1, LUMMUS company
Lummus's ethylene production technology plays an important role in the ethylene industry, and its olefin plant design experience has a history of more than 50 years. At present, nearly 200 ethylene plants around the world have adopted Lummus production technology, with a total production capacity of over 40 million tons, accounting for about 30% of the total global ethylene production capacity.
In China, four ethylene plants with a capacity of 300,000 t/a were imported from Yanshan, Yangzi, Qilu and Shanghai in the early 1970s, and the ethylene plants in Panjin and Fushun began to be built in the early 1990s, and the medium-sized ethylene plants in Xinjiang, Tianjin and the Central Plains began to be built in the mid-1990s.
Lummus technology was used in two rounds of reconstruction and expansion of ethylene plants in Yanshan, Yangzi and Qilu around 2000, joint venture projects between Secco and Fujian around 20 10, and two million tons of ethylene and 2.5 million tons of ethane cracking projects planned by Tianjin and Zhenhai Satellite Petrochemical Company.
The main features of this process are as follows:
(1) SRT series cracking furnace is adopted, which has high thermal efficiency, strong adaptability of raw materials, suitable for both light and heavy raw materials and high ethylene yield.
(2) The quench zone is equipped with an oil circulation viscosity reduction system, which can effectively reduce the viscosity of quench oil at the bottom of gasoline fractionator and increase the kettle temperature.
(3) Sequential separation and low-pressure demethanization are adopted in the separation process.
(4) Using binary and ternary mixed refrigeration technology, ternary refrigeration can reduce the number of equipment and investment.
(5) A new catalytic distillation technology for propyne/propadiene hydrogenation.
(6) Low-pressure propylene rectifying tower and propylene machine form a heat pump.
Standard & Poor's. W company
Standard & Poor's. W Company is one of the famous ethylene patentees. More than 130 ethylene plants have adopted S&W technology, and its production capacity accounts for 30% of the total ethylene production capacity in the world. Since 1990, 40% of the world's new production capacity has adopted S&; W technology.
In Novachem, Canada, S&; W Company has built the largest ethylene plant with ethane as raw material (65438+270,000 t/a) in China. In China, Daqing, Maoming 1# and Guangzhou Ethylene, Yamba and China Shipping Shell have two sets of joint venture ethylene.
Software technology.
The main features of this process are as follows:
(1)USC cracking furnace: high thermal efficiency of 93% ~ 94%; Suitable for light and heavy raw materials; High olefin yield; The furnace tube has long service life.
(2)SLE (select linear heat exchanger) quench boiler: minimum volume; Short stay time; The coking is extremely low, so there is no need for off-line coke cleaning.
(3) The viscosity of quench oil is adjusted by stripping the pyrolysis gas of ethane furnace, which solves the problem of viscosity control of quench oil.
(4)HRS (Thermal Integrated Distillation System): the combination of thermal integration and component distillation; Adopt heat pump technology to reduce energy consumption; Reduce the consumption of refrigerant; Before using double-tower depropanization hydrogenation and double-tower high-pressure demethanization, the investment was reduced and the competitiveness with other processes was improved.
3.KBR company
KBR belongs to Kellogg and b&; R merge. The original Kellogg ethylene technology is characterized by adopting millisecond cracking furnace and sequential separation process; B& amp； The separation process of R is pre-deethanization and pre-hydrogenation for gas cracking raw materials and pre-depropanization and pre-hydrogenation for liquid cracking raw materials.
The first round of ethylene reconstruction and expansion in Daqing added 654.38+800,000 t/a, that is, the pre-depropanization and pre-hydrogenation process provided by the original by R company, which is running well at present.
After the establishment of B& Kellogg KBR Company; The technologies of R and EXXON are combined to form a new "SCORE" technology. This technology was adopted in the 450,000 t/a ethylene line newly connected in parallel in the second round of ethylene transformation in Lanzhou.
In recent years, five 200,000-ton ethane/propane/naphtha composite cracking furnaces have been used in the joint venture olefin plant of BP and Ineos in the United States, and nine 200,000-ton cracking furnaces have been used in the Kayan project of Sabic Company.
