Multiple condensation heat exchanger

Abstract

The utility model discloses a multiple condensation heat exchanger, which relates to the technical field of heat exchangers and comprises a shell, partition plates and connecting pipes, the partition plates are arranged in the shell and divide the shell into three heat exchange cavities from top to bottom, spiral heat exchange pipes are mounted in the heat exchange cavities, and the connecting pipes are connected with the spiral heat exchange pipes. According to the heat exchanger, the three sections of bent spiral heat exchange pipes which are adjacent end to end are arranged in the shell, triple condensation heat exchange of smoke can be achieved, and therefore the heat exchange rate can be improved, heat loss can be reduced, the heat exchange efficiency can be improved, and the heat exchange efficiency can be improved. In addition, heat exchange fins are arranged on the outer wall of the spiral heat exchange pipe, the heat transfer area of the spiral heat exchange pipe can be increased, the heat exchange efficiency is further improved, a filter is installed at the water inlet end, and the filter can filter impurities in water entering the water inlet end and used for absorbing heat; impurities in the water body are prevented from entering the shell to block the vent holes and further reduce the heat exchange efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchangers, in particular to a multiple condensation heat exchanger. Background Art

[0002] A condensing heat exchanger is a type of heat exchanger that cools and condenses high-temperature, high-pressure gaseous fluid into a liquid form. Its operating principle is as follows: a high-temperature, high-pressure gaseous fluid (such as refrigerant vapor in a condenser) enters from one side of the tube and flows along the tube wall. A low-temperature, low-pressure liquid fluid (such as condensed water in a condenser) enters from the other side of the tube and flows along the tube wall. The two fluids exchange heat on the tube wall, with the high-temperature, high-pressure gaseous fluid transferring heat to the low-temperature, low-pressure liquid fluid. The high-temperature, high-pressure gaseous fluid cools and condenses into a liquid fluid, which is then discharged from the other side of the tube. The low-temperature, low-pressure liquid fluid absorbs the heat from the high-temperature, high-pressure gaseous fluid, causing its temperature to rise.

[0003] After searching, patent authorization announcement number CN 217654114 U discloses a multiple condensing heat exchanger, "the heat exchanger body includes a shell, a burner head and a smoke exhaust port, the shell encloses a heat exchange chamber, the burner head is arranged in the heat exchange chamber, and the smoke exhaust port and the shell are connected to each other. The condensation component includes a first coil, a second coil and a third coil, and the first coil, the second coil and the third coil are arranged in the heat exchange chamber in sequence according to the extension direction of the burner head." However, during use of the above-mentioned heat exchanger, the contact area between the coil and the flue gas in the heat exchange chamber is not large enough, the heat exchange efficiency is not high enough, and it lacks a structure to filter impurities in the water body during water supply, and impurities in the water body entering the shell are easy to cause blockage. Utility Model Content

[0004] The purpose of the present invention is to provide a multiple condensing heat exchanger to solve the problems raised in the above background technology.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] A multiple condensing heat exchanger comprises a shell, a partition plate and a connecting pipe, the interior of the shell is provided with a partition plate, the partition plate divides the shell into three heat exchange chambers from top to bottom, a spiral heat exchange tube is installed in the heat exchange chamber, and the upper and lower adjacent spiral heat exchange tubes are connected end to end by a connecting pipe arranged outside the shell, heat exchange fins are provided on the surface of the spiral heat exchange tube, air vents are provided on the partition plate, and the three heat exchange chambers are connected to each other through the air vents, the upper and lower parts of the shell are respectively provided with an air inlet end and an air outlet end, a first outer cover and a second outer cover are respectively installed on both sides of the shell, the top of the first outer cover is provided with a water outlet end, and the bottom of the second outer cover is provided with a water inlet end, the water outlet end and the water inlet end are respectively connected to the uppermost spiral heat exchange tube and the lowermost spiral heat exchange tube, and a filter is installed in the middle of the water inlet end.

[0007] As a further solution of the present invention: the filter includes a horizontal tube body, a vertical tube body, a filter mesh cylinder, an end cover and a sealing ring. The horizontal tube body and the vertical tube body are cross-intersected to form a whole. The two ends of the horizontal tube body are sealed with two parts of the water inlet end. A filter mesh cylinder is provided in the vertical tube body. A water inlet hole is opened on the filter mesh cylinder facing the tube mouth of the horizontal tube body. An end cover is installed on the top of the filter mesh cylinder. A sealing ring is provided between the end cover and the vertical tube body. Screws are installed on the end cover, and the end cover is fixedly connected to the vertical tube body by screws.

