CFB锅炉添加石灰石脱硫对燃烧产物计算的影响

循环流化床锅炉添加石灰石脱硫不可避免地对锅炉性能产生一定影响,本文定量分析了添加石灰石脱硫后锅炉性能计算中燃烧产物计算的新方法,并通过实例分析总结出至关重要的影响因素。     

循环流化床锅炉添加石灰石脱硫对性能设计的影响

循环流化床锅炉添加石灰石脱硫不可避免地对锅炉性能产生一定影响,定量分析了添加石灰石脱硫后锅炉性能计算中燃料产物计算的新方法,并通过实例分析总结出至关重要的影响因素。     

添加石灰石脱硫对CFB锅炉热效率的影响

循环流化床锅炉添加石灰石脱硫是其优点之一,它具有脱硫效率高,脱硫成本低,操作简单、无水污染等特点。通过实例分析总结了循环流化床锅炉添加石灰石脱硫后对锅炉热效率的影响。     

添加石灰石脱硫对CFB锅炉热效率的影响

瑞平热电厂循环流化床锅炉因故停加脱硫石灰石,锅炉的热效率有所提高。分析脱硫石灰石的添加对锅炉热效率的影响。结果表明瑞平热电厂石灰石添加比例偏高、石灰石颗粒偏大和一次风、二次风分配不合理是热效率不高的主要原因,指出今后的改进措施。     

加石灰石对220t／h循环流化床锅炉脱硫影响的研究（一）

1 综述。循环流化床锅炉添加石灰石脱硫是其特殊优点之一，它具有脱硫效率高，脱硫成本低，操作简单、无水污染等特点。本文概要介绍了杭州协联热电有限公司220t／h循环流化床锅炉的设计特点，主要系统结构，并通过对220t／h循环流化床锅炉性能测试的实例分析，总结加石灰石对220t／h循环流化床锅炉脱硫的影响。     

CFBB的低成本脱硫达标运行

循环流化床锅炉(CFBB)炉内添加石灰石脱硫具有脱硫效率好、成本低、操作简单、无水污染等特点.通过实例分析了企业在研究循环流化床炉内添加石灰石脱硫的原理和影响因素基础上,实现低运行成本脱硫达标方面所做的工作.     

流化床锅炉的脱硫运行

循环流化床锅炉添加石灰石脱硫是其突出优点之一，它具有脱硫效率高，脱硫成本低，操作简单、无水污染等特点。本文通过实例分析总结了循环流化床用石灰石脱硫的原理和影响因素。     

石灰石法炉内脱硫对锅炉热效率影响分析

通过石灰石脱硫改造实例对石灰石脱硫对锅炉的影响进行分析计算,得到各部分影响所带来的损失量所占比重,进而分析在不同钙硫比条件下,对锅炉热效率影响的变化趋势,以及两者之间的相互关系,为锅炉的减排改造提供借鉴意义。     

循环流化床锅炉脱硫试验分析

分析了不同Ca/S,煤质对循环流化床锅炉脱硫效率的影响及大量添加石灰石后对锅炉尾部静电除尘器的影响。     

考虑脱硫的电站温室气体排放计算模型改进

湿法脱硫(WFGD)工艺以石灰石作为吸收剂,制成石灰石浆液与烟气中的二氧化硫反应,生成的副产品为石膏。针对石膏—石灰石湿法脱硫对电站温室气体排放计算模型影响的问题,在燃烧方程的基础上重新建立计算模型。通过新的计算模型对采用石膏—石灰石湿法脱硫的燃煤电站锅炉CO2排放量进行计算分析。结果表明:新的计算模型适用于该电站锅炉CO2排放量的计算。由新的计算模型看出采用石膏—石灰石WFGD的燃煤电站锅炉要比采用干法脱硫的电站锅炉要多排放2(1-η)SO2的CO2,式中的η为烟气脱硫效率。针对该电厂锅炉进行计算,在机组负荷100%的情况下,二氧化碳每小时将多排放8.41t。     

石灰石在油页岩CFB燃烧中脱硫特性分析

石灰石作为脱硫剂,在油页岩CFB燃烧中能显著减少SO2的排放量,分析油页岩和石灰石特性及其脱硫机理的基础上,通过1 Mw的CFB试验台的试验研究,讨论了不同Ca/S和不同燃烧温度下石灰石对脱硫特性的影响.试验结果表明,温度在860℃左右,Ca/S为2.6时,SO2排放浓度能满足环保要求,而且脱硫效率较高.     

Study on the limestone sulfation behavior under oxy-fuel circulating fluidized bed combustion condition

In order to investigate the behavior of limestone sulfation under oxy-fuel circulating fluidized bed (CFB) combustion condition, experiments were conducted in a 50 kW oxy-fuel CFB system under the O₂/CO₂ and air combustion conditions. A small cage, containing limestone particles, was dipped into the dense zone of the CFB combustor during the experiments. The calcination of limestone, pore structure of the product layer, and calcium conversion were studied. It was found that the increasing of temperature would promote the calcination of limestone and the high concentration of CO₂ would inhibit calcination of limestone. The formation process of the product layer was completely different between the direct and indirect sulfation, while it was almost the same during the indirect sulfation under the oxy-fuel and air combustion. However, both the temperature and gas compositions played important roles in determining the pore structures of the product layer during the limestone indirect sulfation process. Under the O₂/CO₂ combustion condition, the calcium conversion of indirect sulfation was always higher than that of direct sulfation. The highest final calcium conversion after 60 min was found at 900 °C under the O₂/CO₂ combustion condition.     

