Jet type supergravity multiphase reaction device

Abstract

The invention discloses a jet type supergravity multiphase reaction device, and relates to the technical field of reaction devices. Comprising an annular reaction kettle, the top of the annular reaction kettle is provided with a gas feed port, a solid-liquid feed port and an emptying port, and the bottom of the annular reaction kettle is provided with a reaction kettle liquid outlet; the supergravity assembly is arranged in the annular reaction kettle; a first end of the jet ejector is provided with an air suction port and an ejector liquid inlet, and a second end of the jet ejector is provided with an opening and extends into the annular reaction kettle; the air suction port is connected with the top of the annular reaction kettle; a liquid outlet of the heat exchanger is connected with a liquid inlet of the ejector, and a liquid inlet of the heat exchanger is connected with a liquid outlet of the reaction kettle; the discharge hole is formed between the liquid inlet of the heat exchanger and the liquid outlet of the reaction kettle. The multi-phase reaction device can realize automatic loading and unloading of solid particles in a liquid-phase material, is high in equipment operation elasticity and high in universality, and is a green and efficient multi-phase reaction device.

Description

Technical Field

[0001] The invention relates to the technical field of reaction devices, in particular to a jet-type supergravity multiphase reaction device. Background Art

[0002] Gas-liquid and gas-liquid-solid multiphase reactions occupy an important position in chemical production. The unit reaction processes involved include oxygen oxidation, hydrogenation reduction, carbonylation (carboxylation), alkylation and many other reaction types. Traditional stirred tank reactors are widely used in multiphase reaction processes. Due to the differences in reaction kinetic characteristics, the mass and heat transfer efficiency between phases have a great influence on the reaction rate, selectivity and time-space production efficiency. In order to improve the technical and economic indicators of multiphase reaction processes and achieve energy-saving and consumption-reducing green production, new process intensification technologies have gradually received widespread attention and development.

[0003] In recent years, representative reactor (device) technologies include microchannel reactors, ultra-gravity reactors, loop reactors, etc. The common feature of these reaction technologies is that they greatly enhance the quality and heat transfer performance of the reaction process, and play a huge role in promoting the improvement and enhancement of the technical and economic indicators of the production process. However, gas-liquid and gas-liquid-solid multiphase reactions are different and complex, which also means that a certain reaction technology only solves one link in the entire path, and the improvement of the entire reaction process is limited. For example, in the gas-liquid-solid three-phase reaction process, the rate-controlling step is mostly the gas-liquid mass transfer rate, but after the gas-liquid mass transfer is enhanced, the mass transfer rate between the liquid and solid phases becomes the rate-controlling step of the process, which makes the quality and efficiency of the process limited. Summary of the invention

[0004] The main purpose of the present invention is to provide a jet-type high-gravity multiphase reaction device to solve the above-mentioned problems.

[0005] To achieve the above object, the present invention provides a jet-type high-gravity multiphase reaction device, comprising:

[0006] An annular reactor, wherein the top of the annular reactor is provided with a gas feed port, a solid and liquid feed port and a vent port, and the bottom is provided with a reactor liquid outlet;

[0007] A super gravity component, wherein the super gravity component is arranged in the annular reactor;

[0008] A jet ejector, the jet ejector is located at the lower side of the annular reactor, a first end of the jet ejector is provided with an air intake port and an ejector liquid inlet, a second end of the jet ejector is open and extends into the annular reactor; the air intake port is connected to the top of the annular reactor through a gas circulation pipe;

[0009] A heat exchanger, wherein the heat exchanger liquid outlet of the heat exchanger is connected to the ejector liquid inlet, and the heat exchanger liquid inlet of the heat exchanger is connected to the reactor liquid outlet;

[0010] A discharge port, wherein the discharge port is arranged between the liquid inlet of the heat exchanger and the liquid outlet of the reactor.

