浅析煤气锅炉空预器阻力上升的原因及解决措施

中南股份1号高温超高压煤气锅炉在投产稳定运行1 a后，出现空预器阻力异常上升，影响锅炉运行。组织相关技术人员分析原因后，判断主要为脱硝系统在运行时未能严格控制“氨逃逸”现象，硫酸氢铵在空预器聚积，造成空预器堵塞，从而影响烟气流通面积导致空预器阻力上升。针对空预器堵塞现象进行了高压水内部清洗，清洗后空预器阻力恢复正常，锅炉恢复正常运行。     

中压锅炉的静置浸泡清洗

本文根据实践经验，概述了中压锅炉静置浸泡的清洗方法，指出了定期清洗是弥中压锅炉水处理和锅炉系统不足，保证其安全运行的重要手段。     

硝酸清洗锅炉技术探讨

本文对使用硝酸清洗锅炉时如何控制硝酸液在清洗液中的浓度、缓蚀剂浓度、，以及根据水垢成份不同使用哪些酸清效果更好等问题进行了探讨。大量的实验证明，硝酸液加兰－５缓蚀剂适清洗以钙镁盐类为主要成份的水垢及有合金钢材质部件的锅炉。且清洗后设备要做化处理。     

天铁集团CCPP工程次高压锅炉的化学清洗

天铁集团50MW级燃气——蒸汽联合循环发电(CCPP)工程配套的余热锅炉(HRSG)为卧式、双压(6.1MPa、1.1 Mpa)无再热、自然循环汽包炉。该锅炉投入使用前,按要求需要对其高压水系统、低压水系统和除氧器系统进行化学清洗。本文以高压水系统的化学清洗为例,给出了合理的锅炉化学清洗的工艺方案,确定了化学清洗所使用的药剂浓度和钝化工艺,对实际清洗操作过程进行了介绍。经评估确认清洗效果达到了相关要求。     

高压锅炉EDTA化学清洗实践

介绍了运行锅炉采用EDTA化学清洗的实践过程,包括化学清洗范围、清洗工艺、清洗参数等的确定,分析了锅炉采用EDTA化学清洗的优缺点。     

化学清洗在电厂锅炉中的应用

阐述了电厂锅炉化学清洗的必要性及基本原理，介绍了化学清洗工艺条件的选择和过程的实施、关键步骤的分析监督以及化学清洗效果的评价。     

浅谈清洗铁中毒的离子交换树脂的方法

通过对中毒离子交换树脂的分析，证实离子交换树脂被铁化物污染是导致离子交换树脂交换能力有所下降主要原因。制定了酸洗方法，先后对6台交换器进行清洗，清洗后离子交换树脂交换能力有所提高，达到锅炉安全运行的目的。     

FG-600余热锅炉的化学清洗实践

介绍了马钢第一烧结厂石灰回转窑余热锅炉化学清洗的全过程,并着重叙述了锅炉结垢的危害,以及化学清洗的工艺条件、过程控制和清洗效果。     

干熄焦锅炉在线清洗引起频繁爆管分析

介绍了一台干熄焦高温高压锅炉在线清洗引起频繁爆管的现象、原因分析和解决方法,指出了锅炉在线清洗的副作用。     

浅谈高温高压锅炉化学清洗过程

锅炉的化学清洗,要求能除去新建锅炉在轧制、加工过程中形成的高温氧化轧皮以及在存放、运输、安装过程中所产生的腐蚀产物,焊渣和泥沙污染物等.锅炉化学清洗后,在金属表面形成一层致密的化学钝化膜,钝化膜可以有效的防止污垢的产生,并且能有效的对锅炉进行保护.在机组启动期间改善汽水品质,减少机组排污及启动时间.实践证明,开车前的化学清洗和钝化对生产的安全和经济效益有重要的意义.     

熔炼次数对M17返回料合金成分、组织和性能的影响

实验结果表明,M17铸造高温合金(%:0.16C、8.79Cr、5.79A1、4.93Ti、3.29Mo、15.20Co、0.78V、0.015B、0.073Zr、0.002S、0.001P、0.001 1O、0.001 0N)经25 kg真空感应炉返回重熔后,Si含量随重熔次数的增加而略有增加,合金中主要元素和其它杂质元素S、P、H的含量变化不大,而氧、氮略有增加;合金中初生碳化物由新合金中的草书体逐渐向返回合金块状转变,初生碳化物的遗传性堵塞合金凝固时的补缩通道,使返回料合金的疏松倾向增大,高温塑性下降较大。     

China's Major Non-ferrous Metals Imports & Exports

正~~     

Zinc Production by Province in 2014

正~~     

80% of Chinese Firms Purchasing Overseas Mines Ended up in the Red

<正>Minmetals Resources acquired the world’s largest copper mine under construction for USD5.85 billion.One after another,listed companies Jien Nickle,China Molybdenum and Chihong Zinc and Germanium raised money to get involved in overseas mining projects…SOEs and private enterprises are engaged in a frenzy of overseas mine purchasing.A reporter with Economic     

Copper Processing Profit Dropped Sharply,Copper Consumption Will Face Impact in the Second Half of the Year

正Judging from China’s copper consumption field,the biggest consumption unit is electric power,which accounts for 47%of total consumption;it is followed by light industry sector,including household electrical appliance,machinery,durable goods and hardware etc,which accounts for 22%of total consumption;followed by transportation field,     

Central Geological Prospecting Fund Newly Added 16.47 Million Tonnes of Bauxite in 2013

正In 2013,the Central Geological Prospecting Fund(CGPF)Project newly discovered 15 ore fields,including 3 large above ore fields,and 5medium sized ore fields.The reporter learned from the recently published"Annual Report of Central Geological Prospecting Fund Project(2013)"that,from 2006 to 2013 the CGPF     

Manufacturers of Copper Tube for Central Air Conditioner Use Face Mounting Pressure in the Final Quarter of the Year

正This year,the investment growth rate of real estate industry continued to slow down,sold area of commercial housing also dropped significantly,which brought huge pressure to the domestic air conditioning manufactures.In the first half of the year,by relying on high growth in national financial expenditure,along with investment in public infrastructure     

Xinjiang Ranks No.1 in Production of Primary Aluminum in China

正Kang Yi,Honorary Chairman of China Nonferrous Metals Industry Association,said recently at the Forum on Development of the Non-ferrous Metals Industry in Central and Western China held in Zhengzhou that,as more and more electrolytic aluminum factories in Xinjiang came into operation,the electrolytic aluminum output of Xinjiang had reached2,275,000 tons in the first 7 months this year,     

Shenhuo Coal Industry and Electricity Power Completed800,000 t/a Aluminum Project in Xinjiang

正"Xinjiang project has been completed according to schedule,but total completion and total start of production are two different concepts,after completion it still needs a gradual process of reaching production target."On the morning of November 3,Shenhuo Coal Industry and Electricity Power told investors the above statement on the investor interaction platform.     

Guangdong Metal Transaction Center has Become the Second Largest Precious Metal Transaction Platform Nationwide

正The reporter learned from Guangdong Province Precious Metal Transaction Center that in 2013the Center maintained healthy development momentum,and had become the second largest precious metal transaction platform in China in terms of market size;currently Guangdong is quickening steps of financial innovation for the Center,aiming to build a transaction center with international core competitiveness.