Supergravity reactor with novel spiral lifter and application

Abstract

The invention discloses a supergravity reactor with a novel spiral lifter and application. The supergravity reactor comprises a shell, a feed port, a rotor, a filler layer, a discharge port, a discharge port and the spiral lifter, the feeding holes comprise a first feeding hole and a second feeding hole, the first feeding hole is formed in the side wall of the upper part of the shell, and the second feeding hole is formed in the top of the shell; the spiral lifter comprises a lifting cavity, a spiral piece, a flange, a supporting column and an impeller. The spiral lifter can lift liquid or solid-liquid reactants in the supergravity reactor into the filler area for dispersion, so that the effective mass transfer area is increased, and the mass transfer rate is increased. The device is wide in applicability, can be used for gas-liquid or gas-liquid-solid reaction, and can remarkably enhance mass transfer, improve reaction efficiency, reduce equipment investment and operation cost and improve safety of the device.

Description

Technical Field

[0001] The present invention relates to the field of supergravity technology, and more specifically, to a supergravity reactor with a novel spiral lifter and its application. Background Art

[0002] Gas-liquid and gas-liquid-solid reaction systems are widely used in industrial production such as petrochemicals and coal chemical industry. Traditional reactors often have problems such as poor mixing and limited mass transfer.

[0003] At present, the process intensification of gas-liquid and gas-liquid-solid reactions under hypergravity environment is achieved by designing a hypergravity reactor with a spiral lifter. The principle is: when the motor is started, the motor drives the rotor and the spiral lifter located at the bottom of the rotor to rotate, and the liquid or solid-containing liquid in the reactor is lifted to the packing area for cutting and dispersion, generating micron or millimeter-level tiny droplets, which can significantly increase the gas-liquid contact area, promote mixing and mass transfer, and improve reaction efficiency.

[0004] However, the traditional spiral lifter has a simple structure and cannot effectively lift the liquid to the packing area, and the solid particles accumulate inside the reactor. As a result, the raw materials inside the reactor cannot be effectively mixed, which reduces its mass transfer rate and reaction efficiency. Therefore, it is necessary to research and develop a new type of spiral lifter that can effectively lift the liquid and enhance the dispersion effect of the solid in the reactor, and an ultra-gravity reactor with the lifter, which can effectively disperse the reactants and improve mass transfer. Summary of the invention

[0005] The first technical problem to be solved by the present invention is to provide a supergravity reactor with a novel spiral lifter.

[0006] The second technical problem to be solved by the present invention is to provide an application of the above-mentioned supergravity reactor with a novel spiral lifter.

[0007] In order to solve the above-mentioned first technical problem, the technical solution adopted by the invention is as follows:

[0008] A supergravity reactor with a novel spiral lifter comprises a shell, a feed port, a rotor, a packing layer, a discharge port, a drain port and a spiral lifter;

[0009] The feed inlet comprises a first feed inlet and a second feed inlet, the first feed inlet is arranged on the upper side wall of the shell, and the second feed inlet is arranged on the top of the shell; The discharge port is arranged on the middle side wall of the shell; The drain port is arranged at the bottom of the shell; A temperature-control jacket is provided in the shell; The upper end of the rotor is fixedly connected to the motor output shaft, the lower end is fixedly connected to the spiral lifter, and the packing layer is fixed in the rotor; The spiral lifter comprises: a lifting cavity, a spiral sheet, a flange, a support column and an impeller; The upper end of the lifting cavity is fixedly connected to the lower end surface of the rotor through a flange; The spiral sheet is arranged in the lifting cavity, distributed upward in a spiral shape, and fixedly connected to a support column located in the longitudinal center of the lifting cavity, and the length of the support column is slightly longer than the spiral lifter; The impeller is fixedly connected to the lower top end of the support column.

[0010] Preferably, the ratio of the feeding height in the supergravity reactor to the height of the supergravity reactor is 0.3-0.75.

[0011] Preferably, the ratio of the installation height of the spiral lift to the height of the supergravity reactor is 0.1-0.4.

[0012] Preferably, the ratio of the length of the spiral lift to the height of the supergravity reactor is 0.3-0.75.

[0013] Preferably, the ratio of the pitch of the spiral lifter to the length of the spiral lifter is 0.1-0.4.

[0014] Preferably, the ratio of the diameter of the support column of the spiral lifter to the diameter of the lifting cavity is 0.1-0.4.

