A two-stage flocculant solution adding structure of a sodium aluminate solution impurity removal device

Abstract

The present application relates to the technical field of sodium aluminate solution production, and provides a two-section flocculant solution adding structure of a sodium aluminate solution impurity removal device, which comprises a reaction kettle, a feed pipe is through and fixedly connected to the top of the reaction kettle, a heat exchange pipe is arranged in the reaction kettle, a discharge pipe is through and fixedly connected to the bottom of the reaction kettle, a manhole is through and fixedly connected to the side of the reaction kettle, and a motor is fixedly installed on the top of the reaction kettle, the two-section liquid injection mechanism is arranged, when the sodium aluminate solution enters the reaction kettle, cold water cools the sodium aluminate solution through the heat exchange pipe, the motor is started to drive the stirring shaft to stir, the piston cylinder, the toothed rod, the rotating gear and other components are matched, the liquid inlet pipe sucks the flocculant solution in the solution tank, and the liquid outlet pipe A and the liquid outlet pipe B are two-section and convey the flocculant solution into the reaction kettle, so that the sodium aluminate solution is fully reacted, and the impurity removal effect is improved.

Description

Technical Field

[0001] This invention relates to the field of sodium aluminate solution production technology, specifically to a two-stage flocculant solution addition structure for a sodium aluminate solution impurity removal device. Background Technology

[0002] After leaching, the aluminum ore slurry reacts to form a sodium aluminate solution. Various impurities in the slurry (such as compounds and solid particles of silicon, iron, and titanium) dissolve simultaneously in the sodium aluminate solution, reducing its purity. Flocculants are needed to settle these impurities and separate them from the sodium aluminate solution. However, due to the high mineralization of industrial water, removing silicon, iron, and titanium impurities introduces new impurities such as calcium and magnesium ions into the sodium aluminate solution. Furthermore, these calcium and magnesium ions react chemically with the carboxylic acid and amide groups of the flocculant, affecting the extension and adsorption properties of the flocculant molecular chains, thus weakening the flocculation and sedimentation effect on impurities in the sodium aluminate solution. Simultaneously, uncontrolled temperature in the flocculation solution can cause the flocculant molecular chains to break, introducing new impurities into the sodium aluminate solution and leading to a decrease in the purity of the sintered alumina product.

[0003] Currently, in the process of removing impurities from sodium aluminate solution, industrial water is usually used to prepare flocculant solution, which is then added to sodium aluminate solution. The original flocculant solution addition technology is a three-stage addition, which has the disadvantages of large flocculant solution dosage and uncontrollable addition amount at each point, resulting in poor adsorption effect of impurities in sodium aluminate solution. Therefore, it needs to be improved. Summary of the Invention

[0004] To overcome the above-mentioned defects, embodiments of the present invention provide a two-stage flocculant solution addition structure for a sodium aluminate solution impurity removal device, which solves the technical problems in related technologies.

[0005] At least one embodiment of the present invention provides a two-stage flocculant solution addition structure for a sodium aluminate solution impurity removal device, comprising: a reaction vessel, a feed pipe connected through and fixedly connected to the top of the reaction vessel, a heat exchange pipe disposed inside the reaction vessel, a discharge pipe connected through and fixedly connected to the bottom of the reaction vessel, a manhole connected through and fixedly connected to the side of the reaction vessel, a motor fixedly installed on the top of the reaction vessel, a stirring shaft fixedly connected to the output shaft of the motor, and a two-stage liquid injection mechanism disposed on the side of the reaction vessel away from the manhole; the two-stage liquid injection mechanism includes a solution tank, a cavity, and a rotating gear, the solution tank being fixedly connected to the side of the reaction vessel away from the manhole, and the top of the solution tank... A piston cylinder is fixedly connected to the main body. A return spring is installed inside the piston cylinder. A piston rod is slidably connected inside the piston cylinder through the return spring. A toothed rod is fixedly connected to the end of the piston rod away from the return spring. An inlet pipe is passed through and fixedly connected to the bottom of the piston cylinder. An outlet pipe A is passed through and fixedly connected to the side of the piston cylinder. A one-way valve is installed inside both the inlet pipe and the outlet pipe A. An outlet pipe B is passed through and fixedly connected to the side of the outlet pipe A. A cavity is opened inside the stirring shaft. An injection pipe is passed through and fixedly connected to the side of the cavity. A rotating gear is fixedly connected to the surface of the stirring shaft. A stirring mechanism and an anti-clogging mechanism are provided on the side of the solution tank.