[0008] As a further solution of the present invention: the size of the water inlet hole is larger than the size of the pipe opening of the horizontal tube body.

[0009] As a further solution of the present invention, the ventilation holes provided on the two partition plates are arranged diagonally.

[0010] As a further solution of the present invention: the first outer cover and the second outer cover are fixedly connected to the shell by bolts.

[0011] Compared with the prior art, the beneficial effects of the present invention are:

[0012] 1. The utility model can realize triple condensation heat exchange of flue gas by arranging three sections of bent spiral heat exchange tubes adjacent to each other in the shell, thereby improving the heat exchange rate and reducing heat loss. In addition, by arranging heat exchange fins on the outer wall of the spiral heat exchange tube, the heat transfer area of ​​the spiral heat exchange tube can be increased, thereby further improving the heat exchange efficiency.

[0013] 2. The utility model installs a filter at the water inlet, which can filter impurities in the water entering the water inlet for absorbing heat, thereby preventing impurities in the water from entering the shell and causing blockage of the vents, thereby reducing the heat exchange efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a front cross-sectional view of a multiple condensing heat exchanger.

[0015] Figure 2 A multiple condensing heat exchanger Figure 1 Overall side view of the middle shell.

[0016] Figure 3 A multiple condensing heat exchanger Figure 1 Schematic diagram of the internal structure of the filter.

[0017] 1. Shell; 2. Partition plate; 3. Heat exchange chamber; 4. Spiral heat exchange tube; 5. Heat exchange fin; 6. Connecting pipe; 7. First outer cover; 8. Second outer cover; 9. Vent; 10. Air inlet; 11. Air outlet; 12. Water inlet; 13. Water outlet; 14. Filter; 1401. Horizontal tube; 1402. Vertical tube; 1403. Filter screen; 1404. End cover; 1405. Sealing ring; 15. Screw; 16. Water inlet. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0019] See also Figure 1-2 In the embodiment of the present invention, a multiple condensing heat exchanger includes a shell 1, a partition plate 2 and a connecting pipe 6. The interior of the shell 1 is provided with a partition plate 2, which divides the shell 1 into three heat exchange chambers 3 from top to bottom. A spiral heat exchange tube 4 is installed in the heat exchange chamber 3, and the upper and lower adjacent spiral heat exchange tubes 4 are connected end to end by a connecting pipe 6 arranged outside the shell 1. Heat exchange fins 5 are provided on the surface of the spiral heat exchange tube 4. Ventilation holes 9 are opened on the partition plate 2. The three heat exchange chambers 3 are connected to each other through the vent holes 9. An air inlet end 10 and an air outlet end 11 are respectively provided at the upper and lower parts of the shell 1. A first outer cover 7 and a second outer cover 8 are respectively installed on both sides of the shell 1. A water outlet end 13 is provided on the top of the first outer cover 7, and a water inlet end 12 is provided at the bottom of the second outer cover 8. The water outlet end 13 and the water inlet end 12 are respectively connected to the uppermost spiral heat exchange tube 4 and the lowermost spiral heat exchange tube 4;

[0020] The ventilation holes 9 on the two partition plates 2 are arranged diagonally, so that the flue gas can bend and move forward in the heat exchange chamber 3;

[0021] The first outer cover 7 and the second outer cover 8 are fixedly connected to the housing 1 by bolts. The first outer cover 7 and the second outer cover 8 can protect the connecting pipe 6 exposed to the outside and prevent the connecting pipe 6 from being damaged by collision.

