A continuous operation reaction kettle gas-liquid solid phase kettle outer self-circulation reaction device

Abstract

The utility model provides a kind of continuous operation reaction kettle gas-liquid solid phase kettle outer self-circulation reaction device, including reaction kettle, and the inlet and outlet are equipped on reaction kettle, and the outside of reaction kettle is equipped with venturi tube subassembly, and venturi tube subassembly includes sequentially connected inlet section, contraction section, throat and diffusion section, and the inlet end of inlet section is communicated with outlet by pipeline, and the outlet end of diffusion section is communicated with inlet by pipeline, and gas inlet is equipped on throat.The utility model utilizes the special structure of venturi tube subassembly, when solid-liquid mixture passes through venturi tube subassembly, due to cross section gradually contracts, solid-liquid mixture speed increases, pressure reduces, gas is introduced at throat at this time, gas is inhaled in low pressure area and fully mixed with solid-liquid mixture, not only improve the solubility of gas, also enhance the contact area between gas-liquid solid three phases, improve mixing dispersion effect, improve mass transfer and heat transfer efficiency;Belong to chemical equipment technical field.

Description

Technical Field

[0001] This utility model relates to the field of chemical equipment technology, and in particular to a self-circulating reaction device for a continuously operating gas-liquid-solid phase reactor. Background Technology

[0002] In chemical production, chemical reactions involving gas, liquid, and solid phases (such as hydrogenation, oxidation, catalytic cracking, Fischer-Tropsch synthesis, bio-fermentation, hydrometallurgy, crystallization, and polymerization) are very common and have significant industrial value. The core equipment for realizing these reactions is typically a continuously operating reactor. Compared to batch operation, continuous operation offers significant advantages such as higher production efficiency, more stable product quality, easier automation, and relatively lower energy consumption, making it particularly suitable for large-scale industrial production. Therefore, continuously operating reactors are widely used in gas-liquid-solid three-phase reaction processes.

[0003] The large density differences between the gas, liquid, and solid phases make it difficult for traditional mechanically stirred reactors to achieve uniform dispersion and sufficient contact between the three phases. Solid particles tend to settle or float, and gas may short-circuit, limiting the reaction rate to mass transfer efficiency and resulting in low utilization of catalysts or solid reactants. To ensure the uniformity and efficiency of the reaction, forced circulation or external pumping is usually required to achieve thorough mixing of materials. However, these methods often suffer from high energy consumption, complex equipment, and high maintenance costs. Alternatively, an external self-circulation structure can be used, where the reaction liquid (or slurry) is pumped out of the reactor, cooled / heated by an external heat exchanger, and then circulated back into the reactor. While this method solves the problem to some extent, there is still room for improvement in mixing efficiency and energy utilization. Based on the above issues, this application designs a continuously operating gas-liquid-solid phase external self-circulation reactor. Utility Model Content

[0004] The purpose of this application is to provide a continuously operating gas-liquid-solid phase external self-circulating reaction device, which aims to solve the technical problems of complex equipment and poor mixing effect in existing gas-liquid-solid three-phase dispersion methods.

[0005] To achieve the above objectives, the technical solution adopted in this application is as follows: a continuously operating gas-liquid-solid phase reactor external self-circulating reaction device is provided, including a reactor, the reactor being provided with an inlet and an outlet, a Venturi tube assembly being provided on the outside of the reactor, the Venturi tube assembly including an inlet section, a contraction section, a throat and a diffusion section connected in sequence, the inlet end of the inlet section being connected to the outlet through a pipeline, the outlet end of the diffusion section being connected to the inlet through a pipeline, and a gas inlet being provided on the throat.

[0006] In one embodiment, a circulating pump is connected to the reactor, the inlet of the circulating pump is connected to the outlet through a pipeline, and the outlet of the circulating pump is connected to the inlet of the inlet section through a pipeline.

[0007] In one embodiment, a solid disperser is connected between the outlet end of the circulating pump and the inlet end of the inlet section.

[0008] In one embodiment, a heat exchanger is connected between the outlet end of the diffusion section and the feed inlet. A heat exchange medium is provided on the outside of the heat exchanger, and the heat exchange medium and the heat exchanger form a circulation path. A solenoid valve is provided at the outlet end of the heat exchange medium.

[0009] In one embodiment, a temperature sensor and a pressure sensor are provided on the pipeline between the outlet end of the heat exchanger and the inlet.