[0006] According to one embodiment of this application, the teeth on the rotating gear are initially engaged with the teeth on the rack, and the rotating gear is an incomplete gear. When the rotating gear rotates and its teeth engage with the teeth on the rack, it will drive the rack to move to the left.

[0007] The end of the inlet pipe away from the piston cylinder is connected to the solution tank through and fixedly connected. The one-way valve in the inlet pipe is unidirectionally open to the inside of the piston cylinder. When a negative pressure is formed inside the piston cylinder, the flocculant solution in the solution tank will be drawn into the piston cylinder through the inlet pipe.

[0008] The end of the outlet pipe A away from the piston cylinder is connected to the cavity through and rotates, and the one-way valve in the outlet pipe A is unidirectionally open towards the cavity. When the flocculant solution in the piston cylinder is squeezed, it will be transported into the cavity through the outlet pipe A.

[0009] The end of the outlet pipe B, away from the outlet pipe A, is connected to the reactor through and fixedly. The end of the inlet pipe, away from the piston cylinder, is equipped with a filter cartridge. Part of the flocculant solution in the outlet pipe A will directly enter the reactor through the outlet pipe B. The filter cartridge can filter the flocculant solution.

[0010] The mixing mechanism includes a bevel gear A and a rotating rod. The bevel gear A is fixedly connected to the surface of the stirring shaft. The rotating rod passes through and is rotatably connected to the side of the solution tank. A bevel gear B is fixedly connected to the side of the rotating rod, and a stirring blade is fixedly connected to the surface of the rotating rod.

[0011] The bevel gear A and bevel gear B mesh perpendicularly. The stirring blade is located inside the solution tank. When bevel gear A rotates, it drives bevel gear B to rotate. When the rotating rod rotates, it drives the stirring blade to stir the flocculant solution in the solution tank.

[0012] The anti-clogging mechanism includes a squeezing ring and a pressure chamber. The squeezing ring is fixedly connected to the surface of the rotating rod. The pressure chamber passes through and is fixedly connected to the side of the solution tank. An air bladder is provided at one end of the pressure chamber, and a piston push rod is slidably connected inside the other end of the pressure chamber. An impact block is fixedly connected to the end of the piston push rod away from the pressure chamber.

[0013] A sealing ring is provided at the connection between the airbag and the pressure chamber. The airbag is initially in an inflated state. When the airbag is squeezed, the air pressure inside it enters the pressure chamber and pushes the piston rod upward.

[0014] The end of the airbag furthest from the pressure chamber is close to the compression ring. The impact block is initially located directly below the filter cylinder. When the piston rod moves upward, it will cause the impact block to impact the filter cylinder's mesh.

[0015] The present invention provides a two-stage flocculant solution addition structure for a sodium aluminate solution impurity removal device. Compared with the prior art, by setting a two-stage injection mechanism, when the sodium aluminate solution enters the reactor, cold water cools the sodium aluminate solution through heat exchange tubes, and the motor drives the stirring shaft to stir, the flocculant solution is also drawn from the solution tank by the inlet pipe and transported to the reactor in two stages through outlet pipes A and B through the cooperation of components such as piston cylinder, toothed rod, and rotating gear. This ensures that the flocculant solution reacts fully with the sodium aluminate solution and improves the impurity removal effect.

[0016] The present invention provides a two-stage flocculant solution addition structure for a sodium aluminate solution impurity removal device. Compared with the prior art, by setting up a stirring mechanism, the flocculant solution in the solution tank is stirred evenly by the stirring blades driven by the bevel gear A, bevel gear B and other components during the stirring process driven by the motor, so as to make the concentration uniform and prevent the stratification that occurs when the solution is left to stand for a long time.

