A continuous venturi type solid-liquid reaction device

Abstract

The application belongs to the technical field of chemical equipment and discloses a continuous Venturi type solid-liquid reaction device, which comprises a reaction kettle, a Venturi ejector, a circulating loop one and a solid bin, the Venturi ejector is fixedly connected to the upper portion of the reaction kettle, the feed inlet of the Venturi ejector is higher than the discharge outlet of the Venturi ejector, and the diffusion section of the Venturi ejector extends into the inside of the reaction kettle; the feed end of the circulating loop one is communicated with the reaction kettle, the discharge end of the circulating loop one is communicated with the throat pipe of the Venturi ejector, and the discharge outlet of the solid bin is communicated with the circulating loop one. Through the cooperation of the Venturi ejector and the circulating loop one, the main fluid flow pattern is prevented from being destroyed when the solid-phase material directly enters the throat pipe position, the main fluid flow rate is reduced, the possibility that the solid-phase material adheres to the inner wall of the throat pipe to block the throat pipe is reduced, the solid-phase material continuously and uninterruptedly enters the system, and the production efficiency is improved.

Description

Technical Field

[0001] This application belongs to the field of chemical equipment technology and relates to a reaction vessel, specifically a continuous Venturi solid-liquid reaction device. Background Technology

[0002] Lithium difluorooxalate borate can be used in lithium battery electrolytes as a film-forming additive or to replace lithium hexafluorophosphate (LiPF6) as a conductive salt. It can broaden the battery's operating temperature range, improve the electrolyte's conductivity, and enhance the battery's cycle performance and rate performance over a wide temperature range by forming a good solid electrolyte interphase (SEI) film, thereby improving the overall performance of the battery.

[0003] In existing technologies, sodium oxalate is typically prepared by reacting it with chlorosilanes to produce silicone oxalate grease. Then, lithium difluorooxalate borate is obtained by reacting the silicone oxalate grease with lithium tetrafluoroborate. The reaction between silicone oxalate grease and lithium tetrafluoroborate is highly exothermic and rapid. If a batch reactor is used, precise temperature control is impossible. Therefore, a common production process is a semi-batch reactor dropwise addition reaction, where the solid is added in batches. The fluorosilanes generated in the gas phase wet the hopper, causing severe adhesion to the feed pipe and even material blockage. This results in low production efficiency and frequent equipment disassembly and maintenance. Another production method involves pre-mixing lithium tetrafluoroborate with a solvent, followed by adding the liquid slurry to the reaction system. This process is relatively mild, but the slurrying process is cumbersome, and the solid feed pipe also suffers from adhesion to the walls and blockage. Utility Model Content

[0004] To address the aforementioned problems, this invention provides a continuous Venturi solid-liquid reaction apparatus.

[0005] A continuous Venturi solid-liquid reaction apparatus includes a reaction vessel, a Venturi ejector, a first circulation loop, and a solids chamber. The Venturi ejector is fixedly connected to the upper part of the reaction vessel, with its inlet higher than its outlet, and its diffuser extending into the interior of the reaction vessel. The inlet of the first circulation loop is connected to the lower part of the reaction vessel, and its outlet is connected to the throat of the Venturi ejector. The outlet of the solids chamber is connected to the first circulation loop.

[0006] When using a continuous Venturi solid-liquid reactor, a certain amount of liquid material is first injected into the reactor. Then, the liquid material in the reactor is drawn into the first circulation loop by the negative pressure of the Venturi ejector. At the same time, the solid chamber is opened, allowing the solid material to enter the first circulation loop. In the first circulation loop, the solid and liquid materials are initially mixed. Then, they enter the throat of the Venturi ejector for secondary mixing. This avoids the solid material from disrupting the main fluid flow pattern when it directly enters the throat, reduces the main fluid velocity, and reduces the possibility of the solid material adhering to the inner wall of the throat and clogging it. The negative pressure generated by the Venturi ejector forms a dual feeding driving force of negative pressure and gravity, which allows the solid material to continuously and uninterruptedly enter the system, improving production efficiency.

