Method for manufacturing hydrogen generator

Abstract

A method for manufacturing a hydrogen generator of the present invention is a method for manufacturing a hydrogen generator including: a water evaporator which has an inner tube, an outer tube, and a spacer disposed between the inner tube and the outer tube and in which a passage defined by the spacer is supplied with water and a raw material and heated to generate a material gas containing steam; and a reformer which has catalyst and in which the catalyst is heated to generate the material gas containing the steam from the material gas containing the steam, and the method includes: a disposing step (S 2 ) of disposing the spacer between the inner tube and the outer tube; and a tube expanding step (S 3 ) of expanding the inner tube to form the passage defined by the spacer.

1 . A method for manufacturing a hydrogen generator comprising: a water evaporator which includes an inner tube, an outer tube, and a spacer disposed between the inner tube and the outer tube and in which a passage defined by the spacer is supplied with water and heated to generate steam; and a reformer which includes reforming catalyst and in which the steam and a raw material flow through the reforming catalyst to generate a reformed gas containing hydrogen, the method comprising:
 a disposing step of disposing the spacer between the inner tube and the outer tube; and   a tube expanding step of expanding the inner tube to form the passage defined by the spacer.   
   
   
       2 . The method according to  claim 1 , wherein: the spacer is a rod member having a spiral shape; and the passage having a spiral shape is formed between the inner tube and the outer tube. 
   
   
       3 . The method according to  claim 2 , wherein the rod member is a rod having a circular cross section or an oval cross section. 
   
   
       4 . The method according to  claim 1 , wherein a cross-sectional area of the passage, defined by the spacer, is larger on a downstream side than on an upstream side. 
   
   
       5 . The method according to  claim 1 , wherein the disposing step includes: a first step of temporarily disposing the spacer on an inner peripheral surface of the outer tube; and a second step of disposing the inner tube on an inner peripheral side of the spacer after the first step. 
   
   
       6 . The method according to  claim 1 , wherein the disposing step includes: a first step of temporarily disposing the spacer on an outer peripheral surface of the inner tube; and a second step of disposing the outer tube on an outer peripheral side of the spacer after the first step. 
   
   
       7 . The method according to  claim 1 , wherein a material of the inner tube has a higher stretching property than a material of the outer tube.