摘要:
Methods of treatment of cyanide-containing waste are provided. In particular, methods for treatment of spent potliner prior to landfill disposal are provided. These methods, which involve treatment of the waste with a mixture containing an aqueous oxidizing solution and an agent, such as magnesium chloride, that increases the oxidation potential of the solution, can be performed at ambient temperature and pressure.
摘要:
This relates to a furnace that is useful in safely detonating or demilitarizing munitions or explosives, particularly small caliber munitions. The preferred variation includes a series of chambers having a set of runners or tracks passing amongst the various chambers to allow movement of the munitions from chamber to chamber in trays. The first chamber is heated in such a way so that a tray of munitions placed on the runners in this chamber are baked and detonated. After the detonation is generally complete, the tray containing the then-detonated munition fragments is slid through an opening at the end of that heated detonation chamber into a first cooling chamber. Generally, this movement takes place by addition of another tray containing non-detonated munitions into the first chamber. The furnace may also contain a second cooling chamber to assure both that the subject munitions are detonated and to allow then-safe exiting of the completely detonated munitions from the second cooling chamber onto an external extension of the track. The furnace is configured so that the munitions, whether detonated or not, remain in trays which may be slid through an operating unit without substantial hazard. Also included is a scrubber for removing noxious or deleterious components of gases produced by the detonation before it is passed into the atmosphere. Finally, this includes a method of using a chambered furnace to detonate small arms munitions or other explosives.
摘要:
According to the present invention, a fatty acid having 10 or more carbon atom, alcohol having 12 or more carbon atom, ester of a linear saturated fatty acid having 14 or more carbon atoms and monohydric alcohol, ester of a linear saturated fatty acid having 14 or more carbon atoms and polyhydric alcohol, ester of a fatty acid having 16 or more carbon atoms and glycerine, and the like are buried into soil to decrease nitrate nitrogen and volatile organic compounds in soil and groundwater, for the purpose of decreasing nitrate nitrogen and volatile organic compounds in soil and groundwater wherein on site treatment is possible, a high biological denitrification ability and a volatile organic compound decreasing ability are provided and secondary pollution by releasing of organic matter and nitrogen into environment is extremely small.
摘要:
The invention relates to a fully transposed composite superconductor (2) that can be especially used for AD devices and that contains subconductors (3j) composed according to the Roebel bar principle and containing high Tc superconducting material. The aim of the invention is to provide subconductors, that can be laterally bent in the plane of their width B so that the bending radius R is more than 100 times the width B and the bending zone length H is more than 20 times the width B. The inventive device for producing the conductor (2) comprises means disposed in series for combining, bending, assembling to a Roebel bar, and fixating the subconductors.
摘要:
Chlorine-containing waste is processed inside a heating device, an alkali metal compound and a calcium compound are given into the heating device while the temperature of a solid phase inside the heating device is maintained at 400 to 1500null C., chlorine that is contained in the chlorine-containing waste and that has not been bound by the alkali metal compound is bound in the solid phase by the calcium compound, and chlorine is converted into alkali metal chloride from calcium chloride generated in the course of the processing of the chlorine-containing waste.
摘要:
The present invention relates to a plasma process and appropriate equipment well adapted for eliminating toxic or hazardous organic compounds, such as petroleum, oils, pesticides, herbicides and various hydrocarbons, orginitated from petrochemical spills or inappropriate discard/handling, from different materials, such assail, sludges; the process and appropriate equipment can also be used to remove the hydrocarbons contained in the sludge formed at the bottom of petroleum storage tanks. The plasma process, with the appropriate equipment, object of the invention, has the following advantages as compared to the other processes used to treat similar materials: removal of the contaminants to less than 0.1% in weight of the soil or sludge; continuous operation; possibility of recovering the contaminants when desired; high energy efficiency of the process; and insignificant amount of gases to be treated. The plasma process utilizes a plasma system for providing enough energy to the contaminated soil or sludge for the hydrocarbons to volatilize, keeping the temperature of the process between 400 and 900null C. The volatilized compounds after leaving the plasma reactor are collected in condensers, where the hydrocarbons can be recovered, in the form of a liquid hydrocarbon (oil). The contaminated material is continuously fed into the reactor from one end, while the clean material is removed from the other end of the reactor. The atmosphere inside the plasma reactor is maintained neutral or reducing in order to prevent the oxidation of the hydrocarbons. The equipment comprises a feeding system, a static reactor, a rotating reactor, a rotating screw for transporting the residues inside the reactor, a plasma system, a tube for the removal of the volatilized compounds, a condenser located outside the plasma reactor, an exit of clean material from the reactor and a silo for collecting the clean material.
摘要:
The subject invention provides a potentially economically viable process for the microwave destruction of contaminated waste consisting essentially of chemical and biological agents and harmful medical waste by employing carbonaceous materials to enhance the efficiency of the microwaves while keeping the bulk temperature down to a modest rise.
摘要:
Method and apparatus for containing, transporting, and storing or disposing of radioactive machinery, including decommissioned nuclear reactor pressure vessels. An improved, economically-produced container is provided which allows easier handling and packaging of machinery within plants where the machinery has been installed, and which provides improved shock absorption and attenuation characteristics, especially when packaging is complete. A reactor pressure vessel or similar item is disconnected from the remainder of the plant and external fittings are trimmed as close to flush with item's exterior as practicable. A storage and containment canister, optionally cut into at least two sections to ease handling and packaging, is placed nearby. The pressure vessel head or any other low-radioactive items are removed, and insulation and other items removed from the outside of the item are placed inside the item's body. The item body is placed into a lower section of the canister and sealed, and detached canister sections are reattached. Gaps between the canister and the RPV body and preferably the interior of the RPV body are filled with grout or low denisity cellular concrete. The canister is closed, and the pressure vessel head or other removed portions are secured to the outside of the canister. Optionally the canister exterior is sealed with a metalizing spray. The complete package is transported for storage or disposal.
摘要:
An improved non-thermal plasma apparatus for treating NOx bearing gas streams has a plasma reactor and an inlet and outlet. The plasma reactor is equipped with a plurality of dielectrically-coated electrodes between which a selected voltage is applied to generate a non-thermal plasma environment for driving selected electro-chemical reactions. A predefined voltage is applied across the electrodes to create microdischarges in the exhaust gas stream to convert nitric oxides into primarily nitrogen dioxides. The electrodes are constructed of metal plates, and a fluoropolymeric material, such as fluorocarbon, as the dielectrics. The electrodes are arranged in parallel formation and alternating between positive and negative charges. In one embodiment, fluoropolymeric spacers are positioned between adjacent electrodes and may be configured with selected thicknesses to provide a plurality of desired reaction zones or gaps therebetween. In another embodiment, the electrodes are supported on a specially configured fluoropolymeric (e.g., fluorocarbon) insulators adapted for placement inside the plasma reactor to provide a plurality of gaps. With a plurality of gaps, the total non-thermal plasma environment is expanded to increase the overall flow rate of the exhaust gas or throughput of the apparatus.
摘要:
A method for reducing leaching and bioaccessibility of a heavy metal from particulate matter includes the steps of treating the particulate matter with phosphate, chloride and iron additives; wetting the additive-containing particulate matter with water; and incubating the particulate matter at a temperature above ambient temperature for a time sufficient to achieve the goals of the invention.