CN2132143Y

CN2132143Y - Plate-shell type heat exchanger

Info

Publication number: CN2132143Y
Application number: CN 92213395
Authority: CN
Inventors: 方心树
Original assignee: Individual
Current assignee: Individual
Priority date: 1992-03-14
Filing date: 1992-03-14
Publication date: 1993-05-05
Anticipated expiration: 2002-03-14

Abstract

The utility model discloses a plate shell type heat exchanger which is formed by a plate bundle which comprises a cylinder shape shell body and a plurality of basic elements, and is characterized in that the basic heat transfer elements are form by the middle spot welding and the plate edge welding of a flat surface plate sheet with bubbling points in the middle. The flat surface plate sheet is formed by two blocks of sheet metal. The interior of the plate cavity of the utility model is a flat surface reticular fluid channel. The both ends of the plate bundle and the both ends of the shell body adopt dismountable fixed connection structure. The abuses of the flat tubular basic elements and stuffing box structure are removed. Thus, the utility model has the advantages of temperature resistance, compression resistance, high efficiency heat transfer, reliable sealing performance, compact structure, large heat transfer area of unit volume, and wide application range.

Description

Plate-shell type heat exchanger

The utility model relates to a kind of lamella heat exchanger.

Lamella heat exchanger of the prior art is made of cylindrical shell and the plate bundle formed with some basic heat transfer elements, basic heat transfer element is to be welded by the laths of metal that two pitches equate, the runner of fluid is flat tubulose, the plate bundle is fixed with flange with adopting an end and housing being connected of housing, the other end connects with the fixing form of stuffing-box, to solve the airtight and temperature-compensating of shell side.Consult Mao Xilan chief editor " design of heat exchanger ", Shanghai science tech publishing house,, the 417th page-432 pages in 1988; " heat exchanger principle and the calculating " that Zhu engages hat to write, publishing house of Tsing-Hua University,, the 212nd page-215 pages in 1987.In the above-mentioned type lamella heat exchanger, flat tubulose runner that basic heat transfer element constitutes in fact just is equivalent to a kind of pipe that has flattened, basically do not change the fluidised form of fluid in pipe, still belong to tube wall formula heat transfer character, heat transfer coefficient improves limited, in addition owing to adopt not only complex structure of stuffing-box collocation structure, and easily produce dielectric leakage, according among the GB151-89 " steel tube shell type heat exchanger " 316 be not suitable for volatile about the stuffing box structure heat exchanger, inflammable, explosive, poisonous and valuable medium and generally only be used for the following restriction provision of 2.5MPa makes the scope of application of lamella heat exchanger in the prior art be subjected to the restriction of dielectric property and working pressure.

Task of the present utility model provides a kind of lamella heat exchanger, and it can further improve heat transfer coefficient and improve the sealing property of shell side.

Task of the present utility model is achieved through the following technical solutions: the basic structure form of described lamella heat exchanger is a kind ofly to be made of cylindrical shell and the plate bundle formed with some basic heat transfer elements, according to thermal conduction study augmentation of heat transfer theory, the turbulent extent of enhance fluid can improve heat transfer coefficient effectively, therefore the feature of the technical program is that the heat-transfer area of basic heat transfer element is a wooden partition formula heat-transfer area, basic heat transfer element is the centre of being made by two sheet metals with the flat plate of some bubble points through middle spot welding, the weldering of edges of boards seam forms, be netted fluid passage, plane in the plate chamber, can make fluid produce repeatedly baffling and keep turbulence state, strengthen the raising heat transfer coefficient with this, in order to improve the sealing property of shell side, the plate bundle adopts removable fixedlying connected with the housing two ends.

Owing to adopt such scheme, basic heat transfer element structure meets efficient heat transfer mechanism, so can further improve heat transfer coefficient, the syndeton of plate bundle and housing has overcome the disadvantage of stuffing box structure, therefore can guarantee the shell side favorable sealing property, and medium is difficult for leaking.

Below in conjunction with drawings and Examples the utility model is further specified.

Fig. 1 is the basic structure sketch.

Fig. 2 is the A-A profile of Fig. 1.