[0007] Preferably, a discharge pipe is fixedly connected and communicated with the discharge port of the solid silo, and the discharge pipe is connected to the first circulation loop; an anti-sludge component is provided at the intersection of the discharge pipe and the first circulation loop.

[0008] Preferably, the anti-sludge component includes an anti-sludge rod, which is oscillatingly disposed at the junction of the feed pipe and the first circulation loop, and the anti-sludge rod can oscillate up and down along the height direction of the feed pipe.

[0009] The solid material in the feed pipe and the liquid material in the first circulation loop mix at the interface to form lumpy material, which can easily clog the feed pipe and affect feeding. By setting up an anti-clogging rod that swings up and down to impact the lumpy material, the possibility of clogging the feed pipe can be reduced.

[0010] Preferably, one end of the anti-sludge rod is hinged to the junction of the feed pipe and the first circulation loop, and the hinged end and the movable end of the anti-sludge rod are arranged along the material flow direction of the feed pipe; the anti-sludge assembly further includes an arc-shaped plate, which is arranged at the movable end of the anti-sludge rod, and the hinged end of the anti-sludge rod and the concave surface of the arc-shaped plate are arranged sequentially along the material flow direction in the first circulation loop.

[0011] The solid material in the feed pipe acts downward on the anti-sludge rod, while the liquid material in the first circulation loop impacts the arc plate, thereby driving the anti-sludge rod to move upward. The solid material and liquid material flow exert force on the anti-sludge rod in different directions, causing the anti-sludge rod to swing at the intersection of the feed pipe and the first circulation loop, impacting the blocky material, thereby reducing the possibility of the feed pipe being blocked.

[0012] Preferably, a baffle is provided at the junction of the feed pipe and the first circulation loop, the baffle is arranged parallel to the material flow direction of the first circulation loop, and the baffle is located below the hinged end of the anti-sludge rod.

[0013] Preferably, the anti-sludge assembly further includes a swing drive for driving the anti-sludge rod to swing, the swing drive including a swing hydraulic cylinder, the output shaft of the swing hydraulic cylinder being fixedly connected to the anti-sludge rod.

[0014] Preferably, the anti-sludge component includes a spiral blade, which is rotatably disposed at the discharge end of the feed pipe.

[0015] Preferably, the feeding pipe is provided with an installation structure for mounting the spiral blade. The installation structure includes an installation ring and multiple connecting ribs. The installation ring is fixedly connected to the feeding pipe through the multiple connecting ribs, and the rotating shaft of the spiral blade is rotatably connected to the installation ring.

[0016] Preferably, the feed pipe is provided with a drive structure for driving the spiral blades to rotate.

[0017] To prevent lumpy materials from clogging the discharge pipe when the solid silo is discharging, a spiral blade can be installed at the discharge end of the discharge pipe. The rotating spiral blade will transport the material in the solid silo to the first circulation loop.

[0018] Preferably, the throat of the venturi injector is provided with a columnar boss, and multiple feed ports are evenly distributed along the circumferential direction of the throat, and all of the multiple feed ports are connected to the circulation loop.

[0019] Multiple feed inlets are evenly distributed circumferentially along the throat, ensuring uniform material flow from circulation loop one. The collision and interweaving of material flows from different directions significantly enhances mixing, improving reaction uniformity and efficiency, and facilitating subsequent thorough mixing and reaction with other fluids. Uniform feeding and effective mixing help maintain reaction stability, reducing problems such as localized overheating and slow reaction times caused by uneven material distribution. This allows the reactor to operate stably and reliably, minimizing fluctuations and risks during operation.

[0020] Preferably, a baffle is provided at the bottom of the reactor.

[0021] Preferably, the baffle ring is arranged in a circular shape, the outer diameter of the baffle is the same as the inner diameter of the reactor, and the outer ring of the baffle is fixedly connected to the inner wall of the reactor; the inner ring of the baffle is higher than or equal to the outer ring of the baffle.

[0022] By setting up baffles, the density difference between solid and liquid materials is used to prevent unreacted solid materials from entering the first circulation loop, thereby reducing the solid content of the materials entering the first circulation loop. This reduces the possibility of the Venturi injector's throat sticking to the wall and becoming clogged, eliminating the need for a backwash filter.

