CN219037723U - Sleeve type heat pipe exchanger - Google Patents

Abstract

The application provides a sleeve type heat pipe heat exchanger, which comprises a heat pipe, a partition plate and a sleeve, wherein the heat pipe penetrates through the partition plate, the part of the heat pipe, which is positioned on the upper side of the partition plate, is a condensation section, and the sleeve is sleeved with the condensation section; the device also comprises a communicating pipe, wherein the communicating pipes are at least communicated with the lower ends of the two sleeves, the communicating pipes are welded on the upper surface of the partition plate and form welding seams, the welding seams are projected from top to bottom, and the welding seams are positioned on the outer contour of the projection surface of the communicating pipe. In this application, communicating pipe direct welding is to the upper surface of baffle to the welding seam is located the outline of the projection face of communicating pipe, like this, opens the top shrouding of upside casing, when observing from the top down, can directly observe the welding seam of communicating pipe and baffle, and the welding seam of communicating pipe and heat pipe also does not shelter from, so the welding seam after communicating pipe welding in the application does not have the negative welding seam of unable observation of background art in the welding seam, can in time discover leakage and handle.

Description

Sleeve type heat pipe exchanger

Technical Field

The utility model relates to the technical field of heat exchange equipment, in particular to a sleeve type heat pipe heat exchanger.

Background

Referring to fig. 8 and 9, fig. 8 is a schematic diagram of a sleeve type heat pipe low-temperature economizer; fig. 9 is an enlarged view of the portion a in fig. 8.

The sleeve type heat pipe low-temperature economizer comprises an upper box body and a lower box body, wherein the upper box body is a water channel side, the lower box body is a flue gas side, the upper box body and the lower box body are separated by a partition plate 05, a heat pipe 04 penetrates through the partition plate 05, the upper side of the partition plate 05 is a condensation section, the lower side of the partition plate 05 is an evaporation section, and a sleeve 03 is sleeved on the outer side of the condensation section. The sleeve type heat pipe low-temperature economizer also comprises an upper communicating pipe 02 and a lower communicating pipe 01, wherein the upper communicating pipe 02 is communicated with the upper ends of the plurality of sleeves 03, and the lower communicating pipe 01 is communicated with the upper ends of the plurality of sleeves 03. The cooling water enters the upper communicating pipe 02 from the water inlet, is distributed to the plurality of sleeves 03, and is collected to the lower communicating pipe 01 and can flow out from the water outlet.

As shown in fig. 8, the plurality of sleeves 03 and the upper communication pipe 02 and the lower communication pipe 01 are welded, and generally, the upper sealing plate can only be opened by the upper case, and at this time, the welding position of the lower communication pipe 01 and the sleeves 03 is observed from top to bottom, and part of the welding seam is shielded by the lower communication pipe 01, so that the part of the welding seam cannot be observed, that is, the female welding seam is difficult to weld and leak repair once the female welding seam leaks in operation. If the continuous water leakage is not handled in time, the water leakage will accumulate to the partition 05. Because the lower side of the partition plate 05 is hot flue gas, and the upper side of the partition plate is cooling water with low temperature, sulfuric acid vapor in the hot flue gas can be condensed into liquid sulfuric acid under the cooling action of the cooling water and is adhered to the partition plate 05, so that the partition plate 05 corrodes or even is perforated, and once leaked water is accumulated on the partition plate and enters the flue gas at the lower side from the perforation, serious accidents such as dust accumulation and hardening at the flue gas side can be caused.

Disclosure of Invention

The application provides a sleeve type heat pipe heat exchanger, which comprises a heat pipe, a partition plate and a sleeve, wherein the heat pipe penetrates through the partition plate, the part of the heat pipe, which is positioned on the upper side of the partition plate, is a condensation section, and the sleeve is sleeved with the condensation section; the device also comprises a communicating pipe, wherein the communicating pipes are at least communicated with the lower ends of the two sleeves, the communicating pipes are welded on the upper surface of the partition plate and form welding seams, the welding seams are projected from top to bottom, and the welding seams are positioned on the outer contour of the projection surface of the communicating pipe.

