共查询到20条相似文献,搜索用时 93 毫秒
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煤气化技术是煤炭深加工技术的一个分支,是整体煤气化联合循环发电技术的重要组成部分。笔者介绍了相关的研究背景,阐述了SHELL炉的煤粉制备和送料系统、气化炉及煤气冷却剂等技术,详细研究了气化炉的基本原理,并对煤气化技术水冷壁气化炉的一些注意事项进行了分析。 相似文献
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气化炉形式多样,新型水冷壁气化炉为新试制设备,结构复杂,制造难度大,详细介绍了新型水冷壁气化炉主要零部件的制造难点及解决办法,作为后续同类产品的参考。 相似文献
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从水煤浆气化炉工艺烧嘴最长使用天数及修理情况介绍入手,分析了影响水煤浆气化炉工艺烧嘴使用寿命的主要因素,在此基础上提出了延长水煤浆气化炉工艺喷嘴使用寿命的有效途径。 相似文献
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垃圾气化是一项新型能源开发及垃圾环保处理的新技术。该技术将预先筛选、破碎的城市生活垃圾,送入到气化炉中,在气化炉的控制条件下,使垃圾中的有机组分发生化学反应,经过一定的处理手段,最终制得清洁可燃气体供人们使用。分析了国内外近年来垃圾热分解技术的研究进展,阐明了垃圾气化的化学原理,结合图例及研究概况,分类介绍了垃圾气化工艺及主要设备,最后,对垃圾气化技术的应用前景进行了展望。 相似文献
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设计制作一种机械式燃气灶定时开关,可以根据使用者预先设定的时间到时准确关闭,从而能够达到杜绝厨房安全隐患的目的。本设计利用外接的定时器对燃气灶进行时间控制,通过机械结构的传动准确关闭点火开关。其特点是工作稳定,受环境影响小,成本低,安装方便等。 相似文献
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Cheol Man Kim Young Pyo Kim Woo Sik Kim 《Journal of Mechanical Science and Technology》2017,31(8):3691-3695
Hydrogen usually penetrates metals through defects such as dislocations, vacancies, and crystalline imperfections and causes embrittlement, leading to cleavage fracture and intergranular fracture. Synthetic natural gas produced by coal gasification, biogas, and landfill gas inevitably contain hydrogen. Therefore, hydrogen embrittlement of pipeline materials should be considered when they are mixed with conventional natural gas and supplied to customers. To analyze hydrogen embrittlement of base metals and girth weld metals of API 5L X70 and X65 gas pipelines, a specimen was treated in 100 % hydrogen environment at 10 MPa to determine the hydrogen concentration in it. Small punch (SP) tests were performed under various gaseous components and pressures. When SP tests were performed at very low speed, hydrogen embrittlement could be observed. Specimens became very susceptible to hydrogen embrittlement with increasing hydrogen partial pressure in the hydrogen/methane gas mixture, and the SP energy also decreased dramatically. 相似文献
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Arnaud Leclerc 《仪器科学与技术》2013,41(4):390-428
This article evaluates a hybrid multi-compartment cyclic fluidized-bed reactor for the allothermal steam gasification of biomass. The concept combines space and time delocalization to approach an ideal allothermal gasifier. Thermochemical conversion of biomass in time and space sequences of steam biomass gasification and char/biomass combustion is envisioned in which the exothermic combustion compartments provide heat into an array of interspersed endothermic steam gasification compartments. This concept may enhance unit heat integration and thermal efficiency while procuring nitrogen-free synthesis gas without requiring addition of oxygen (or air) to the steam gasification compartment nor contact between the flue gas and the synthesis gas. The strengths and weaknesses of existing autothermal and allothermal gasification technologies are analyzed and a new allothermal reactor concept is introduced. Elements of gasification chemistry, fluidization hydrodynamics, and heat transfer requirements are described that are relevant for the design of the multi-compartment fluidized-bed gasifier/combustor. A preliminary design of the experimental hot mock-up is presented, including a discussion of process diagrams and mass balance. 相似文献
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Young Nam Chun Dae Won Ji Kunio Yoshikawa 《Journal of Mechanical Science and Technology》2013,27(1):263-272
A study on pyrolysis, steam gasification, and carbonization-activation was conducted to produce energy and resource from waste sewage sludge. Carbonization-activation is a sequential process of pyrolysis and steam gasification. The experiment was conducted with a batch-type fixed bed reactor. A comparative analysis on the formation characteristics of products, such as gas, tar, and char, was conducted to evaluate the three cases. For sludge char, carbonization-activation showed the largest amount of porosity in the char, and its specific surface area was 80.28 m2/g with an average pore diameter of 6.229 nm. The best adsorption ability of benzene, a light tar, was 175 mg/g. For the producer gas, steam gasification obtained the largest amount of 20.1 L. Similarly, carbonization-activation showed a large value of 16.6 L. Hydrogen and carbon monoxide concentrations were higher in the producer gas due to steam reforming compared with carbonization-activation. Energy yields were 209 kJ and 226 kJ for steam gasification and carbonization-activation, respectively. The amount of tar formation did not show a significant difference, but the largest one was found in steam gasification. The gravimetric tar amount for steam gasification was 23.5 g/Nm3. However, the selected light tar displayed the lowest concentration for the carbonization-activation. Such concentrations were 2.79 g/Nm3, 0.75 g/Nm3, 0.14 g/Nm3, and 0.14 g/Nm3 for benzene, naphthalene, anthracene, and pyrene, respectively. Therefore, carbonization-activation was found to be the most effective process for producing high quality sludge char and producer gas for utilizing waste sludge into renewable energy and resources. 相似文献
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天然气作为清洁能源受到越来越多国家的青睐,在能源供应中正以每年约12%的高速增长,很多国家都将LNG列为首选燃料。我国对LNG产业的发展也越来越重视。仪器仪表自动化系统是LNG气化站的一个重要组成部分。本文根据有关的工艺特点,提出其具体解决方案。 相似文献
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介绍了热脏发生炉煤气加热炉的煤气炉选型、炉型、换热器及蓄热式燃烧技术的缺陷,通过分析比较,找出实现低煤耗的各种技术环节。 相似文献
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通过向混合发生炉煤气气化剂—空气中充入一定比例的O2,以提高气化剂中O2含量,降低N2含量,使原料煤在富氧的气化条件下,更加完全的进行煤炭气化反应,从而提高煤气发热值,降低灰渣含C量,提高煤炭利用率,以达到节能减排、降本增效的作用。 相似文献