ABSTRACTS

AnalysisandDeterminationofSafetyValveDischargeamountunderFailureConditionofLiquidPhaseControlValve
Su Fengli

(WisonEngineering(China)Co.,Ltd.Shanghai201210)

The failure condition of the control valve is one of the working conditionsfor the calculation of the discharge amount of safety valve, which is related to the safe operation of the plant. However, the current domestic relevant specifications and manuals rarely mention its specific calculation method. This paper focuses on the calculation method and process flow of the relief valve discharge amount when the liquid control valve fails, and analyzes the factors that need to be considered in the iterative process of the maximum throughput of the control valve. According to the engineering design experience, combined with the actual piping system where the control valve is located, a detailed calculation example is given to facilitate the designer to calculate the safety valve discharge amount more accurately and provide a basis for subsequent safety valve selection.

Keywordscontrol valve failure safety valve discharge amount piping system

ApplicationofGasChromatographyinGasAnalysisofAmmoniaProject
Guo Kun

(ChinaChengdaEngineeringCo.,Ltd.Chengdu610041)

Because of its high sensitivity, high separation efficiency and fast analysis speed, gas chromatography has a very wide range of applications in gas analysis of ammonia projects. This paper discusses the schematic design of gas chromatography in the ammonia project based on actual gas analysis data.

Keywordsammonia gas chromatography gas analysis

ApplicationofRapidAssessmentTechnologyofMagneticStressforGasPipelineSettlement
Yang Tao, et al

(ShandongNaturalGasPipelineCo.,Ltd.Jinan250000)

This paper describes the principle of rapid assessment of magnetic stress for gas pipeline settlement. Based on the metal magnetic memory effect and inverse magnetostriction effect, the stress distribution of the pipeline body is analyzed by detecting the additional weak magnetic field generated by the stress concentration of the buried pipeline. Aiming at the problem of pipeline settlement in a natural gas station, the local pipeline magnetic stress detection work is carried out to evaluate the stress concentration state of the pipeline, which provides an experience reference for the application of magnetic stress technology in the rapid assessment of pipeline settlement.

Keywordsmagnetic stress technology gas pipeline settlement rapid assessment

DiscussiononCalculationMethodofVacuumCoolingCrystallizationCoolingCapacity
Zhang Gang

(YueyangPotashSaltResearchInstitute,Yueyang414000)

In the vacuum cooling crystallization process, the cooling capacity is an important technical parameter. For a certain composition solution, the greater the evaporation capacity, the greater the heat of water vaporization, the greater the vacuum cooling capacity, and the greater the production capacity. The main factors affecting the cooling capacity are: extraction rate, initial temperature of solution, end temperature of solution, initial temperature of steam, end temperature of steam, steam density and latent heat of evaporation. This paper studies and discusses the calculation method of cooling capacity in the process of vacuum cooling crystallization.

Keywordsvacuum cooling crystallization evaporation capacity cooling capacity

AnalysisofMainPointsofSteamPipingLayoutofUreaPlant
Shi Cheng，et al

(ChinaWuhuanEngineeringCo.,Ltd.Wuhan430223)

This paper analyzes the design features of steam piping for various uses in the urea plant in combination with the layout characteristics of the urea plant, and puts forward the main points of attention and related suggestions in steam piping design of urea plant.

Keywordsurea plant steam piping main layout points

FeasibilityAnalysisofCO2SilencerInstalledinAmmoniaRecoveryStructure
Liang Yadong，et al

(ChinaWuhuanEngineeringCo.,Ltd.Wuhan430223)

This paper analyzes the feasibility of CO2silencer installed in the ammonia recovery structure. On the premise of meeting the process requirements and the safety of the operating environment, it reduces the project cost and provides a reference for the similar equipment layout.

KeywordsCO2emission concentration distribution silencer layout

PipingStressAnalysisofHighPressureSteamPipingModificationProject
Gao Hao

(BeijingPetrochemicalEngineeringCo.,Ltd.Xi’anBranch,Xi’an710075)

Aiming at the integrated piping and stress analysis calculation of high temperature and high pressure steam piping of phase 1 and phase 2 of a Coal Chemical modification project, the rational division and treatment of battery limit conditions are performed to obtain an optimized piping scheme. This paper chooses to install safe, reliable and economical supports and hangers, especially the selection of spring supports and hangers ensures the safe operation of high pressure steam piping and the connected equipment.