In a specific embodiment, the double pipe heat exchanger comprises at least one heat exchange pipe row, the heat exchange pipe row comprises a plurality of heat pipes, the communicating pipe comprises a lower connecting pipe, the double pipe heat exchanger further comprises an upper connecting pipe, the upper connecting pipe is communicated with two adjacent heat exchange pipe rows at the upper ends of the sleeves, the lower connecting pipe is communicated with two adjacent heat exchange pipe rows at the lower ends of the sleeves, and the upper connecting pipe and the lower connecting pipe are staggered in the arrangement direction of a plurality of heat pipes so as to connect a plurality of heat pipes in series.

In one embodiment, the communicating pipe includes a drain pipe, and the drain pipe and the lower connecting pipe are alternately arranged in order along an arrangement direction of the plurality of heat pipes to communicate all of the sleeves.

In a specific embodiment, the sleeve is provided with a drain hole, the drain hole is in butt joint with a pipe orifice of the drain pipe, and the flow cross section area of the drain hole is smaller than that of the lower connecting pipe.

In a specific embodiment, the drain hole and the pipe orifice are both semicircular, and the radius of the drain pipe is 2-3 times of the radius of the drain hole; and/or the lower connecting pipe is arched, and the radius of the drain hole is 1/10 of the width of the lower connecting pipe.

In one embodiment, the cross section of the communicating tube is arched or semicircular.

In one specific embodiment, the partition plate comprises a plurality of trapezoid pipes which are arranged side by side, the cross section of each trapezoid pipe is trapezoid, the double-pipe heat exchanger comprises at least two rows of heat exchange pipe rows, and each heat exchange pipe row comprises a plurality of heat pipes; the heat pipes of each row of heat exchange pipe rows penetrate through one trapezoid pipe, and the short sides of the trapezoid pipes and the long sides of the adjacent partition boards are welded and fixed.

In one embodiment, the sleeve has an outer diameter that is 1.4 to 2 times the outer diameter of the heat pipe.

In one embodiment, the heat pipe heat exchanger comprises at least two rows of heat exchange pipes, the rows of heat exchange pipes comprising a plurality of the heat pipes; the distance between two adjacent heat pipes in each heat exchange pipe row is a longitudinal distance, the distance between the heat exchange pipe and the heat pipe in the adjacent heat exchange pipe row is a transverse distance, and the transverse distance and the longitudinal distance are 1.4-2 times of the diameter of the sleeve.

In this application, communicating pipe direct welding is to the upper surface of baffle to the welding seam is located the outline of the projection face of communicating pipe, like this, opens the top shrouding of upside casing, when observing from the top down, can direct observation communicating pipe and the welding seam of baffle, communicating pipe and the welding seam of heat pipe do not shelter from yet, so the welding seam after the communicating pipe welding in the application does not have the background art can't observe the female welding seam, all welding seams are the male welding seam, if produce and leak, can in time discover and adopt dedicated extension welder to weld the benefit of leaking to solve the problem that the cooling water that the female welding seam mentioned in the background art is difficult to discover, handle and lead to leaks to the baffle and leaks to the flue gas side.

Drawings

Fig. 1 is a schematic structural diagram of a double pipe heat pipe exchanger according to an embodiment of the present application;

FIG. 2 is a top view of FIG. 1;

FIG. 3 is a cross-sectional view taken along the direction A-A in FIG. 1;

FIG. 4 is a cross-sectional view taken along B-B in FIG. 1;

FIG. 5 is an enlarged view of the portion I of FIG. 4;

FIG. 6 is a cross-sectional view taken along line C-C of FIG. 1;

FIG. 7 is an enlarged view of the portion II of FIG. 6;

FIG. 8 is a schematic diagram of a telescopic heat pipe low-temperature economizer;

fig. 9 is an enlarged view of the portion a in fig. 8.

