液化天然气汽化工艺及冷量利用研究

液化天然气作为低温燃料, 在汽化时放出大量的冷量, 这部分冷量可以被其它工艺过程有效的利用。本文深入探讨了液化天然气(LNG)汽化工艺及其冷量利用技术的最新进展,揭示了该领域的关键挑战与潜在机遇。通过系统分析LNG汽化的基本原理、现有汽化技术的优势与局限,本研究强调了高效汽化技术的发展趋势。同时,本文对冷量回收的重要性及其在实际应用中的表现进行了深入讨论,展示了冷量利用技术的多样性和创新性。结合实验数据和实际案例,本研究为优化LNG汽化工艺和冷量利用提供了实用建议,旨在推动能源效率的提升和环境保护。

液化天然气汽化工艺及冷量利用

液化天然气作为低温燃料,在汽化时放出大量的冷量,这部分冷量可以被其它工艺过程有效的利用。介绍了液化天然气的汽化工艺流程、汽化站储存总容积的确定及汽化器传热面积的确定,通过对LNG冷量火用分析数学模型和LNG冷量火用特性进行热力学分析,总结了发电、空分、干冰制取、低温粉碎、蓄冷装置等各种工艺过程中LNG冷量的利用方式。

分析液化天然气汽化工艺及冷量利用问题

天然气在我们的日常生活和工作中扮演着非常重要的角色。以液体形式储存的液化天然气在实际工作中需要转化为气体,因此就需要一项工艺将液化天然气汽化。天然气汽化在我国应用比较晚,随着社会的发展,这项工艺的重要性愈发突显。因此,就液化天然汽化工艺及冷量利用问题方面进行了分析与探讨。

液化天然气汽化工艺及冷量利用问题分析

天然气作为我国生产生活中非常重要的一项能源,其中液化天然气的使用已经非常频繁。当前在实际应用的时候,一般是选择利用气体的天然气,这就需要将液化的天然气进行汽化处理。虽然我国天然气汽化工艺同西方国家相比起步比较晚,但是近年来也在持续的发展。及时同西方发达国家的天然气汽化工艺相比仍有不小差距,但是随着技术进步这种差距会越来越小。本文主要阐述了液化天然气的汽化工艺以及冷量利用问题,希望能够提高液化天然气汽化的效率。

基于道化学火灾爆炸危险指数法的液氨存储与汽化工艺安全风险研究

液氨具有较高危险性且容易发生爆炸与急性中毒事故.本文以液氨储存与汽化的工艺在同一生产场所的场景为例,对液氨与汽化氨并存工艺生产场所的火灾爆炸危险性,利用道化学火灾爆炸危险指数法进行了风险研究,结果表明:以液氨与汽化氨并存工艺生产场所为评估单元、以氨为决定物质的液氨存储与汽化工艺的道化学危险火灾爆炸指数(F&EI)为108、危险程度中等、危险等级Ⅲ级;在采用安全补偿措施后,可以将引发危险的可能性降至为危险程度最低、危险等级Ⅰ级;实际案例生产场所的围堤防护距离与保护面积均不能完全覆盖,需要采取针对性措施保障安全生产.

液氢汽化加氢加气合建站工艺设计方案

我国已建成的加氢站大部分是高压储氢加氢站,高压氢气储运效率低、经济供氢半径小,单站的氢气供给规模小,高压储氢加氢站核心设备——氢气隔膜压缩机价格高、耗能高、使用寿命短。为了解决以上问题,提出了建设液氢汽化加氢加气合建站的方案,以充分利用我国已经建成的2000多座加气站。本技术方案在一个合建站内实现了燃料电池汽车气态氢气加氢、氢气长管拖车充装、液氢燃料电池汽车液氢加注、压缩天然气(compressed natural gas, CNG)汽车加气和CNG长管拖车充装功能,可以在高压储氢加氢站相同的占地面积上实现3倍的加氢规模,增加合建站内能源加注类型、降低合建站的投资成本,提高合建站的运营经济性。

液化天然气汽化工艺及冷量利用问题分析

天然气是我国人们生活和工作中必不可少的重要能源,其中液化天然气是以液体的形式存储,但是在实际应用的时候,一般是利用气体的天然气,因此,需要将液化的天然气进行汽化。我国的天然气汽化工艺虽然起步比较晚,但是近年来也在不断的发展。然而和发达的国家天然气汽化工艺相比,还表现出一定的差距。本文主要阐述了液化天然气的汽化工艺以及冷量利用问题,旨在与同行进行交流,提高液化天然气汽化的效率。

松潘县川主寺镇液化天然气(LNG)工艺流程改造

松潘县川主寺镇LNG汽化工程,根据GB 50026—2006城镇燃气设计规范的要求,需要对场站工艺、消防等多方面进行调整。此工程采用水套加热炉工艺,与常规LNG水浴式汽化器加热工艺相比较,为满足LNG低温要求,将水套加热炉里盘管材质变为耐低温材料的0Cr18Ni9奥氏体不锈钢材料,由此提出了新的汽化方案,即在冬季通过水套炉将天然气进行加热。该方案简化了LNG汽化工艺流程,减少了锅炉等附属设施,节约了成本,同时为今后类似的工程实践提供了借鉴意义。

防止尿液泵进口介质汽化的技术措施

1问题的提出 中石油宁夏石化分公司二化肥尿素主装置采用意大利斯那姆氨汽提工艺,装置从1999年9月试车到2002年5月底,低压预浓缩器尿液出口温度一直≤90℃,远离设计值103℃,预浓缩器出口尿液泵汽化非常频繁,由于打量不稳,又导致熔融尿液泵进口液位和出口打量频繁波动,最终导致造粒喷头易堵,严重时出现死床,成为影响造粒长周期运行的关键因素(造粒运行周期最长为7d,最短为2d),大大增加了清床造成的人、财、物资源浪费.