[0010] In one embodiment, the reactor is further provided with a gas outlet, which is connected to the gas inlet via a pipeline, and the inlet end of the gas inlet is provided with a flow control valve.

[0011] In one embodiment, the reactor is further provided with a solid inlet and a liquid inlet.

[0012] In one embodiment, a discharge valve is also provided on the discharge port.

[0013] This invention provides a self-circulating reaction device for a continuously operating gas-liquid-solid phase reactor. Compared with the prior art, its advantages are as follows: By setting a Venturi tube assembly on the outside of the reactor, and utilizing the special structure of the Venturi tube assembly, when the solid-liquid mixture passes through the Venturi tube assembly, the cross-section gradually contracts, increasing the velocity of the solid-liquid mixture and decreasing the pressure. At this time, gas is introduced at the throat, and the gas is drawn in in the low-pressure zone and fully mixed with the solid-liquid mixture. This not only improves the solubility of the gas but also enhances the contact area between the gas, liquid, and solid phases, allowing the three phases to fully contact each other during high-speed flow, improving the mixing and dispersion effect, and increasing the mass and heat transfer efficiency. In addition, due to the pressure difference generated by the Venturi tube assembly, the gas-liquid-solid mixture automatically returns to the inside of the reactor under the pressure rise in the diffusion section, forming a self-circulation. It does not require external pumping to return it to the reactor, simplifying the structure, reducing costs, and making it simple and highly practical. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 A schematic diagram of the structure of a continuously operating gas-liquid-solid phase reactor external self-circulating reaction device provided in an embodiment of this application; Figure 2 for Figure 1 The diagram shows an enlarged structural schematic of the Chinese Tubular tube assembly in the continuously operating gas-liquid-solid phase reactor external self-circulating reaction device.

[0016] Explanation of symbols in the diagram: 1. Reactor; 101. Inlet; 102. Outlet; 103. Solid inlet; 104. Liquid inlet; 105. Gas outlet; 2. Venturi tube assembly; 201. Inlet section; 202. Contraction section; 203. Throat; 204. Diffusion section; 3. Piping; 4. Gas inlet; 5. Circulating pump; 6. Solid disperser; 7. Heat exchanger; 8. Heat exchange medium; 9. Solenoid valve; 10. Pressure sensor; 11. Temperature sensor; 12. Flow control valve; 13. Discharge valve. Detailed Implementation

[0017] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0018] It should be noted that when a component is referred to as being "fixed" or "set" to another component, it can be directly or indirectly attached to that other component. When a component is referred to as being "connected" to another component, it can be directly or indirectly connected to that other component.

[0019] It should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and should not be construed as indicating or implying that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. Furthermore, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0020] Please see Figure 1 This is a schematic diagram of a continuously operating gas-liquid-solid phase reactor external self-circulating reaction device according to an embodiment of this application. For ease of explanation, only the parts relevant to this embodiment are shown, which are described in detail below: In one embodiment, a continuously operating gas-liquid-solid phase reactor external self-circulating reaction device includes a reactor 1, which has an inlet 101 and an outlet 102. A Venturi tube assembly 2 is provided on the outside of the reactor 1. The Venturi tube assembly 2 includes an inlet section 201, a contraction section 202, a throat 203 and a diffusion section 204 connected in sequence. The inlet end of the inlet section 201 is connected to the outlet 102 through a pipe 3. The outlet end of the diffusion section 204 is connected to the inlet 101 through a pipe 3. A gas inlet 4 is provided on the throat 203.

[0021] By installing a Venturi tube assembly 2 on the outside of the reactor 1, and utilizing the special structure of the Venturi tube assembly 2, when the solid-liquid mixture passes through the Venturi tube assembly 2, the velocity of the solid-liquid mixture increases and the pressure decreases due to the gradual contraction of the cross-section. At this time, gas is introduced at the throat 203. The gas is drawn in in the low-pressure zone and fully mixed with the solid-liquid mixture. This not only improves the solubility of the gas, but also enhances the contact area between the gas, liquid, and solid phases, allowing the gas, liquid, and solid phases to fully contact each other during high-speed flow, improving the mixing and dispersion effect, and improving the mass and heat transfer efficiency. In addition, due to the pressure difference generated by the Venturi tube assembly 2, the gas, liquid, and solid mixture automatically returns to the reactor 1 under the pressure rise of the diffusion section 204, forming a self-circulation. It does not require external pumping to return to the reactor 1, simplifying the structure, reducing costs, and making it simple and highly practical.

