Automation in Petro-Chemical Industry

Research and Application of five Chemical Process Safety Techniques

2018, 54(6): 0-0.

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According to the security requirements of special chemical production processes for dangerous chemicals, the research and application of five chemical process safety techniques were carried out, including the specification of hazardous chemical Material Safety Data Sheet (MSDS) and development of its management information system software, the calculation of DOW Chemical Exposure Index (CEI), Fire & Explosion Index (F&EI) and development of their evaluation software, chemical process dynamic early warning technology study and software development based on the artificial immune diagnosis algorithm, safety accident investigation management technology research and software development using predefined tree and fault tree analysis strategy. A chemical process safety risk management technology system was built in the paper, and we tried to control the safety risk of the special dangerous chemical production processes in the full production life cycle.

Analysis and Research on the Switching Time of Hydraulic On-Off Valves in Slag Lock Hopper System

2018, 54(6): 0-0.

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Based on "Shenning Furnace" coal gasification unit of a project, this paper describes the function and working sequence of the "slag lock hopper system" in the coal gasification process and the hydraulic control scheme for the on-off valves on the "slag lock hopper system" pipeline. Then in this paper, basic theory of hydromechanics is applied to demonstrate the calculation process of hydraulic on-off valves switching time, the reason why the switching time of those valves didn’t meet the technical requirements during the start-up process is analyzed and finally the solutions are proposed.

A Review on Status of Fire-Fighting Technology for Large Scale Storage Tank

2018, 54(6): 0-0.

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Tank fires were characterized by fierce combustion, high flame temperature and strong radiant heat. It was of great significance to improve the fire protection facilities of storage tanks and to study the fire fighting technology of storage tanks for controlling and reducing the loss of tank accidents.With the development trend of large-scale storage tanks in China, the difficulty of operation management and safety risk increased. The fixed fire fighting system of oil depot was based on the initial fire of the tank and the lightning fire of the sealing ring, which has the problems of large foam loss, jet blind area, long time to reach the liquid level, and does not have the ability to extinguish the fire in the whole area of the large storage tank.The paper introduced the new development of tank fire fighting technology at home and abroad, such as the automatic fire extinguishing gun on the top of storage tank achieved full area and no dead angle foam spray fire extinguishing, the automatic foam fire extinguishing unit with the advantages of fast starting, high fire extinguishing efficiency and no external energy and personnel, mobile large flow foam gun for successful extinguishing full level fire of 82.4m tank with maximum diameter. It was of great significance to learn from the advanced experience of foreign oil depot fire fighting technology to improve the reliability and emergency support ability of oil depot fire fighting system in China.

Brief Discussion on Instrumentation Cable Design in Chemical Plant

2018, 54(6): 0-0.

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As an important part of the chemical plant monitoring system, the performance index of instrumentation cable is an important factor that determines the safety and reliability of the entire control system. In review of the design principles of instrumentation cables in chemical plant, this paper utilities the common standards to summarize for the instrumentation cables, and analyzes the cable conductor, insulation, laying up, shielding, sheath, electrical characteristics, etc. Finally, the commonly used cable test standards are given, which is favorable to the selection and application of instrumentation cables in engineering design.

Discussion on Application of Emergency Shut-down Valve in Chemical Oil Tank Area

2018, 54(6): 0-0.

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The setting of emergency shut-down valves is of great significance for the maintenance of chemical oil tank area security, through the HAZOP analysis and LOPA analysis, the setting requirements of the safe instrument system are clarified. According to the regulations issued by the State Administration of Quality and Technical Supervision and related design specifications, and combined with previous engineering experience, the type selection design principle of the emergency cut-down valve is discussed, especially for its fireproof design. Finally taking the actual application of the emergency cut-off valve used in a benzene tank modification design as an example, the type selection design and safety interlocking scheme of the emergency shut-down valve in the chemical oil tank area are discussed, when it provides reference for the engineering design of emergency shut-off valve in the chemical oil tank area.

Research on Risk Assessment Method of Public Pipeline Passage

2018, 54(6): 0-0.

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Abstract：Pipe gallery is an important part of chemical industry. Because of its complexity and diversity, it is difficult in security management. If the leakage of the public pipe gallery fails, the accident will affect the surrounding pipelines and even threaten the safety of the whole park. Therefore, risk assessment for pipe gallery is of great significance. In this paper, based on the actual situation of public pipe gallery, the risk evaluation model of public pipe gallery is established from two aspects of failure possibility and failure consequence. The damage factor and management factor are used to modify the average failure probability, and the impact area after failure is used as a consequence, and finally the size of failure probability and the scope of the failure consequences are rooted. Using the model proposed in this paper, a case study of a public gallery in Shanghai Chemical Industrial Park is carried out and risk assessment is carried out.

Data Driven-Based Cascade Control for Boiler Drum

2018, 54(6): 0-0.

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Boiler drum water level has non-linearity, time-delay, large disturbance and is prone to produce false water level. On the basis of Data Driven Control(DDC) theory, the MFAC-PID cascade control scheme of drum water level is designed by adopting Model-Free Adaptive Control(MFAC). Applying the scheme to SMPT-1000 hardware-in-the-loop boiler simulation system through programming the control algorithm by CFC and SCL language in PCS7, the experimental results showed that the MFAC-PID control strategy can eliminate disturbances of steam flow and feed water flow in time, overcome the phenomenon of false water level and reach stable operation quickly, thus the boiler drum water level can be effectively controlled.

Application of Alarm Management and Abnormal Early Detection System in Pertochemical Plant

2018, 54(6): 0-0.

