A y-type heat exchanger and a reactor with heat exchange device

Abstract

The application discloses a Y-shaped heat exchanger and a reactor with the heat exchanger, and the Y-shaped heat exchanger comprises a heat exchanger shell (9), a gas-liquid separation cavity (7), a heat exchange pipe A (21) arranged downwards along a horizontal plane, a heat exchange pipe B (22) arranged upwards along the horizontal plane, and a heat exchange pipe C (23) arranged upwards along the horizontal plane; the heat exchanger shell (9), the heat exchange pipe A (21), the heat exchange pipe B (22) and the heat exchange pipe C (23) form a heat exchange cabin (15); and the heat exchange pipe A (21), the heat exchange pipe B (22) and the heat exchange pipe C (23) are communicated with the gas-liquid separation cavity (7) respectively; a backflow port (3) is arranged at the lower end of the heat exchange pipe A (21), a gas inlet (1) is arranged at the upper end of the heat exchange pipe B (22), and a gas outlet (2) is arranged at the upper end of the heat exchange pipe C (23). The application is used in a physical and chemical reaction process, can completely avoid the accumulation of dangerous gas, and guarantees the gas-liquid separation effect and the heat exchange effect.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of heat exchange in chemical production, in particular to a Y-shaped heat exchanger for heat exchange and gas-liquid separation and a reactor with a heat exchange device. BACKGROUND

[0002] Currently used heat exchangers mainly use heat exchange medium to heat or cool the required medium, such as U-shaped or tube heat exchangers. In the process of physical and chemical reaction industrial production, a large amount of gas that is not soluble in the solvent or gas that cannot be condensed will be produced. Through the current U-shaped or tube heat exchanger, it is impossible to achieve the purpose of completely discharging liquid and gas.

[0003] Currently used U-shaped or tube heat exchangers will accumulate some gas inside the heat exchanger during the physical and chemical reaction process. Some need to be replaced by a large amount of nitrogen to ensure the safety of the entire reaction system. Moreover, the existing heat exchanger heat exchange process form cannot completely replace the existing dangerous gas and cannot detect the dangerous gas, which cannot guarantee the safety of the reaction process.

[0004] In the laboratory, a small amount of medium physical and chemical reaction cannot reflect some heat exchange and gas-liquid separation problems produced in the actual production process due to the use of glass heat exchangers. In the process of physical and chemical reaction, some gas medium needs to be discharged, and some condensate needs to be recovered and then recycled into the reaction container for reaction. The currently used ordinary heat exchanger cannot meet the use requirements of physical and chemical reaction, and the process flow form and heat exchange form of the heat exchanger in the physical and chemical reaction process need to be changed.

[0005] CN203183729U discloses a condensation reflux device of an epoxy reaction kettle. The reflux device is placed at the top of the reaction kettle and connected to the reaction kettle through a barrel-shaped reflux container and connected to the vent at the other end. During production operation, due to the heat release reaction in the reaction container, there is a phenomenon of backflow of discharged gas and reflux liquid in the condensation reflux pipe. The gas flow of the reaction kettle blocks the reflux of the condensate into the reaction kettle, causing some materials to be unable to participate in the reaction. Moreover, due to the backflow of gas and condensate in the condensation reflux device, the liquid reflux is not smooth, which will cause the gas to carry water at the vent, causing waste of materials and environmental pollution, etc.

[0006] CN206549614U discloses a reflux condenser related to the field of chemical production, the heat exchanger is arranged vertically, the top of the heat exchanger is connected with the rising gas port of the top of the reaction kettle, the bottom of the heat exchanger is connected with the reflux port of the top of the reaction kettle, and a demister is arranged. In actual industrial production and reaction process involving dangerous gas, dangerous gas can remain in the top of the heat exchanger and cannot be completely emptied, which poses a certain safety hazard. Even if a replacement valve is installed at the top of the heat exchanger, there is still a certain operation risk. SUMMARY

[0007] To solve the above problems in the prior art, the first aspect of the present application provides a Y-shaped heat exchanger for physical and chemical reaction processes, which can completely avoid the accumulation of dangerous gas and ensure the gas-liquid separation effect and heat exchange effect.