[0022] See also Figure 1 and Figure 3, a filter 14 is installed in the middle of the water inlet end 12, and the filter 14 includes a horizontal tube body 1401, a vertical tube body 1402, a filter cylinder 1403, an end cover 1404 and a sealing ring 1405. The horizontal tube body 1401 and the vertical tube body 1402 cross to form a whole, and the two ends of the horizontal tube body 1401 are sealed with the two parts of the water inlet end 12, and a filter cylinder 1403 is provided in the vertical tube body 1402. A water inlet hole 16 is opened on the filter cylinder 1403 facing the pipe mouth of the horizontal tube body 1401, and an end cover 1404 is installed on the top of the filter cylinder 1403. A sealing ring 1405 is provided between the end cover 1404 and the vertical tube body 1402, and a screw 15 is installed on the end cover 1404, and the end cover 1404 is fixedly connected to the vertical tube body 1402 by the screw 15;

[0023] The size of the water inlet hole 16 is larger than the size of the pipe opening of the transverse tube body 1401. This design can reduce the probability of misalignment between the water inlet hole 16 and the pipe opening of the transverse tube body 1401.

[0024] The working principle of this utility model is:

[0025] Before use, first connect the air inlet end 10 and the air outlet end 11 to the two ends of the smoke exhaust pipe respectively, and connect the water inlet end 12 and the water outlet end 13 to the two ends of the water pipe respectively. During use, the smoke enters the shell 1 from the air inlet end 10, and then flows from the upper heat exchange chamber 3 to the middle heat exchange chamber 3, and then flows from the middle heat exchange chamber 3 to the lower heat exchange chamber 3 and enters the bottom layer. At the same time, the external water enters the bottom spiral heat exchange tube 4 from the water inlet end 12 under the transportation of the water pump, and then enters the middle spiral heat exchange tube 4 and the top spiral heat exchange tube 4 in turn. The smoke and the spiral heat exchange tube 4 are in full contact, and the heat in the smoke is transferred to the water through the spiral heat exchange tube 4 to realize heat exchange. After heat exchange, the smoke and condensed water are discharged from the air outlet end 11, and the water after absorbing heat is discharged from the water outlet end 13.

[0026] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A multiple condensing heat exchanger comprising a shell (1), a partition plate (2) and a connecting pipe (6), characterized in that: A partition plate (2) is provided inside the shell (1), and the partition plate (2) divides the shell (1) into three heat exchange chambers (3) from top to bottom. A spiral heat exchange tube (4) is installed in the heat exchange chamber (3). The ends of two adjacent spiral heat exchange tubes (4) are connected by a connecting tube (6) provided outside the shell (1). Heat exchange fins (5) are provided on the surface of the spiral heat exchange tube (4). A vent (9) is provided on the partition plate (2), and the three heat exchange chambers (3) are connected to each other through the vent (9). The upper and lower parts of the shell (1) are respectively provided with an air inlet end (10) and an air outlet end (11); a first outer cover (7) and a second outer cover (8) are respectively installed on both sides of the shell (1); a water outlet end (13) is provided at the top of the first outer cover (7); a water inlet end (12) is provided at the bottom of the second outer cover (8); the water outlet end (13) and the water inlet end (12) are respectively connected to the uppermost spiral heat exchange tube (4) and the lowermost spiral heat exchange tube (4); a filter (14) is installed in the middle of the water inlet end (12).

2. The multiple condensation heat exchanger according to claim 1, characterized in that: The filter (14) comprises a horizontal tube (1401), a vertical tube (1402), a filter screen cartridge (1403), an end cap (1404) and a sealing ring (1405). The horizontal tube (1401) and the vertical tube (1402) are cross-connected to form a whole. The two ends of the horizontal tube (1401) are sealedly connected to the water inlet end (12). The filter screen cartridge (1403) is provided in the vertical tube (1402). A water inlet hole (16) is provided on the filter screen cylinder (1403) facing the pipe opening of the horizontal tube body (1401). An end cover (1404) is installed on the top of the filter screen cylinder (1403). A sealing ring (1405) is provided between the end cover (1404) and the vertical tube body (1402). A screw (15) is installed on the end cover (1404), and the end cover (1404) is fixedly connected to the vertical tube body (1402) via the screw (15).

3. The multiple condensation heat exchanger according to claim 2, characterized in that: The size of the water inlet hole (16) is larger than the size of the pipe opening of the horizontal tube body (1401).

4. The multiple condensation heat exchanger according to claim 1, characterized in that: The ventilation holes (9) provided on the two partition plates (2) are arranged diagonally.

5. The multiple condensation heat exchanger according to claim 1, characterized in that: The first outer cover (7) and the second outer cover (8) are fixedly connected to the housing (1) via bolts.

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