Internal circulation heat conduction oil waste heat evaporator

Abstract

The utility model discloses an internal circulation heat conduction oil waste heat evaporator, and relates to the technical field of evaporators. The evaporator comprises a shell and a tube bundle arranged in the shell, a water inlet is formed in the tail of the shell, a water distribution structure is arranged at the position, located below the tube bundle, of the bottom of the shell, and a circulating water outlet is formed in the position, located between the tube bundle and the water inlet, of the bottom of the shell. The circulating water inlet of the water distribution structure is communicated with the circulating water outlet through a pipeline, and a circulating pump is arranged on the pipeline. According to the internal circulation heat conduction oil waste heat evaporator, the heating uniformity can be improved, and therefore the evaporation efficiency is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of evaporators, in particular to an internal circulation heat-conducting oil waste heat evaporator. Background Art

[0002] A thermal oil steam generator is a device that combines a thermal oil boiler with a steam generator. Widely used in industries such as food processing, rubber, printing and dyeing, wood processing, and oil and fat, this device meets the requirements of simultaneously heating water and generating steam with a single thermal oil boiler, saving space and costs.

[0003] like Figure 1 As shown, to extend the contact time between the cold water and the heat exchange tubes, current thermal oil evaporators often have the water inlet and steam outlet arranged diagonally. Specifically, the water inlet is located at the lower end of the housing (the end away from the thermal oil inlet), while the steam outlet is located at the upper end of the housing (the end closest to the thermal oil inlet). While this arrangement can extend the heat exchange time of the cold water, it also suffers from low evaporation efficiency due to localized and uneven heating. Utility Model Content

[0004] In response to the above problems, the present application provides an internal circulation heat transfer oil waste heat evaporator, which can improve the uniformity of heating, thereby effectively improving the evaporation efficiency.

[0005] The technical solution adopted by the utility model to solve its technical problems is:

[0006] An internal circulation heat transfer oil waste heat evaporator comprises a shell and a tube bundle arranged in the shell, a water inlet is provided at the tail of the shell, a water distribution structure is provided at the bottom of the shell below the tube bundle, a circulating water outlet is provided at the bottom of the shell between the tube bundle and the water inlet, the circulating water inlet of the water distribution structure is connected to the circulating water outlet through a pipeline, and a circulating pump is provided on the pipeline.

[0007] Furthermore, the water distribution structure includes a water distribution pipe, and the water distribution pipe is located in the shell. A first branch pipe is provided on the water distribution pipe, and the first branch pipe extends through the side wall of the shell to the outside of the shell. Water distribution ports are evenly arranged on the upper side of the water distribution pipe.

[0008] Furthermore, the water distribution structure includes a water distribution pipe, and the water distribution pipe is located outside the shell. The water distribution pipe is provided with a first branch pipe and several second branches. The first branch pipe is connected to the water outlet of the circulation pump through a pipeline, and the second branch pipe is connected to the internal space of the shell.

[0009] Furthermore, a first weir plate is provided in the shell between the water distribution structure and the circulating water outlet, and the height of the first weir plate is lower than the normal water level of the evaporator.

[0010] Furthermore, a second weir plate is provided in the shell between the first weir plate and the water inlet.

[0011] Furthermore, the height of the second weir plate is the same as that of the first weir plate.

[0012] Furthermore, a first guide plate extending obliquely downward toward the second weir plate is provided at the upper end of the first weir plate, and a second guide plate extending obliquely downward toward the first weir plate is provided at the upper end of the second weir plate.

[0013] Furthermore, a bottom plate is provided between the first guide plate and the second guide plate, and water leakage holes are evenly provided on the bottom plate.

[0014] Furthermore, the suspended end of the first guide plate is provided with a first bent plate extending horizontally toward one side of the second weir plate, and the suspended end of the second guide plate is provided with a second bent plate extending horizontally toward one side of the first weir plate.