[0008] The application adopts the following technical solutions:

[0009] A Y-shaped heat exchanger, comprising a heat exchanger shell 9, a gas-liquid separation chamber 7, a heat exchange pipe A 21 arranged downward along the horizontal plane, a heat exchange pipe B 22 arranged upward along the horizontal plane, and a heat exchange pipe C 23 arranged upward along the horizontal plane, the heat exchanger shell 9, the heat exchange pipe A 21, the heat exchange pipe B 22, and the heat exchange pipe C 23 form a heat exchange cabin 15, and the heat exchange pipe A 21, the heat exchange pipe B 22, and the heat exchange pipe C 23 are respectively communicated with the gas-liquid separation chamber 7; the lower end of the heat exchange pipe A 21 is provided with a reflux port 3, the upper end of the heat exchange pipe B 22 is provided with a gas inlet 1, and the upper end of the heat exchange pipe C 23 is provided with a gas outlet 2.

[0010] Further, the reflux port end of the heat exchanger shell 9 is provided with a heat exchange medium inlet 4, and the gas inlet end and the gas outlet end of the heat exchanger shell 9 are respectively provided with a heat exchange medium outlet B 6 and a heat exchange medium outlet A 5. The heat exchange medium of the Y-shaped heat exchanger is arranged from low to high to ensure the cooling effect of the mixed gas. The heat exchange medium flows outside the heat exchange pipe and in the heat exchanger shell 9 to ensure the cooling effect of the mixed gas.

[0011] Further, the included angle between the heat exchange pipe B 22 and the heat exchange pipe C 23 is greater than 0° and less than 180°, and the included angle between the heat exchange pipe A 21 and the horizontal plane is greater than 0° and less than 180°, which can be arranged according to the actual situation of reaction and heat exchange. The included angle between the heat exchange pipe A 21 and the horizontal plane is preferably 10-170°, 15-165°, 30-150°, 60-120°, and further preferably 90°; the included angle between the heat exchange pipe B 22 and the heat exchange pipe C 23 is preferably 10-170°, 15-165°, 30-150°, 60-120°. Further preferably, the included angles between the heat exchange pipe A 21, the heat exchange pipe B 22, and the heat exchange pipe C 23 are 120°, and the heat exchange pipe A 21 is arranged vertically to the horizontal plane.

[0012] Further, the heat exchange pipes A 21, the heat exchange pipes B 22 and the heat exchange pipes C 23 are of the same type or different types, and are selected from straight heat exchange pipes, spherical heat exchange pipes, serpentine heat exchange pipes or column heat exchange pipes.

[0013] Further, the gas-liquid separation cavity 7 is of the following types: 1. the gas-liquid separation cavity 7 is a cavity, and gravity sedimentation is adopted, the Y-type heat exchanger is vertically arranged, and gravity is used for gas-liquid separation; 2. the gas-liquid separation cavity 7 is a cavity centrifugal separation cavity, and centrifugal force separation is adopted, the material enters the gas-liquid separation cavity 7 at a certain speed, and vortex rotation force is formed in the gas-liquid separation cavity to perform gas-liquid separation; 3. a demister wire mesh or packing is arranged in the gas-liquid separation cavity 7 to perform gas-liquid separation; 4. baffles are arranged in the gas-liquid separation cavity 7 to increase the flow path of gas and liquid in the separation cavity to perform gas-liquid separation; 5. an ultrafiltration membrane is arranged in the gas-liquid separation cavity 7 to effectively gather small molecular substances and perform gas-liquid separation; and the actual reaction needs can be designed.

[0014] Further, the gas-liquid separation cavity 7 is of the following types: 1. the gas-liquid separation cavity 7 is a cavity, and gravity sedimentation is adopted, the Y-type heat exchanger is vertically arranged, and gravity is used for gas-liquid separation; 2. the gas-liquid separation cavity 7 is a cavity centrifugal separation cavity, and centrifugal force separation is adopted, the material enters the gas-liquid separation cavity 7 at a certain speed, and vortex rotation force is formed in the gas-liquid separation cavity to perform gas-liquid separation; 3. a demister wire mesh or packing is arranged in the gas-liquid separation cavity 7 to perform gas-liquid separation; 4. baffles are arranged in the gas-liquid separation cavity 7 to increase the flow path of gas and liquid in the separation cavity to perform gas-liquid separation; 5. an ultrafiltration membrane is arranged in the gas-liquid separation cavity 7 to effectively gather small molecular substances and perform gas-liquid separation; and the actual reaction needs can be designed.