The reference numerals in fig. 1-9 are illustrated as follows:

01-lower communicating pipe; 02-upper communicating pipe; 03-a sleeve; 04-heat pipe;

100-upper side housing;

1-a heat pipe; 1 A-A condensation section; 1 b-an evaporation section;

2-a separator; 21-a trapezoidal tube; 211-short sides; 212-long sides;

3-sleeve; 3 A-A drain hole;

4-inlet water tank;

5- -outlet tank;

6-an upper connecting pipe;

7-a drainage tank;

8-a lower connecting pipe;

9-a drain pipe;

10-a drainage connection pipe;

11-water inlet connecting pipe;

12-water outlet connection pipe.

Detailed Description

In order to better understand the aspects of the present utility model, the present utility model will be described in further detail with reference to the accompanying drawings and detailed description.

Referring to fig. 1-3, fig. 1 is a schematic structural diagram of a double pipe heat pipe exchanger according to an embodiment of the present application; FIG. 2 is a top view of FIG. 1; fig. 3 is a cross-sectional view taken along the direction A-A in fig. 1.

The double pipe heat exchanger in this embodiment includes a heat pipe 1, a partition plate 2 and a sleeve 3, wherein the upper side of the partition plate 2 is a cooling water side, the lower side of the partition plate 2 is a flue gas side, and the double pipe heat exchanger may include a housing to accommodate the heat pipe 1, the partition plate 2 and the sleeve 3. The partition plate 2 divides the housing into two cases, an upper case 100 being a cooling water side and a lower case being a flue gas side. The heat pipe 1 passes through the partition plate 2, the part of the heat pipe 1, which is positioned on the upper side of the partition plate 2, is a condensation section 1a, the part of the heat pipe 1, which is positioned on the lower side of the partition plate 2, is an evaporation section 1b, the sleeve 3 is sleeved on the outer side of the condensation section 1a, the upper end of the sleeve 1 is closed and fixedly welded with the heat pipe 1, cooling water flows in a space formed between the sleeve 3 and the condensation section 1a, flue gas flows into the flue gas side, the flue gas flows into the heat pipe 1 for heat exchange, a medium in the heat pipe 1 flows upwards to enter the condensation section 1a through evaporation, and after heat exchange with the cooling water in the sleeve 3, the medium is condensed and flows back to the evaporation section 1b.

The double pipe heat exchanger in this embodiment further includes a communicating pipe, and the lower connection pipe 8 and the drain pipe 9 illustrated in fig. 1 are both communicating pipes. The communicating pipe is communicated with at least two sleeves 3, and is welded on the upper surface of the partition plate 2 to form a welding line, the welding line is projected from top to bottom, and the welding line is positioned on the outer contour of the projection surface of the communicating pipe.

That is, in this embodiment, the communicating pipe is directly welded to the upper surface of the partition board 2, and the welding seam is located on the outer contour of the projection surface of the communicating pipe, so that when the top sealing plate of the upper shell 100 is opened, the welding seam between the communicating pipe and the partition board 2 can be directly observed from top to bottom, and the welding seam between the communicating pipe and the heat pipe 1 is not shielded, so that the welding seam after the welding of the communicating pipe in this embodiment has no female welding seam which cannot be observed in the background art, all the welding seams are male welding seams, if leakage occurs, the special lengthening welding gun can be timely found and adopted for welding and leak repairing, and the problem that the cooling water caused by the difficult finding and processing of the female welding seam in the background art leaks to the partition board 2 and leaks to the flue gas side is solved.

