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     

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。     

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。     

杭氧开发2000m~3大型低温液体贮槽

杭氧集团公司空分一厂最近承接了为美国Ｐｒａｘａｉｒ (上海 )半导体公司提供大型粉末绝热 2 0 0 0ｍ3液氮贮槽和 670ｍ3液氧贮槽各 1台的设计和制造合同。这是继 1999年杭氧为Ｐｒａｘａｉｒ公司生产 4 2 5～ 13 0 0ｍ34台大型液体贮槽后的双方又一次合作 ,也是杭氧首次生产 2 0 0 0ｍ3大型液体贮槽。合同要求 ,贮槽按ＧＢ15 0、ＡＰＩ62 0、ＡＮＳＩ和ＰｒａｘａｉｒＧＳ 3 3、ＧＳ 3 8等相关标准规范设计和制造 ,产品将于 2 0 0 1年 12月交货 ,卖方提供贮槽交钥匙工程。近年来 ,杭氧大型低温液体贮槽生产发展很快 ,先后与德国Ｌｉｎｄｅ…     

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、L02、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01、进液系统02、排液系统03、泵后回流系统04、夹层氮气供应系统05、液位、压力测量系统     

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。     

苏州华福开发热虹吸式低温液体贮槽新产品

1999年苏州华福低温容器有限公司根据市场需要 ,设计开发了 10ｍ3 、 15ｍ3 、 2 0ｍ3 三种规格热虹吸式低温液体贮槽 ,为吴江梅塞尔气体公司制造了ＣＦ15 0 0 0 /8Ｒ型热虹吸式低温液体贮槽。热虹吸式低温液体贮槽是利用热虹吸式原理 ,使低温泵启动时间由原来的 30分钟缩短到     

大型低温液体贮存站贮罐设计选型论证(续)

运用热力学第一定律对低温液体在贮存、运输转注过程中的热力学特性进行了分析,定量分析、计算了低温液体节流过程的节流汽化率值,提出了减少节流过程所形成的汽化率的有效途径;论证了在大型低温液体贮存站贮罐设计选型时,应根据不同的低温液体液源、液体品质和操作工况等条件进行设计选型;论证了除合理地选择正确的低温液体贮罐结构形式外,还应高度重视低温液体贮罐的安全泄放设计,以确保低温液体贮存站的安全性能、使用性能和技术经济性能均处于最佳状态。     

Passive ZBO storage of liquid hydrogen and liquid oxygen applied to space science mission concepts

Liquid hydrogen and oxygen cryogenic propulsion and storage were recently considered for application to Titan Explorer and Comet Nuclear Sample Return space science mission investigations. These missions would require up to 11 years of cryogenic storage. We modeled and designed cryogenic propellant storage concepts for these missions. By isolating the propellant tank’s view to deep space, we were able to achieve zero boil-off for both liquid hydrogen and oxygen propellant storage without cryocoolers. Several shades were incorporated to protect the tanks from the sun and spacecraft bus, and to protect the hydrogen tank from the warmer oxygen tank. This had a dramatic effect on the surface temperatures of the propellant tank insulation. These passive storage concepts for deep space missions substantially improved this application of cryogenic propulsion. It is projected that for missions requiring larger propellant tank sizes, the results would be even more dramatic.     

空分装置氩气回收器的研究

氩气广泛应用于工业生产领域,在大气当中含量较少,一般通过深冷分离获得。氩气在应用过程中先将液氩产品贮存在低温贮槽内,然后通过液体泵或自增压加压气化后使用。由于低温贮槽与环境存在换热,导致部分氩气泄漏,造成了一定量的损失。为了回收这部分泄漏的氩气,研发了氩气回收器,其通过液氮冷源将贮槽蒸发氩气液化回收,然后再回到贮槽,实现了最大限度地提高氩的利用率目的,发挥较大的经济效益。     

Vapour phase motion in cryogenic systems containing superheated and subcooled liquids

The development of vent pipelines, and venting storage tanks for cryogenic liquids requires the knowledge of the law of motion as well as regularities of vapour content variation in the liquid and heat dissipation by the vapour phase. This is a theoretical study of the effect of superheating (subcooling) of the liquid, relative acceleration and reduced pressure upon the size and velocity of noninteracting vapour bubbles, moving in the liquid, and upon their resistance and heat transfer coefficients.     