[0017] The present invention provides a two-stage flocculant solution addition structure for a sodium aluminate solution impurity removal device. Compared with the prior art, by setting an anti-clogging mechanism, the flocculant solution in the solution tank is stirred by the rotating rod driving the stirring blades, and the impact block is also moved intermittently upward to impact the filter cartridge through the cooperation of components such as the extrusion ring, air pressure chamber, and air bag, thereby preventing the filter cartridge from clogging. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a three-dimensional front view of the overall structure of the present invention; Figure 2 This is a three-dimensional rear view of the overall structure of the present invention; Figure 3 This is a three-dimensional sectional view of the overall structure of the present invention; Figure 4 This is a three-dimensional schematic diagram of the two-stage liquid injection mechanism of the present invention; Figure 5 This is a three-dimensional sectional view of the stirring mechanism structure of the present invention; Figure 6 This is a three-dimensional sectional view of the anti-blocking mechanism structure of the present invention; Figure 7 For the present invention Figure 6 Enlarged view of the structure at point A in the middle.

[0020] In the diagram: 1. Reactor; 2. Feed pipe; 3. Discharge pipe; 4. Manhole; 5. Heat exchanger tube; 6. Motor; 7. Stirring shaft; 8. Two-stage liquid injection mechanism; 81. Solution tank; 82. Piston cylinder; 83. Return spring; 84. Piston rod; 85. Gear rod; 86. Liquid inlet pipe; 87. Filter cartridge; 88. Liquid outlet pipe A; 89. Liquid outlet pipe B; 810. Cavity; 811. Liquid injection pipe; 812. Rotating gear; 9. Stirring mechanism; 91. Bevel gear A; 92. Rotating rod; 93. Bevel gear B; 94. Stirring blade; 10. Anti-clogging mechanism; 101. Squeezing ring; 102. Pressure chamber; 103. Air bladder; 104. Piston push rod; 105. Impact block. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of this application will be described in more detail below with reference to the accompanying drawings. In the drawings, the same or similar reference numerals denote the same or similar components or components having the same or similar functions throughout. The described embodiments are some, but not all, embodiments of this application. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0022] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, an indirect connection through an intermediate medium, or the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0023] In the description of this application, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", 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 device 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.

[0024] The terms "first," "second," "third," "fourth," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented, for example, in a sequence other than those illustrated or described herein.

[0025] To make the drawings concise and easy to understand, some drawings only show one of the components with the same structure or function, or only one of them is marked. In this article, "one" not only means "only one", but can also mean "more than one", and "several" includes "two" and "more than two".

[0026] Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not necessarily limited to those explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus. It is understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. The embodiments of this application are described in detail below with reference to the accompanying drawings.

[0027] like Figures 1-7 As shown, this invention illustrates a two-stage flocculant solution addition structure for a sodium aluminate solution impurity removal device according to an embodiment of the present invention. The structure includes a reactor 1, with a feed pipe 2 connected through and fixed to the top of the reactor 1. A heat exchange pipe 5 is installed inside the reactor 1. A discharge pipe 3 is connected through and fixed to the bottom of the reactor 1. A manhole 4 is connected through and fixed to the side of the reactor 1. A motor 6 is fixedly installed on the top of the reactor 1, and a stirring shaft 7 is fixedly connected to the output shaft of the motor 6. A two-stage injection mechanism 8 is provided on the side of the reactor 1 away from the manhole 4. The two-stage injection mechanism 8 includes a solution tank 81, a cavity 810, and a rotating gear 812. The solution tank 81 is fixedly connected to the side of the reactor 1 away from the manhole 4, and a piston is fixedly connected to the top of the solution tank 81. The piston cylinder 82 has a return spring 83 inside, and a piston rod 84 is slidably connected inside the piston cylinder 82 through the return spring 83. A toothed rod 85 is fixedly connected to the end of the piston rod 84 away from the return spring 83. An inlet pipe 86 is fixedly connected through the bottom of the piston cylinder 82, and an outlet pipe A88 is fixedly connected through the side of the piston cylinder 82. Both the inlet pipe 86 and the outlet pipe A88 are equipped with one-way valves. An outlet pipe B89 is fixedly connected through the side of the outlet pipe A88. A cavity 810 is opened inside the stirring shaft 7. An injection pipe 811 is fixedly connected through the side of the cavity 810. A rotating gear 812 is fixedly connected to the surface of the stirring shaft 7. A stirring mechanism 9 and an anti-blocking mechanism 10 are provided on the side of the solution tank 81.