石灰石脱硫反应对喷氨脱硝反应影响的实验研究

在循环流化床锅炉炉膛尾部或旋风分离器入口喷入氨气可以降低烟气中的NOx含量。在循环流化床锅炉中,为脱硫而加入的石灰石会影响喷氨脱硝反应。通过实验研究了石灰石热解产物和脱硫产物对喷氨脱硝反应的影响,发现石灰石的热解产物在脱硫前,比表面积较大,CaO对喷氨脱硝反应显示出一定的催化活性,能够促进喷氨脱硝反应;石灰石的脱硫产物,对喷氨脱硝反应影响较小,但在T>1 200 K以上时,能够促进NH3的氧化,降低NH3的逸出,对喷氨脱硝反应有利。     

循环流化床锅炉的燃烧脱硫试验研究

针对内蒙古1台75 t/h循环流化床锅炉进行了脱硫试验,根据现场数据分析了温度、粒度、升温速率及摩尔比等因素对循环流化床脱硫效率的影响.结果表明:在较小Ca/S摩尔比下,脱硫效率随时间增加呈上升趋势,随着Ca/S摩尔比增大,脱硫效率上升趋势减缓,且存在一个最佳的Ca/S摩尔比;加入石灰石脱硫时,需根据实际运行情况调节石灰石给料机的出力,以协调脱硫效率和锅炉效率之间的平衡.研究结果对循环流化床锅炉实际运行中SO2的排放和脱除具有预测作用.     

循环流化床锅炉性能计算及效率探讨

介绍了循环流化床锅炉性能计算采用国标GB1 0 1 84-88《锅炉性能试验规范》需进行的修正 ,石灰石投放量和燃煤消耗量无法精确计量时的试验和计算方法 ,并对提高CFB锅炉的效率进行了分析     

循环流化床锅炉高效脱硫技术研究

分析了我国大部分循环流化床（CFB）锅炉SO2排放不迭标的主要原因,研究了石灰石的脱硫活性,通过对CFB锅炉脱硫系统改造和炉内脱硫试验研究,结果表明,在入炉煤含硫量为2．00％、低位发热量为22．775MJ／kg的条件下,SO2排放浓度161．4mg／m^3,脱硫效率96．7％,二氧化硫排放能够满足国家和地方的排放要求。     

Co-combustion of refuse derived fuel with Korean anthracite in a commercial circulating fluidized bed boiler

The effect of co-combustion of Refuse Derived Fuel (RDF) with Korean anthracite on the combustion and environmental performance was observed in the Tonghae commercial Circulating Fluidized Bed (CFB) boiler. High contents of oxygen and CaO in RDF reduced the amount of air required for combustion and the limestone flow rate for SO₂ capture in the CFB boiler, respectively. The temperature in the furnace exit increased slightly due to re-combustion of volatiles which resulted in limiting the co-combustion ratio of RDF for the CFB boiler to operate stably. With the increasing co-combustion ratio of RDF, the output voltages of electrostatic precipitator (EP), which consists of 2-channels and 5-stages collecting plates, decreased linearly. Eventually, stability of the EP could not be maintained above 5% of the RDF co-combustion ratio. The emissions of NO_x, HCl and dioxin during co-combustion did not change appreciably as compared to the case when Korean anthracite was burnt alone, which were also low enough to meet Korean emissions limits. On the other hand, chlorine contents in ashes emitted from the CFB boiler increased gradually with the increasing co-combustion ratio, which implied that most of chlorines were fixed by limestone.     

440 t/h CFB锅炉污染物排放特性的试验研究

介绍了连州电厂440t／h CFB锅炉污染物排放特性的试验研究。探讨了添加石灰石后SO2的动态排放特性，分析了Ca／S摩尔比、床温、负荷、氧量和二次风率等因素对SO2和NOx排放的影响。提出了综合降低循环流化床锅炉污染物排放的措施。     

CFB锅炉炉内高效脱硫技术应用与运行管理

文中简述了某公司CFB锅炉采用的炉内脱硫系统工艺,对制约CFB锅炉炉内脱硫效率的石灰石选择、石灰石投入量和运行床温控制等进行了的总结,某公司的运行管理经验显示,这有助于CFB锅炉炉内脱硫系统的稳定运行和二氧化硫的达标排放,可为国内CFB锅炉机组提供借鉴。     

循环流化床锅炉石灰石系统介绍

本文对循环流化床锅炉的石灰石系统做了简要介绍,列举了常见的故障现象,深入分析了产生故障的原因,并在此基础上有针对性地提出了解决措施。