高精度低温介质稳态质量流量、液位自动测量系统

介绍一种高精度低温介质稳态质量流量、液位自动测量系统,该系统包括液面计、密度计、二次仪表、采集系统、微机系统等,可通过计算机对低温介质贮箱中的液位进行实时监测,并能计算低温介质的稳态质量流量。该系统对液氧液位实时监测的精度可达到3％,对液氧稳态质量流量测量的精度可达到0．473％。     

The evaluation of an improved method of gas-freeing an aviation fuel storage tank

A new technique is described for the gas-freeing of large storage tanks used for aviation fuel. The technique involves the use of natural and mechanical ventilation, together with an air-driven pump for removal of liquid residues form the irregular bottom of the tank. Am assessment was made by gas-freeing a 4500m{inf3} (1 M gal) tank in which the atmosphere was monitored using portable flammable gas detectors and checked by the analysis of samples using chromatography. The new technique was much quicker than the traditional method of gas-freeing and was more controlled so that a work schedule could be devised in advance with confidence.The portable gas detectors were shown to under-estimate gas concentrations; it is thus imperative that the concentration levels at which various inspection and maintenancem operations are permitted in tanks should reflect the likely errors of the instrument used to measure concentration.     

Fatigue crack propagation behavior in AISI 304 steel welded joints for cold‐stretched liquefied natural gas (LNG) storage tank at cryogenic temperatures

AISI304 steel welded joints are used in cold‐stretched liquefied natural gas (LNG) storage tanks used for storing and transporting of liquefied gases. Compared with a conventional liquefied natural gas storage tank, a cold‐stretched liquefied natural gas storage tank has many advantages such as reduced thickness, light weight, low cost and low energy consumption. However, liquefied natural gas storage tanks can be subjected to alternative loads at cryogenic temperatures; thus, it is important to investigate the fatigue crack propagation behavior in AISI 304 steel welded joints at cryogenic temperatures. Specimens were machined from a cold‐stretched liquefied natural gas storage tank with a welding structure. The crack length was determined using compliance method and confirmed by examination with traveling microscope. Fatigue crack propagation rates were evaluated at various stress ratios and temperatures. The fatigue crack growth rate of all specimens a little appears the effect of stress ratio, but it has a great influence at a cryogenic temperature. The fatigue crack growth rate of longitudinal welded joint is the fastest at room and cryogenic temperature. Fracture mechanism in the specimen is examined using a scanning electron microscope.     

Three-dimensional analysis for liquid hydrogen in a cryogenic storage tank with heat pipe–pump system

This paper presents a study on fluid flow and heat transfer of liquid hydrogen in a zero boil-off cryogenic storage tank in a microgravity environment. The storage tank is equipped with an active cooling system consisting of a heat pipe and a pump–nozzle unit. The pump collects cryogen at its inlet and discharges it through its nozzle onto the evaporator section of the heat pipe in order to prevent the cryogen from boiling off due to the heat leaking through the tank wall from the surroundings. A three-dimensional (3-D) finite element model is employed in a set of numerical simulations to solve for velocity and temperature fields of liquid hydrogen in steady state. Complex structures of 3-D velocity and temperature distributions determined from the model are presented. Simulations with an axisymmetric model were also performed for comparison. Parametric study results from both models predict that as the speed of the cryogenic fluid discharged from the nozzle increases, the mean or bulk cryogenic fluid speed increases linearly and the maximum temperature within the cryogenic fluid decreases.     

复杂环境下爆破拆除45m高砖结构烟囱

45m高砖结构烟囱位于大型化工厂区,烟囱附近分布有热力管线、液氯车间和乙炔贮气铁罐;受地震影响在烟囱上部35m处向西偏3°。针对烟囱自身结构特殊性和四周环境的复杂性,采用开倒梯形切口定向倾倒爆破方案,且对爆破参数、安全防护、爆破网路进行精心地设计和施工,并对倾倒条件及稳定性进行验算。爆破取得了圆满成功。     

复杂环境下爆破拆除45m高砖结构烟囱

45m高砖结构烟囱位于大型化工厂区,烟囱附近分布有热力管线、液氯车间和乙炔贮气铁罐;受地震影响在烟囱上部35m处向西偏3°。针对烟囱自身结构特殊性和四周环境的复杂性,采用开倒梯形切口定向倾倒爆破方案,且对爆破参数、安全防护、爆破网路进行精心地设计和施工,并对倾倒条件及稳定性进行验算。爆破取得了圆满成功。