天津市油制气调峰气源简介

在城市煤气供应中,用气负荷的不均衡性在不同程度上影响安全、稳定供气。一个完善的城市煤气供应系统,应具备季节(月)调峰及应急气源。重油蓄热催化裂解制造城市煤气(简称油制气)的调峰气源装置具有下述优点:(1)供气稳定可靠,开停灵活,负荷弹性大;(2)热值控制范围大,便于与其它类型煤气(如水煤气等)掺混,满足城市煤气供应要求;(3)工艺成熟可靠,技术先进,自动化程度高;     

各地燃气动态

安徽省淮南市燃气二期工程正式拉开序幕 为提高燃气热值,缓解城市大气污染状况,更好地为用户服务,淮南市燃气总公司在成立一周年之际,投资数万元,在田东制气一厂新建了一套小型液化石油气掺混装置,从1999年4月2日起每日在生产的煤气中掺入一定比例的液化石油气。至此,全市3万多燃气用户已全部用上了煤气液化石油气掺混气。这标志着淮南市燃气一期工     

CNG混空气掺混弛放气作为调峰气源的应用

针对晋城市管道煤气的气源供应问题,指出了CNG混空气与原有弛放气掺混方案,对掺混工艺流程作了介绍,并对掺混气技术的可行性进行了论述,从而确保安全稳定供气,解决了城市燃气过渡期间的供气、调峰问题。     

重油制低热值煤气掺混LPG效率的评估

根据实际情况，通过推导，得出了低热值油煤气掺混ＬＰＧ的效率计算公式。计算结果表明，在一定的重油气化效率之下，通过降低制气炉生产热值并掺混ＬＰＧ，以便达到既提高煤气产量，又提高总体气化效率的目的，从而为选择运行方式提供依据。     

上海城市燃气燃烧稳定性研究

以民用燃具燃烧器燃烧稳定性实验为基础，对上海市掺混天然气后的城市煤气与原人工煤气的火焰稳定性进行比较，提出了不稳定工况产生的原因和解决的办法。     

回收两段炉鼓风废气掺混液化气技术的研究

本文提出了两段炉制气回收废气掺混液化气技术，研究了回收工艺、掺混比例，掺混方式及在用民用煤气灶具的适用性，指出此工艺提出了煤气产量。     

简易液化石油气混空气装置

一、引言液化石油气(以下简称液化气)掺混空气技术作为城市煤气高峰的应急补充措施,是一种比较可靠的确保用气高峰手段。早在二十年代国外便应用了,并在1926年开始用于城市煤气工业中。目前美国最大的混气装置,其生产能力为30万m~3/d,其它国家如日本、法国、意大利、苏联等国,也都有这类混气装置,且自动化程度不断地提高。进入六十年代后,由于我国的石油工业得到飞速发展,东北地区也开始研究这项技术。锦州市煤气公司于1965年建成的日产1.2万m~3/d的混气装置,接着沈阳、长春、哈尔滨等东北城市相继采用液化气掺混空气     

"烟气发生器"尾气与焦炉煤气掺混供气总结

１引言常州煤气厂原设计是焦炉煤气掺混低热值发生炉煤气达到城市煤气质量要求,煤气低热值发热量＞１４．６３ＭＪ／,作外供城市煤气。目前由于供气规模不大,考虑到既能降低热值,又不增加经济负担的同时,我们提出了掺混废气的设想。因焦炉废气和锅炉废气含氧量高,掺...     

浅析出厂城市煤气热值偏差因素及防范措施

一、前言我厂出厂煤气,在一般情况下,是采用较稳定的焦炉煤气气源和水煤气气源按一定掺混比混和的工艺,热值达到15.910±0.419MJ/Nm~3的城市煤气要求。在实际生产过程中,影响出厂城市煤气热值波动的因素较多,从而导致煤气热值低出格(<15.491MJ/Nm~3)或高出格(>16.329MJ/Nm~3)。本文将对影响城市煤气热值偏差的因素及防范措施作一技术分析,不妥之处,望加以指正。     

液化石油气掺混空气替代甲烷化煤气的可行性

液化石油气掺混空气替代甲烷化煤气的可行性林棋棋陶春辉张云芬（南京市燃气工程设计院，南京２１０００９）某公司目前供应厂内生活区用煤气为甲烷化煤气，该煤气生产系统自投运以来，存在下列问题：（１）由于甲烷化制气工艺不成熟，设备故障频繁，生产不稳定；（２）甲...     

变压吸附技术应用研究进展

变压吸附技术由于具有能耗低、工艺流程简单、操作费用小等优点,广泛用于气体的分离和回收领域。介绍了变压吸附的原理及应用进展,特别是在炼油厂干气提纯回收、煤层气净化回收中的应用前景。提出了目前技术存在的问题和相应的解决措施,针对传统变压吸附剂存在的吸附量较低、气体回收率不高等缺点,阐述了以高表面活性炭为吸附剂的变压吸附在这些领域中的发展潜力。     

液化石油气混空气燃烧装置的控制与调节

介绍了在液化石油气与空气混合后，根据气压力低的特点，采用助燃压缩空气作为主动量对燃气进行均压控制，使两种气体压力相等，然后再与燃气比例混合。经过在大型冶金炉上的实践应用表明，该燃烧装置满足生产需要。     

