A noise reduction type heating network heater

Abstract

The present invention relates to the field of heat network heaters, specifically a noise-reducing heat network heater, which includes an outer shell, a steam inlet pipe, a drain outlet pipe, a partition, a U-shaped heat exchange tube bundle, a baffle a, and a baffle b; the partition is horizontally arranged on the inner wall of the head a and is inserted into the outer shell, an upper tube sheet and a lower tube sheet are respectively arranged on the upper and lower sides of the left end of the partition, and a tube sheet is arranged at the turning position of the U-shaped heat exchange tube bundle; baffle a is arranged on the partition through a support rod, and baffle b is arranged on the partition, and a wavy steam route is formed on both the upper and lower sides of the partition. In the present invention, the steam heat exchange path is long, and it helps to reduce the internal and external temperature difference of the U-shaped heat exchange tube bundle throughout the entire section, thereby avoiding the U-shaped heat exchange tube bundle from generating high thermal stress, reducing damage to the U-shaped heat exchange tube bundle, and at the same time reducing the noise caused by the generation and release of thermal stress. In addition, disassembly and assembly are simple and convenient, which facilitates the inspection or replacement of the internal structure of the outer shell.

Description

Technical Field

[0001] The present invention relates to the field of heating network heaters, and in particular to a noise reduction type heating network heater. Background Art

[0002] A heat grid heater is a device that uses electricity or fuel to convert thermal energy into hot water or steam. It typically consists of a heating element, a heat exchanger, and a control system. Heat grid heaters are widely used in industrial production, building heating, greenhouse cultivation, and other fields.

[0003] The Chinese patent with authorization announcement number CN204705242U discloses an energy-saving heat network heater that avoids direct contact between steam and condensate, resulting in a low condensate temperature and energy savings; increases the effective tube layout area of the tube sheet; reduces the steam inlet flow rate to avoid damage to equipment and reduce operating noise; and has good heat transfer effects.

[0004] However, the above-mentioned publicly available solution has the following shortcomings: steam transfers heat to the tube bundle from top to bottom, the heat transfer path is short, and near the heated water inlet pipe, there is high-temperature steam outside the tube and cold water inside the tube. The temperature difference between the inside and outside of the tube is large, which will generate large thermal stress in the pipeline, which is easy to damage the pipeline. It is also easy to cause pipeline vibration and noise due to the change and release of thermal stress. Summary of the Invention

[0005] The purpose of the present invention is to propose a noise-reducing heating network heater to address the problems in the background technology of short steam heat exchange path, which may cause large thermal stress in the pipeline near the water inlet, resulting in pipeline damage and pipeline vibration noise.

[0006] The technical solution of the present invention is: a noise-reducing heat network heater, comprising a housing, a head a and a head b provided at the left and right ends of the housing, and a water outlet pipe and a water inlet pipe provided at the top and bottom of the head a; further comprising a steam inlet pipe, a drain outlet pipe, a partition, a U-shaped heat exchange tube bundle, a baffle a, and a baffle b;

[0007] The steam inlet pipe and the drain outlet pipe are respectively arranged on the upper and lower sides of the left end of the shell; the partition is horizontally arranged on the inner wall of the head a and is inserted into the shell. The partition divides the U-shaped heat exchange tube bundle into upper and lower halves. The upper tube sheet and the lower tube sheet are respectively arranged on the upper and lower sides of the left end of the partition. The tube sheet is arranged at the turning position of the U-shaped heat exchange tube bundle, and the tube sheet is connected to the partition. The two ends of the U-shaped heat exchange tube bundle pass through the lower tube sheet and the upper tube sheet to form the water inlet end and the water outlet end respectively; the baffle a is arranged on the baffle through a support rod, and the baffle b is arranged on the baffle and a steam channel is left between the end away from the baffle and the inside of the shell. Multiple heat exchange tube through holes are provided on the baffle a and baffle b. The baffle a and baffle b are alternately arranged on the upper and lower sides of the baffle. A steam circulation groove is provided on the right end of the baffle. A wavy steam route is formed on the upper and lower sides of the baffle.