[0023] Preferably, the bottom end of the Venturi injector is located below the diverging end of the baffle.

[0024] Preferably, it further includes a second circulation loop, the feed end of which is connected to the reactor, and the discharge end of which is connected to the feed inlet of the Venturi injector; a circulation pump and a heat exchanger are sequentially arranged in the second circulation loop along the material flow direction.

[0025] When the continuous Venturi reactor is working, the circulating pump extracts the mixture from the reactor, processes it through the heat exchanger, and then delivers it to the Venturi ejector. Through the cooperation of circulation loop one and circulation loop two, the feed flow rate can be adjusted in real time. The solid feeding process does not require precise control, and the operation is highly flexible.

[0026] Preferably, the reaction vessel is fixedly connected to and connected to an inlet pipe.

[0027] Preferably, a discharge pipe is provided on the first circulation loop, and the discharge pipe and the solid bin are arranged sequentially along the material flow direction in the first circulation loop.

[0028] Compared with the prior art, one or more technical solutions provided by the present invention have at least one of the following beneficial effects: (1) Through the cooperation of the Venturi injector and the first circulation loop, the solid and liquid materials are premixed in the pipeline of the first circulation loop to initially form a slurry. Then, they are mixed again at the throat of the Venturi injector to avoid the solid material from directly entering the throat and disrupting the flow pattern of the main fluid, reducing the flow rate of the main fluid, and reducing the possibility of the solid material adhering to the inner wall of the throat and clogging the throat. The Venturi injector generates negative pressure, forming a dual feeding driving force of negative pressure + gravity, which can make the solid material continuously enter the system and improve production efficiency.

[0029] (2) By controlling the baffle and residence time, the solid content in the material in the upper layer of the reactor is lower, so that the main phase of the material entering the circulation loop is liquid, reducing the possibility of solid feeding pipe sticking to the wall and clogging, and realizing continuous solid feeding without the need to add an extra backwash filter. Attached Figure Description

[0030] The accompanying drawings are provided to further understand this application and form part of the specification. They are used together with the embodiments of this application to explain this application and do not constitute a limitation thereof.

[0031] Figure 1 This is a schematic diagram of the overall structure of Example 1; Figure 2 This is a top view of the Venturi injector in Example 1; Figure 3 for Figure 1Enlarged structural diagram of region A in the middle; Figure 4 This is a partial structural diagram of the anti-siltation component in Example 3; Figure 5 This is a partial structural diagram of the baffle in Example 4; Figure 6 This is a partial structural diagram of the baffle fixing frame and filter screen in Example 5.

[0032] Labeling Explanation: 1. Reactor; 101. Inlet Pipe; 102. Outlet Pipe; 2. Venturi Jet; 21. Throat; 22. Feed Inlet; 3. Circulation Loop One; 4. Solids Bin; 41. Discharge Pipe; 42. Discharge Valve; 5. Circulation Loop Two; 51. Circulation Pump; 52. Heat Exchanger; 6. Anti-sludge Components; 61. Anti-sludge Rod; 62. Arc Plate; 63. Baffle; 64. Spiral Blade; 7. Baffle; 71. Fixing Frame; 711. Concentric Frame One; 712. Concentric Frame Two; 713. Connecting Rod; 72. Filter Screen; 8. Mounting Structure; 81. Mounting Ring; 82. Connecting Rib; 83. Drive Motor; 84. Bevel Gear Set; 841. Bevel Gear One; 842. Bevel Gear Two. Detailed Implementation

[0033] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0034] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the equipment or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0035] Example 1: A continuous Venturi solid-liquid reaction apparatus, referenced Figure 1The reactor includes a reactor 1, a Venturi injector 2, a first circulation loop 3, a solids chamber 4, and a second circulation loop 5. The Venturi injector 2 is fixedly connected to the upper part of the reactor 1 and is arranged parallel to the height direction of the reactor 1. The inlet of the Venturi injector 2 is higher than the outlet of the Venturi injector 2. In a specific embodiment of the present invention, the Venturi injector 2 is arranged along the height direction of the reactor 1, and the diffuser section of the Venturi injector 2 extends into the interior of the reactor 1. The throat 21 of the Venturi injector 2 is provided as a columnar boss, as shown in the figure. Figure 2 Multiple feed inlets 22 are evenly distributed along the circumferential direction of the throat 21. In this specific embodiment, four feed inlets 22 are provided. In other specific embodiments, six, eight, etc., feed inlets 22 can be provided, depending on actual needs. The throat 21 is provided with columnar protrusions, which increases the mixing space of the throat 21 and is conducive to the full mixing of liquid and solid materials in the throat 21.

