XIV New Patents

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A P P A R A T U S F O R M E L T I N G S C R A P

Walter Maschlanka, markus Hubig, Maggenau, Federal Republic Of Germany assigned to Deut- sche Voest-Alpine Industrieanlagenbau Gmb H

A process for melting metal scrap, particularly steel scrap or such high-melting charge material in a shaft furnace operated in cokeless manner by means of fluid fuels is described. The furnace shaft used for carrying out the process is separated from the furnace hearth connected to the bottom thereof by means of a cooled grate arrangement. The burners issue substantially vertically to the longitudinal axis of the shaft into the furnace and the combustion air is recupera- tively preheated by means of the shaft furnace waste gases. The amount of heat introduced into the melting unit by means of the burners is sub- divided in dosable manner into a component drawn off from the furnace shaft and a compo- nent remaining in the furnace hearth. For this purpose the radiating surface of the wall lining in the furnace hearth is between 1.5 and 3.5 m2, particularly 2 and 2.8 m2 ton of molten metal produced. The radiation-active, average layer thickness of the gas in the furnace hearth is bet- ween 1.5 and 3.5 m, particularly 2 and 2.5 m and the inlet temperature of the waste gas into the recuperator is controlled as a function of the charge material bed height in the furnace shaft.

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fluid jet nozzles which produce longitudinal slits and transverse cuts in the pulp mat as the mat travels past the nozzle bank. The removal section also has a catch trough disposed at the side of the mat opposite the nozzles for receiving the fluid sprayed from the nozzles through the mat and also for receiving the rectangular sections cut from the mat, the catch trough being further equipped with flush water and effluent pipe con- nections to facilitate disposal of the removed sec- tions of the mat.

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S Y S T E M A N D P R O C E S S F O R A N A E R O B I C D I G E S T I O N O F

W A S T E M A T E R I A L S

Stewart Erickson

The invention relates to a system and process for production of carbon dioxide, methane, and nitrogen rich fertilizers by anaerobic digestion of waste materials. The waste materials are digested in rotary digestion modules, and the chemical composition of the organic materials in the modules is monitored to determine the progress of the decomposition.

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C A R B O N D I O X I D E S T O R A G E A N D D I S P E N S I N G A P P A R A T U S

A N D M E T H O D

A P P A R A T U S F O R P U L P C O N T A M I N A N T R E M O V A L

Michael D Hoyle, Charles V Snyder assigned to Carbonic Technologies Inc

Randall L Bone, Albert P Kriek, Eric D Myracle, Don Rogers assigned to P H Glatfelter Company

Apparatus and method for automatically detec- ting and removing contaminant particles from a moving pulp mat are provided, detection of the particles being accomplished using a light source for transmitting light to the pulp mat, a light detecting means for detecting decreases in the in- tensity of light across the pulp mat correspon- ding to positions or locations of contaminant particles in the mat, and a control package for generating signals corresponding to the detected positions to be used in the contaminant removal proceses, removal of the palticles being ac- complished by cutting a rectangular section con- taining the particle from the mat using a bank of

A carbon dioxide storage and dispensing ap- paratus and method for storing carbon dioxide which is characterized by a pressure vessel designed to hold carbon dioxide liquid and vapor, which pressure vessel is insulated to con- trol heat input and includes a refrigeration sys- tem, fill and withdrawal piping, a fill line mixer provided in the fill line for rapidly mixing in- coming liquid carbon dioxide with carbon diox- ide in the vapor phase, a volume gauge, heating rod for introducing heat into the vessel and as- sociated operating and safety control devices. The pressure vessel may be characterized by a horizontal or vertical tank and is designed to provide the user with an uninterrupted supply of carbon dioxide gas or liquid, while at the same time overcoming many of the problems as- sociated with currently available carbon dioxide