Jet pump type mixed feeding device and reaction system
Through the design of the jet pump type mixing feeding device and reaction system, the problem of mixing gas-liquid solid-phase reactants is solved, and full mixing and efficient reactions are achieved within a wide range of viscosity, which is suitable for the chemical synthesis of diversified reactants.
Patent Information
- Application Number
- CN202420325639.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-21
- Publication Date
- 2024-12-13
- Estimated Expiration
- 2034-02-21
AI Technical Summary
The prior art is difficult to achieve uniform mixing of gas-liquid solid-phase reactants, especially under high viscosity and diversified reactants. The commonly used mechanical stirring and complex pipeline collision methods are inefficient and cannot meet the strict requirements of chemical synthesis for mixing. .
A jet pump type mixing feeding device is designed, including a high-pressure nozzle, a spherical mixing chamber and a discharge chamber. It combines a low-pressure phase pipeline and a venturi pipe to drive the mixing of high-pressure phase and low-pressure phase through a high-pressure nozzle, which is suitable for a wide range of viscosity. And add a gas-liquid separator and baffle to the reaction system to ensure sufficient mixing and reaction efficiency.
It realizes full mixing of gas-liquid phases within a wide viscosity range, including particulate reactants, simplifies the equipment structure, improves the mixing rate and conversion rate, and is suitable for the chemical synthesis of diversified reactants.
Smart Images
Figure CN222151950U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of jet pumps, and in particular relates to a jet pump type mixing feeding device and a reaction system. Background Art
[0002] In various kettles or continuous flow experiments, it is difficult to mix the three phases of gas, liquid and solid. It becomes more complicated if the conditions of anhydrous and oxygen are added. The commonly used mixing methods are generally mechanical stirring or complex pipeline collision. However, these mixing methods are greatly limited by the viscosity of the reactants. If the viscosity of the reactants is large, uniform mixing cannot be achieved through the commonly used mixing methods. And with the development of the field of chemical synthesis, the forms of reactants used in chemical synthesis tend to be diverse. Not only are there many types of gas-liquid-solid phase reactants, but the viscosity range of the liquid phase is also getting larger and larger. In order to obtain better products, the requirements for sufficient mixing of the reactants are becoming more and more stringent.
[0003] Therefore, there is an urgent need for a gas-liquid-solid reactant mixing device and a reaction system suitable for various viscosity ranges. Utility Model Content
[0004] In order to solve the deficiencies of the prior art, the purpose of the utility model is to provide a jet pump type mixing and feeding device and a reaction system. The device and reaction system provided by the utility model are suitable for gas-liquid mixing in a wide viscosity range and can contain granular reactants.
[0005] In order to achieve the above purpose, the technical solution of the utility model is:
[0006] The first aspect of the utility model provides a jet pump type mixing and feeding device, comprising a high-pressure nozzle, a mixing chamber and a discharge chamber connected in sequence, wherein the mixing chamber is a spherical structure, a low-pressure phase pipeline is connected to the mixing chamber, and the high-pressure phase pipeline is connected to the high-pressure nozzle.
[0007] In some embodiments of the present invention, two low-pressure phase pipelines are connected to the mixing chamber.
[0008] In some embodiments of the utility model, a connected throat pipe and a diffuser pipe are provided in the discharge chamber, and the throat pipe is arranged at the discharge chamber near the high-pressure nozzle end.
[0009] In some embodiments of the present invention, the throat-to-nozzle distance of the jet pump type mixing and feeding device is adjustable.
[0010] In some embodiments of the present invention, the jet pump type mixing and feeding device further comprises a venturi tube, and the venturi tube is connected to the end of the discharge chamber and is used for secondary mixing of the materials.
[0011] In some embodiments of the present utility model, the venturi tube comprises an inlet circular pipe section, a conical contraction section and a cylindrical throat section connected in sequence;
[0012] The end of the discharge cavity is connected to the inlet circular pipe section of the venturi tube.
[0013] The second aspect of the utility model provides a reaction system, comprising a high-pressure power phase storage tank, the above-mentioned jet pump type mixing and feeding device, and a reactor connected in sequence; the gas phase outlet of the reactor is connected to the high-pressure power phase storage tank through a booster pump; the liquid phase outlet of the reactor is connected to the low-pressure phase pipeline of the jet pump type mixing and feeding device through a low-pressure pump.
