共查询到20条相似文献,搜索用时 109 毫秒
1.
2.
1 装置存在的主要问题 哈尔滨气化厂CO变换装置由于粗煤气中携带水、粉尘、焦油等杂质导致换热器很快堵塞和结焦,影响了传热效果,同时变换炉阻力增大,催化剂活性下降,缩短了催化剂的使用寿命,浪费了中压蒸汽。因此,给生产带来了许多困难,影响了整个装置的有效运行。 相似文献
3.
讨论了粗煤气变换工段换热器经常堵塞及预变炉触媒活性降低、影响触媒寿命等问题,提出了在径流洗涤器后加旋风分离器和高效气体过滤装置两极串联的改进方案,改造后,缓解了换热器堵塞的问题,延长了触媒寿命。 相似文献
4.
我厂烘干矿渣、炉渣等物料的~#1烘干机为φ2.4m×18.35m直接传热顺流式回转烘干机(设计产量14~25t/h),实际产量为20t/h。该烘干机采用二级除尘,其中一级为2台并联的φ1410旋风除 相似文献
5.
煤气炉是固体燃料气化的重要设备,气化所产生的煤气中夹带粉尘高达3~5g/m^3,必须除去,否则,会堵塞设备及管道。除尘设备一般有旋风除尘器及电除尘器。电除尘价格昂贵、投资大、成本高,一般的化肥生产企业根本无力投资,大多采用旋风除尘器(即燃烧室底部除尘器及烟 相似文献
6.
我公司Φ3m×20m原料烘干机为二级除尘,一级采用八管旋风除尘器,二级采用GW20m2卧式高压静电除尘器。由于除尘器结露腐蚀导致内部构件更换频繁,维护工作量大,除尘效果差。我们从改变除尘器内部构件的材质、提高入除尘器温度、做好保温等几方面对其进行改造,取得了良好的效果。1 相似文献
7.
8.
介绍了我公司对石灰车间原有灰仓除尘装置的改造情况。改造后的装置运行效果良好,灰仓室内空气含尘量由改造前的350 mg/m3下降到7 mg/m3,不仅达到环保要求,且年回收生石灰粉1 820 t。 相似文献
9.
本文介绍了适合中小光气厂煤气除尘用的旋转洗涤器,实践证明行之有效。 相似文献
10.
我公司年产20万t立窑水泥生产线配套的生料磨为Φ2.2m×5.5m。磨尾除尘系统采用旋风除尘器与电除尘器串联。该系统设备属于20世纪80年代产品,设计上存在诸多不合理之处,加之使用时间较长,除尘效果每况愈下,粉尘超标排放。针对这种情况,公司于2002年元月份对其进行了改造。1存在的问题1)旋风除尘器该除尘器为双筒式结构,电动机功率7.5kW,由于管径较细(d=350mm),系统阻力大。尤其是冬季,粉尘含水量在4%左右,经常管路被粉尘堵塞,磨内通风不畅,过粉磨、涨磨现象时有发生,磨机产量仅为8.7t/h。2)电除尘器电除尘器电场设计不合理,截面积较小(3.2m… 相似文献
11.
曹映平 《化学工业与工程技术》2000,21(5):32-33
介绍了挥发窑烟气、烟尘的性质 ,分析了烟气收尘工艺存在的缺陷。新建挥发窑系统用废热锅炉代替U型表面冷却器 ,用电收尘器代替布袋收尘器 ,使进入收尘器的烟气温度得以提高 ,系统阻力减少 5 0 % ,风机功率消耗降低。 相似文献
12.
Shaozeng Sun Yijun Zhao Fengming Su Feng Ling 《Korean Journal of Chemical Engineering》2009,26(2):528-533
The experimental results of air gasification of rice husk in the cyclone gasifier were presented at the fuel rate of 20.1
kg/h. With the equivalence ratios varied in the range of 0.21–0.32, the heating value of the producer gas decreases from 6.98
MJ/Nm3 to 3.11 MJ/Nm3 and the cold gas efficiency decreases from 64% to 31%. However, the tar content in the prouder gas decreases with the increase
of the equivalence ratio. The rice husk and ash were examined under a scanning electron microscope (SEM) and energy dispersive
X-ray (EDX) elemental analysis. The outer surface of the fuel particle which is of scale structure does not change basically
during the gasification. The pyrolyzed gas is mainly released from the inner surface of the fuel particle.
This work was presented at the 7
th
China-Korea Workshop on Clean Energy Technology held at Taiyuan, Shanxi, China, June 26–28, 2008. 相似文献
13.
An inverted cyclone gasifier and secondary cyclone combustor have been developed for use in a biomass fired small-scale cogeneration plant. The gasifier was designed with a vortex collector pocket (VCP) and a central collector pocket (CCP) to maximise particle and ash separation from the flow, and remove alkali and other heavy metal traces that agglomerate with the ash particles. The gasifier design was robust and suitable for firing with varying input conditions. The gasifier exhaust gas is suitable for directly firing into the secondary cyclone combustor without any complex hot gas clean up systems. The cyclone combustor produces a strong swirling flow with good mixing and burnout patterns, creating stable combustion conditions. The use of an additional VCP situated before the combustor exit removes the need for additional cyclone separators. An exhaust mounted tangential off-take on the combustor reduces pressure drop across the system and gives near uniform exhaust velocity profiles. The gasifier achieved 98–99% burnout with good separation/retention rates and 50% alkali, Na and K removal. A good quality low calorific value (LCV) gas was produced that could be effectively utilised in the cyclone combustor. The cyclone combustor produces a stable flow, with good mixing and burnout rates, and uniform exit conditions and could be operated in a lean mode to minimize NOx. The additional use of a VCP removed particles above 5 μm, as specified by turbine inlet conditions. The gas was suitable for directly firing into the gas turbine. Low pressure drop was found across the system. 相似文献
14.
15.
16.
17.
18.
介绍了恩德粉煤气化装置空心洗涤塔的技术改造方案及其工艺设计计算过程;改造后的运行效果表明,出水温度由60℃降低到48℃,空心洗涤塔连续运行时间由不到60天增加到100天。 相似文献
19.