WO2014111015A1

WO2014111015A1 - Novel shell and tube heat exchanger

Info

Publication number: WO2014111015A1
Application number: PCT/CN2014/070658
Authority: WO
Inventors: 方真健; 覃正乐; 蒋志武
Original assignee: 英特换热设备(浙江)有限公司
Priority date: 2013-01-16
Filing date: 2014-01-15
Publication date: 2014-07-24
Also published as: CN103063060A; CN103063060B

Abstract

Disclosed is a novel shell and tube heat exchanger. A distributor (6) is arranged inside the novel shell and tube heat exchanger. A tube-side medium inlet (1) is communicated with a plurality of U-shaped heat exchange tube (9) inlets through the distributor (6). The distributor (6) distributes the tube-side medium entering from the tube-side medium inlet (1) evenly into each U-shaped heat exchange tube (9). The U-shaped heat exchange tubes (9) are two or more U-shaped heat exchange tubes (9) connected in series. The two or more U-shaped heat exchange tubes (9) are connected in series through U-shaped elbows (8). By changing the number of the U-shaped heat exchange tubes (9) in series connection, the length of the tube-side of the heat exchange tubes is increased exponentially. The tube-side medium flowing from the U-shaped heat exchange tube (9) flows into another U-shaped heat exchange tube (9) again. The tube-side medium circulates back and forth multiple times in two or more U-shaped heat exchange tubes (9), so the defect of inadequate tube-side is overcome, and advantages of good reliability and easy installation are obtained. Moreover, U-shaped heat exchange tubes (9) can be variable-diameter pipes. By arranging the detail constructions of the distributor (6) and a collector (7) in the novel shell and tube heat exchanger, the heat exchange efficiency is increased.

Description

New shell and tube heat exchanger

The invention relates to the technical field of heat exchangers, and more particularly to a novel shell and tube heat exchanger.

Background technique

Patent Application Publication No. CN102748965 A, Application Publication Date 2012. 10.24 The Chinese invention discloses a shell and tube heat exchanger, in which the inlet and outlet of the tube medium are disposed on two tube boxes, and are fixed at Both ends of the casing are manufactured at the time of processing, because the pipe medium (refrigerant) has a high working pressure, and the sealing between the pipe box and the casing is high, which causes processing, manufacturing, and installation difficulties. Moreover, the process medium is easy to cause leakage of the tube medium, and the sealing effect is poor; moreover, one heat exchanger has two joint sealing surfaces, which greatly increases the manufacturing cost. Secondly, the tube medium enters the heat exchange tube, and each heat exchange tube The distribution of the tube-pass medium is uneven, resulting in poor heat exchange efficiency.

Summary of the invention

The object of the present invention is to provide a novel shell-and-tube heat exchanger with high reliability and high heat exchange efficiency according to the deficiencies of the prior art; and the structure is simple, easy to manufacture, and easy to install.

In order to solve the above technical problem, the technical solution of the present invention is as follows: a novel shell-and-tube heat exchanger, wherein the novel shell-and-tube heat exchanger is provided with an inlet for a tube-passing medium inlet and a plurality of U-shaped heat exchange tubes, and The tube-forming medium entering from the inlet of the tube-tube medium is evenly distributed to the distributors in the U-shaped heat exchange tubes; the U-shaped heat exchange tubes are two or more U-shaped heat exchange tubes connected in series; 2 Or a plurality of U-shaped heat exchange tubes are connected in series by a U-shaped elbow. By changing the number of U-shaped heat exchange tubes connected in series, the tube length of the heat exchange tubes is multiplied to cause flow from the U-shaped heat exchange tubes. The tube-passing medium enters another U-shaped heat exchange tube again, and the tube-passing medium is repeatedly circulated and returned in two or more U-shaped heat exchange tubes, which can not only make up for the shortcomings of the tube tube shortage, but also shorten the heat exchange. The length of the device reduces the volume of the space; the number of pipe loops is reduced, which is more conducive to the medium distribution, so that the heat exchange efficiency of the heat exchanger is fully exerted. The reduction in the number of tubes makes the dispenser structure more compact.