[0028] In the initial state, the teeth on the rotating gear 812 mesh with the teeth on the rack 85. The rotating gear 812 is an incomplete gear. When the rotating gear 812 rotates and its teeth mesh with the teeth on the rack 85, it will drive the rack 85 to move to the left.

[0029] The end of the inlet pipe 86 away from the piston cylinder 82 is connected to the solution tank 81 through and fixedly connected. The one-way valve in the inlet pipe 86 is unidirectionally open to the inside of the piston cylinder 82. When a negative pressure is formed in the piston cylinder 82, the flocculant solution in the solution tank 81 will be drawn into the piston cylinder 82 through the inlet pipe 86.

[0030] The end of the outlet pipe A88 away from the piston cylinder 82 is connected to the cavity 810 through and rotates. The one-way valve in the outlet pipe A88 is unidirectionally open towards the cavity 810. When the flocculant solution in the piston cylinder 82 is squeezed, it will be transported to the cavity 810 through the outlet pipe A88.

[0031] The end of the outlet pipe B89 away from the outlet pipe A88 is connected to the reactor 1 through and fixedly. The end of the inlet pipe 86 away from the piston cylinder 82 is equipped with a filter cylinder 87. The flocculant solution in the outlet pipe A88 will directly enter the reactor 1 through the outlet pipe B89. The filter cylinder 87 can filter the flocculant solution.

[0032] This embodiment provides a two-stage flocculant solution addition structure for a sodium aluminate solution impurity removal device. By setting up a two-stage injection mechanism 8, when the sodium aluminate solution enters the reactor 1, cold water cools the sodium aluminate solution through the heat exchange tube 5, and the motor 6 drives the stirring shaft 7 to stir, the inlet pipe 86 draws the flocculant solution from the solution tank 81 through the cooperation of components such as the piston cylinder 82, the toothed rod 85, and the rotating gear 812, and then delivers it to the reactor 1 in two stages through the outlet pipes A88 and B89. This ensures that the flocculant solution reacts fully with the sodium aluminate solution and improves the impurity removal effect.

[0033] refer to Figure 1 and Figure 7 In some embodiments, the stirring mechanism 9 includes a bevel gear A91 and a rotating rod 92. The bevel gear A91 is fixedly connected to the surface of the stirring shaft 7, and the rotating rod 92 is rotatably connected to the side of the solution tank 81. A bevel gear B93 is fixedly connected to the side of the rotating rod 92, and a stirring blade 94 is fixedly connected to the surface of the rotating rod 92.

[0034] In a specific embodiment, bevel gear A91 and bevel gear B93 mesh perpendicularly, and stirring blade 94 is located inside solution tank 81. When bevel gear A91 rotates, it drives bevel gear B93 to rotate. When rotating rod 92 rotates, it drives stirring blade 94 to stir the flocculant solution in solution tank 81.

[0035] The anti-blocking mechanism 10 includes a squeezing ring 101 and a pressure chamber 102. The squeezing ring 101 is fixedly connected to the surface of the rotating rod 92. The pressure chamber 102 passes through and is fixedly connected to the side of the solution tank 81. An air bladder 103 is provided at one end of the pressure chamber 102. A piston push rod 104 is slidably connected inside the other end of the pressure chamber 102. An impact block 105 is fixedly connected to the end of the piston push rod 104 away from the pressure chamber 102.

