摘要:
A method for producing an element comprising a multilayer architecture of which the layers comprise primary channels on the upper faces thereof, said method comprising the following successive steps: (a) producing secondary channels (2) on the lower faces of each layer, each secondary channel (2) being intended to face a primary channel of the adjacent lower layer within the architecture, (b) depositing a coating protecting against oxidation at a temperature of between 500 and 1000°C and against corrosion on all of the lower and upper surfaces of the layers, (c) mechanically sanding or etching the surfaces that are to be assembled, and (d) assembling the various layers by stacking in such a way that each secondary channel (2) of a lower face of an upper layer is facing and is centred on a primary channel (1) of the adjacent lower layer, the width of each secondary channel (2) being greater than the width of the primary channel (1) that it is facing within the architecture.
摘要:
The invention relates to a direct-fired heating method and to a facility for implementing same, According to said method, a load is heated in a furnace (300) with heat generated by burning fuel with an oxidant; the smoke generated is evacuated from the furnace (300), the evacuated smoke (301) containing residual heat energy; residual heat energy is recovered from the evacuated smoke (301) and introduced into a synthesis reactor (100) wherein syngas is produced; and at least part of the syngas is burned in the furnace (300) in order to heat the load.
摘要:
A building brick having a honeycomb structure comprising a porous material, said porous material being obtained by a method comprising the following successive steps: a step a) of preparing quicklime; a step b) of mixing said quicklime, water and silica; a step c) of adding a nucleating agent; a step d) of hydrothermal synthesis to obtain a ceramic mass, and a step e) of drying said ceramic mass obtained in step d).
摘要:
The invention relates to a method for manufacturing a ceramic foam, including the following steps: a) a first step of impregnating a polymer foam having an open porosity with a first suspension of ceramic particles in a solvent; b) a first step of drying the impregnated polymer foam at a temperature between the ambient temperature and 200°C and/or for a duration of between 30 min and 24 hrs; c) a heat treatment of the dried polymer foam comprising: (i) a step of thermally decomposing the dried polymer foam at a temperature of between 150 and 700°C and/or for a duration of between 30 min and 48 hrs; (ii) a step of unbinding the organic compounds contained in the polymer foam from step (i), at a temperature of between 200 and 900°C and/or for a duration of between 30 min and 48 hrs; and (iii) presintering the ceramic particles contained in the polymer foam from step (ii), at a temperature of between 900 and 1400°C and/or for a duration of between 30 min and 6 hrs; d) a second step of impregnating the polymer foam from step c) with a second suspension of ceramic particles in a solvent; e) a second step of drying the polymer foam impregnated in step d); f) a step of sintering the ceramic particles contained in the polymer foam dried in step e), at a temperature of between 1200 and 2000°C and/or for a duration of between 30 min and 6 hrs; the size of the ceramic particles of the second suspension being smaller than the size of the ceramic particles of the first suspension.
摘要:
The invention relates to a microstructure of an alloy for a tube for reformers, having an austenitic matrix structure, characterised in that: i) primary micrometric precipitates in the form of M 23 C 6 -type carbides, where M=Fe, Ni or Cr, and/or M(C,N)-type carbides, where M==Nb or Ti, are formed during the solidification of the alloy; ii) secondary nanometric precipitates in the form of M 23 C 6 -type carbides, where M=Fe, Ni or Cr, and/or M(C,N)-type carbides, where M==Nb or Ti, are formed during the activation of the tube; and iii) between 0.1 and 0.3% of Ni 16 Si7Nb 6 -type intermetallic precipitates is formed during the use of the tube.
摘要翻译:本发明涉及用于重整装置用管的合金的显微组织,其具有奥氏体基体结构,其特征在于:i)M23C6型碳化物形式的初级微米级沉淀物,其中M = Fe,Ni或Cr,和/ 或M(C,N)型碳化物,其中M == Nb或Ti在合金凝固过程中形成; ii)M23C6型碳化物(其中M = Fe,Ni或Cr)和/或M(C,N)型碳化物(其中M == Nb或Ti)在活化期间形成的二次纳米沉淀 管子; 和iii)在使用该管期间形成0.1%至0.3%的Ni 16 Si 7 Nb 6型金属间沉淀物。
摘要:
The invention relates to a heat exchanger-reactor or heat exchanger including at least three stages with on each stage at least one area of millimetric channels that promote the exchange of heat and at least one distribution area upstream and/or downstream of the area of millimetric channels. The invention is characterized in that: said heat exchanger-reactor or heat exchanger is a component devoid of assembly interfaces between the various stages; and the channels in the area of millimetric channels are separated by walls less than 3 mm thick.