Layering tank with stirring system

Abstract

The utility model relates to a layering tank with a stirring system, which comprises a suspension tank, a layering tank and a feed pipe, the suspension tank is positioned below the layering tank and is connected with the layering tank, the layered liquid can form a heavy-light phase interface in the layering tank, and the layering tank further comprises a blow-down pipe arranged at the top of the layering tank; the light phase output pipe is arranged above the heavy-light phase interface in the layering tank along the horizontal direction; the heavy phase output pipe is in an inverted U shape and is arranged below a heavy-light phase interface in the layering tank, the inlet end of the heavy phase output pipe is communicated with the layering tank, and the outlet end of the heavy phase output pipe is higher than the inlet end; the inlet end of the heavy phase liquid level siphon balance pipe is communicated with the top of the layering tank, and the outlet end of the heavy phase liquid level siphon balance pipe is communicated with the heavy phase output pipe. According to the device, the glufosinate-containing saturated sodium chloride salt solution which is continuously fed into the layering tank is continuously layered, so that the purification efficiency of a product is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical process and engineering, in particular to a stratified tank with a stirring system. Background Art

[0002] Glufosinate is a non-selective herbicide that effectively controls various herbs and some broadleaf weeds by inhibiting specific metabolic pathways of plants, ultimately causing plant growth to stop and die. It is widely used in agriculture, horticulture and other land management fields.

[0003] In the production process of glufosinate herbicides, especially in certain processes, tar-like byproducts may appear due to impurities in the raw materials or side reactions generated during the reaction process. During the demixing process, these tars may combine with salt crystals to form tar-encapsulated salts. This may affect the efficiency of the demixing process and the purity of the product. In order to avoid or reduce the formation of tar-encapsulated salts, some measures may be taken during the production process, such as adjusting reaction conditions, optimizing the reaction process, and improving the purity of raw materials. In addition, the use of appropriate separation technology and purification steps can also help reduce the formation of tar-encapsulated salts and maximize the purity and quality of the product.

[0004] The separation device commonly used in the current production plant is to send the saturated sodium chloride salt solution containing glufosinate that needs to be layered into the separation device through the liquid inlet pipe. The separation device includes a stratification tank and a suspension tank. The stratification tank is located directly above the suspension tank and is connected to the suspension tank. The lighter phase of the material in the saturated sodium chloride salt solution containing glufosinate is connected to the liquid inlet pipe by the liquid inlet head connected to the stratification tank, and enters the stratification tank. Due to the different densities of the materials of each phase, during the static process, each material will be stratified in the stratification tank, and the excess solid particle salt contained in the solution moves to the suspension tank under the action of gravity, and is discharged through the discharge port opened on the suspension tank, thereby completing the first step of purification. However, since the production of glufosinate herbicides is continuously carried out, and the separation of the saturated sodium chloride salt solution containing glufosinate is intermittent, this will affect the purification efficiency of the glufosinate herbicide product. Utility Model Content

[0005] The purpose of the utility model is to overcome the above-mentioned problems existing in the prior art and to provide a stratification tank with a stirring system, which can continuously stratify a saturated sodium chloride salt solution containing glufosinate continuously fed into the stratification tank, thereby improving the purification efficiency of glufosinate herbicide products.

[0006] The utility model provides a stratification tank with a stirring system, comprising a suspension tank, a stratification tank and a feed pipe, wherein the suspension tank is located below the stratification tank and connected to the stratification tank, and the liquid after stratification in the stratification tank will form a heavy-light phase interface, and the stratification tank also includes:

[0007] A vent pipe is provided at the top of the stratified tank;

[0008] The light phase output pipe is arranged above the heavy-light phase interface and is connected to the stratification tank in the horizontal direction;

[0009] The heavy phase output pipe is in an inverted U shape and is disposed below the heavy-light phase interface, and the inlet end of the heavy phase output pipe is connected to the stratification tank, and the height of the outlet end of the heavy phase output pipe is higher than the height of the inlet end;

[0010] The heavy phase liquid level siphon balance pipe has an inlet end connected to the top of the stratification tank and an outlet end connected to the heavy phase output pipe, and is used to balance the liquid levels of the heavy phase and the light phase in the stratification tank to make the liquid level of the heavy-light phase interface constant.