[0036] The feed end of circulation loop 3 is connected to reactor 1, and the discharge end of circulation loop 3 is connected to the throat 21 of venturi injector 2. A discharge pipe 41 is provided at the discharge port of solids bin 4, and the discharge port of solids bin 4 is fixedly connected to the discharge pipe 41, and the two are connected. A discharge valve 42 is provided on the discharge pipe 41, and the discharge end of the discharge pipe 41 is connected to circulation loop 3. An anti-sludge component 6 is provided at the junction of the discharge pipe 41 and circulation loop 3.

[0037] Reference Figure 3 The anti-sludge component 6 includes an anti-sludge rod 61 and an arc-shaped plate 62. One end of the anti-sludge rod 61 is hinged to the intersection of the feed pipe 41 and the circulation loop 3, and the anti-sludge rod 61 can swing up and down along the height direction of the feed pipe 41. The arc-shaped plate 62 is fixedly connected to the other end of the anti-sludge rod 61, and the hinged end of the anti-sludge rod 61 and the convex surface of the arc-shaped plate 62 are arranged sequentially along the material flow direction of the circulation loop 3. A baffle plate 63 is provided at the intersection of the feed pipe 41 and the circulation loop 3. The baffle plate 63 is arranged parallel to the material flow direction of the circulation loop 3 and is located below the anti-sludge rod 61. The length of the baffle plate slightly exceeds the hinged part of the anti-sludge rod 61, so that the anti-sludge rod 61 swings upward under the action of the liquid phase material to impact the material in the feed pipe 41. The solid phase material in the feed pipe 41 and the liquid phase material in the circulation loop 3 mix at the interface to form lumpy material, which easily clogs the feed pipe 41 and affects the feeding. By setting up the anti-sludge component 6, the solid material in the feed pipe 41 and the liquid material in the circulation loop 3 act on the anti-sludge rod 61 in different directions, causing the anti-sludge rod 61 to swing up and down at the intersection of the feed pipe 41 and the circulation loop 3, impacting the blocky material, thereby reducing the possibility of blockage in the feed pipe 41.

[0038] In practical applications, the length of the anti-sludge rod 61 is less than the inner diameter of the feed pipe 41, increasing the swing range of the anti-sludge rod 61 and enhancing the anti-sludge effect. In order to increase the force of the liquid phase material in the circulation loop 3 on the arc plate 62, the position of the anti-sludge component 6 can be appropriately moved a certain distance below the feed pipe 41. An extension plate is fixed at the bottom of the feed pipe 41, and the anti-sludge component 6 is installed on the extension plate.

[0039] Reference Figure 1 A liquid inlet pipe 101 is fixedly connected to and connected to the reactor 1, through which liquid phase materials enter the reactor 1; a discharge pipe 102 is fixedly connected to and connected to the bottom of the reactor 1.

[0040] When using a continuous Venturi solid-liquid reactor, a certain amount of liquid material is first injected into the reactor 1 through the inlet pipe 101. Then, the Venturi ejector 2 is started. When the continuous Venturi solid-liquid reactor is working, the liquid level in the reactor 1 is higher than the feed end of the circulation loop 3. The negative pressure generated by the Venturi ejector 2 draws the liquid material in the reactor 1 into the circulation loop 3. At the same time, the solid chamber 4 is opened, allowing the solid material to enter the circulation loop 3. In the circulation loop 3, the solid and liquid materials are initially mixed, and then they enter the throat 21 of the Venturi ejector 2 for secondary mixing. This avoids the solid material directly entering the throat 21 and disrupting the main fluid flow pattern, reducing the main fluid velocity, and reducing the possibility of the solid material adhering to the inner wall of the throat 21 and clogging it. The negative pressure generated by the Venturi ejector 2 forms a dual feeding driving force of negative pressure and gravity, which allows the solid material to continuously and uninterruptedly enter the system, improving production efficiency.

