Chart Industries pioneered the use of BAHX for cryogenic gas processing in the 1950s and we’ve produced over 13,000 units since. A Chart BAHX is a highly efficient, all brazed and welded compact heat exchange device that offers distinct advantages versus other heat exchanger types. They are designed in accordance with the world’s pressure vessel codes and deployed globally. Our principal design and manufacturing facility is in La Crosse, Wisconsin. Notable Chart firsts include the introduction of vacuum brazing, Core-in-Kettle®, mercury tolerant construction and Smart Layer™.
Plate fin heat exchangers are essential for cryogenic gas processing applications including Air Separation, LNG liquefaction, Nitrogen Rejection, Natural Gas Liquids (NGL) Recovery, Propane Dehydrogenation, Hydrogen Recovery and other low temperature natural gas and petrochemical processes. In addition to stand-alone units Chart offers fully assembled and tested battery assemblies and Cold Boxes.
- 氢气回收 (HYCO)
- 丙烷脱氢 (PDH)
- 液态天然气 (NGL) 回收
Single plate fin heat exchangers can be supplied pedestal mounted and insulated locally in the field. However, when the service requires multiple units assembled in series and/or parallel and ancillary process equipment such as vessels and drums, a cold box is the most efficient solution.
从外部上讲，冷箱是一种由碳钢制造而成的壳体，并配有法兰连接，方便在现场连接至生产工艺管道。It's best described as a process module incorporating all the following:
- Supports and houses
- heat exchangers
- other related cryogenic equipment
- insulation material
- Provides inert atmosphere
- Modular assembly, includes instrumentation
- Multiple services in a single piece of hardware
- Complete, compact package
Chart 的主要冷箱制造地位于美国路易斯安那州新伊比利亚市，这座滨海而建的工厂占地 40 英亩，并可直通美国两岸水道和墨西哥湾。
Chart’s patented Core-in-Kettle®, introduced in 1989, further extends the use of Plate Fin technology in a range of petrochemical and natural gas processes as an alternative to traditional shell and tube kettle reboilers. 外部容器采用了一个或多个铝钎焊热交换器取代管束，并提供比等效釜式和壳管式装置多 10 倍的传热面积和多 20 倍的“UA”。
The superior heat transfer performance can be utilized to produce a significantly more compact unit for new installations, or considerably more performance can be provided to existing installations by replacing the tube bundle with a BAHX retro-fitted into the same shell. 这是解决加工厂瓶颈问题的特效解决方案。
铝钎焊热交换器结构可实现低至 2°F (1°C) 的低温差，从而显著降低功耗并减少压缩机功率。
- The warm process stream fluid enters the heat exchanger through steel inlet nozzle(s) on the vessel shell. 入口喷嘴通过铝至不锈钢过渡耦合连接至交换器的铝制入口管。
- 在 BAHX 中，热流逆着冷流流动时逐渐冷却下来。
- BAHX 芯体外部形成液面以产生液压头，从而驱动冷流流过芯体。
- 被冷却的热流则离开 BAHX 和容器。
We continually innovate to enable our customers to meet their challenges and to further optimize the performance and longevity of our equipment. Before you purchase your next BAHX, ask us about the following design and construction features:
Mercury Tolerant Construction - under certain conditions liquid elemental mercury can have a detrimental effect on unprotected BAHX. Chart’s proprietary solution combines multiple design, material selection and fabrication features that work in tandem with guard beds to protect against attack. Since pioneering the technology in the 1980s Chart has supplied >800 mercury tolerant units with no reported field failures.
Smart Layer® is a predictive maintenance solution intended to provide prior warning when a critical threshold in the operational life of a BAHX has been reached and where continued mal-operation is likely to result in loss of containment. The vast majority of BAHX provide trouble-free operation for 20 years+ when operated in accordance with industry guidelines. However, excessive thermal gradients will weaken the unit’s integrity and can lead to external leaks developing. Typically, because these operating upsets go un-noticed, the leaks manifest without warning. With Smart Layer the leak path is contained and an emergency plant shutdown is avoided. As well as containing the leak path, Smart Layer simultaneously triggers an alert to the plant control room.
Consider Smart Layer in the context of a cost-effective insurance policy. It protects plants against severe loss of production revenue through unplanned shutdowns and the potential for damage to property and life should external leaks go unchecked. Rather like any protective device, it ensures peace of mind, regardless of deployment, from the outset.
Continuous innovation and investment in our technology and capacity enables our customers to maximize their opportunities.
Increased awareness, attention to operating data and process control will improve plant safety and reliability. Through Chart Lifecycle, we offer pro-active services intended to maintain the health and performance of your heat exchanger fleet to mitigate the risk of plant downtime and financial impact of lost production and revenue. Learn more at www.ChartLifecycle.com