| specification(L) |
Actual capacity(L) |
Inner barrel size(mm) |
Dimensions(mm) |
Reducer model |
Motor power |
Stirring speed(n/min)
|
| 50 |
61 |
400 |
600 |
m3 |
0.6 |
60-80 |
| 100 |
120 |
500 |
700 |
m3 |
0.6 |
60-80 |
| 200 |
247 |
600 |
800 |
m4 |
1.6 |
60-80 |
| 300 |
355 |
700 |
900 |
m4 |
1.5 |
60-80 |
| 500 |
589 |
900 |
1100 |
m6 |
2.2 |
60-80 |
| 1000 |
1215 |
1200 |
1400 |
m8 |
4 |
60-80 |
| 2000 |
2244 |
1400 |
1600 |
m8 |
5.5 |
60-80 |
Structure
Main Components: Shell, tube bundle, tube sheet, head, baffle plate, support plate, connecting pipe, flange, etc.
Supplementary Instructions:
Expansion Joint: Used for fixed tube-sheet heat exchangers to compensate for the thermal stress caused by temperature differences.
Tube Bundle Arrangement: In addition to triangular and square arrangements, there is also a rotated square arrangement (enhances turbulence and improves heat transfer efficiency).
Working Principle
Fluid Distribution:
Corrosive, high-pressure, or easily fouling fluids usually flow through the tube side (facilitates material selection and cleaning).
Fluids with high viscosity or low flow rate are suitable for the shell side (baffle plates can enhance turbulence).
Process Selection: A multi-pass design (such as a two-pass) can increase the flow rate and heat transfer coefficient, but it will increase the pressure drop.
Classification and Application Scenarios
Type Advantages Disadvantages Application Scenarios
Fixed Tube-Sheet Simple structure, low cost An expansion joint is required when there is a large temperature difference Situations with small temperature differences and high pressures
Floating Head Can handle large temperature differences, and the tube bundle is easy to extract for cleaning Complex structure, high cost Scenarios with large temperature differences and frequent cleaning requirements
U-Tube Resistant to high temperature and pressure, good thermal compensation Difficult to mechanically clean the tube side High temperature and pressure, clean fluids
Packing Box Type Partially compensates for thermal stress, relatively simple structure Limited by pressure, and the seal is prone to failure Medium and low pressure, corrosive media
Additional Features
Advantages:
Compactness: Large heat transfer area per unit volume, but the pressure drop needs to be balanced.
Disadvantages:
Difficult to Clean: U-tubes rely on chemical cleaning, while floating head types can be mechanically cleaned.
Vibration Risk: High-speed fluids may induce vibration of the tube bundle, and anti-vibration plates need to be designed.
Application Examples
Petrochemical Industry: Crude oil preheating (crude oil flows through the shell side, and steam flows through the tube side).
Power Industry: Condensers (cooling water flows through the shell side, and exhaust steam flows through the tube side).
Pharmaceutical Industry: Cooling of reaction kettles (coolant flows through the tube side, and reaction liquid flows through the shell side).
Key Points for Selection and Design
Parameter Relationships:
Increasing the flow rate → Increasing the heat transfer coefficient, but also increasing the pressure drop; Increasing the temperature difference → Increasing the heat load.
Material Selection:
Titanium (resistant to seawater corrosion), Hastelloy (in strong acid environments), graphite (high thermal conductivity and corrosion resistance).
Standard Specifications: Refer to TEMA (Tubular Exchanger Manufacturers Association) and ASME standards.
Maintenance and Fault Handling
Inspection Contents:
Corrosion (pitting corrosion, stress corrosion), gasket aging, cracks in the tube sheet welds.
Cleaning Methods:
Mechanical Cleaning: High-pressure water guns (suitable for detachable tube bundles).
Chemical Cleaning: Acid cleaning or alkali cleaning (pay attention to material compatibility).
Leakage Handling: Plugging no more than 10% of the total number of tubes to avoid uneven heat distribution.
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