火炬系统“本质安全”设计

火炬是石化厂处理全厂排放可燃气体的重要的安全环保设施。整个火炬系统本身的安全可靠是全厂各装置安全可靠运行和满足环保要求的重要保证。目前,火炬系统设计中使用了许多自动控制,自控仪表的失灵会给全厂带来安全隐患。火炬系统"本质安全"设计理念是解决全厂火炬排放气诸多不确定因素的重要保证。对石化厂火炬系统中主要的三大系统"本质安全"设计提出了应采取的设计方法,对今后同类设计具有借鉴和指导意义。

探讨高墩柱盖梁“本质安全”施工

支撑体系 ：盖梁抱箍法选择螺栓衔接 2 个半圆抱箍，基于静摩擦阻力支持顶部荷载，自下往上由双层抱箍、砂筒、承重贝雷架主梁、分配梁、底模组成，人员上下通道采用标准梯笼，分配梁上设置盖梁施工作业平台及防护栏杆。

“本质安全”理念下边疆电网企业技能人才培养模式探究

边疆地区作为我国领土的重要地段,其稳定和发展关系着国家安全和长治久安,尤其是电网机构的发展现状关系着整个国际民生及电力能源的运作,与人民群众的生活紧密相连.如果不进行规范管理就会出现大面积断电,不仅影响市民生活还会为地区经济带来严重损失,社会治安及公共安全等也会受到不同程度的干预影响.因此,必须本着“本质安全”理念加强边疆电网企业技能人才的培养,为边疆电网进行保驾护航,使电网机构更好的服务于社会及人民群众.

港口企业“本质安全工程建设”研究与探索

为切实保障企业安全,对港口企业"本质安全工程建设"进行研究与探索。分别介绍本质安全的起源及国内外安全管理系统的研究应用现状。结合我国本质安全建设背景,论述建立本质安全管理体系的必要性。详细阐述本质安全管理体系。结合企业特点及实际提出切实可行的构想及建议。

“标准化管理”打造“本质化安全矿井”——协庄煤矿“人本安全管理模式”介绍之三

人是组织管理中最不确定的因素,这也是企业安全管理难以把握的问题所在。一套行之有效的员工标准化评价系统的建立,是企业组织、管理人员、职工这三者协调一致、谋求共识的内在环境,它通过“标准”的设置,规范所有职工的行为。协庄煤矿2002年4月全面推行的以“思想标准化、语言标准化、行为标准化、操作标准化”为主要内容的标准化管理,是该矿安全管理理念和体系的一个重要组成部分,其目的就是让生产作业中的“标准”成为广大职工自觉运作的“规矩”,从而形成一种“标准化”的文化氛围。

Application of a novel detection approach based on non-dispersive infrared theory to the in-situ analysis on indicator gases from underground coal fire

Coal mine fires,which can cause heavy casualties,environmental damages and a waste of coal resources,have become a worldwide problem.Aiming at overcoming the drawbacks,such as a low analysis efficiency,poor stability and large monitoring error,of the existing underground coal fire monitoring technology,a novel monitoring system based on non-dispersive infrared(NDIR)spectroscopy is developed.In this study,first,the measurement principle of NDIR sensor,the gas concentration calculation and its temperature compensation algorithms were expounded.Next,taking CO and CH_(4) as examples,the liner correlation coefficients of absorbance and the temperature correction factors of the two indicator gases were calculated,and then the errors of concentration measurement for CO,CO_(2),CH_(4) and C_(2)H_(4) were further analyzed.The results disclose that the designed NDIR sensors can satisfy the requirements of industrial standards for monitoring the indicator gases for coal fire hazards.For the established NDIR-based monitoring system,the NDIRbased spectrum analyzer and its auxiliary equipment boast intrinsically safe and explosion-proof performances and can achieve real-time and in-situ detection of indicator gases when installed close to the coal fire risk area underground.Furthermore,a field application of the NDIR-based monitoring system in a coal mine shows that the NDIR-based spectrum analyzer has a permissible difference from the chromatography in measuring the concentrations of various indicator gases.Besides,the advantages of high accuracy,quick analysis and excellent security of the NDIR-based monitoring system have promoted its application in many coal mines.