Specifically, the double pipe heat exchanger in this embodiment includes at least one heat exchange pipe row including a plurality of heat pipes 1, the plurality of heat pipes 1 are arranged from left to right in fig. 1, the above-mentioned communicating pipe includes a lower connecting pipe 8, the double pipe heat exchanger further includes an upper connecting pipe 6, the upper connecting pipe 6 communicates with the upper ends of two adjacent double pipes 3 in one heat exchange pipe row, the lower connecting pipe 8 communicates with the lower ends of two adjacent double pipes 3 in one heat exchange pipe row, the upper connecting pipe 6 and the lower connecting pipe 8 are staggered in the arrangement direction of the plurality of heat pipes, the plurality of heat pipes in one heat exchange pipe row are arranged in the left-right direction in fig. 1, the upper connecting pipe 6 and the lower connecting pipe 8 are staggered in the left-right direction to connect all the double pipes 3 in series, i.e. the upper end of one double pipe 3 communicates with one adjacent double pipe 3 on one side through the lower connecting pipe 8, the lower ends communicate with the other adjacent double pipe 3 on the other side, of course, for one heat exchange pipe row, the two double pipes 3 on the outermost side are water inlet pipe or water outlet pipe on one side communicates with the other side, and the other side communicates with the adjacent double pipe 3 on the other side through the upper connecting pipe 6 or the lower connecting pipe 3. In fig. 1, since a plurality of heat exchange tube rows are provided, water inlet connection pipes 11 of all the heat exchange tube rows are communicated with the inlet water tank 4, and water outlet connection pipes 12 are communicated with the outlet water tank 5.

Thus, a serpentine loop of the cooling water shown in fig. 1 can be formed, and the cooling water enters the first sleeve 3 on the right side from the water inlet connecting pipe 11 and flows downwards, then enters the second sleeve 3 on the right side from the lower end of the first sleeve 3 through the lower connecting pipe 8, flows upwards, then enters the third sleeve 3 and flows downwards, and after the cooling water alternately flows upwards and downwards, flows out of the outlet connecting pipe 12 from the sleeve 3 on the leftmost side, and the flow direction of the cooling water alternately changes from top to bottom and from bottom to top, so that the heat exchange efficiency can be improved.

Referring to fig. 1 again, although the flow direction of the cooling water is alternately changed from top to bottom and from bottom to top, in general, the flow direction of the flue gas on the flue gas side of the double-pipe heat pipe exchanger is from right to left, and then the overall flow direction of the cooling water and the flow direction of the flue gas are in a countercurrent state, and the heat exchange temperature difference of the cold and hot media in the countercurrent state is the largest from the thermodynamic angle, so that the heat exchange effect is the best. It is understood that the flow direction of the cooling water on the cooling water side is not limited to the left-to-right direction, and is opposite to the direction in which the flue gas enters the flue gas side.

Further, the communication pipe in this embodiment further includes a drain pipe 9, and the drain pipe 9 and the lower connection pipe 8 are alternately arranged in order along the arrangement direction of the plurality of heat pipes 1 to communicate all of the sleeves 3. The lower connecting pipe 8 and the drain pipe 9 are directly welded on the upper surface of the partition board 2, and the welding seams are male welding seams. When the equipment stops working and the water stored in the sleeve 3 needs to be discharged, the water can be thoroughly discharged through the drain pipe 9 and the lower connecting pipe 8 arranged at the lower part of the sleeve 3. In fig. 1, the plurality of sleeves 3 are collected by the drain pipe 9 and the lower connecting pipe 8 and can be discharged into the drain tank 7 together from the drain pipe 10, and the drain pipe 10 can be communicated with the outermost sleeve 3. As shown in fig. 1, the water outlet connection pipe 12 is communicated with the upper end of the sleeve 3 at the outermost left side, and the water discharge connection pipe 10 is communicated with the lower end of the sleeve 3 at the outermost left side, so that the water storage is discharged. Similarly, since a plurality of heat exchange tube rows are arranged, the water outlet connection tubes 10 of all the heat exchange tube rows are communicated with the water drainage box 7.

Referring to FIGS. 4-7, FIG. 4 is a cross-sectional view taken along line B-B in FIG. 1; FIG. 5 is an enlarged view of the portion I of FIG. 4; FIG. 6 is a cross-sectional view taken along line C-C of FIG. 1; fig. 7 is an enlarged view of the area II in fig. 6.

