Shell-and-tube heat exchanger with externally-connected tube chambers

Abstract

A shell-and-tube heat exchanger with externally-connected tube chambers includes a tube sheet, a shell, heat exchanging tubes, an inlet externally-connected tube chamber, and an outlet externally-connected tube chamber, wherein: the inlet and outlet externally-connected tube chambers are respectively fixed to corresponding positions of the tube sheet, two flow guiding devices are respectively located in the inlet and outlet externally-connected tube chambers, the two flow guiding devices respectively have two cavities therein, multiple flow guide channels outwardly extend from the cavities to the tube sheet and communicated with the tube sheet; one cavity of the outlet externally-connected tube chamber is communicated with a tube side outlet pipe, and one cavity of the inlet externally-connected tube chamber is communicated with a tube side inlet pipe. The shell-and-tube heat exchanger is reasonable in design, can effectively improve the sealing performance and reduce the tube side pressure drop, and has broad application prospects.

What is claimed is: 
     
         1 . A shell-and-tube heat exchanger with externally-connected tube chambers, comprising a tube sheet, a shell, heat exchanging tubes, an inlet externally-connected tube chamber, an outlet externally-connected tube chamber, wherein: the inlet externally-connected tube chamber and the outlet externally-connected tube chamber are respectively fixed to two corresponding positions of the tube sheet, two flow guiding devices are respectively located within the inlet externally-connected tube chamber and the outlet externally-connected tube chamber, the two flow guiding devices respectively have two cavities therein, multiple flow guide channels outwardly extend from the two cavities to the tube sheet for forming multiple ports which are respectively corresponding to the heat exchanging tubes; one cavity of the outlet externally-connected tube chamber is communicated with a tube side outlet pipe, and one cavity of the inlet externally-connected tube chamber is communicated with a tube side inlet pipe. 
     
     
         2 . The shell-and-tube heat exchanger with the externally-connected tube chambers, as recited in  claim 1 , wherein a sieve structure, having multiple uniformly distributed holes, is located in the cavity of the inlet externally-connected tube chamber; the sieve structure has a groove, an opening of the groove of the sieve structure faces towards the tube side inlet pipe. 
     
     
         3 . The shell-and-tube heat exchanger with the externally-connected tube chambers, as recited in  claim 2 , wherein the holes are circular, triangular or polygonal. 
     
     
         4 . The shell-and-tube heat exchanger with the externally-connected tube chambers, as recited in  claim 1 , further comprising a split-ranging externally-connected tube chamber which is fixed to a split-ranging side tube sheet; a U-shaped flow guide apparatus, having multiple U-shaped flow channels therein, is located in the split-ranging externally-connected tube chamber; two ends of all the U-shaped flow channels extend to the split-ranging side tube sheet and are respectively connected with the heat exchanging tubes. 
     
     
         5 . The shell-and-tube heat exchanger with the externally-connected tube chambers, as recited in  claim 2 , further comprising a split-ranging externally-connected tube chamber which is fixed to a split-ranging side tube sheet; a U-shaped flow guide apparatus, having multiple U-shaped flow channels therein, is located in the split-ranging externally-connected tube chamber; two ends of all the U-shaped flow channels extend to the split-ranging side tube sheet and are respectively connected with the heat exchanging tubes. 
     
     
         6 . The shell-and-tube heat exchanger with the externally-connected tube chambers, as recited in  claim 3 , further comprising a split-ranging externally-connected tube chamber which is fixed to a split-ranging side tube sheet; a U-shaped flow guide apparatus, having multiple U-shaped flow channels therein, is located in the split-ranging externally-connected tube chamber; two ends of all the U-shaped flow channels extend to the split-ranging side tube sheet and are respectively connected with the heat exchanging tubes. 
     
     
         7 . The shell-and-tube heat exchanger with the externally-connected tube chambers, as recited in  claim 4 , wherein the U-shaped flow guide apparatus is integrally formed or assembled to be a whole after being manufactured in a form of blocks-divided. 
     
     
         8 . The shell-and-tube heat exchanger with the externally-connected tube chambers, as recited in  claim 5 , wherein the U-shaped flow guide apparatus is integrally formed or assembled to be a whole after being manufactured in a form of blocks-divided. 
     
     
         9 . The shell-and-tube heat exchanger with the externally-connected tube chambers, as recited in  claim 6 , wherein the U-shaped flow guide apparatus is integrally formed or assembled to be a whole after being manufactured in a form of blocks-divided. 
     
     
         10 . The shell-and-tube heat exchanger with the externally-connected tube chambers, as recited in  claim 4 , wherein the flow guide devices and the U-shaped flow guide apparatus are made of metallic, ceramic or polyester materials. 
     
     
         11 . The shell-and-tube heat exchanger with the externally-connected tube chambers, as recited in  claim 6 , wherein the flow guide devices and the U-shaped flow guide apparatus are made of metallic, ceramic or polyester materials. 
     
     
         12 . The shell-and-tube heat exchanger with the externally-connected tube chambers, as recited in  claim 9 , wherein the flow guide devices and the U-shaped flow guide apparatus are made of metallic, ceramic or polyester materials. 
     
     
         13 . The shell-and-tube heat exchanger with the externally-connected tube chambers, as recited in  claim 4 , wherein a SK static mixer or other gas-liquid mixing devices are set in the tube side inlet pipe. 
     
     
         14 . The shell-and-tube heat exchanger with the externally-connected tube chambers, as recited in  claim 9 , wherein a SK static mixer or other gas-liquid mixing devices are set in the tube side inlet pipe. 
     
     
         15 . The shell-and-tube heat exchanger with the externally-connected tube chambers, as recited in  claim 12 , wherein the heat exchanging tubes are internal thread tubes, an inner wall thereof has positive and negative spiral alternately-circulating continuous projections or grooves. 
     
     
         16 . The shell-and-tube heat exchanger with the externally-connected tube chambers, as recited in  claim 4 , wherein a draft tube is located at a shell side import and export of the shell. 
     
     
         17 . The shell-and-tube heat exchanger with the externally-connected tube chambers, as recited in  claim 9 , wherein a draft tube is located at a shell side import and export of the shell. 
     
     
         18 . The shell-and-tube heat exchanger with the externally-connected tube chambers, as recited in  claim 13 , wherein a draft tube is located at a shell side import and export of the shell. 
     
     
         19 . The shell-and-tube heat exchanger with the externally-connected tube chambers, as recited in  claim 14 , wherein a draft tube is located at a shell side import and export of the shell. 
     
     
         20 . The shell-and-tube heat exchanger with the externally-connected tube chambers, as recited in  claim 15 , wherein a draft tube is located at a shell side import and export of the shell.