On January 2, 2021, the well-received Heilongjiang Haiguolongyou Petrochemical Co., Ltd. received a good news: the largest single-set catalytic thermal cracking unit in China - Haiguolongyou 550 project 2.3 million tons/year catalytic thermal cracking The device, a successful start-up, produces qualified products. Haiguo Longyou 5.5 million tons/year heavy oil catalytic thermal cracking and 950,000 tons/year polyolefin project (referred to as "Dragon Oil 550") is located in Linyuan Park, Daqing High-tech Industrial Development Zone. It is one of the three "oil heads" in Heilongjiang Province. "One of the projects. As the core device connecting the refining and chemical links of the 550 project, the 2.3 million t/a catalytic thermal cracking unit of the Haiguolongyou 550 project has been successfully commissioned, providing a prerequisite for the full production of the project's "chemical tail" polypropylene and polyethylene plants. , marking that the 550 project has entered the production stage of the whole industry chain. After the project is completed, it can provide 3.5 million tons of petrochemical products to the market every year, and the sales output value can reach 19.3 billion. Anhui Huanrui MI heating cable In the "Dragon Oil 550" project, the 1 million tons/year suspended bed residual oil hydrogenation unit and the 2.3 million tons/year catalytic thermal cracking unit are the largest single-set projects in the country. Two sets of 350,000 tons/year and 200,000 tons/year polypropylene production lines not only have high-end and differentiated products, but also achieve low cost and high competitiveness. The raw materials are eaten and squeezed, and all of them are converted into chemical products, so that a drop of oil will not fall to the ground, maximize the use of crude oil, and achieve the purpose of high efficiency, energy saving and environmental protection. In order to ensure the continuous and stable operation of the device and equipment in different temperature environments, the project party selected Anhui Huanrui MI heating cable for heating and thermal insulation of its device. Huanrui MI heating cable is specially designed by Anhui Huanrui for industrial high temperature areas, complex environments and commercial environments. It is suitable for heating and insulation of industrial and commercial pipelines and storage tanks. MI heating cable is made of single or multiple alloy heating wires as heating source, high-purity, high-temperature, fused crystalline magnesium oxide as thermal insulator, seamless continuous stainless steel or copper tube as sheath, and is manufactured by special production process. Has excellent mechanical strength and strong corrosion resistance. The project is located in the northeastern region of my country. Facing the project difficulties such as extreme low temperature conditions in winter and many installation devices, Anhui Huanrui engineers demonstrated excellent technology and services for t...
PetroChina Karamay Petrochemical Company is located in Jinlong Town, Karamay City, Karamay District, Uygur Autonomous Region. The white oil hydrogenation unit is currently one of the few domestic devices that use more advanced hydrogenation methods to produce white oil products. It produces a variety of specifications. White oil is widely used in industry, cosmetics, food, medicine and other fields. The white oil products of various brands and grades produced by Karamay Petrochemical Company have been popular in the domestic market, with high reputation and popularity and considerable economic benefits. In response to the various needs of the heat tracing project of this device, Anhui Huanrui provided a complete set of electric heat tracing solutions. Project difficulties 1.The reaction temperature changes greatly, and the catalyst activity is easily affected. The white oil high-pressure hydrogenation unit is a high-temperature, high-pressure hydrogenation catalytic process. After the raw materials, catalysts, and pressure are determined, temperature is the main factor affecting desulfurization, denitrification and conversion rate, and it is also the main means to control the reaction depth. For the first-stage reaction, appropriately increasing the reaction temperature can increase the desulfurization and ammonia removal rate, reduce the pollution and poisoning of the second-stage catalyst, and create conditions for the second-stage reaction. However, the reaction temperature is too high, especially when the bed temperature is too high, on the one hand, the cracking reaction of the reactants is increased, so that the low boiling point components increase, and the yield decreases; on the other hand, the bed layer is caused to accumulate coke and the pressure drop increases. The catalyst life is reduced. Therefore, during the production process, the reaction temperature needs to be kept within an appropriate range, and stable and continuous. 2. The pipeline has steam purging requirements, the highest temperature can reach 200 ℃ Steam purging is suitable for conveying power steam pipelines or thermal pipelines, purging with large flow of steam, and the flow rate is not less than 30m/s. Press steam-slowly raise the warm tube-constant temperature for 1h-purge-stop the air to cool down-reheat the pipe to increase the temperature, constant temperature, the second purge, and this repetition is generally no less than 3 times. Under long-term high temperature conditions, the electric heating cable needs to ensure normal and stable operation under high temperature conditions, and must withstand a temperature of 200°C. Solution In order to further confirm whether the electric heating cable can meet the reaction temperature. Before the installation, the company's engineering department cooperated with the main business unit to conduct field tests on the heat tracing performance. The heat tracing has a fast heating speed, high temperature resistance, temperat...