[0022] For details, please refer to Figure 1 The reactor 1 is also equipped with a solid inlet 103 and a liquid inlet 104. The solid inlet 103 and the liquid inlet 104 are used to introduce solid raw materials and liquid raw materials into the reactor 1, respectively.

[0023] Please see Figure 1The reactor 1 is also equipped with a gas outlet 105, which is connected to the gas inlet 4 via a pipe 3. A flow control valve 12 is installed at the inlet end of the gas inlet 4. The gas inlet 4 is used to introduce inert gas or reactive gas to enhance the mixing effect of the gas-liquid-solid three phases. The flow control valve 12 is used to control the gas flow rate.

[0024] In one embodiment, please refer to Figure 1 A circulation pump 5 is connected to the reactor 1. The inlet of the circulation pump 5 is connected to the outlet 102 via pipe 3, and the outlet of the circulation pump 5 is connected to the inlet of the inlet section 201 via pipe 3. The main function of the circulation pump 5 is to provide the power for the circulation of the solid-liquid mixture, ensuring that the material can smoothly enter the venturi tube assembly 2.

[0025] In one embodiment, please refer to Figure 1 A solid disperser 6 is connected between the outlet end of the circulating pump 5 and the inlet end of the inlet section 201. The solid disperser 6 evenly disperses solid particles into the liquid, preventing clogging and improving the mixing effect. The solid disperser 6 can be a mixer, a stirrer, a homogenizer, or other mixing and dispersing equipment, and can be purchased directly from the market as a finished product.

[0026] In one embodiment, please refer to Figure 1 A heat exchanger 7 is connected between the outlet end of the diffuser section 204 and the feed inlet 101. The heat exchanger 7 is used to control the temperature of the gas-liquid-solid three-phase mixture, that is, to control the reaction temperature and ensure stable reaction conditions.

[0027] In one embodiment, please refer to Figure 1 The heat exchanger 7 has a heat exchange medium 8 on its outer side, which forms a circulation path with the heat exchanger 7. A solenoid valve 9 is provided at the outlet of the heat exchange medium 8. The heat exchanger 7 transfers heat through the circulation of the heat exchange medium 8. The solenoid valve 9 is used to control the flow of the heat exchange medium 8. When the temperature of the gas-liquid-solid three-phase mixture is too high or too low, the flow of the heat exchange medium 8 is controlled by the solenoid valve 9 to achieve heat exchange.

[0028] In one embodiment, please refer to Figure 1 A temperature sensor 11 and a pressure sensor 10 are installed on the pipeline 3 between the outlet end of heat exchanger 7 and the inlet 101. The main function of temperature sensor 11 is to measure the temperature of the gas-liquid-solid three-phase mixture and transmit the temperature data to the control system. The control system controls the flow of heat exchange medium 8 through solenoid valve 9 to regulate the temperature of the gas-liquid-solid three-phase mixture and ensure stable reaction conditions. Pressure sensor 10 is mainly used to measure the pressure of the gas-liquid-solid three-phase mixture and transmit the pressure data to the control system, thereby realizing pressure monitoring.

[0029] In one embodiment, the continuously operating gas-liquid-solid phase reactor external self-circulating reaction device also includes a control system, which is electrically connected to the solenoid valve 9, the pressure sensor 10, the temperature sensor 11, and the flow control valve 12.

[0030] In one embodiment, please refer to Figure 1 The discharge port 102 is also equipped with a discharge valve 13, which is used to discharge the reaction product from the reactor 1.

[0031] The following combination Figures 1-2 The working process of the continuously operating gas-liquid-solid phase reactor external self-circulating reaction device of this application is described as follows: Before use, solid raw materials and liquid raw materials are introduced into the reactor 1 through solid inlet 103 and liquid inlet 104, and the solid raw materials and liquid raw materials form a solid-liquid mixture in the reactor 1; Turn on the circulation pump 5 and the solid disperser 6. The solid-liquid mixture in the reactor 1 is transported into the pipeline 3 through the outlet 102. After being uniformly dispersed by the solid disperser 6, it is transported to the inlet section 201 of the venturi tube assembly 2. When the solid-liquid mixture flows through the contraction section 202, the velocity of the solid-liquid mixture increases and the pressure decreases due to the gradual contraction of the cross section. At this time, gas is introduced through the gas inlet 4 at the throat 203. The gas is drawn in at the low pressure zone and fully mixed with the solid-liquid mixture to form a gas-liquid-solid three-phase mixture. When the gas-liquid-solid three-phase mixture flows into the diffusion section 204, under the action of the pressure rebound in the diffusion section 204, the gas-liquid-solid three-phase mixture automatically returns to the inside of the reactor 1 through the feed inlet 101, forming a self-circulation. Before the gas-liquid-solid three-phase mixture is automatically returned to reactor 1, it will pass through heat exchanger 7 for heat transfer to reach the reaction temperature and ensure stable reaction conditions; this cycle is repeated to achieve continuous reaction of raw materials. During the continuous reaction, due to the low pressure at the throat 203, the gas in the reactor 1 will be drawn into the gas inlet 4 through the gas outlet 105 and enter the throat 203 to mix thoroughly with the solid-liquid mixture. During the continuous reaction process, the circulation flow rate and mixing intensity can be precisely controlled by adjusting the power of the circulation pump 5 and regulating the gas injection amount through the flow control valve 12.