[0015] The beneficial effects of the utility model are:

[0016] The internal circulation thermal oil waste heat evaporator provided in the present application utilizes a circulating water pipeline at the bottom of the shell side, which transports water near the water inlet to the bottom of the tube bundle. Water then enters the entire tube bundle evenly and quickly for heat exchange, forming an internal circulation loop. This ensures uniform heating of the low-temperature water entering the shell side, rapidly heating the low-temperature water and improving evaporation efficiency and effectiveness. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of the internal structure of an internal circulation thermal oil waste heat evaporator provided in Example 1;

[0018] Figure 2 for Figure 1 Schematic diagram of the enlarged structure of part A;

[0019] Figure 3 for Figure 1 Schematic diagram of the enlarged structure of part B;

[0020] Figure 4 A schematic structural diagram of the water inlet portion of an internal circulation thermal oil waste heat evaporator provided in Example 2;

[0021] Figure 5 for Figure 4 Schematic diagram of the enlarged structure of part C;

[0022] Figure 6 A schematic structural diagram of the water inlet portion of an internal circulation thermal oil waste heat evaporator provided in Example 3;

[0023] Figure 7 for Figure 6 Schematic diagram of the enlarged structure of part D.

[0024] In the figure: 1, shell; 11, thermal oil inlet; 12, thermal oil outlet; 13, water inlet; 14, steam outlet; 15, circulating water outlet;

[0025] 2. Second partition;

[0026] 3. Discipline;

[0027] 4. Gas-liquid separation device;

[0028] 51, water distribution pipe; 511, first branch pipe; 5111, circulating water inlet; 512, water distribution port; 52, pipeline; 53, circulating pump;

[0029] 6. First weir plate; 61. First guide plate; 62. First curved plate;

[0030] 7. Second weir plate; 71. Second guide plate; 72. Second curved plate;

[0031] 8. Base plate. DETAILED DESCRIPTION

[0032] In order to enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be described in detail below in conjunction with the drawings in the embodiments of this application. The described embodiments are only part of the embodiments of this application, not all of the embodiments. All other embodiments obtained by those skilled in the art without creative work based on the embodiments of this application should fall within the scope of protection of this application.

[0033] Example 1

[0034] like Figure 1As shown, an internal circulation heat transfer oil waste heat evaporator includes a shell 1, and a first partition (not shown in the figure) is provided in the shell 1. The first partition divides the internal space of the shell 1 into two parts along the length direction, namely a heat transfer oil chamber and a heat exchange chamber. A second partition 2 is provided in the heat transfer oil chamber, and the second partition 2 divides the heat transfer oil chamber into an upper and a lower part. The part located on the upper side is the oil inlet chamber, and the part located on the lower side is the oil outlet chamber. A tube bundle 3 composed of a plurality of heat exchange tubes is provided in the heat exchange chamber. The oil inlet and oil outlet of the heat exchange tube are both facing the first partition and are fixedly connected to the first partition in a detachable manner. The oil inlet of the heat exchange tube is connected to the oil inlet chamber after passing through the first partition, and the oil outlet of the heat exchange tube is connected to the oil outlet chamber after passing through the first partition. A thermal oil inlet 11, communicating with the oil inlet chamber, is provided on the upper side of the housing 1 near one end of the thermal oil chamber. A thermal oil outlet 12, communicating with the oil outlet chamber, is provided on the upper side of the housing 1 near one end of the thermal oil chamber. A water inlet 13 is provided on the lower portion of the housing 1, facing away from the thermal oil chamber. The water inlet 13 is communicated with the heat exchange chamber. A steam outlet 14, communicating with the heat exchange chamber, is provided on the upper side of the housing 1. The steam outlet 14 is located near the first partition and contains a gas-liquid separation device 4.

[0035] like Figure 1 As shown, a water distribution structure is provided at the bottom of the shell 1, below the tube bundle 3. The water distribution structure includes a circulating water inlet 5111 and multiple water distribution ports 512, which are evenly arranged below the tube bundle 3. A circulating water outlet 15, communicating with the heat exchange chamber, is provided at the bottom of the shell 1, between the tube bundle 3 and the water inlet 13. The circulating water inlet 5111 of the water distribution structure is connected to the circulating water outlet 15 via a pipeline 52. A circulating pump 53 is provided on the pipeline 52. The circulating pump 53 pumps water from the heat exchange chamber near the water inlet 13 to the bottom of the tube bundle 3. The water is evenly distributed through the water distribution structure, ensuring that the cooler cold water is evenly distributed below the tube bundle 3, ensuring uniform heat exchange.

