Abstract:
Methods and systems for producing activated carbon from a particulate coal feedstock that involve one or more of the introduction of a buffering gas, a moisture spray, a finest carbon fraction as a fuel, and certain gas ratios. Different methods and system configurations allow the production of activated carbon or other heat-treated carbons while concurrently avoiding adverse reaction conditions.
Abstract:
Methods and systems for producing activated carbon from a particulate coal feedstock that include the introduction of an activation medium such that the water content of the coal feedstock is equal to or greater than that of the feedstock's naturally occurring state. Different methods and system configurations allow the production of activated carbon or other heat-treated carbons while concurrently avoiding adverse reaction conditions.
Abstract:
A thermal distribution and regulation system for a garment that includes a self-contained heat source, such as a catalytic heat source. A heat manifold extends about a surface of the heat source and is mechanically adjusted relative to the surface of the heat source to control the contact surface area between the heat source and heat manifold to regulate heat conducted from the heat source. The heat manifold is configured to engage the surface of the heat source at more than one predetermined location to prevent inadvertent movement between the heat source and heat manifold. The system also includes a plurality of heat conductors coupled to the heat manifold and affixed to the garment. An end of each heat conductor is coupled to the heat manifold for conducting heat from the heat manifold to the garment to warm the garment.
Abstract:
A tracking radar system comprising an aerial arrangement having a plurality of outputs, means for deriving from the aerial outputs a sum signal representative of the sum of the aerial outputs and a difference signal representative of the direction of a target relative to the aerial, a receiver for processing said sum and difference signals to produce corresponding intermediate frequency sum and difference signals, means for comparing the intermediate frequency sum signal with the output of an oscillator in a first phase-locked loop and using the resulting signal to control the oscillator frequency so as to cause the oscillator to lock on to the frequency of the intermediate frequency sum signal, a phase-sensitive detector for comparing the intermediate frequency difference signal with the output of the oscillator to produce an output signal representative of the phase difference between the sum and difference signals, and bandwidth alteration means responsive to the sum signal to alter the bandwidth of the first phase-locked loop.
Abstract:
A signal acquisition circuit for a missile guidance system has a phase lock loop which is responsive to incoming signals received from a target and will lock on to the frequency of the received signal. The bandwidth of the phase lock loop is altered in dependence on the signal being received in order to distinguish between a valid target and noise.
Abstract:
A phase-lock loop system with particular use in radar tracking systems is disclosed. From a number of input signals of varying frequencies such as a carrier frequency and several side band frequencies the system can lock into phase and frequency with the input which has the largest amplitude by sweeping across a predetermined range of frequencies and allowing the phase-lock loop to operate only when a predetermined amplitude is exceeded.
Abstract:
Methods and systems for producing activated carbon from a particulate coal feedstock that include the introduction of a buffering gas, a moisture spray, a finest carbon fraction as a fuel, and certain gas ratios. Different methods and system configurations allow the production of activated carbon or other heat-treated carbons while concurrently avoiding adverse reaction conditions.
Abstract:
Methods for producing devolatilized and/or activated carbon in a reactor or reaction vessel of a heat treatment system from a suitable carbonaceous feedstock by introducing the feedstock into the reactor tangentially at a rotational velocity of at least 90 RPM. The methods include the steps of providing a combination of conveying means and a gas flow having various compositions and creating distinct carbonaceous feedstock material flow patterns and process conditions such that the feedstock is conveyed through the reactor or reaction vessel and heated via combustion, thereby producing activated carbon or other heat-treated carbons while concurrently avoiding adverse reaction conditions. Single and two-stage heat treatment systems may be used to heat a carbon feedstock, to which one or more industrial minerals may be added to co-produce compositions such as lime with the heat-treated carbon.
Abstract:
The technology here described contemplates storing an incoming instant message and determining the subsequent deletion of the stored message by distinguishing whether the message has been noticed by the user, even though there may have been a system or program failure between the time of the message's arrival and the time that the user attends to the message.
Abstract:
A self-contained calcination plant is enclosed in a feed-storage silo. The plant consists of a vertical reactor, a separation cyclone and a pair of heat exchangers connected by appropriate piping and immersed in the feed material stored in powdery form in the silo. A positive displacement blower creates an air stream that is preheated in one of the heat exchangers and fed in part to a gas burner and in part to a feed pipe at the bottom of the reactor. The feed material is kept in a fluidized state in the silo by air heated in the other heat exchanger and blown upward from the bottom of the storage compartment, from where the material is dropped into the feed pipe through rotary valves prior to injection into the reactor. The feed pipe is connected tangentially to the reactor so as to produce an upward swirling flow around the burner's flame. The fluidized reaction products are passed through a cyclone to separate the calcined oxides from the hot gases, which are then fed serially through the heat exchangers to preheat the process air used for the blower and the storage compartment. The solid product is recovered from the bottom of the cyclone. The entire plant is enclosed in the silo and, during operation, all units are immersed in the fluidized hot feed material that provides excellent heat transfer among all components and a sufficiently uniform temperature in the reactor to produce optimal calcination.