煤炭的第二次工业革命

通过FutureGen项目，将煤炭转换成电能的过程将不再是一场破坏环境的噩梦．

专利资讯

专利名称：废橡胶、废油、废塑料的汽化工艺及汽化装置 本发明公开了一种废橡胶、废油、废塑料的汽化工艺及汽化装置，包括能将高分子废弃物加热和熔融的热分解装置、高分子废弃物经热分解形成的热分解气体，在催化剂的作用下被水蒸气改质的改质装置、控制和调节温度的热交换装置、经所述改制装置后的改质气体在经过冷却和液化后回收改质气体油分的油分回收装置、油回收槽和连接管路，其特征在于所述热分解装置、改质装置、热交换装置、冷却精制装置和油回收槽依次通过所述连接管路连接，该设备不仅能将废塑料等高分子废弃物汽化后生成较为优质的合成气体，而且能回收汽化气体的含油组分并作为燃烧装置的燃烧油使用。

Ethanol Recovery from Fermentation Broth by Pervaporation Using a Composite polydimethylsiloxane Membrane

The pervaporation behavior of fermentation broth was investigated experimentally and compared with those started with ethanol mixtures. Ethanol was produced by Saccharomyces cerevisiae utilizing technical grade glucose and recovered by pervaporation using a composite polydimethylsiloxane (PDMS) membrane prepared in our laboratory. Ethanol concentration in fermentation broth decreased to a relatively low level when pervaporation was coupled with fermentation. The more active cells appeared in the fermentation broth, the better the membrane performance was.

Effect of Operating Parameters on Composition of Dry Gas Obtained During Gasoline Cracking Process

The influence of operating parameters on ethylene content in dry gas obtained during catalytic cracking of gasoline was investigated in a pilot fixed fluidized bed reactor in the presence of the MMC-2 catalyst. The results have shown that the majority of dry gas was formed during the catalytic cracking reaction of gasoline, with a small proportion of dry gas being formed through the thermal cracking reaction of gasoline. The ethylene content in dry gas formed during the catalytic cracking reaction was higher than that in dry gas formed during the thermal cracking reaction. The ethylene content in dry gas formed during catalytic cracking of gasoline with a higher olefin content was higher than that in dry gas formed during catalytic cracking of gasoline with a lower olefin content, which meant that the higher the amount of carbonium ions was produced during the reaction, the higher the ethylene content in the dry gas would be. An increasing reaction temperature could increase the percentage of dry gas formed during thermal cracking reaction in total dry gas products, leading to decreased ethylene content in the dry gas. An increasing catalyst/oil ratio could be conducive to the catalytic cracking reactions taking place inside the zeolite Y, leading to a decreased ethylene content in the dry gas. A decreasing space velocity could be conducive to the catalytic cracking reactions taking place inside the shape-selective zeolite, leading to increased ethylene content in the dry gas.

液氯生产如何实现本质安全

介绍福建湄洲湾氯碱工业有限公司液氯生产装置运用本质安全策略,进行一系列自动化改造和技术改造措施,提高液氯生产、储存设施本质安全水平。具体措施包括:(1)采用液氯磁力泵工艺代替釜式汽化充装工艺;(2)增设氯气泄漏密闭处理系统;(3)落实化工安全仪表安全措施;(4)降低液氯生产、储存过程中的滞留量和储存量。

提高灌封机速率和灌封质量的攻关及验证

目的 提高灌封机速率和灌封质量以达到高产高质的效果。 方法 通过改变电机转速提高灌封机速率来增产增效 ,以加微氧技术和改造汽化炉系统工艺管道的方法来提高成品率及产品质量。结果 产量翻一番 ,封口质量明显改善 ,减轻操作工劳动强度。结论 提高电机转速 ,采用直径 ,1.5 mm的微管输氧并将汽化气压力控制在 0 .1MPa、氧气压力控制在 0 .2 MPa。

Investigation of Calcium Sulfide Regeneration with Steam

Harmless treatment of CaS from coal gas desusulfurization and other industries is of very importance for the environmental protection. In this paper, the experimental investigation of calcium sulfide regeneration with steam at atmospheric pressure was carded out using TGA, fixed bed reactor and SEM-EDX analysis. The results show that the reaction mechanism of CaS with steam varies with temperature. The reaction occurs obviously at the temperature above 630℃ and the dominant products include CaSO4 （or CaSO3） and H2S, as the temperature is over 850℃, the primary products become CaO, SO2 and H2S. The CaS regeneration reaction will strongly depend on the temperature and the data over 900℃ can be fitted by the Shrinking-Core Model （SCM）.

Regeneration of waste activated carbon after extracting gold with steam under microwave heating:Optimization using response surface methodology

The technology that waste activated carbon after extracting gold is regenerated with steam under microwave heating was studied. The influence of the activation temperature, activation duration and steam flow rate on iodine adsorption value and regeneration yield of activated carbon was investigated. The response surface methodology （RSM） technique was utilized to optimize the process conditions. The optimum conditions for the preparation of activated carbon are identified to be activation temperature of 831 ℃, activation duration of 40 min and steam flow rate of 2.67 mL/min. The optimum conditions result in an activated carbon with an iodine number of 1048 mg/g and a yield of 40%, and the BET surface area evaluated using nitrogen adsorption isotherm is 1493 m2/g, with total pore volume of 1.242 cm3/g. And the pore structure of activated carbon regenerated is mainly composed of micropores and a small amount of mesopores.