CN2303259Y

CN2303259Y - Shell and tube heat-exchanger

Info

Publication number: CN2303259Y
Application number: CN 97221816
Authority: CN
Inventors: 董国政
Original assignee: Individual
Current assignee: Individual
Priority date: 1997-07-16
Filing date: 1997-07-16
Publication date: 1999-01-06
Anticipated expiration: 2007-07-16

Abstract

The utility model relates to a shell and tube type heat exchanger which comprises a barrel-shaped shell body, cooling tube groups distributed in the shell body and partition boards among the cooling tube groups, wherein blind tubes with small holes or narrow slits are arranged in the cooling tubes and a gap is arranged between two tubes to form a spraying and heat exchanging tube. The utility model has the advantages of flowing area reduction, flow velocity enhancement and collision increase of fluid particles and the surface so as to strengthen the convection heat transfer between a fluid and the solid surface and is suitable for seagoing vessels and other device needing to be cooled.

Description

A kind of shell and tube exchanger

The utility model belongs to a kind of heat-exchanger rig, is a kind of heat exchanger peculiar to vessel specifically, mainly is that the prior art structure has been done improvement.

At present, the pipe heat exchanger that uses on the ocean-going vessel mainly adopts the cooling nest of tubes that is distributed with circular cross-section in the barrel-type casing.There is cover plate at two ends and forms the container of a sealing.Because the two ends of every pipe all adopt the expansion connection to be fixed on the end plate, nest of tubes inner wall space and outer wall space are isolated, and during use, seawater flows in nest of tubes through inlet, fresh water or profit oil flow through outside pipe, thereby the realization heat exchange is satisfied in the ordinary course of things, usually under the situation of the big amount of cooling water of needs, then need change the volume of shell, strengthen the flow process lengthening of cold fluid and hot fluid in container, change installing space, so influenced original scope of application.

The purpose of this utility model is for addressing the above problem, and provide a kind of have do not change original installation specification, realize the heat exchange of big amount of cooling water simultaneously, improved the heat-transfer effect and the scope of application.

For achieving the above object, technical solution of the present utility model is achieved in that a kind of shell and tube exchanger, adopting distributes in the columnar housing is equipped with the cooling nest of tubes of circular cross-section, two ends by every pipe are fixed on the end plate with the expansion connection, and will cool off polylith large bamboo hat with a conical crown and broad brim dividing plate also will be housed between the nest of tubes, and between the cooling water outlet and inlet diaphragm plate is set also, make its whole formation that container is installed; Also be provided with the blind pipe of aperture or narrow slit in the described cooling tube, make between its blind pipe and the cooling tube and form certain interval, constitute jet flow exchange pipe by the inner surface that aperture sprays to the heat exchange cooling tube in order to cooling medium.

Another feature of the present utility model also can be inserted in above-mentioned heat-exchange tube outside the one thick blind pipe that has aperture or a narrow slit, can save the dividing plate in the container.

The characteristics that the utlity model has are: owing to adopted cooling nest of tubes inside to be equipped with blind pipe with holes, make cooling medium spray to the inner surface of heat-exchange tube by aperture, thereby reduced circulation area, improved flow velocity.Under the percussion of current, make the laminar boundary layer case turbulent flowization between the fluid and the surface of solids, increase fluid particle and surperficial bump, thereby strengthened the convection heat transfer' heat-transfer by convection between the fluid and the surface of solids.

Embodiment is further described in conjunction with the accompanying drawings.

Fig. 1 is the shell and tube exchanger structural representation.

Fig. 2 is a jet flow heat-exchange tube structural representation.

Fig. 3 is another structural representation of jet flow heat-exchange tube.

Show the overall structure of shell and tube exchanger by Fig. 1,2.By the cooling nest of tubes 7 of the circular cross-section that is equipped with in the columnar housing 1, and form the container of a sealing.Be provided with the blind pipe 8 of being with aperture or narrow slit by every pipe 7 inside, make between blind pipe 8 and the cooling tube 7 and form certain interval, constitute a jet flow heat-exchange tube by the inner surface that aperture sprays to heat exchange cooling tube 7 in order to cooling medium.And will cool off polylith large bamboo hat with a conical crown and broad brim dividing plate 3 also will be housed between the nest of tubes, and between the cooling water import and export diaphragm plate 9 will be housed also, make the cold fluid and hot fluid flow process that in container, extends.Standing at the cooler top have vent valve 4, and discharge valve 6 then is equipped with in the bottom, and also be provided with on the end cap and look into fuel tap 5, in order to monitor the leakage situation of cooler.

The utility model is done corresponding the improvement to the jet flow heat-exchange tube, does not break away from matter of the present utility model, sees shown in Figure 2.Above-mentioned outside by the heat-exchange tube that is provided with blind pipe in the cooling tube is inserted in a thick jet flow blind pipe 10 that has aperture or a narrow slit again, can saves the large bamboo hat with a conical crown and broad brim dividing plate in the container simultaneously, can realize better cooling effect equally.

Claims

1, a kind of shell and tube exchanger, comprising distributes in the cylindrical shell is equipped with circular cooling nest of tubes, and by polylith large bamboo hat with a conical crown and broad brim dividing plate being housed and making it constitute the sealing cooler between the cooling nest of tubes, and fluid-solid is imported and exported, it is characterized in that, also be provided with the blind pipe (8) of aperture or narrow slit in the described cooling tube (7), and leave certain interval between two pipes, form the jet flow heat-exchange tube.

2,, it is characterized in that the outside of the jet flow heat-exchange tube of being made up of cooling tube (7) and blind pipe (8) is inserted in a thick jet flow blind pipe (10) that has aperture or a narrow slit again by the described heat exchanger of claim 1.