局部增氧助燃技术及应用

一、引言 局部增氧助燃技术是我们经过十多年的国家重点科技攻关开发成功的适用于各种燃料和大多数工业炉窑的一系列高新技术,它是局部增氧技术和助燃技术两者的有机结合.     

膜法富氧局部增氧助燃技术应用于单元窑

由中国科学院大连化学物理研究所膜技术国家工程研究中心研究成功的膜法富氧局部增氧助燃技术于 2 0 0 3年 7月 2 1日首次在国内成功用于泰山玻璃纤维股份有限公司的单元窑 :平均节油大于 1 0 % ,而且产品产量和质量等明显提高 ,助燃风、大碹温度和排烟温度均大幅下降等。膜法富氧局部增氧助燃技术适用于各种燃料和大多数炉窑如马蹄焰窑、横火焰窑、油炉、链条炉、抛煤机炉、煤粉炉、焚烧炉、加热炉和热媒炉等 ,由于能提高产品产量和质量、显著节能、减少污染和延长炉龄等优点 ,曾通过北京市人民政府和中国科学院的联合鉴定 ,并被评为国家级…     

工业炉窑富氧燃烧技术的应用实践

在阐明富氧助燃节能技术的节能机理的基础上,分析工业炉窑能耗,介绍工业炉窑富氧燃烧技术的研究现状,并确定富氧气体来源选择。通过介绍某公司工业炉窑富氧燃烧技术的改造实践,分析改造前后节能效果对比,证明应用富氧助燃可获得明显的节能效果,有效减少大气污染,综合效益显著。     

局部增氧助燃技术及其在抛煤机锅炉中的应用

本文介绍了富氧燃烧、局部增氧助燃技术及其优点,并将局部增氧助燃技术应用到抛煤机锅炉中,取得经济效益.最后,我们提出了目前存在的问题.     

膜法富氧局部增氧助燃技术及其在燃油锅炉中的应用

在燃油锅炉中应用膜法富氧助燃节能技术可以使普通空气的含氧量从２０．９４％提高到２８％～３０％，富氧气通过富氧喷嘴进入炉膛局部增氧形成“气包油”的燃烧状态，以４ｔ燃油锅炉为例，锅炉热效率提高８．３％，燃油节约率１６．６４％，节能效果非常显著。     

通过能量平衡分析,探讨加热炉节能途径

通过热平衡和（火用）平衡计算,对连续加热炉进行综合热工分析,针对炉子用能的薄弱环节,提出利用局部增氧和高温空气燃烧等技术措施实现加热炉节能的新的思路.     

膜法制氧富氧助燃技术在干法水泥炉窑中的应用

针对膜法制氧富氧助燃技术在干法水泥炉窑上的应用实例,介绍了膜法制氧的节能原理、应用的安全性、使用寿命及在干法水泥炉窑的节能前景。提出膜法制氧富氧助燃技术是近代燃烧技术的新突破,可较好地解决窑炉燃烧中因缺氧导致热效率低下的问题,并减少有害气体的排出,实现了节约能源和保护环境。     

增氧燃烧的原理及其在热能工程中的应用

近几十年来，增氧燃烧已成为一种重要的燃烧技术，它被广泛应用以提高燃烧效率、增加产量、减少污染排放等。文章主要探讨增氧燃烧的原理及其在热能工程中的应用。     

局部增氧助燃技术应用节能环保的新进展

1引言因为能源越来越紧缺,而且环保要求也越来越严格,所以近年来局部增氧助燃技术在节能环保方面的应用也越来越广泛。这是一种适用于各种窑炉的专用富氧喷嘴和"对称燃烧"、"α型燃烧"、"S型燃烧"等与窑炉、产品和燃料匹配的高新集成技术。该技术不仅避免了整体增氧副作用多、投资巨大等缺点,而且所配富氧量非常少,仅为所需助燃风量的1%～5%,     

全国能源与热工2006学术年会纪要

“全国能源与热工2006学术年会”于2006年11月7-8日在湖南省张家界市举行。本次会议由中国金属学会能源与热工分会主办，东北大学、中南大学承办。来自全国各地企业界、高等院校和科研机构的202名代表出席了会议。会议围绕“节能降耗、技术创新，建设资源节约环境友好型钢铁工业”主题，分别进行了“工业炉窑热工与装备”与“节能环保与资源综合利用”会场报告，就过程工程系统节能、工业炉窑热工、资源节约与综合利用、余热回收与利用、清洁蓄热燃烧技术与装备等专题，进行了广泛交流与深入讨论。     

膜法富氧局部助燃技术在煤粉锅炉上的应用

利用膜法富氧技术,在150 t/h煤粉锅炉上进行了局部增氧助燃技术的工业试验.实验表明:膜法富氧局部增氧助燃技术的应用,有效地解决了炉膛结焦和高温腐蚀问题;大渣及飞灰可燃物含量降低,提高了低负荷不投油稳燃能力;提高了锅炉热效率;降低了NOx排放量.     

工业炉窑节能的思考

从燃烧、传热的角度出发,依据热工的基本原理,对工业炉窑热量损失的各种途径进行了分析,系统地介绍了工业炉窑进行节能、改造的方法,对提高工业炉窑的热效率,节约能源,保护环境有一定的指导意义。     

Investigation on combustion of high-sulfur coal catalyzed with industrial waste slags

With the exhaustion and deterioration of coal resource, a lot of research has been focused on improving the combustion efficiency all over the world, especially in China, in recent years. In this study, several industrial waste slags, which can decrease the ignition temperature, including the gasification slag, deactivated methanol catalyst and furnace slag, are reused as catalysts to improve the combustion efficiency of high-sulfur coal. The kinetic analysis of combustion reaction using Coats-Redfern's model indicates that the industrial waste slags could efficiently reduce the activation energy of coal ignition. By comparing and analyzing the composition of the waste slags with TG-DTG, XRD and XRF, the efficiency of combustion-supporting of the waste slags was confirmed and optimized.     