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Reasonable alarm management is a necessary element to realize the safety of process plant operations。Aiming at the importance of alarm management and abnormal early detection system in petrochemical plant ， the practical application of alarm management and abnormal early detection system is introduced in detail in several core devices of North China Petrochina Company ，including construction objectives、netwok architecture、applications program、function module 、actual on-site application performance and continued work after application。It is necessary to establish real-timely warning management 、timely warning and timely pre-control alarm management and abnormal early detection system to improve the stability and safety of the plant。

Derivation and Discussion of SIL Grade Formula Based on Markov Matrix

Li-Ming SHEN

2018, 54(6): 0-0.

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In recent years, the verification method of the safety integrity level (failure probability on demand) of the safety instrument system is mainly based on the formula method and the Markov method. In this paper, the 1001 and 1002 circuit models are taken as an example to discuss in depth how to establish the Markov state matrix and derive the verification formula of the failure probability based on the Markov state matrix.

Exploration and practice of information security in industrial control system

2018, 54(6): 0-0.

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With the development of the integration of industrialization and information technology, the relatively closed industrial control system has been linked to the internet. As Viruses and Trojans in the internet have posed a serious threat to the industrial control system, the governments and the enterprises attach great importance to the information security of it. Combining the coal-to-oil project, this paper introduces the situation of industrial control system, analyzes the present situation of the information security of the system and the risks and threats faced with it. With the development of the information technology of the industrial control system, the information security protection work has been continuously groped, improved and followed up in stages, which ensured the company’s information security of the industrial control system and the safety production.

The research and application of adopting 3D model technology to optimize the instrument design and construction

2018, 54(6): 0-0.

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3D model technology is widely used in a lot of petrochemical projects, and gets great effect in the piping and equipment engineering, but in the instrument engineering 3D model technology has not yet universal. Smart 3D is one of the most advanced 3D designing software, provides all the functions which will be necessary in design and construction phase, and it’s the base of standing digitalized factory and implementing intelligent management. Smart 3D has been used in some petrochemical projects, and has got great effect for optimizing work efficiency and improving project quality.

Microwave Measuring Signal Study on Air Drilling Cuttings quantity of sand drain pipe

2018, 54(6): 0-0.

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In this paper, the microwave quality flowmeter is used to measure the cuttings quality of sand drain pipe in air drilling. The cutting quality measuring system is designed. Based on the measuring principle of microwave flowmeter, according the radar theory and Doppler effects theory, the relationship of the Doppler frequency and the moving speed of cuttings is derived theoretically which considering the physical truth of cuttings in sand drain pipe. With the simplification of sand drain pipe conditions, micro-wave echo signal is simulated. The simulation signal is fully proved a stationary signal which is the basement of the further research about the relationship of the cutting quality and the micro-wave echo signal.

Analysis of leakage in oxygen cut-off valve of gasifier and Suggestions for improvement

2018, 54(6): 0-0.

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Abstract: In view of the problems existing in the use of oxygen cut-off valve in Texaco gasifier of a chemical plant, the cause of valve leakage was analyzed by using fault tree analysis method. Through studying two different types of oxygen cut-off valve, the improvement measures to solve the problems were put forward according to the actual use situation, and the oxygen cut-off valve of gasifier selection scheme is proposed.

Influence of Turbine flowmeter Measurement accuracy Factors and Countermeasures

2018, 54(6): 0-0.

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Factors influencing the accuracy of the gas turbine measurement system is complicated, based on the principle of turbine flowmeter, system composition, the influential factors of the gas turbine performance measurement system is analyzed, and according to the analysis of the influence factors of making the corresponding countermeasures, pointed out that in natural custody transfer metering should be to strengthen the operation maintenance and testing of turbine measurement system, in order to improve the turbine in natural gas measurement accuracy of the measurement system.

Analysis and Intelligent diagnosis Power plant chemical instruments

GenLai Zhou

2018, 54(6): 0-0.

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The reason and optimization of the damage cause of the gasification black water flash steam Angle valve

2018, 54(6): 0-0.

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this paper introduces the GE blackwater flash of coal-water slurry gasification technology of high pressure valve in the gasification and slag water treatment device in practical application, high pressure blackwater valve frequently appear in the process of running the phenomenon such as corrosion and scouring.Because of the particularity of the working condition, it is widely used to regulate the black water flow.The selection of projects of huahe Angle regulator in the actual production in the use of the valve body, valve core and valve seat and seat for the appearance of the flow channel scouring, flashing, cavitation and poor stability of running and valve jamming phenomenon.Through a comprehensive analysis of this phenomenon, a rationalization scheme was proposed from the structure design of the high-pressure black water Angle valve and the material selection of the valve core, seat, valve body and diffusion section.The operation cycle of high pressure black water flash steam Angle valve is improved to ensure the stability of the safe operation of the gasifier.

LaserGas Ⅱ laser oxygen analyzer in SAR application of regenerative furnace

2018, 54(6): 0-0.

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Use CUDA to calculate the combined protection scope of "rolling ball" lightning protection in petrochemical plant

2018, 54(6): 0-0.

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Based on the principle of the rolling ball method, the correct protection range of various lightning protection facilities is calculated by using the high performance parallel computing power of GPU, and the calculation method of joint protection of unequal high lightning arresters, lightning arresters and lightning arresters, which is not mentioned in the standard , is supplemented.

Carbon black temperature of dryer outlet in carbon black production Regulation control

2018, 54(6): 0-0.

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The outlet carbon black temperature of the drum dryer passes through the control mode of the outlet carbon black temperature of the granulating water feed-forward tail gas cascade drum dryer, the outlet temperature auto-regulating unit of the secondary hoist ,the automatic calculation unit for tail gas / water coefficient,Realize the whole process of automatic temperature control, as well as safety control interlocking scheme, to achieve and achieve the improvement of carbon black temperature control accuracy。

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