Preferably, it also includes a collector disposed within the novel shell and tube heat exchanger for communicating the tube through medium outlet and the plurality of U-shaped heat exchanger outlets.

Preferably, the baffle is a spiral or arcuate baffle.

Preferably, the U-shaped heat exchange tube is a reduced diameter tube or a equal diameter tube.

Preferably, the inlet end of the distributor adopts a threaded pipe, and the gas-liquid two-phase of the medium generates turbulent flow in the threaded pipe to be well mixed and uniform, thereby improving the distribution effect.

The novel shell-and-tube heat exchanger comprises a casing having a medium inlet and a medium outlet, a plurality of U-shaped heat exchange tubes and a baffle plate, and a cover plate for closing the casing is fixed at the end of the casing. The cover plate is provided with a medium inlet and a medium outlet. An inlet of the medium in the shell-and-tube heat exchanger is connected through a distributor and an inlet of a plurality of u-type heat exchange tubes, and an outlet of the medium is communicated through the collector and an outlet of the plurality of u-type heat exchange tubes; The utility model comprises a distributor body having a through-flow hole, wherein the distributor body is provided with a pipe-length medium throttle portion for throttling and speed-up of the pipe-path medium entering from the inlet of the medium, and the pipe-length medium for speeding up after the throttle is accelerated. Dissolving the mixed dispersing mixing portion and the tube-length medium distributing portion that distributes the dispersed tube-length medium; the tube-cut medium restricting portion includes an orifice plug disposed in the through-hole, The orifice plug has a through hole for throttling; the dispersing mixing portion includes a mixing cavity formed by the throttle plug and the bottom surface of the through hole and is disposed on a bottom surface of the through hole a tapered body having a tapered diameter near the orifice plug; the tubular medium distribution portion includes a plurality of dispensing holes communicating with the mixing chamber, the distribution orifice axis and the orifice plug axis Straight line distance is linear with the throttle plug away Increase non-linearly.

The novel shell-and-tube heat exchanger comprises a casing having a medium inlet and a medium outlet, a plurality of u-shaped heat exchange tubes disposed in the casing, a baffle disposed in the casing, and a fixed baffle a cover plate at the end of the casing, the cover plate is provided with a medium inlet and a medium outlet, and the medium inlet is connected to the inlet of the plurality of u-type heat exchange tubes through a distributor, the medium is an outlet The collector and the outlet of the plurality of u-shaped heat exchange tubes are in communication; the straight tube outer diameter of the U-shaped heat exchange tube connecting portion is the smallest.

Preferably, the collector comprises a body, a plurality of collecting holes uniformly disposed on the body and communicating with the plurality of u-shaped heat exchange tubes, a collecting chamber communicating with the plurality of collecting holes, a mixing chamber, and a plurality of external interfaces that are connected to the mixing chamber, a central axis is disposed in the collection cavity, and a plurality of circular arc grooves are uniformly disposed on the outer circumferential surface of the central axis, and the circular arc groove is provided therein An arc sliding piece that performs 1-2° radial rotation in a circular arc groove, the dividing circular blade is fixed with a separating blade, and the plurality of dividing blades divide the collecting cavity into a plurality of and the collecting a partitioning chamber through which the holes communicate, and the dividing chamber communicates with the mixing chamber through the orifice.