[0036] As a specific implementation method, Figure 3As shown, the water distribution structure described in this embodiment includes a water distribution pipe 51, and the water distribution pipe 51 is located in the shell 1. The water distribution pipe 51 is provided with a first branch pipe 511 connected to the interior of the water distribution pipe 51, and the first branch pipe 511 extends to the outside of the shell 1 through the side wall of the shell 1. The first branch pipe 511 is fixedly connected to the shell 1 by welding, and the inlet of the first branch pipe 511 is the circulating water inlet 5111. The side wall of the upper half of the water distribution pipe 51 is evenly covered with water distribution ports 512.

[0037] Furthermore, if Figure 1 As shown, a first weir plate 6 is provided within the heat exchange chamber, located between the water distribution structure and the circulating water outlet 15. The height of the first weir plate 6 is lower than the normal water level of the evaporator. Thus, the heated water above the first weir plate 6 overflows through the first weir plate 6 to the side of the first weir plate 6 facing away from the tube bundle 3. It mixes with the cold water entering the shell 1 through the water inlet 13 and is then pumped out by the water pump. It then enters the bottom of the shell through the circulating water inlet 5111 and finally, through the water distribution outlet 512 on the water distribution pipe 51, evenly and quickly enters the entire tube bundle 3 for heat exchange, forming an internal loop. The provision of the first weir plate 6 allows for mixing and preheating of the cold water entering the shell 1, thereby improving the evaporation efficiency of the evaporator.

[0038] As a specific implementation, in this embodiment, the height of the first weir plate 6 is 10 mm to 30 mm lower than the normal water level.

[0039] Furthermore, if Figure 2 As shown, a second weir plate 7 is provided in the heat exchange chamber between the first weir plate 6 and the water inlet 13. As cold water is continuously injected from the water inlet 13, the water level between the second weir plate 7 and the rear end of the shell 1 will continue to rise, and eventually overflow over the second weir plate 7 to the area between the first weir plate 6 and the second weir plate 7, where it mixes with the hot water that has overflowed between the first weir plate 6 and the second weir plate 7, and is then pumped to the water distribution structure by the circulation pump 53.

[0040] By providing the second weir plate 7, the cold water and the hot water can be pre-mixed, thereby improving the uniformity of the mixed water temperature and further ensuring uniform heating.

[0041] As a specific implementation, in this embodiment, the height of the second weir plate 7 is the same as the height of the first weir plate 6 .

[0042] Furthermore, in order to further improve the uniformity of mixing of cold water and hot water, as Figure 2As shown, a first guide plate 61 extending obliquely downward toward the second weir plate 7 is provided at the upper end of the first weir plate 6, and a second guide plate 71 extending obliquely downward toward the first weir plate 6 is provided at the upper end of the second weir plate 7. A bottom plate 8 is provided between the first guide plate 61 and the second guide plate 71. One end of the bottom plate 8 is connected to the suspended end of the first guide plate 61, and the other end of the bottom plate 8 is connected to the suspended end of the second guide plate 71. The bottom plate 8 is evenly distributed with water leakage holes.

[0043] Example 2

[0044] like Figure 4 and Figure 5 As shown, the bottom plate 8 is removed. The free end of the first guide plate 61 is provided with a first curved plate 62 extending horizontally toward the second weir plate 7. The free end of the second guide plate 71 is provided with a second curved plate 72 extending horizontally toward the first weir plate 6. The first curved plate 62 and the second curved plate 72 guide the hot water flowing from the first guide plate 61 and the cold water flowing from the second guide plate 71 to collide, achieving uniform mixing. The remaining structure is the same as in Example 1.

[0045] Example 3

[0046] like Figure 6 and Figure 7 As shown, the bottom plate 8 is removed, and the distance M between the free ends of the first guide plate 61 and the free ends of the second guide plate 71 is less than 20 mm. As a specific embodiment, the distance M between the free ends of the first guide plate 61 and the free ends of the second guide plate 71 in this embodiment is 10 mm to 20 mm. The remaining structure is the same as in Example 1.

[0047] Example 4

[0048] The water distribution pipe 51 is located outside the shell 1. The water distribution pipe 51 is provided with a first branch pipe 511 connected to the interior of the water distribution pipe 51, and the inlet of the first branch pipe 511 is the circulating water inlet 5111. A plurality of second branch pipes are evenly distributed along the length direction on the side of the water distribution pipe 51 facing the shell 1, and the second branch pipes extend inwardly through the side wall of the shell 1 to the interior of the shell 1, and the outlet of the second branch pipe is the water distribution port 512. The second branch pipe is fixedly connected to the shell 1 by welding. The rest of the structure is the same as that of Example 1.