[0011] Preferably, a feed pipe is arranged on the tank body of the stratification tank in the horizontal direction, and a first anti-collision baffle and a plurality of obliquely arranged stratification baffles are arranged in sequence from the outside to the inside of the feed pipe, the first anti-collision baffle is close to the liquid inlet end of the feed pipe and is arranged in the feed pipe longitudinally, the plurality of stratification baffles are divided into a plurality of groups, and each group of stratification baffles is arranged in the feed pipe longitudinally, and the stratification baffles of two adjacent groups are distributed in a mirror-symmetrical manner along the vertical direction, so that the solution is stratified due to density difference.

[0012] Preferably, the feed pipe is a special-shaped pipe, the inlet diameter of the feed pipe is smaller than the outlet diameter of the feed pipe (10), and the angle between the bottom wall of the feed pipe and the stratification tank (8) is 45°.

[0013] Preferably, the inclination angles of the mirror-symmetrically distributed layered baffles are 40-50° and 130-140° respectively, the spacing between the first anti-impact baffle and the multiple layered baffles is 100 mm, and the horizontal projection width of the multiple layered baffles is 100 m and the longitudinal length is 70-85 mm.

[0014] Preferably, a second impact baffle is longitudinally provided in the stratified tank near the outlet end of the feed pipe.

[0015] Preferably, a stirring assembly is provided longitudinally inside the suspension tank, the stirring assembly is connected to a motor located outside the suspension tank via a reducer, an anti-rotation portion is also connected between the suspension tank and the stratification tank, the anti-rotation portion is used to avoid liquid surface disturbance caused by the rotation of the stirring assembly, the anti-rotation portion comprises a first cylinder body and a plurality of obliquely arranged baffles, the plurality of obliquely arranged baffles are arranged inside the first cylinder body from top to bottom along the length direction of the first cylinder body, and the high end of each obliquely installed baffle is fixedly connected to the inner wall of the first cylinder body.

[0016] Preferably, the inclination angle of each obliquely installed baffle is 30-45°.

[0017] Preferably, the anti-rotation part also includes a swirl plate assembly, which is arranged below the multiple oblique baffles and is sealed and connected to the inner wall of the first cylinder. The swirl plate assembly includes a second cylinder, multiple plate bodies and a circular fixed plate. The circular fixed plate is arranged inside the second cylinder, and the second cylinder is concentric with the circular fixed plate. The second cylinder is fixed on the inner wall of the first cylinder, and the multiple plate bodies are obliquely connected to the second cylinder and the inner wall of the circular fixed plate along the peripheral walls of the second cylinder and the circular fixed plate.

[0018] Preferably, the horizontal angle between each plate and the inner wall of the second cylinder is 40-50°.

[0019] Preferably, a viewing window is provided on the stratification tank, and an output pipe is provided at the bottom of the suspension tank, and the output pipe is connected to a separation device.

[0020] Compared with the prior art, the beneficial effects of the utility model are:

[0021] 1. The utility model provides a light phase output pipe, a heavy phase output pipe and a heavy phase liquid level siphon balance pipe, wherein the heavy phase liquid level siphon balance pipe is used to regulate the liquid level height of the liquid outputted from the light phase output pipe and the heavy phase output pipe to be constant, and the height of the heavy phase liquid level siphon balance pipe is determined by calculation, so that the pressure in the heavy phase liquid level siphon balance pipe is the same as the pressure in the stratification tank, and then the light phase and the heavy phase can be continuously separated through the light phase output pipe and the heavy phase output pipe, thereby improving the separation efficiency.

[0022] 2. The bottom of the stratification tank of the utility model is sealed and connected to the suspension tank, and a stirring assembly is installed in the suspension tank. By starting the stirring assembly, it is possible to prevent particulate matter or tar-heavy phase from settling at the bottom of the suspension tank. By providing an anti-rotation portion between the stratification tank and the suspension tank, it is possible to prevent the liquid disturbed by the stirring assembly from rotating, thereby affecting the continuous separation of the heavy phase and the light phase in the stratification tank.

