10m~3高真空多层绝热低温液体运输车的研制

10m3高真空多层绝热低温液体运输车用于运输液态氧、氮和氩等低温液体产品。详细介绍了10m3高真空多层绝热低温液体运输车的主要设计参数、结构和工艺流程,阐述了制造过程中需重点控制的环节,分析了设计制造过程中需重点考虑的方面。     

低温液体的贮存包装

随着我国科学技术水平的不断发展 ,在高科技领域内对低温液体的需求也越来越广泛。像液氢(Ｈｚ)、液氧 (Ｏｚ)、液氦 (Ｈｅ) ,液氮 (Ｎ2 )、液氩 (Ａｒ)等低温液体 ,贮存和运输都需要容器来包装。贮存包装这些温度极低的液体是一门高科技技术 ,对温度在零下几十至几百摄氏度的低温液体都必须进行防火、防爆、防静电的安全包装。目前国内外通常采用的包装形式有高真空绝热、真空粉末绝热、真空玻纤绝热和高真空多层绝热。贮存低温液体的包装容器的材料 ,大多采用不锈钢及碳纤维复合材料来加工制造。在绝热层的外部再套上用碳钢或不锈钢加工制…     

苏州杜尔气体化工装备有限公司

<正>大型常压低温液体储罐大型常压低温液体贮槽是目前最经济的液体储存方法,具有储存量大、压力低、安全可靠的特点,广泛应用于工业气体LN2、LAr、LO_2、LNG等低温液体的储存,贮槽采用平底拱盖、圆柱双层壁粉末绝热结构,主要由内胆、外槽、绝热结构、管路系统及安全装置等组成。LO2、LN2大型常压低温液体贮槽工艺流程系统     

苏州杜尔气体化工装备有限公司

<正>大型常压低温液体储罐大型常压低温液体贮槽是目前最经济的液体储存方法,具有储存量大、压力低、安全可靠的特点,广泛应用于工业气体LN2、LAr、LO2、LNG等低温液体的储存,贮槽采用平底拱盖、圆柱双层壁粉末绝热结构,主要由内胆、外槽、绝热结构、管路系统及安全装置等组成。LO2、LN2大型常压低温液体贮槽工艺流程系统LNG大型常压低温贮槽流程系统     

苏州杜尔气体化工装备有限公司

<正>大型常压低温液体贮槽大型常压低温液体贮槽是目前最经济的液体储存方法,具有储存量大、压力低、安全可靠的特点,广泛应用子工业气体LN2、LAr、LO2、LNG等低温液体的储存,贮槽采用平底拱盖、圆柱双层壁粉末绝热结构,主要由内胆、外槽、绝热结构、管路系统及安全装置等组成。LO2、LN2大型常压LNG大型常压低温液体贮槽工艺流程系统低温贮槽流程系统     

大型低温液体贮槽绝热系统设计

简介大型低温液体贮槽绝热系统的绝热材料及其主要性能指标;叙述了绝热系统的结构设计、氮封系统设计和基础设计,并分析了目前大型低温液体贮槽在订货、设计和使用中可能存在的几个问题和解决方法。     

真空多层绝热移动式中小型低温液体贮槽设计制造中应控制的几个问题

真空多层绝热是一项新的绝热技术，对于改善低温贮槽的绝热性能，提高真空寿命，降低蒸发率具有重要意义。这项技术理论并不复杂，但工艺要求高，施工难度大，尤其在移动式中小型低温液体贮槽中应用，难度更大。根据有关单位的实践，在应用这一新技术设计制造移动式中小型低温液体贮槽时要着重控制好以下几点。     

用于多层绝热热导率测量的无防护低温恒温器

目前，人们已经制造出了一种用于测量多层绝热的有效热导率的低温恒温器。多层绝热所处的环境类似于标准低温液体容器中的环境。列出了两种多层绝热的结果。     

苏州杜尔气体化工装备有限公司

<正>大型常压低温液体贮槽大型常压低温液体贮槽是目前最经济的液体储存方法,具有储存量大、压力低、安全可靠的特点,广泛应用于工业气体LN2、LAr、LO2、LNG等低温液体的储存,贮槽采用平底拱盖、圆柱双层壁粉末绝热结构,主要由内胆、外槽、绝热结构、管路系统及安全装置等组成。     

苏州杜尔气体化工装备有限公司

<正>大型常压低温液体贮槽大型常压低温液体贮槽是目前最经济的液体储存方法,具有储存量大、压力低、安全可靠的特点,广泛应用于工业气体LN2、LAr、LO2、LNG等低温液体的储存,贮槽采用平底拱盖、圆柱双层壁粉末绝热结构。主要由内胆、外槽、绝热结构、管路系统及安全装置等组成。     

Cryogenic liquid sampling and safety

Different techniques of cryogenic liquid sampling are discussed. Sampling lines for cryogenic liquids must be as short as possible with minimum heat inleak in order to deliver samples with little or no vaporization. Also the vaporizers used must avoid causing composition changes in the liquids.Methods of avoiding sample contamination and ensuring safe handling are also discussed.     