[0014] In some embodiments of the present invention, a gas-liquid separator is provided at the gas phase outlet of the reactor.
[0015] In some embodiments of the present invention, a baffle is provided in the reactor, and the baffle is arranged above the feed inlet of the reactor, and one end of the baffle is fixed above the feed inlet of the reactor, and the other end is tilted downward at a certain angle.
[0016] In some embodiments of the present invention, the high pressure power phase is a gas phase or a liquid phase reactant with low relative viscosity;
[0017] The low-pressure phase is a high-viscosity reactant or a viscous reactant containing a particulate catalyst.
[0018] The beneficial effects of the utility model are:
[0019] The utility model provides a jet pump type mixing and feeding device, comprising a high-pressure nozzle, a mixing chamber and a discharging chamber connected in sequence, wherein the mixing chamber is a spherical structure, a low-pressure phase pipeline is connected to the mixing chamber, and the high-pressure phase pipeline is connected to the high-pressure nozzle. The utility model uses the high-pressure nozzle to spray the high-pressure phase to drive the ejection phase for mixing. The jet pump is small in size, and the applicable viscosity range of the gas-liquid phase mixing is wide. The liquid can be mixed with granular solid catalysts and other substances. And the size of the high-pressure nozzle can be selected according to the viscosity of the ejection phase liquid, and the injection angle and atomization fineness as well as the size of the applicable solid reactant can be adjusted. The structure is simple and the mixing is more sufficient.
[0020] The utility model also provides a reaction system, which connects the jet pump type mixing and feeding device with the reactor. There are no moving parts during the connection, which ensures the sealing performance and simplifies the equipment structure. The booster pump can achieve stepless speed regulation, has a high circulation rate, accelerates the mixing rate of the high-pressure phase and the low-pressure phase, and improves the conversion rate. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] The drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.
[0022] Figure 1 This is a schematic diagram of the structure of the jet pump type mixing and feeding device of the utility model;
[0023] Figure 2 This is a schematic diagram of the structure of the jet pump type mixing and feeding device for secondary mixing through a venturi tube of the utility model;
[0024] Figure 3 This is a schematic diagram of the structure of a jet pump type mixing and feeding device for secondary mixing of three substances through a venturi tube in the utility model;
[0025] Figure 4 for Figure 3 The schematic diagram of the working process of the jet pump type mixing feeding device shown;
[0026] Figure 5 This is a structural diagram of the reaction system provided by the utility model.
[0027] Among them, 1: high-pressure nozzle, 2: mixing chamber, 3: discharge chamber, 4: low-pressure phase pipeline, 5: high-pressure phase pipeline, 6: throat, 7: diffusion tube, 8: venturi tube, 9: high-pressure power phase storage tank, 10: reactor, 11: booster pump, 12: low-pressure pump, 13: gas-liquid separator, 14: baffle, DETAILED DESCRIPTION
[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0029] The core of the utility model is to provide a jet pump type mixing and feeding device. When the jet pump type mixing and feeding device performs gas-liquid phase mixing, it is applicable to a wide viscosity range and can contain granular reactants.
[0030] Another core of the utility model is to provide a reaction system including the above-mentioned jet pump type mixing and feeding device.
[0031] Please refer to Figure 1The utility model provides a jet pump type mixing and feeding device, comprising a high-pressure nozzle 1, a mixing chamber 2 and a discharge chamber 3 connected in sequence, wherein the mixing chamber 2 is a spherical structure, a low-pressure phase pipeline 4 is connected to the mixing chamber 2, and a high-pressure phase pipeline 5 is connected to the high-pressure nozzle 1.
[0032] Specifically, the mixing chamber 2 is a spherical structure. Compared with a rectangular, square or cylindrical mixing chamber, the spherical mixing chamber 2 has no dead angle. After the high-pressure phase and the low-pressure phase are mixed in the mixing chamber 2, they directly enter the discharge chamber 3, and no residue is formed in the mixing chamber 2, saving materials. After the high-pressure phase reactants in the high-pressure pipeline 5 pass through the high-pressure nozzle 1, the high-pressure phase pressure energy is converted into high-speed kinetic energy. The high-kinetic energy phase reactants drive the low-pressure phase in the spherical mixing chamber 2 to enter the discharge chamber 3 through the nozzle, and the spherical mixing chamber 2 forms a vacuum, which will guide the low-pressure phase reactants to mix.