[0015] Further, the gas inlet 1, the gas outlet 2 and the reflux port 3 are provided with a partition plate or a sealing gasket between the gas inlet 1, the gas outlet 2 and the reflux port 3 and the heat exchanger shell 9, the partition plate and the sealing gasket are used for isolation, so that the mixed gas and the condensed liquid cannot enter the heat exchanger shell, and the heat exchange medium cannot enter the heat exchange pipes.

[0016] Further, valves are arranged on the heat exchange medium inlet pipeline and the heat exchange medium outlet pipeline, the flow of the heat exchange medium is controlled by adjusting the valves, and the temperature of the condensed liquid and the non-condensed gas is adjusted.

[0017] The second aspect of the present application provides a reactor with a heat exchange device, which comprises a reactor 11 and a Y-type heat exchanger 10, the gas inlet 1 of the Y-type heat exchanger is connected with the reactor 11, and the reflux port 3 of the Y-type heat exchanger is connected with the reactor 11 or a recovery kettle 12.

[0018] The present application has the beneficial effects that: after the mixed gas generated in the physical and chemical reaction process is exchanged by the Y-type heat exchanger 10, the liquid flows into the gas-liquid separation cavity 7, the non-condensed gas is discharged through the gas outlet 2, and the liquid flows from the gas-liquid separation cavity 7 into the reflux port 3. In the whole reaction process, the heat exchanger can effectively ensure the separation of the non-condensed gas and the condensed liquid, and ensure that the condensed liquid flows back to the reaction container in the reaction process, so that the effective recovery of the reaction material is ensured, the loss of the reaction material is avoided, the water hammer caused by the accumulation of the condensed liquid at the bottom of the heat exchanger is reduced, and damage to the heat exchanger is avoided. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a structural diagram of the Y-type heat exchanger of the present application;

[0020] Figure 2 is a column tube arrangement diagram of the Y-type heat exchanger of the present application;

[0021] Figure 3 is a serpentine heat exchange tube arrangement diagram of the Y-type heat exchanger of the present application;

[0022] Figure 4 is a schematic diagram of the installation state of the Y-type heat exchanger of the present application;

[0023] Figure 5 is a schematic diagram of the installation state of the Y-type heat exchanger of the present application;

[0024] Wherein: 1. gas inlet, 2. gas outlet, 3. backflow port, 4. heat exchange medium inlet, 5. heat exchange medium outlet A, 6. heat exchange medium outlet B, 7. gas-liquid separation chamber, 9. heat exchanger shell, 10. Y-type heat exchanger, 11. reactor, 12. recovery kettle, 15. heat exchange cabin, 21. heat exchange tube A, 22. heat exchange tube B, 23. heat exchange tube C, 81. column tube heat exchange tube, 82. serpentine heat exchange tube. DETAILED DESCRIPTION

[0025] The role and effect of the present application are further illustrated below in combination with examples, which are not limited to the following examples.

[0026] Example 1

[0027] As shown in Figure 1 , the Y-type heat exchanger comprises a heat exchanger shell 9, a gas-liquid separation chamber 7, a heat exchange tube A 21 arranged downward along the horizontal plane, a heat exchange tube B 22 arranged upward along the horizontal plane, and a heat exchange tube C 23 arranged upward along the horizontal plane. The heat exchanger shell 9, the heat exchange tube A 21, the heat exchange tube B 22, and the heat exchange tube C 23 form a heat exchange cabin 15, and the heat exchange tube A 21, the heat exchange tube B 22, and the heat exchange tube C 23 are respectively communicated with the gas-liquid separation chamber 7. The lower end of the heat exchange tube A 21 is provided with a backflow port 3, the upper end of the heat exchange tube B 22 is provided with a gas inlet 1, and the upper end of the heat exchange tube C 23 is provided with a gas outlet 2.

[0028] In use: mixed gas enters the heat exchange tube B 22 from the gas inlet 1, enters the gas-liquid separation chamber 7 after heat exchange, and the non-condensable gas is discharged through the gas outlet 2. The condensate flows into the reactor 11 or the recovery kettle 12 through the backflow port 3. The heat exchange medium enters the Y-type heat exchanger 10 from the heat exchange medium inlet 4, and the heat exchange medium flows out from the heat exchange medium outlet A 5 and the heat exchange medium outlet B 6.

