摘要:
Apparatus and methods are provided for converting methane in a feed stream to acetylene. A hydrocarbon stream is introduced into a supersonic reactor and pyrolyzed to convert at least a portion of the methane to acetylene. The reactor effluent stream may be treated to convert acetylene to another hydrocarbon process.
摘要:
The erosion-prone sections of the tubes in a circulating fluidized bed boiler are provided with a locally thickened sidewall without forming discontinuities on the outer surface of the tubes. This can be accomplished, for example, by replacing the erosion prone portion of the tube with a section having a smaller inside diameter, but the same outside diameter, or by replacing the erosion prone portion of the tube with a section having a thicker sidewall, but the same inside diameter, and smoothing over the outside discontinuity with an alloy coating. A useful alloy coating is also disclosed which can be used for this and other applications.
摘要:
Ceramic layers are often used for heat insulation in a layer system, and have a high porosity therefore, The inventive porous ceramic heat insulating layer has a particular pore size distribution such that it has a high expansion tolerance event at temperatures higher than 1200° C.
摘要:
The erosion-prone sections of the tubes in a circulating fluidized bed boiler are provided with a locally thickened sidewall without forming discontinuities on the outer surface of the tubes. This can be accomplished, for example, by replacing the erosion prone portion of the tube with a section having a smaller inside diameter, but the same outside diameter, or by replacing the erosion prone portion of the tube with a section having a thicker sidewall, but the same inside diameter, and smoothing over the outside discontinuity with an alloy coating. A useful alloy coating is also disclosed which can be used for this and other applications.
摘要:
A heatshielded article includes a support 18 and at least one heatshield 20 secured adjacent to the support. The heatshield includes a shield portion 28 spaced from the support. The shield portion includes a hot side 30 and an uncoated cold side 32. A projection projects from an origin 36 at the shield portion to a terminus 38 remote from the shield portion. The terminus includes a protective coating 64 along at least a portion of its length.
摘要:
A method for monitoring and reducing corrosion in furnace boiler tubes measures electrochemical noise associated with corrosion mechanisms while corrosion is occurring at the surface of the tubes as they are exposed to combustion products. This noise is detected using a probe at the boiler waterwall surface that is connected to a corrosion monitor. The monitor contains a computer and software which determines a corrosion rate from the measured electrochemical noise. That rate is compared to a standard to determine if the rate is within acceptable limits. If not, the operator of the furnace or an Adaptive Process Controller (APC) is notified and adjusts one or more burners to change the combustion products that are responsible for the corrosion. Such an adjustment could be made by changing the amount of air or fuel being provided to the burner or other air slots or air ports. After that adjustment is made the furnace emissions could be checked for NOx, SOx and particulate emissions and further adjustments could be made to the burners to reduce those emissions.
摘要:
A machine component including a base body produced from a base material is provided. The base body is equipped in a partial region of the surface thereof with a plating made of an application material having a greater hardness and/or viscosity as compared to the base material. The plating is foamed by a number of plating elements that are applied to the base body in the longitudinal direction thereof in a tilted manner relative to the main flow direction of a hot gas flowing through the base body.
摘要:
Some industrial or fabrication processes generate effluent gas streams that require scrubbing. Scrubbing may include the use of one or more gases to abate the effluents for safer release into the environment. Systems and methods described herein provide a liquid-enclosed reaction chamber where an extended reaction zone or more than one reaction zone is formed. By having an extended reaction zone or more than one reaction zone, the effluent gas stream and the products of upstream reaction zones can be more completely abated. The reaction zones are formed by adding one or more gas ports into the reaction chamber downstream of a main burner nozzle.
摘要:
Some industrial or fabrication processes generate effluent gas streams that require scrubbing. Scrubbing may include the use of one or more gases to abate the effluents for safer release into the environment. Systems and methods described herein provide a liquid-enclosed reaction chamber where an extended reaction zone or more than one reaction zone is formed. By having an extended reaction zone or more than one reaction zone, the effluent gas stream and the products of upstream reaction zones can be more completely abated. The reaction zones are formed by adding one or more gas ports into the reaction chamber downstream of a main burner nozzle.
摘要:
A material mixture for producing a fireproof material, including spinel and zirconium oxide and a coarse-grained fraction with a weight fraction of greater than 50% and a fine-grained fraction, wherein the coarse-grained fraction includes coarse grains with dimensions larger than 20 μm and the fine-grained fraction includes fine grains with dimensions smaller than 20 μm.