The characteristics, advantages and disadvantages of several diesel dehydration technologies commonly used in refineries are introduced for the diesel with water caused by steam stripping. The principle, pilot test and industrial application of the new CFC dehydration technology are highlighted. The relationship between the module porosity and the dehydration effect and pressure drop of equipment was analyzed. The porosity suitable for the diesel dehydration system was preferably 80%. This technology has the characteristics of long-term stable dehydration, and provides a new technical idea for the field of diesel dehydration.

The general layout design of petrochemical plant is an important work. Based on the overall layout of the process, the best general layout plan is selected by comprehensively utilizing factors including site environmental conditions and reserved development space to minimize the land use and achieve a compact and reasonable layout of the production units, transportation routes, pipelines and greening facilities according to the material property, capacity, transportation requirements, and fire protection and environmental protection requirements of the plant. Some effective measures for general layout optimization of petrochemical plant are introduced from the aspects of site selection, layout of process units, building design，comprehensive piping layout, road design, reserved area and the selection and correct understanding of specifications.

Starting from the common quality control difficulties in petrochemical engineering design, this paper proposes the use of 3D collaborative design to solve the design quality problems. By analyzing the workflow of 3D collaborative design, this paper studies its systematic quality control methods in three stages in combination with its characteristics of digitalization, visualization and integration, including establishing and improving the rules in advance, strengthening inspection and verification during the process and implementing the quality records after the event. Taking SmartPlant Foundation as an example, this paper proves that the quality control methods of 3D collaborative design are effective in ensuring the integrity, reliability and consistency of design, and explores the innovation and development of quality management and control technology brought by 3D collaborative design

The principle and main characteristics of two coke quench processes, i.e. the overflow process and the soaking process, were introduced and compared. The improved overflow coke quench process is superior to the common overflow process due to its simpler process flow, lower investment and operating cost and less floor area. However, the pervasion of steam and the emission of sour gas still need to be solved. For the improved soaking process, such problems were avoided by separately treating the coke cooling water, and the cleaning frequency of coke cooling water tank was also reduced

This paper introduces six types of reboiler including kettle reboiler, built-in reboiler, vertical thermosiphon reboiler, horizontal thermosiphon reboiler, forced circulation reboiler and falling film reboiler, analyzes their advantages and disadvantages, and compares their separation performances. In theory, kettle reboiler, built-in reboiler and once-through reboiler have equal separation performance, equivalent to a theoretical plate. The functions of the baffle in tower kettle are to keep the inlet level of reboiler constant for the stable operation of reboiler, and to prevent the material from the downcomer of the last plate in tower from short-circuiting into the product, so as to maximize the separation performance of the reboiler.

his paper introduces several items related to the setting of expansion joint in the design of fixed tube sheet heat exchanger, including the explanation of the setting principle of expansion joint, i.e. the different expansion coefficients of the tube and the shell leads to overhigh differential expansion, resulting in non-conforming shell tube tensile stress, heat exchange tube tensile or compression stress, and heat exchange tube pulling force, so expansion joint needs to be set. The limiting conditions of allowing the thinning of tube body when the expansion joint is connected with the tube body by butt welding are introduced. Also the determination of the setting position of expansion joint is discussed. For vertical heat exchangers, the expansion joint is preferably set below the lug support, while for horizontal heat exchangers, it is preferably set on the side with less constraint of pipeline.

This paper briefly introduces the zoning and regional flow characteristics of simulated moving bed in the adsorption tower of PX adsorption separation unit, analyzes the importance of flow control valve in pumping loop and the specific requirements of the process for this valve, and proposes a specially designed double flow characteristic curve and a type selection scheme of the control valve with higher stability and wear resistance. The practical application effect of the pumping loop control valve manufactured using this scheme in the PX adsorption separation unit of a refining and petrochemical plant verifies the applicability and advantages of this type of control valve under this working condition.

The influence of process conditions of the washing unit in oxidative dehydrogenation of butylene to butadiene on the removal effect of organic compounds such as acid, alcohol, aldehyde and ketone was studied through process simulation with PRO-II software. The results indicated that the oxygen-containing organic compounds in effluent gas from the oxidative dehydrogenation reactor can be effectively removed, the acid, alcohol and ketone can be totally removed and the concentration of acetaldehyde and acrylaldehyde in the gas stream was less than 10 ppm(v) when the water temperature is below 20℃ and the mass ratio of water to feed gas is 0.5~0.6 in the cooling column, and the operating pressure is 0.6~0.8 MPag, the overhead temperature is 10~20℃ and the mass ratio of water to feed gas is 0.7~1.0 in the aldehyde removing column

Relying on a transformation project of EO/EG unit, a new ethylene oxide (EO) purification system was installed to operate with the existing one in series, so that over 80% of the EOE (ethylene oxide equivalent) capacity of the reactor could be used for PEO production, thus switching EG production to PEO production for the first time. High efficiency trays were installed in the new EO column to meet the requirements of capacity expansion, the heating control system was optimized to adapt to the more complicated feed composition, and an integrated aldehyde removal system was developed to control the aldehyde concentration in the new EO column.