[0011] Furthermore, the supergravity assembly includes a supergravity drum, a rotating shaft and a driving motor; the driving motor is arranged outside the annular reactor, the rotating shaft is drivingly connected to the driving motor and extends into the annular reactor, and the supergravity drum is arranged in the annular reactor and is coaxially connected to the rotating shaft.

[0012] Furthermore, the supergravity drum includes an upper end cover and a lower end cover, and a support column and a filter screen are arranged between the upper end cover and the lower end cover to form a supergravity space, and a plurality of blades are evenly distributed in the supergravity space; a pressure balance channel and a fixed sleeve are arranged on the upper end cover, and the fixed sleeve is connected to the rotating shaft; a material suction port is arranged on the lower end cover, and the supergravity space is connected with the outside through the material suction port.

[0013] Furthermore, a heat-insulating jacket is provided on the outer wall of the annular reactor, and a plurality of baffles are evenly distributed on the inner wall, and the baffles correspond to the supergravity drum.

[0014] Furthermore, there are a plurality of supergravity drums coaxially and evenly distributed, and the rotating shaft is connected to the plurality of supergravity drums in sequence.

[0015] Furthermore, the distance between the pressure balance channel and the axis of the upper end cover is 1 / 3 to 2 / 3 of the radius of the upper end cover.

[0016] Furthermore, the diameter of the pressure balance channel is 1 / 5 to 1 / 20 of the diameter of the upper end cover.

[0017] Furthermore, the number of the pressure balance channels is 1 to 10 times the number of the blades.

[0018] Furthermore, the jet ejector comprises an air suction chamber, a mixing chamber and a diffusion pipe which are connected in sequence, a nozzle is arranged in the air suction chamber, the air suction port is arranged on the air suction chamber, and the ejector liquid inlet is arranged on the nozzle.

[0019] Furthermore, the cross-sectional area of ​​the mixing chamber is smaller than that of the suction chamber, the cross-sectional area of ​​the diffusion tube at one end away from the mixing chamber is larger than that of the mixing chamber, and the ratio of the cross-sectional area of ​​the mixing chamber to the cross-sectional area of ​​the nozzle is 2:1 to 10:1.

[0020] The present invention uses an external heat exchanger so that the setting of the heat exchange surface is no longer limited by the size of the reaction equipment, fundamentally solving the problem of heat transfer due to the high heat release intensity caused by the increased reaction rate, and further improving the quality and efficiency of the multiphase reaction process. Through automatic loading and unloading of solid particles, the abrasion of solid particle materials on equipment during the production process is reduced, and the labor intensity of solid material transportation is reduced, thereby solving the problems of high material consumption and energy consumption, low labor productivity, and poor safety and environmental protection in fine chemical production. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is an overall schematic diagram of a jet-type supergravity multiphase reaction device of the present invention.

[0022] Figure 2 The diagram is a schematic diagram of a supergravity drum of a jet-type supergravity multiphase reaction device of the present invention.

[0023] Figure 3 This is a top view of the structure of a supergravity drum of a jet-type supergravity multiphase reaction device of the present invention.

[0024] Figure 4 This is a schematic diagram of a jet ejector of a jet-type supergravity multiphase reaction device of the present invention.

[0025] Figure 5 is the gas-liquid mass transfer coefficient under different circulation pump flow rates at a fixed high gravity drum speed.

[0026] Figure 6 is the gas-liquid mass transfer coefficient at different supergravity drum speeds with fixed circulating pump flow rate.

[0027] Among them, 1. jet ejector, 1-1. air intake, 1-2. air intake chamber, 1-3. nozzle, 1-4. mixing chamber, 1-5. diffusion tube, 1-6. ejector liquid inlet, 2-annular reactor, 3-insulating jacket, 4. supergravity drum, 4-1. paddle, 4-2. filter, 4-3. pressure balance channel, 4-4. upper end cover, 4-5. lower end cover, 4-6. material suction port, 4-7. fixed shaft sleeve, 5. baffle, 6. rotating shaft, 7. gas feed port, 8. solid-liquid feed port, 9. vent, 10. gas circulation pipe, 11. heat exchanger liquid outlet, 12. heat exchanger, 13. heat exchange medium outlet, 14. heat exchanger liquid inlet, 15. circulation pump, 16. heat exchange medium inlet, 17. reactor liquid outlet, 18. discharge port. DETAILED DESCRIPTION

[0028] In order to achieve the above-mentioned purpose and effect, the technical means and structures adopted by the present invention are described in detail with reference to the accompanying drawings for the features and functions of the preferred embodiments of the present invention.