[0029] Example 2

[0030] As shown in Figure 4As shown in the figure, the reactor with heat exchange device includes reactor 11 and Y-type heat exchanger 10, the gas inlet 1 and reflux port 3 of Y-type heat exchanger 10 are connected with reactor 11; Y-type heat exchanger adopts the heat exchanger described in embodiment 1, wherein heat exchange tube A 21, heat exchange tube B 22 and heat exchange tube C 23 are all column tube type.

[0031] Embodiment 3

[0032] As shown in the figure, the reactor with heat exchange device includes reactor 11 and Y-type heat exchanger 10, the gas inlet 1 and reflux port 3 of Y-type heat exchanger 10 are connected with reactor 11; Y-type heat exchanger adopts the heat exchanger described in embodiment 1, wherein heat exchange tube A 21, heat exchange tube B 22 and heat exchange tube C 23 are all column tube type. Figure 5

[0033] The process flow form of Y-type heat exchanger 10 is not limited to the above process flow, and the process flow related to the use of Y-type heat exchanger is included.​

Claims

1. A Y-type heat exchanger, characterized by, The Y-shaped heat exchanger comprises a heat exchanger shell (9), a gas-liquid separation chamber (7), a heat exchange pipe A (21) arranged downward along a horizontal plane, a heat exchange pipe B (22) arranged upward along a horizontal plane, and a heat exchange pipe C (23) arranged upward along a horizontal plane. The heat exchanger shell (9), the heat exchange pipe A (21), the heat exchange pipe B (22), and the heat exchange pipe C (23) form a heat exchange cabin (15), and the heat exchange pipe A (21), the heat exchange pipe B (22), and the heat exchange pipe C (23) are communicated with the gas-liquid separation chamber (7) respectively. The heat exchange pipe A (21) is provided with a backflow port (3) at a lower end thereof, the heat exchange pipe B (22) is provided with a gas inlet (1) at an upper end thereof, and the heat exchange pipe C (23) is provided with a gas outlet (2) at an upper end thereof. The heat exchanger shell (9) is provided with a heat exchange medium inlet (4) at a backflow port end thereof, and the heat exchanger shell (9) is provided with a heat exchange medium outlet B (6) and a heat exchange medium outlet A (5) at a gas inlet end and a gas outlet end thereof respectively.

2. The Y-type heat exchanger of claim 1, wherein An included angle between the heat exchange pipe B (22) and the heat exchange pipe C (23) is greater than 0° and less than 180°, and an included angle between the heat exchange pipe A (21) and a horizontal plane is greater than 0° and less than 180°.

3. The Y-type heat exchanger of claim 2, wherein The included angle between the heat exchange pipe A (21) and the horizontal plane is 10-170°, and the included angle between the heat exchange pipe B (22) and the heat exchange pipe C (23) is 10-170°.

4. The Y-type heat exchanger of claim 2, wherein An included angle between the heat exchange pipe A (21), the heat exchange pipe B (22), and the heat exchange pipe C (23) is 120°, and the heat exchange pipe A (21) is arranged perpendicularly to the horizontal plane.

5. The Y-type heat exchanger of claim 1, wherein The heat exchange pipe A (21), the heat exchange pipe B (22), and the heat exchange pipe C (23) are of the same type or different types and are selected from straight heat exchange pipes, spherical heat exchange pipes, serpentine heat exchange pipes, or tube heat exchange pipes.

6. The Y-type heat exchanger of claim 1, wherein The gas-liquid separation chamber (7) is a hollow cavity or a centrifugal separation chamber.

7. The Y-type heat exchanger of claim 1, wherein A defoaming wire mesh, a filler, a baffle, or an ultrafiltration membrane is arranged in the gas-liquid separation chamber (7).

8. The Y-type heat exchanger of claim 1, wherein The gas-liquid separation chamber (7) is spherical, polyhedral, or trihedral.

9. The Y-type heat exchanger of claim 1, wherein A baffle or a sealing gasket is arranged between the gas inlet (1), the gas outlet (2), the backflow port (3), and the heat exchanger shell (9), and a valve is arranged on a heat exchange medium inlet pipeline and / or a heat exchange medium outlet pipeline.

10. A reactor provided with a heat exchange device, comprising a reactor (11) and a Y-shaped heat exchanger (10) according to any one of claims 1-9, wherein the gas inlet (1) of the Y-shaped heat exchanger is connected to the reactor (11), and the backflow port (3) of the Y-shaped heat exchanger is connected to the reactor (11) or a recovery kettle (12).

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