The existing collector structures are almost the same, one outlet, a plurality of inlets connected to the heat exchange tubes, and a mixing chamber in the middle, the purpose of which is to collect and discharge the heat exchanged medium. However, after repeated research and experiments, we found that the heat exchange efficiency is not high enough, which is due to the collector factor. Because the U-shaped heat transfer tubes are multiple, when the heat exchange is performed, because of the position and thickness. For many reasons, the medium in the u-type heat exchange tube is not uniform when it is subjected to heat exchange. Some heat exchange is sufficient, the medium inside the tube is fully vaporized, the pressure inside the tube is relatively high, the flow rate is increased, and some heat exchange is performed. Insufficient, the amount of vaporization in the tube is small, the pressure inside the tube is relatively low, the flow rate is relatively slow, and the heat exchange in the u-type heat exchange tube is uneven. First, a relatively large impact is generated, resulting in a heat exchange tube. Accelerated damage, secondly, reduces the efficiency of heat exchange, so that some of the medium does not have time to exchange heat exchange. To this end, we have improved the structure of the collector, the medium coming out of the heat exchange tube first enters the collection hole, and then Entering the dividing chamber from the collecting hole, and finally entering the mixing chamber through the orifice, discharging from the external interface, when a u-shaped Heat exchange medium within the heat pipes When the change is sufficient, it enters the split cavity (we call a), and the pressure in the corresponding split cavity a is relatively large, if it is adjacent to the split cavity (we become b) because of the medium heat exchange in the U-shaped heat transfer tube If the pressure is relatively insufficient and the pressure is relatively low, the pressure of the dividing chamber b is relatively small, so that the two dividing chambers a and b generate a pressure difference, which will push the dividing blade to rotate in the direction of b, so that a The volume is larger than the volume of b, and after the volume of b is compressed, the pressure will rise, which will make the flow of the medium in the U-shaped heat exchange tube communicating with the b-segment chamber slower, the heat exchange is sufficient, and the pressure in b It will rise. At the same time, because the volume of a becomes larger, the flow rate is increased, and the corresponding pressure is reduced. Under the action of the two, the split blades will be reversed, and the adjustment is repeated, so that the medium in each U-shaped heat exchange tube is It can carry out sufficient heat exchange, and at the same time, it reduces the impact caused by the excessive pressure difference, and guarantees the service life of U-shaped heat exchange tubes and other parts.

Preferably, a second distributor is disposed between the distributor and the inlet of the U-shaped heat exchange tube, and the second distributor comprises a cylinder, which is disposed on the cylinder and communicates with the distributor a plurality of medium inlet holes and a plurality of medium outlet holes and intermediate holes communicating with the inlets of the plurality of U-shaped heat exchange tubes, wherein the intermediate holes are provided with a fixed shaft, and the outer circumference of the fixed shaft is uniformly distributed a plurality of arc chutes, wherein the arc chute is provided with a sliding piece that can perform 2-3° radial rotation in the arc chute, and the arc sliding piece is fixed with blades, and the plurality of The vanes divide the intermediate bore into a plurality of variable pockets that communicate the media inlet aperture with the media outlet orifice.

Although there is a distributor, in order to make the medium entering each U-shaped heat exchange tube as uniform as possible, we have added a second distributor, through the setting of the variable cavity, so that the medium in the two U-shaped heat exchange tubes When the distribution is not uniform enough, the volume of the variable volume of the medium becomes large, the pressure is instantaneously decreased, the volume of the variable chamber adjacent thereto becomes smaller, the pressure is instantaneously increased, and then the volume of the variable volume becomes smaller. As the volume becomes larger, the volume of the variable volume becomes larger and smaller, so that the volume between the variable chambers maintains a dynamic balance, and the difference is within the range we allow, thereby ensuring each U-shape. The medium in the heat exchange tube is uniform to improve heat exchange efficiency.

The beneficial effects of the invention are:

The novel shell-and-tube heat exchanger of the invention has good reliability and high heat exchange efficiency; and has the advantages of simple structure, easy manufacture and convenient installation.

DRAWINGS

The present invention will be further described below in conjunction with the accompanying drawings:

Figure 1 is a schematic view of a novel shell and tube heat exchanger of the present invention;

2 is a structural diagram of an embodiment of the present invention;

Figure 3 is a schematic structural view of the dispenser of the present invention;

Figure 4 is a perspective view of the baffle of the present invention; Figure 5 is a schematic structural view of the collector of the present invention;

Figure 6 is a cross-sectional view taken along line K-K of Figure 5;

Figure 7 is a partial enlarged view of A in Figure 6;

Figure 8 is a schematic structural view of a second dispenser of the present invention;

Figure 9 is a cross-sectional view taken along line L-L of Figure 8;

Figure 10 is a partial enlarged view of B in Figure 8.

