CN201242378Y

CN201242378Y - Novel shell type heat exchanger

Info

Publication number: CN201242378Y
Application number: CNU2008200777528U
Authority: CN
Inventors: 谢淑丽
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-07-03
Filing date: 2008-07-03
Publication date: 2009-05-20
Anticipated expiration: 2018-07-03

Abstract

The utility model discloses a novel shell-and-tube heat exchanger, which comprises a casing, wherein a front sealed head is connected on the front end of the casing, and a rear sealed head is connected on the rear end thereof, a shell pass fluid inlet is arranged on the front side wall of the casing, and a shell pass fluid outlet is arranged on the rear side wall of the casing, a front tube plate is arranged on the inner front end of the casing, a rear tube plate is arranged on the inner rear end of the casing, and a heat exchange tube bundle is fixed between the front tube plate and the rear tube plate. The utility model is characterized in that an approximate helical supporting screen plate is arranged between heat exchange tube bundles, and is formed by inter-tube supporting short sections which are connected by a horizontal connecting bar, and the inter-tube supporting short sections are connected by small short sections which are processed from ellipse sheets. The utility model greatly strengthens the heat transfer effect of the shell pass, and increases the heat exchanger efficiency of the shell-and-tube heat exchanger.

Description

The novel pipe shell type heat exchanger

Technical field

The utility model relates to a kind of heat exchanger, especially a kind of novel pipe shell type heat exchanger.

Background technology

Shell-and-tube heat exchanger is that pipe is connected with tube sheet, and then fixes with housing, and its version has a lot, and it is board-like etc. to mainly contain fixed tube sheet type, floating head type, U type tubular type, sliding tube.People are in order to improve the heat exchange efficiency of heat exchanger, the shell-and-tube heat exchanger intraductal heat transfer is strengthened carried out a large amount of research, and obtained great successes, and by contrast, it is extensive that the research of the heat conduction reinforced aspect of shell side be can not show a candle to tube side.The approach of shell side augmentation of heat transfer mainly contains two kinds at present: (1) changes the pipe profile or adds fin at pipe, i.e. change by tubular shape or surface nature comes augmentation of heat transfer, to improve efficiency of heat exchanger, as screwed pipe, porous surface tube, external finned tube etc.; (2) shape of change shell side baffle plate or tube supports thing to reduce or eliminate the delay dead band that shell side flows, is fully used heat transfer area.The development of shell-and-tube heat exchanger shell side baffle plate or tube supports thing shows as the change of deflection plate form.Wherein, spiral baffle heat exchanger makes and flows than the more approaching vertical plug flow of vertical cambered plate owing to introduce spiral flow mechanism, effectively reduces flow dead, has reduced the vibrations of pipe, has reduced flow pressure drop, has improved heat exchange efficiency.But, make that spiral baffle heat exchanger still needs further to improve owing to the short circuit phenomenon of the near axis that in spiral baffle heat exchanger, exists and in problems such as " district slowly " phenomenon near the shell inner surface place.

The utility model content.

The technical problems to be solved in the utility model provides a kind of heat exchange efficiency height, and energy consumption is low, the novel pipe shell type heat exchanger of long service life.

For solving the problems of the technologies described above, technical solution adopted in the utility model is:

The novel pipe shell type heat exchanger, comprise housing, the housing front end is connected with front head, the rear end is connected with rear head, the sidewall of housing front portion is provided with the shell-side fluid import, the sidewall at housing rear portion is provided with the shell-side fluid outlet, the enclosure interior front end is provided with front tube sheet, the enclosure interior rear end is provided with back tube sheet, before, be fixed with heat-exchanging tube bundle between the back tube sheet, be provided with approximate spiral between heat-exchanging tube bundle and support web plate, should form by supporting pipe nipple between the pipe that links together with transverse link by approximate spiral support web plate, support pipe nipple between described pipe and be formed by fixedly connecting by the little pipe nipple that elliptical piece is processed into.

Approximate spiral supports web plate and axially is distributed between the heat-exchanging tube bundle along heat exchanger.

Adopt the beneficial effect that technique scheme produced to be: approximate spiral supports web plate can the heat exchanging tube bank play good supporting role, thereby has reduced the vibrations of heat exchanger tube, has prolonged the service life of equipment; Increase the shell side circulation area, thereby reduced the flow resistance of shell-side fluid, reduced the energy consumption of equipment; After shell-side fluid supported web plate by approximate spiral, fluid formed the vertical spin current of multiply and the complicated flow regime of streaming between the heat exchange tube gap, had improved the less turbulence of shell-side fluid, had increased the shell side film coefficient of heat transfer.Supporting at a plurality of approximate spiral of evenly arranging vertically under the effect of web plate should the sustainable whole shell side runner of complexity flow regime, thereby has strengthened the heat-transfer effect of shell side greatly, has improved novel pipe shell type heat exchanger heat exchange efficiency.

