Backwater buffer structure and steam heat exchanger

Abstract

The utility model provides a backwater buffer structure and a steam heat exchanger, which belong to the technical field of heat exchangers and comprise a heat exchanger main body, a steam inlet pipe, a buffer component and a water return pipe. The heat exchanger body is provided with a heat exchange inlet pipe and a heat exchange calandria. The steam inlet pipe is communicated with the heat exchange inlet pipe, and an air inlet pump is arranged on the steam inlet pipe; the buffer assembly comprises a buffer pipe and a buffer tank, one end of the buffer pipe communicates with the heat exchange calandria, a buffer pump which is always opened is arranged on the buffer pipe, and the other end of the buffer pipe penetrates into the buffer tank from top to bottom; one end of the water return pipe is connected to the side wall of the buffer tank, and the water return pipe section is provided with a reflux pump which is intermittently started. According to the backwater buffering structure, the reflux pump is intermittently started, condensate water in the backwater pipe can be intermittently discharged, the inner cavity of the backwater pipe is always filled with the condensate water in the discharging process, vibration of the backwater pipe is reduced, and noise is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of heat exchangers, and more specifically, relates to a return water buffer structure and a steam heat exchanger. Background Art

[0002] A steam heat exchanger is a device that uses steam as a heat source to transfer heat to water or air for heating or drying processes. Steam heat exchangers are widely used in modern industry and have high thermal efficiency and reliability.

[0003] After the high-temperature steam passes through the heat exchanger, most of the steam will condense into condensed water and flow into the water tank through the return pipe. The condensed water in the return pipe is condensed from the high-temperature steam. The condensed water cannot completely fill the return pipe. If the return pipe is kept returning water continuously, the water circulation pump on the return pipe will intermittently idle, causing the return pipe to vibrate and the noise to be relatively loud. Utility Model Content

[0004] The purpose of the utility model is to provide a water return buffer structure, aiming to solve the problem that the water return pipe vibrates and makes relatively loud noise.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is to provide a water return buffer structure, comprising:

[0006] A heat exchanger body, the heat exchanger body comprising a heat exchange inlet pipe and a heat exchange exhaust pipe;

[0007] a steam inlet pipe, the steam inlet pipe being connected to the heat exchange inlet pipe and being provided with an air intake pump;

[0008] A buffer assembly, comprising a buffer tube and a buffer tank, one end of the buffer tube being connected to the heat exchange exhaust pipe, a buffer pump being always on being provided on the buffer tube, and the other end of the buffer tube penetrating from top to bottom into the interior of the buffer tank;

[0009] A return water pipe, one end of which is connected to the side wall of the buffer tank, and an intermittently opened reflux pump is provided on the return water pipe.

[0010] In a possible implementation, temperature sensors are provided on both the steam inlet pipe and the buffer pipe.

[0011] In one possible implementation, there are two buffer tubes, one end of the two buffer tubes is connected in parallel to the heat exchange exhaust pipe, and the other end of the two buffer tubes penetrates into the buffer tank from top to bottom, and the two buffer pumps are installed on the two buffer tubes respectively.

[0012] In a possible implementation, an insulation layer is provided on the inner wall of the buffer tank.

[0013] In a possible implementation, the length of the buffer tube penetrating into the buffer tank is not less than half the depth of the inner cavity of the buffer tank.

[0014] In a possible implementation, two switching pipelines are provided in parallel on a side of the return pipe close to the buffer tank, and the two reflux pumps are respectively provided on the two switching pipelines.

[0015] In a possible implementation, two opening and closing valves are provided on the return water pipe, and the two opening and closing valves are respectively provided on both sides of the switching pipeline.

[0016] In a possible implementation, vibration damping tubes are respectively provided on both sides of the reflux pump, and the vibration damping tubes reduce vibration through axial and radial deformation.

[0017] In a possible implementation, the vibration damping tube includes a flexible outer sleeve and an inner bellows, wherein the flexible outer sleeve is sleeved on the outer circumference of the inner bellows, the flexible outer sleeve has radial deformation, and the inner bellows has axial deformation.

[0018] The return water buffer structure provided by this utility model has the following advantages: compared with the prior art, the intake pump provides power for high-temperature steam, which enters the heat exchanger body through the steam intake pipe and the heat exchange inlet pipe. After heat transfer, the high-temperature steam turns into condensed water. The buffer pump provides power for the condensed water, which then enters the buffer tank through the heat exchanger exhaust pipe and the buffer pipe. The condensed water is stored in the buffer tank until the condensed water in the buffer tank reaches a certain amount (generally more than half of the total capacity of the buffer tank). The return pump is then activated to provide power for the condensed water and discharge it through the return pipe, allowing the condensed water in the return pipe to completely fill the inner cavity of the return pipe. When the condensed water in the buffer tank falls below the top of the buffer pipe inlet, the return pump is turned off and the above process is repeated. The intermittent activation of the return pump allows the condensed water in the return pipe to be discharged intermittently, ensuring that the condensed water always fills the inner cavity of the return pipe during discharge, reducing vibration and noise in the return pipe.