In the picture:

1. Medium 1 import;

2. Medium 1 outlet;

3. Medium 2 imports;

4. Medium 2 outlet;

5, threaded pipe;

6, distributor 601 - distributor body, 601a - through hole, 601b_ throttle plug, 601c_ mixing chamber, 601d_ cone, 601e-distribution hole;

7, the collector;

8, U-shaped elbow;

9, U-shaped heat exchange tube;

10, the housing;

11, baffles;

12. Cover plate;

13. Drainage port;

14. Exhaust port;

15. Mounting bracket;

16. Medium 2 inlet temperature sensing tube placement port;

17, medium 2 outlet temperature tube placement.

detailed description

The following description is only a preferred embodiment of the invention and is not intended to limit the scope of the invention.

Embodiments, see Figures 1, 2, 3, 4, a novel shell and tube heat exchanger comprising a housing 10 having a medium 1 inlet 1, a medium 1 outlet 2, a mounting medium 2 inlet/outlet 3, 4, a U shape The heat exchange tube 9, the baffle 11, the U-shaped heat exchange tube 9 are equal diameter tubes or reducers, and two or more U-shaped heat exchange tubes 9 are connected in series. At the same time, a drain port 13 and exhaust gas are further provided on the casing 10. Port 14 and mounting bracket 15, medium 2 inlet 3 position is located at the front end of the outlet 2 of the medium 2, and is close to the cover 12 of the heat exchanger, medium 2 inlet 3 is provided with medium 2 inlet temperature tube placement port 16 The outlet of the medium 2 is provided with a medium 2 outlet temperature sensing tube placing port 17, the end of the housing 10 is connected by a bolt and a cover plate 12, and is sealed by a gasket, and the cover plate 12 is provided with a tube-passing medium 1 Inlet/outlet 1 and 2, in the novel shell-and-tube heat exchanger, the inlet of the tube-cut medium inlet 1 and the plurality of U-shaped heat exchange tubes 901 are provided, and the medium will be The inlet medium entering the inlet 1 is evenly distributed to the distributor 6 in each U-shaped heat exchange tube 902, and the outlet tube 2 and the plurality of the tube medium 1 are provided in the novel shell and tube heat exchanger The collector 7 of the U-shaped heat exchange tube 906 is connected to the outlet. The distributor 6 ensures that the tube-pass medium 1 entering from the tube-process medium inlet 1 can be uniformly distributed into the heat-exchange tube 9, and the collector 7 collects the tube-pass medium 1 in the U-shaped heat exchange tube 9 through the tube-pass medium. The outlet 2 is transported out. In the present embodiment, the distributor 6 includes a dispenser body 601 having a through hole 601a, and the distributor body 601 is provided with a tubular medium for throttling and speeding up the tubular medium entering from the inlet of the medium 1. a throttling portion, a dispersing mixing portion for dispersing and mixing the tube-length medium after the throttle-speeding, and a tube-length medium distributing portion for distributing the dispersing and mixing the tube-passing medium; further, the tube-passing medium section The flow portion includes an orifice plug 601b disposed in the through hole, and the throttle plug 601b is welded or riveted in the through hole 601a, or may be integrally formed, and has a through hole for throttling; The dispersing mixing portion includes a mixing chamber 601c formed by the orifice plug 601b and the bottom surface of the through hole, and a cone disposed on the bottom surface of the through hole with a diameter gradually decreasing toward the orifice plug 601d _; the tube-passing medium that has been throttled and accelerated by the orifice plug 601b enters the mixing chamber 601c, is dispersed by the cone 601d, and is mixed, the cone 601d is a cone, and the tube-shaped medium distribution portion includes a plurality of a distribution hole 601e through which the mixing chamber 601c communicates A linear distance between the axis of the distribution hole 601e and the axis of the orifice plug 601b increases linearly or nonlinearly away from the orifice plug 601b; the orifice plug 601b is used for the orifice of the throttle The cross sectional area is smaller than the sum of the cross sectional areas of all the distribution holes 601e.

