Rear water-cooled wall type tube bundle

Abstract

The utility model relates to a rear water-cooled wall type tube bundle which comprises a shell, a hollow first-stage gas-liquid separation device and a hollow second-stage gas-liquid separation device. The first-stage gas-liquid separation device is installed in an inner cavity of the shell, the first-stage gas-liquid separation device comprises a first filter plate and a first exhaust pipe, the first filter plate is installed on the inward side of the first-stage gas-liquid separation device, the first exhaust pipe is fixed to the outer side of an outer shell of the shell, and the first exhaust pipe is communicated with the inner cavity of the first-stage gas-liquid separation device; the second-stage gas-liquid separation device is installed in an inner cavity of the shell and comprises a second filter plate and a second exhaust pipe, the second filter plate serves as a shell of the second-stage gas-liquid separation device, the second exhaust pipe is fixed to the outer side of the shell, the second exhaust pipe is communicated with the inner cavity of the second-stage gas-liquid separation device, and the second filter plate serves as the outer shell of the second-stage gas-liquid separation device. The device has the advantage that the pressure in the shell is reduced through two-stage liquid-gas separation.

Description

Technical Field

[0001] The utility model relates to the field of heat exchange tube bundles, in particular to a rear water-cooled wall type tube bundle. Background Art

[0002] The heat exchange tube bundle is composed of many long and thin tubes, which can cool or heat materials through heat exchange. The tubes are usually made of metal, which has good thermal conductivity and corrosion resistance. When two fluids of different temperatures flow through the inside and outside of the heat exchange tube bundle, heat will be transferred from the hot fluid to the cold fluid, completing the heat conversion.

[0003] At present, the patent CN103575155A discloses a heat exchanger tube bundle, including multiple heat transfer tubes, fixed tube sheets and floating head tube sheets, one end of the heat transfer tube is arranged on the fixed tube sheet, and the other end of the heat transfer tube is connected to the floating head tube sheet, the floating head tube sheet is equipped with a hook ring and a butterfly cover, the hook ring and the butterfly cover are connected by a flange, and also includes multiple arched upper baffles and lower baffles, the upper baffles and lower baffles are arranged on multiple heat transfer tubes at intervals, and the center angle of the upper baffles and the lower baffles is 125°. In the process of heat exchange, hot fluid is injected into the heat transfer tube, and cold fluid is injected into the shell. When the cold fluid is heated, the cold fluid is partially vaporized and dissolved in the cold fluid gas, which will overflow, resulting in an increase in the internal pressure of the shell. In severe cases, the shell may even be deformed, affecting its service life.

[0004] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present disclosure, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Utility Model Content

[0005] Aiming at the deficiencies of the prior art, the utility model discloses a rear water-cooled wall tube bundle.

[0006] The technical solution adopted by the utility model is as follows:

[0007] A rear water-cooled wall tube bundle comprises a shell, a hollow primary gas-liquid separation device and a hollow secondary gas-liquid separation device; the primary gas-liquid separation device is installed in the inner cavity of the shell, the primary gas-liquid separation device comprises a filter plate 1 and an exhaust pipe 1, the filter plate 1 is installed on the inner side of the primary gas-liquid separation device, the exhaust pipe 1 is fixed on the outer side of the shell shell, and the exhaust pipe 1 is communicated with the inner cavity of the primary gas-liquid separation device; the secondary gas-liquid separation device is installed in the inner cavity of the shell, the secondary gas-liquid separation device comprises a filter plate 2 and an exhaust pipe 2, the filter plate 2 serves as the outer shell of the secondary gas-liquid separation device, the exhaust pipe 2 is fixed on the outer side of the shell shell, and the exhaust pipe 2 is communicated with the inner cavity of the secondary gas-liquid separation device.

[0008] Furthermore, the outer shape of the filter plate 1 is set to be arc-shaped, and the curvature of the filter plate 1 is the same as the curvature of the shell.

[0009] Furthermore, the number of the filter plates 2 is two, and the two filter plates 2 are symmetrically arranged with respect to a perpendicular bisector of the width direction of the shell.

