where the temperature difference between hot and cold is small.
5. Main achievements
Serial number device heat exchanger
1 Phenol acetone unit: upper reboiler of benzene tower, cumene tower steam generator, cumene tower reboiler, etc.
2 Heavy oil catalytic thermal cracking unit: propylene tower reboiler, desorption tower bottom reboiler, stable tower bottom reboiler, etc.
3 Gas separation device: depropanizer tower top reboiler, refined propylene tower reboiler, etc.
4 Disproportionation unit reformed oil fractionation tower No. 2 reboiler, A8 stripping tower reboiler, extracted liquid tower No. 1 reboiler, extracted liquid tower No. 2 reboiler, p-xylene overhead steam generator, second Toluene tower reboiler, benzene-toluene tower reboiler
5 Heavy oil catalytic cracking unit: desorption tower intermediate reboiler, desorption tower bottom reboiler, stable tower bottom reboiler, etc.
6 C3/C4 separation device: depropanizer bottom reboiler, deisobutanizer bottom reboiler, etc.
7 Alkylation unit, deisobutanizer tower, reboiler, etc.
8 LPG unit naphtha separation tower bottom steam reboiler, naphtha separation tower bottom reboiler, stable tower bottom steam reboiler, stable tower bottom reboiler
9 EO/EG device, two-effect reboiler, three-effect reboiler
10 DMC device: one-tower reboiler, four-tower reboiler, five-tower reboiler, etc.
11 Ethylene glycol unit T4A tower condensation/steam generator, T4B tower condensation/steam generator, T5 tower condensation/steam generator, T6 tower condensation/steam generator, T7 tower condensation/steam generator
12 Aromatic hydrocarbons device
Disproportionation stripper reboiler, benzene-toluene tower reboiler, benzene-toluene tower middle section reboiler, reformate oil fractionation tower No. 1 reboiler, reformate oil fractionation tower No. 2 reboiler, A8 stripping Tower No. 1 reboiler, No. 1 extracted liquid tower reboiler, No. 2 extracted liquid tower reboiler
13 Methanol comprehensive utilization device Methanol recovery tower reboiler, methanol degreasing tower reboiler, ethanol recovery tower reboiler, ethanol refining tower reboiler, ethanol delight tower reboiler
6. After-sales service
Arrange instructors with experience in working with similar equipment to be responsible for on-site guidance on installation, start-up and transportation, and technical training. During equipment trial operation, professional technicians are sent to the site to provide technical support and on-site services. After the completion of the project, the buyer will be provided with permanent technical support, free technical consulting services and corresponding technical solutions. Provide solution support and on-site services for technical problems encountered during use and maintenance.
| Parameter Name | Value Range |
| Heat transfer coefficient | The boiling heat transfer coefficient is 2 to 10 times that of the bare tube |
| Minimum heat transfer temperature difference | The minimum heat transfer temperature difference is only 1/5 to 1/2 of that of the light tube |
| Fouling coefficient | About 1/10~1/2 of light pipe |
| Critical heat load | About 1.5 to 2 times that of light pipe |
| Heat exchange area | About 30~50% of light pipe |
| Equipment weight | About 30~50% of light pipe |
| Covered area | About 30~50% of light pipe |