[0033] Specifically, the jet pump type mixing and feeding device is to mix two substances. One is a high-pressure reactant, which serves as a power phase (or a power source) and is ejected from a high-pressure nozzle 1 through a high-pressure phase pipeline 5. It is a gas phase or a liquid phase reactant with a relatively low viscosity. The other is a low-pressure reactant at normal pressure or slightly positive pressure, which serves as a drainage reactant and enters the mixing chamber 2 through a low-pressure phase pipeline 4. It can be a high-viscosity reactant or a viscous reactant containing a granular catalyst.
[0034] Specifically, the size of the high-pressure nozzle can be selected according to the viscosity of the ejection phase liquid, the injection angle and atomization fineness can be adjusted, and the size of the applicable solid reactant can be adjusted. The structure is simple and the mixing is more complete.
[0035] Optionally, the pressure of the high pressure reactant can reach 2 MPa.
[0036] Optionally, the viscosity of the low-pressure reactant may be selected from 10 mPa.s to 10000 mPa.s.
[0037] On the basis of the above embodiment, two low-pressure phase pipelines 4 are connected to the mixing chamber 2 .
[0038] Specifically, the jet pump type mixing feeding device can be divided into a single suction type, that is, a low-pressure phase pipeline 4 (such as Figure 2 As shown), and double suction type, that is, the mixing chamber 2 is connected to two low-pressure phase pipes 4 (as shown Figure 3As shown). The arrangement of multiple low-pressure phase pipelines 4 enables the jet pump type mixing and feeding device of the utility model to be applicable to a variety of reactions. When there are multiple reactants, multiple low-pressure phase pipelines 4 can be arranged, and the specific structure can be determined according to the specific test reaction. When the high-pressure phase reactant (i.e., the power flow) is sprayed at high speed to form a vacuum in the mixing chamber 2 of the spherical structure, the ejection ports of the two low-pressure phase pipelines 4 connected to the mixing chamber 2 of the spherical structure realize the mixing of the power flow, the ejection phase 1, and the ejection phase 2 in the discharge chamber 3 through the self-priming of the jet pump.
[0039] In addition, the types of low-pressure phase reactants in each low-pressure phase pipeline 4 may be the same or different, depending on the specific test reaction.
[0040] In addition, the flow rate of the low-pressure phase reactant in each low-pressure phase pipeline 4 can be determined according to the specific test reaction.
[0041] On the basis of the above-mentioned embodiment, a throat pipe 6 and a diffuser pipe 7 connected to each other are provided in the discharge chamber 3 , and the throat pipe 6 is arranged at the end of the discharge chamber 3 close to the high-pressure nozzle 1 .
[0042] Specifically, the discharge chamber 3 is provided with a connected throat pipe 6 and a diffusion pipe 7, and the high-pressure and low-pressure reactants are mixed in the throat pipe 6, and then enter the diffusion pipe 7 for mixing again to fully mix. The throat pipe 6 is directly connected to the mixing chamber 2, and there is no overlapping part between the two, that is, the throat pipe 6 is not inserted into the mixing chamber 2, avoiding the generation of dead angles, and facilitating the low-pressure phase material and the high-pressure phase material to directly enter the throat pipe 6 for mixing.
[0043] Optionally, the inner diameter of the throat 6 is gradually reduced, and a reducing throat can be added after the diffuser 7 when secondary mixing is required, such as Figure 2 shown.
[0044] Optionally, the diffuser 7 may be a trumpet-shaped structure. The inner diameter of the throat 6 gradually decreases, and the inner diameter of the part in contact with the diffuser 7 is the smallest. The diffuser 7 is a trumpet-shaped structure, and the inner diameter of the part in contact with the throat 6 is the smallest, and the inner diameter gradually decreases in the direction away from the throat 6.
[0045] On the basis of the above-mentioned embodiment, the throat-to-nozzle distance of the jet pump type mixing and feeding device is adjustable.
[0046] Specifically, the throat-to-nozzle distance is the distance from the high-pressure nozzle 1 to the cross section of the throat 6 in the discharge chamber 3. The throat-to-nozzle distance is a key factor affecting the performance of the jet pump type mixing and feeding device. The throat-to-nozzle distance has a greater influence on the ejection ratio of the jet pump type mixing and feeding device (the ejection ratio refers to the ratio of the mass flow rate of the ejection fluid to the mass flow rate of the main fluid, that is, the ratio of the mass flow rate of the low-pressure phase to the mass flow rate of the high-pressure phase). The ejection ratio first increases and then decreases with the increase of the throat-to-nozzle distance. The throat-to-nozzle distance and the ejection ratio in the utility model can be determined according to specific test reactions.