[0008] Preferably, flanges a are provided on both ends of the shell and on the opposite sections of the head a and the head b, and flange connections are formed between the shell and the head a, and between the shell and the head b.

[0009] Preferably, a plurality of support frames are provided at the bottom of the shell for supporting, and a pressure relief valve is provided at the middle position of the bottom of the shell.

[0010] Preferably, the partition includes an insulation plate and a heat conducting plate arranged at the bottom of the insulation plate, baffle a and baffle b are both heat conductors, and sealing strips are provided on the sides of the insulation plate and the heat conducting plate, and are sealed to the inner wall of the shell through the sealing strips.

[0011] Preferably, it also includes a bend head connected to the right side of the tube sheet through the flange b, and the bend section of the U-shaped heat exchange tube bundle is located in the bend head.

[0012] Preferably, baffle a, baffle b and baffle a are sequentially arranged on the upper and lower sides of the partition from left to right.

[0013] Preferably, baffle b on the partition and baffle a below the partition are both provided with water troughs at the bottom, and baffle b on the partition and baffle a below the partition that are impacted by steam are both provided with guide slopes, and condensed water is gathered through the guide slopes under the drive of steam.

[0014] Preferably, the two groups of baffles a located on the same side of the partition are connected by multiple connecting rods, multiple groups of screws are arranged on a group of baffles a close to the head b, and multiple limit plates are arranged on the right inner wall of the outer shell. The limit plates are provided with through holes for the screws to pass through, and the screws pass through the through holes and are locked by nuts.

[0015] Compared with the prior art, the present invention has the following beneficial technical effects:

[0016] 1. The separation of partitions and multiple groups of baffles a and baffles b extends the steam heat exchange distance, which helps to fully exchange heat.

[0017] 2. The temperature at the tail end of the steam route is lower and is located around the low-temperature water, while the temperature at the head end of the steam route is higher and is located around the high-temperature water. Through the setting of this steam route, the low-temperature water is gradually heated up by heat exchange, which helps to reduce the temperature difference between the inside and outside of the entire U-shaped heat exchange tube bundle, thereby avoiding high thermal stress in the U-shaped heat exchange tube bundle, reducing damage to the U-shaped heat exchange tube bundle, and at the same time reducing noise caused by the generation and release of thermal stress.

[0018] 3. The disassembly and assembly is simple and convenient, and the internal structure of the shell can be quickly removed, making it easy to inspect or replace the internal structure of the shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic structural diagram of an embodiment of the present invention;

[0020] Figure 2 for Figure 1 Schematic diagram of the structure after removing the head a;

[0021] Figure 3 for Figure 2 Schematic diagram of the structure after removing the outer shell;

[0022] Figure 4 for Figure 2 Schematic diagram of part of the structure after removing the head b;

[0023] Figure 5 Schematic diagram of the structure inside the shell;

[0024] Figure 6 Schematic diagram of the steam route.

[0025] Figure numerals: 1. shell; 2. head a; 3. head b; 4. flange a; 5. support frame; 6. pressure relief valve; 7. steam inlet pipe; 8. drain outlet pipe; 9. water inlet pipe; 10. water outlet pipe; 11. partition; 12. heat insulation plate; 13. heat conduction plate; 14. U-shaped heat exchange tube bundle; 15. upper tube sheet; 16. lower tube sheet; 17. elbow head; 18. tube sheet; 19. baffle a; 20. baffle b; 21. heat exchange tube through hole; 22. connecting rod; 23. screw; 24. nut; 25. limit plate; 26. steam circulation groove; 27. support rod; 28. water trough; 29. guide slope; 30. sealing strip; 31. steam route; 32. flange b. DETAILED DESCRIPTION

[0026] Example 1

[0027] like Figures 1-6 As shown, the noise reduction type heating network heater proposed by the present invention includes a shell 1, a head a2 and a head b3 provided at the left and right ends of the shell, and a water outlet pipe 10 and a water inlet pipe 9 provided at the top and bottom of the head a2; it also includes a steam inlet pipe 7, a drain outlet pipe 8, a partition 11, a U-shaped heat exchange tube bundle 14, a baffle a19 and a baffle b20;

