焦炉煤气-甲醇产业链延伸技术方案的经济分析

与煤制甲醇和天然气制甲醇工艺相比,焦炉煤气制甲醇不仅可以有效利用焦炉煤气中的氢,而且具有低成本的优势。在焦炉煤气制甲醇工艺基础上,文中提出了3种具有发展潜力的焦炉煤气综合利用方案：①气化煤气-焦炉煤气制甲醇生产方案;② 焦炉煤气-乙炔-甲醇下游产品方案;③ 气化煤气-焦炉煤气-乙炔-甲醇下游产品方案。以200×10⁴ t焦炭的生产规模分析了3种方案经济性,其毛利润分别为24.21亿元,18.92亿元和28.74亿元;内部收益率分别为28.29%、24.34%和27.11%。气化煤气-焦炉煤气-乙炔-甲醇下游产品方案充分发挥了规模效应和产品高附加值的特点,具有明显的经济优势;系统灵活性高,抵御市场风险能力强。     

Desulfurization of coke by recycling COG in coking process

The technology of desulfurization of coke during coking is conceptually designed, in which the coking oven gas (COG) is blown into the coking chamber of the coke oven during the coking stage. Analysis based on laboratory experiments and computer simulation shows the possibility to reduce sulfur of coke by 0.2% by recycling 20% of COG. The technology may be an economic way to produce low sulfur coke or to produce metallurgical coke using high sulfur coal.     

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/H₂ = 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.     

Dry reforming of coke oven gases over activated carbon to produce syngas for methanol synthesis

The dry reforming of coke oven gases (COG) over an activated carbon used as catalyst has been studied in order to produce a syngas suitable for methanol synthesis. The primary aim of this work was to study the influence of the high amount of hydrogen present in the COG on the process of dry reforming, as well as the influence of other operation conditions, such us temperature and volumetric hourly space velocity (VHSV). It was found that the reverse water gas shift (RWGS) reaction takes place due to the hydrogen present in the COG, and that its influence on the process increases as the temperature decreases. This situation may give rise to the consumption of the hydrogen present in the COG, and the consequent formation of a syngas which is inappropriate for the synthesis of methanol. This reaction can be avoided by working at high temperatures (about 1000 °C) in order to produce a syngas that is suitable for methanol synthesis. It was also found that the RWGS reaction is favoured by an increase in the VHSV. In addition, the active carbon FY5 was proven to be an adequate catalyst for the production of syngas from COG.     

顶装焦炉生产化工焦的试验研究

以顶装焦炉生产冶金焦炭的配煤比为基准,减少价格高的主焦煤的比例,增加气煤、贫瘦煤等价格较低的煤种,制定了多种生产化工焦的配煤比例,先在小焦炉试验找出最佳配比,然后在顶装焦炉进行试生产,取得了较好的效果。所生产的化工焦能满足公司甲醇厂造气炉的使用要求,替代了原使用的小块焦,降低了配煤成本及造气成本,提高了经济效益。     

100万t/a焦化装置与50万t/a焦油加氢装置联产——焦炉煤气制氢新工艺探讨

50万t/a焦油加氢装置以100万t/a焦化装置的焦油及外购焦油为原料,并利用焦化装置的焦炉煤气采用新工艺制取氢气,重点介绍了制氢工艺流程。通过新工艺,可以从50 000 m3/h的焦炉煤气中产出40 110 m3/h纯度为99.9%的氢气,氢气产量增加1倍,能够满足50万t/a焦油加氢项目的氢气用量;同时副产出22 508 m3/h热值为17.9 MJ/m3～19.4 MJ/m3的混合解吸气,满足焦炉燃料使用需求。     

