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Horizontal Tube-Type Primary Gas Cooler: Reliable Cooling for Coke Oven Gas Systems
1. Overview of the Horizontal Gas Cooler
The Horizontal Tube-Type Primary Gas Cooler is a shell-and-tube type heat exchanger designed to reduce the temperature of high-temperature raw coke oven gas from approximately 700–800°C to below 120°C. It achieves this through indirect heat exchange between the hot gas and cooling water flowing inside the tubes.
This type of cooler is known for its robust performance, high heat transfer efficiency, and ease of maintenance, making it an essential component in traditional COG cleaning systems.
2. Working Principle
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Gas Flow
The raw gas enters the shell side of the cooler and flows across a horizontal bundle of cooling tubes. -
Water Circulation
Cooling water flows inside the tubes in a counter-flow or cross-flow arrangement, absorbing heat from the gas through the tube walls. -
Temperature Drop
As the gas passes through the shell side, its temperature decreases rapidly, promoting the condensation of part of the tar vapors and water vapor. -
Gas Outlet
The cooled gas exits the unit and proceeds to the electrostatic tar precipitator or other downstream purification equipment.
3. Structural Features
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Shell and Tube Design: Proven and stable structure, with hot gas in the shell and water inside the tubes
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Removable Tube Bundles: Allow for periodic maintenance and cleaning
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Tube Sheets and Baffles: Improve heat exchange efficiency and ensure stable gas flow paths
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Support Frames: Secure installation and minimal vibration
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Optional Accessories: Expansion joints, drain outlets, inspection ports
4. Key Advantages
| Advantage | Description |
|---|---|
| High Cooling Efficiency | Large heat exchange area ensures rapid gas temperature reduction |
| Long Service Life | Durable materials and mature design for long-term operation |
| Ease of Maintenance | Removable tube bundle design simplifies cleaning and repairs |
| Stable Operation | Well-balanced flow paths and minimal pressure drop |
| Cost-Effective | Lower initial investment and maintenance cost compared to some vertical designs |
| Customizable | Tube size, length, material, and configuration can be tailored to site conditions |
5. Application Scenarios
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Coke oven gas primary cooling systems in traditional coking plants
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Gas cooling units for low-pressure, horizontal layout systems
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Ideal for retrofit projects with space constraints or height limits
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Industries requiring indirect gas-liquid heat exchange with low risk of water entrainment
6. Typical Technical Parameters
| Parameter | Typical Range |
|---|---|
| Gas Flow Rate | 5,000–100,000 Nm³/h |
| Gas Inlet Temperature | 650–800°C |
| Gas Outlet Temperature | 80–120°C |
| Cooling Water Flow | Based on heat load and temperature differential |
| Tube Material | Carbon steel, stainless steel, alloy steel (optional) |
7. Conclusion
The Horizontal Tube-Type Primary Gas Cooler continues to serve as a reliable and economical choice for raw gas cooling in the coking industry. Its robust structure, efficient heat exchange capability, and user-friendly maintenance make it an attractive option for both new projects and system upgrades.
Whether you're operating a large-scale coke production line or upgrading an existing plant, our engineering team can provide tailor-made designs, material selection guidance, and installation support to help you maximize operational efficiency.