空调两器检漏设备氦气回收纯化装置的试验研究

本文试验研究了一种针对空调两器检漏设备的氦气回收纯化装置,研究结果表明,该装置可以有效地将空调两器检漏设备内氦气纯度维持在80%以上,该工艺的氦气使用量约为6.7m^3/天,远小于未使用该工艺时系统因纯度低而排放的氦气量(约128m^3/天),考虑到企业实际使用该装置的经济性要求,提出了该装置后续工艺优化的方向。     

基于PLC和组态王的真空检漏回收装置监控

为实现电冰箱整机、空调器及蒸发器和冷凝器等部件在流水线上焊接工序后进行快速检漏和氦气的循环利用,研发了真空检漏回收装置监控系统.该系统采用上下位机控制模式,上位机采用工控机+组态软件,下位机采用OMRON中型CQMIH,充分发挥各自优势,实现了真空检漏回收装置的监控.实际运行表明,系统最小可检漏率达到1×10-3Pa·m3/s,氦气回收率不低于97％.     

氦气放空管道和氦气回收系统的连接结构

对ＭＲＩ１．０Ｔ核磁共振成象设备配套的氦气放空管道的结构、回收系统的低压回气管道与设备连接结构和氦气回收系统的改进做了介绍。在第一次用液氦预冷磁体的输液过程中，ＭＲＩ设备蒸发出的大量氦气全部被氦气回收系统回收，总共回收氦气６４６．４ｍ￣３。     

一种氦气低压回收、纯化及储藏装置及其使用方法

申请(专利)号:201310632878.2公开(公告)日:2014-03-12申请(专利权)人:华南农业大学摘要:本发明公开了一种氦气低压回收、纯化及储藏装置,包括管道系统以及由所述管道系统相连通的压缩系统、过滤纯化系统以及在末端的氦气储藏系统,所述过滤纯化系统包括粗氦过滤器、油水分离器、冷干机和吸附筒,所述粗氦过滤器安装在压缩系统的进气管上,油水分离器、冷干机和吸附筒分别安装于压缩系统的出气管上;还公开了使用上述装置进行回收、纯化及储藏浮空器中氦气的方法;本发明采用单级压缩、低温吸附、     

一种氦气低压回收、纯化及储藏装置及其使用方法

<正>申请(专利)号:201310632878.2公开(公告)日:2015-07-29申请(专利权)人:华南农业大学摘要:本发明公开了一种氦气低压回收、纯化及储藏装置,包括管道系统以及由所述管道系统相连通的压缩系统、过滤纯化系统以及在末端的氦气储藏系统,所述过滤纯化系统包括粗氦过滤器、油水分离器、冷干机和吸附筒,所述粗氦过滤器安装在压缩系统的进气管上,油水分离器、冷干机和吸附筒分别安装于压缩系统的出气管上;还公开了使用上述装置进行回收、纯化及储藏浮空器中氦气的方法;本发明采     

空调检漏氦气提纯循环利用系统的研究

针对空调行业氦气检漏过程存在氦气浪费大的现象研究出一种氦气提纯循环利用系统,该系统利用膜分离技术将空调检漏系统排放的废氦气进行回收提纯,并循环供给低压罐以供给空调检漏系统使用,从而有效减少生产过程中对于氦气的消耗量。     

几种实用的氦气回收系统

本文比较系统介绍了氦气回收系统的工作原理、技术要求、连接结构、使用情况以及几种实用的氦气回收系统。     

国内首台工业氦气循环利用系统研制成功

正近日,中国电科十六所万瑞冷电科技有限公司研制成功国内首台工业氦气循环利用系统,该系统采用新型复合提纯、智能化控制等关键技术,可将纯度≥10%的低纯氦气提纯至99.5%以上,系统纯化回收率≥60%。该系统的成功研制标志着十六所氦气回收纯化应用技术由军用领域成功迈入工业民用领域。氦气是一种稀缺的战略资源,尤其在我国,相关     

一种氦气低压回收、纯化及储藏装置及其使用方法

正申请(专利)号:201310632878.2公开(公告)日:2014-03-12申请(专利权)人:华南农业大学摘要:本发明公开了一种氦气低压回收、纯化及储藏装置,包括管道系统以及由所述管道系统相连通的压缩系统、过滤纯化系统以及在末端的氦气储藏系统,所述过滤纯化系统包括粗氦过滤器、油水分离器、冷干机和吸附筒,所述粗氦过滤器安装在压缩系统的进气管上,油水分离器、冷干机和吸附筒分别     

光纤冷却管氦气高效回收方法的研究

氦气的提纯方法有很多种,而且技术都非常成熟。但是氦气的回收却是提纯工艺之前的一个瓶颈,回收氦气的纯度和气量大小直接影响提纯再利用的可行性。给出了光纤领域氦气的使用工况,提出一种实时控制的氦气回收方法,并通过试验数据的验证分析,为光纤生产领域的氦气回收提供了可靠、可行的依据。     

空调两器检漏氦气的纯化循环使用分析

空调行业在两器生产过程中需要使用氦质谱检漏仪对两器产品进行氦检,检漏过程中使用的氦气通过回收装置循环使用。当循环使用的氦气纯度较低时进行排空并补充高纯度氦气,以提高检漏过程中的氦气纯度。针对排空的低纯度氦气,为满足氦气检漏纯度要求,通过纯化可以将其纯度提高,实现氦气在空调两器检漏过程中的循环使用。     

