CN102102957A

CN102102957A - Oblate staggered pipe for heat exchanger

Info

Publication number: CN102102957A
Application number: CN 200910248454
Authority: CN
Inventors: 张迎恺; 高丽萍; 高磊
Original assignee: FUSHUN CHEMICAL MACHINERY EQUIPMENTS MANUFACTURING Co Ltd; Sinopec Engineering Inc; Liaoning Shihua University
Current assignee: FUSHUN CHEMICAL MACHINERY EQUIPMENTS MANUFACTURING Co Ltd; Sinopec Engineering Inc; Liaoning Shihua University
Priority date: 2009-12-17
Filing date: 2009-12-17
Publication date: 2011-06-22

Abstract

The invention belongs to the technical field of chemical equipment manufacturing. In order to overcome the defect of low heat transfer rate in a traditional heat exchanger, the invention discloses an oblate staggered pipe for the heat exchanger, which is formed by sequentially connecting a flat pipe, a circular pipe, a flat pipe, a flat pipe, a circular pipe and a flat pipe, the length of each pipe is identical, the two flat pipes adjacent to the circular pipes are mutually perpendicular and shaped like a cone and gradually transition to the adjacent circular pipes, the two adjacent cone-shaped flat pipes transition to the maximum sections of each other in parallel, with identical corresponding sizes, and the maximum section perimeter of each flat pipe is identical to the perimeter of each circular pipe. The oblate staggered pipe is suitable for a fixed pipe plate type heat exchanger, a U-shaped pipe type heat exchanger or a floating head type heat exchanger, complex flow taking a wave mode as a main characteristic is generated in fluid in a pipe side and a shell side, pure counter flow is formed inside and outside a heat exchanger pipe, stronger agitation is achieved due to a larger impulsive force particularly at the changing position of the pipe shape so as to form staggered turbulence, thereby a heat transfer process is reinforced to a larger extent. Moreover, the surface of the pipe wall can be automatically cleaned under the action of a medium in the shell side and scales are difficult to form.

Description

A kind of oblate staggered pipe that is used for heat exchanger

One, technical field

The invention belongs to chemical industry equipment manufacturing technology field, be specifically related to a kind of oblate staggered pipe that is used for heat exchanger.

Two, background technology

The world today, owing to fast development economic and industry, countries in the world generally are faced with the shortage of energy problem, tap a new source of energy and how efficiently to utilize to have the common concern that the energy has been subjected to countries in the world now.Because the extensive use of heat exchanger in industrial production, the new technology that improves heat exchanger efficiency, augmentation of heat transfer, research augmentation of heat transfer becomes the focus of people's growing interest.At present, the heat exchanger tube that has used divides from cross sectional shape pipe and flat tube, seen light pipe and screwed pipe etc. from extending, the heat exchanger tube that these structures are different all has its advantage separately in form, but is awaiting further to improve on the heat exchange efficiency and in the utilization of material.

Three, summary of the invention

In order to overcome the heating rate of passing at the low of traditional heat exchangers, the present invention is a kind of oblate staggered pipe that is used for heat exchanger, and under the situation that does not change traditional heat exchanger tube centre-to-centre spacing, this oblate staggered pipe has the heat exchange efficiency higher than pipe.

The technical solution adopted for the present invention to solve the technical problems is: the heat exchanger tube of heat exchanger adopts oblate staggered pipe, it is formed by flat tube, pipe, flat tube, flat tube, pipe, flat tube successively, each segment length is identical, and two flat tubes adjacent with pipe are vertical mutually, the tapered pipe that transits to gradually, the tapered parallel place, maximum cross-section each other that transits to of adjacent two flat tubes, dimensionally stable changes, each flat tube correspondingly-sized equates that maximum flat tube perimeter of section is identical with pipe.When in heat exchanger, using, oblate staggered pipe two ends are fixed on the tube sheet, with the tube sheet junction be pipe, adopt the corner square arrangement, heat exchanger tube contacts along maximum flat tube long axis direction point, plays mutual supporting role, heat exchanger tube is pricked tired the binding together of hoop by several groups and is fixed, oblate staggered heat exchange of heat pipe does not have deflection plate, does not have flow dead, has reduced cost simultaneously yet.Because cast constantly changes, smooth transition between each section pipe does not have fold, and resistance is little, it is that the complexity of principal character flows that tube side fluid and shell-side fluid all produce wave, especially in cast variation place, impulse force is bigger, forms staggered turbulent flow, obtain stronger stirring, thereby strengthened diabatic process largely, and tube wall clean surface voluntarily under the effect of shell side medium, less scaling.By some contact, and shell-side fluid mainly does vertically to flow, and forms pure adverse current with liquid in pipe, not only improved the efficient of heat exchanger tube but also can well overcome induced vibration, improved the feasibility and the reliability of its operation between the heat exchanger tube.

