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2024-11
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2024-10
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2021-03
Introduction to Conventional Air-Cooled Heat Exchangers
A conventional air‑cooled heat exchanger is a device that uses ambient air as the cooling medium, which flows across the exterior of finned tubes to cool or condense the high‑temperature process fluid inside. It goes by various names, such as finned‑fan heat exchanger, air‑type finned heat exchanger, and finned‑tube air‑cooled heat exchanger; it is also referred to as an air cooler or an air‑cooled heat exchanger, collectively known as an air cooler. Originally, water was considered the more ideal cooling medium, so traditional industrial cooling systems typically employed water. Since the 1920s, however, air cooling has gained increasing attention, and in certain applications, water cooling has gradually been replaced by air cooling. This shift can be attributed primarily to the following factors:
2021-03-27
27
2021-03
How to clean a shell-and-tube heat exchanger
Long-term operation of shell-and-tube heat exchangers can lead to fouling by scale, resulting in reduced efficiency, increased energy consumption, and a shortened service life. If scale is not removed promptly, the equipment may face costly repairs, unplanned shutdowns, or even replacement. For years, conventional cleaning methods—such as mechanical techniques (scraping, brushing), high-pressure water jetting, and chemical cleaning (acid pickling)—have proven problematic: they often fail to completely remove scale and other deposits, while also causing corrosion to the equipment. Residual acids can induce secondary corrosion or under-deposit corrosion, ultimately necessitating equipment replacement. Moreover, the waste liquids generated during cleaning are toxic, requiring substantial investment for wastewater treatment. Enterprises…
2021-03-27
27
2021-03
Key Considerations for Replacing Heat Exchange Tubes in Shell-and-Tube Heat Exchangers
A shell-and-tube heat exchanger, also known as a tube‑bundle heat exchanger, is a type of partitioned heat exchanger that uses the walls of a bundle of tubes enclosed within a shell as the heat-transfer surface. This type of heat exchanger has a relatively simple structure, reliable operation, and can be fabricated from various materials—primarily metals—making it suitable for high‑temperature and high‑pressure applications. It is currently the most widely used heat‑exchanger design. Key considerations when replacing heat‑transfer tubes in a shell-and-tube heat exchanger: 1. The tube surfaces must be free of defects such as cracks, folds, or scale. 2. When tubes need to be joined by welding, each individual heat‑transfer tube may have no more than one weld; however, U‑shaped tubes may have up to two welds.
2021-03-27
27
2021-03
What is a plate heat exchanger? What are its advantages, and what are its typical applications?
A plate heat exchanger consists of metal plates—typically steel or stainless steel—that are stamped into corrugated channels with a specific geometric pattern. These individual plates are then assembled into multi‑plate packs. Sealing gaskets made of materials such as nitrile rubber are placed between the edges of adjacent plates to form fluid flow paths. Inlet and outlet ports are provided on the plates, allowing two fluids to flow through their respective channels and exchange heat. Due to the complex geometry of the flow channels, even at low flow velocities, turbulence is induced within the grooves, enhancing heat transfer efficiency. Moreover, the large number of channels increases the heat transfer surface area, making this a fast and highly efficient heat‑exchanging device.
2021-03-27
Chongqing Shuaihao Machinery Co., Ltd.
With deep expertise in the energy equipment manufacturing sector, we specialize in the R&D and production of energy‑specific equipment such as air coolers and pressure vessels, as well as industrial pipeline installation projects.
Address: No. 5, Annex to No. 8 Mingchen Avenue, Lianhua Subdistrict, Banan District, Chongqing City
Email:shuaihao@shuaihaojx.cn
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