[0028] The steam inlet pipe 7 and the drain outlet pipe 8 are respectively arranged on the upper and lower sides of the left end of the shell 1. The steam inlet pipe 7 is used to introduce high-temperature steam, and the drain outlet pipe 8 is used to discharge low-temperature steam and condensed water; the partition 11 is horizontally arranged on the inner wall of the head a2 and is inserted into the shell 1. The partition 11 divides the U-shaped heat exchange tube bundle 14 into upper and lower halves. At the same time, the partition 11 divides the head a2 and the shell 1 into upper and lower parts. A water outlet chamber and a water inlet chamber are formed on the upper and lower sides of the partition 11 in the head a2. The water outlet chamber is connected to the water outlet pipe 10, and the water inlet chamber is connected to the water inlet pipe 9. An upper tube sheet 15 and a lower tube sheet 16 are respectively arranged on the upper and lower sides of the left end of the partition 11. A tube sheet 18 is provided at the turning position of the U-shaped heat exchange tube bundle 14. The tube sheet 18 is connected to the The partition 11 is connected, and the two ends of the U-shaped heat exchange tube bundle 14 pass through the lower tube plate 16 and the upper tube plate 15 respectively to form the water inlet and water outlet; the baffle a19 is set on the partition 11 through the support rod 27, and the baffle b20 is set on the partition 11 and a steam channel is left between the end away from the partition 11 and the interior of the shell 1. A plurality of heat exchange tube through holes 21 are set on the baffle a19 and the baffle b20 for the straight section of the U-shaped heat exchange tube bundle 14 to pass through. The baffles a19 and b20 are alternately arranged on the upper and lower sides of the partition 11. A steam circulation groove 26 is set at the right end of the partition 11. The steam in the upper half of the partition 11 enters the lower half of the partition 11 through the steam circulation groove 26, and a wavy steam route 31 is formed on the upper and lower sides of the partition 11.

[0029] Working Principle: High-temperature steam enters the outer shell 1 through the steam inlet pipe 7. The steam's path is regulated by baffles a19 and b20, forming a wavy steam path 31 within the outer shell 1. Low-temperature water enters the U-shaped heat exchange tube bundle 14 through the water inlet pipe 9. The U-shaped heat exchange tube bundle 14 continuously absorbs the heat from the high-temperature steam, heating the low-temperature water. The heated water is eventually discharged through the water outlet pipe 10, and the low-temperature steam and condensate are discharged through the drain outlet pipe 8.

[0030] In this embodiment, the steam heat exchange path is extended by the partition 11 and the multiple groups of baffles a19 and baffles b20. The tail end of the steam route 31 has a lower temperature and is located outside the low-temperature water, while the head end of the steam route 31 has a higher temperature and is located outside the high-temperature water. Through the arrangement of the steam route 31, the low-temperature water is gradually heated by heat exchange, which helps to reduce the temperature difference between the inside and outside of the U-shaped heat exchange tube bundle 14 throughout the entire section, thereby avoiding the generation of high thermal stress in the U-shaped heat exchange tube bundle 14, reducing damage to the U-shaped heat exchange tube bundle 14, and reducing noise caused by the generation and release of thermal stress.

[0031] Example 2

[0032] like Figure 1As shown, the noise-reducing heating network heater proposed by the present invention, compared to Example 1, has flanges a4 provided on both ends of the housing 1 and on the opposing sections of the heads a2 and b3. Flange connections are formed between the housing 1 and the heads a2, and between the housing 1 and the heads b3, via flanges a4. Multiple support brackets 5 are provided at the bottom of the housing 1, and a pressure relief valve 6 is located in the middle of the bottom of the housing 1.

