Multilayer separation return tank

Abstract

The utility model belongs to the technical field of return tanks, and particularly relates to a multi-layer separation return tank which comprises a tank body, the tank body is provided with a first-stage cavity and a second-stage cavity, a partition plate is arranged between the first-stage cavity and the second-stage cavity for division, an inlet pipe connected with the first-stage cavity is arranged on the tank body, and a connecting pipe connected with the first-stage cavity and the second-stage cavity is arranged on the partition plate. A double-layer air pipe penetrates through the top of the tank body and comprises an inner pipe and a sleeve, the sleeve is connected with the first-stage cavity, an inner pipe connected with the second-stage cavity penetrates through the sleeve, a connecting piece connected with the inner wall of the sleeve is arranged on the outer wall of the inner pipe, an outlet pipe connected with the second-stage cavity is arranged at the bottom of the tank body, and an outlet valve is arranged on the outlet pipe; a driving motor is arranged at the bottom of the tank body, a stirring shaft penetrating into the secondary cavity is arranged on a driving shaft of the driving motor, and a base is arranged at the bottom of the tank body. According to the multi-layer separation return tank, through a multi-layer separation structure composed of the first-stage cavity and the second-stage cavity, the separation efficiency and purity of mixed liquid are remarkably improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of reflux tanks, and particularly relates to a multi-layer separation reflux tank. Background Art

[0002] In the chemical industry, the effective separation of liquid mixtures is a core link to ensure product quality and production efficiency. However, with the development of the chemical industry, the components of mixtures are becoming increasingly complex, and the requirements for separation technology are also getting higher and higher. When dealing with such complex mixtures, the technical limitations of traditional reflux tanks are gradually emerging, making it difficult to meet the needs of modern chemical production.

[0003] However, there are obvious deficiencies in the separation efficiency of traditional reflux tanks. When the boiling points of the components in the mixture are close or there are trace amounts of volatile components, traditional equipment often fails to achieve efficient and thorough separation. This not only leads to unstable product quality but also increases the difficulty and cost of subsequent processing.

[0004] In addition, there are also defects in the gas-liquid separation effect of traditional reflux tanks. During the evaporation process, a large number of tiny liquid droplets are often entrained in the gas. If these liquid droplets are not effectively removed, they will cause damage to subsequent process equipment such as compressors and heat exchangers, and at the same time, they will also affect the purity and quality of the product. In addition, these entrained liquid droplets will also increase energy consumption and reduce the overall production efficiency.

[0005] In summary, there is a certain market demand for designing a new type of multi-layer separation reflux tank. Summary of the Invention

[0006] Aiming at the deficiencies of the above-mentioned existing technologies, the utility model provides a multi-layer separation reflux tank to solve the above problems.

[0007] A multi-layer separation reflux tank of the utility model includes a tank body. The tank body is provided with an inner cavity, and the inner cavity includes an upper first-stage cavity and a lower second-stage cavity. A partition is arranged between the first-stage cavity and the second-stage cavity to divide them. The tank body is provided with an inlet pipe connecting to the first-stage cavity, and the partition is provided with a connecting pipe connecting the first-stage cavity and the second-stage cavity. A double-layer gas pipe penetrates through the top of the tank body. The double-layer gas pipe includes an inner pipe and a sleeve. The sleeve is connected to the first-stage cavity, and the inner pipe connecting to the second-stage cavity is arranged inside the sleeve. A connecting piece connecting the inner wall of the sleeve is arranged on the outer wall of the inner pipe. The bottom of the tank body is provided with an outlet pipe connecting to the second-stage cavity, and an outlet valve is arranged on the outlet pipe. A driving motor is arranged at the bottom of the tank body, a stirring shaft penetrating into the second-stage cavity is arranged on the driving shaft of the driving motor, and a base is arranged at the bottom of the tank body.

[0008] Furthermore, sheet-like bodies are arranged on the stirring shaft, and through holes are arranged on the sheet-like bodies.

[0009] Furthermore, a pressure gauge connected to the first-stage chamber is provided on the tank body.

[0010] Furthermore, wire mesh demisters are provided in both the first-stage chamber and the second-stage chamber.

[0011] Furthermore, a discharge pipe connected to the first-stage chamber is provided on the tank body, a discharge valve is provided on the discharge pipe, and the top surface of the partition plate is inclined towards the inlet end of the discharge pipe.

[0012] Furthermore, a heat preservation layer is provided on the inner wall of the tank body.

[0013] Furthermore, a temperature sensor and a plurality of heating rods are provided in the second-stage chamber.

[0014] Furthermore, the base is a shock-absorbing base.

[0015] Furthermore, an anti-vortex plate is provided at the top end of the connecting pipe.

[0016] Compared with the prior art, this multi-layer separation reflux tank realizes the full utilization of the gas phase and liquid phase in the mixed liquid through the multi-layer separation structure composed of the first-stage chamber and the second-stage chamber, avoids the resource loss caused by insufficient separation of the light component gas phase in the traditional reflux tank, and significantly improves the separation efficiency and purity of the mixed liquid. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0018] Figure 2 is a top view sectional view of the double-layer gas pipe.

