CN2196772Y

CN2196772Y - Tube-casing type high-efficiency vapour-liquid heat exchanger

Info

Publication number: CN2196772Y
Application number: CN 94229130
Authority: CN
Inventors: 荣秀惠; 王德全; 王维启; 贺承钦
Original assignee: ENGINEERING MACHINERY PLANT OF LIMING ENGINE-MAKING Co SHENYANG
Current assignee: ENGINEERING MACHINERY PLANT OF LIMING ENGINE-MAKING Co SHENYANG
Priority date: 1994-07-15
Filing date: 1994-07-15
Publication date: 1995-05-10
Anticipated expiration: 2004-07-15

Abstract

The utility model belongs to the improvement of a tube-casing type vapour-liquid heat exchanger. The utility model is characterized in that the outer wall of a heat-transfer pipe forms a surface with intensive rugged pockmarks through a special machining; a hot vapour medium inlet and the outside of a scour prevention ring plate are provided with an annular outer diversion cavity. The heat-transfer pipe of the utility model can continuously maintain a stable state of droplet condensation heat exchange and thus the heat exchange efficiency can be improved by 4-6 times. The utility model has the advantages of eliminating noise, reducing vibration wear and prolonging service life of the heat exchanger.

Description

Tube-casing type high-efficiency vapour-liquid heat exchanger

The utility model belongs to the further improvement of shell-and-tube heat exchanger.It relates to the raising of the various vapour one liquid type heat exchanger performance of multi-field uses such as oil, chemical industry, weaving, thermoelectric engineering.

Chinese patent 90213536.8 " a kind of high-performance heat exchanger " is transformed heat-transfer pipe, and the heat-transfer pipe of this heat exchanger is under the liquid situation at heat transferring medium, in no matter managing or outside the pipe, can both obtain more stable turbulent flow, it has improved the coefficient of heat transfer, reaches the purpose of high efficient heat exchanging.But work as heat transferring medium one side is liquid, and when opposite side was steam state, situation was then different, a liquid side is still the film condensation heat exchange, does not have greatly to change, and for steam state one side, owing to be not formed with the environment that is beneficial to the dropwise condensation heat exchange, the heat exchange effect is obviously not really desirable.

The purpose of this utility model promptly is to provide a kind of heat exchanger that has improved, and its heat-transfer pipe can constantly be kept stable dropwise condensation heat exchange state, thereby improve vapour one liquid type shell-and-tube heat exchanger heat exchange efficiency.

The utility model is achieved in that promptly and in the vapour one liquid type shell-and-tube heat exchanger of being made up of housing, the import and export of hot vapour medium, cold liquid medium import and export, heat-transfer pipe, erosion control ring flat-plate and deflection plate the special process of heat-transfer pipe outer wall is formed uneven intensive pockmark surface.For increasing heat exchange area effectively, diversion cavity outside hot vapour medium import department erosion control ring flat-plate arranged outside ring-type.For ease of mounting or dismounting, it is little that the heat-transfer pipe diameter is made a big other end.

Advantage of the present utility model is that uneven intensive pockmark surface helps the condensation of steam state medium, and the steam state medium generates a large amount of nuclei of condensation on this surface, thereby forms the dropwise condensation heat-transfer surface.The condensation here of hot vapour medium disengages heat and passes to the metal tube wall by drop, and then passes to cooling medium by wall.Because the dropwise condensation coefficient of heat transfer is big doubly more a lot of than the film condensation coefficient of heat transfer, thereby improved the thermal efficiency of heat exchanger greatly.The heat exchange effect of heat exchanger can improve 3～5 times, and the Coefficient K value can reach 3500～5000W/M ²C ⁰The utility model adopts the outer diversion cavity of ring-type, has eliminated noise, has reduced bundle vibration and wearing and tearing, can prolong the service life of heat exchanger.

See embodiment below in conjunction with accompanying drawing.

Fig. 1 is the structural representation of an embodiment of the utility model.

Fig. 2 is the partial enlarged drawing of heat-transfer pipe among Fig. 1.

In Fig. 1, (10) are heat exchanger shell, locate in hot vapour medium import (1) and (2), and the outside in erosion control ring flat-plate (7) is provided with the outer diversion cavity (8) of ring-type.(9) be deflection plate, (6) are heat-transfer pipe, and (5) are the outlet of hot vapour medium, and (3) and (4) are respectively the import and the outlet of cold liquid medium.In Fig. 2, the curved symmetric design of heat-transfer pipe, its circular arc and blend radius are respectively R1 and R2, and the heat-transfer pipe outer wall is intensive rough pockmark surface (11) through the special process.Heat-transfer pipe (6) passes deflection plate (9) and pipe diameter, and to be a big other end little.Certainly, the two cambered surfaces of the heat-transfer pipe outer wall ring-type that also can be designed to be recessed into and perpendicular to female tubular axis line etc. the pitch groove.

Claims

1, a kind of shell-and-tube vapour-liquid heat exchanger, comprise: housing (10), erosion control ring flat-plate (7), heat-transfer pipe (6), hot vapour medium import (1) (2), hot vapour media outlet (5), cold liquid medium import (3), the outlet of cold liquid medium (4), deflection plate (9) is characterized in that:

A, heat-transfer pipe (6) outer wall are intensive rough pockmark surface (11);

B, hot vapour medium import (1) (2) locate and the arranged outside ring-type of erosion control ring flat-plate (7) outside diversion cavity (8).

2, shell-and-tube vapour one liquid heat exchanger according to claim 1 is characterized in that big other end of heat-transfer pipe (6) diameter is little.