[0029] like Figure 1-Figure 4As shown, the present invention provides a jet-type high-gravity multiphase reaction device, comprising:

[0030] The annular reactor 2 has a gas feed port 7, a solid-liquid feed port 8 and a vent port 9 at the top and a reactor liquid outlet 17 at the bottom;

[0031] A supergravity component is arranged in the annular reactor 2; the supergravity component is used to absorb and restrain solid particles;

[0032] The jet ejector 1 is located at the lower side of the annular reactor 2. The first end of the jet ejector 1 is provided with an air intake port 1-1 and an ejector liquid inlet 1-6. The second end of the jet ejector 1 is open and extends into the annular reactor 2. The air intake port 1-1 is connected to the top of the annular reactor 2 through a gas circulation pipe 10 to form a gas circulation channel.

[0033] The heat exchanger 12 is provided with a heat exchanger liquid outlet 11, a heat exchange medium outlet 13, a heat exchanger liquid inlet 14 and a heat exchange medium inlet 16. The heat exchanger liquid outlet 11 of the heat exchanger 12 is connected with the ejector liquid inlets 1-6 to construct a liquid circulation channel; the heat exchanger liquid inlet 14 of the heat exchanger 12 is connected with the reactor liquid outlet 17, and a circulation pump 15 is provided between the heat exchanger liquid inlet 14 and the reactor liquid outlet 17;

[0034] The discharge port 18 is arranged between the circulation pump 15 and the liquid outlet 17 of the reactor. A valve is arranged at the discharge port 18 to control the opening and closing of the discharge port 18 .

[0035] Specifically, the supergravity assembly includes a supergravity drum 4, a rotating shaft 6 and a driving motor; the driving motor is fixedly arranged on the outside of the annular reactor 2, the rotating shaft 6 is connected to the driving motor and extends into the annular reactor 2, and the supergravity drum 4 is arranged in the annular reactor 2 and is coaxially connected to the rotating shaft 6.

[0036] Specifically, the supergravity drum 4 includes an upper end cover 4-4 and a lower end cover 4-5, a support column and a filter screen 4-2 are arranged between the upper end cover 4-4 and the lower end cover 4-5, the filter screen 4-2 connects the outer walls of the upper end cover 4-4 and the lower end cover 4-5 to form a supergravity space in the upper end cover 4-4 and the lower end cover 4-5, and a plurality of blades 4-1 are evenly distributed in the supergravity space; a pressure balance channel 4-3 and a fixed shaft sleeve 4-7 are arranged on the upper end cover 4-4, the fixed shaft sleeve 4-7 is connected to the rotating shaft 6, and a material suction port 4-6 is arranged on the lower end cover 4-5, and the supergravity space is connected with the outside through the material suction port 4-6.

[0037] Preferably, there are multiple supergravity drums 4 coaxially and evenly distributed, and the fixed sleeve 4 - 7 and the upper end cover 4 - 4 are provided with openings adapted to the rotating shaft 6 , and the rotating shaft 6 passes through the openings and is sequentially connected to the multiple supergravity drums 4 .

[0038] Preferably, the filter screen 4-2 is in contact with the outer edges of the blade 4-1 and the upper and lower end covers, and the pore size of the filter screen 4-2 is 10 to 1000 meshes.

[0039] Preferably, the distance between the pressure balance channel 4-3 and the axis of the upper end cover 4-4 is 1 / 3 to 2 / 3 of the radius of the upper end cover 4-4. The diameter of the pressure balance channel 4-3 is 1 / 5 to 1 / 20 of the diameter of the upper end cover 4-4. The number of pressure balance channels 4-3 is 1 to 10 times the number of blades 4-1.

