Automation in Petro-Chemical Industry

Continuous Emission Online Monitoring Technology of Flue Gas VOCs and NMHC Emitted from Industrial Stationary Source

2016, 52(5): 0-0.

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In this paper, the definition, source, harm and control of VOCs are elaborated, a brief introduction of domestic relevant policies and monitoring market of VOCs is presented, and VOCs online monitoring technology and development trends are also analyzed, and the application of online monitoring for VOCs & Non-methane hydrocarbon (NMHC) with GC-FID system technology is focused on.

The selection and application of pressure transmitter under environmental embrittlement

2016, 52(5): 0-0.

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According to different sources of hydrogen embrittlement, this paper expounds the type of hydrogen embrittlement, pointed out the type of pressure transmitter hydrogen embrittlement belongs to. Emphatically analyze the process of hydrogen permeation of pressure transmitter diaphragm and three kinds of mechanism which trigger pressure transmitter diaphragm environmental embrittlement，beside that in view of different situations of cause pressure transmitter diaphragm environmental embrittlement, this article give the measures to be taken in the design and selection of pressure transmitter . Finally, combined with the specific project, this paper gives the selection of application of pressure transmitter under environmental embrittlement.

Research on the Advancement of Russia Oil Pump Unit Operation and Maintenance Standards

2016, 52(5): 0-0.

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With the political value, it was important to guarantee safety operation of Chinese and Russia crude oil pipeline. Domestic scholars already carried out the research on Russia pipeline standard, with attaching great importance to process operation and pressure testing and pipeline pigging of the main pipeline. The paper selected Russia oil station operation technical standards, and compared with domestic relative standards in terms of oil pump unit operation and maintenance and inspection and safe management. The advancement of Russia standards were expounded in detail, such as preferred pressure regulating systems for pressure protection model, and process pipeline inspection period determination principle, and pump operation conditions and service limit assessment based on pump vibration inspection, pump emergency shutdown based on pipeline emergency conditions and excessive pump operation parameter, and diesel generator to start fire pump technology, station fire systems inspection period, and the logical interlock relationship between vent systems and combustible gas concentration and pump shutdown, and pump impeller cutting, and pump base sinking monitoring.Finally, by means of learning Russia standards, recommendations are made to raise China oil station operation and management level.

The Application of Special Thermocouple In The Natural Gas Conversion And Methanol Synthesis Device

2016, 52(5): 0-0.

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A large domestic coal chemical project has produced the methanol which is made of natural gas and coal. And this realizes the complementary advantages of those two raw materials. This new method is deemed to a innovative projects, which firstly combine (residue)oil、natural gas、coal as the feed of methanol, and integrate the petroleum chemical industry and natural gas chemical industry with coal chemical industry. According to the project of methanol nature gas conversion and synthetic device is a process of condition and medium particularity，And as the result there have been the stringent requirement for the temperature measurement. This article proposed a better solution to temperature measurement for the special installation of natural gas synthesis conversion device including CRG Pre-reforming converter, reformer, and methanol synthesis converter. And this solution has obtained a good effect at the actual device operation.

Design of Gas Detection System Configuration Cases for Petrochemical Plant

2016, 52(5): 0-0.

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The design philosophy of gas detection system for petrochemical plant is presented. The design of gas detection system configuration cases is described in detail.

Discussion on the Anti-Surge Control Design of Centrifugal Compressor

2016, 52(5): 0-0.

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Considering the surge problem of centrifugal compressor due to narrow steady working condition area, the principle of surge and anti-surge of centrifugal compressor are presented. The design for cold and hot reflux pipeline in anti-surge control of centrifugal compressor is discussed and the recommended solution is provided. The key issues (e.g. setting of safety upper limit value, anti-surge control valve, pipeline layout at the outlet of compressor) are analysed.

Application of Integral Separation PID Algorithm in Acetone Waste Liquid Treatment System

2016, 52(5): 0-0.

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Abstract: Based on the temperature control system of acetone waste liquid treatment system has some characteristics,such as parameters time-varying,difficult to control and low stability,the temperature control system on the basis of the integral separation PID control algorithm and PLC S7-300 is designed,and use Simulink toolbox provided by MATLAB software to debug the temperature control system.the debugging results show that the system can eliminate the steady-state error of the system, improve the control precision and effectively enhance the stability of the system.

Offshore Platform Mobile Nitrogen System Temperature Control Algorithm Research

2016, 52(5): 0-0.

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Application Research of Safety Integrity Level Verification Calculation in Chemical Plant

2016, 52(5): 0-0.

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Abstract: SIL verification calculation is an important part of safety instrumented system design, the safety integrity level and calculation method are introduced in this paper, typical safety loop is calculated with the actual engineering example, and by comparing calculation result with safety evaluation result, loop safety instrument function can be meet the corresponding required SIL, By comparing the calculation result of IEC 61508-6 and ISA-TR84.00.02-2 and the influence of calculation result in different proof test interval, the characteristics of above 2 standards and the significance of verified calculation in proof test interval selection are expounded.

Natural gas distribution station using flowmeter signal to control the heater

2016, 52(5): 0-0.

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Analyses the certification management system in the construction and application of oil sales enterprises

2016, 52(5): 0-0.

