Process Optimization of Coke Oven Gas to Methanol Based on the Downgrade of By-Product Steam

In the coke oven gas to methanol(CTM) process, boiling water(above 200 ℃) is generally used as the coolant in the methanol synthesis reactor, and thus, medium-pressure steam is generated as a by-product. In this paper, the influence of the coolant temperature on the CTM process is investigated from two aspects, which are the performance analyses of the reactor and the overall process and the energy integration of by-product steam. The results reveal that the coolant temperature plays a key role in the CTM process optimization. When the coolant temperature is reduced to 187 ℃, though low-pressure steam is generated, the techno-economic performance of the whole process is greatly improved: the energy/exergy efficiency is increased by 4-9%, energy cost is saved by 37.1%, income is increased by 5.4 M$/year, and the C02 emission is reduced by 21.3%.

Sensitivity analysis of a methanol and power polygeneration system fueled with coke oven gas and coal gas

The sensitivity analysis of a polygeneration energy system fueled with duo fuel of coke oven gas and coal gas is performed in the study,and the focus is put on the relations among syngas composition,conversation rate and performance.The impacts of the system configuration together with the fuel composition on the performance are investigated and discussed from the point of cascading utilization of fuel chemical energy.First,the main parameters affecting the performance are derived along with the analysis of the system configuration and the syngas composition.After the performance is being simulated by means of the Aspen Plus process simulator of version 11.1,the variation of the performance due to the composition of syngas and the conversion rate of chemical subsystem is obtained and discussed.It is obtained from the result that the proper conversion rate of the chemical subsystem according to the specific syngas composition results in better performance.And the syngas composition affects the optimal conversion rate of the chemical subsystem,the optimal point of which is around the stoichiometric composition for methanol production(CO/H_(2)=0.5).In all,the polygeneration system fueled with coke oven gas and coal gas,which can realize the reasonable conversion of syngas to power and chemical product according to the syngas composition,is a promising method for coal energy conversion and utilization.

焦炉气和高炉气合用制甲醇再产乙烯的新工艺

焦炉气和高炉气合用制甲醇再产乙烯新工艺,以钢铁企业现用作燃料和发电用的焦炉气与高炉气为原料,采用国内开发的焦炉气高温非催化转化工艺制取合成气,可在高压转化压力下等压合成甲醇,省去了合成气压缩机。合成的甲醇再采用我国自主开发并已工业化生产的煤制甲醇生产烯烃的新技术。建议把山东齐鲁石化已停产的渣油为原料的生产能力10×104t/a的等压合成甲醇装置,改造成以焦炉气为原料的生产能力为25×104t/a的甲醇生产装置,甲醇再进一步生产10×104t/a乙烯、丙烯。以此作为示范装置建在攀枝花钢铁公司。示范成功后可进一步放大到50×104t/a甲醇系列生产装置和20×104t/a乙烯、丙烯配套生产装置并在全国推广。经济技术分析表明,25×104t/a甲醇生产装置投资2.5亿元,投资回收期约为2年,10×104t/a乙烯、丙烯生产装置投资14.5亿元,投资回收期不到3年。

焦炉煤气制甲醇造气工序碳转化率计算分析

碳转化率高低将直接影响粗甲醇产量,文章通过计算某企业造气工序碳转化率,简要提出增加甲醇产量的方法。

焦炉煤气制甲醇装置中地面燃烧器的改造

通过对焦炉煤气制甲醇装置中的地面燃烧器进行改造,避免了弛放气管道超压,同时使泄漏的排放气实现全部回收,从而提升了甲醇产量。

介休市某焦炉煤气制甲醇技改项目职业病危害因素的检测与评价

目的检测、评价介休市某焦炉煤气制甲醇技改项目职业病危害因素及防护措施效果。方法采用现场调查和检测检验相结合的方法,进行定性和定量评价。结果项目存在粉尘、噪声、高温和热辐射、工频电场、全身振动、紫外辐射、手传振动、化学物质等职业病危害因素。检测结果显示粉尘检测符合职业接触限值。物理因素的检测中噪声和工频电场的检测结果有部分超标。噪声危害主要集中在锅炉风机、空分设备、焦炉气压缩等,超标的主要原因是锅炉一次风机、二次风机等设备运行时产生了高强度的噪声,空分设备运行时压缩气体造成了高强度的气流噪声。工频电场超标处为110KV变电站处。化学物质检测均符合职业卫生限值。结论车间针对粉尘、化学物质、高温和热辐射、全身振动、手传振动、紫外辐射采取了有效的控制措施,但针对噪声和工频电场的职业病危害控制措施还需进一步完善。