[0047] like Figure 2 As shown, based on the above embodiment, the jet pump type mixing and feeding device further includes a venturi tube 8, and the venturi tube 8 is connected to the end of the discharge chamber 3 for secondary mixing of the materials.
[0048] Specifically, the jet pump type mixing and feeding device can achieve the mixing of multiple reactants. If the mixing degree is not enough, a venturi tube 8 can be set at the end of the discharge chamber 3 for secondary mixing, and the materials are fully mixed and uniform through the venturi effect to improve the mixing degree to achieve the requirement of full mixing.
[0049] On the basis of the above embodiment, the venturi tube 8 comprises an inlet circular pipe section, a conical contraction section and a cylindrical throat section (not shown in the figure) connected in sequence;
[0050] The end of the discharge chamber 8 is connected to the inlet circular pipe section of the venturi tube 8 .
[0051] In summary, the utility model provides a jet pump type mixing and feeding device suitable for a wide range of viscosities. The principle of the jet pump type mixing and feeding device is based on the Venturi tube principle, which is an upgraded version of the reactor. This reactor has a simple structure and more complete mixing, and is suitable for gas-liquid mixing, especially high viscosity or even granular liquid reactions.
[0052] Please refer to Figure 5 The utility model provides a reaction system, comprising a high-pressure power phase storage tank 9, the above-mentioned jet pump type mixing and feeding device, and a reactor 10 connected in sequence; the gas phase outlet of the reactor is connected to the high-pressure power phase storage tank 9 through a booster pump 11; the liquid phase outlet of the reactor is connected to the low-pressure phase pipeline 4 of the jet pump type mixing and feeding device through a low-pressure pump 12.
[0053] Specifically, the jet pump type mixing and feeding device is connected to the reactor 10, and there are no moving parts during the connection, which ensures the sealing and simplifies the equipment structure. The booster pump 11 can achieve stepless speed regulation and high circulation rate, which accelerates the mixing rate of the high-pressure phase and the low-pressure phase and improves the conversion rate of the reactants.
[0054] Specifically, the jet pump type mixing and feeding device is to mix two substances. One is a high-pressure reactant, which serves as a power phase (or a power source) and is ejected from a high-pressure nozzle 1 through a high-pressure phase pipeline 5. It is a gas phase or a liquid phase reactant with a relatively low viscosity. The other is a low-pressure reactant at normal pressure or slightly positive pressure, which serves as a drainage reactant and enters the mixing chamber 2 through a low-pressure phase pipeline 4. It can be a high-viscosity reactant or a viscous reactant containing a granular catalyst.
[0055] The reactants of the power source are pressurized to the high-pressure power phase storage tank 9 by the booster pump 11, and then transported to the jet pump type mixing and feeding device through the pipeline. The low-pressure reactants are ejected through the bottom of the reactor 10 and the pipeline, or are pressurized and transported to the jet pump type mixing and feeding device by the low-pressure pump 12 for continuous reaction in a continuous cycle.
[0056] On the basis of the above embodiment, a gas phase outlet is provided at the top of the reactor 10, and a gas-liquid separator 13 is provided at the gas phase outlet.
[0057] Specifically, a gas-liquid separator 13 is provided on the top of the reactor 10, and the gas inside the reactor 10 is separated into gas and liquid, and the separated liquid phase re-enters the reactor 10 to continue the reaction, and the separated gas phase is pressurized by the booster pump 11 and stored in the high-pressure power phase storage tank 9. The provision of the gas-liquid separator 13 prevents the liquid phase reactant from entering the booster pump 11, prevents the booster pump 11 from being corroded, and improves the service life of the booster pump 11.
[0058] On the basis of the above embodiment, a baffle 14 is provided in the reactor 10, and the baffle 14 is arranged above the feed port of the reactor 10, that is, above the contact portion between the jet pump type mixing and feeding device and the reactor 10, and one end of the baffle 14 is fixed above the feed port of the reactor 10, and the other end is tilted downward at a certain angle.
