The opportunity
A metal-finishing plant exhausted 18,000 m3/h of 160C air from curing ovens to atmosphere – pure lost energy. The brief was to recover it for winter make-up air heating and preheat a process water loop.
The solution
- 高温的 板式空气-空气换热器 （不锈钢材质，额定 200°C 以上）将排风中的热量传递给了进入的新鲜空气。
- 次级 空气-水盘管 将多余的热量导入了水缓冲罐。
- 易积污的排风要求采用可清洗芯体，并由我方提供维护计划 清洁指南.
Results
- 峰值回收约 520 kWth。
- 冬季燃气锅炉负荷降低约 35%。
- 投资回收期：2.8 年。
Lessons
Capture heat in grade order – high-grade first (process water), low-grade last (ventilation). Match the core material to exhaust temperature and contaminants. See 废热回收基础 以及 标准概述 在选型确定之前。
Why capture at the source
The plant curing ovens rejected 160C air continuously, a high-grade, high-volume stream far more valuable than typical ventilation exhaust. Recovering it at the source, before it mixes with cooler building air, maximizes the temperature lift available to the incoming make-up air and the process-water loop. This grade-first logic is the backbone of any waste-heat strategy.
Material and contamination matching
At 160C and with curing by-products, a standard aluminum core would not survive. The stainless, high-temperature-rated plate exchanger was selected specifically for the exhaust condition, and the fouling-prone nature of the stream dictated a cleanable core plus a maintenance plan. Matching material and cleanability to the exhaust is what keeps the 520 kWth recovery stable year after year.
From one oven to a program
A single successful project often reveals more opportunities. The same approach, measure the stream, grade it, pick a core rated for the temperature and contaminants, then verify savings, scales to other process exhausts across the site. Tracking recovered energy against the boiler baseline proves the case for the next project and supports any efficiency-reporting requirement.
常见问题
What did the industrial case recover?
About 520 kWth at peak from 18,000 cubic metres per hour of 160C oven exhaust, cutting boiler load about 35 percent in winter.
Why specify a stainless plate exchanger?
The exhaust at 160C and above, with curing by-products, needs a high-temperature-rated, cleanable material. Standard aluminum would not survive.
What was the payback?
About 2.8 years. The lesson is to capture high-grade heat first and match the core to the exhaust conditions.
How do I replicate this result?
Measure the stream, grade the heat, select a core rated for the temperature and contaminants, plan cleaning, and verify against the boiler baseline.
常见问题
What did the industrial case recover?
About 520 kWth at peak from 18,000 cubic metres per hour of 160C oven exhaust, cutting boiler load about 35 percent in winter.
Why specify a stainless plate exchanger?
The exhaust at 160C and above, with curing by-products, needs a high-temperature-rated, cleanable material. Standard aluminum would not survive.
What was the payback?
About 2.8 years. The lesson is to capture high-grade heat first and match the core to the exhaust conditions.
How do I replicate this result?
Measure the stream, grade the heat, select a core rated for the temperature and contaminants, plan cleaning, and verify against the boiler baseline.
相关产品
面向暖通空调与通风的板式、旋转式或热管回收。
空气与液体用大表面积固定芯体。
大风量用高效能量回收。
用于洁净场合的被动、完全分离气流。