[0033] like Figure 3 As shown, it further includes a bend head 17 connected to the right side of the tube sheet 18 through the flange b32. The bend section of the U-shaped heat exchange tube bundle 14 is located in the bend head 17. A sealing ring is provided on the inner wall of the head b3, and the sealing ring is in contact with the outer peripheral wall of the flange b32 to achieve a seal.

[0034] In this embodiment, the end caps a2 and b3 are connected to the housing 1 via flange a4, facilitating assembly and disassembly of the end caps a2 and b3. The provision of an elbow end cap 17 to enclose the bent section of the U-shaped heat exchange tube bundle 14 helps prevent heat from radiating toward the end cap b3, thereby reducing heat loss.

[0035] Example 3

[0036] like Figure 2 and Figure 3 As shown, the present invention proposes a noise reduction type heat network heater. Compared with Example 1 or Example 2, the partition 11 includes a heat insulation plate 12 and a heat conducting plate 13 arranged at the bottom of the heat insulation plate 12, the baffle a19 and the baffle b20 are both heat conductors, and sealing strips 30 are provided on the sides of the heat insulation plate 12 and the heat conducting plate 13. The sealing strips 30 are in sealed contact with the inner wall of the shell 1. The setting of the sealing strip 30 can prevent high-temperature steam from directly passing through the gap between the partition 11 and the shell 1 and entering the lower space of the partition 11.

[0037] like Figure 4-Figure 5 As shown, baffles a19, baffle b20, and baffle a19 are sequentially provided on the upper and lower sides of the partition 11 from left to right. A water trough 28 is provided at the bottom of baffle b20 on the partition 11 and baffle a19 below the partition 11. The surfaces of baffle b20 on the partition 11 and baffle a19 below the partition 11 that are impacted by steam are provided with guide slopes 29. Driven by steam, condensed water flows through the guide slopes 29 and gathers toward the water trough 28. The two sets of baffles a19 on the same side of the partition 11 are connected by multiple connecting rods 22. Multiple sets of screws 23 are provided on the set of baffles a19 near the head b3. Multiple limit plates 25 are provided on the right inner wall of the housing 1. The limit plates 25 have through-holes for the screws 23 to pass through. The screws 23 pass through the through-holes and are locked by nuts 24. The baffle b20 placed on the partition 11 is provided with a guide slope 29 and a water channel 28 in order to smoothly drain the condensed water formed on the upper part of the partition 11 to the lower part of the partition 11 at the initial stage of heat exchange.

[0038] In this embodiment, the thermal insulation plate 12 minimizes the impact of the initial high-temperature steam on the U-shaped heat exchange tube bundle 14 in the lower half of the partition 11, preventing the high temperature from directly transmitting through the partition 11 to the baffle b20 at its bottom. This ensures that the temperature in the space below the partition 11 is not excessively high, helping to reduce the temperature difference between the inside and outside of the tubes in the lower half of the U-shaped heat exchange tube bundle 14, thereby reducing thermal stress. The provision of screws 23 and nuts 24 allows for quick fixation, further improving the stability of baffle a19 during the heat exchange process.

[0039] Example 4

[0040] The assembly method based on the above-mentioned embodiment of the noise reduction type heat network heater includes the following steps: S1, inserting the head a2, partition 11, upper tube plate 15, lower tube plate 16, U-shaped heat exchange tube bundle 14, baffle a19, baffle b20, connecting rod 22 and screw 23 into the shell 1 together; S2, adjusting the orientation so that the screw 23 passes through the through hole on the limit plate 25, and then fixing the head a2 through the flange a4, and then locking the screw 23 with the nut 24; S3, fixing the elbow head 17 on the tube plate 18 through the flange b32; S4, fixing the head b3 to the right end of the shell 1 through the flange a4.

[0041] In this embodiment, when the U-shaped heat exchange tube bundle 14 needs to be repaired, the head b3 is first removed, and then the multiple nuts 24 are removed. Then, the flange connection between the head a2 and the shell 1 is opened. The partition 11 and the U-shaped heat exchange tube bundle 14 can be taken out as a whole through the head a2. The disassembly and assembly are simple and convenient, and it is easy to repair or replace the internal structure of the shell 1.