[0036] A sealing ring is provided at the connection between the airbag 103 and the air pressure chamber 102. The airbag 103 is initially in an inflated state. When the airbag 103 is squeezed, the air pressure inside it will enter the air pressure chamber 102 and push the piston rod 104 to move upward.

[0037] The end of the airbag 103 furthest from the pressure chamber 102 is close to the compression ring 101. The impact block 105 is initially located directly below the filter cartridge 87. When the piston rod 104 moves upward, it will cause the impact block 105 to impact the mesh of the filter cartridge 87. Furthermore, the sodium aluminate solution enters the reactor 1 through the feed pipe 2. Cold water flows through the heat exchange pipe 5 to remove the heat from the sodium aluminate solution, thereby cooling the solution. Turning on the motor 6 drives the stirring shaft 7 to stir, making the cooling more uniform. The rotation of the stirring shaft 7 also drives the rotating gear 812 to rotate. When the teeth of the rotating gear 812 mesh with the teeth on the gear rod 85, it causes the gear rod 85 to move to the left. The leftward movement of the gear rod 85 causes the piston rod 84 to move to the left, stretching the return spring 83, while the piston rod 84 moves to the left. When the piston moves to the left, a negative pressure is created inside the piston cylinder 82, drawing the flocculant solution from the solution tank 81 into the piston cylinder 82 through the inlet pipe 86. When the rotating gear 812 disengages from the rack 85, the return spring 83 rebounds, causing the piston rod 84 and rack 85 to move to the right to restore their original position. At this time, the flocculant solution inside the piston cylinder 82 is compressed, causing it to be transported into the cavity 810 through the outlet pipe A88. A portion of the flocculant solution in the outlet pipe A88 will directly enter the reaction vessel 1 through the outlet pipe B89. The liquid outlet pipe B89 delivers the solution to the reactor 1 in two stages to ensure a complete reaction with the sodium aluminate solution, thus improving the impurity removal effect. The rotation of the stirring shaft 7 also drives the bevel gear A91, which in turn drives the bevel gear B93, which in turn drives the rotating rod 92. The rotation of the rotating rod 92 drives the stirring blades 94 to stir the flocculant solution in the solution tank 81, ensuring a uniform concentration of the flocculant solution and preventing stratification during long-term settling. The rotation of the rotating rod 92 also drives the extrusion ring 101 to rotate. As the compression ring 101 rotates with the rotating rod 92, it repeatedly compresses the airbag 103. When the airbag 103 is compressed, the air pressure inside it enters the air pressure chamber 102, pushing the piston rod 104 upward. When the piston rod 104 moves upward, it drives the impact block 105 to impact the mesh of the filter cartridge 87. When the airbag 103 rebounds due to its own elasticity, the air pressure returns to the airbag 103. The piston rod 104 drives the impact block 105 to move downward and return to its original position. The impact block 105 intermittently moves upward and impacts the filter cartridge 87, thereby preventing the filter cartridge 87 from becoming clogged.

[0038] The above 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 two-stage flocculant solution addition structure for a sodium aluminate solution impurity removal device, characterized in that, The reactor includes a reactor (1), with a feed pipe (2) connected through and fixed to the top of the reactor (1), a heat exchange pipe (5) installed inside the reactor (1), a discharge pipe (3) connected through and fixed to the bottom of the reactor (1), a manhole (4) connected through and fixed to the side of the reactor (1), a motor (6) fixedly installed on the top of the reactor (1), a stirring shaft (7) fixedly connected to the output shaft of the motor (6), and a two-stage liquid injection mechanism (8) provided on the side of the reactor (1) away from the manhole (4). The two-stage liquid injection mechanism (8) includes a solution tank (81), a cavity (810), and a rotating gear (812). The solution tank (81) is fixedly connected to the side of the reactor (1) away from the manhole (4). A piston cylinder (82) is fixedly connected to the top of the solution tank (81). A return spring (83) is provided inside the piston cylinder (82). A piston rod (84) is slidably connected inside the piston cylinder (82) through the return spring (83). A toothed rod (85) is fixedly connected to the end of the piston rod (84) away from the return spring (83). The bottom of the piston cylinder (82) is through and fixed. The piston cylinder (82) is connected to an inlet pipe (86), and an outlet pipe A (88) is fixedly connected to the side of the piston cylinder (82). Both the inlet pipe (86) and the outlet pipe A (88) are equipped with a one-way valve. An outlet pipe B (89) is fixedly connected to the side of the outlet pipe A (88). The cavity (810) is opened inside the stirring shaft (7). An injection pipe (811) is fixedly connected to the side of the cavity (810). The rotating gear (812) is fixedly connected to the surface of the stirring shaft (7). The side of the solution tank (81) is equipped with a stirring mechanism (9) and an anti-blocking mechanism (10).

