多级机站通风系统改造

上海梅山冶金公司铁矿矿体厚大，井下各种井巷纵横交错，通风系统极其复杂，原采用大主扇通风，存在对风流控制能力差，风机效率低，井下有效风量率低等缺点。多级机站通风采用最小负压通风，均比压力梯度、控制漏风、风量调控等原理；采用系统优化．无风墙机站通风，抗冲击风机、节能风机、机站简化、计算机遥测遥控、机站自动风门等项新技术；系统采用4极．其中1、IV级机站有12台K40～19（B），110KW的风机，采用有风墙形式，主要起分风和导向作用，配以多台K4O－11（B）风机．这样1、三级机站把新鲜风流送往工作面，！、回级机站把污…     

多级机站通风系统改造

梅山铁矿的多级机站通风系统采用四级，其中Ⅰ、Ⅳ级主要克服矿井阻力，Ⅱ、Ⅲ级起分风与导向作用，并采用了系统优化、无风墙机站、抗冲击风机、机站简化、计算机遥控、机站自动风门等技术。系统投产后，并下环境明显改善，有效风量事和风机平均效率均达70％左右，节电率达40％以上，年节电500万千瓦时。     

矿井通风系统优化方法探究

矿井通风系统的正常运行对于煤矿的安全生产具有重要意义。为了保证通风系统的安全高效运行,必须定期对矿井的通风系统进行优化。在优化矿井通风系统时,选择合适的优化方法十分重要。重点分析了通风系统的优化方法,主要包括矿井通风网络优化方法和矿井风机运行工况点优化方法,以期为煤矿通风工程的进行提供一定的参考。     

豫能煤业更换主通风机通风系统分析

针对豫能煤业生产区域由西翼部向东翼转移,通风系统有较大改变,以及进入深部开采瓦斯涌出量可能增大、工作面温度增高、通风线路变长、阻力越来越较大,井下风量调节困难、增风不易等问题等问题,需要更换矿井主要通风机来解决。在矿井通风阻力技术测定的基础上,根据更换主要风机的性能曲线,利用计算机模拟通风网络解算,确定了新风机挂网运行角度,分析并验证了通风系统运行情况和解算结果,保证了更换的新风机及井下通风系统运行稳定,取得了良好的效果。     

煤矿通风系统优化研究及应用

通风系统的设计关乎工作人员的生命安全,只有通风良好,保证矿井安全生产,才能保证煤矿井下的正常工作。基于此,分析了当前煤矿通风系统存在的问题,探讨了通风系统通风阻力的优化。     

热气溶胶灭火装置对风电机组火灾的灭火能力研究

近年来我国风电机组火灾事故频发,解决风机的消防安全问题迫在眉睫。文章建立了国内首套风电机组火灾模拟试验装置,并且试验测试了热气溶胶灭火装置在非通风和通风条件下对风电机组火灾的灭火能力。试验结果表明:热气溶胶灭火装置能够对风力发电机组进行全淹没灭火保护,灭火药剂的用量应考虑风机工作运行中的实际通风情况。热气溶胶灭火装置宜与通风系统实现联动控制,只有在通风系统关闭后,才能启动灭火;若无法实现联动,为了保证灭火浓度,需增加药剂用量以补偿药剂损失。     

带有机力通风冷却塔的机组冷端优化研究

带有机力通风冷却塔的机组冷端优化需要考虑冷却塔的能耗,热力性能受大气参数的影响较大.为了研究以大气参数为边界条件的冷端系统最佳的运行方式,以带有逆流式机力通风冷却塔的发电机组为对象,对机力通风冷却塔和凝汽器进行变工况分析,寻求冷端系统优化后的机组最小供电煤耗率.结果 表明:当3台循环水泵和5台风机运行时,机组供电煤耗率...     

宝钢焦化废水处理站风机节能改造工程设计

1概况 宝钢焦化废水处理站设计能力为160m3/h,1997年建成投产。生化部分好氧池深11.67m、风机设计气水比为57：1。曝气风机采用罗茨风机,出口风量Q=4590m3/h（20℃,1个大气压,相对湿度70%,以下称标准状态）,采用两级增压,出口压力P=147kPa,配套电机N=220kW（3kV）,正常工况风机2用2备,系统受到冲击时风机3用1备。风机已运行14年达到使用年限,目前存在以下问题：     

煤矿通风系统运行与维护优化

通风系统在煤矿安全与生产中扮演着重要角色。此次研究旨在探讨如何优化通风系统的运行与维护,以提升煤矿安全性和生产效率。通过分析通风系统的运行特点、存在的问题及其影响,提出了维护策略与优化方法,并结合实际案例进行了验证。研究发现,周期性维护与数据驱动的优化是提升通风系统性能的有效途径,而优化策略的实施能够显著改善通风效果,降低事故风险,提高生产效率。研究为煤矿通风系统的优化提供了有益的理论指导和实践经验,对煤炭行业发展具有重要意义。     

半罗山煤矿208采区通风系统改造方案

针对半罗山煤矿208采区通风系统存在的问题，提出解决208采区通风系统不完善、局部通风困难、地温高等问题的2个改造方案进行比较，通过优化实施，有力地保障了该采区通风需求及通风安全。     