The distributor 6 is located below the collector 7, and the inlet end of the distributor 6 and the outlet end of the collector 7 are fixedly connected to the cover plate 12.

The distributor 6 and the U-shaped heat exchange tube 901 are welded and fixed without a tube box and expansion joint. In the present embodiment, the baffle 8 is made by injection molding or other molding, and is subjected to a molding process by an injection molding process, and has high processing precision and good sealing effect.

The novel shell and tube heat exchanger comprises a casing 10 having a medium 2 inlet 3 and a medium 2 outlet 4, a plurality of U-shaped heat exchange tubes 9, and a baffle 11, the end of the casing 10 being fixed The end plate 12 of the casing 10 is closed. The cover plate 12 is provided with a medium 1 inlet 1 and a medium 1 outlet 2, in which the medium 1 inlet 1 passes through the distributor 6 and a plurality of U-shaped tubes. The heat exchange tube 9 is connected to the inlet.

In the shell-and-tube heat exchanger, the outlet 2 of the medium 1 is communicated through the collector 7 and the outlets of the plurality of U-shaped heat exchange tubes 9. The novel shell-and-tube heat exchanger of the invention has the medium 1 inlet 1 and the medium 1 outlet all disposed on a cover plate, and is connected to the inlet and the outlet of the u-type heat exchange tube through the distributor and the collector respectively, and adopts one end portion. Sealing with a gasket reduces the difficulty of sealing, machining and assembly. The dispenser is used to evenly distribute the tube-passing medium, especially when the vapor-liquid two-phase complex tube-pass medium is more advantageous. When many tube-passing media such as Freon enters from the inlet of the tube-passing medium, it is a liquid containing gas. In the past, when the tube box was used for distribution, the tube-passing medium entering each heat-exchange tube was uneven, and it also caused some u. The medium heat transfer tube has a large amount of gas in the tube process medium, and some U-shaped heat transfer tubes have a small amount of gas in the tube process medium, and the flow rate is unreasonable, and the present invention distributes the tube medium through the distributor to enter the u-type heat exchange tube. The tube medium is uniform, the flow rate is reasonable, and the heat exchange efficiency is significantly improved.

The distributor 6 includes a distributor body 601 having a through-flow hole 601a, and the distributor body 601 is provided with a pipe-length medium throttle portion for throttling and speed-up of the pipe-path medium entering from the pipe-process medium inlet 1 A dispersing mixing unit that disperses and mixes the tube-length medium after the throttle speed is increased, and a tube-length medium distribution unit that distributes the dispersed tube-length medium.

The tube-length medium throttling portion includes an orifice plug 601b disposed in the through-hole; the dispersing mixing portion includes a mixing chamber 601c formed by the orifice plug 601b and a bottom surface of the through-hole And a cone 601d disposed on the bottom surface of the through hole with a diameter gradually decreasing toward the orifice plug _; the tube-length medium distribution portion includes a plurality of distribution holes 601e communicating with the mixing chamber 601c, The linear distance between the axis of the distribution hole 601e and the axis of the orifice plug 601b increases linearly or non-linearly away from the orifice plug 601b.

The U-shaped heat exchange tube 9 is repeatedly twisted back into the casing 10 to form a "U" shaped heat exchange tube including a straight portion and a U-shaped portion.

The collector 7 and the 906 "U" type heat exchange tube are connected, the 906 "U" type heat exchange tube and the 904 "U" type heat exchange tube are connected by the 905 "U" type elbow, and the 904 "U" type heat exchange The tube and the 902 "U" type heat exchange tube are connected by a 903 "U" type elbow, and the 902 "U" type heat exchange tube and the distributor 6 are connected by a 901 straight tube; the 902, 904 and 906 "U" type exchanges The heat pipes are connected in series by 903 and 905 "U" type elbows to form three baffled circuits. Change the number of baffles and tube length by increasing or decreasing the number of "U" type heat exchange tubes and "U" type elbows; or / Adjust the heat transfer by changing the diameter and length of the "U" type heat exchange tubes Ability size.