焦炉煤气脱硫、脱氨工艺的合理配置及组合新工艺

回顾了我国焦炉煤气净化工艺技术的发展历程,比较了各种焦炉煤气脱硫脱氨组合工艺的优缺点,介绍了配有脱硫废液处理装置的焦炉煤气脱硫、脱氨组合新工艺系统。     

焦炉气制甲烷的新型催化剂及其应用工艺

介绍了一种用于焦炉气回收制甲烷的新型催化剂,模拟工业条件的测试实验数据显示,该新型催化剂具有高活性、良好的耐热性和抗结炭性,适用于焦炉气或煤制气制合成甲烷的工艺.根据该催化剂性能提出2种新型工艺流程:一是以焦炉气为原料,设置两段绝热催化反应加变压吸附系统的工艺,以制取天然气和纯氢产品;二是在焦炉气中添加煤气或富含碳氧化...     

一种低能耗捕集CO2煤基甲醇和电力联产过程设计

传统的煤制甲醇过程所需合成气的氢碳比为2.1左右,而煤气化粗合成气氢碳比仅为0.7左右,因此需要将部分合成气进行变换来调节氢碳比。然而,变换气与未变换气混合后使得CO₂浓度降低,从而导致CO₂捕集能耗增加。提出了一种低能耗捕集CO₂煤基甲醇和电力联产过程。新联产过程中部分粗合成气首先经过变换,将CO转变为H₂和CO₂,CO₂浓度提高,在此时进行CO₂捕集可实现捕集能耗的降低。经CO₂捕集后,得到富H₂气体,富H₂气体分流后与另一部分煤气化粗合成气混合调节甲醇合成的氢碳比。对新的过程进行了建模、模拟与分析。结果表明相比传统的带CO₂捕集的煤制甲醇和IGCC发电过程,新的联产过程的能量节约率可达到16.5%,CO₂捕集能耗下降30.3%。     

Carbon dioxide reforming of methane with a free energy minimization approach

Carbon dioxide reforming of methane to syngas is one of the primary technologies of the new poly-generation energy system on the basis of gasification gas and coke oven gas. A free energy minimization is applied to study the influence of operating parameters (temperature, pressure and methane-to-carbon dioxide ratio) on methane conversion, products distribution, and energy coupling between methane oxidation and carbon dioxide reforming methane. The results show that the methane conversion increases with temperature and decreases with pressure. When the methane-to-carbon dioxide ratio increases, the methane conversion drops but the H₂/CO ratio increases. By the introduction of oxygen, an energy balance in the process of the carbon dioxide reforming methane and oxidation can be realized, and the CO/H₂ ratio can be adjusted as well without water-gas shift reaction for Fischer-Tropsch or methanol synthesis. This work was presented at the 6 ^th Korea-China Workshop on Clean Energy Technology held at Busan, Korea, July 4–7, 2006.     

焦炉气催化纯氧转化的PRO/Ⅱ模拟计算及分析

对焦炉气制甲醇催化纯氧转化反应进行了分析,建立了焦炉气催化纯氧转化反应的PRO/Ⅱ计算模型,并以文献数据和某项目的设计数据为基础对模型进行了验证。讨论了以焦炉气为原料生产甲醇合成气的局限性,提出配套建设煤制合成气项目,可提高煤炭资源的综合利用效率。     

焦炉煤气利用的分析与建议

综述了焦炉煤气的利用进展,对比分析了国内不同来源的焦炉煤气的利用特点和现状。从产品市场、应用,结合工艺技术,讨论了各利用途径的优缺点和适用性,提出焦炉煤气在钢铁企业中作为轧钢燃气或与转炉气等联合利用是最有效的利用途径;而在供城市燃气的焦化企业中,焦炉煤气制天然气联产清洁能源氢气是最佳的利用途径;独立的焦化企业应避开受市场垄断的能源类产品,开发产品附加值高的化工产品技术。     

