Finned Tube Heat Exchanger for Waste Heat Recovery System of Glass Fiber Factory

Glass fiber production lines release massive high-temperature flue gas containing glass dust, alkali vapor and slight corrosive components from melting furnaces, drawing furnaces and curing ovens. Our customized finned tube heat exchanger for glass fiber factory waste heat recovery system is specially developed to recycle waste heat from glass fiber exhaust. It transfers recovered heat to generate hot water or hot air for workshop heating, raw material preheating and curing process reuse, greatly cutting natural gas and coal consumption for glass manufacturers.

We adopt high-frequency welded finned tube structure, with optional SUS304 / SUS316L stainless steel to resist alkali corrosion and dust adhesion, solving the two core pain points of glass fiber flue gas: easy fouling and medium corrosion. It serves as the core heat exchange equipment of the whole glass factory waste heat recovery station.

Working Principle

High-temperature flue gas (180–500°C) discharged from glass melting furnaces passes through the outer side of finned tube bundles. Circulating water or thermal oil flows inside the tubes for heat exchange.

1. Waste heat absorbed by the medium produces 60–180°C hot water / hot air, reused for glass raw material drying, fiber product curing and factory workshop heating;

2. After heat exchange, the temperature of flue gas drops sharply, reducing the load of subsequent dust removal and desulfurization equipment;

3. For large-scale glass fiber production lines, multiple sets of finned tube exchangers can be matched with HRSG to produce steam for auxiliary power generation, realizing multi-level cascade utilization of waste heat.

Main Energy-Saving Application Scenarios in Glass Fiber Plants

1. Raw material preheating: Preheat quartz sand, limestone and other glass raw materials with recovered hot air to reduce melting furnace gas consumption;

2. Fiber product curing oven heating: Replace natural gas heating with recycled hot water/air for fiberglass cloth curing;

3. Workshop constant temperature heating: Supply heat to drawing workshop and finished product warehouse in winter;

4. Flue gas waste heat steam generation: Cooperate with waste heat boiler to produce steam for factory bath, cleaning and power generation;

5. Waste heat cascade recovery: Low-temperature flue gas secondary heat exchange for domestic hot water supply.

We carry out targeted customized design according to glass fiber furnace flue gas flow, temperature, alkali content and factory heat demand:

- Adjust fin density, tube wall thickness and equipment overall size;

- Complete system matching design including bypass flue, circulating pump and control cabinet;

- Support OEM brand customization, provide installation drawings, thermal calculation reports and operation manuals.

All finned tube exchangers pass 100% hydrostatic pressure test and air tightness inspection, meet ISO, CE international standards for overseas glass factory projects. Our engineering team provides remote technical guidance and after-sales maintenance training.