Browse Topic: Chemical processing
This specification covers the requirements for electrodeposited bronze plate and its subsequent removal
This standard establishes definitions, guidelines, and requirements governing materials (e.g., alloy and heat treat condition) allowed for use in chemical process test specimens when requirements call for a generic class of alloy
Liberation of oxygen from the mineral ilmenite (FeTiO3), which may be found on the Moon, Mars, or asteroids, is inefficient due to the abundance of other minerals in the excavated regolith that are present but not needed during the chemical processing. Energy for the reduction reaction is in short supply on the lunar, Martian, and asteroid surfaces. The ilmenite should be separated from other minerals to simplify and improve the process efficiency. Lunar and planetary basaltic lavas contain ilmenite, but they consist only of 12 to 20 percent by weight
The task of chemical process operator in the parts cleaning area is generally considered unskilled labor and in the past, little or no training had been provided or recommended. Since overhaul cleaning is a critical process step prior to visual and fluorescent penetrant inspection processes, consideration must be given to minimum levels of training for these process operators. It is the responsibility of the department supervisor to ensure that all personnel within the department are trained to acceptable level in all general aspects of health and safety and basic operating procedures. This document is intended to augment the local quality control system which will control the application and frequency of the guidelines stated within
This standard establishes definitions, guidelines, and requirements governing the specific material (e.g., alloy and heat treat condition) to be used for chemical process test specimens when requirements call for “the same generic class of alloy
Microwave heating is an important process for many commercial, industrial, and household applications. Industrial microwave ovens are widely used for chemical processing, agri-food, medical products, and consumer products applications. Resonant cavities are often used to speed up chemical reactions, and have the advantages of being small and producing efficient distributions of microwave energy. These multimode cavities can be considered as batch ovens where products can be treated; alternatively, microwave tunnels with multiple waveguides can be used to provide continuous production
A compact, lightweight heat exchanger has been designed to be fault-tolerant in the sense that a single-point leak would not cause mixing of heat-transfer fluids. This particular heat exchanger is intended to be part of the temperature-regulation system for habitable modules of the International Space Station and to function with water and ammonia as the heat-transfer fluids. The basic fault-tolerant design is adaptable to other heat-transfer fluids and heat exchangers for applications in which mixing of heat-transfer fluids would pose toxic, explosive, or other hazards: Examples could include fuel/air heat exchangers for thermal management on aircraft, process heat exchangers in the cryogenic industry, and heat exchangers used in chemical processing
A device based on the transport of water through a membrane to a vacuum has been developed for dehumidifying a stream of air in the life-support system of a spacecraft or space suit. The device could also be adapted to terrestrial use in dehumidification of air in an air-conditioning stream or drying of air or another gas in a chemical processing stream. The design of this device is an advance in that it decreases (relative to prior designs) the weight, power consumption, and volume of the dehumidifier in the life-support system or other gas-circulation system in which the device is used. In the case of a spacecraft or space suit, the design thereby also increases safety and health margins. Although the membranes in the device must be replaced periodically and a vacuum source is essential for its operation, no other dehumidifier works as well in a spacecraft or space suit
Network Monitor and Control (NMC) Automation Assembly (AA) is a component of the NMC software system, which is used for controlling an antenna connection in the Deep Space Network. NMC AA could also be adapted to commercial applications (e.g., chemical processing), in which human operators must monitor and control multiple equipment subsystems simultaneously in real time. NMC AA is designed to reduce costs and increase efficiency and capacity by relieving human operators of labor-intensive and error-prone routine spacecraft-tracking activities. NMC AA includes software engines that communicate between automation scripts and DSN subsystems. The automation scripts are developed in the Automation Language for Managing Operations (ALMO), which is a programming language that includes specialized constructs for interacting with the subsystems. The contents of the scripts represent knowledge of operations gathered from DSN operators and engineers. The ALMO scripts are organized in a temporal
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