Description of drawings

Below in conjunction with the drawings and specific embodiments the utility model is described in further detail.

Fig. 1 is a structural representation of the present utility model;

Fig. 2 forms the structural representation that supports pipe nipple between the pipe that is similar to spiral support web plate in the utility model;

Fig. 3 makes the elliptical piece schematic diagram that supports pipe nipple in the utility model between pipe;

Fig. 4 makes the elliptical piece that supports pipe nipple in the utility model between pipe to section and postrotational schematic diagram;

Fig. 5 makes the elliptical piece that supports pipe nipple in the utility model between pipe to section and postrotational vertical view;

Fig. 6 is the structural representation when heat-exchanging tube bundle is square stringing in the utility model;

Fig. 7 is the structural representation when heat-exchanging tube bundle is the equilateral triangle stringing in the utility model.

Wherein, the 1st, front head, the 2nd, front tube sheet, the 3rd, the shell-side fluid import, the 4th, housing, the 5th, shell-side fluid is imported and exported, and the 6th, back tube sheet, the 7th, rear head, the 8th, support pipe nipple between pipe, the 9th, heat-exchanging tube bundle, the 10th, transverse link.

The specific embodiment

Below in conjunction with accompanying drawing embodiment of the present utility model is described.

As shown in Figure 1, the heat-exchanging tube bundle 9 of this heat exchanger is fixedlyed connected with front tube sheet 2, back tube sheet 6, front tube sheet 2, back tube sheet 6 place two ends in the housing 4, approximate spiral supports web plate and axially is distributed between the heat-exchanging tube bundle 9 along heat exchanger, play and support heat-exchanging tube bundle 9 and reduce its vibrations, prevent the effect that damages, front head 1 is connected in housing 4 front ends, rear head 7 is connected in housing 4 rear ends, shell-side fluid import 3 is connected on the sidewall of housing 4 front portions, and shell-side fluid outlet 5 is connected on the sidewall at housing 4 rear portions.The preparation method that approximate spiral supports web plate is: an elliptical piece is cut into two parts along major axis, as shown in Figure 3; Then two parts around the minor axis opposite spin, form little pipe nipple, adjust angle α between two half elliptical piece, as shown in Figure 5, make section and postrotational elliptical piece vertical view for circular, as shown in Figure 5; Several are supported pipe nipple 8 by fixedly connected just formation of little pipe nipple that elliptical piece is processed between pipe, as shown in Figure 2.By transverse link 10 and with its pipe that links together between support pipe nipple 8 and constitute approximate spiral jointly and support web plate, approximate spiral support web plate axially is distributed between the heat-exchanging tube bundle 9 along heat exchanger.Approximate spiral support support between the pipe of web plate pipe nipple 8 along heat exchanger distribution mode radially respectively as Fig. 6, shown in Figure 7.Fig. 6 is the schematic diagram of heat-exchanging tube bundle 9 by square stringing, and Fig. 7 is the schematic diagram of heat-exchanging tube bundle 9 by the equilateral triangle stringing.The elliptical piece minor axis dimension, relevant with the caliber and the tube pitch of the cloth form of tubes of heat-exchanging tube bundle 9, heat-exchanging tube bundle 9, when heat-exchanging tube bundle 9 was pressed the equilateral triangle stringing, B=L/cos30-D, B were ellipse short shaft, and L is the tube pitch of heat-exchanging tube bundle 9, and D is the caliber of heat-exchanging tube bundle 9; Heat-exchanging tube bundle 9 is during by square stringing, B=L/cos45-D.Close between the major and minor axis of elliptical piece and be: A=B/cos (α/2), A is a transverse, and B is an ellipse short shaft, and α is an angle between as shown in Figure 3 two halves elliptical piece.

Claims

1, a kind of novel pipe shell type heat exchanger, comprise housing, the housing front end is connected with front head, the rear end is connected with rear head, the sidewall of housing front portion is provided with the shell-side fluid import, the sidewall at housing rear portion is provided with the shell-side fluid outlet, the enclosure interior front end is provided with front tube sheet, the enclosure interior rear end is provided with back tube sheet, before, be fixed with heat-exchanging tube bundle between the back tube sheet, it is characterized in that: be provided with approximate spiral between heat-exchanging tube bundle and support web plate, should form by supporting pipe nipple between the pipe that links together with transverse link by approximate spiral support web plate, support pipe nipple between described pipe and be formed by fixedly connecting by the little pipe nipple that elliptical piece is processed into.

2, novel pipe shell type heat exchanger according to claim 1 is characterized in that: approximate spiral supports web plate and axially is distributed between the heat-exchanging tube bundle along heat exchanger.