[0023] 3. The stratification tank with a stirring system provided by the utility model can continuously separate the light and heavy phases, reduce the number of equipment, and achieve stable separation control.

[0024] 4. In the utility model, a first anti-impact baffle is arranged in the feed pipe to reduce the speed of the material rushing directly into the multiple stratified baffles. The material is gradually stratified under the density and specific gravity difference in the multiple stratified baffles, which can improve the stratification efficiency in the stratified tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of a stratified tank with a stirring system according to the utility model;

[0026] Figure 2 It is a schematic diagram of a stratified tank with a stirring system when the utility model is implemented;

[0027] Figure 3 This is a schematic diagram of the structure of the swirl plate assembly of the utility model;

[0028] Figure 4 It is a structural schematic diagram of the anti-rotation device of the utility model.

[0029] Description of reference numerals:

[0030] 1—reducer and motor, 2—machine seal, 3—stirring assembly, 4—suspension tank, 4-1 output pipe, 5—first connecting flange, 6—anti-rotation device, 6-1—oblique baffle, 6-2—swirl plate assembly, 6-21—second cylinder, 6-22—plate body, 6-23—circular plate body, 7—second connecting flange, 8—stratified tank, 8-1—second anti-collision baffle, 8-2—vent pipe, 8-3—heavy phase liquid level siphon balance pipe, 8-4—light phase output pipe, 8-5—heavy phase output pipe, 9-1—strip window, 9-2—circular window, 10—feed pipe, 10-1—connecting flange, 10-2—stratified baffle, 10-3—first anti-collision baffle, 10-4—feed flange. DETAILED DESCRIPTION

[0031] The following is combined with Figure 1-4 , the specific implementation of the utility model is described in detail, but it should be understood that the protection scope of the utility model is not limited by the specific implementation. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0032] The inventor found that the commonly used separation device in the prior art is to send the saturated sodium chloride salt solution containing glufosinate that needs to be layered into the separation device through a liquid inlet pipe, and the separation device includes a layering tank and a suspension tank, the layering tank is arranged directly above the suspension tank and is connected to the suspension tank, and the lighter phase of the material in the saturated sodium chloride salt solution containing glufosinate is connected to the liquid inlet pipe by the liquid inlet head connected to the layering tank, and enters the layering tank, and due to the different densities of the materials of each phase, during the static process, each material will be layered in the layering tank, and the excess solid particle salt contained in the solution moves to the suspension tank under the action of gravity, and is discharged through the discharge port opened on the suspension tank, thereby completing the first step of purification. However, since the production of glufosinate herbicides is continuously carried out, and the separation of the saturated sodium chloride salt solution containing glufosinate is intermittent, this will affect the purification efficiency of the glufosinate herbicide product.

[0033] In order to solve the problems existing in the above-mentioned prior art, the utility model provides a stratification tank with a stirring system, which can continuously stratify the saturated sodium chloride salt solution containing glufosinate that is continuously fed into the stratification tank, thereby improving the purification efficiency of glufosinate herbicide products.

[0034] See attached Figure 1-4 As shown, in the embodiment, a stratification tank with a stirring system includes a suspension tank 4, a stratification tank 8 and a feed pipe 10. The feed pipe 10 is connected to the inlet of the stratification tank 8 through a connecting flange 10-1. The feed pipe 10 is also connected to the feed pipe through a feed flange 10-4. The suspension tank 4 is located below the stratification tank 8 and is connected to the stratification tank 8. The feed pipe 10 is arranged in the middle of the tank body of the stratification tank 8 in the horizontal direction. The setting position of the feed pipe 10 here is preferably in the middle of the stratification tank 8. The purpose of this setting is to allow the heavy phase and the light phase entering the stratification tank 8 to have enough separation time in the longitudinal position after entering the stratification tank 8, and the separation is more complete. The liquid after stratification in the stratification tank 8 will form a heavy-light phase interface. In addition, the feed pipe 10 can also be at the same height as the heavy-light phase interface. The stratification tank 8 also includes:

[0035] The vent pipe 8-2 is arranged at the top of the stratified tank 8. The vent pipe 8-2 is in a normally open state, which can avoid the problem of continuous feeding caused by excessive pressure in the stratified tank 8.