[0041] A baffle 7 is installed at the bottom of the reactor 1. The baffle 7 is circular, with its outer diameter matching the inner diameter of the reactor 1. The outer ring of the baffle 7 is fixedly connected to the inner wall of the reactor 1. The inner ring of the baffle 7 is higher than its outer ring, and its diameter is smaller than that of its outer ring. In the mixture inside the reactor 1, solid materials generally settle at the bottom. By installing the baffle 7, solid materials are blocked, reducing the solid content of the material entering the circulation loop 3. This reduces the possibility of the venturi injector 2's throat 21 sticking to the wall and becoming clogged, eliminating the need for a backwash filter. The inclined arrangement of the baffle 7 helps buffer the material entering the reactor 1, improving the stability of the device.

[0042] The bottom of the Venturi injector 2 should be located below the inner diameter of the baffle 7. The mixed material is injected into the reactor 1 by the Venturi injector 2. The baffle 7 can reduce the degree of material splashing and improve the stability of the reactor 1.

[0043] The feed end of the second circulation loop 5 is connected to the reactor 1, and the feed end of the second circulation loop 5 is located below the baffle 7. The discharge end of the second circulation loop 5 is connected to the feed port of the Venturi injector 2. A circulation pump 51 and a heat exchanger 52 are arranged sequentially along the material flow direction in the second circulation loop 5.

[0044] When the continuous Venturi reactor is working, the circulating pump 51 extracts the mixture from the reactor 1, processes it through the heat exchanger 52, and then sends it to the Venturi ejector 2. Through the cooperation of the first circulation loop 3 and the second circulation loop 5, the flow rate of the feed can be adjusted in real time. The solid feed process does not require precise control and has great operational flexibility.

[0045] The working process of a continuous Venturi solid-liquid reaction apparatus is as follows: In a specific embodiment of this invention, the preparation of lithium difluorooxalate borate is used as an example for illustration. However, the reaction apparatus provided by this invention is not limited to the production of lithium difluorooxalate borate, and can also be used for the synthesis of other solid and liquid materials. In Example 1, the liquid material is a mixture of silicone oxalate grease and DMC solvent; the solid material is lithium tetrafluoroborate particles.

[0046] First, the liquid material is injected into the reactor 1 through the inlet pipe 101 until the liquid level in the reactor 1 exceeds the feed end of the circulation loop 3. Then, the Venturi ejector 2 is started, and under negative pressure, the liquid material is drawn into the circulation loop 3. At the same time, the solid chamber 4 is opened, and the solid material enters the circulation loop 3. In the circulation loop 3, the solid material and liquid material are initially mixed, and then enter the throat 21 of the Venturi ejector 2 for secondary mixing. As the circulation loop 3 operates, the arc plate 62, under the action of the liquid material, drives the anti-sludge rod 61 to swing up and down, impacting the blocky material at the intersection of the circulation loop 3 and the feed pipe 41. At the same time, the circulation loop 5 is started, the circulation pump 51 is turned on, and the mixture in the reactor 1 is pumped into the circulation loop 5. The heat exchanger 52 is turned on to heat or cool the mixture as needed, and then the mixture is transported back to the reactor 1. After the first circulation loop 3 and the second circulation loop 5 have been running for a period of time, the discharge pipe 102 is opened, and the material discharged from the discharge pipe 102 is the target product.