[0019] The utility model also provides a steam heat exchanger, comprising the aforementioned return water buffer structure.

[0020] The steam heat exchanger provided by the present invention has the beneficial effect of using the above-mentioned return water buffer structure compared with the prior art, and thus has the same beneficial effect as the return water buffer structure, which will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 A schematic structural diagram of a water return buffer structure provided by an embodiment of the present utility model;

[0023] Figure 2 A schematic structural diagram of a buffer tank provided in an embodiment of the present utility model;

[0024] Figure 3 for Figure 1 A partial enlarged view of the M point in the middle.

[0025] Description of reference numerals:

[0026] 1. Heat exchanger body; 2. Heat exchange inlet pipe; 3. Heat exchange exhaust pipe; 4. Steam inlet pipe; 5. Air intake pump; 6. Buffer pipe; 7. Buffer tank; 8. Buffer pump; 9. Return pipe; 10. Reflux pump; 11. Temperature sensor; 12. Insulation layer; 13. Switching pipeline; 14. Opening and closing valve; 15. Vibration damping pipe; 16. Flexible outer sleeve; 17. Inner bellows. DETAILED DESCRIPTION

[0027] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0028] Unless otherwise explicitly defined, the use of terms such as "first," "second," or "third," etc., are intended to distinguish different objects rather than to describe a specific order.

[0029] Unless otherwise expressly defined, directional words such as the terms "center", "lateral", "longitudinal", "horizontal", "vertical", "top", "bottom", "inside", "outside", "up", "down", "front", "back", "left", "right", "clockwise", "counterclockwise", "high", "low" and the like indicating directions or positional relationships are based on the directions and positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, so they cannot be understood as limiting the specific scope of protection of the present invention.

[0030] See also Figure 1The return water buffer structure provided by the present invention is now described. The return water buffer structure includes a heat exchanger body 1, a steam inlet pipe 4, a buffer assembly and a return water pipe 9.

[0031] The heat exchanger body 1 is equipped with a heat exchange inlet pipe 2 and a heat exchange exhaust pipe 3; the steam inlet pipe 4 is connected to the heat exchange inlet pipe 2, and an air intake pump 5 is provided on the steam inlet pipe 4; the buffer assembly includes a buffer pipe 6 and a buffer tank 7, one end of the buffer pipe 6 is connected to the heat exchange exhaust pipe 3, and a buffer pump 8 that is always open is provided on the buffer pipe 6, and the other end of the buffer pipe 6 penetrates into the buffer tank 7 from top to bottom; one end of the return pipe 9 is connected to the side wall of the buffer tank 7, and an intermittently open reflux pump 10 is provided on the return pipe 9.

[0032] The present invention provides a return water buffer structure that, compared to existing technologies, features an intake pump 5 that provides power for high-temperature steam, which enters the heat exchanger body 1 through the steam intake pipe 4 and the heat exchange inlet pipe 2. After heat transfer, the high-temperature steam turns into condensed water. A buffer pump 8 provides power for the condensed water, which then flows through the heat exchange exhaust pipe 3 and the buffer pipe 6 and enters the buffer tank 7. The condensed water is stored in the buffer tank 7 until it reaches a certain volume (generally exceeding half of the total volume of the buffer tank 7). The return pump 10 is then activated to provide power for the condensed water and discharge it through the return pipe 9, allowing the condensed water in the return pipe 9 to completely fill the inner cavity of the return pipe 9. When the condensed water in the buffer tank 7 falls below the inlet top of the buffer pipe 6, the return pump 10 is turned off, and the above process is repeated. The intermittent activation of the return pump 10 allows the condensed water in the return pipe 9 to be discharged intermittently, ensuring that the condensed water always fills the inner cavity of the return pipe 9 during discharge, reducing vibration and noise in the return pipe 9.

[0033] Temperature sensors 11 are provided on both the steam inlet pipe 4 and the buffer pipe 6. The temperature sensor 11 on the steam inlet pipe 4 is used to monitor the temperature of the high-temperature steam, and the temperature sensor 11 on the buffer pipe 6 is used to monitor the temperature of the condensed water.

[0034] See also Figure 1 There are two buffer tubes 6 , one end of which is connected in parallel to the heat exchanger exhaust pipe 3 , and the other end of which penetrates the interior of the buffer tank 7 from top to bottom. Two buffer pumps 8 are installed on each of the two buffer tubes 6 , one for each. Both buffer tubes 6 can simultaneously transfer condensate to the buffer tank 7 , or one of them can be used independently, facilitating maintenance of each buffer tube 6 .

[0035] See also Figure 2 The inner wall of the buffer tank 7 is provided with an insulation layer 12, which is used to enhance the insulation effect of the buffer tank 7 so that the condensed water can maintain a certain temperature, and this part of the waste heat can be reused when discharged.