[0042] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto. Various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention.

Claims

1. A noise reduction type heating network heater, comprising a housing (1), a head a (2) and a head b (3) arranged at the left and right ends of the housing, and a water outlet pipe (10) and a water inlet pipe (9) arranged at the top and bottom of the head a (2); characterized in that: It also includes a steam inlet pipe (7), a drain outlet pipe (8), a partition (11), a U-shaped heat exchange tube bundle (14), a baffle a (19) and a baffle b (20); The steam inlet pipe (7) and the drain outlet pipe (8) are respectively arranged on the upper and lower sides of the left end of the shell (1); the partition (11) is horizontally arranged on the inner wall of the head a (2) and inserted into the shell (1); the partition (11) divides the U-shaped heat exchange tube bundle (14) into upper and lower halves; the upper and lower sides of the left end of the partition (11) are respectively provided with an upper tube sheet (15) and a lower tube sheet (16); a tube sheet (18) is provided at the turning position of the U-shaped heat exchange tube bundle (14); the tube sheet (18) is connected to the partition (11); the two ends of the U-shaped heat exchange tube bundle (14) pass through the lower tube sheet (16) and the upper tube sheet (15) respectively. ) forms a water inlet end and a water outlet end; a baffle a (19) is arranged on the partition (11) through a support rod (27); a baffle b (20) is arranged on the partition (11) and a steam passage is left between the end away from the partition (11) and the interior of the shell (1); a plurality of heat exchange tube through holes (21) are provided on both the baffle a (19) and the baffle b (20); the baffle a (19) and the baffle b (20) are alternately arranged on the upper and lower sides of the partition (11); a steam flow groove (26) is provided at the right end of the partition (11); and a wavy steam route (31) is formed on the upper and lower sides of the partition (11); Baffle a (19), baffle b (20) and baffle a (19) are sequentially arranged on the upper and lower sides of the partition (11) from left to right; the two groups of baffles a (19) located on the same side of the partition (11) are connected by multiple connecting rods (22), and multiple groups of screws (23) are arranged on the group of baffles a (19) close to the head b (3). Multiple limiting plates (25) are arranged on the right inner wall of the shell (1), and the limiting plates (25) are provided with through holes for the screws (23) to pass through. The screws (23) pass through the through holes and are locked by nuts (24).

2. The noise reduction type heating network heater according to claim 1, characterized in that: Flanges a (4) are provided on both left and right ends of the shell (1) and on the opposite cross sections of the head a (2) and the head b (3). Flange connections are formed between the shell (1) and the head a (2) and between the shell (1) and the head b (3) via the flanges a (4).

3. The noise reduction type heating network heater according to claim 1, characterized in that: A plurality of support frames (5) are provided at the bottom of the housing (1) for supporting the housing, and a pressure relief valve (6) is provided at the middle position of the bottom of the housing (1).

4. The noise reduction type heating network heater according to claim 1, characterized in that: The partition (11) includes a heat insulating plate (12) and a heat conducting plate (13) arranged at the bottom of the heat insulating plate (12); the baffle a (19) and the baffle b (20) are both heat conductors; sealing strips (30) are arranged on the sides of the heat insulating plate (12) and the heat conducting plate (13); and the sealing strips (30) are used to form a sealed contact with the inner wall of the housing (1).

5. The noise reduction type heating network heater according to claim 1, characterized in that: It also includes a pipe bend seal (17) connected to the right side of the tube sheet (18) through a flange b (32), and the bend section of the U-shaped heat exchange tube bundle (14) is located in the pipe bend seal (17).

6. The noise reduction type heating network heater according to claim 1, characterized in that: The baffle b (20) on the partition (11) and the baffle a (19) below the partition (11) are both provided with a water trough (28) at the bottom, and the baffle b (20) on the partition (11) and the baffle a (19) below the partition (11) are both provided with a guide slope (29) on the surface impacted by steam, and condensed water is gathered toward the water trough (28) through the guide slope (29) under the drive of steam.

Images