[0047] Example 2: The difference from Embodiment 1 is that the anti-sludge assembly 6 includes an anti-sludge rod 61 and a swing drive for driving the anti-sludge rod 61 to swing. One end of the anti-sludge rod 61 is hinged to the intersection of the feed pipe 41 and the circulation loop 3. The hinged end and the movable end of the anti-sludge rod 61 are arranged along the material flow direction in the circulation loop 3. The swing drive includes a swing hydraulic cylinder, which is fixedly connected to the outer wall of the feed pipe 41 (or the circulation loop 3, adjusted according to the position of the anti-sludge rod 61). The output shaft of the swing hydraulic cylinder extends into the feed pipe 41 (or the pipe of the circulation loop 3), and the output shaft of the swing hydraulic cylinder is fixed to the hinged end of the anti-sludge rod 61.

[0048] When the anti-sludge rod 61 is driven to swing, the swing hydraulic cylinder is activated to drive the anti-sludge rod 61 to swing up and down. In other embodiments, the swing motor can be replaced by an existing drive structure that can drive the anti-sludge rod 61 to swing, such as a swing cylinder or a rocker arm.

[0049] Example 3: The difference from Example 1 is that, referring to Figure 4 The anti-sludge component 6 includes a spiral blade 64, an installation structure 8, and a drive structure. The spiral blade 64 is rotatably disposed at the discharge end of the feed pipe 41.

[0050] The mounting structure 8 is used to mount the spiral blade 64. The mounting structure 8 includes a mounting ring 81 and multiple connecting ribs 82. The mounting ring 81 is fixedly connected to the feed pipe 41 through the multiple connecting ribs 82. The rotating shaft of the spiral blade 64 is rotatably connected to the mounting ring 81.

[0051] The drive structure is used to drive the spiral blade 64 to rotate. The drive structure is set on the feed tube 41 and includes a drive motor 83 and a bevel gear set 84. The drive motor 83 is fixedly set on the outer wall of the feed tube 41. The bevel gear set 84 includes a first bevel gear 841 and a second bevel gear 842. The output shaft of the drive motor 83 and the rotation shaft of the spiral blade 64 are perpendicular to each other. The output shaft of the drive motor 83 extends into the feed tube 41. The first bevel gear 841 is fixedly connected to the output shaft of the drive motor 83 and is coaxially arranged with the output shaft of the drive motor 83. The second bevel gear 842 is fixedly connected to the rotation shaft of the spiral blade 64. The first bevel gear 841 and the second bevel gear 842 mesh with each other.

[0052] The solid material in the feed pipe 41 and the liquid material in the circulation loop 3 mix at the interface to form lumpy material, which can easily clog the feed pipe 41 and affect the feeding. When feeding material into the feed pipe 41, the drive motor 83 is started. The drive motor 83 drives the bevel gear 841 to rotate, which in turn drives the bevel gear 842 to rotate, which in turn drives the spiral blade 64 to rotate, breaking up the lumpy material and preventing the feed pipe 41 from clogging.

[0053] Example 4: The difference from Example 1 is that, referring to Figure 5 The baffle is arranged in a ring shape, with the outer and inner rings of the baffle on the same plane. The baffle is set perpendicular to the side wall of the reactor, and the bottom end of the Venturi injector is located below the baffle.

[0054] Example 5: The difference from Example 1 is that, referring to Figure 6 The baffle 7 includes a fixed frame 71 and a filter screen 72. The fixed frame 71 is disposed on the inner wall of the reactor 1, and the filter screen 72 is installed on the fixed frame 71. By setting the filter screen 72, the solid phase material in the mixture is blocked from entering the circulation loop 3, and the liquid phase material is prevented from entering the circulation loop 3, so that the material flow is smoother. The material and density of the filter screen 72 can be selected according to actual needs.

[0055] The fixed frame 71 includes an annular frame one and an annular frame two. Annular frame one includes concentric frame one 711 and concentric frame two 712. The diameter of concentric frame one 711 is larger than the diameter of concentric frame two 712. Concentric frame one 711 and concentric frame two 712 are fixed by connecting rods 713. Multiple connecting rods 713 are arranged along the circumferential direction of concentric frame one 711. In this specific embodiment, four connecting rods 713 are arranged. The structure of annular frame two is the same as that of annular frame one.

[0056] Annular frame one is fixedly connected to the inner wall of reactor 11, and annular frame two is detachably connected to annular frame one by screws. Filter screen 72 is clamped and fixed by annular frame one and annular frame two. According to actual needs, filter screen 72 can also be set to multiple layers, with adjacent layers of filter screen 72 staggered. If filter screen 72 is damaged, it is easy to replace filter screen 72.