[0019] In the figure: 1. Tank body; 2. First-stage chamber; 3. Second-stage chamber; 4. Partition plate; 5. Inlet pipe; 6. Connecting pipe; 7. Double-layer gas pipe; 8. Inner pipe; 9. Sleeve; 10. Connector; 11. Outlet pipe; 12. Outlet valve; 13. Driving motor; 14. Stirring shaft; 15. Base; 16. Flake; 17. Pressure gauge; 18. Wire mesh demister; 19. Discharge pipe; 20. Discharge valve; 21. Heating rod; 22. Anti-vortex plate. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] In order to better understand the present utility model, the following will be combined with Figures 1 to 2 to explain the embodiments of the present utility model in detail.

[0021] It should be noted that the directions of "front, back, left, right, up, and down" described in the text are all based on Figure 1It is based on the "front, back, left, right, up, and down" directions. A multi-layer separation reflux tank of the present utility model includes a tank body 1, which is made of high-strength and corrosion-resistant materials to withstand the internal high-pressure and high-temperature environment. The tank body 1 is provided with an inner cavity, and the inner cavity is provided with a partition plate 4, which divides the inner cavity into an upper-level cavity 2 and a lower-level cavity 3 up and down. The top of the tank body 1 is provided with an inlet pipe 5 connecting to the upper-level cavity 2 for introducing the mixed liquid to be separated into the upper-level cavity 2. The partition plate 4 is provided with a connecting pipe 6 connecting the upper-level cavity 2 and the lower-level cavity 3, allowing the steam and liquid droplets that have been preliminarily separated in the upper-level cavity 2 to enter the lower-level cavity 3 for further separation. As Figure 1 and Figure 2 shown in, a double-layer gas pipe 7 penetrates through the top of the tank body 1. The double-layer gas pipe 7 includes an inner pipe 8 and a sleeve 9. The sleeve 9 is connected to the upper-level cavity 2, and the inner pipe 8 connecting to the lower-level cavity 3 penetrates through the sleeve 9. A connecting member 10 connecting the inner wall of the sleeve 9 is provided on the outer wall of the inner pipe 8. The bottom of the tank body 1 is provided with an outlet pipe 11 connecting to the lower-level cavity 3, and an outlet valve 12 is installed on the outlet pipe 11 to control the discharge of the separated liquid phase. A driving motor 13 is installed at the bottom of the tank body 1, and a stirring shaft 14 extending into the lower-level cavity 3 is provided on the driving shaft. A base 15 is provided at the bottom of the tank body 1 for supporting the tank body 1. Considering the problems of pipeline connection and equipment noise, the base 15 is preferably a shock-absorbing base to reduce the vibration and noise during equipment operation.

[0022] In order to improve the quality of the extracted gas phase, as Figure 1 shown in, wire mesh demisters 18 are installed in both the upper-level cavity 2 and the lower-level cavity 3. The wire mesh demister 18 in the upper-level cavity 2 is located below the sleeve 9, and the bottom end of the inlet pipe 5 passes through the wire mesh demister 18. The wire mesh demister 18 in the lower-level cavity 3 is located below the inner pipe 8, and the bottom end of the connecting pipe 6 passes through the wire mesh demister 18. Both wire mesh demisters 18 are used to efficiently capture and separate the tiny liquid droplets in the gas, improving the separation effect.

[0023] A sheet body 16 is installed on the stirring shaft 14, and a plurality of through holes are provided on the sheet body 16 to enhance the stirring effect and promote gas-liquid separation. Through the plurality of through holes provided on the sheet body 16, part of the mixed liquid leaks out from the through holes during the movement process, and part flows outside the sheet body 16. The mixed liquid can be fully mixed during the flowing process, so that the mixed liquid can fully react.

[0024] As Figure 1 shown in, a pressure gauge 17 connecting to the upper-level cavity 2 is provided on the tank body 1 for monitoring the internal pressure.

[0025] Considering that the mixed liquid in the primary chamber 2 may have residual liquid that cannot enter the secondary chamber 3 from the connecting pipe 6, and also to facilitate the cleaning of the primary chamber 2, a discharge pipe 19 and a discharge valve 20 connected to the primary chamber 2 are provided on the outer wall of the tank body 1, which are used to discharge the residual liquid when necessary. The top surface of the partition 4 is inclined toward the inlet end of the discharge pipe 19, so as to facilitate the smooth discharge of the liquid.

[0026] In order to reduce heat loss, a heat preservation layer is provided on the inner wall of the tank body 1. In addition, a temperature sensor and a plurality of heating rods 21 are provided in the secondary chamber 3 to maintain a suitable temperature for gas-liquid separation of the mixed liquid in the secondary chamber 3.

[0027] An anti-vortex plate 22 is provided at the top of the connecting pipe 6 to reduce or eliminate the vortex phenomenon generated when the mixed liquid enters the secondary chamber 3 from the primary chamber 2. The vortex may not only reduce the gas-liquid separation efficiency, but also cause liquid splashing and energy loss.