The 901 straight tube and the 902 "U" type heat exchange tube have the smallest diameter, and are located behind the distributor 6, and the other series of "U" type heat exchange tubes are equal to or smaller than the 902 "U" type heat exchange tubes. The diameter is connected by a suitable "U" elbow.

Since the vapor-liquid two-phase complex tube-process medium has a phase change in the heat exchange process, a single tube-pass diameter cannot satisfy the optimal heat transfer performance, and the above arrangement can effectively solve the problem. Tube-pass medium (refrigerant is a liquid-based vapor-liquid two-phase body. During the heat exchange process, the volume rapidly expands due to the continuous heat absorption of the liquid, and the tube-pass medium 1 is at the front half of the single-path heat exchange tube. The flow rate is not enough, but the flow rate is too fast at the rear half of the heat transfer tube, and the resistance increases, which affects the heat exchange efficiency. Rate, the above measures have solved this problem well and improved the heat exchange efficiency.

The baffle 11 is a spiral baffle or a bow baffle, and the edge of the baffle is provided with a skirt having a thickness smaller than that of the baffle. The skirt can overcome the gap between the casing 10 and the baffle due to the dimensional tolerance, avoiding the sidestream and leakage of the medium 2, and ensuring that the baffle does not hang in the casing 10, avoiding the "U" type. The vibration of the heat exchange tube improves the reliability and service life of the heat exchanger product and improves the heat exchange efficiency.

The novel shell-and-tube heat exchanger of the present invention can also adopt the following structure. Figures 5, 6, 7, 8, 9, 10, the novel shell-and-tube heat exchanger comprises a medium inlet 3 and a medium outlet 4. a housing 10, a plurality of U-shaped heat exchange tubes 9 disposed in the housing 10, a baffle 11 disposed in the housing 10, and a cover 12 fixed to an end of the housing 10. The housing 10 is end-sealed and has an opening at the other end. The cover 12 seals the opening. The cover 12 is provided with a medium inlet 1 and a medium-outlet 2. The U-shaped heat exchange tube comprises a straight tube and a U-shaped tube. The elbow is inserted into the connecting hole of the baffle 11, and the gap between the baffle 11 and the inner surface of the casing 10 is as small as possible to avoid leakage, and the medium 1 is passed through the distributor 6 Connected with the inlets of the plurality of U-shaped heat exchange tubes 9, the medium-outlet 2 is connected through the collector 7 and the outlets of the plurality of U-shaped heat exchange tubes 9; the U-shaped heat exchange tubes 9 are changed a diameter pipe, and a straight pipe having a portion connected to the distributor 6 has a minimum outer diameter; the collector 7 includes a body 701 and is uniformly disposed at a plurality of collecting holes 702 communicating with the plurality of U-shaped heat exchange tubes 9 on the body 701, a collecting chamber 703 communicating with the plurality of collecting holes 702, a mixing chamber 704, and a communication chamber 704 The plurality of external interfaces 705, the external interface 705 and the collecting holes 702 are equal in number, the collecting chamber 703 is one, and the whole collector body is a welded member, which is divided into three parts, the first part is used to open the collecting hole, and the second part is used to open a collecting chamber, a third portion is used for opening an external interface and a mixing chamber, and a central shaft 706 is disposed in the collecting chamber 703, and the central shaft is fixed, and a plurality of outer circumferential surfaces of the central shaft 706 are uniformly distributed. a circular arc groove 707, wherein the circular arc groove 707 is provided with an arc sliding piece 708 capable of 1-2° radial rotation in the circular arc groove 707, and the circular sliding piece 708 is fixed on the arc There are partitioning blades 709, and the plurality of dividing blades 709 divide the collecting chamber 703 into a plurality of partitioning chambers 710 communicating with the collecting holes 702. The dividing chambers are sealed chambers, and adjacent dividing chambers are not connected to each other. The dividing cavity 710 passes through the section Communication holes 711 and the mixing chamber 704.