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In accordance with the relevant provisions, the customer,who needs to provide relevant documents, is dealing with oil card, the related business such as value-added tax votes. At present,the data in the form of copy, scattered stored in the outlets, unable to share.There is a loss and leak risk information storage.The certification management system is discussed in this paper, it will be dispersed in all outlets and departments of certification documents, resources, documents, USES the unified format, named according to the specification, the collection to the license management system platform, unified storage, unified management, form a certification document data source, through the classification, file storage, retrieval, use, process tracking monitoring, security audit, strengthen the life cycle of a comprehensive document management.Through the data interface with the business system linkage, to real enterprise each department information When sharing, collaborative enterprise overall resources.

Heat transfer fluids heating system and heat measurement

2016, 52(5): 0-0.

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Compared with the use of steam to transfer heat, Heat Transfer Fluids (HTF) has a feature of uniform heating, easy operation, and low operating pressure. It widely used in many field. Because of high temperature, Pyrolysis and Thermal polymerization in heating system, HTF will produces polymer dope , sediment and coke. It could damage the instrument. Usually we should install filter at the entrance of circulation pump. HTF has strict requirement for tightness. The high temperature oil is dangerous, if HTF leaks. Hot oil’s pressure drops suddenly, oil vapor could be lit easily. So the most important thing is preventing oil from leaking in design of HTF measurement. We use welding as far as possible, and use bellows seal instead of stuffing. Different grade of HTF has large differences in Density, enthalpy and viscosity, if we use enthalpy difference method to calculate heat flow, we should get detail data of HTF.

Application of Integrated Self-tracing Throttling Device in Coal Chemical Industry

2016, 52(5): 0-0.

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Compared to traditional heat-tracing for instrumentation and its measuring pipe result in a high energy consumption,such as hot water heat-tracing，steam heat-tracing and electrical heat-tracing，self-heat-tracing can meet the goal of heat-tracing without using any energy,furthermore,self-heat-tracing can save the instrument's mounting material ,lower the quantity of instrument-maintaining work and improve the measuring accuracy.The structure designing idea of the integrated self-heat-tracing throttling device are introduced detailedly.Combined the practical application in coal chemical industry,the engineering experience of this instrument in the stage of engineering design,installation,operation and maintenance are summarized.

Custody Transfer Metering Instrument and Calibration of Volume Prover

2016, 52(5): 0-0.

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Abstract: With the development of ultrasonic flowmeters technology, this type of flowmeter is widely used for custody transfer metering applications of crude oil in overseas oil fields. Because of the large production of overseas oilfield, the diameter of pipeline for transporting crude oil is larger, usually for 32"and above which requires the flowmeter has a wide range of measurement. The less the cross section of metering trains, the more economic it is. Because the liquid ultrasonic flowmeter has a wide measuring range, small pressure loss, and can be measured bidirectional, it has been used widely in overseas oil Industry. Liquid ultrasonic flowmeter needs higher requirements for the calibration. The calibration procedure is detailed in API MPMS5.8.

Study On Thermowell Performance

2016, 52(5): 0-0.

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Analysis of the thermowell focused mainly on the relationship between natural frequency and vortex shedding frequency. Stress analysis is often ignored. Based on the ASME PTC 19.3 TW 2010, this paper introduces four criterions to determine if a thermowell is applicable, including frequency limit, steady-state stress limit, dynamic stress limit and hydrostatic pressure limit. Finally, an instance verifies the validity of the method. Meantime, the effect of geometrical sizes on thermowell performance is also analyzed. The paper provides some guidelines for the selection of thermowell.

The research and design of the leak monitoring system for small diameter oil pipeline

2016, 52(5): 0-0.

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This paper studies and designs a pipeline leakage monitoring system for small diameter oil pipeline between the oil well and the measuring room. The system collects the temperature parameters of buried pipelines and the pressure and temperature parameters in the measuring room, The system uses short distance wireless communication and Internet transmission data, To achieve a comprehensive monitoring of the leakage of small diameter pipeline.

Parts of Natural Gas Treatment Plant Off-Line Overhaul ESD System Test Analysis Implement

2016, 52(5): 0-0.

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The ESD (Emergency Shutdown) system as the highest level security systems in petrochemical production plant，also the production safety of the entire unit. Its safety performance whether meet the requirements determine the risk happens，can to ensure the safety of personnel and equipment. But on the premise of normal production，the system of emergency shut off valves，quick exhaust valve in a state of production safety. Unit of safe production in more than four years，has not been tested to verify that in case of an emergency，the system can immediately action，produce protective efficacy. During repair the AHDEB oil field gas plant，ESD system was tested， the feasibility，the preparation，emergency measures，implementation steps，the key lies in the test are introduced， two sets of equipment，a set of is in maintenance，another of production. The difficulty of this test is to ensure that in the normal production of production equipment，maintenance units need to test valve and actuator equipment in the ESD system was triggered， immediately shut down the valve switches and stop equipments correctly.

The analysis of temperature compensation in flow computer

Li Wei

2016, 52(5): 0-0.

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The temperature which is used for compensation in flow computer is often inaccurate. Based on the basic principle of three-wire platinum resistance, this paper prepares a good solution. The method extended to a number of pipelines and get a good application.

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2016, 52(5): 0-0.

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The improvement for ethene-oxide gas detractor

2016, 52(5): 0-0.

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Abstract: EO/EG plant has some characters,such as fireable,explolive andin petrol-chemical plant. In order to find the special gas_ ethene-oxide_that may be release,it is necessary to set a set of instrument to keep worker out of it. Because the old one is lack of sound and shining,we choice a new set to replace the old one.

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