过渡季节抽水蓄能电站地下厂房排风设施布置方式数值模拟

抽水蓄能电站地下厂房通风效果对电站的安全高效运行具有重要意义。为研究内蒙古赤峰抽水蓄能电站地下厂房的通风效果,建立了地下厂房总排风机地上与地下两种布置方式的数值计算模型,通过与模型试验进行对比,验证了数值计算方法的可靠性。进而对比研究了总排风机两种布置方式的数值模拟结果,发现地下式总排风机房布置方式对厂房内的空气流通驱动作用较大,沿程损失较小,与地上式总排风机房布置方式相比,排风效果更佳。     

Hydrogen risk analysis for a generic nuclear containment ventilation system

Hydrogen safety issue in a ventilation system of a generic nuclear containment is studied. In accidental scenarios, a large amount of burnable gas mixture of hydrogen with certain amount of oxygen is released into the containment. In case of high containment pressure, the combustible mixture is further ventilated into the chambers and the piping of the containment ventilation system. The burnable even potentially detonable gas mixture could pose a risk to the structures of the system once being ignited unexpectedly. Therefore the main goal of the study is to apply the computational fluid dynamics (CFD) computer code – GASFLOW, to analyze the distribution of the hydrogen in the ventilation system, and to find how sensitive the mixture is to detonation in different scenarios. The CFD simulations manifest that a ventilation fan with sustained power supply can extinguish the hydrogen risk effectively. However in case of station blackout with loss of power supply to the fan, hydrogen/oxygen mixture could be accumulated in the ventilation system. A further study proves that steam injection could degrade the sensitivity of the hydrogen mixture significantly.     

Analysis of the hazards for the molten cuprous chloride pouring operation in an industrial hydrogen production facility

An analysis is reported of a design for a local exhaust ventilation system for the molten cuprous chloride pouring station in an industrial plant. Heat recovery from molten cuprous chloride is a key process within the copper–chlorine (Cu–Cl) cycle of thermochemical water splitting for hydrogen production. Because of particulate matter, dust, and vapors emitted by the molten salt, an effective and safe design is crucial. The design process involves calculating duct diameters to provide the desired duct air velocity through the system. The static pressure is evaluated so that the fan size can be determined. An adequate supply of makeup air must be provided to replace the air exhausted through the ventilation system. The economics of the ventilation system and ways to protect employee health, as well as minimize the costs associated with exhaust ventilation, are also described. Copyright © 2011 John Wiley & Sons, Ltd.     

Fan pressure-based testing,adjusting, and balancing of a ventilation system

Ventilation systems are responsible for the thermal comfort and air quality of indoor spaces. The adjustment of ventilation systems is a time-consuming task that may need multiple iterations. Incorrect adjustments of a ventilation system can reduce the quality of working and living conditions and degrade the energy efficiency of the ventilation. In this paper, a testing, adjusting, and balancing method for a ventilation system is presented that uses only the knowledge of the fan total flow rate and pressure. The method does not need additional instrumentation for the ventilation adjustment as the fan operating point can be estimated with the variable-speed drive. The method is noniterative, thereby saving time, and the ventilation system is adjusted to its minimum energy consumption setting without compromise in system operation. The proposed method is assessed with a laboratory test setup to verify the correct operation of the method in practice.     

矿井风机智能化监控系统的研究与设计

井下通风关乎煤矿生产的安全,如何保证通风系统运行的持续性、稳定性、可靠性,是提高煤矿自动化与现代化水平的重要内容之一。设计了1套矿井风机智能化监控系统,通过对井下风机给风量、转速、轴温等运行状态的实时监测,将数据传输到井下微机处理器,并将其筛选处理传到地面监控室,从而实现风机的智能化监控、节能高效运行。通过井下风机智能监控系统,可有效延长风机的使用寿命,极大地提高煤矿的生产安全,对煤矿现代化建设具有很重要的意义。     

Numerical study of a hybrid ventilation system for single family houses

The main objective of this study is to develop and test hybrid ventilation systems and control strategies that are suitable for residential buildings. Two ventilation systems were modelled: a mechanical extract ventilation system (called the reference system) and a hybrid low pressure ventilation system that can support two different types of demand control strategies (occupancy detection and CO₂ concentration). The newly developed models were assembled with the existing thermal models of the SIMBAD Building and HVAC Toolbox developed by the CSTB.A single family house located in Athens (Greece), Nice (France), Trappes (France) and finally Stockholm (Sweden) was considered as the case study. Yearly simulations were performed to assess the performance of the hybrid ventilation control strategies. The assessment criteria used are related to indoor air quality, thermal comfort, energy consumption and stability of control strategies. The results show that the low pressure ventilation system can improve the indoor air quality and reduce the fan energy consumption compared to the reference system while maintaining the same building energy consumption for heating.     

锅炉引风机改用调速型液力耦合器调节的经济分析

本文介绍热电厂引风机的几种调节方式，以员工锅炉引风机的改造为例，通过分析比较，得出结论，现阶段应用调速型液力偶合器调节是解决热电厂锅炉引风机经济运行的最有效方法。     

热管散热技术在小山电站励磁整流系统的应用

针对小山电站2号机励磁系统冷却方式存在的若干问题,对现有励磁冷却方式进行改进,采用热管冷却方式,风扇作为备用。从热管冷却的优点进行了分析比较,通过2号机的实际温升试验,进一步阐明了采用热管技术既简化了冷却风机操作及维护,减少了噪声,也提高了设备的可靠性。