In order to further improve the heat exchange efficiency, a second distributor 18 is disposed between the distributor 6 and the inlet of the U-shaped heat exchange tube 9, and the distributor 6 and the second distributor 18 pass through the connecting pipe. In connection, the second distributor 18 includes a cylindrical body 1801, a plurality of medium inlet holes 1802 evenly disposed on the cylindrical body 1801 and the distributor 6 and the plurality of U-shaped heat exchange tubes 9 The plurality of medium outlet holes 1803 and the intermediate holes 1804 are connected to each other, and the medium inlet holes 1802 are in communication with the number of the medium outlet holes, and the positions are correspondingly arranged on the two end faces of the cylinder, the cylinder is divided into three parts, and the first part is provided with the medium inlet hole The second part is provided with a medium exit hole, the third part is provided with a middle hole, the middle hole 1804 is provided with a fixed shaft 1805, the fixed shaft 1805 is non-rotatable, and the fixed shaft 1805 is provided with a plurality of circles on the outer circumferential surface thereof. Arc chute 1806, the circular arc chute 1806 is provided with a sliding piece 1807 which can rotate 2_3° in the circular arc chute 1806, and the arc sliding plate 1807 is fixed with a blade 1808, and the plurality of the blades The intermediate hole 1804 is divided into a plurality of variable cavities 1809 that communicate the media inlet aperture 1802 and the media outlet aperture 1803.

The above description is only an explanation of the present invention, so that those skilled in the art can fully implement the present solution, but it is not intended to limit the present invention. Those skilled in the art can make the present embodiment as creative as needed after reading the present specification. Modifications to contributions, these are not creative changes. However, it is protected by patent law as long as it is within the scope of the claims of the present invention.

Claims

Claim

1. A novel shell-and-tube heat exchanger, characterized in that: the novel shell-and-tube heat exchanger is provided with an inlet for a tube-passing medium inlet (1) and a plurality of U-shaped heat exchange tubes (9) The tube-pass medium entering the tube-process medium inlet (1) is uniformly distributed to the distributor (6) in each U-shaped heat exchange tube (9); the U-shaped heat exchange tube (9) is two connected to each other One or more U-shaped heat exchange tubes; two or more U-shaped heat exchange tubes are connected in series by a U-shaped elbow (8), by changing the number of U-shaped heat exchange tubes (9) in series, heat exchange The tube length of the tube is multiplied, and the tube-pass medium is repeatedly folded back and forth in two or more U-shaped heat exchange tubes to compensate for the disadvantage of insufficient tube length, the dispenser (6) and the U-shaped The connection between the heat transfer tubes (9) is spliced.

2. The novel shell and tube heat exchanger according to claim 1, further comprising: said tubular medium outlet (2) and said plurality of tubes in a novel shell and tube heat exchanger U-shaped heat exchange tube (9) collector connected to the outlet (7).

The novel shell and tube heat exchanger according to claim 2, characterized in that the baffle (11) is a spiral or arcuate baffle.

The novel shell-and-tube heat exchanger according to claim 1 or 2 or 3, wherein the U-shaped heat exchanger tube is a reduced diameter tube or a equal diameter tube.

The novel shell-and-tube heat exchanger according to claim 1 or 2 or 3, characterized in that: the inlet end of the distributor (6) is a threaded tube (5), and the medium is produced in the threaded tube (5) The turbulent flow is thoroughly mixed into the distributor (6) to improve the distribution effect.

The novel shell and tube heat exchanger according to claim 5, wherein the material of the U-shaped elbow (8) and the U-shaped heat exchange tube (9) is copper, nickel white copper, stainless steel, titanium , aluminum or aluminum alloy.