Fig. 3 is the B-B profile of Fig. 2.

Fig. 4 is the plate bundle and the housing johning knot composition of another embodiment.

Fig. 5 is basic heat transfer element structure chart.

Mark among the figure: 1--pipe connecting flange, 2--are taken over, and 3, the 9--bolt, 4, the 10--nut, 5--inverse flange or end cap, 6a(6b)--expansion joint, 7--housing, 8, the 17--tube sheet, the 11--vessel flange, 12--channel flange, 13--upper cone, 14--pipe nipple, 15,21--gasket seal, 16--plate bundle, 18--lower cone, 19--plate bundle tube connector, 20--full face flange, 22--changeover portion, the 23--flange, the basic heat transfer element of 24--, a ₁, a ₂--shell side is imported and exported mouth of pipe symbol, b ₁b ₂--tube side is imported and exported mouth of pipe symbol.

A kind of specific embodiment of the present invention describes with reference to the accompanying drawings:

A among Fig. 1 ₁, a ₂For shell side is imported and exported b ₁, b ₂For plate journey (tube side that is equivalent to shell-and-tube heat exchanger) is imported and exported.

The formation of plate journey part: the basic heat transfer element 24 that some chord lengths are not waited rearranges plate bundle 16, the cross section of plate bundle as shown in Figure 2, weld as shown in Figure 3 with

tube sheet

8,17 respectively at plate bundle two ends, tube sheet 8 with by pipe nipple 14, the bobbin carriage that upper cone 13 and channel flange 12 are formed connects, tube sheet 17 and lower cone 18, plate bundle tube connector 19 and full face flange 20 join successively.Plate journey fluid is by b ₁, b ₂Mouth of pipe turnover is in basic heat transfer chamber.

Basic heat transfer element 24 structures as shown in Figure 5, each basic heat transfer element is that the flat plate of middle the tape drum bubble point that is pressed into two sheet metals welds formation through middle spot welding and edges of boards seam.

The formation of shell side part: be made up of cylindrical shell 7 and vessel flange 11 and inverse flange end cap 5, shell-side fluid is by a ₁, a ₂Mouth of pipe turnover is skimmed over from the basic heat transfer element outside.

The plate bundle is connected with housing, two ends are adopted removable fixedly connected, one end is to be connected with bolt, nut 9,10 by vessel flange on channel flange and the housing, the other end is connected with bolt,

nut

3,4 by full face flange that is located at this plate bundle end and the inverse flange end cap that is located at shell end, two joint faces seal with

pad

21 and 15 respectively, and splitting out bolt, nut, plate bundle can extract out from housing.

When the temperature-compensating requirement is arranged, expansion joint 6b can be set, but best mode is to adopt the form of expansion joint 6a to be located in the plate bundle tube connector on housing.

Fig. 4 is another embodiment that the plate bundle is connected with housing: inverse flange end cap 5 can be made the form of flange end cap 23, be connected with housing 7 by changeover portion 22.

Claims

1, a kind of lamella heat exchanger, constitute by cylindrical shell and the plate bundle formed with some basic heat transfer elements, it is characterized in that basic heat transfer element is that the flat plate of the middle tape drum bubble point made by two sheet metals forms through middle spot welding, the weldering of edges of boards seam, be netted fluid passage, plane in its plate chamber, the plate bundle is connected employing with the housing two ends removable fixedly connected.

2, by the described lamella heat exchanger of claim 1, it is characterized in that a wherein end of plate bundle is connected with the end cap that is located at shell end by the full face flange that is located at this end.

3, by the described lamella heat exchanger of claim 2, it is characterized in that end cap is an inverse flange.

4, by the described lamella heat exchanger of claim 2, it is characterized in that end cap is a flange.

5,, it is characterized in that the plate bundle can extract out from housing by the described lamella heat exchanger of claim 1.

6, by the described lamella heat exchanger of claim 1, it is characterized in that being provided with expansion joint.

7, by the described lamella heat exchanger of claim 6, it is characterized in that expansion joint is connected on the housing.

8, by the described lamella heat exchanger of claim 6, it is characterized in that expansion joint is connected on the plate bundle tube connector.