2. The two-stage flocculant solution addition structure of the sodium aluminate solution impurity removal device according to claim 1, characterized in that, The teeth on the rotating gear (812) mesh with the teeth on the rack (85) in the initial state, and the rotating gear (812) is an incomplete gear.

3. The two-stage flocculant solution addition structure of the sodium aluminate solution impurity removal device according to claim 2, characterized in that, The end of the inlet pipe (86) away from the piston cylinder (82) is connected to the solution tank (81) through and fixedly connected. The one-way valve inside the inlet pipe (86) is for one-way flow into the piston cylinder (82).

4. The two-stage flocculant solution addition structure of the sodium aluminate solution impurity removal device according to claim 3, characterized in that, The end of the outlet pipe A (88) away from the piston cylinder (82) is connected to the cavity (810) through and rotatably, and the one-way valve in the outlet pipe A (88) is unidirectionally open to the cavity (810).

5. The two-stage flocculant solution addition structure of the sodium aluminate solution impurity removal device according to claim 4, characterized in that, The end of the outlet pipe B (89) away from the outlet pipe A (88) is connected to the reactor (1) through and fixedly connected, and the end of the inlet pipe (86) away from the piston cylinder (82) is provided with a filter cylinder (87).

6. The two-stage flocculant solution addition structure of the sodium aluminate solution impurity removal device according to claim 5, characterized in that, The stirring mechanism (9) includes a bevel gear A (91) and a rotating rod (92). The bevel gear A (91) is fixedly connected to the surface of the stirring shaft (7). The rotating rod (92) passes through and is rotatably connected to the side of the solution tank (81). A bevel gear B (93) is fixedly connected to the side of the rotating rod (92). A stirring blade (94) is fixedly connected to the surface of the rotating rod (92).

7. The two-stage flocculant solution addition structure of the sodium aluminate solution impurity removal device according to claim 6, characterized in that, The bevel gear A (91) meshes perpendicularly with the bevel gear B (93), and the stirring blade (94) is located inside the solution tank (81).

8. The two-stage flocculant solution addition structure of the sodium aluminate solution impurity removal device according to claim 7, characterized in that, The anti-blocking mechanism (10) includes a squeezing ring (101) and a pressure chamber (102). The squeezing ring (101) is fixedly connected to the surface of the rotating rod (92). The pressure chamber (102) passes through and is fixedly connected to the side of the solution tank (81). An air bladder (103) is provided at one end of the pressure chamber (102). A piston push rod (104) is slidably connected inside the other end of the pressure chamber (102). An impact block (105) is fixedly connected to the end of the piston push rod (104) away from the pressure chamber (102).

9. The two-stage flocculant solution addition structure of the sodium aluminate solution impurity removal device according to claim 8, characterized in that, A sealing ring is provided at the connection between the airbag (103) and the air chamber (102), and the airbag (103) is in an inflated state in the initial state.

10. The two-stage flocculant solution addition structure of the sodium aluminate solution impurity removal device according to claim 9, characterized in that, The end of the airbag (103) away from the pressure chamber (102) is close to the compression ring (101), and the impact block (105) is initially located directly below the filter cylinder (87).

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