【Ethylene cracking】What are the manufacturing challenges of the primary quencher (waste heat boiler) in an ethylene cracking furnace? Can it be manufactured domestically?

When searching online, there are very few images of this device

The jacket design, as well as the lining design at the Y-shaped component area, are the challenges.

Most customers choose imported quenching boilers, but there are also domestic manufacturers, such as Harbin Electric Power Equipment Factory.

In 1998, the manufacturing of 8 quench boilers for Daqing Petrochemical was completed, marking the first time that such boilers were produced domestically and filling a gap in China’s industry； In 2003, the manufacture of 16 quench heat exchangers for the cracking units at Daqing Petrochemical was completed, marking the first collaboration with KBR, an international leader in the quench heat exchanger industry; these exchangers have been operating well to this day ； In 2004, the manufacturing of 16 quench heat exchangers for the H-cracking furnaces at Daqing Petrochemical was completed, marking the first collaboration with Tianhua Institute – the leading design institute in China’s quench heat exchanger industry; these units have been operating well to this day ； In 2006, the manufacture of 12 quench heat exchangers for Maoming Petrochemical was completed, and they have been operating well to this day ； In 2006, the manufacture of 3 quench heat exchangers for Liaoyang Petrochemical was completed, and they have been operating well to this day ； In 2006, the manufacturing of 2 quench heat exchangers for Guangzhou Petrochemical was completed, marking the first time such U-tube type double-pass quench heat exchangers were produced; they have been operating well to this day ； In 2007, the manufacture of 6 quench heat exchangers for Shanghai Petrochemical was completed, and they have been operating well to this day ； In 2008, the manufacture of 36 quench heat exchangers for Tianjin’s 1 million tons per year ethylene plant was completed; these exchangers have been put into operation and are functioning well ； In 2009, the manufacturing of 30 quench heat exchangers for the Zhenhai 1 million tons/year ethylene plant was completed; these exchangers have been put into operation and are functioning well ； In 2009, the manufacturing of 18 quench heat exchangers for Jihua was completed; for the first time, Smith-type quench heat exchangers were manufactured and have since been installed ； In 2010, the manufacturing of 9 quench heat exchangers for Yangzi Petrochemical was completed, and they have been installed ； In 2010, the manufacturing of 2 quench heat exchangers for Guangzhou Petrochemical was completed, and they have been installed ； In 2010, the manufacturing of 16 quench heat exchangers for Jihua was completed, and they have been installed ； In 2011, the manufacture of 12 quench heat exchangers for Wuhan Petrochemical was completed, and they have been installed.

15 2011 Wuhan Petrochemical (800,000 tons/year) ethylene cracker quench heat exchangers 12 2012 16 2013 Panjin Petrochemical small ethylene cracker quench heat exchangers 2 2014 17 2013 Zhenhai Petrochemical ethylene cracker quench heat exchangers 8 2014 18 2014 CNOOC Huizhou, Guangdong (million tons/year) ethylene cracker quench heat exchangers 40 2016 19 2015 Lanzhou Petrochemical quench heat exchanger spare parts (individual tubes): 120 tubes 2016 20 2016 Shanghai Huisheng quench heat exchangers 4 2017 Total: 247 units and 120 tube spare parts

It feels like this structure is different; is there no outer shell? ? ? 、