The sleeve 3 in this embodiment is provided with a drain hole 3a, the drain hole 3a is communicated with the orifice of the drain pipe 9, and the flow cross-sectional area of the drain hole 3a is smaller than that of the orifice, i.e. the design of 'small hole and large pipe' is adopted. The drain hole 3a mainly plays a role in draining and storing water, and during normal operation, the cooling water mainly flows from the lower connecting pipe 8, is provided with a larger cross-sectional area, is beneficial to the series connection of the cooling water paths, and avoids the cooling water flowing from the drain pipe 9, so that the flow sectional area of the drain hole 3a is smaller than that of the lower connecting pipe 8. Further, since the flow cross-sectional area of the drain hole 3a is relatively small, if the drain pipe 9 and the drain hole 3a are set to be the same size, the drain pipe 9 is easily blocked by impurities to cause unsmooth drainage, and the drain pipe 9 is set to have a slightly large cross-sectional area to be more favorable for the progress of welding.

As shown in fig. 5, the drain hole 3a and the pipe orifice may be both provided in a semicircular shape, and the radius R of the drain pipe 9 may be designed to be 2 to 3 times the radius R of the drain hole 3a, so that the drain of the drain pipe 9 is ensured to be unobstructed and the welding is facilitated. Further, it will be appreciated that the drain pipe 9 is arranged in a semicircular shape, so that when the drain pipe 9 is welded to the upper surface of the partition plate 2, the weld is located at the outermost side of the drain pipe 9, which can be observed from above.

In this embodiment, the lower connecting pipe 8 is arched, the lower connecting pipe 8 includes two opposite side walls, the two side walls extend in parallel and vertically, and further includes an arc top wall, the arc top wall is connected with the two side walls, a space w between the two side walls is the width of the lower connecting pipe 8, and the height of the two side walls is h. The lower connecting pipe 8 that so set up compares in the arc pipe, can have bigger cross-sectional area of flow, is convenient for satisfy the circulation of cooling water to during the welding, the welding seam is in the outside of lower connecting pipe 8, is convenient for observe from the top down.

As described above, the flow cross-sectional area of the drain hole 3a is smaller than that of the lower connection pipe 8, and in this embodiment, the radius r of the drain hole 3a may be 1/10 of the width w of the lower connection pipe 8, so that the drain hole 3a has a smaller diameter and a larger flow resistance to ensure the circulation of the cooling water along the lower connection pipe 8 and the sleeve 3. The cross-sectional area of the drain pipe 9 may be smaller than that of the lower connection pipe 8, and although the drain is mainly dependent on the cross-sectional area of the drain hole 3a, the drain pipe 9 is smaller than that of the lower connection pipe 8, which is also advantageous for achieving the normal circulation flow of the cooling water.

As shown in fig. 6 and 7, the partition plate 2 in the present embodiment includes a plurality of trapezoidal pipes 21 arranged side by side, the cross section of each trapezoidal pipe 21 is trapezoidal, the double pipe heat exchanger includes at least two heat exchange pipe rows, the heat pipe 1 of each heat exchange pipe row passes through one trapezoidal pipe 21, and the width of each trapezoidal pipe 21 is B and is larger than the outer diameter D of the double pipe 3. The cross section of the trapezoid pipe 21 comprises a short side 211 and a long side 212 which are parallel, and the short side 211 and the long side 212 of the adjacent partition plate 2 are welded and fixed, so that the implementation of welding is guaranteed, and the welding effect is guaranteed. As shown in fig. 6 and 7, the welding seam is a triangular welding seam, the lower connecting pipe 8 and the drain pipe 9 are welded with the sleeve 3 along the whole edge of the pipe orifice, both side edges of the lower connecting pipe 8 and the drain pipe 9 are welded with the upper side surfaces of the trapezoidal pipes 21, and the upper side surfaces of all the trapezoidal pipes 21 are flush.

For the above embodiments, the outer diameter D of the sleeve 3 may be 1.4 to 2 times the outer diameter D of the heat pipe 1, thus securing a space between the sleeve 3 and the heat pipe 1 to secure a cooling effect.