[0015] Preferably, the impeller of the screw lift is of paddle type, propeller type, turbine type or anchor type.

[0016] Preferably, the impeller has an inclination angle of 5-85°.

[0017] Preferably, the length of the impeller is 0.3-3 times the diameter of the lifting cavity, and the width of the impeller is 0.05-0.3 times the length of the impeller.

[0018] Preferably, the number of impellers of the spiral lift is 2-6, which are evenly distributed at equal angles.

[0019] To solve the above second technical problem, the present invention adopts the following technical solution : An application of the above-mentioned ultra-gravity reactor with a novel spiral lifter in a gas-liquid / gas-liquid-solid reaction system comprises the following steps: S11, the raw materials and the catalyst are put into the supergravity reactor through the first feed port and the second feed port, the supergravity reactor is turned on, the temperature control jacket is opened to heat the materials, and the discharge port and the drain port are closed; S12, monitoring the reaction pressure, and when the pressure in the reactor drops significantly, indicating that the reaction has begun, the discharge port is opened, and the raw materials are continuously introduced and the materials are continuously taken out; S13, after the reaction is finished, close the feed port, open the discharge port to slowly release the pressure, and after the pressure returns to normal pressure, open the drain port at the bottom of the kettle to remove the remaining liquid or solid-liquid material in the kettle.

[0020] Any range described in the present invention includes the end value and any numerical value between the end values ​​and any sub-range formed by the end value or any numerical value between the end values.

[0021] Unless otherwise specified, all raw materials in the present invention can be purchased from the market, and the equipment used in the present invention can adopt conventional equipment in the relevant field or refer to the existing technology in the relevant field.

[0022] Compared with the prior art, the present invention has the following beneficial effects: : 1) The spiral lift in the present invention is connected to the rotor through a flange, which makes the installation, disassembly, cleaning and maintenance of the spiral lift very convenient. In view of the poor liquid lifting performance of the traditional lifter in the ultra-gravity reactor, the inability to effectively lift the liquid to the packing area, and the accumulation of solid particles inside the reactor, a spiral lift with a new structure is designed, which can significantly increase the liquid lifting capacity of the ultra-gravity reactor and enhance the dispersion of solid particles in the reactor. Under the pilot scale, its maximum liquid lifting capacity can reach 10L / s, which can effectively lift the reactants to the packing area for cutting, promote the circulation of reactants, enhance the dispersion effect of granular catalyst particles in the liquid phase, increase the contact area between the reactants and the solid particles, and realize efficient and controllable reaction process.

[0023] 2) The gas-liquid mass transfer efficiency is high. When the droplet diameter is small, the specific surface area of ​​the droplet is large, the gas-liquid contact efficiency increases significantly, and the droplet moves further in the gas phase in the form of a dispersed phase until it contacts the wall of the reactor. This allows it to react not only inside the packing, but also to fully contact and react with the gas phase during the flight process outside the packing. This characteristic greatly improves its mass transfer efficiency.

[0024] 3) Equipment investment: The ultra-gravity reactor of the present invention self-circulates the reactants through a spiral lift, and does not require external circulation equipment such as pumps, which can reduce equipment investment.

[0025] 4) It can effectively prevent the reactants from being contaminated. Since the ultra-gravity reactor of the present invention is equipped with a spiral lifter, the reactants inside are self-circulating, which can ensure that the reactants are prevented from being contaminated while strengthening mass transfer, and can meet the need for strict prevention of pollution in the field of biological fermentation. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. Figure 1It is a structural schematic diagram of a supergravity reactor with a spiral lifter in the present invention; Figure 2 It is a structural schematic diagram of the spiral lifter in the present invention; Figure 3 It is a structural schematic diagram of the impeller selected for the spiral lifter in the embodiment; Figure 4 The graph is a graph showing the variation of the liquid lifting amount of the spiral lifter in the present invention and the traditional lifter with the rotation speed; Figure 5 The solid content of the spiral elevator in the present invention and the traditional elevator varies with the rotation speed; Figure 6 The graph is a graph showing the mass transfer coefficient of the spiral lifter of the present invention and the traditional lifter changing with the rotation speed.