[0036] The light phase output pipe 8-4 is arranged above the heavy-light phase interface and is connected to the stratification tank 8 in the horizontal direction, and is used to output the stratified light phase in the stratification tank 8;

[0037] The heavy phase output pipe 8-5 is in an inverted U shape and is disposed below the heavy-light phase interface. The inlet end of the heavy phase output pipe 8-5 is connected to the stratification tank 8. The height of the outlet end of the heavy phase output pipe 8-5 is higher than the height of the inlet end. The height of the outlet end of the heavy phase output pipe 8-5 is higher than the height of the inlet end in order to avoid the instability of the heavy-light phase interface caused by the rapid discharge of the heavy phase output pipe 8-5.

[0038] The heavy phase liquid level siphon balance pipe 8-3 has its inlet end connected to the top of the stratification tank 8 and its outlet end connected to the heavy phase output pipe 8-5. Gas circulates inside and can adjust the pressure in the heavy phase output pipe 8-5 to balance the liquid levels of the heavy phase and the light phase in the stratification tank 8 so that the liquid level at the heavy-light phase interface is constant.

[0039] Working principle:

[0040] A light phase output pipe, a heavy phase output pipe and a heavy phase liquid level siphon balance pipe are provided, wherein the heavy phase liquid level siphon balance pipe is used to regulate the liquid level of the output liquid in the light phase output pipe 8-4 and the heavy phase output pipe 8-5 to be constant, and the installation height of the inverted U-shaped pipe of the heavy phase output pipe 8-5 is determined by calculation, so that the pressure in the heavy phase liquid level siphon balance pipe 8-3 is the same as the pressure in the stratification tank 8, and then the light phase and the heavy phase can be continuously separated through the light phase output pipe 8-4 and the heavy phase output pipe 8-5, thereby improving the separation efficiency. Among them, the heavy phase (density ρ1), the light phase (density ρ2), the feed volume ratio Vheavy phase: Vlight phase = a, the light phase outlet h2, are used to determine the installation height of the inverted U-shaped pipe of the heavy phase output pipe 8-5. Figure 2 As shown, h1: (h2-h1) = a-(Formula 1), ρ1·H = ρ1·h1+ρ2·(h2-h1)-(Formula 2). According to Formula 2, H is the installation height of the inverted U-shaped tube of the upper heavy phase output tube 8-5. According to Formula 1, the height of the interface between the heavy and light phases can be determined.

[0041] Specifically, in order to further improve the separation efficiency, a first anti-collision baffle 10-3 and a plurality of obliquely arranged stratified baffles 10-2 are sequentially arranged in the feed pipe 10 from the outside to the inside. The first anti-collision baffle 10-3 is close to the liquid inlet end of the feed pipe 10. In the case of blocking, the light phase and the heavy phase are also stratified once, and are arranged in the feed pipe 10 longitudinally. The plurality of stratified baffles 10-2 are divided into multiple groups, and each group of stratified baffles 10-2 is arranged in the feed pipe 10 longitudinally. The stratified baffles 10-2 of two adjacent groups are distributed in a mirror-symmetrical manner vertically, so that the solution is stratified due to density difference.

[0042] A first anti-impact baffle is arranged in the feed pipe to block and reduce the speed of the material rushing directly into the multiple stratified baffles. The material is gradually stratified under the density and specific gravity difference in the multiple stratified baffles, which can improve the stratification efficiency in the stratification tank.

[0043] Specifically, the feed pipe 10 is a special-shaped pipe, the inlet diameter of the feed pipe 10 is smaller than the outlet diameter of the feed pipe 10, and the angle between the bottom wall of the feed pipe 10 and the stratification tank 8 is 45°, in order to prevent the solid from accumulating at the bottom of the feed pipe 10. Therefore, the angle between the bottom wall of the feed pipe 10 and the stratification tank 8 is 45°.