[0028] The operation mode and principle of the utility model:

[0029] The mixed liquid entering from the inlet pipe 5 is preheated or heated, which means that some low-boiling point components in the mixed liquid have begun to vaporize before entering the primary chamber 2. When these heated mixed liquids enter the primary chamber 2, since the temperature in the chamber is maintained at a high level, the gas phase components in the mixed liquid will rise rapidly and be output through the sleeve 9 set at the top. The sleeve 9 serves as the steam outlet of the primary chamber 2, effectively leading the preliminarily separated gas phase out of the system or for further processing.

[0030] After the initial separation, the remaining mixed liquid in the primary chamber 2 (including the liquid phase and part of the incompletely separated gas phase) enters the secondary chamber 3 through the connecting pipe 6 on the partition 4. In the secondary chamber 3, the mixed liquid will undergo a more rigorous separation process.

[0031] The mixed liquid entering the secondary chamber 3 is subjected to a more intense heating effect (heated by the heating rod 21), resulting in the vaporization of more low-boiling point components. These newly generated gas phases rise in the secondary chamber 3 and are output through the inner tube 8 in the double-layer gas pipe 7. The inner tube 8 serves as the pure gas outlet of the secondary chamber 3, ensuring that the pure gas after deep condensation and separation can be smoothly output.

[0032] In the secondary chamber 3, the stirring shaft 14 and the sheet 16 thereon continuously work to promote uniform heating and sufficient separation of the mixed liquid. The wire mesh frother 18 provided in both the primary and secondary chambers 3 further improves the efficiency of gas-liquid separation and ensures the purity of the gas phase.

[0033] After secondary heating and deep separation, the components remaining in the secondary chamber 3 are mainly high-boiling components or a liquid phase that is almost completely separated. These liquid phases are discharged through the outlet pipe 11 at the bottom of the tank body 1, and the outlet valve 12 installed on the outlet pipe 11 is used to control the liquid discharge speed and quantity.

[0034] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention. In the description of the present invention, unless otherwise specified and defined, it should be noted that the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a mechanical connection or an electrical connection, or it can be the communication inside two elements. It can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0035] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A multi-layer separation reflux tank, characterized in that: The invention comprises a tank body (1), wherein the tank body (1) is provided with an inner cavity, wherein the inner cavity comprises a primary cavity (2) and a secondary cavity (3) arranged one above the other, wherein a partition (4) is provided between the primary cavity (2) and the secondary cavity (3), wherein an inlet pipe (5) connected to the primary cavity (2) is provided on the tank body (1), wherein a connecting pipe (6) connecting the primary cavity (2) and the secondary cavity (3) is provided on the partition (4), wherein a double-layer air pipe (7) is provided on the top of the tank body (1), wherein the double-layer air pipe (7) comprises an inner pipe (8) and a sleeve pipe (9), wherein the sleeve pipe (9) is connected to the primary cavity (2) and the secondary cavity (3) ), an inner tube (8) connected to the secondary chamber (3) is passed through the sleeve (9), a connecting piece (10) connected to the inner wall of the sleeve (9) is provided on the outer wall of the inner tube (8), an outlet pipe (11) connected to the secondary chamber (3) is provided at the bottom of the tank body (1), and an outlet valve (12) is provided on the outlet pipe (11); a driving motor (13) is provided at the bottom of the tank body (1), a stirring shaft (14) passing through the secondary chamber (3) is provided on the driving shaft of the driving motor (13), and a base (15) is provided at the bottom of the tank body (1).

2. A multi-layer separation reflux tank as claimed in claim 1, characterized in that: The stirring shaft (14) is provided with a sheet-shaped body (16), and the sheet-shaped body (16) is provided with a through hole.

3. A multi-layer separation reflux tank as claimed in claim 1, characterized in that: The tank body (1) is provided with a pressure gauge (17) connected to the primary chamber (2).

4. A multi-layer separation reflux tank as claimed in claim 1, characterized in that: A wire mesh foam catcher (18) is provided in both the primary chamber (2) and the secondary chamber (3).

5. A multi-layer separation reflux tank as claimed in claim 1, characterized in that: The tank body (1) is provided with a discharge pipe (19) connected to the primary chamber (2), the discharge pipe (19) is provided with a discharge valve (20), and the top surface of the partition (4) is inclined toward the inlet end of the discharge pipe (19).

6. A multi-layer separation reflux tank as claimed in claim 1, characterized in that: The inner wall of the tank body (1) is provided with a heat-insulating layer.

7. A multi-layer separation reflux tank as claimed in claim 1, characterized in that: A temperature sensor and a plurality of heating rods (21) are arranged in the secondary chamber (3).

8. A multi-layer separation reflux tank as claimed in claim 1, characterized in that: The base (15) is a shock-absorbing base.

9. A multi-layer separation reflux tank as claimed in claim 1, characterized in that: A vortex prevention plate (22) is provided at the top end of the connecting pipe (6).

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