General atomic's superconducting high field test facility and initial performance

General Atomic has established a high field test facility whose primary mission is to investigate the J-B-T and stability performance margins of commercial NbTi superconductor in the 10 tesla, 4.2 K region. This work is part of the overall DOE/MFE/MAGNETIC SYSTEMS effort to provide an adequate technological base for construction of superconducting toroidal field coils for the next generation of large tokamak fusion devices. The principal components of the facility are the coil/cryostat assembly, the helium refrigerator-liquefier/compressor system, and the gaseous helium recovery and storage system. The epoxy impregnated, layer wound main background field coil generates 8 tesla within its 40 cm diameter bore. The insert background field coil was layer wound with cooling channels provided by "barber pole" mylar conductor insulation. Ten tesla is generated within its 22 cm bore. The initial performance of the facility will be discussed. Future testing calls for operating test coils with implanted heating elements to simulate mechanically induced perturbations. The normal zone growth and recovery behavior will be observed for various disturbance energies. This data will then be compared with results obtained from the transient recovery analysis developed at General Atomic.     

BEPC-Ⅱ低温系统的氦气净化技术

氦气净化技术是国家大科学工程北京正负电子对撞机重大改造(BEPC-Ⅱ)中低温系统的关键技术之一.在充分调研国内外大型低温系统氦气净化技术的基础上,结合自身情况,创造性提出氦气储罐内部处理及真空置换方案,一次性充入氦气,将储罐内氦气不纯度控制在40 vpm之内,同时辅之以80 K外置低温吸附器对氦气储罐内以及冷箱和超导设备端的氦气进行净化.高效而又经济的解决了BEPC-Ⅱ低温系统中的氦气纯度问题,成功地进行了制冷机的验收测试和超导设备的调试及运行.     

Cryogenic helium gas circulation system for advanced characterization of superconducting cables and other devices

A versatile cryogenic test bed, based on circulating cryogenic helium gas, has been designed, fabricated, and installed at the Florida State University Center for Advanced Power Systems (FSU-CAPS). The test bed is being used to understand the benefits of integrating the cryogenic systems of multiple superconducting power devices. The helium circulation system operates with four sets of cryocooler and heat exchanger combinations. The maximum operating pressure of the system is 2.1 MPa. The efficacy of helium circulation systems in cooling superconducting power devices is evaluated using a 30-m-long simulated superconducting cable in a flexible cryostat. Experiments were conducted at various mass flow rates and a variety of heat load profiles. A 1-D thermal model was developed to understand the effect of the gas flow parameters on the thermal gradients along the cable. Experimental results are in close agreement with the results from the thermal model.     

Simple monitoring method for recovery helium gas

A practical and simple method for monitoring recovery helium gas is briefly described. The method makes use of the helium hydrostatic force in the atmosphere. The system described has been performing satisfactorily during the last two years of tests.     

Heliumrückgewinnungsanlagen

Helium Recovery Units The recovery of used helium is particularly useful for meeting the environmental certification requirements under DIN EN ISO 14001 and for saving resources. The units are designed as stand‐alone systems and can recover helium test gas regardless of the leak detection system manufacturer. Depending on the process parameters, up to 98 % of the inert gas can be recovered with helium concentrations between 20 % and 95 %. Significantly reduced helium consumption and therefore considerable cost savings as well as a reduced dependency on helium availability caused by world market fluctuations lead to payback periods shorter than 3 years for this investment.     

D.c. electrical breakdown of saturated liquid helium at 0.1 MPa in the presence of thermally induced bubbles

Breakdown phenomena initiated by thermally generated bubbles in liquid helium are investigated experimentally. The process is considered to be of importance for the design of electrical insulation of superconducting devices. The results of the investigations show that the boiling processes are significantly affected by the application of an electrostatic field and that the bubble shape varies complicatedly with the magnitude of electric field, heater power for generation of bubble and the arrangement of electrode system. Thus the breakdown voltage of liquid helium in a parallel plane gap depends on those experimental conditions. It is argued that the breakdown strength of saturated liquid helium at atmospheric pressure in the presence of thermal bubbles becomes lower than that of saturated helium vapour at the same pressure.     

Calibration of saturated liquid helium weir flowmeter at Fermilab

The flow of saturated liquid helium at 4.2 K was studied in a unique weir flowmeter mounted inside a duct. The objective was to develop a calibration for helium flow rate in the weir, and thereby, making it a viable flowmeter. The weir flowmeter was tested in a liquid helium system at Fermi National Laboratory used for cooling the superconducting magnets in the experimental areas of the site. Unlike for open channel weir devices, the calibration of this flowmeter was influenced by both the liquid flow through the weir notch and the vapor flow over it. The results of this study and the calibration are presented taking into account effects of both liquid and vapor.     

MRI设备氦气放空管道和回收系统的研制

在ＭＲＩ核磁共振成象设备中，通常将超导磁体安装在ＲＦ射频室内（全屏蔽状况）或室外（半屏蔽状况）。本文对上述两种情况下的氦气放空管道和回收系统的工作原理、技术要求和使用情况做了介绍。