Design and performance analysis of wireless sensor network location node system for underground mine

Aiming at the application of a wireless sensor network to locating miners in underground mine,we design a wireless sensor network location node system,considering the communication performance and the intrinsic safety. The location node system consists of a mobile node,several fixed nodes,and a sink node,all of whose circuits were designed based on CC2430. A varistor and a RC circuit were used in the reset circuit of a sensor node to guarantee the intrinsic safety by reducing discharge energy,the theoretical analysis of the discharge energy shows that the reset circuit is an intrinsic safety one. The analysis and simulation about the performance of the location node system are discussed,such as network communication delay and packet loss rate,the results show that the highest network communication delay of the system is about 0.11 seconds,and the highest packet loss rate is about 0.13,which assures the location node system has a high reliability,and can locate miners in the underground mine.

Design of intrinsically safe power supply

Aiming to make a high power direct current supply safely used in coal mine production, this paper made a deep research on characteristics of intrinsically safe power supply, using the mathematical model established according to coal mine intrinsic safety standards. It provides theory support for the application of high power intrinsically safe power supply. The released energy of output short circuit of switch power supply, and the close related factors that influence the biggest output short-circuit spark discharge energy are the theoretical basis of the power supply. It is shown how to make a high power intrinsically safe power supply using the calculated values in the mathematical model, and take values from intrinsically safe requirements parameters scope, then this theoretical calculation value can be developed as the ultimate basis for research of the power supply. It gets the identification method of intrinsically safe from mathematics model of intrinsically safe power supply characteristics study, which solves the problem of theory and application of designing different power intrinsically safe power supply, and designs a kind of high power intrinsically safe power supply through this method. energy, flyback

Development of an automated system for continuous monitoring of powered roof support in longwall panel

Described the development of an Intrinsically Safe System for continuous monitoring of load and convergence of powered roof supports installed at Iongwall faces. The system developed for monitoring of behavior of a powered support in a mechanized Iongwall sublevel caving face. The logging system can be programmed for logging the data from the sensors at different logging intervals ranging from 16 h to 1 ms for logging variation in hydraulic pressures in legs and convergence of the support during progressive face advance. For recording dynamic loads, the data logger can be programmed to start fast logging, say at 10 ms intervals, when the pressure in a leg reaches a pre-specified threshold value, and continue fast logging until the pressure drops below this threshold value. This fast logging automatically stops when the pressure drops below this threshold value.

Step change approaches in coal technology and fugitive emissions research

Multi-factor productivity(MFP) in underground coal mining has been on the decline for the last decade.The mining industry requires a viable and sustainable approach to overcome the current downtrend. This is only possible by concurrently focussing on productivity improvement and operating costs reduction,delivered through both incremental and step change technology development. Four technologies are presented in this paper: fibre optic borehole sensing has been demonstrated to reveal detailed information about gas flow influx, water level and borehole blockage events occurring along the length of a surfaceto-inseam lateral. Fibre optic gas sensing has also been investigated, and this technology promises a remote, intrinsically safe, distributed solution. Recent developments in continuous water jet drilling technology have demonstrated a step change increase in drilling rates and flexibility for coal seam degassing,applicable in both surface-to-inseam and underground in-seam applications. The application of water jet technology to the cable bolt drilling problem offers potential to address a serious health and safety and productivity issue in the roadway development process.

Thinking substation construction project management methods

One of the most important tasks of security is the quality of the project substation substation construction project management, construction project management, including project bidding and engineering, electrical engineering and civil construction, engineering, quality control, safety management and supervision costs control, on-site supervision over the links, these links chain, indivisible, so long as a part of the management problems, will lead the entire construction project management effectiveness be affected, so it must be every link control and management work done, in order to guarantee the quality of the entire substation, in order to make security of supply substations, electrical safety and vital interests of users are protected. In this paper, the author details the three aspects substation construction management of the project, namely the concept of substation engineering, project management and construction safety, through these three aspects, the author analyzes the construction project management substation existing problems, To solve these problems and issues proposed some measures and construction process that need attention. It launched separately from the design, schedule, quality and other aspects of security and research, and in the course of the study stressed the importance of coordination between elements of construction and construction sectors as well as cooperation between the construction, explains the importance of the project cost control.

Characteristic investigation of permanent magnet actuator for vacuum contactors operating with an intrinsically safe low voltage

This paper reports a new application of permanent magnet actuator for vacuum contactors.A novel permanent magnet(PM) actuator to drive a vacuum contactor with intrinsically safe and low supply voltage is proposed.PM is mounted on the static iron of the contactor to enhance its holding force and reliability.While only one coil is used to break the vacuum contactor,two series coils are deployed to yield a high magnetomotive force to realize the making operation.The electrical circuit equation,mechanical equation and magnetic field are all coupled in the simulation.A prototype is manufactured and tested to validate and showcase the performance of the contactor which is equipped with the proposed PM actuator.