7. A novel shell and tube heat exchanger, comprising: a casing (10) having a medium inlet (3) and a medium outlet (4), a plurality of U-shaped heat exchange tubes (9), a baffle (11), a cover plate (12) for closing the casing (10) is fixed at an end of the casing (10), and the cover plate (12) is provided with a medium inlet

(1) and the medium outlet (2), in the shell-and-tube heat exchanger, the medium inlet (1) is connected through the distributor (6) and the inlets of the plurality of U-shaped heat exchange tubes (9), the medium one The outlet (2) is in communication with the outlet of the plurality of U-shaped heat exchange tubes (9) through a collector (7); the distributor (6) includes a dispenser body (601) having a flow hole (601a), The distributor body (601) is provided with a tube-length medium throttling portion for throttling and speed-up of the tube-pass medium entering from the inlet of the medium, and a dispersing mixing portion for dispersing and mixing the tube-passing medium after the throttle-speeding and the speed-up a tubular medium distribution portion that dispenses the mixed tubular process medium; the tubular medium throttle portion includes an orifice plug disposed in the throughflow hole (601a) Claim

(601b), the orifice plug (601b) has a through hole for throttling; the dispersing mixing portion includes a bottom surface of the orifice plug (601b) and the through hole (601a) Forming a mixing chamber (601c) and a cone (601d) disposed on a bottom surface of the through hole (601a) with a diameter gradually decreasing toward the orifice plug (601b); the tube path medium distributing portion includes a plurality of a distribution hole (601e) communicating with the mixing chamber (601c), a linear distance between the axis of the distribution hole (601e) and the axis of the orifice plug (601b) is away from the orifice plug (601b) Linear or non-linear increase.

8. A novel shell and tube heat exchanger, comprising: a housing (10) having a medium inlet (3) and a medium outlet (4), and a plurality of U disposed in the housing (10) a heat exchange tube (9), a baffle (11) disposed in the housing (10), and a cover fixed to an end of the housing (10)

(12), the cover plate (12) is provided with a medium inlet (1) and a medium outlet (2), and the inner medium (1) is replaced by a distributor (6) and the plurality of U-shaped The inlet of the heat pipe (9) is in communication, and the medium-outlet (2) is connected to the outlet of the plurality of U-shaped heat exchange tubes (9) through the collector (7); the U-shaped heat exchange tube (9 is The reducing pipe has a minimum outer diameter of the straight pipe connected to the distributor (6).

The novel shell and tube heat exchanger according to claim 8, wherein the collector (7) comprises a body (701), is disposed on the body (701), and the plurality of U a plurality of collecting holes (702) communicating with the heat exchange tubes (9), a collecting chamber (703) communicating with the plurality of collecting holes (702), a mixing chamber (704), and the mixing chamber (704) a plurality of external interfaces (705), a central axis (706) is disposed in the collection cavity (703), and a plurality of circular arc grooves (707) are uniformly disposed on the outer circumferential surface of the central axis (706), An arc sliding piece (708) is provided in the circular arc groove (707) for 1-2° radial rotation in the circular arc groove (707), and the circular sliding piece (708) is fixed There are separating blades (709), and the plurality of dividing blades (709) divide the collecting chamber (703) into a plurality of partitioning chambers (710) communicating with the collecting holes (702), the dividing chambers (710) ) is connected to the mixing chamber (704) through the orifice (711).

The novel shell and tube heat exchanger according to claim 9, wherein a second distributor is disposed between the distributor (6) and the inlet of the U-shaped heat exchange tube (9) ( 18), the second distributor (18) includes a cylinder (1801), a plurality of medium inlet holes (1802) evenly disposed on the cylinder (1801) and the distributor (6), and a plurality of medium exit holes (1803) and intermediate holes (1804) communicating with the inlets of the plurality of U-shaped heat exchange tubes (9), wherein the intermediate holes (1804) are provided with a fixed shaft (1805), the fixing A plurality of arc chutes (1806) are uniformly arranged on the outer circumferential surface of the shaft (1805), and the arc chute (1806) is provided with a 2-3° diameter in the arc chute (1806) Swivel to the rotation WO 2014/111015 _+T7 ai.l 3⁄4 Κ- -K> PCT/CN2014/070658 piece (1807), the arc sliding piece (1807) is fixed with blades (1808), and the plurality of said blades (1808) will The intermediate hole (1804) is divided into a plurality of variable pockets (1809) that communicate the media inlet (1802) and the media outlet (1803).