JT-8型加氢催化剂在焦炉煤气制甲醇装置上的工业应用

焦炉煤气制甲醇是一项具有明显经济效益、良好环境效益和社会效益的绿色可持续发展焦化技术工艺,焦炉煤气深度净化是关键技术。介绍JT-8型加氢催化剂在焦炉煤气制甲醇装置上的工业应用。工业应用结果表明,采用的JT-8型焦炉煤气加氢转化催化剂有机硫加氢转化率达98.1%、不饱和烃加氢饱和转化率达100%、O₂深度转化率达100%;二级脱硫反应器出口净化气中杂质含量和总硫含量完全满足后续工序＜0.1 mg·m^-3的要求,保证了生产装置长周期稳定运行。JT-8型加氢催化剂适应性强、深度转化能力高（有机硫加氢转化、不饱和烃加氢饱和及O²深度转化）、副反应少、性能稳定、处理量大和运行寿命长,具有明显的经济效益。     

捣固炼焦值得关注的几个问题

叙述了捣同炼焦配煤与焦炭质量的关系及捣固强度与配煤的关联性.指出:焦炭质量的基础是配煤质量,不会因煤准备和炼焦工艺等有根本性的改变;捣固炼焦可多用低变质程度,高挥发分气煤类的炼焦煤生产出一定质量的焦炭;捣同炼焦配煤适当增加黏结性配煤比例可提高焦炭质量,但用接近顶装焦炉的配煤进行捣固炼焦将丧失其优势并引发问题.捣固焦炉的...     

焦炉烟道废气-流化床式煤调湿技术的应用

利用焦炉烟道废气为热源及动力源,在流化床设备内对捣固焦炉配合煤进行预处理。生产应用表明,流化床煤调湿技术对配合煤调湿及分级作用明显,调湿后配煤水分降低2.2%,减少回炉煤气用量1474×104m3,CO2减排8750t,减少焦化废水处理量2万t,焦炉生产能力提高5%,排空废气粉尘含量〈50mg/m3。     

焦炉煤气合成燃料甲醇发展前景分析

焦化工业的清洁生产提出了对焦炉气进行有效利用的重要课题。从技术和经济两方面对焦炉气催化合成甲醇进行了分析,认为该工艺原料丰富,经济性强,技术可靠,环境效益好,对发展燃料甲醇替代能源、保障国家能源供应安全,具有十分重要的意义。     

焦炉煤气经甲醇生产芳烃研究

我国焦化产业每年副产大量焦炉煤气。从市场前景、技术进展以及效益分析等方面对焦炉煤气经甲醇生产芳烃进行了阐述,为发展绿色、健康、可持续的焦化产业提供了一条新途径。     

NHD净化技术的应用与开拓

NHD脱硫、脱碳技术具有能耗低、净化度高、设备和流程简单等特点,已在合成氨、甲醇和醋酸生产企业的脱硫、脱碳中得到了成功应用,并取得了丰富的实践经验.近年来,又全力开发NHD技术在焦炉气脱硫中的应用,并取得了突破性的成果,为实现焦炉气制甲醇技术的工业化提供了有效的脱硫工艺.     

顶装炼焦改造为捣固炼焦的生产实践

介绍了JN43-80型焦炉由顶装炼焦改为捣固炼焦的改造工程,对比了改造前后炼焦用煤质量指标、配煤煤种和比例、用煤量、焦炭质量指标、化工产品回收率等。顶装炼焦改为捣固炼焦具有减少主焦煤配入量、增加气煤的配入量、提高焦炭产量等优势,通过改造,可使焦化企业降本增效。     

6m焦炉配煤方案的优化与完善

为稳定改善6m焦炉焦炭质量,以20kg小焦炉试验、岩相检测、焦炭反应性和反应后强度检测为主要试验手段,对现用气煤、1/3焦煤、焦煤、低硫肥煤、高硫肥煤、瘦煤等煤种作了配煤炼焦试验,优化了配煤结构。并从经济效益出发,在保证焦炭强度的条件下,提高了气肥煤配量,进一步优化完善了6m焦炉的用煤结构,年新增效益700多万元。