[0032] In summary, this invention provides a self-circulating reaction device for a continuously operating gas-liquid-solid phase reactor. By installing a Venturi tube assembly on the outside of the reactor, and utilizing the special structure of the Venturi tube assembly, when the solid-liquid mixture passes through the assembly, the cross-section gradually contracts, increasing the velocity of the mixture and decreasing the pressure. At this point, gas is introduced at the throat, and the gas is drawn in at the low pressure zone and thoroughly mixed with the solid-liquid mixture. This not only improves the solubility of the gas but also enhances the contact area between the gas, liquid, and solid phases, allowing for full contact during high-speed flow, improving mixing and dispersion, and increasing mass and heat transfer efficiency. Furthermore, due to the pressure difference generated by the Venturi tube assembly, the gas-liquid-solid mixture automatically returns to the reactor interior under the pressure rise in the diffusion section, forming a self-circulation. This eliminates the need for external pumping, simplifying the structure, reducing costs, and offering high practicality. This invention can be widely applied in the field of chemical equipment technology.

[0033] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. A continuously operating gas-liquid-solid phase reactor external self-circulating reaction device, comprising a reactor (1), wherein the reactor (1) is provided with a feed inlet (101) and a discharge outlet (102), characterized in that, The reactor (1) is provided with a Venturi tube assembly (2) on its outer side. The Venturi tube assembly (2) includes an inlet section (201), a contraction section (202), a throat (203) and a diffusion section (204) connected in sequence. The inlet end of the inlet section (201) is connected to the outlet (102) through a pipe (3). The outlet end of the diffusion section (204) is connected to the feed inlet (101) through a pipe (3). A gas inlet (4) is provided on the throat (203).

2. The continuously operating gas-liquid-solid phase reactor external self-circulating reaction device as described in claim 1, characterized in that, The reactor (1) is connected to a circulating pump (5). The inlet end of the circulating pump (5) is connected to the outlet (102) through a pipeline (3), and the outlet end of the circulating pump (5) is connected to the inlet end of the inlet section (201) through a pipeline (3).

3. The continuously operating gas-liquid-solid phase reactor external self-circulating reaction device as described in claim 2, characterized in that, A solid disperser (6) is connected between the outlet end of the circulating pump (5) and the inlet end of the inlet section (201).

4. The continuously operating gas-liquid-solid phase reactor external self-circulating reaction device as described in claim 1, characterized in that, A heat exchanger (7) is connected between the outlet end of the diffusion section (204) and the inlet (101). A heat exchange medium (8) is provided on the outside of the heat exchanger (7). The heat exchange medium (8) and the heat exchanger (7) form a circulation path. A solenoid valve (9) is provided at the outlet end of the heat exchange medium (8).

5. The continuously operating gas-liquid-solid phase reactor external self-circulating reaction device as described in claim 4, characterized in that, A temperature sensor (11) and a pressure sensor (10) are provided on the pipeline (3) between the outlet end of the heat exchanger (7) and the inlet (101).

6. The continuously operating gas-liquid-solid phase reactor external self-circulating reaction device as described in claim 1, characterized in that, The reactor (1) is also provided with a gas outlet (105), which is connected to the gas inlet (4) through a pipeline (3). The inlet end of the gas inlet (4) is provided with a flow control valve (12).

7. The continuously operating gas-liquid-solid phase reactor external self-circulating reaction device as described in claim 1, characterized in that, The reactor (1) is also provided with a solid inlet (103) and a liquid inlet (104).

8. The continuously operating gas-liquid-solid phase reactor external self-circulating reaction device as described in claim 1, characterized in that, The discharge port (102) is also equipped with a discharge valve (13).

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