[0036] Specifically, the length of the buffer tube 6 inserted into the buffer tank 7 is not less than half the depth of the inner cavity of the buffer tank 7. In this arrangement, the lower end of the buffer tube 6 is at a sufficient height from the bottom of the inner cavity of the buffer tank 7, reducing the impact of condensed water when it first enters the buffer tank 7, thereby reducing vibration and noise of the buffer tank 7.

[0037] Among them, two switching pipes 13 are arranged in parallel on the side of the return pipe 9 close to the buffer tank 7, and the two reflux pumps 10 are respectively arranged on the two switching pipes 13. Condensate can be provided to the return pipe 9 through the two switching pipes 13 at the same time. The two switching pipes 13 can also provide condensate to the return pipe 9 through the corresponding reflux pumps 10 separately, which is convenient for the separate maintenance of any switching pipe 13.

[0038] In addition, the return pipe 9 is equipped with two on-off valves 14, one on each side of the switching line 13. Under normal operating conditions, the two on-off valves 14 are normally open. When it is necessary to inspect the return pipe 9 or the switching line 13, or the corresponding accessories on the return pipe 9 and the switching line 13, the two on-off valves 14 can be selectively closed.

[0039] See also Figure 3 A vibration damping tube 15 is provided on both sides of the reflux pump 10, and the vibration damping tube 15 reduces vibration by axial and radial deformation.

[0040] Specifically, the vibration damping tube 15 comprises a flexible outer tube 16 and an inner bellows 17. The flexible outer tube 16 is fitted around the outer periphery of the inner bellows 17 and is capable of radial deformation, while the inner bellows 17 is capable of axial deformation. The flexible outer tube 16 is a rubber outer tube with a smooth outer wall, which allows radial deformation under vibration. The inner bellows 17 is a rubber inner tube with a folded outer wall, which allows axial extension or contraction under vibration. Both the outer and inner rubber tubes are made of rubber or polyvinyl chloride.

[0041] The steam heat exchanger provided by the present invention uses the above-mentioned return water buffer structure, and therefore has the same beneficial effects as the return water buffer structure, which will not be described in detail here.

[0042] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements and improvements 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 backwater buffer structure, characterized in that: include: A heat exchanger body (1), wherein the heat exchanger body (1) is provided with a heat exchange inlet pipe (2) and a heat exchange exhaust pipe (3); a steam inlet pipe (4), the steam inlet pipe (4) being connected to the heat exchange inlet pipe (2), and an air intake pump (5) being provided on the steam inlet pipe (4); A buffer assembly, the buffer assembly comprising a buffer tube (6) and a buffer tank (7), one end of the buffer tube (6) being connected to the heat exchange exhaust pipe (3), the buffer tube (6) being provided with a buffer pump (8) which is always turned on, and the other end of the buffer tube (6) penetrating from top to bottom into the interior of the buffer tank (7); A return water pipe (9), one end of which is connected to the side wall of the buffer tank (7), and an intermittently opened reflux pump (10) is provided on the return water pipe (9).

2. A backwater buffer structure according to claim 1, characterized in that: The steam inlet pipe (4) and the buffer pipe (6) are both provided with temperature sensors (11).

3. A backwater buffer structure according to claim 1, characterized in that: There are two buffer tubes (6), one end of each of the two buffer tubes (6) is connected in parallel to the heat exchange exhaust pipe (3), and the other end of each of the two buffer tubes (6) penetrates into the interior of the buffer tank (7) from top to bottom. The two buffer pumps (8) are respectively installed on the two buffer tubes (6) in a one-to-one correspondence.

4. A backwater buffer structure according to claim 1, characterized in that: The inner wall of the buffer tank (7) is provided with a heat-insulating layer (12).

5. The backwater buffer structure according to claim 1, characterized in that: The length of the buffer tube (6) penetrating into the buffer tank (7) is not less than half the depth of the inner cavity of the buffer tank (7).

6. The backwater buffer structure according to claim 1, characterized in that: Two switching pipelines (13) are arranged in parallel on one side of the return pipe (9) close to the buffer tank (7), and the two reflux pumps (10) are respectively arranged on the two switching pipelines (13).

7. A backwater buffer structure according to claim 6, characterized in that: The return water pipe (9) is provided with two opening and closing valves (14), and the two opening and closing valves (14) are respectively provided on both sides of the switching pipeline (13).

8. The backwater buffer structure according to claim 6, characterized in that: Vibration damping tubes (15) are respectively provided on both sides of the reflux pump (10), and the vibration damping tubes (15) reduce vibration through axial and radial deformation.

9. The backwater buffer structure according to claim 8, characterized in that: The vibration damping tube (15) comprises a flexible outer sleeve (16) and an inner bellows (17). The flexible outer sleeve (16) is sleeved on the outer circumference of the inner bellows (17). The flexible outer sleeve (16) has radial deformation, and the inner bellows (17) has axial deformation.

10. A steam heat exchanger, characterized in that: It comprises a backwater buffer structure as described in any one of claims 1-9.

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