As shown in fig. 3, the interval between two adjacent heat exchange tubes 1 in each row of heat exchange tubes 1 in this embodiment is a longitudinal interval n, the interval between a heat exchange tube 1 and a heat exchange tube 1 in an adjacent row of heat exchange tubes 1 is a lateral interval m, and the lateral interval m and the longitudinal interval n are 1.4 to 2 times the diameter of the sleeve 3.

Specific examples are set forth herein to illustrate the principles and embodiments of the present application, and the description of the examples above is only intended to assist in understanding the methods of the present application and their core ideas. It should be noted that it would be obvious to those skilled in the art that various improvements and modifications can be made to the present application without departing from the principles of the present application, and such improvements and modifications fall within the scope of the claims of the present application.

Claims (9)

1. The sleeve type heat pipe heat exchanger is characterized by comprising a heat pipe, a partition plate and a sleeve, wherein the heat pipe penetrates through the partition plate, the part of the heat pipe, which is positioned on the upper side of the partition plate, is a condensation section, and the sleeve is sleeved with the condensation section; the device also comprises a communicating pipe, wherein the communicating pipes are at least communicated with the lower ends of the two sleeves, the communicating pipes are welded on the upper surface of the partition plate and form welding seams, the welding seams are projected from top to bottom, and the welding seams are positioned on the outer contour of the projection surface of the communicating pipe.

2. The double pipe heat exchanger according to claim 1, wherein the double pipe heat exchanger comprises at least one heat exchange pipe row including a plurality of the heat pipes, the communicating pipe includes a lower connecting pipe, the double pipe heat exchanger further includes an upper connecting pipe communicating upper ends of adjacent two of the double pipes in one heat exchange pipe row, the lower connecting pipe communicates lower ends of adjacent two of the double pipes in one heat exchange pipe row, and the upper connecting pipe and the lower connecting pipe are staggered in an arrangement direction of a plurality of the heat pipes to connect a plurality of the heat pipes in series.

3. A double pipe heat exchanger according to claim 2 wherein the communicating pipe includes a drain pipe, and the drain pipe and the lower connecting pipe are alternately arranged in order along an arrangement direction of a plurality of the heat pipes to communicate all the sleeves.

4. A double pipe heat exchanger according to claim 3 wherein the sleeve is provided with a drain hole, the drain hole being in abutment with the mouth of the drain pipe, the drain hole having a cross-sectional flow area smaller than the cross-sectional flow area of the lower connecting pipe.

5. The double pipe heat exchanger as claimed in claim 4, wherein the drain hole and the pipe orifice are both semicircular, and the radius of the drain pipe is 2 to 3 times the radius of the drain hole; and/or the lower connecting pipe is arched, and the radius of the drain hole is 1/10 of the width of the lower connecting pipe.

6. A double pipe heat exchanger as claimed in any one of claims 1 to 4 wherein the cross section of the communicating pipe is arched or semi-circular.

7. A double pipe heat exchanger according to any one of claims 1-5 wherein the separator comprises a plurality of trapezoidal pipes arranged side by side, the cross section of the trapezoidal pipes being trapezoidal, the double pipe heat exchanger comprising at least two rows of heat exchange pipe rows comprising a plurality of the heat pipes; the heat pipes of each row of heat exchange pipe rows penetrate through one trapezoid pipe, and the short sides of the trapezoid pipes and the long sides of the adjacent partition boards are welded and fixed.

8. A double pipe heat exchanger according to any one of claims 1-5, wherein the outer diameter of the sleeve is 1.4-2 times the outer diameter of the heat pipe.

9. The double pipe heat exchanger as claimed in any one of claims 1 to 5, wherein the heat pipe heat exchanger comprises at least two heat exchange pipe rows including a plurality of the heat pipes; the distance between two adjacent heat pipes in each heat exchange pipe row is a longitudinal distance, the distance between the heat exchange pipe and the heat pipe in the adjacent heat exchange pipe row is a transverse distance, and the transverse distance and the longitudinal distance are 1.4-2 times of the diameter of the sleeve.

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