[0027] Figure 1-Figure 2 Numbers in Chinese: 1-shell, 2-temperature control jacket, 3-first feed inlet, 4-packing layer, 5-second feed inlet, 6-rotor, 7-discharge port, 8-elevator, 9-drain port, 10-elevator cavity, 11-spiral blade, 12-flange, 13-support column, 14-impeller. DETAILED DESCRIPTION

[0028] In order to more clearly illustrate the present invention, the present invention is further described below in conjunction with preferred embodiments and accompanying drawings. Similar components in the accompanying drawings are represented by the same reference numerals. It should be understood by those skilled in the art that the content specifically described below is illustrative rather than restrictive, and should not be used to limit the scope of protection of the present invention.

[0029] Various cross-sectional views of the embodiments disclosed in the present invention are shown in the accompanying drawings. These drawings are not drawn to scale, and some details are magnified and some details may be omitted for the purpose of clear expression. The shapes of various regions and layers shown in the drawings and the relative sizes and positional relationships between them are only exemplary, and may deviate in practice due to manufacturing tolerances or technical limitations, and those skilled in the art may design regions / layers with different shapes, sizes, and relative positions according to actual needs.

[0030] See also Figure 1 As shown, as one aspect of the present invention, a supergravity reactor with a novel spiral lifter includes a shell 1, a feed port, a rotor 6, a packing layer 4, a discharge port 7, a drain port 9, and a spiral lifter; The feed inlet comprises a first feed inlet 3 and a second feed inlet 5, wherein the first feed inlet 3 is arranged on the upper side wall of the shell 1, and the second feed inlet 5 is arranged on the top of the shell 1; The discharge port 7 is arranged on the middle side wall of the housing 1; The drain port 9 is arranged at the bottom of the housing 1; A temperature control jacket 2 is provided in the housing 1; The upper end of the rotor 6 is fixedly connected to the motor output shaft, and the lower end is fixedly connected to the spiral lifter, and the packing layer 4 is fixed in the rotor 6; See also Figure 2 As shown, the spiral lifter comprises: a lifting chamber 10, a spiral sheet 11, a flange 12, a support column 13 and an impeller 14; The upper end of the lifting chamber 10 is fixedly connected to the lower end surface of the rotor 6 through a flange 12; The spiral sheet 11 is arranged in the lifting cavity 10, distributed upward in a spiral shape, and fixedly connected to a support column 13 located in the longitudinal center of the lifting cavity 10, and the length of the support column 13 is slightly longer than the spiral lifter; See also Figure 3 As shown, the impeller 14 is fixedly connected to the lower top end of the support column 13 .

[0031] In certain embodiments of the present invention, the ratio of the height of the feed in the high gravity reactor to the height of the high gravity reactor is 0.3-0.75.

[0032] In certain embodiments of the present invention, the ratio of the installation height of the spiral lift to the height of the high gravity reactor is 0.1-0.4.

[0033] In certain embodiments of the present invention, the ratio of the length of the spiral lift to the height of the high gravity reactor is 0.3-0.75.

[0034] In some embodiments of the present invention, the ratio of the pitch of the screw lifter to the length of the screw lifter is 0.1-0.4.

[0035] In some embodiments of the present invention, the ratio of the diameter of the support column of the spiral lifter to the diameter of the lifting cavity is 0.1-0.4.

[0036] In certain embodiments of the present invention, the impeller of the screw lift is of paddle type, propeller type, turbine type or anchor type.

[0037] In some embodiments of the present invention, the impeller has an inclination angle of 5-85°.

[0038] In certain embodiments of the present invention, the length of the impeller is 0.3-3 times the diameter of the lifting chamber, and the width of the impeller is 0.05-0.3 times the length of the impeller.

[0039] In certain embodiments of the present invention, the number of impellers of the spiral lift is 2-6, which are evenly distributed at equal angles.

[0040] As a second aspect of the present invention, an application of the above-mentioned high gravity reactor with a novel spiral lifter in a gas-liquid / gas-liquid-solid reaction system comprises the following steps: S11, the raw materials and the catalyst are put into the supergravity reactor through the first feed port and the second feed port, the supergravity reactor is turned on, the temperature control jacket is opened to heat the materials, and the discharge port and the drain port are closed; S12, monitoring the reaction pressure, and when the pressure in the reactor drops significantly, indicating that the reaction has begun, the discharge port is opened, and the raw materials are continuously introduced and the materials are continuously taken out; S13, after the reaction is finished, close the feed port, open the discharge port to slowly release the pressure, and after the pressure returns to normal pressure, open the drain port at the bottom of the kettle to remove the remaining liquid or solid-liquid material in the kettle.