[0040] Preferably, a heat-insulating jacket 3 is provided on the outer wall of the annular reactor, and a plurality of baffles 5 are evenly distributed on the inner wall, and the baffles 5 correspond to the supergravity drum 4 .

[0041] In this embodiment, the ejector 1 includes an air suction chamber 1-2, a mixing chamber 1-4 and a diffusion tube 1-5 which are connected in sequence, a nozzle 1-3 is arranged in the air suction chamber 1-2, an air suction port 1-1 is arranged on the air suction chamber 1-2, and an ejector liquid inlet 1-6 is arranged on the nozzle 1-3.

[0042] Specifically, the cross-sectional area of ​​the mixing chamber 1-4 is smaller than that of the suction chamber 1-2, the cross-sectional area of ​​the diffuser 1-5 at one end away from the mixing chamber 1-4 is larger than that of the mixing chamber 1-4, and the ratio of the cross-sectional area of ​​the mixing chamber 1-4 to the cross-sectional area of ​​the nozzle 1-3 is 2 to 10:1.

[0043] In another embodiment, the volume of the annular reactor is 25L, the ratio of the cross-sectional area of ​​the mixing chamber and the nozzle of the jet ejector is 5:1, the number of supergravity drums is 2, the volume of a single supergravity drum is 0.5L, the number of blades of a single supergravity drum is 5, a 200-mesh filter is installed outside the supergravity drum, the number of pressure balance channels of each supergravity drum is 5, and 4 baffles are arranged on the outside of the supergravity drum.

[0044] When in use, feed according to 80% of the filling volume, start the circulation pump, and set the pump flow rate to 1-3m 3 / h, run the supergravity drum, set the speed to 300rpm, add 0.5L of 100-mesh activated carbon particles into the annular reactor, and when the supergravity drum rotates, it will guide the liquid in the reactor to move toward the supergravity drum. The liquid will enter the supergravity drum through the material suction port and be thrown out from the filter. At this time, the solid particles will be automatically loaded into the supergravity drum with the liquid and stay in the supergravity drum under the obstruction of the filter.

[0045] According to the process requirements, if it is necessary to discharge solid particles, shut down the supergravity drum, and the solid particles are automatically unloaded into the annular reactor under the influence of gravity; if it is necessary to discharge liquid materials without unloading solid particles, shut down the circulation pump, keep the supergravity drum running, open the discharge port, discharge the liquid material from the reactor, close the discharge port, and continue to add the next batch of liquid materials.

[0046] By adjusting the circulation pump flow and drum speed, the gas-liquid mass transfer coefficient of the device was tested with a dissolved oxygen tester. Figure 5 and Figure 6 The test results show that within the tested flow rate and speed range, the gas-liquid mass transfer coefficient increases with the increase of the circulation pump flow rate, and gradually increases with the increase of the supergravity drum speed and then tends to be stable. It can be seen that the gas-liquid mass transfer coefficient of the reaction device is controllable, the operation is flexible, and the process operation conditions can be optimized according to the kinetic characteristics of different reaction processes.

[0047] The above descriptions are only preferred embodiments of the present invention, not all embodiments. Anyone should be aware that any structural changes made under the inspiration of the present invention, and any technical solutions that are the same or similar to the present invention, belong to the protection scope of the present invention.