[0049] Example 5

[0050] The bottom of the shell 1 is uniformly distributed along the length of the tube bundle 3, with several water distribution pipes 51 disposed therein. The inner ends of these water distribution pipes 51 communicate with the heat exchange chamber, forming the water distribution ports 512. The outer ends of these water distribution pipes 51 are flanged and connected to the corresponding second branch pipes via flange connections. The remaining structure is the same as in Example 1.

[0051] Other embodiments obtained by those skilled in the art by combining, splitting, reorganizing, etc. the embodiments provided in this application do not exceed the scope of protection of this application.

[0052] The above specific implementation methods provide a detailed description of the purpose, technical solutions and beneficial effects of the embodiments of the present application. The above is only a specific implementation method of the embodiments of the present application and is not intended to limit the scope of protection of the embodiments of the present application. That is, any modifications, equivalent replacements, improvements, etc. made on the basis of the embodiments of the present application should be included in the scope of protection of the embodiments of the present application.

Claims

1. An internal circulation heat transfer oil waste heat evaporator, comprising a shell (1) and a tube bundle (3) arranged in the shell (1), wherein a water inlet (13) is provided at the rear of the shell (1), and characterized in that: The bottom of the shell (1) is located below the tube bundle (3) and is provided with a water distribution structure. The bottom of the shell (1) is located between the tube bundle (3) and the water inlet (13) and is provided with a circulating water outlet (15). The circulating water inlet (5111) of the water distribution structure is connected to the circulating water outlet (15) through a pipeline (52), and a circulating pump (53) is provided on the pipeline (52).

2. The internal circulation heat transfer oil waste heat evaporator according to claim 1, characterized in that: The water distribution structure includes a water distribution pipe (51), and the water distribution pipe (51) is located in the shell (1). A first branch pipe (511) is provided on the water distribution pipe (51), and the first branch pipe (511) passes through the side wall of the shell (1) and extends to the outside of the shell (1). Water distribution ports (512) are evenly arranged on the upper side of the water distribution pipe (51).

3. The internal circulation heat transfer oil waste heat evaporator according to claim 1, characterized in that: The water distribution structure includes a water distribution pipe (51), and the water distribution pipe (51) is located outside the shell (1). A first branch pipe (511) and a plurality of second branch pipes are provided on the water distribution pipe (51). The first branch pipe (511) is connected to the water outlet of the circulation pump (53) through the pipeline (52), and the second branch pipe is connected to the internal space of the shell (1).

4. The internal circulation thermal oil waste heat evaporator according to claim 1, characterized in that: A first weir plate (6) is provided in the shell (1) between the water distribution structure and the circulating water outlet (15), and the height of the first weir plate (6) is lower than the normal water level of the evaporator.

5. The internal circulation heat transfer oil waste heat evaporator according to claim 4, characterized in that: A second weir plate (7) is provided in the housing (1) between the first weir plate (6) and the water inlet (13).

6. The internal circulation heat transfer oil waste heat evaporator according to claim 5, characterized in that: The height of the second weir plate (7) is the same as that of the first weir plate (6).

7. The internal circulation heat transfer oil waste heat evaporator according to claim 5, characterized in that: The upper end of the first weir plate (6) is provided with a first guide plate (61) extending obliquely downward toward the second weir plate (7), and the upper end of the second weir plate (7) is provided with a second guide plate (71) extending obliquely downward toward the first weir plate (6).

8. The internal circulation heat transfer oil waste heat evaporator according to claim 7, characterized in that: A bottom plate (8) is provided between the first guide plate (61) and the second guide plate (71), and water leakage holes are evenly provided on the bottom plate (8).

9. The internal circulation heat transfer oil waste heat evaporator according to claim 7, characterized in that: The suspended end of the first guide plate (61) is provided with a first bent plate (62) extending horizontally toward one side of the second weir plate (7), and the suspended end of the second guide plate (71) is provided with a second bent plate (72) extending horizontally toward one side of the first weir plate (6).

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