工业炉窑燃烧过程中节能减排问题的研究进展与发展方向

工业炉窑是建材、冶金、化工等流程工业中至关重要的用能装备,也是化石能源消耗和环境污染的主要源头之一.工业炉窑燃料中煤炭占70％,存在着能耗高排放大的问题,需要研发高能效低排放的新技术.对于典型的工业炉窑,其生产过程具有多工艺目标、多品种交叉生产,以及大负荷调节比、宽阈度负荷变化的复杂工艺特点.通过综述在节能管控、富氧燃...     

Heat flux estimation in an infrared experimental furnace using an inverse method

Infrared emitters are widely used in industrial furnaces for thermal treatment. In these processes, the knowledge of the incident heat flux on the surface of the product is a primary step to optimise the command emitters and for maintenance shift. For these reasons, it is necessary to develop autonomous flux meters that could provide an answer to these requirements. These sensors must give an in-line distribution of infrared irradiation in the tunnel furnace and must be able to measure high heat flux in severe thermal environments. In this paper we present a method for in-line assessments solving an inverse heat conduction problem. A metallic mass is instrumented by thermocouples and an inverse method allows the incident heat flux to be estimated. In the first part, attention is focused on a new design tool, which is a numerical code, for the evaluation of potential options during captor conception. In the second part we present the realization and the test of this “indirect” flux meter and its associated inverse problem. “Direct” detectors based on thermoelectric devices are compared with this new flux meter in the same conditions in the same furnace. Results prove that this technique is a reliable method, appropriate for high temperature ambiances. This technique can be applied to furnaces where the heat flux is inaccessible to “direct” measurements.     

Meeting emission standards with high-sulfur coals

The economics of strategies for meeting sulfur oxides (SO_x) emission standards from furnaces fueled with high-sulfur coals has been assessed based on published data. The strategy of SO_x control depends on how the coal is utilized. For large power plants, flue-gas desulfurization (FGD) is preferable to conversion of coal to clean fuel. In comparison with coal conversion, the total capital and operating costs for FGD are almost an order of magnitude lower, thermal efficiencies are higher, and utility requirements are lower. Even with possible breakthroughs in coal-conversion technologies, it appears that FGD will remain the economically preferred route to desulfurization. FGD has been in commercial operation since 1968, and the reliability of the process has reached an acceptable level. For industrial furnaces, direct combustion is preferred to gasification because gasification is inherently expensive. Fluidized-bed combustion is the only viable option for clean direct combustion of coal in small industrial furnaces. Fluidized-bed combustion has reached commercial status and is economically competitive in many parts of the world. For furnaces requiring gaseous or liquid fuels, gasification to medium-Btu gas is preferred. For domestic and commercial uses, coal can be gasified to clean, low-Btu gas. This is an old process and might be amenable to cost reduction through application of new technologies. The only other economically viable approach involves the production of clean solid fuel by compounding coal with additives such as limestone and manganese nodules.     

Experimental Studieson Gas－Particle Flows and Coal Combustion in New Generation Spouting－Cyclone Combustor

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Experimental studies on Gas—Particle Flows and Coal Combustion in New Generation Spouting—Cyclone COmbustor

Based on previous studies, an improved non-slagging spouting-cyclone combustor with two-stage combustion, organized in perpendicularly vortexing flows, is developed for clean coal combustion applied in small-size industrial furnaces and domestic furnaces. The isothermal model test and the combustion test give some encouraging results. In this study, further improvement of the geometrical configuration was made, a visualization method and a LDA system were used to study the gas-particle flow behavior, and the temperature and gas composition in combustion experiments were measured by using thermocouples and a COSA-6000-CD Portable Stack Analyzer. Stronger recirculation in the spouting zone and the strongly swirling effect in the cyclone zone were obtained in the improved combustor. The combustion temperature distribution is uniform. These results indicate that the improved geometrical configuration of the combustor is favorable to the stabilization of coal flame and the intensification of coal combustion, and it provides a basis for the practical application of this technique.     

工业炉用燃烧装置

概要地介绍了工业炉窑常用的气体，液体，固体燃料的燃烧方法，燃烧装置以及它们的特点。     

The inhibition effects of helium gas on liquid hydrogen droplets group combustion

With the rising interest in safety of liquid hydrogen (LH) combustion, a numerical simulation was conducted to investigate the “group” combustion of LH droplet arrays. Point source method (PSM) was employed to characterize the inhibition effects of helium on three specific LH arrays “group” combustion (binary, equilateral triangular, and five-particle arrays). The present study aims to contribute to the future development of helium inhibitor for LH combustion, providing detailed characterization of helium inhibition effects. It was found that the burning rate and flame temperature of all the three LH arrays decreased after adding helium to the air. In addition, both the H₂ volume fraction and temperature around the array surfaces decreased significantly. Moreover, flame location of arrays combustion became far away from droplet surfaces with helium dilution and it became more obvious as droplet numbers increasing. As a result, helium can be employed as a potential inhibitor for LH combustion.