[0041] Embodiment 1: Experimental test on the liquid extraction performance of the ultra-gravity reactor with a novel spiral lifter of the present invention 1) Select a screw lift with a height of 112 mm, an inner diameter of the cavity shell of 20 mm, a pitch of 15 mm, and a paddle-type impeller; 2) Control the ratio of the installation height of the riser to the height of the high gravity reactor to be 0.1; 3) Select water as the working medium of this experiment; 4) The liquid lifting capacity of the spiral lifter was tested in a 20-liter ultra-gravity reactor, and its performance was compared with that of a spiral lifter with a traditional structure.

[0042] Conclusion Figure 4 As shown in the figure, with the increase of the rotation speed, the liquid lifting amount of the supergravity reactor increases when the new lifter and the traditional lifter are installed, but the liquid lifting amount when the new lifter is installed is significantly greater than that of the traditional lifter, and the difference between the two becomes more obvious with the increase of the rotation speed. This proves that the new lifter has excellent performance and can significantly increase the liquid lifting amount of the supergravity reactor.

[0043] Embodiment 2: Solid content test experiment of the ultra-gravity reactor with a novel spiral lifter of the present invention 1) Select a screw lift with a height of 112 mm, an inner diameter of the cavity shell of 20 mm, a pitch of 15 mm, and a paddle-type impeller; 2) Control the ratio of the installation height of the riser to the height of the high gravity reactor to be 0.1; 3) Water and Raney nickel were selected as the working media of the experiment; 4) The initial average solid content was 1%. A solid content test experiment was conducted in a 20-liter ultra-gravity reactor, and the performance was compared with that of a traditional spiral lifter.

[0044] Conclusion Figure 5As shown in the figure, with the increase of the rotation speed, when the new lifter and the traditional lifter are installed, the solid content of the raw materials in the supergravity reactor increases, but the solid content when the new lifter is installed is significantly higher than that of the traditional lifter, and the difference between the two becomes more obvious with the increase of the rotation speed. This proves that the new lifter can better enhance the dispersion of solid particles in the reactor and improve the flow and mixing of the gas-liquid-solid three-phase in the kettle.

[0045] Embodiment 3: Experimental test on mass transfer law of supergravity reactor with new type of spiral lifter of the present invention 1) Select a screw lift with a height of 112 mm, an inner diameter of the cavity shell of 20 mm, a pitch of 15 mm, and a paddle-type impeller; 2) The ratio of the installation height of the control riser to the height of the high gravity reactor is controlled to be 0.1; 3) Select water and air as the working media of this experiment; 4) In a 20-liter ultra-gravity reactor, the mass transfer coefficient under different conditions was measured using the oxygen dissolution method, and the performance was compared with that of a traditional spiral lifter.

[0046] Conclusion Figure 6 As shown in the figure, with the increase of rotation speed, the mass transfer coefficient of the high gravity reactor increases when the new lifter and the traditional lifter are installed, but the mass transfer coefficient when the new lifter is installed is significantly greater than that of the traditional lifter, and the difference between the two becomes more obvious with the increase of rotation speed. This proves that the new lifter can significantly enhance the mass transfer inside the high gravity reactor, thereby increasing the chemical reaction rate.

[0047] Embodiment 4: The invention discloses an ultra-gravity reactor with a novel spiral lifter for catalytic reaction of p-nitroanisole Hydrogenation reaction performance test experiment The high-gravity reactor of the present invention is applied to the reaction performance test experiment of catalytic hydrogenation of p-nitroanisole (PNA) to p-aminoanisole (PA), and the reaction performance of the high-gravity reactor when the new spiral lifter and the traditional lifter are respectively installed are compared. The experimental steps are as follows: S11, dissolving a certain amount of PNA in methanol, feeding the material into the reactor through the first feed port 3, selecting Raney nickel particles as the catalyst for the reaction, feeding the material into the reactor through the second feed port 5, turning on the motor, opening the temperature control jacket 2 to heat the material, and closing the discharge port 7 and the drain port 9; S12, monitoring the reaction pressure, when the pressure in the reactor drops significantly, indicating that the reaction has begun, the discharge port 7 is opened, and the raw materials are continuously introduced through the first feed port 3, and the materials are continuously taken out; S13, after the reaction is finished, close all the feed ports, open the discharge port 7 to slowly release the pressure, and after the pressure returns to normal pressure, open the cleaning port 9 to remove the remaining liquid or solid-liquid materials in the kettle.