[0059] Specifically, the baffle 14 is provided to prevent the gas phase reactants in the mixed material delivered by the jet pump type mixing and feeding device from being directly separated from the mixed material, thereby improving the reaction efficiency. One end of the baffle 14 is tilted downward at a certain angle, which can be selected to be 30°-60°. At this angle, most of the gas phase reactants can be intercepted, thereby improving the reaction efficiency of the mixed material.
[0060] On the basis of the above embodiment, the high pressure power phase is a gas phase or a liquid phase reactant with low relative viscosity;
[0061] The low-pressure phase is a high-viscosity reactant or a viscous reactant containing a particulate catalyst.
[0062] In some embodiments, the present invention provides a reaction method used in conjunction with the above-mentioned reaction system, comprising the following steps:
[0063] Step 1: Evacuate the reactor 10 and introduce the reaction solution into the reactor 10 through pipelines and valves.
[0064] Step 2: The gas is introduced into the high-pressure power phase storage tank 9 to keep the entire reaction system at a stable pressure. If it is a flammable and explosive gas, nitrogen can be added for dilution to achieve a safety purpose. The reaction gas can be introduced into one or more according to specific requirements.
[0065] Step 3: The booster pump 11 and the low-pressure pump 12 operate normally, so that the entire system reaches a stable equilibrium state. Then the reactor 10 is heated through the jacket to maintain a suitable reaction temperature so that the reaction continues. After the reaction is completed, the resulting reactants are discharged from the reactor 10.
[0066] Step 4: Pump new reaction liquid into the reactor 10 by means of a pump or evacuate the reactor according to step 1 to absorb the reaction liquid by pressure difference, and continue the reaction.
[0067] Maintenance of the reaction device: The cleaning liquid can be repeatedly circulated by a pump to clean the reactor 10. After cleaning, the liquid is discharged from the bottom discharge valve of the reactor 10. If the viscosity of the reactant is large, the heating jacket can be used to accelerate the dissolution and increase the cleaning speed.
[0068] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.
Claims
1. A jet pump type mixing and feeding device, comprising a high pressure nozzle, a mixing chamber and a discharge chamber connected in sequence, characterized in that: The mixing chamber is a spherical structure, a low-pressure phase pipeline is connected to the mixing chamber, and a high-pressure phase pipeline is connected to the high-pressure nozzle.
2. The jet pump type mixing and feeding device according to claim 1, characterized in that: The mixing chamber is connected with two low-pressure phase pipelines.
3. The jet pump type mixing and feeding device according to claim 1, characterized in that: A connected throat pipe and a diffuser pipe are arranged in the discharge cavity, and the throat pipe is arranged at the discharge cavity near the high-pressure nozzle end.
4. The jet pump type mixing and feeding device according to claim 1, characterized in that: The throat-to-nozzle distance of the jet pump type mixing and feeding device is adjustable.
5. The jet pump type mixing and feeding device according to claim 1, characterized in that: The jet pump type mixing and feeding device further comprises a venturi tube, which is connected to the end of the discharge chamber and is used for secondary mixing of the materials.
6. The jet pump type mixing and feeding device according to claim 5, characterized in that: The venturi tube comprises an inlet circular pipe section, a conical contraction section and a cylindrical throat section which are connected in sequence; The end of the discharge cavity is connected to the inlet circular pipe section of the venturi tube.
7. A reaction system, characterized in that: It comprises a high-pressure power phase storage tank, a jet pump type mixing and feeding device as described in any one of claims 1 to 6, and a reactor connected in sequence; the gas phase outlet of the reactor is connected to the high-pressure power phase storage tank through a booster pump; the liquid phase outlet of the reactor is connected to the low-pressure phase pipeline of the jet pump type mixing and feeding device through a low-pressure pump.
8. The reaction system according to claim 7, characterized in that A gas-liquid separator is provided at the gas phase outlet of the reactor.
9. The reaction system according to claim 7, characterized in that A baffle is provided in the reactor, and the baffle is arranged above the feed inlet of the reactor, and one end of the baffle is fixed above the feed inlet of the reactor, and the other end is inclined downward at a certain angle.
10. The reaction system according to claim 7, characterized in that The high-pressure dynamic phase is a gas phase or a liquid phase reactant with low relative viscosity; The low-pressure phase is a high-viscosity reactant or a viscous reactant containing a particulate catalyst.