共查询到19条相似文献,搜索用时 187 毫秒
1.
研制开发了一种降低催化裂化再生烟气SOx排放的助剂。研究了铈、钒等组分对脱硫性能的影响,得到了最佳的化学组成;开发了优化载体孔结构和连续动态浸渍活性金属的制备工艺,进一步提高了脱硫活性。工业应用结果表明,新开发的降低催化裂化再生烟气SOx排放助剂能有效减少SOx的排放,在添加2%左右(占总藏量)助剂时,再生烟气中SOx脱除率可达到70%以上,而对产品分布和主要产品性质没有明显的不良影响。 相似文献
2.
3.
随着炼油业的不断发展,助剂已经被应用于降低SOx、NOx和CO的排放。本文首先就烟气洗涤法与助剂技术进行了一定的比较,在此基础上分析了助剂脱除再生烟气污染物的基本原理,最后就其在工业上的应用做了分析。 相似文献
4.
5.
6.
为降低催化裂化烟气中SO_2和NOx排放量,中国石化济南分公司800 kt·a-1的FDFCC-Ⅲ重油催化裂化装置试用了FP-DSN三效助剂。工业应用结果表明,首先按反再系统催化剂藏量的2%加入三效助剂,然后每天按催化剂单耗的2%加入FP-DSN三效助剂,可使再生烟气SO2脱除率达到75.5%,NOx脱除率达到65.5%,同时具有较好的助燃效果,可停止加入铂基助燃剂。加入FP-DSN三效助剂后,液化气中丙烷和丙烯体积分数分别升高0.52个百分点和0.97个百分点,丁烷和丁烯体积分数分别下降1.11个百分点和0.35个百分点;干气、汽油和柴油等产品质量没有明显变化,同时FP-DSN三效助剂对产品分布无不良影响。 相似文献
7.
催化裂化是目前石油冶炼和二次加工过程中的重要环节,在生产过程中原油中的氮氧化物和硫氧化物等转变为气体、固体颗粒等污染物随催化裂化再生烟气一起排入大气中,造成了严重的大气污染。提出一种新的催化裂化烟气脱硫脱硝优化方法,在分析催化裂化再生烟气脱硫脱硝工艺原理和流程基础上,考察了某催化裂化装置和脱硫脱硝装置的实际投入运行状况和烟气净化效果均达到了预期效果,在此基础上为了更好地实现催化裂化烟气脱硫脱硝,选取符合环保要求、价格低廉、脱硫脱硝更彻底的三效助剂作为催化裂化助剂。经工业测试证明,三效助剂在试用标定阶段二氧化硫、三氧化硫和氮氧化物去除率分别达到了67.2%、88%和43.8%,且能够实现烟气脱硫脱硝减排优化。 相似文献
8.
9.
10.
11.
某催化裂化装置增设烟气脱硫设施后可实现外排烟气的环保达标,但是在实际运行中存在烟气脱硫设施吸收浆液循环量波动大和碱液消耗量大的问题。通过使用CSC硫转移剂,在催化原料性质基本不变的条件下,催化再生烟气中的SO2浓度大幅度下降,极大缓解了烟气脱硫设施的脱硫压力,不仅降低了烟气脱硫设施的运行成本,而且减缓了设备的腐蚀和结垢,有利于装置长周期运行。同时使用CSC硫转移剂对装置产品分布和产品收率无不良影响。 相似文献
12.
13.
14.
烟气轮机是催化裂化装置的关键设备,烟机结垢是影响装置长周期运行的关键因素。烟机结垢是多方面因素综合作用的结果,与装置的操作条件和催化性质剂密切相关。针对催化裂化装置烟机结垢,分析了催化剂在全周期循环过程中的性质变化。在催化裂化过程中,催化剂粒径显著减小,进入烟机的催化剂粉尘是导致烟机结垢的直接原因,沉积在催化剂表面的金属元素为催化装置烟机结垢提供了物质基础,进入烟气轮机中的催化剂粉尘经过水蒸气、高温烧结等作用,使催化剂粉尘在烟气轮机中的粘连,并不断沉积,最终结垢。 相似文献
15.
16.
17.
Performance with Respect to Flue Gas Composition of a Combined Desulfurization/Denitration Process Using Powder-Particle Fluidized Bed
下载免费PDF全文
![点击此处可从《中国化学工程学报》网站下载免费的PDF全文](/ch/ext_images/free.gif)
A new combined desulfarizatinn/denitraticon (DeSOx/DeNOx) procees was teeted in this study. The procees uses the so-called powder-partlcle fluidized bed (PPFB) as the major reactor in which a coarse DeNOx catalyst, several hundrsd micrometers in size, is fluidized by flue gas as the fluidization medium particles while a contlnuogsly supplied fine DeSOx sorbent, several to tens of micrometers in dianteter, is entrained with the flue gas. Ammonin for NOx reduction is fed to the bottom of the bed, thus, SOx and NOx are simultaneously removed in the single reactor.By adopting a model gas, SO2-NO-HaO-N2-air, to simulate actual flue gas in a laboratory-scale PPFB, simultaneous SO2 and NO removals were explored with respect to various gas components of flue gas. It was found that the vaxlations of SO2 removal with concentrations (fractions) of oxygen, water vapor, SO2 and NO in flue gas are little affected by the simultaneous NOx reduction. However,the dependencles of NO removal upon such gas components are clveely related to the inter-actions between DeSOx sorbent and DeNOx catalyst. 相似文献
18.
Characteristic process parameters and variables in catalytic fluidized bed cracking . Catalytic fluidized-bed cracking occupies a distinctive position among the various conversion processes. With regard to its favorable product range, the process is characterized by low processing costs coupled with flexibility of raw materials. A number of independent process parameters are available for control of the reactions involved in catalytic cracking and for influencing the product range. The cracking reactions taking place and the interplay of the independent and dependent variables are described. Apart from the actual cracking process, particular importance attaches to the regeneration of the catalyst charged with coke since it has a decisive influence on the thermal economy of the plant. Depending upon the desired product yield or the raw materials a suitable catalyst must be chosen. Considerable progress has recently been made in catalyst development. 相似文献
19.
Ekkehard Richter 《化学工程与技术》1990,13(1):101-112
The BF-Uhde-Mitsui Process uses active coke for SO2- and NOx-removal from flue gases in the temperature range between 100 and 190 °C, Experimental methods of thermal regeneration were applied to the evaluation of the state of the adsorbent after use in flue gas cleaning and of the parameters for disrober design. A reaction model was derived from experiments carried out in differential and back-mix reactors. The parameters were evaluated by adaptation of the model to the adsorption spectra. The model was successfully applied to the regeneration of active coke in a fluidized bed reactor. 相似文献