充气混合在大型天然气球罐投产置换的应用

介绍几种天然气球罐投产置换方法,阐述天然气充气混合置换的流程。对球罐投产置换充气混合后的气质进行分析,指出当充气混合时,置换终点以控制氧气体积分数低于1.5%为宜。提出天然气充气混合的风险控制措施。     

燃气掺混装置及其应用

介绍了4种燃气掺混装置（文丘里引射式混合器、随动流量混合器、高压比例式混合器、配比式混合器）的混合机理及工艺流程,探讨了每种燃气掺混装置的特性及适用工况。     

基于火焰面积法的产气药剂燃烧稳定性研究

间歇性爆喷是非储压式干粉灭火装置使用时的常见问题,与产气剂配方、混合均匀程度和结构有关,而燃烧稳定性是影响产气剂燃烧效果的直接表现.基于一种产气剂配方,分别采用机械混合与冷冻干燥两种制备方法,利用高速摄影仪,对产气剂燃烧稳定性进行了研究.用扫描电子显微镜表征形貌,显示出冷冻干燥法在混合均匀度上明显优于机械混合.通过MA...     

液化石油气混空气工程技术问题的探讨

探讨了液化石油气混空气工程建设和运行中的技术问题———确定合理的混气比以满足互换性要求,气化器出口汇总管上设置积液缸,对引射的空气进行干燥处理,混气出口压力的合理确定,快速热水炉燃烧系统的改造等。     

Tracer gas dispersion in ducts—study of a new compact device using arrays of sonic micro jets

One of the most feasible ways to measure duct airflows is by tracer gas techniques, especially for complex situations when the duct lengths are short as well as their access, which makes extremely difficult or impossible other methods to be implemented. One problem associated with the implementation of tracer gas technique when the ducts lengths are short is due to the impossibility of achieving complete mixing of the tracer with airflow and its sampling. In this work, the development of a new device for the injection of tracer gas in ducts is discussed as well as a new tracer-sampling device. The developed injection device has a compact tubular shape, with magnetic fixation to be easy to apply in duct walls. An array of sonic micro jets in counter current direction, with the possibility of angular movement according to its main axle ensures a complete mixing of the tracer in very short distances. The tracer-sampling device, with a very effective integration function, feeds the sampling system for analysis. Both devices were tested in a wind tunnel of approximately 21 m total length. The tests distances between injection and integration device considered were: X/Dh = 22; X/Dh = 4; X/Dh = 2; and X/Dh = 1. For very short distances of X/Dh = 2 and X/Dh = 1, semi-empirical expressions were needed. A good reproducibility of airflow rate values was obtained. These preliminary tests showed that the practical implementation of tracer gas techniques in HVAC systems for measuring airflow rates with a very short mixing distance is possible with the devices developed.     

燃气管网抢修技术的研究

分析了天津城市燃气管网的运行现状,根据实际抢修工作的需要研制了燃气管网快速抢修设备,论述了燃气管网不停气抢修、停气抢修设备的结构、操作步骤及应用效果。     

Mixing in upflow anaerobic filters and its influence on performance and scale-up

Tracer studies were carried out in laboratory-scale and pilot-scale upflow anaerobic filters to determine the effect of liquid velocity, gas production and media depth on mixing patterns. A computer simulation model was developed to analyse tracer-response curves. In water studies at laboratory scale, gas production was shown to have a significantly greater effect on mixing than liquid upflow velocity. A reduction in the quantity of media also resulted in greater mixing due to the greater void space in which synthetic gas bubbles could cause turbulence. In the presence of sludge during reactor operation, at pilot and laboratory-scale, gas production had a significant influence on mixing. However, liquid velocity played an important role in solids distribution in the filter, in conjunction with media depth. At pilot-scale, at a low solids concentration, a high liquid velocity lifted the sludge “bed”, raising the source of gas production. The absence of gas below the sludge bed resulted in a plug flow regime which the incoming substrate entered. A reduction in the quantity of media increased the degree of mixing for a given liquid velocity and gas surface load. Lower liquid upflow velocities are required at a reduced media depth to prevent excessive biomass loss. Shear rates increase at high liquid and gas velocities, resulting in detachment of solids from the media and biomass washout. A close correlation was established between mixing and process performance which led to the development of a programme for start-up and operation of the filter to maintain optimum biomass/substrate contact. A strategy for scale-up was proposed through the development of correlations obtained from laboratory-scale filter studies which were used to predict pilot-scale mixing characteristics. This research highlighted the important factors influencing mixing patterns and scale-up in anaerobic upflow filters.     

低压气泡雾化的实验及数值模拟研究

为了进一步研究混合腔内部流场和参数最佳组合的两相流装置,设计了6 种不同结构的两相流雾化喷嘴,并实验测定雾滴粒径、雾滴轴向速度、雾化角和雾通量等相关雾化特性参数。在实验基础上,采用Fluent 模拟软件对混合腔内部的速度流场、压力流场和气液体积分数进行模拟分析,对实验结果进行补充与验证。得到雾化特性和灭火效果兼优的最优喷嘴的工作参数为：液体工作压力0.4 MPa,液体质量流量为60.0 kg/h,气体工作压力0.6 MPa,气体质量流量为0.1 kg/h,喷孔直径0.8 mm,注气孔数32 个。