[0044] Specifically, such an angle is set to further improve the separation effect. The inclination angles of the mirror-symmetrically distributed layered baffles 10-2 are 40-50° and 130-140° respectively. The spacing between the first anti-impact baffle 10-3 and the multiple layered baffles 10-2 is 100mm. The horizontal projection width of the multiple layered baffles 10-2 is 100m and the longitudinal length is 70-85mm. Such a spacing setting is to increase the flow process, that is, the straight-line forward direction of the fluid is improved to a zigzag forward direction.

[0045] Specifically, a second anti-collision baffle 8 - 1 is longitudinally provided in the stratification tank 8 near the outlet end of the feed pipe 10 . The purpose of providing the second anti-collision baffle 8 - 1 is also to achieve full separation of the light phase and the heavy phase entering the stratification tank 8 .

[0046] Specifically, a method is provided that can timely avoid the accumulation of solids in the suspension tank 4 and can also avoid the disturbance of the stratified liquid surface in the stratification tank 9 by the disturbed liquid. A stirring assembly 3 is longitudinally arranged inside the suspension tank 4, the stirring assembly 3 is connected to the motor 1 located outside the suspension tank 4 through a reducer, the stirring rod in the stirring assembly 3 is connected to the mechanical seal 2 of the suspension tank 4, and an anti-rotation part 6 is also connected between the suspension tank 4 and the stratification tank 8, the anti-rotation part 6 is used to avoid the liquid surface disturbance caused by the rotation of the stirring assembly 3, the anti-rotation part 6 includes a first cylinder and a plurality of obliquely arranged oblique baffles 6-1, the plurality of obliquely installed baffles 6-1 are arranged inside the first cylinder from top to bottom along the length direction of the first cylinder, and the high end of each obliquely installed baffle 6-1 is fixedly connected to the inner wall of the first cylinder.

[0047] Specifically, the inclination angle of each oblique baffle 6-1 is 30-45 degrees, which can not only ensure that the solid-heavy phase can smoothly enter the bottom of the suspension tank 4, but also increase the barrier and reduce the influence of the liquid rotation caused by stirring on the upper layer solution.

[0048] Specifically, the anti-rotation part 6 is connected to the suspension tank 4 and the stratification tank 8 through the first connecting flange 5 and the second connecting flange 7 respectively. The anti-rotation part 6 also includes a swirl plate assembly 6-2, which is arranged below the plurality of oblique baffles 6-1 and is sealed with the inner wall of the first cylinder. The swirl plate assembly 6-2 includes a second cylinder 6-21, a plurality of plate bodies 6-22 and a circular fixed plate 6-23. The circular fixed plate 6-23 is arranged inside the second cylinder 6-21, and the second cylinder 6-21 is concentric with the circular fixed plate 6-23. The second cylinder 6-21 is fixed on the inner wall of the first cylinder, and the plurality of plate bodies 6-22 are obliquely connected to the inner walls of the second cylinder 6-21 and the circular fixed plate 6-23 along the peripheral walls of the second cylinder 6-21 and the circular fixed plate 6-23.

[0049] Specifically, each plate 6-22 is welded to the inner wall of the second cylinder 6-21, and the horizontal angle between each plate 6-22 and the inner wall of the second cylinder 6-21 is 40 to 50 degrees. This angle can not only ensure that the solid-heavy phase can smoothly enter the bottom of the suspension tank 4, but also increase the barrier and reduce the influence of the stirring to make the liquid rotate on the upper layer solution.

[0050] Specifically, a viewing window is provided on the stratification tank 8, and a discharge port is provided at the bottom of the suspension tank 4, and the discharge port is connected to the separation device.

[0051] The diameter of the feed pipe 10 is determined according to the feed flow rate to ensure that the flow rate after entering the splitter is low and within the laminar flow range. The material output pipe is connected to the feed flange 10-4. The material enters the feed pipe 10 and is then blocked by the anti-collision baffle 10-3 and enters the stratification baffle 10-2. The material begins to stratify here due to the density difference, with the light phase going up and the heavy phase going down. If this is to prevent solids from accumulating at the bottom.