The characteristics of KBR ethylene technology are as follows:
(1) cracking technology: the raw materials have wide adaptability, and a variety of raw materials such as ethane -VGO can be used; One-way furnace tube, short residence time and high output; Different raw materials can be cracked in different areas; Can be used for online coke cleaning, thus prolonging the online operation rate.
(2) The quench oil system has viscosity control measures.
(3) separation technology: pre-deethanization and pre-hydrogenation process (gas raw material); Pre-depropanization and pre-hydrogenation process (liquid feedstock); The deethanizer can produce 30% ethylene; The ethylene tower and the ethylene machine form a heat pump system; Propylene tower and propylene machine form a heat pump.
4. Linde Company
Linde Company is a famous ethylene industrial company, specializing in cryogenic and air separation.
In terms of ethylene production technology: Linde Company built the world's first cryogenic separation plant to produce ethylene in 193 1; Linde Company built the first large-scale ethylene production plant on 1965, adopting thermal cracking, cracking gas purification and low-temperature gas separation technologies.
At present, Linde Company has built more than 300 cracking furnaces in the world, and more than 30 large-scale ethylene production plants in 15 countries adopt Linde Company's technology, accounting for about 20% of the total production capacity of existing plants in the world.
In China, Linde Company built a 40,000 t/a cracking furnace in Shanghai Petrochemical Company on 1984. 1 10,000 tons/year ethylene plant in Jihua, which was completed and put into operation in September, 1996, and 700,000 tons/year ethylene plant which was subsequently rebuilt and expanded, as well as Dushanzi 1 10,000 tons ethylene plant in Xinjiang, ethane cracking plant in Saudi Arabia110,000 tons and ethane cracking plant in Ruweis, United Arab Emirates, all adopted Linde's technology.
The main features of this process are as follows:
(1) cracking furnace features: unique design of cracking furnace; Suitable for heavy cracking raw materials with diesel oil and hydrogenated tail oil as raw materials; Secondary steam injection technology; The radiation section can be a single furnace or a double furnace.
(2) Characteristics of separation process: pre-deethanization; Pre-hydrogenation and isothermal reactors are used for C2 hydrogenation; The ethylene distillation column adopts heat pump system; Acetylene can be recovered by solvent absorption.
5. Third Party Logistics /KTI Company
The quotation technology of TPL/KTI company is Topkin technology, which consists of GK cracking furnace of KTI company in the Netherlands and TPL gradual separation technology of Desini Cloth Group.
The two companies were established in 197 1. Since the merger, 16 ethylene plants have been designed, with a total production capacity of over 5 million t/a, and 15 plants have been rebuilt and expanded. Its 600,000 t/a ethylene plant is designed to reach 1 1 set, and it has rich general contracting experience.
China Liaoyang and Beijing Dongfang Ethylene Plant adopt Desini Bu Group technology, Dongfang Ethylene is designed by TPL, KTIGK-V cracking furnace and simplified asymptotic separation technology are adopted.
KTI Company has its own characteristics in the design of cracking furnace. Its cracking furnace is GK type, and it has the only commercial output prediction software SPYRO in the world. KTI Company developed and designed an advanced GK-V cracking furnace by using SPYRO software and its own experience.
GK-V cracking furnace is a double-pass furnace tube, with large specific surface area in the first pass and large flow area in the second pass, which is beneficial to reducing hydrocarbon partial pressure. This can improve the thermal strength of the heating section wall, reduce the residence time of reactants, reduce the partial pressure of hydrocarbons and improve the yield of olefins.
The gradual separation technology of TPL company is to achieve the purpose of separation with minimum energy consumption. The basic principle is that the adjacent components are not completely separated, and the components with far difference are completely separated, and the ideal separation sequence is realized by multi-step separation method. In order to reduce the compression and refrigeration power in the process of asymptotic separation, combined with its process characteristics, the medium pressure double tower demethanization was adopted.