[0010] Furthermore, one side of the filter plate 2 is welded to the shell, and the other side of the filter plate 2 is welded and fixed to another filter plate 2, and the combined cross-section of the two filter plates 2 is an inverted triangle.

[0011] Furthermore, a down pipe is provided at the bottom of the shell.

[0012] Furthermore, the number of the downcomers is two, and the two downcomers are symmetrically arranged with respect to a perpendicular bisector of the width direction of the shell.

[0013] Furthermore, a horizontally arranged liquid level tube is connected to one side of the shell.

[0014] Furthermore, the two liquid level tubes are provided as a group, and the two liquid level tubes are arranged symmetrically with respect to a horizontal bisector of the shell.

[0015] Furthermore, the tail end of the liquid level tube is located in the inner cavity of the shell, and a connecting tube is connected between the tail ends of the two liquid level tubes.

[0016] Furthermore, both ends of the connecting pipe extend outward and the ends are configured to be open.

[0017] The beneficial effects of the utility model are as follows:

[0018] 1. When the cold fluid in the shell is heated and partially vaporized and dissolved in the cold fluid, the gas will overflow. The generated gas will first pass through a primary gas-liquid separation device during the rising process and the cold fluid during the flow process. The gas can pass through filter plate one and be discharged from exhaust pipe one. After that, the gas passes through a primary gas-liquid separation device and is discharged from exhaust pipe two through filter plate one, avoiding excessive pressure inside the shell, causing deformation and other unexpected situations, and improving the service life of the equipment.

[0019] 2. The shape of the filter plate 1 is set to be arc-shaped, which increases the contact area between the filter plate 1 and the gas, which is conducive to more gases to complete gas-liquid separation.

[0020] 3. The combined cross-section of the filter plate 2 is an inverted triangle. Since the space at the top of the inner cavity of the shell is limited, the contact area between the filter plate 1 and the gas is increased without excessively occupying space, thereby promoting gas-liquid separation.

[0021] 4. Since the flow rate of the cold fluid is relatively fast, and the cold fluid collides with the tube bundle, causing turbulence in the flow field, the laminar flow is destroyed, and there is not only sliding but also mixing between adjacent flow layers, forming turbulence. When the cold fluid flows through the downcomer, part of the liquid is discharged, which will definitely reduce the flow rate of the liquid, and comb the flow direction of the cold fluid at the bottom to reduce turbulence.

[0022] 5. When the liquid level in the shell cavity is too high, excess cold fluid can be discharged from the liquid level pipe. When the liquid level in the shell cavity is too low, liquid can be replenished through the liquid level pipe to ensure that the liquid in the shell is in an appropriate storage range. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the front view structure of a rear water-cooled wall tube bundle.

[0024] Figure 2 It is a schematic diagram of the cross-sectional structure of a rear water-cooled wall tube bundle.

[0025] In the figure: 1. shell; 11. heat exchange tube bundle; 2. primary gas-liquid separation device; 21. filter plate 1; 22. exhaust pipe 1; 3. secondary gas-liquid separation device; 31. filter plate 2; 32. exhaust pipe 2; 4. downcomer; 5. liquid level pipe; 51. connecting pipe. DETAILED DESCRIPTION

[0026] The specific implementation of the present utility model is described below in conjunction with the accompanying drawings.

[0027] In order to make the purpose, technical scheme and advantages of the utility model clearer, the device proposed in the utility model is further described in detail below in combination with the accompanying drawings and specific implementation methods. According to the following description, the advantages and features of the utility model will be clearer. It should be noted that the accompanying drawings adopt a very simplified form and use non-precise proportions, which are only used to conveniently and clearly assist in explaining the purpose of the implementation method of the utility model. In order to make the purpose, features and advantages of the utility model more obvious and easy to understand, please refer to the accompanying drawings. It should be noted that the structure, proportion, size, etc. illustrated by the accompanying drawings of this specification are only used to match the content disclosed in the specification, so that people familiar with this technology can understand and read, and are not used to limit the limiting conditions for the implementation of the utility model, so it has no technical substantive significance. Any modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the effect that the utility model can produce and the purpose that can be achieved, should still fall within the scope of the technical content disclosed by the utility model.