[0057] When replacing filter 72, unscrew the screw, remove the second annular frame, and then remove the old filter 72. After installing the new filter 72, align the connecting rod 713 of the second annular frame with the connecting rod 713 of the first annular frame, and screw on the screw.

[0058] Although embodiments of this application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A continuous Venturi solid-liquid reaction apparatus, characterized in that, The system includes a reactor (1), a Venturi injector (2), a first circulation loop (3), and a solids bin (4). The Venturi injector (2) is fixedly connected to the upper part of the reactor (1). The inlet (22) of the Venturi injector (2) is higher than the outlet of the Venturi injector (2). The diffuser section of the Venturi injector (2) extends into the interior of the reactor (1). The inlet of the first circulation loop (3) is connected to the reactor (1), and the outlet of the first circulation loop (3) is connected to the throat (21) of the Venturi injector (2). The outlet of the solids bin (4) is connected to the first circulation loop (3).

2. The continuous Venturi solid-liquid reaction apparatus as described in claim 1, characterized in that, The solid silo (4) is provided with a discharge pipe (41) at the discharge port, and the discharge pipe (41) is connected to the first circulation loop (3); an anti-sludge component (6) is provided at the intersection of the discharge pipe (41) and the first circulation loop (3).

3. The continuous Venturi solid-liquid reaction apparatus as described in claim 2, characterized in that, The anti-sludge component (6) includes an anti-sludge rod (61), which is swaying at the junction of the feed pipe (41) and the first circulation loop (3). The anti-sludge rod (61) can swing up and down along the height direction of the feed pipe (41).

4. The continuous Venturi solid-liquid reaction apparatus as described in claim 3, characterized in that, One end of the anti-sludge rod (61) is hinged to the junction of the feed pipe (41) and the first circulation loop (3). The hinged end and the movable end of the anti-sludge rod (61) are arranged along the material flow direction of the feed pipe (41). The anti-sludge assembly (6) also includes an arc plate (62). The arc plate (62) is arranged at the movable end of the anti-sludge rod (61). The hinged end of the anti-sludge rod (61) and the concave surface of the arc plate (62) are arranged sequentially along the material flow direction in the first circulation loop (3).

5. The continuous Venturi solid-liquid reaction apparatus as described in claim 4, characterized in that, A baffle plate (63) is provided at the junction of the feed pipe (41) and the first circulation loop (3). The baffle plate (63) is arranged parallel to the material flow direction of the first circulation loop (3) and is located below the hinge end of the anti-silt rod (61).

6. The continuous Venturi solid-liquid reaction apparatus as described in claim 3 or 4, characterized in that, The anti-sludge assembly (6) also includes a swing drive for driving the anti-sludge rod (61) to swing. The swing drive includes a swing hydraulic cylinder, and the output shaft of the swing hydraulic cylinder is fixedly connected to the anti-sludge rod (61).

7. The continuous Venturi solid-liquid reaction apparatus as described in claim 1, characterized in that, The throat (21) of the Venturi injector (2) is provided with a columnar boss, and multiple feed ports (22) are evenly distributed along the circumferential direction of the throat (21). All of the feed ports (22) are connected to the first circulation loop (3).

8. The continuous Venturi solid-liquid reaction apparatus as described in claim 1, characterized in that, A baffle (7) is provided at the bottom of the reactor (1).

9. The continuous Venturi solid-liquid reaction apparatus as described in claim 8, characterized in that, The baffle (7) is arranged in a circular ring shape, and the outer ring of the baffle (7) is fixedly connected to the inner wall of the reactor (1).

10. The continuous Venturi solid-liquid reaction apparatus as described in claim 1, characterized in that, It also includes a second circulation loop (5), the feed end of which is connected to the reactor (1), and the discharge end of which is connected to the feed inlet (22) of the Venturi injector (2); a circulation pump (51) and a heat exchanger (52) are sequentially arranged in the second circulation loop (5) along the material flow direction.

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