流化床锅炉水冷绞龙冷渣器的试验研究

在对水冷绞龙式冷渣器进行工业性运行和测试的基础上,分析了水冷绞龙中灰渣粒子的运行规律,给出了其灰渣输送量的计算公式,获得了其传热系数,并对灰渣输送及传热特性等进行了分析探讨,得到了一些有益的结论,为这种冷渣器的研究开发,设计完善和推广应用提供了重要的依据。     

典型循环流化床锅炉冷渣器及选型初探

介绍几种典型的循环流化床锅炉冷渣器,分析各自的优缺点,并进行技术经济比较,就冷渣器的评价、选型进行探讨.     

循环流化床锅炉冷渣器结渣分析

对风水联合冷渣器结渣现象进行分析,并提出改进意见。     

振动流化床冷渣器

本文介绍了适用于流化床锅炉高温灰渣冷却的振动流化床冷渣器的工作原理，结构特点和试验参数等     

分宜电厂100 MW CFB锅炉冷渣器系统的改造

对江西分宜发电厂100MW循环流化床(CFB)锅炉冷渣器运行初期出现的问题、原因及改造进行了介绍.     

循环流化床锅炉冷渣器的调整与改造

冷渣器是循环流化床锅炉的重要辅机之一,其作用是采用水或空气将循环流化床锅炉排出的900℃左右的高温灰渣冷却至200℃以下,回收一部分灰渣的物理显热,提高锅炉效率,它的正常运行直接影响到循环流化床锅炉的安全可靠和经济连续运行,而冷渣器能否维持正常排渣与冷渣器结构、设计有关外,也与运行人员的操作水平有关,故循环流化床锅炉的排渣系统运行不正常,故障率高是导致循环流化床锅炉不能带满负荷运行或被迫停炉的直接原因之一,针对梅县发电厂三期新投产的2台135 MW机组循环流化床锅炉排渣系统在运行中出现的问题进行分析及探讨,并提出了改造的实施方法。     

CFB锅炉冷渣器的分类与选型

根据近几年来循环流化床锅炉冷渣器的应用情况 ,着重从冷渣器的分类与选型原则 2个方面地行阐述 ,以期帮助用户选择出合理的炉底渣排放和冷却设备     

大型循环流化床锅炉冷渣器的运行故障及改进措施

循环流化床锅炉风水冷渣器运行存在主要问题及原因分析,并提出了改进措施。介绍和推选滚筒冷渣器,发展完善滚筒冷渣器有助于大型循环流化床锅炉安全可靠运行。     

CFB锅炉冷渣器及渣的热量回收

本文介绍了几种典型的CFB锅炉的冷渣器,并对各自的特点进行了比较,着重介绍了流化床式的冷渣器,就CFB锅炉底渣的热量回收问题进行了探讨。     

A cold model experimental study on the flow characteristics of bed material in a fluidized bed bottom ash cooler in a CFB boiler

IntroductionA fluidized bed bottom ash cooler is often used totreat high temperature bottom ash to reclaim heat andfine particles from the ash, and to have the ash easilytransported. Among the large CFB boilers in operation inthe world, there are many ash coolers that often workabnormally['-','].There are six fluidized bed bottom ash coolers in theimported 410im CFB boiler that was built and operatedin Gaoba power plant, Sichuan province, China in 1996N].High temperature slag-bond and jam …     

Influence of CFB (circulating fluidized bed) boiler bottom ash heat recovery mode on thermal economy of units

CFB (circulating fluidized bed) boiler bottom ash contains large amounts of physical heat. A BAC (bottom ash cooler) is often used to treat high temperature bottom ash to reclaim heat, and to have the ash easily transported. The unit thermal economic indicators of three CFB power plants in China were derived based on heat balance calculation and analysis on the principled thermal system in turbine heat acceptance condition, taking the influence of two different bottom ash heat recovery modes into account. One of the two bottom ash heat recovery modes was the FBAC (fluidized bed ash cooler) mode, and the other was the RAC (rolling-cylinder ash cooler) mode. The results indicated that two modes both improved the thermal economy of units. Compared with the RAC mode, the FBAC mode obtained higher plant thermal efficiency, lower plant heat rate and less standard coal consumption. The standard coal consumption rate of the FBAC mode was less nearly 2 g/(kW h) than the RAC mode in the three CFB power plants, when the net calorific power of standard coal was 29.27 MJ/kg.     

循环流化床锅炉排渣分选装置的冷态试验研究

在一个可视化冷态试验台上对新型排渣分选装置的气固流动特性进行了试验研究,试验结果表明：分选室和主床同时运行时,主床和分选室之间存在合理的压力分布以形成“主床-分选室-主床”的颗粒循环运动;初始床料特性对分选室分选效果有一定的影响;分选室分选效果随着流化风速比ξ的增大而变好。     

Experimental Study on an On—Line Measurement of High Temperature Circulating Ash Flux in a Circulating Fluidized Bed Boiler

A new kind of measuring method that may be used to measure high temperature circulating solid particles flux in a circulating fluidized bed boiler is studied in this paper. The measuring method is founded on the principle of thermal equilibrium. A series of cold tests and hot tests were carried to optimize the structure and collocation of water-cooling tubes and showed that the method had the advantage of simple, accurate, reliable and good applicability for on-line usage in a circulating fluidized bed boiler.     

循环流化床锅炉炉前给煤系统的改造

循环流化床锅炉在国内应用时间短,许多锅炉的炉前给煤系统设计不合理,给煤系统常出现故障,从而对锅炉运行造成较大影响.针对炉前给煤系统常出现的问题给出了改造方案,评价了改造效果.     

燃煤电厂循环流化床锅炉渣库粉尘防治措施

针对循环流化床锅炉渣库粉尘的防治,提出了其关键在于渣库库顶和渣库卸料口两处的抑尘措施,库顶可通过设置脉冲布袋除尘器和压力释放阀来解决粉尘问题,渣库卸料口可以设置喷雾除尘装置和改进卸料设备来抑制装车时产生的粉尘。     

循环流化床锅炉应用探讨

分析了循环流化床锅炉的循环过程，传热过程和传热影响因素。分析了循环流化床锅炉的技术特点和应用中存在的问题。重点对比分析了循环流化床和煤粉炉各项性能优劣。     

300MWCFB锅炉配套半干法烟气脱硫的汞排放试验研究

某300 MW循环流化床(CFB)锅炉采用炉内脱硫、SNCR、预电除尘器和烟气循环流化床半干法脱硫装置实现了超低排放。对不同工况下不同位置的烟气汞浓度和灰渣等固体副产物中的汞含量进行测试分析,研究结果表明:燃煤在循环流化床锅炉燃烧产生的汞主要以气态汞和颗粒汞形式存在;锅炉负荷提高,烟气中气态汞和颗粒汞浓度均有所提高,炉内脱硫对原始汞排放特性几乎没有影响;烟气循环流化床半干法脱硫装置可脱除71%～77%的气态汞和86%～88%的颗粒汞;采用预电除尘器与烟气循环流化床半干法脱硫结合的超低排放路线,总汞脱除率可达到82%～87%,使烟囱排放的汞浓度不高于1.5μg/m~3。副产物分析结果表明,烟气中脱除的汞主要富集于粉煤灰和半干法脱硫灰中。     

连州发电厂440t/h循环流化床运行存在的问题及对策

连州发电厂超高压中间再热循环流化床锅炉是广东省第一台135MW(440L／h)循环流化床锅炉。文章介绍了锅炉运行中存在的问题,通过采取相应对策和进行技术改进,取得了明显的改造效果。