With the heat exchanger tube of traditional shell-and-tube heat exchanger relatively, the advantage of type of the present invention is:

1. oblate staggered pipe that is used for heat exchanger, heat exchanger tube is inside and outside to form pure adverse current, and shell-side fluid mainly does vertically to flow, and can well overcome induced vibration, therefore can improve heat exchange efficiency greatly.

2. all to produce with the wave be that the complexity of principal character flows for heat exchanger tube side and shell-side fluid, and especially in cast variation place, impulse force is bigger, obtains stronger disturbance, the formation turbulent flow, thus strengthened diabatic process largely.

3. because there is not deflection plate, the flow resistance of shell side is very little, and there is not flow dead in shell side, and tube wall clean surface voluntarily under the effect of shell side medium is less scaling simultaneously.Owing to do not have deflection plate, reduced cost and man-hour again.

Four, description of drawings

Fig. 1 is a structural representation of the present invention;

Fig. 2 is the A-A sectional view of Fig. 1;

Fig. 3 is the B-B sectional view of Fig. 1;

Fig. 4 is the C-C sectional view of Fig. 1;

Fig. 5 is the structural representation of the heat exchanger of the oblate staggered pipe of employing;

Fig. 6 is the left view of Fig. 5;

Fig. 7 is the D-D partial section of Fig. 5;

Fig. 8 is the E-E partial section of Fig. 5;

Fig. 9 is the F-F partial section of Fig. 5.

1. tube sheets among the figure, 2. oblate staggered pipe is 3. pricked hoop, 4. tube sheet.

Five, the specific embodiment

A kind of oblate staggered pipe that is used for heat exchanger, change the pipe in the shell-and-tube heat exchanger into oblate staggered pipe as heat exchange element, there is not deflection plate in the tube bank, the contact of heat exchanger tube holding point, play mutual supporting role, and it is mobile to form wave between heat exchanger tube, forms staggered turbulent flow, obtain stronger stirring, thereby strengthened diabatic process largely.

In Fig. 1, oblate staggered pipe (2) is formed successively by flat tube, pipe, flat tube, flat tube, pipe, flat tube, each segment length is identical, and two flat tubes adjacent with pipe are vertical mutually, the tapered pipe that transits to gradually of two flat tubes, the tapered parallel place, maximum cross-section each other that transits to of adjacent two flat tubes.When using in heat exchanger, the end of heat exchanger tube is fixed on tube sheet (1), (4), and for the ease of being connected of heat exchanger tube and tube sheet (1), (4), the two ends of oblate staggered pipe (2) are circular.When oblate staggered heat exchange of heat pipe tube bank is assembled, the oblate staggered pipe of every installation one row, turne tube guarantees that the adjacent pipe on each plane contacts at flat tube major axis maximum point.For the rigidity needs of restraining, in tube bank, be furnished with several roads and prick hoop (3), guarantee that interbank maintenance closely contacts and the lifting of convenient tube bank.This oblate staggered pipe can be used for fixed tube-sheet exchanger, U-shaped pipe heat exchanger, movable tube sheets heat exchanger.

Claims

1. oblate staggered pipe that is used for heat exchanger, it is characterized in that: it is to be formed successively by flat tube, pipe, flat tube, flat tube, pipe, flat tube, and each segment length is identical.

2. a kind of oblate staggered pipe that is used for heat exchanger according to claim 1, it is characterized in that: two flat tubes adjacent with pipe are vertical mutually, the tapered pipe that transits to gradually, the tapered parallel place, maximum cross-section each other that transits to of adjacent two flat tubes, correspondingly-sized equates.

3. a kind of oblate staggered pipe that is used for heat exchanger according to claim 1, it is characterized in that: maximum flat tube perimeter of section is identical with the pipe girth.