The terminal oil and gas processing capacity of the CTEP in an oil field in the Middle East was improved by optimizing the crude oil processing process and equipment. The stability of gas phase was enhanced by optimizing the internal design of slug catcher, the equipment setting was optimized by optimizing the gas compression process, and the equipment selection was optimized and the investment was saved by optimizing the Phase I and Phase II gas materials. By optimizing the overall process flow and simplifying the gas compression process, the goals of steady production, investment saving and operating cost reduction were achieved, the energy was saved and the efficiency was enhanced

UDS-II complex solvent is used by Yuanba Natural Gas Treating Plant to remove impurities such as H2S, CO2 and organic sulfur in the raw natural gas. The treated gas can meet the first class specification of Natural Gas (GB 17820-2012). With the more and more stringent environmental protection requirements in China, a new edition of Natural Gas (GB 17820-2018) was issued in 2018 and the natural gas product of Yuanba Natural Gas Treating Plant couldn’t meet the requirements of the new standard. Combined with the characteristics of the natural gas desulfurization process and the natural gas product of the plant, the impact of the new standard on the plant was analyzed. Additional COS hydrolysis or molecular sieve desulfurization facilities can effectively improve the product quality and meet the requirements of the new standard. To further reduce the total sulfur content of natural gas product, the development of natural gas treating technology shall be strengthened continuously.

With the introduction of the Belt and Road Initiatives, the proportion of petrochemical projects in overseas markets will increase in the future. Polypropylene project is not only the first overseas petrochemical project of SINOPEC Engineering Incorporation, but also one of its key projects in the international market. This project adopts the IPMT + EPCC general contract management model. The scope of work includes engineering design, procurement, construction, intermediate handover and commissioning. Material control management unifies the management of equipment and materials procured by the project using Smart Plant Materials working software and Marian Report reporting documents. Taking the project material control discipline as an example, this article briefly discusses the methods, the difficulties and the solutions to the material control management on the sites abroad, and provides some ideas and directions for the future work

Smart Plant 3D (SP3D) is a 3D modeling software used in piping design based on material specification database, which provides material specification data for the design system according to SP3D interface program. This paper introduces the problems in the connection of materials with different specifications in SP3D, and puts forward the solution of database construction and the innovative connection scheme.

The steel structure of portal frame light-weight building has been widely used in petrochemical plants for its advantages of flexibly arranged column grid unrestricted by building modulus, easy prefabrication, short installation period, convenient disassembly, large venting area, easy to meet the explosion relief requirements of petrochemical plant, environmental protection and recyclable resources. However, irrational design and waste of resources occur from time to time. The rational design and optimization of portal frame light-weight building is systematic and complex. This paper analyzes the design rationality and the possibility of optimization from the aspects of the determination of structure type, importance level, load value, span and column spacing, purlin calculation, vertical support arrangement and connection nodes, so as to achieve rational structural design and lower investment

At present, Plant Design Management System (PDMS) is one of the most important 3D design software in petrochemical field. It shows advanced engineering design, construction and management concepts. In engineering design, the core idea of the software is to center on process flow and establish a detailed 3D digital factory model by realizing multi-specialty real-time collaborative design. Taking several links of an engineering design project including data integration, model design and mutual delivery of information as example, this paper discusses the ways and methods of collaborative design among various specialties, introduces the relevant design modules of PDMS and other professional software that can realize data input and output with PDMS，and elaborates that the collaborative design is partly based on the summarized experience of practical engineering applications and partly based on the attempt and exploration of collaborative design among various specialties on the PDMS software platform

With the transformation of China's energy structure, the proportion of natural gas in primary energy consumption continues to rise. China's natural gas liquefaction and receiving station projects continue to launch, and the proportion of LNG in the natural gas consumer market keeps rising. In the traditional project analysis, the use of fixed natural gas prices for measurement does not reflect the changes in the consumer market. This paper provides a dynamic prediction model based on machine learning method. The regression prediction is carried out by analyzing the key parameters of the domestic market. In the analysis of natural gas imports in the past decade, the simulation prediction results are good, which can effectively predict the LNG imports in China’s coastal areas

The production technologies and market forecast of ethylene glycol (EG), a chemical product with high added value, are discussed. This paper focuses on the analysis and comparison of the characteristics and costs of coal to EG process via oxalate and ethylene to EG process. The former has outstanding comprehensive economic benefits but unstable UV quality of the EG product. At present, EG production enterprises are faced with continuously emerging competitors. In order to reduce EG imports and improve the competitiveness of enterprises, some polyester plants adopt the mixing mode of two production processes, i.e. coal to EG process and ethylene to EG process.