Keywordshigh temperature and high pressure piping design stress analysis spring supports and hangers

CorrosionandProtectionofCarbonSteelBoltsinLNGReceivingTerminal
Qin Ran

(CNOOCPetrochemicalEngineeringCo.,Ltd.Jinan250101)

This paper introduces the corrosion environment of the LNG receiving terminal and the hazards of bolt corrosion, analyzes the reasons for the increased corrosion of carbon steel bolts in the LNG receiving terminal, introduces the anti-corrosion measures of carbon steel bolts, and provides a reference for mitigating the corrosion of carbon steel bolts in future LNG receiving terminal projects .

KeywordsLNG receiving terminal carbon steel bolt corrosion protection

ApplicationofCathodicProtectionTechnologyinBuriedSteelPipeline
Yan Jinxia

(CNOOCPetrochemicalEngineeringCo.,Ltd.Jinan250101)

This paper discusses how to achieve the most reasonable and effective anticorrosion effect of buried steel pipelines through the introduction of sacrificial anode and cathodic protection technology and the application in engineering examples.

Keywordscathodic protection technology sacrificial anode buried steel pipeline anticorrosion

ComparisonoftheEffectofJetEvaporatorandFallingFilmEvaporator
Liu Dianyu

(HuayuDairyMachineryManufacturingCo.,Ltd.Anda151400)

This paper describes the working principle of a kind of jet evaporator introduced in China, and compares it with the falling film evaporator to analyze its application effect and existing problems.

Keywordsjet evaporator falling film evaporator effect comparison

KeyPointsandOptimizationofCompressorLubricatingOilSystemLayoutandPipingDesign
Chen Lei

(WisonEngineering(China)Co.,Ltd.Shanghai201203)

This paper summarizes the key points of layout and piping design of lubricating oil system in engineering design. For the combined arrangement of compressor units, combined with specific engineering examples, this paper proposes the optimized layout scheme.

Keywordscompressor lubricating oil system layout design optimization

SelectionandApplicationEffectofNaturalGasCompressorforGasPressurizationandTransportationinGasField
Liu Zhongyu, et al

(BeijingPetrochemicalEngineeringCo.,Ltd.Xi’anBranch,Xi’an710075)

When the gas field enters the later stage of development and production, the gas well pressure and output keeps decreasing, and the produced natural gas pressure is too low to meet the external transportation requirements, so it needs to be pressurized by compressor for delivery. This paper introduces the selection, configuration, material and gas volume adjustment of the compressor for a gas-driven reciprocating compressor unit in a gas-gathering station, and evaluates the application effect of the compressor unit.

Keywordspressurization and transportation natural gas compressor application effect

DiscussiononDesignofSelf-SupportingSteelStack
Zhu Zhibin

(HualuEngineering&TechnologyCo.,ltd.Xi’an710065)

In this paper, the calculation for self-supporting steelstack design is carried out based on"Tower Vessel"NB/T47041-2014, and then the design calculation results are verified by using the finite element program ANSYS. In the design process, corresponding measures should be taken to reduce the stack amplitude and avoid resonance of the stack.

Keywordssteel stack finite element resonance srtake

EarthworkAnalysisofMountainousSite
Zhang Meimei

(CNOOCPetrochemicalEngineeringCo.,Ltd.Jinan250101)

This paper analyzes and summarizes the mutual influence between the amount of earthwork for site leveling of an enterprise and the selection of grading design types, the general plot plan and the site treatment methods for engineering reference and discussion.

Keywordsearthwork volume at site general plot plan grading design site treatment

AnalysisandApplicationofSecondaryAirVolumeMeasurementinaPowerPlant
Wu Ji

(ShenhuaFunengPowerGenerationCo.,Ltd.Fujian362700)

Combined with #3 and #4 ultra-supercritical units (2*1050MW) that have been put into operation in a power plant, this paper analyzes the structure and installation method of the secondary air volume measurement device, introduces the measurement principles and characteristics of two different air volume devices, and targets a power plant for the problem of inaccurate air supply volume measurement, several consultations and investigations of the same type of units are conducted to finally determine the optimal modification scheme. During the shutdown of #3 Unit, the secondary air volume device has a better online measurement effect after the modification and model change. The effect of the measurement is not affected by the load lift up and down test and the extension of its purge cycle observation, which can completely meet the accurate measurement of air volume under different working conditions, and the modification effect is good.

Keywordsultra-supercritical unit secondary air volume device structure measurement principle

(TranslatedbyLuLang)