公开(公告)号：WO2021242309A1

公开(公告)日：2021-12-02

申请号：PCT/US2020/064756

申请日：2020-12-14

Applicant: PRAXAIR TECHNOLOGY, INC.

Inventor： XU, Zhengrong ,  PROSSER, Neil, M. ,  HANDLEY, James, R. ,  BILLINGHAM, John, F.

IPC: F25J3/04

Abstract: Enhancements to a dual column, nitrogen producing cryogenic air separation unit with waste expansion are provided. Such enhancements include an improved air separation cycle that uses: (i) three condenser-reboilers; (ii) a reverse reflux stream from the condenser-reboiler associated with the lower pressure column to the higher pressure column; and (iii) a recycle stream of a portion of the vapor from one or more of the condenser-reboilers that is recycled back to the incoming feed stream and or the compressed purified air streams to yield improvements in the performance of such dual column, nitrogen producing cryogenic air separation units in terms of overall nitrogen recovery as well as power consumption compared to conventional dual column, nitrogen producing cryogenic air separation units employing waste expansion.

公开(公告)号：WO2021126513A1

公开(公告)日：2021-06-24

申请号：PCT/US2020/062665

申请日：2020-12-01

Applicant: PRAXAIR TECHNOLOGY, INC.

Inventor： PROSSER, Neil, M. ,  HANDLEY, James, R. ,  DE CASTRO COSTA, Ricardo, Dutra ,  BILLINGHAM, John, F. ,  PARSNICK, David, R.

IPC: F25B9/00 ,  F25B9/06 ,  F25J1/00 ,  F25B9/002 ,  F25B9/004 ,  F25J1/0012 ,  F25J1/0015 ,  F25J1/0037 ,  F25J1/004 ,  F25J1/0042 ,  F25J1/0045 ,  F25J1/005 ,  F25J1/0052 ,  F25J1/0057 ,  F25J1/007 ,  F25J1/0072 ,  F25J1/0202 ,  F25J1/0204 ,  F25J1/0236 ,  F25J1/0249 ,  F25J1/0265 ,  F25J1/0288 ,  F25J1/0292 ,  F25J1/0294 ,  F25J2220/02 ,  F25J2230/30 ,  F25J2270/06 ,  F25J2270/16

Abstract: Various systems and methods for suppling cryogenic refrigeration to supercomputing applications such as quantum computing operations are provided. The disclosed systems and methods are flexible, efficient and scaleable to meet the cryogenic refrigeration requirements of many supercomputing applications. The disclosed systems and methods include: (i) a liquid nitrogen based integrated refrigeration system that integrates a nitrogen refrigerator with a refrigeration load circuit; (ii) a closed loop liquid nitrogen based refrigerator that provides cooling to the refrigeration load circuit via indirect heat exchange between liquid nitrogen in a nitrogen refrigerator and a separate refrigerant in a closed-loop refrigeration load circuit; and (iii) a liquid air based integrated refrigeration system that integrates an air intake system with a refrigerator and a refrigeration load circuit.

公开(公告)号：WO2012173988A1

公开(公告)日：2012-12-20

申请号：PCT/US2012/042047

申请日：2012-06-12

Applicant: PRAXAIR TECHNOLOGY, INC. ,  NOVAK, Richard, A. ,  DE GRACIA, Monica ,  URRUTICOECHEA, Andoni ,  LARREA, Asun ,  BILLINGHAM, John, F.

Inventor： NOVAK, Richard, A. ,  DE GRACIA, Monica ,  URRUTICOECHEA, Andoni ,  LARREA, Asun ,  BILLINGHAM, John, F.

IPC: C02F3/00 ,  C02F3/12

CPC classification number: C02F3/006 ,  C02F3/1268 ,  C02F3/1273 ,  C02F2209/001 ,  C02F2209/003 ,  C02F2209/006 ,  C02F2209/02 ,  C02F2209/03 ,  C02F2209/22 ,  C02F2209/40 ,  C02F2303/10 ,  C02F2303/16 ,  C02F2303/20 ,  Y02W10/15 ,  Y02W10/30

Abstract: An advanced control system for a membrane bioreactor based wastewater treatment plant is disclosed. The disclosed control system comprises a membrane bioreactor (MBR) system and a microprocessor based controller that receives signals corresponding to selected measured MBR parameters and calculates or estimates one or more MBR calculated parameters including Membrane Conductivity (Fxc); and/or Oxygen Uptake Rate (OUR). The microprocessor based controller compares one or more calculated or estimated MBR parameters to prescribed setpoints or desired ranges and governs one or more pumps and valves in the MBR system to adjust the cleaning cycle in the MBR system, the MBR flows in the MBR system, or the influent flow to the biological basin in response thereto.

Abstract translation: 公开了一种基于膜生物反应器的废水处理设备的先进控制系统。 所公开的控制系统包括膜生物反应器（MBR）系统和基于微处理器的控制器，其接收与所选择的测量MBR参数相对应的信号，并计算或估计包括膜电导率（Fxc）的一个或多个MBR计算参数; 和/或吸氧率（OUR）。 基于微处理器的控制器将一个或多个计算或估计的MBR参数与规定的设定值或期望范围进行比较，并且控制MBR系统中的一个或多个泵和阀，以调整MBR系统中的清洁循环，MBR系统中的MBR流动，或 响应于生物盆的流入物流。