[0052] After the heavy and light phases enter the stratification tank 8, the light phase continues to move upward under the obstruction of the second impact baffle 8-1, and then flows horizontally to the light phase output pipe 8-4 for output. Similarly, the heavy phase is output from the heavy phase output pipe 8-5. Since there is still solid material and the density is greater than that of the heavy phase, it will continue to move down to the suspension tank 4. Under the stirring, the solid material is suspended in the heavy phase system. The size of the suspension tank 4 is determined according to the solid content in the material to ensure that it is suspended in a sufficient heavy phase without sedimentation.

[0053] Due to the stirring at the bottom, an anti-rotation device 6 is added. Under the action of the swirl plate assembly 6-2, the upper heavy phase can be prevented from rotating in the stirring direction, and then under the action of the multilayer 6-1, the rotation is continued. The oblique baffle 6-1 and the swirl plate assembly 6-2 here are both inclined to prevent material accumulation. In extreme cases, the anti-rotation device 6 can be removed for cleaning.

[0054] Continuous discharge can be achieved in the suspension tank 4, and the suspension enters the separation equipment from the output pipe 4-1. The solid material is subsequently processed, and the heavy phase after separation can also be used for recycling.

[0055] The layered tank 8 has windows, which are a strip window 9-1 and a circular window 9-2. The specific installation position can be determined according to the heavy-light interface.

[0056] Example

[0057] The device can be used in two scenarios: light and heavy phase separation and solid separation.

[0058] Scenario 1:

[0059] The mixed solution of dibromoethane and diquat aqueous solution extraction enters the stratification tank 8 through the feed pipe 10, is separated by multiple stratification baffles 10-2 in the feed pipe 10, and is sent to the stratification tank 8, and the light / heavy phase stratification continues in the stratification tank 8, the clean light phase is discharged from the light phase output pipe 8-4, and the clean heavy phase is discharged from the heavy phase output pipe 8-5. Tar (heavy phase-tar) is still in the stratified solution, which will reach the suspension tank 4 under the action of gravity, and be discharged from the output pipe 4-1 to the filtering equipment, and the heavy phase is recovered after filtration.

[0060] Scenario 2:

[0061] In the production of refined glufosinate ammonium, diethylamine hydrochloride recovery is involved. Specifically, caustic soda flakes are added to diethylamine hydrochloride and saturated sodium chloride aqueous solution and stirred in a reactor. After the reactor is neutralized and qualified, it is pumped into the feed pipe 10, and enters the stratification tank 8 through the feed pipe 10. After being separated by multiple stratification baffles 10-2 in the feed pipe 10, it is sent into the stratification tank 8, and the light / heavy phase stratification is continued in the stratification tank 8. Clean light phase diethylamine is discharged from the light phase output pipe 8-4, and clean saturated sodium chloride aqueous solution is discharged from the heavy phase output pipe 8-5. The supersaturated sodium chloride solution reaches the suspension tank 4 under the action of gravity, and is discharged from the output pipe 4-1 to the filtering equipment, and the heavy phase is recovered after filtration. The sodium chloride aqueous solution is recycled after filtration.

[0062] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A stratification tank with a stirring system, comprising a suspension tank (4) and a stratification tank (8), wherein the suspension tank (4) is located below the stratification tank (8) and connected to the stratification tank (8), characterized in that: After the stratification in the stratification tank (8), the liquid will form a heavy-light phase interface. The stratification tank (8) also includes: A vent pipe (8-2) is arranged at the top of the stratification tank (8); The light phase output pipe (8-4) is arranged above the heavy-light phase interface and is connected to the stratification tank (8) in the horizontal direction; The heavy phase output pipe (8-5) is in an inverted U shape and is disposed below the heavy-light phase interface. The inlet end of the heavy phase output pipe (8-5) is connected to the stratification tank (8), and the height of the outlet end of the heavy phase output pipe (8-5) is higher than the height of the inlet end. The heavy phase liquid level siphon balance pipe (8-3) has an inlet end connected to the top of the stratification tank (8) and an outlet end connected to the heavy phase output pipe (8-5) and is used to balance the liquid levels of the heavy phase and the light phase in the stratification tank (8) so that the liquid level of the heavy-light phase interface is constant.