[0028] Example:

[0029] A rear water-cooled wall tube bundle, such as Figure 1As shown, it includes a shell 1, a primary gas-liquid separation device 2 and a hollow secondary gas-liquid separation device 3. The primary gas-liquid separation device 2 and the secondary gas-liquid separation device 3 are installed in the inner cavity of the shell 1, and the exhaust structures of the primary gas-liquid separation device 2 and the secondary gas-liquid separation device 3 are arranged outside the shell 1.

[0030] like Figure 1 and Figure 2 As shown, a downcomer 4 is provided at the bottom of the shell 1, and the number of the downcomers 4 is set to an even number, two downcomers 4 form a group, and the two downcomers 4 are symmetrically arranged with respect to the vertical bisecting plane in the width direction of the shell 1, and the downcomers 4 are inclined outward. When the cold fluid flows through the downcomer 4, part of the liquid of the cold fluid is discharged from the downcomer 4, completing partial diversion, which will definitely reduce the flow velocity of the liquid, and comb the flow direction of the cold fluid at the bottom to reduce turbulence.

[0031] like Figure 1 and Figure 2 As shown, a heat exchange tube bundle 11 is installed in the inner cavity of the shell 1, and the heat exchange tube bundle 11 is arranged on the central axis of the shell 1. A hot fluid is passed into the heat exchange tube bundle 11, and the hot fluid can be a high-temperature gas or liquid. A cold fluid is passed into the inner cavity of the shell 1, and the cold fluid can be cold water. The cold fluid contacts the heat exchange tube bundle 11 to complete the heat exchange process.

[0032] like Figure 2 As shown, the primary gas-liquid separation device 2 includes a filter plate 21 and an exhaust pipe 22.

[0033] The filter plate 1 is installed on the inner side of the primary gas-liquid separation device 2, and a cavity for temporarily storing gas is formed between the filter plate 1 and the inner wall of the housing 1. The shape of the filter plate 1 21 is set to be arc-shaped, and the curvature of the filter plate 1 21 is consistent with the curvature of the housing 1, in order to increase the contact area between the filter plate 1 21 and the cold water.

[0034] The exhaust pipe 22 is installed on the outside of the shell 1, and the exhaust pipe 22, the filter plate 1 and the inner wall of the shell 1 form a cavity to communicate with each other. When working, the gas can pass through the filter plate 21 to complete the first liquid-gas diversion, and then the gas is discharged from the exhaust pipe 22.

[0035] like Figure 2 As shown, the secondary gas-liquid separation device 3 includes a second filter plate 31 and a second exhaust pipe 32 .

[0036] The filter plate 2 31 serves as the outer shell of the secondary gas-liquid separation device 3. The two filter plates 2 31 are arranged symmetrically with respect to the perpendicular bisecting plane in the width direction of the housing 1. The filter plates 2 31 are arranged obliquely, one side of the filter plate 2 31 is welded to the housing 1, and the other side of the filter plate 2 31 is welded and fixed to another filter plate 2 31. The combined cross section of the two filter plates 2 31 is an inverted triangle. Since the space at the top of the inner cavity of the housing 1 is limited, the filter plate 2 31 is provided with the above-mentioned shape in order to further increase the contact area and improve the liquid-gas separation efficiency.

[0037] The second exhaust pipe 32 is installed on the top of the housing 1, and the second exhaust pipe 32 is connected to the cavity surrounded by the second filter plate 31 and the housing 1. The separated gas is discharged through the second exhaust pipe 32.

[0038] like Figure 2 As shown, a horizontally arranged liquid level tube 5 is connected to one side of the shell 1, and every two liquid level tubes 5 are set as a group. The two liquid level tubes 5 are symmetrically arranged about the horizontal bisecting plane of the shell 1, one liquid level tube 5 is close to the top of the shell 1, and the other liquid level tube 5 is close to the bottom of the shell 1. The tail end of the liquid level tube 5 goes deep into the inner cavity of the shell 1, and a connecting pipe 51 is connected between the tail ends of the two liquid level tubes 5. The connecting pipe 51 is arranged in the vertical direction, and the head and tail ends of the connecting pipe 51 extend outward and the ends are set as openings to facilitate the passage of liquid. When the liquid level in the inner cavity of the shell 1 is too high, excess cold fluid can flow in from the top of the connecting pipe 51 and then be discharged through the liquid level tube 5; when the liquid level in the inner cavity of the shell 1 is too low, an external water source can be used to replenish liquid through the liquid level tube 5 to ensure that the liquid in the shell 1 is in a suitable storage range, so as to avoid the situation where the water level in the shell 1 is too low or too high and affects the heat exchange.

