[Ethylene Cracking] Are the ethylene cracking furnace quenchers of Sinopec Hainan, Zhongke Refining and Gulei Refining made in China? 》

I asked someone in SEI's purchasing department and it seems they are imported.

[Ethylene Cracking] Cracking furnace equipment components discussion summary post https://bbs.hcbbs.com/thread-3308724-1-1.html (Source: Huahaichuanliu-Haichuan Chemical Forum Network)

On October 3, 2019, with the cooperation of a 1,000-ton crawler crane main crane and an 80-ton crawler crane, the first quencher of the Yantai Wanhua 1 million tons/year ethylene cracking furnace built by Shijian Construction was successfully hoisted in place, kicking off the installation of the quencher of the cracking furnace. The ethylene project has a total of 6 cracking furnaces. Each of the cracking furnaces No. 1 to 5 includes 8 primary quenchers and 2 secondary quenchers. The primary quencher is 24 meters × 3.8 meters and weighs 30 tons; the secondary quencher is 14 meters × 2.2 meters and weighs 56.1 tons. The No. 6 cracking furnace includes 3 primary quenchers and 2 secondary quenchers. The primary quencher is 21 meters × 7 meters and weighs 24 tons. The secondary quencher is 7.6 meters × 2 meters and weighs 28 tons. The second stage quencher is 14 meters × 2.5 meters and weighs 52 tons. The quench coolers are all produced by the German Borsig Company. As imported equipment, they are precision manufactured and rigorously packaged. The wood used to protect the finished product and the tooling used for unloading the truck in a quench cooler of more than 30 tons each weigh more than 3 tons. The lifting requirements are extremely strict. The hoisting of this equipment faces many difficulties. First, the steel structure has been completely completed, and the hoisting of the quench cooler requires intermittent installation, and collisions are not allowed. Secondly, the hoisting height reaches more than 55 meters, which is very sensitive to the influence of weather and wind. When the weather permits, hoisting personnel are required to find every opportunity to hoist it in place quickly. Based on the construction characteristics, the Shijian Project Department prepared the construction plan in advance, formulated corresponding safety technical measures, rationally selected cranes, and formulated emergency plans to ensure the smooth progress of on-site hoisting work.

On August 10, 2014, six quench heat exchangers in the Qilu ethylene cracking unit were successfully developed at Qilu Petrochemical Machinery Manufacturing Company. Three of them have been used in the Qilu ethylene cracking unit and have been running smoothly for 60 days. On October 10, Qilu Petrochemical Machinery Manufacturing Company held a grand product promotion meeting for new quenching heat exchangers. Nearly 30 people including leaders from Sinopec, Shandong Provincial Special Supervision Institute Zibo Branch, Beijing SEI, Shanghai Wison, Qilu Petrochemical and other relevant departments and well-known domestic chemical equipment experts attended the event. * meeting. The new quench heat exchanger is one of the core equipment in the ethylene cracking unit. It is a vulnerable equipment under the action of high temperature difference, and in the past, it had to be imported. The main working principle of this equipment is to rapidly reduce the temperature of ethylene cracked gas at high temperatures in a very short period of time, maintain the stability of the cracked gas, and increase the triene recovery rate. Therefore, the equipment has harsh working conditions and high technical requirements. The main difficulties in manufacturing this equipment are: 1. Welding the connection seam between the heat exchange tube and the tube plate at the cracked gas inlet end. The type of joint is deep hole butt welding, and the pipe diameter is Φ63.5×6.5mm. The deep hole welding is performed at 58 mm from the end face of the tube plate. The welding is extremely difficult. The most important thing is that no repair is allowed. Once a welding defect occurs in a certain area, the entire equipment will be scrapped. The welding must be successful in one go to ensure 100% compliance. 2. The key to the welding of the cracked gas outlet combined joint in the prestressed state is the welding of the first layer, which is mainly fusion welding without filler wire. It is extremely difficult, and no repair is allowed after welding. The same requirement is that the welding must be successful in the first time. 3. The high machining accuracy of the tube plate, especially the tube plate processing at the cracked gas inlet end, is the key to the success of the entire equipment manufacturing. The dimensional accuracy requirements for the tube bridge and heat exchange tube holes are extremely demanding, and a special CNC boring and milling machine must be used for precise mechanical processing. 4. Pre-stretching of heat exchange tubes. The purpose of pre-stretching is to pre-add a reaction force on the heat exchange tubes and tube sheets to resist the huge internal stress caused by the high temperature difference during the operation of the equipment. Therefore, the pre-stretching amount is too large or too small, which will seriously affect the service life of the quenching heat exchanger. In this regard, Qilu Petrochemical Machinery Manufacturing Company has carried out research on manufacturing difficulties one by one. A research team headed by the chief engineer was set up. The company first introduced advanced CNC boring and milling machine equipment, and then purchased the world's most advanced deep-hole special welding equipment from French Polysudi, the world's best AUTOGTAW welding machine manufacturer. Because the difficulty and technical requirements are very high, the operating skill level of welders is very high. For this reason, the company selected 6 welders with excellent operating skills and went to Shanghai for a one-month training on this equipment. They then conducted more than 70 days of special training at Qilu Petrochemical Machinery Manufacturing Company. A total of more than 600 simulated test pieces were welded, and the requirement was to ensure that a 100% RT test was passed. After repeated trials and learning * , assessment, the welding personnel have eliminated their fear in their hearts, their self-confidence has increased, and they have mastered the operating skills so that they can judge whether the welding machine is operated correctly or not by listening with their ears. In actual welding, according to the process requirements, preheating must be above 200°C before welding without interruption. During those days, everyone worked in three shifts for welding. The high temperature and high manufacturing difficulty tested every employee. July was the height of summer. The employees participating in the construction were sweating profusely but never complained about being tired. Finally, after arduous efforts, 6 quenching heat exchangers were successfully manufactured. After strict testing, all 6 pieces of equipment passed the test, and 3 pieces of equipment were applied to Qilu’s ethylene cracking unit, and users responded very well. At this product promotion meeting, representatives, designers, users and other experts all agreed that the product has reached the domestic leading level and has good promotion value. Qilu Petrochemical Machinery Manufacturing Company has successfully developed this product, especially the deep-hole butt welding technology (pipe wall thickness 6.5 mm) under pre-tightening force, which is the first application in China. It uses scientific and technological means to quickly occupy the commanding heights of the market, enhance the development potential of the enterprise, inject new vitality into the development of the enterprise, and will definitely bring considerable social and economic benefits.

Awesome, advanced. :lol

That is, it is made in China. I don’t know the specific manufacturer.

Domestic. Once written, it becomes complicated.