Claims

1. A jet-type high-gravity multiphase reaction device, characterized in that: include: An annular reactor (2), wherein the top of the annular reactor (2) is provided with a gas feed port (7), a solid and liquid feed port (8) and a vent port (9), and the bottom of the annular reactor (2) is provided with a reactor liquid outlet (17); A supergravity component, wherein the supergravity component is arranged in the annular reactor (2); A jet ejector (1), the jet ejector (1) being located at the lower side of the annular reactor (2), a first end of the jet ejector (1) being provided with an air intake port (1-1) and an ejector liquid inlet port (1-6), a second end of the jet ejector (1) being open and extending into the annular reactor (2); the air intake port (1-1) being connected to the top of the annular reactor (2) via a gas circulation pipe (10); A heat exchanger (12), wherein a heat exchanger liquid outlet (11) of the heat exchanger (12) is connected to the ejector liquid inlet (1-6), and a heat exchanger liquid inlet (14) of the heat exchanger (12) is connected to the reactor liquid outlet (17); A discharge port (18), wherein the discharge port (18) is arranged between the liquid inlet of the heat exchanger (12) and the liquid outlet (17) of the reactor.

2. A jet-type high-gravity multiphase reaction device as claimed in claim 1, characterized in that: The supergravity assembly comprises a supergravity drum (4), a rotating shaft (6) and a driving motor; the driving motor is arranged outside the annular reactor (2), the rotating shaft (6) is drivingly connected to the driving motor and extends into the annular reactor (2), and the supergravity drum (4) is arranged in the annular reactor (2) and is coaxially connected to the rotating shaft (6).

3. A jet-type high-gravity multiphase reaction device as claimed in claim 2, characterized in that: The supergravity drum (4) comprises an upper end cover (4-4) and a lower end cover (4-5); a support column and a filter screen (4-2) are arranged between the upper end cover (4-4) and the lower end cover (4-5) to form a supergravity space; a plurality of blades (4-1) are evenly distributed in the supergravity space; a pressure balance channel (4-3) and a fixed shaft sleeve (4-7) are arranged on the upper end cover (4-4); the fixed shaft sleeve (4-7) is connected to the rotating shaft (6); a material suction port (4-6) is arranged on the lower end cover (4-5); and the supergravity space is connected to the outside through the material suction port (4-6).

4. A jet-type high-gravity multiphase reaction device as claimed in claim 3, characterized in that: A heat-insulating jacket (3) is arranged on the outer wall of the annular reactor (2), and a plurality of baffles (5) are evenly distributed on the inner wall, wherein the baffles (5) correspond to the supergravity drum (4).

5. A jet-type high-gravity multiphase reaction device as claimed in claim 3, characterized in that: The supergravity drums (4) are coaxially and evenly distributed in plurality, and the rotating shaft (6) is sequentially connected to the plurality of supergravity drums (4).

6. A jet-type high-gravity multiphase reaction device as claimed in claim 5, characterized in that: The distance between the pressure balance channel (4-3) and the axis of the upper end cover (4-4) is 1 / 3 to 2 / 3 of the radius of the upper end cover (4-4).

7. A jet-type high-gravity multiphase reaction device as claimed in claim 6, characterized in that: The diameter of the pressure balance channel (4-3) is 1 / 5 to 1 / 20 of the diameter of the upper end cover (4-4).

8. A jet-type high-gravity multiphase reaction device as claimed in claim 7, characterized in that: The number of the pressure balance channels (4-3) is 1 to 10 times the number of the blades (4-1).

9. The jet-type high-gravity multiphase reaction device according to claim 1, characterized in that: The jet ejector (1) comprises an air suction chamber (1-2), a mixing chamber (1-4) and a diffusion pipe (1-5) which are connected in sequence, a nozzle (1-3) is arranged in the air suction chamber (1-2), the air suction port (1-1) is arranged on the air suction chamber (1-2), and the ejector liquid inlet (1-6) is arranged on the nozzle (1-3).

10. A jet-type high-gravity multiphase reaction device as claimed in claim 9, characterized in that: The cross-sectional area of ​​the mixing chamber (1-4) is smaller than the cross-sectional area of ​​the suction chamber (1-2), the cross-sectional area of ​​the end of the diffusion tube (1-5) away from the mixing chamber (1-4) is larger than the cross-sectional area of ​​the mixing chamber (1-4), and the ratio of the cross-sectional area of ​​the mixing chamber (1-4) to the cross-sectional area of ​​the nozzle (1-3) is 2:1 to 10:1.

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