[0048] Finally, when the rotation speed was 1500r / min and other conditions were exactly the same, the product consumption rates of the new spiral elevator and the traditional spiral elevator were tested. After 60 minutes, the reactant concentrations in the kettle (initial 100%) were 12% and 40%, respectively, proving that the new spiral elevator can effectively increase the chemical reaction rate.

[0049] Obviously, the above embodiments of the present invention are merely examples for clearly explaining the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is impossible to list all implementation methods here. Any obvious changes or modifications derived from the technical solution of the present invention are still within the scope of protection of the present invention.

Claims

1. A supergravity reactor with a new type of spiral lift, characterized in that: It includes a shell, a feed port, a rotor, a packing layer, a discharge port, a drain port, and a spiral lifter; The feed inlet comprises a first feed inlet and a second feed inlet, the first feed inlet is arranged on the upper side wall of the shell, and the second feed inlet is arranged on the top of the shell; The discharge port is arranged on the middle side wall of the shell; The drain port is arranged at the bottom of the shell; A temperature-control jacket is provided in the shell; The upper end of the rotor is fixedly connected to the motor output shaft, the lower end is fixedly connected to the spiral lifter, and the packing layer is fixed in the rotor; The spiral lifter comprises: a lifting cavity, a spiral blade, a flange, a support column and an impeller; The upper end of the lifting cavity is fixedly connected to the lower end surface of the rotor through a flange; The spiral sheet is arranged in the lifting cavity, distributed upward in a spiral shape, and fixedly connected to a support column located in the longitudinal center of the lifting cavity, and the length of the support column is slightly longer than the spiral lifter; The impeller is fixedly connected to the lower top end of the support column.

2. The ultra-gravity reactor with a novel spiral lifter according to claim 1, characterized in that: The ratio of the feeding height in the supergravity reactor to the height of the supergravity reactor is 0.3-0.

75.

3. The ultra-gravity reactor with a novel spiral lifter according to claim 1, characterized in that: The ratio of the installation height of the spiral lifter to the height of the supergravity reactor is 0.1-0.

4.

4. The ultra-gravity reactor with a novel spiral lifter according to claim 1, characterized in that: The ratio of the length of the spiral lifter to the height of the supergravity reactor is 0.3-0.

75.

5. The ultra-gravity reactor with a novel spiral lifter according to claim 1, characterized in that: The ratio of the pitch of the spiral lifter to the length of the spiral lifter is 0.1-0.

4.

6. The ultra-gravity reactor with a novel spiral lifter according to claim 1, characterized in that: The ratio of the diameter of the support column of the spiral lifter to the diameter of the lifting cavity is 0.1-0.

4.

7. The ultra-gravity reactor with a novel spiral lifter according to claim 1, characterized in that: The impeller of the spiral lift is of paddle type, propeller type, turbine type or anchor type.

8. The ultra-gravity reactor with a novel spiral lifter according to claim 1, characterized in that: The impeller has an inclination angle of 5-85°; Preferably, the length of the impeller is 0.3-3 times the diameter of the lifting cavity, and the width of the impeller is 0.05-0.3 times the length of the impeller.

9. The ultra-gravity reactor with a novel spiral lifter according to claim 1, characterized in that: The number of impellers of the spiral lift is 2-6 and they are evenly distributed at equal angles.

10. Application of the high gravity reactor with a novel spiral lifter as claimed in any one of claims 1 to 9 in a gas-liquid / gas-liquid-solid reaction system, characterized in that: The following steps are involved: S11, the raw materials and the catalyst are put into the supergravity reactor through the first feed port and the second feed port, the supergravity reactor is turned on, the temperature control jacket is opened to heat the materials, and the discharge port and the drain port are closed; S12, monitoring the reaction pressure, and when the pressure in the reactor drops significantly, indicating that the reaction has begun, the discharge port is opened, and the raw materials are continuously introduced and the materials are continuously taken out; S13, after the reaction is finished, close the feed port, open the discharge port to slowly release the pressure, and after the pressure returns to normal pressure, open the drain port at the bottom of the kettle to remove the remaining liquid or solid-liquid material in the kettle.

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