Heat exchanger and nozzle of heat exchanger

Abstract

In one embodiment, a heat exchanger is provided with an inside shell, an outside shell, a cooling portion, and an inlet nozzle. The inside shell has an inside space for flowing a fluid, and an opening portion for outflowing the fluid from the inside space. The outside shell covers the inside shell to form a first passage between them to flow the fluid outflowing from the opening portion. The cooling portion is disposed within the inside shell to cool the fluid within the inside space. The inlet nozzle has an inner pipe, an outer pipe, and an outlet pipe. The inner pipe flows the fluid into the inside space through the outside shell. The outer pipe covers the inner pipe to form a second passage between them and has its one end connected to the outside shell to communicate the second passage with the first passage, and its other end connected to the inner pipe on the outside of the outside shell to seal the second passage to flow the fluid partly from the first passage to the second passage. The outlet pipe is connected to the outer pipe to inflow the fluid from the second passage.

1 . A heat exchanger, comprising:
 an inside shell having an inside space for flowing a fluid, and an opening portion for outflowing the fluid from the inside space;   an outside shell covering the inside shell to form a first passage between them to flow the fluid outflowing from the opening portion;   a cooling portion disposed within the inside shell to cool the fluid in the inside space; and   an inlet nozzle having an inner pipe which flows the fluid into the inside space through the outside shell, an outer pipe which covers the inner pipe to form a second passage between them, has its one end connected to the outside shell to communicate the second passage with the first passage, and its other end connected to the inner pipe on the outside of the outside shell to seal the second passage to flow the fluid partly from the first passage to the second passage, and an outlet pipe which is connected to the outer pipe to inflow the fluid from the second passage.   
     
     
         2 . The heat exchanger according to  claim 1 ,
 wherein the heat exchanger is further provided with an outlet nozzle which is connected to the outside shell and outflows the fluid inflowing from the first passage; and   wherein the outlet pipe outflows the fluid, which has inflown from the second passage, to the outlet nozzle.   
     
     
         3 . The heat exchanger according to  claim 1 ,
 wherein the inside shell has a cylindrical shape;   wherein the heat exchanger is further provided with a support portion for supporting one end of the cylindrical shaped inside shell; and   wherein the opening portion is disposed at one end of the inside shell on the side of the support portion.   
     
     
         4 . The heat exchanger according to  claim 1 , further comprising a support portion for supporting the inside shell within the outside shell,
 wherein the inside shell also has an end face spaced from the support portion, and the space between the support portion and the end face functions as a part of the first passage.   
     
     
         5 . The heat exchanger according to  claim 3 , further comprising:
 an outflowing portion which outflows the fluid accumulated at the support portion by condensation of the steam; and   a tube plate which supports the cooling portion,   wherein the support portion which shields one longitudinal end within the outside shell and is disposed on the tube plate side away from the inside shell.   
     
     
         6 . A nozzle of a heat exchanger, comprising:
 an inner pipe which flows a fluid from outside into an inside space of the heat exchanger;   an outer pipe which covers the inner pipe to form a passage between them, and has its one end connected to the heat exchanger to communicate the passage with the inside space and its other end connected to the inner pipe on the outside of the heat exchanger to seal the passage to flow the fluid partly from the inside space to the passage; and   an outlet pipe which is connected to the outer pipe to inflow the fluid from the passage.   
     
     
         7 . The nozzle according to  claim 6 ,
 wherein the heat exchanger has an outlet nozzle for outflowing the fluid which has inflown from the inside space, and the outlet pipe outflows the fluid, which has inflown from the inside space, to the outlet nozzle.