[0039] Specific working process:

[0040] The hot fluid to be exchanged is injected into the heat exchange tube bundle 11, and the hot fluid flows along the heat exchange tube bundle 11. Cold water is passed into the shell 1, and the cold water contacts the outer wall of the heat exchange tube bundle 11. During the heat exchange process, the heated cold water is partially vaporized and the air dissolved in the cold water will overflow. The gas first passes through the primary gas-liquid separation device 2 during the rising process and the cold water during the flowing process, and the first liquid-gas separation is performed through the filter plate 1 21. After that, the gas is discharged from the exhaust pipe 1 22. Part of the gas continues to rise. When the gas flows to the top of the shell 1, the gas passes through the filter plate 2 31 to strip off the small water droplets in the mixed gas, and the dry gas is discharged from the exhaust pipe 2 32, which reduces the pressure inside the shell 1 and increases the service life of the equipment.

[0041] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0042] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A rear water-cooled wall tube bundle, characterized in that: It includes a shell, a hollow primary gas-liquid separation device and a hollow secondary gas-liquid separation device; The primary gas-liquid separation device is installed in the inner cavity of the shell, and the primary gas-liquid separation device includes a filter plate 1 and an exhaust pipe 1. The filter plate 1 is installed on the inner side of the primary gas-liquid separation device, and the exhaust pipe 1 is fixed on the outer side of the shell, and the exhaust pipe 1 is connected to the inner cavity of the primary gas-liquid separation device; The secondary gas-liquid separation device is installed in the inner cavity of the shell, and the secondary gas-liquid separation device includes a second filter plate and a second exhaust pipe. The second filter plate serves as the outer shell of the secondary gas-liquid separation device, and the second exhaust pipe is fixed on the outside of the shell. The second exhaust pipe is connected to the inner cavity of the secondary gas-liquid separation device.

2. The rear water-cooled wall tube bundle according to claim 1, characterized in that: The outer shape of the filter plate 1 is set to be arc-shaped, and the curvature of the filter plate 1 is the same as the curvature of the shell.

3. The rear water-cooled wall tube bundle according to claim 1, characterized in that: The number of the filter plates 2 is two, and the two filter plates 2 are symmetrically arranged with respect to a perpendicular bisector of the width direction of the shell.

4. The rear water-cooled wall tube bundle according to claim 3, characterized in that: One side of the filter plate 2 is welded to the shell, and the other side of the filter plate 2 is welded and fixed to another filter plate 2. The combined cross section of the two filter plates 2 is an inverted triangle.

5. The rear water-cooled wall tube bundle according to claim 1, characterized in that: A down pipe is arranged at the bottom of the shell.

6. The rear water-cooled wall tube bundle according to claim 5, characterized in that: The number of the downcomers is two, and the two downcomers are symmetrically arranged with respect to a perpendicular bisector of the width direction of the shell.

7. The rear water-cooled wall tube bundle according to claim 1, characterized in that: One side of the shell is connected with a horizontally arranged liquid level pipe.

8. The rear water-cooled wall tube bundle according to claim 7, characterized in that: The two liquid level tubes are arranged as a group, and the two liquid level tubes are symmetrically arranged with respect to a horizontal bisector of the shell.

9. The rear water-cooled wall tube bundle according to claim 8, characterized in that: The tail end of the liquid level tube is located in the inner cavity of the shell, and a connecting tube is connected between the tail ends of the two liquid level tubes.

10. The rear water-cooled wall tube bundle according to claim 9, characterized in that: Both ends of the connecting pipe extend outwards and the ends are set as openings.

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