2. A stratified tank with a stirring system according to claim 1, characterized in that: A feed pipe (10) is arranged on the tank body of the stratification tank (8) in the horizontal direction. A first anti-collision baffle (10-3) and a plurality of obliquely arranged stratification baffles (10-2) are arranged in sequence from the outside to the inside of the feed pipe (10). The first anti-collision baffle (10-3) is close to the liquid inlet end of the feed pipe (10) and is arranged in the feed pipe (10) along the longitudinal direction. The plurality of stratification baffles (10-2) are divided into a plurality of groups, and each group of stratification baffles (10-2) is arranged in the feed pipe (10) along the longitudinal direction. The stratification baffles (10-2) of two adjacent groups are distributed in a mirror-symmetrical manner in the vertical direction, so that the solution is stratified due to density difference.

3. A stratified tank with a stirring system according to claim 2, characterized in that: The feed pipe (10) is a special-shaped pipe, the inlet diameter of the feed pipe (10) is smaller than the outlet diameter of the feed pipe (10), and the angle between the bottom wall of the feed pipe (10) and the stratification tank (8) is 45°.

4. The stratified tank with a stirring system according to claim 2, characterized in that: The inclination angles of the mirror-symmetrically distributed layered baffles (10-2) are 40-50° and 130-140° respectively, the spacing between the first anti-collision baffle (10-3) and the plurality of layered baffles (10-2) is 100 mm, and the horizontal projection width of the plurality of layered baffles (10-2) is 100 m and the longitudinal length is 70-85 mm.

5. The stratified tank with a stirring system according to claim 2, characterized in that: A second impact baffle (8-1) is longitudinally arranged in the stratified tank (8) near the outlet end of the feed pipe (10).

6. The stratified tank with a stirring system according to claim 1, characterized in that: A stirring assembly (3) is longitudinally arranged inside the suspension tank (4); the stirring assembly (3) is connected to a motor (1) located outside the suspension tank (4) via a reducer; an anti-rotation portion (6) is also connected between the suspension tank (4) and the stratification tank (8); the anti-rotation portion (6) is used to avoid liquid surface disturbance caused by the rotation of the stirring assembly (3); the anti-rotation portion (6) comprises a first cylinder and a plurality of inclined baffles (6-1) arranged obliquely; the plurality of inclined baffles (6-1) are arranged inside the first cylinder from top to bottom along the length direction of the first cylinder; and the high end of each inclined baffle (6-1) is fixedly connected to the inner wall of the first cylinder.

7. The stratified tank with a stirring system according to claim 6, characterized in that: The inclination angle of each obliquely mounted baffle (6-1) is 30-45°.

8. The stratified tank with a stirring system according to claim 6, characterized in that: The anti-swirl part (6) also includes a swirl plate assembly (6-2), which is arranged below the plurality of oblique baffles (6-1) and is sealed to the inner wall of the first cylinder. The swirl plate assembly (6-2) includes a second cylinder (6-21), a plurality of plate bodies (6-22) and a circular fixed plate (6-23). ​​The circular fixed plate (6-23) is arranged inside the second cylinder (6-21), and the second cylinder (6-21) and the circular fixed plate (6-23) are cocentric. The second cylinder (6-21) is fixed to the inner wall of the first cylinder. The plurality of plate bodies (6-22) are obliquely connected to the inner walls of the second cylinder (6-21) and the circular fixed plate (6-23) along the peripheral walls of the second cylinder (6-21) and the circular fixed plate (6-23).

9. The stratified tank with a stirring system according to claim 8, characterized in that: The horizontal angle between each plate body (6-22) and the inner wall of the second cylinder body (6-21) is 40 to 50 degrees.

10. The stratified tank with a stirring system according to claim 1, characterized in that: The stratification tank (8) is provided with a viewing window, and the bottom of the suspension tank (4) is provided with an output pipe (4-1), and the output pipe (4-1) is connected to a separation device.

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