Theory to boil-off gas cooled shields for cryogenic storage vessels

An intermediate refrigeration with boil-off gas cooled shields using the boil-off gas stream is an alternative method to the conventional intermediate refrigeration with a cryogenic liquid.By using an analytical calculation method relations are derived, which enable complete predictions about the effectiveness of an intermediate refrigeration with boil-off gas cooled shields as a function of the number of shields for the different stored cryogenic liquids. For this theoretical derivation however, the restrictive assumption must be made that the thermal conductivity of the used insulation material has a constant value between the considered temperature boundaries.For purposes of a more exact calculation a numerical method is therefore suggested, which takes into consideration that the thermal conductivity is temperature-dependent. For a liquid hydrogen storage vessel with a perlite-vacuum insulation e.g., the effectiveness of one shield and its equilibrium temperature are given as a function of the position of the shield in the insulation space.     

Discussion on the Cryogenics Safety Manual

The use of cryogenic liquids is a world-wide activity which involves many different sectors of industry. In 1970 the Safety Panel of the British Cryogenics Council published the Cryogenics Safety Manual which condensed the safety principles of the different industry sectors and set out a guide to good practice. The manual was revised in 1982 and a further revision is proposed for 1988 to reflect current operating practices in the handling of cryogenic liquids. The Manual is now widely regarded as required reading for engineers involved in cryogenic applications. This paper describes the role of the Manual as a training guide and highlights the significant changes proposed in the latest revision.     

Supercavitating pumps for cryogenic liquids

Pumps for cryogenic liquids have a number of special mechanical and insulation problems because of the low temperatures. In addition there can be hydrodynamic problems due to trying to pump the liquid near its boiling point c causing cavitation. The problems of cavitation in pumping are discussed and the limitation and effects that this imposes on the pumps. The supercavitating pump enables many of these problems to be overcome and allows the pump to be operated at inlet pressures of one third of that of conventional pumps, which has clear advantages in the cryogenic field. The characteristics are given of some prototype supercavitating pumps that have been running for over two years.     

低温高速离心泵的研制与应用

阐述了适合于输送低温介质的高速离心泵的水力设计和结构设计方法，结构上采有长，中，短叶片相间的复合叶轮及双密封结构，理论上采用以效率为目标函数的优化水力设计方法，保证了低温高速离心泵具有很好的工人可靠性和优越的性能指标。     

阻燃型低温绝热纸的出气速率和出气成分测试

低温绝热纸是制造多层绝热低温容器的重要材料之一。在真空条件下绝热纸的出气速率影响低温容器的真空性能,是低温容器设计的重要依据。介绍了低温绝热纸测试装置的设计及技术指标,利用静态法测试了阻燃型低温绝热纸的出气速率和出气成分,给出了试验数据。     

Applications of cryogenic containers

The advantages of the storage and handling of atmospheric gases in liquid form are universally appreciated, but their realization depends on the economic justification.The considerable advance made in the design and production of cryogenic containers, particularly using “wrapped insulation” has resulted in greatly improved liquid conservation, longer service life and reliability, and lower capital cost.Many applications using cryogenic liquids have now become economically and operationally acceptable on a worldwide basis, and this review examines the development and interdependence of the equipment and the application.     

低温液体换热中的污垢问题

低温液体纯度较高,由其换热所导致的污垢问题常常被忽略。但即使纯度很高的低温液体,存在其中的痕量杂质如ＣＯ２和碳氢化合物也可能造成污垢沉积,特别是对于沸换热。本文对低温液体换热中的污垢现象、影响参数及溶解度计算等问题进行了综述。     

绝热材料放气速率测试台研制

高真空条件下,绝热材料的放气速率会影响低温容器的真空性能,从而影响其绝热性能。根据GB/T31480-2015,搭建了绝热材料放气速率测试平台。通过本底放气速率的测定,验证了该测试平台的可靠性;利用静态法测试了某型号多层绝热材料的放气速率,给出了试验数据。本试验台将为绝热材料的应用及低温容器的设计提供数据支撑。     

B型LNG模拟舱内低温流体两相流动与相变传热数值研究

本文以内容积为40 m3，绝热层厚度为400 mm的新型独立B型液化天然气船模拟舱为研究对象，对模拟舱内低温流体的两相流动及相变传热问题进行了非稳态三维CFD模拟。采用流体体积函数（VOF）模型追踪气液相界面，利用Lee模型作为相变模型，在相变模型中考虑了静压的影响，对模拟舱的温度分布及静态BOG生成速率进行了计算。研究了在不同液位以及绝热层存在破损的情况下模拟舱的温度分布及静态BOG生成速率的变化，同时研究了当模拟舱密闭时的增压特性。对比模拟结果与实验结果，偏差在10%以内，模型对模拟舱内的低温液体的蒸发过程模拟较好，可为新型独立B型液化天然气实船的设计和改进提供参考。